-/* \r
- * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers\r
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.\r
- * Copyright (c) 1996 by Silicon Graphics. All rights reserved.\r
- * Copyright (c) 2000-2004 Hewlett-Packard Development Company, L.P.\r
- *\r
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED\r
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.\r
- *\r
- * Permission is hereby granted to use or copy this program\r
- * for any purpose, provided the above notices are retained on all copies.\r
- * Permission to modify the code and to distribute modified code is granted,\r
- * provided the above notices are retained, and a notice that the code was\r
- * modified is included with the above copyright notice.\r
- */\r
-\r
-/*\r
- * This header is private to the gc. It is almost always included from\r
- * gc_priv.h. However it is possible to include it by itself if just the\r
- * configuration macros are needed. In that\r
- * case, a few declarations relying on types declared in gc_priv.h will be\r
- * omitted.\r
- */\r
- \r
-#ifndef GCCONFIG_H\r
-\r
-# define GCCONFIG_H\r
-\r
-# ifndef GC_PRIVATE_H\r
- /* Fake ptr_t declaration, just to avoid compilation errors. */\r
- /* This avoids many instances if "ifndef GC_PRIVATE_H" below. */\r
- typedef struct GC_undefined_struct * ptr_t;\r
-# endif\r
-\r
-/* Machine dependent parameters. Some tuning parameters can be found */\r
-/* near the top of gc_private.h. */\r
-\r
-/* Machine specific parts contributed by various people. See README file. */\r
-\r
-/* First a unified test for Linux: */\r
-# if defined(linux) || defined(__linux__)\r
-# ifndef LINUX\r
-# define LINUX\r
-# endif\r
-# endif\r
-\r
-/* And one for NetBSD: */\r
-# if defined(__NetBSD__)\r
-# define NETBSD\r
-# endif\r
-\r
-/* And one for OpenBSD: */\r
-# if defined(__OpenBSD__)\r
-# define OPENBSD\r
-# endif\r
-\r
-/* And one for FreeBSD: */\r
-# if defined(__FreeBSD__) && !defined(FREEBSD)\r
-# define FREEBSD\r
-# endif\r
-\r
-/* And one for Darwin: */\r
-# if defined(macosx) || (defined(__APPLE__) && defined(__MACH__))\r
-# define DARWIN\r
-# endif\r
-\r
-/* Determine the machine type: */\r
-# if defined(__arm__) || defined(__thumb__)\r
-# define ARM32\r
-# if !defined(LINUX) && !defined(NETBSD) && !defined(DARWIN)\r
-# define NOSYS\r
-# define mach_type_known\r
-# endif\r
-# endif\r
-# if defined(sun) && defined(mc68000)\r
-# define M68K\r
-# define SUNOS4\r
-# define mach_type_known\r
-# endif\r
-# if defined(hp9000s300)\r
-# define M68K\r
-# define HP\r
-# define mach_type_known\r
-# endif\r
-# if defined(OPENBSD) && defined(m68k)\r
-# define M68K\r
-# define mach_type_known\r
-# endif\r
-# if defined(OPENBSD) && defined(__sparc__)\r
-# define SPARC\r
-# define mach_type_known\r
-# endif\r
-# if defined(NETBSD) && (defined(m68k) || defined(__m68k__))\r
-# define M68K\r
-# define mach_type_known\r
-# endif\r
-# if defined(NETBSD) && defined(__powerpc__)\r
-# define POWERPC\r
-# define mach_type_known\r
-# endif\r
-# if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))\r
-# define ARM32\r
-# define mach_type_known\r
-# endif\r
-# if defined(NETBSD) && defined(__sh__)\r
-# define SH\r
-# define mach_type_known\r
-# endif\r
-# if defined(vax)\r
-# define VAX\r
-# ifdef ultrix\r
-# define ULTRIX\r
-# else\r
-# define BSD\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(__NetBSD__) && defined(__vax__)\r
-# define VAX\r
-# define mach_type_known\r
-# endif\r
-# if defined(mips) || defined(__mips) || defined(_mips)\r
-# define MIPS\r
-# if defined(nec_ews) || defined(_nec_ews)\r
-# define EWS4800\r
-# endif\r
-# if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD)\r
-# if defined(ultrix) || defined(__ultrix)\r
-# define ULTRIX\r
-# else\r
-# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \\r
- || defined(__SYSTYPE_SVR4__)\r
-# define IRIX5 /* or IRIX 6.X */\r
-# else\r
-# define RISCOS /* or IRIX 4.X */\r
-# endif\r
-# endif\r
-# endif /* !LINUX */\r
-# if defined(__NetBSD__) && defined(__MIPSEL__)\r
-# undef ULTRIX\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(DGUX) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# ifndef _USING_DGUX\r
-# define _USING_DGUX\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(sequent) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define SEQUENT\r
-# define mach_type_known\r
-# endif\r
-# if defined(sun) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define SUNOS5\r
-# define mach_type_known\r
-# endif\r
-# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)\r
-# define I386\r
-# define OS2\r
-# define mach_type_known\r
-# endif\r
-# if defined(ibm032)\r
-# define RT\r
-# define mach_type_known\r
-# endif\r
-# if defined(sun) && (defined(sparc) || defined(__sparc))\r
-# define SPARC\r
- /* Test for SunOS 5.x */\r
-# include <errno.h>\r
-# ifdef ECHRNG\r
-# define SUNOS5\r
-# else\r
-# define SUNOS4\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \\r
- && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)\r
-# define SPARC\r
-# define DRSNX\r
-# define mach_type_known\r
-# endif\r
-# if defined(_IBMR2)\r
-# define RS6000\r
-# define mach_type_known\r
-# endif\r
-# if defined(__NetBSD__) && defined(__sparc__)\r
-# define SPARC\r
-# define mach_type_known\r
-# endif\r
-# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)\r
- /* The above test may need refinement */\r
-# define I386\r
-# if defined(_SCO_ELF)\r
-# define SCO_ELF\r
-# else\r
-# define SCO\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(_AUX_SOURCE)\r
-# define M68K\r
-# define SYSV\r
-# define mach_type_known\r
-# endif\r
-# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \\r
- || defined(hppa) || defined(__hppa__)\r
-# define HP_PA\r
-# if !defined(LINUX) && !defined(HPUX)\r
-# define HPUX\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(__ia64) && defined(_HPUX_SOURCE)\r
-# define IA64\r
-# ifndef HPUX\r
-# define HPUX\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(__BEOS__) && defined(_X86_)\r
-# define I386\r
-# define BEOS\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__x86_64__)\r
-# define X86_64\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && (defined(__ia64__) || defined(__ia64))\r
-# define IA64\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__arm__)\r
-# define ARM32\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__cris__)\r
-# ifndef CRIS\r
-# define CRIS\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) || \\r
- defined(powerpc64) || defined(__powerpc64__))\r
-# define POWERPC\r
-# define mach_type_known\r
-# endif\r
-# if defined(FREEBSD) && (defined(powerpc) || defined(__powerpc__))\r
-# define POWERPC\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__mc68000__)\r
-# define M68K\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && (defined(sparc) || defined(__sparc__))\r
-# define SPARC\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__arm__)\r
-# define ARM32\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__sh__)\r
-# define SH\r
-# define mach_type_known\r
-# endif\r
-# if defined(LINUX) && defined(__m32r__)\r
-# define M32R\r
-# define mach_type_known\r
-# endif\r
-# if defined(__alpha) || defined(__alpha__)\r
-# define ALPHA\r
-# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)\r
-# define OSF1 /* a.k.a Digital Unix */\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(_AMIGA) && !defined(AMIGA)\r
-# define AMIGA\r
-# endif\r
-# ifdef AMIGA \r
-# define M68K\r
-# define mach_type_known\r
-# endif\r
-# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)\r
-# define M68K\r
-# define MACOS\r
-# define mach_type_known\r
-# endif\r
-# if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)\r
-# define POWERPC\r
-# define MACOS\r
-# define mach_type_known\r
-# endif\r
-# ifdef DARWIN\r
-# if defined(__ppc__) || defined(__ppc64__)\r
-# define POWERPC\r
-# define mach_type_known\r
-# elif defined(__i386__)\r
-# define I386\r
-# define mach_type_known\r
-# define DARWIN_DONT_PARSE_STACK\r
-# define OS_TYPE "DARWIN"\r
-# define DYNAMIC_LOADING\r
- /* XXX: see get_end(3), get_etext() and get_end() should not be used.\r
- These aren't used when dyld support is enabled (it is by default) */\r
-# define DATASTART ((ptr_t) get_etext())\r
-# define DATAEND ((ptr_t) get_end())\r
-# define STACKBOTTOM ((ptr_t) 0xc0000000)\r
-# define USE_MMAP\r
-# define USE_MMAP_ANON\r
-# define USE_ASM_PUSH_REGS\r
- /* This is potentially buggy. It needs more testing. See the comments in\r
- os_dep.c. It relies on threads to track writes. */\r
-# ifdef GC_DARWIN_THREADS\r
-/* # define MPROTECT_VDB -- diabled for now. May work for some apps. */\r
-# endif\r
-# include <unistd.h>\r
-# define GETPAGESIZE() getpagesize()\r
- /* There seems to be some issues with trylock hanging on darwin. This\r
- should be looked into some more */\r
-# define NO_PTHREAD_TRYLOCK\r
-# elif defined(__arm__)\r
-# define ARM\r
-# define mach_type_known\r
-# define DARWIN_DONT_PARSE_STACK\r
-# define GC_DONT_REGISTER_MAIN_STATIC_DATA\r
-# endif\r
-# endif\r
-# if defined(NeXT) && defined(mc68000)\r
-# define M68K\r
-# define NEXT\r
-# define mach_type_known\r
-# endif\r
-# if defined(NeXT) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define NEXT\r
-# define mach_type_known\r
-# endif\r
-# if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define OPENBSD\r
-# define mach_type_known\r
-# endif\r
-# if defined(FREEBSD) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define mach_type_known\r
-# endif\r
-# if defined(FREEBSD) && defined(__x86_64__)\r
-# define X86_64\r
-# define mach_type_known\r
-# endif\r
-# if defined(__NetBSD__) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define mach_type_known\r
-# endif\r
-# if defined(__NetBSD__) && defined(__x86_64__)\r
-# define X86_64\r
-# define mach_type_known\r
-# endif\r
-# if defined(FREEBSD) && defined(__sparc__)\r
-# define SPARC\r
-# define mach_type_known\r
-#endif\r
-# if defined(bsdi) && (defined(i386) || defined(__i386__))\r
-# define I386\r
-# define BSDI\r
-# define mach_type_known\r
-# endif\r
-# if !defined(mach_type_known) && defined(__386BSD__)\r
-# define I386\r
-# define THREE86BSD\r
-# define mach_type_known\r
-# endif\r
-# if defined(_CX_UX) && defined(_M88K)\r
-# define M88K\r
-# define CX_UX\r
-# define mach_type_known\r
-# endif\r
-# if defined(DGUX) && defined(m88k)\r
-# define M88K\r
- /* DGUX defined */\r
-# define mach_type_known\r
-# endif\r
-# if defined(_WIN32_WCE)\r
- /* SH3, SH4, MIPS already defined for corresponding architectures */\r
-# if defined(SH3) || defined(SH4)\r
-# define SH\r
-# endif\r
-# if defined(x86)\r
-# define I386\r
-# endif\r
-# if defined(ARM)\r
-# define ARM32\r
-# endif\r
-# define MSWINCE\r
-# define mach_type_known\r
-# else\r
-# if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \\r
- || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)\r
-# if defined(__LP64__) || defined(_WIN64)\r
-# define X86_64\r
-# else\r
-# define I386\r
-# endif\r
-# define MSWIN32 /* or Win64 */\r
-# define mach_type_known\r
-# endif\r
-# if defined(_MSC_VER) && defined(_M_IA64)\r
-# define IA64\r
-# define MSWIN32 /* Really win64, but we don't treat 64-bit */\r
- /* variants as a differnt platform. */\r
-# endif\r
-# endif\r
-# if defined(__DJGPP__)\r
-# define I386\r
-# ifndef DJGPP\r
-# define DJGPP /* MSDOS running the DJGPP port of GCC */\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(__CYGWIN32__) || defined(__CYGWIN__)\r
-# define I386\r
-# define CYGWIN32\r
-# define mach_type_known\r
-# endif\r
-# if defined(__MINGW32__)\r
-# define I386\r
-# define MSWIN32\r
-# define mach_type_known\r
-# endif\r
-# if defined(__BORLANDC__)\r
-# define I386\r
-# define MSWIN32\r
-# define mach_type_known\r
-# endif\r
-# if defined(_UTS) && !defined(mach_type_known)\r
-# define S370\r
-# define UTS4\r
-# define mach_type_known\r
-# endif\r
-# if defined(__pj__)\r
-# define PJ\r
-# define mach_type_known\r
-# endif\r
-# if defined(__embedded__) && defined(PPC)\r
-# define POWERPC\r
-# define NOSYS\r
-# define mach_type_known\r
-# endif\r
-/* Ivan Demakov */\r
-# if defined(__WATCOMC__) && defined(__386__)\r
-# define I386\r
-# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)\r
-# if defined(__OS2__)\r
-# define OS2\r
-# else\r
-# if defined(__WINDOWS_386__) || defined(__NT__)\r
-# define MSWIN32\r
-# else\r
-# define DOS4GW\r
-# endif\r
-# endif\r
-# endif\r
-# define mach_type_known\r
-# endif\r
-# if defined(__s390__) && defined(LINUX)\r
-# define S390\r
-# define mach_type_known\r
-# endif\r
-# if defined(__GNU__)\r
-# if defined(__i386__)\r
-/* The Debian Hurd running on generic PC */ \r
-# define HURD\r
-# define I386\r
-# define mach_type_known\r
-# endif \r
-# endif\r
-\r
-/* Feel free to add more clauses here */\r
-\r
-/* Or manually define the machine type here. A machine type is */\r
-/* characterized by the architecture. Some */\r
-/* machine types are further subdivided by OS. */\r
-/* the macros ULTRIX, RISCOS, and BSD to distinguish. */\r
-/* Note that SGI IRIX is treated identically to RISCOS. */\r
-/* SYSV on an M68K actually means A/UX. */\r
-/* The distinction in these cases is usually the stack starting address */\r
-# ifndef mach_type_known\r
- --> unknown machine type\r
-# endif\r
- /* Mapping is: M68K ==> Motorola 680X0 */\r
- /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */\r
- /* MACOS and AMIGA variants) */\r
- /* I386 ==> Intel 386 */\r
- /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */\r
- /* FREEBSD, THREE86BSD, MSWIN32, */\r
- /* BSDI,SUNOS5, NEXT, other variants) */\r
- /* NS32K ==> Encore Multimax */\r
- /* MIPS ==> R2000 or R3000 */\r
- /* (RISCOS, ULTRIX variants) */\r
- /* VAX ==> DEC VAX */\r
- /* (BSD, ULTRIX variants) */\r
- /* RS6000 ==> IBM RS/6000 AIX3.X */\r
- /* RT ==> IBM PC/RT */\r
- /* HP_PA ==> HP9000/700 & /800 */\r
- /* HP/UX, LINUX */\r
- /* SPARC ==> SPARC v7/v8/v9 */\r
- /* (SUNOS4, SUNOS5, LINUX, */\r
- /* DRSNX variants) */\r
- /* ALPHA ==> DEC Alpha */\r
- /* (OSF1 and LINUX variants) */\r
- /* M88K ==> Motorola 88XX0 */\r
- /* (CX_UX and DGUX) */\r
- /* S370 ==> 370-like machine */\r
- /* running Amdahl UTS4 */\r
- /* S390 ==> 390-like machine */\r
- /* running LINUX */\r
- /* ARM32 ==> Intel StrongARM */\r
- /* IA64 ==> Intel IPF */\r
- /* (e.g. Itanium) */\r
- /* (LINUX and HPUX) */\r
- /* SH ==> Hitachi SuperH */\r
- /* (LINUX & MSWINCE) */\r
- /* X86_64 ==> AMD x86-64 */\r
- /* POWERPC ==> IBM/Apple PowerPC */\r
- /* (MACOS(<=9),DARWIN(incl.MACOSX),*/\r
- /* LINUX, NETBSD, NOSYS variants) */\r
- /* Handles 32 and 64-bit variants. */\r
- /* AIX should be handled here, but */\r
- /* that's called an RS6000. */\r
- /* CRIS ==> Axis Etrax */\r
- /* M32R ==> Renesas M32R */\r
-\r
-\r
-/*\r
- * For each architecture and OS, the following need to be defined:\r
- *\r
- * CPP_WORDSZ is a simple integer constant representing the word size.\r
- * in bits. We assume byte addressibility, where a byte has 8 bits.\r
- * We also assume CPP_WORDSZ is either 32 or 64.\r
- * (We care about the length of pointers, not hardware\r
- * bus widths. Thus a 64 bit processor with a C compiler that uses\r
- * 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)\r
- *\r
- * MACH_TYPE is a string representation of the machine type.\r
- * OS_TYPE is analogous for the OS.\r
- *\r
- * ALIGNMENT is the largest N, such that\r
- * all pointer are guaranteed to be aligned on N byte boundaries.\r
- * defining it to be 1 will always work, but perform poorly.\r
- *\r
- * DATASTART is the beginning of the data segment.\r
- * On some platforms SEARCH_FOR_DATA_START is defined.\r
- * SEARCH_FOR_DATASTART will cause GC_data_start to\r
- * be set to an address determined by accessing data backwards from _end\r
- * until an unmapped page is found. DATASTART will be defined to be\r
- * GC_data_start.\r
- * On UNIX-like systems, the collector will scan the area between DATASTART\r
- * and DATAEND for root pointers.\r
- *\r
- * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.\r
- * RTH suggests gaining access to linker script synth'd values with\r
- * this idiom instead of `&end' where `end' is defined as ``extern int end;'' .\r
- * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g.,\r
- * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-*\r
- * without any special options.\r
- *\r
- * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice\r
- * the pointer size.\r
- *\r
- * STACKBOTTOM is the cool end of the stack, which is usually the\r
- * highest address in the stack.\r
- * Under PCR or OS/2, we have other ways of finding thread stacks.\r
- * For each machine, the following should:\r
- * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and\r
- * 2) define exactly one of\r
- * STACKBOTTOM (should be defined to be an expression)\r
- * LINUX_STACKBOTTOM\r
- * HEURISTIC1\r
- * HEURISTIC2\r
- * If STACKBOTTOM is defined, then it's value will be used directly as the\r
- * stack base. If LINUX_STACKBOTTOM is defined, then it will be determined\r
- * with a method appropriate for most Linux systems. Currently we look\r
- * first for __libc_stack_end, and if that fails read it from /proc.\r
- * If either of the last two macros are defined, then STACKBOTTOM is computed\r
- * during collector startup using one of the following two heuristics:\r
- * HEURISTIC1: Take an address inside GC_init's frame, and round it up to\r
- * the next multiple of STACK_GRAN.\r
- * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly\r
- * in small steps (decrement if STACK_GROWS_UP), and read the value\r
- * at each location. Remember the value when the first\r
- * Segmentation violation or Bus error is signalled. Round that\r
- * to the nearest plausible page boundary, and use that instead\r
- * of STACKBOTTOM.\r
- *\r
- * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,\r
- * the value of environ is a pointer that can serve as STACKBOTTOM.\r
- * I expect that HEURISTIC2 can be replaced by this approach, which\r
- * interferes far less with debugging. However it has the disadvantage\r
- * that it's confused by a putenv call before the collector is initialized.\r
- * This could be dealt with by intercepting putenv ...\r
- *\r
- * If no expression for STACKBOTTOM can be found, and neither of the above\r
- * heuristics are usable, the collector can still be used with all of the above\r
- * undefined, provided one of the following is done:\r
- * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)\r
- * without reference to STACKBOTTOM. This is appropriate for use in\r
- * conjunction with thread packages, since there will be multiple stacks.\r
- * (Allocating thread stacks in the heap, and treating them as ordinary\r
- * heap data objects is also possible as a last resort. However, this is\r
- * likely to introduce significant amounts of excess storage retention\r
- * unless the dead parts of the thread stacks are periodically cleared.)\r
- * 2) Client code may set GC_stackbottom before calling any GC_ routines.\r
- * If the author of the client code controls the main program, this is\r
- * easily accomplished by introducing a new main program, setting\r
- * GC_stackbottom to the address of a local variable, and then calling\r
- * the original main program. The new main program would read something\r
- * like:\r
- *\r
- * # include "gc_private.h"\r
- *\r
- * main(argc, argv, envp)\r
- * int argc;\r
- * char **argv, **envp;\r
- * {\r
- * int dummy;\r
- *\r
- * GC_stackbottom = (ptr_t)(&dummy);\r
- * return(real_main(argc, argv, envp));\r
- * }\r
- *\r
- *\r
- * Each architecture may also define the style of virtual dirty bit\r
- * implementation to be used:\r
- * MPROTECT_VDB: Write protect the heap and catch faults.\r
- * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.\r
- *\r
- * An architecture may define DYNAMIC_LOADING if dynamic_load.c\r
- * defined GC_register_dynamic_libraries() for the architecture.\r
- *\r
- * An architecture may define PREFETCH(x) to preload the cache with *x.\r
- * This defaults to a no-op.\r
- *\r
- * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.\r
- *\r
- * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to\r
- * clear the two words at GC_malloc-aligned address x. By default,\r
- * word stores of 0 are used instead.\r
- *\r
- * HEAP_START may be defined as the initial address hint for mmap-based\r
- * allocation.\r
- */\r
-\r
-/* If we are using a recent version of gcc, we can use __builtin_unwind_init()\r
- * to push the relevant registers onto the stack. This generally makes\r
- * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers.\r
- */\r
-# if defined(__GNUC__) && ((__GNUC__ >= 3) || \\r
- (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) \\r
- && !defined(__INTEL_COMPILER) \\r
- && !defined(__PATHCC__)\r
-# define HAVE_BUILTIN_UNWIND_INIT\r
-# endif\r
-\r
-# define STACK_GRAN 0x1000000\r
-# ifdef M68K\r
-# define MACH_TYPE "M68K"\r
-# define ALIGNMENT 2\r
-# ifdef OPENBSD\r
-# define OS_TYPE "OPENBSD"\r
-# define HEURISTIC2\r
-# ifdef __ELF__\r
-# define DATASTART GC_data_start\r
-# define DYNAMIC_LOADING\r
-# else\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# ifdef __ELF__\r
-# define DATASTART GC_data_start\r
-# define DYNAMIC_LOADING\r
-# else\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define STACKBOTTOM ((ptr_t)0xf0000000)\r
-# define USE_GENERIC_PUSH_REGS\r
- /* We never got around to the assembly version. */\r
-/* # define MPROTECT_VDB - Reported to not work 9/17/01 */\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# include <features.h>\r
-# if defined(__GLIBC__)&& __GLIBC__>=2\r
-# define SEARCH_FOR_DATA_START\r
-# else /* !GLIBC2 */\r
- extern char **__environ;\r
-# define DATASTART ((ptr_t)(&__environ))\r
- /* hideous kludge: __environ is the first */\r
- /* word in crt0.o, and delimits the start */\r
- /* of the data segment, no matter which */\r
- /* ld options were passed through. */\r
- /* We could use _etext instead, but that */\r
- /* would include .rodata, which may */\r
- /* contain large read-only data tables */\r
- /* that we'd rather not scan. */\r
-# endif /* !GLIBC2 */\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# else\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# endif\r
-# ifdef SUNOS4\r
-# define OS_TYPE "SUNOS4"\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0x1ffff) & ~0x1ffff))\r
-# define HEURISTIC1 /* differs */\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef HP\r
-# define OS_TYPE "HP"\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# define STACKBOTTOM ((ptr_t) 0xffeffffc)\r
- /* empirically determined. seems to work. */\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)\r
-# endif\r
-# ifdef SYSV\r
-# define OS_TYPE "SYSV"\r
- extern etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \\r
- & ~0x3fffff) \\r
- +((word)etext & 0x1fff))\r
- /* This only works for shared-text binaries with magic number 0413.\r
- The other sorts of SysV binaries put the data at the end of the text,\r
- in which case the default of etext would work. Unfortunately,\r
- handling both would require having the magic-number available.\r
- -- Parag\r
- */\r
-# define STACKBOTTOM ((ptr_t)0xFFFFFFFE)\r
- /* The stack starts at the top of memory, but */\r
- /* 0x0 cannot be used as setjump_test complains */\r
- /* that the stack direction is incorrect. Two */\r
- /* bytes down from 0x0 should be safe enough. */\r
- /* --Parag */\r
-# include <sys/mmu.h>\r
-# define GETPAGESIZE() PAGESIZE /* Is this still right? */\r
-# endif\r
-# ifdef AMIGA\r
-# define OS_TYPE "AMIGA"\r
- /* STACKBOTTOM and DATASTART handled specially */\r
- /* in os_dep.c */\r
-# define DATAEND /* not needed */\r
-# define GETPAGESIZE() 4096\r
-# endif\r
-# ifdef MACOS\r
-# ifndef __LOWMEM__\r
-# include <LowMem.h>\r
-# endif\r
-# define OS_TYPE "MACOS"\r
- /* see os_dep.c for details of global data segments. */\r
-# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())\r
-# define DATAEND /* not needed */\r
-# define GETPAGESIZE() 4096\r
-# endif\r
-# ifdef NEXT\r
-# define OS_TYPE "NEXT"\r
-# define DATASTART ((ptr_t) get_etext())\r
-# define STACKBOTTOM ((ptr_t) 0x4000000)\r
-# define DATAEND /* not needed */\r
-# endif\r
-# endif\r
-\r
-# if defined(POWERPC)\r
-# define MACH_TYPE "POWERPC"\r
-# ifdef MACOS\r
-# define ALIGNMENT 2 /* Still necessary? Could it be 4? */\r
-# ifndef __LOWMEM__\r
-# include <LowMem.h>\r
-# endif\r
-# define OS_TYPE "MACOS"\r
- /* see os_dep.c for details of global data segments. */\r
-# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())\r
-# define DATAEND /* not needed */\r
-# endif\r
-\r
-# ifdef LINUX\r
-# if defined(__powerpc64__)\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# ifndef HBLKSIZE\r
-# define HBLKSIZE 4096\r
-# endif\r
-# else\r
-# define ALIGNMENT 4\r
-# endif\r
-# define OS_TYPE "LINUX"\r
- /* HEURISTIC1 has been reliably reported to fail for a 32-bit */\r
- /* executable on a 64 bit kernel. */\r
-# define LINUX_STACKBOTTOM\r
-# define DYNAMIC_LOADING\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# endif\r
-# ifdef DARWIN\r
-# ifdef __ppc64__\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# else\r
-# define ALIGNMENT 4\r
-# endif\r
-# define OS_TYPE "DARWIN"\r
-# define DYNAMIC_LOADING\r
- /* XXX: see get_end(3), get_etext() and get_end() should not be used.\r
- These aren't used when dyld support is enabled (it is by default) */\r
-# define DATASTART ((ptr_t) get_etext())\r
-# define DATAEND ((ptr_t) get_end())\r
-# define STACKBOTTOM ((ptr_t) 0xc0000000)\r
-# define USE_MMAP\r
-# define USE_MMAP_ANON\r
-# define USE_ASM_PUSH_REGS\r
- /* This is potentially buggy. It needs more testing. See the comments in\r
- os_dep.c. It relies on threads to track writes. */\r
-# ifdef GC_DARWIN_THREADS\r
-/* # define MPROTECT_VDB -- diabled for now. May work for some apps. */\r
-# endif\r
-# include <unistd.h>\r
-# define GETPAGESIZE() getpagesize()\r
-# if defined(USE_PPC_PREFETCH) && defined(__GNUC__)\r
- /* The performance impact of prefetches is untested */\r
-# define PREFETCH(x) \\r
- __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))\r
-# define PREFETCH_FOR_WRITE(x) \\r
- __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))\r
-# endif\r
- /* There seems to be some issues with trylock hanging on darwin. This\r
- should be looked into some more */\r
-# define NO_PTHREAD_TRYLOCK\r
-# endif\r
-# ifdef FREEBSD\r
-# define ALIGNMENT 4\r
-# define OS_TYPE "FREEBSD"\r
-# ifndef GC_FREEBSD_THREADS\r
-# define MPROTECT_VDB\r
-# endif\r
-# define SIG_SUSPEND SIGUSR1\r
-# define SIG_THR_RESTART SIGUSR2\r
-# define FREEBSD_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
- extern char etext[];\r
- extern char * GC_FreeBSDGetDataStart();\r
-# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)\r
-# endif\r
-# ifdef NETBSD\r
-# define ALIGNMENT 4\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
- extern char etext[];\r
-# define DATASTART GC_data_start\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef SN_TARGET_PS3\r
-# define NO_GETENV\r
-# define CPP_WORDSZ 32\r
-# define ALIGNMENT 4\r
- extern int _end [];\r
-// extern int _dso_handle[];\r
- extern int __bss_start;\r
-\r
-# define DATAEND (_end)\r
-# define DATASTART (__bss_start)\r
-# define STACKBOTTOM ((ptr_t) ps3_get_stack_bottom ())\r
-# define USE_GENERIC_PUSHREGS\r
-# endif\r
-\r
-# ifdef NOSYS\r
-# define ALIGNMENT 4\r
-# define OS_TYPE "NOSYS"\r
- extern void __end[], __dso_handle[];\r
-# define DATASTART (__dso_handle) /* OK, that's ugly. */\r
-# define DATAEND (__end)\r
- /* Stack starts at 0xE0000000 for the simulator. */\r
-# undef STACK_GRAN\r
-# define STACK_GRAN 0x10000000\r
-# define HEURISTIC1\r
-# endif\r
-# endif\r
-\r
-# ifdef VAX\r
-# define MACH_TYPE "VAX"\r
-# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# ifdef BSD\r
-# define OS_TYPE "BSD"\r
-# define HEURISTIC1\r
- /* HEURISTIC2 may be OK, but it's hard to test. */\r
-# endif\r
-# ifdef ULTRIX\r
-# define OS_TYPE "ULTRIX"\r
-# define STACKBOTTOM ((ptr_t) 0x7fffc800)\r
-# endif\r
-# endif\r
-\r
-# ifdef RT\r
-# define MACH_TYPE "RT"\r
-# define ALIGNMENT 4\r
-# define DATASTART ((ptr_t) 0x10000000)\r
-# define STACKBOTTOM ((ptr_t) 0x1fffd800)\r
-# endif\r
-\r
-# ifdef SPARC\r
-# define MACH_TYPE "SPARC"\r
-# if defined(__arch64__) || defined(__sparcv9)\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# define ELF_CLASS ELFCLASS64\r
-# else\r
-# define ALIGNMENT 4 /* Required by hardware */\r
-# define CPP_WORDSZ 32\r
-# endif\r
-# define ALIGN_DOUBLE\r
-# ifdef _FILE_OFFSET_BITS\r
-# undef _FILE_OFFSET_BITS /* libelf.h & procfs.h doesn't compile with large file support */\r
-# define _FILE_OFFSET_BITS 32\r
-# endif\r
-# ifdef SUNOS5\r
-# define OS_TYPE "SUNOS5"\r
- extern int _etext[];\r
- extern int _end[];\r
- extern ptr_t GC_SysVGetDataStart();\r
-# define DATASTART GC_SysVGetDataStart(0x10000, _etext)\r
-# define DATAEND (_end)\r
-# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)\r
-# define USE_MMAP\r
- /* Otherwise we now use calloc. Mmap may result in the */\r
- /* heap interleaved with thread stacks, which can result in */\r
- /* excessive blacklisting. Sbrk is unusable since it */\r
- /* doesn't interact correctly with the system malloc. */\r
-# endif\r
-# ifdef USE_MMAP\r
-# define HEAP_START (ptr_t)0x40000000\r
-# else\r
-# define HEAP_START DATAEND\r
-# endif\r
-# define PROC_VDB\r
-/* HEURISTIC1 reportedly no longer works under 2.7. */\r
-/* HEURISTIC2 probably works, but this appears to be preferable. */\r
-/* Apparently USRSTACK is defined to be USERLIMIT, but in some */\r
-/* installations that's undefined. We work around this with a */\r
-/* gross hack: */\r
-# include <sys/vmparam.h>\r
-# ifdef USERLIMIT\r
- /* This should work everywhere, but doesn't. */\r
-# define STACKBOTTOM USRSTACK\r
-# else\r
-# define HEURISTIC2\r
-# endif\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGESIZE)\r
- /* getpagesize() appeared to be missing from at least one */\r
- /* Solaris 5.4 installation. Weird. */\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef SUNOS4\r
-# define OS_TYPE "SUNOS4"\r
- /* [If you have a weak stomach, don't read this.] */\r
- /* We would like to use: */\r
-/* # define DATASTART ((ptr_t)((((word) (etext)) + 0x1fff) & ~0x1fff)) */\r
- /* This fails occasionally, due to an ancient, but very */\r
- /* persistent ld bug. etext is set 32 bytes too high. */\r
- /* We instead read the text segment size from the a.out */\r
- /* header, which happens to be mapped into our address space */\r
- /* at the start of the text segment. The detective work here */\r
- /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */\r
- /* Serpette of INRIA. */\r
- /* This assumes ZMAGIC, i.e. demand-loadable executables. */\r
-# define TEXTSTART 0x2000\r
-# define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))\r
-# define MPROTECT_VDB\r
-# define HEURISTIC1\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef DRSNX\r
-# define OS_TYPE "DRSNX"\r
- extern ptr_t GC_SysVGetDataStart();\r
- extern int etext[];\r
-# define DATASTART GC_SysVGetDataStart(0x10000, etext)\r
-# define MPROTECT_VDB\r
-# define STACKBOTTOM ((ptr_t) 0xdfff0000)\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# else\r
- Linux Sparc/a.out not supported\r
-# endif\r
-# define SVR4\r
-# include <features.h>\r
-# if defined(__GLIBC__) && __GLIBC__ >= 2\r
-# define SEARCH_FOR_DATA_START\r
-# else\r
- extern char **__environ;\r
-# define DATASTART ((ptr_t)(&__environ))\r
- /* hideous kludge: __environ is the first */\r
- /* word in crt0.o, and delimits the start */\r
- /* of the data segment, no matter which */\r
- /* ld options were passed through. */\r
- /* We could use _etext instead, but that */\r
- /* would include .rodata, which may */\r
- /* contain large read-only data tables */\r
- /* that we'd rather not scan. */\r
-# endif\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# define LINUX_STACKBOTTOM\r
-# endif\r
-# ifdef OPENBSD\r
-# define OS_TYPE "OPENBSD"\r
-# define STACKBOTTOM ((ptr_t) 0xf8000000)\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# ifdef __ELF__\r
-# define DATASTART GC_data_start\r
-# define DYNAMIC_LOADING\r
-# else\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# endif\r
-# ifdef FREEBSD\r
-# define OS_TYPE "FREEBSD"\r
-# define SIG_SUSPEND SIGUSR1\r
-# define SIG_THR_RESTART SIGUSR2\r
-# define FREEBSD_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
- extern char etext[];\r
- extern char edata[];\r
- extern char end[];\r
-# define NEED_FIND_LIMIT\r
-# define DATASTART ((ptr_t)(&etext))\r
-# define DATAEND (GC_find_limit (DATASTART, TRUE))\r
-# define DATASTART2 ((ptr_t)(&edata))\r
-# define DATAEND2 ((ptr_t)(&end))\r
-# endif\r
-# endif\r
-\r
-# ifdef I386\r
-# define MACH_TYPE "I386"\r
-# if defined(__LP64__) || defined(_WIN64)\r
-# define CPP_WORDSZ 64\r
-# define ALIGNMENT 8\r
-# else\r
-# define CPP_WORDSZ 32\r
-# define ALIGNMENT 4\r
- /* Appears to hold for all "32 bit" compilers */\r
- /* except Borland. The -a4 option fixes */\r
- /* Borland. */\r
- /* Ivan Demakov: For Watcom the option is -zp4. */\r
-# endif\r
-# ifndef SMALL_CONFIG\r
-# define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */\r
- /* improvement on Pentiums. */\r
-# endif\r
-# ifdef HAVE_BUILTIN_UNWIND_INIT\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# ifdef SEQUENT\r
-# define OS_TYPE "SEQUENT"\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# define STACKBOTTOM ((ptr_t) 0x3ffff000) \r
-# endif\r
-# ifdef BEOS\r
-# define OS_TYPE "BEOS"\r
-# include <OS.h>\r
-# define GETPAGESIZE() B_PAGE_SIZE\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# ifdef SUNOS5\r
-# define OS_TYPE "SUNOS5"\r
- extern int _etext[], _end[];\r
- extern ptr_t GC_SysVGetDataStart();\r
-# define DATASTART GC_SysVGetDataStart(0x1000, _etext)\r
-# define DATAEND (_end)\r
-/* # define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7, */\r
-/* but reportedly breaks under 2.8. It appears that the stack */\r
-/* base is a property of the executable, so this should not break */\r
-/* old executables. */\r
-/* HEURISTIC2 probably works, but this appears to be preferable. */\r
-# include <sys/vm.h>\r
-# define STACKBOTTOM USRSTACK\r
-/* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */\r
-/* It appears to be fixed in 2.8 and 2.9. */\r
-# ifdef SOLARIS25_PROC_VDB_BUG_FIXED\r
-/* Reading of dirty bits doesn't seem to work even in solaris 10 */\r
-/*# define PROC_VDB */\r
-# endif\r
-# define DYNAMIC_LOADING\r
-# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)\r
-# define USE_MMAP\r
- /* Otherwise we now use calloc. Mmap may result in the */\r
- /* heap interleaved with thread stacks, which can result in */\r
- /* excessive blacklisting. Sbrk is unusable since it */\r
- /* doesn't interact correctly with the system malloc. */\r
-# endif\r
-# ifdef USE_MMAP\r
-# define HEAP_START (ptr_t)0x40000000\r
-# else\r
-# define HEAP_START DATAEND\r
-# endif\r
-# endif\r
-# ifdef SCO\r
-# define OS_TYPE "SCO"\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \\r
- & ~0x3fffff) \\r
- +((word)etext & 0xfff))\r
-# define STACKBOTTOM ((ptr_t) 0x7ffffffc)\r
-# endif\r
-# ifdef SCO_ELF\r
-# define OS_TYPE "SCO_ELF"\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# define STACKBOTTOM ((ptr_t) 0x08048000)\r
-# define DYNAMIC_LOADING\r
-# define ELF_CLASS ELFCLASS32\r
-# endif\r
-# ifdef DGUX\r
-# define OS_TYPE "DGUX"\r
- extern int _etext, _end;\r
- extern ptr_t GC_SysVGetDataStart();\r
-# define DATASTART GC_SysVGetDataStart(0x1000, &_etext)\r
-# define DATAEND (&_end)\r
-# define STACK_GROWS_DOWN\r
-# define HEURISTIC2\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGESIZE)\r
-# define DYNAMIC_LOADING\r
-# ifndef USE_MMAP\r
-# define USE_MMAP\r
-# endif /* USE_MMAP */\r
-# define MAP_FAILED (void *) -1\r
-# ifdef USE_MMAP\r
-# define HEAP_START (ptr_t)0x40000000\r
-# else /* USE_MMAP */\r
-# define HEAP_START DATAEND\r
-# endif /* USE_MMAP */\r
-# endif /* DGUX */\r
-\r
-# ifdef LINUX\r
-# ifndef __GNUC__\r
- /* The Intel compiler doesn't like inline assembly */\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# if 0\r
-# define HEURISTIC1\r
-# undef STACK_GRAN\r
-# define STACK_GRAN 0x10000000\r
- /* STACKBOTTOM is usually 0xc0000000, but this changes with */\r
- /* different kernel configurations. In particular, systems */\r
- /* with 2GB physical memory will usually move the user */\r
- /* address space limit, and hence initial SP to 0x80000000. */\r
-# endif\r
-# if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)\r
-# define MPROTECT_VDB\r
-# else\r
- /* We seem to get random errors in incremental mode, */\r
- /* possibly because Linux threads is itself a malloc client */\r
- /* and can't deal with the signals. */\r
-# endif\r
-# define HEAP_START (ptr_t)0x1000\r
- /* This encourages mmap to give us low addresses, */\r
- /* thus allowing the heap to grow to ~3GB */\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# ifdef UNDEFINED /* includes ro data */\r
- extern int _etext[];\r
-# define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# include <features.h>\r
-# if defined(__GLIBC__) && __GLIBC__ >= 2\r
-# define SEARCH_FOR_DATA_START\r
-# else\r
- extern char **__environ;\r
-# define DATASTART ((ptr_t)(&__environ))\r
- /* hideous kludge: __environ is the first */\r
- /* word in crt0.o, and delimits the start */\r
- /* of the data segment, no matter which */\r
- /* ld options were passed through. */\r
- /* We could use _etext instead, but that */\r
- /* would include .rodata, which may */\r
- /* contain large read-only data tables */\r
- /* that we'd rather not scan. */\r
-# endif\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# else\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# ifdef USE_I686_PREFETCH\r
- /* FIXME: Thus should use __builtin_prefetch, but we'll leave that */\r
- /* for the next rtelease. */\r
-# define PREFETCH(x) \\r
- __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))\r
- /* Empirically prefetcht0 is much more effective at reducing */\r
- /* cache miss stalls for the targetted load instructions. But it */\r
- /* seems to interfere enough with other cache traffic that the net */\r
- /* result is worse than prefetchnta. */\r
-# if 0 \r
- /* Using prefetches for write seems to have a slight negative */\r
- /* impact on performance, at least for a PIII/500. */\r
-# define PREFETCH_FOR_WRITE(x) \\r
- __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))\r
-# endif\r
-# endif\r
-# ifdef USE_3DNOW_PREFETCH\r
-# define PREFETCH(x) \\r
- __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))\r
-# define PREFETCH_FOR_WRITE(x) \\r
- __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))\r
-# endif\r
-# endif\r
-# ifdef CYGWIN32\r
-# define OS_TYPE "CYGWIN32"\r
-# define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */\r
-# define DATAEND ((ptr_t)GC_DATAEND)\r
-# undef STACK_GRAN\r
-# define STACK_GRAN 0x10000\r
-# define HEURISTIC1\r
-# endif\r
-# ifdef OS2\r
-# define OS_TYPE "OS2"\r
- /* STACKBOTTOM and DATASTART are handled specially in */\r
- /* os_dep.c. OS2 actually has the right */\r
- /* system call! */\r
-# define DATAEND /* not needed */\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# ifdef MSWIN32\r
-# define OS_TYPE "MSWIN32"\r
- /* STACKBOTTOM and DATASTART are handled specially in */\r
- /* os_dep.c. */\r
-# ifndef __WATCOMC__\r
-# define MPROTECT_VDB\r
-# endif\r
-# define DATAEND /* not needed */\r
-# endif\r
-# ifdef MSWINCE\r
-# define OS_TYPE "MSWINCE"\r
-# define DATAEND /* not needed */\r
-# endif\r
-# ifdef DJGPP\r
-# define OS_TYPE "DJGPP"\r
-# include "stubinfo.h"\r
- extern int etext[];\r
- extern int _stklen;\r
- extern int __djgpp_stack_limit;\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))\r
-/* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \\r
- + _stklen)) */\r
-# define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))\r
- /* This may not be right. */\r
-# endif\r
-# ifdef OPENBSD\r
-# define OS_TYPE "OPENBSD"\r
-# endif\r
-# ifdef FREEBSD\r
-# define OS_TYPE "FREEBSD"\r
-# ifndef GC_FREEBSD_THREADS\r
-# define MPROTECT_VDB\r
-# endif\r
-# define SIG_SUSPEND SIGTSTP\r
-# define SIG_THR_RESTART SIGCONT\r
-# define FREEBSD_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
- extern char etext[];\r
- extern char * GC_FreeBSDGetDataStart();\r
-# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# endif\r
-# ifdef THREE86BSD\r
-# define OS_TYPE "THREE86BSD"\r
-# endif\r
-# ifdef BSDI\r
-# define OS_TYPE "BSDI"\r
-# endif\r
-# if defined(OPENBSD) || defined(NETBSD) \\r
- || defined(THREE86BSD) || defined(BSDI)\r
-# define HEURISTIC2\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# ifdef NEXT\r
-# define OS_TYPE "NEXT"\r
-# define DATASTART ((ptr_t) get_etext())\r
-# define STACKBOTTOM ((ptr_t)0xc0000000)\r
-# define DATAEND /* not needed */\r
-# endif\r
-# ifdef DOS4GW\r
-# define OS_TYPE "DOS4GW"\r
- extern long __nullarea;\r
- extern char _end;\r
- extern char *_STACKTOP;\r
- /* Depending on calling conventions Watcom C either precedes\r
- or does not precedes with undescore names of C-variables.\r
- Make sure startup code variables always have the same names. */\r
- #pragma aux __nullarea "*";\r
- #pragma aux _end "*";\r
-# define STACKBOTTOM ((ptr_t) _STACKTOP)\r
- /* confused? me too. */\r
-# define DATASTART ((ptr_t) &__nullarea)\r
-# define DATAEND ((ptr_t) &_end)\r
-# endif\r
-# ifdef HURD\r
-# define OS_TYPE "HURD"\r
-# define STACK_GROWS_DOWN\r
-# define HEURISTIC2\r
- extern int __data_start[];\r
-# define DATASTART ( (ptr_t) (__data_start))\r
- extern int _end[];\r
-# define DATAEND ( (ptr_t) (_end))\r
-/* # define MPROTECT_VDB Not quite working yet? */\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# endif\r
-\r
-# ifdef NS32K\r
-# define MACH_TYPE "NS32K"\r
-# define ALIGNMENT 4\r
- extern char **environ;\r
-# define DATASTART ((ptr_t)(&environ))\r
- /* hideous kludge: environ is the first */\r
- /* word in crt0.o, and delimits the start */\r
- /* of the data segment, no matter which */\r
- /* ld options were passed through. */\r
-# define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */\r
-# endif\r
-\r
-# ifdef MIPS\r
-# define MACH_TYPE "MIPS"\r
-# ifdef LINUX\r
- /* This was developed for a linuxce style platform. Probably */\r
- /* needs to be tweaked for workstation class machines. */\r
-# define OS_TYPE "LINUX"\r
-# define DYNAMIC_LOADING\r
- extern int _end[];\r
-# define DATAEND (_end)\r
- extern int __data_start[];\r
-# define DATASTART ((ptr_t)(__data_start))\r
-# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# else\r
-# define ALIGNMENT 4\r
-# endif\r
-# define USE_GENERIC_PUSH_REGS\r
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2\r
-# define LINUX_STACKBOTTOM\r
-# else\r
-# define STACKBOTTOM 0x80000000\r
-# endif\r
-# endif /* Linux */\r
-# ifdef EWS4800\r
-# define HEURISTIC2\r
-# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)\r
- extern int _fdata[], _end[];\r
-# define DATASTART ((ptr_t)_fdata)\r
-# define DATAEND ((ptr_t)_end)\r
-# define CPP_WORDSZ _MIPS_SZPTR\r
-# define ALIGNMENT (_MIPS_SZPTR/8)\r
-# else\r
- extern int etext[], edata[], end[];\r
- extern int _DYNAMIC_LINKING[], _gp[];\r
-# define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \\r
- + ((word)etext & 0xffff)))\r
-# define DATAEND (edata)\r
-# define DATASTART2 (_DYNAMIC_LINKING \\r
- ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \\r
- : (ptr_t)edata)\r
-# define DATAEND2 (end)\r
-# define ALIGNMENT 4\r
-# endif\r
-# define OS_TYPE "EWS4800"\r
-# define USE_GENERIC_PUSH_REGS 1\r
-# endif\r
-# ifdef ULTRIX\r
-# define HEURISTIC2\r
-# define DATASTART (ptr_t)0x10000000\r
- /* Could probably be slightly higher since */\r
- /* startup code allocates lots of stuff. */\r
-# define OS_TYPE "ULTRIX"\r
-# define ALIGNMENT 4\r
-# endif\r
-# ifdef RISCOS\r
-# define HEURISTIC2\r
-# define DATASTART (ptr_t)0x10000000\r
-# define OS_TYPE "RISCOS"\r
-# define ALIGNMENT 4 /* Required by hardware */\r
-# endif\r
-# ifdef IRIX5\r
-# define HEURISTIC2\r
- extern int _fdata[];\r
-# define DATASTART ((ptr_t)(_fdata))\r
-# ifdef USE_MMAP\r
-# define HEAP_START (ptr_t)0x30000000\r
-# else\r
-# define HEAP_START DATASTART\r
-# endif\r
- /* Lowest plausible heap address. */\r
- /* In the MMAP case, we map there. */\r
- /* In either case it is used to identify */\r
- /* heap sections so they're not */\r
- /* considered as roots. */\r
-# define OS_TYPE "IRIX5"\r
-/*# define MPROTECT_VDB DOB: this should work, but there is evidence */\r
-/* of recent breakage. */\r
-# ifdef _MIPS_SZPTR\r
-# define CPP_WORDSZ _MIPS_SZPTR\r
-# define ALIGNMENT (_MIPS_SZPTR/8)\r
-# if CPP_WORDSZ != 64\r
-# define ALIGN_DOUBLE\r
-# endif\r
-# else\r
-# define ALIGNMENT 4\r
-# define ALIGN_DOUBLE\r
-# endif\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef MSWINCE\r
-# define OS_TYPE "MSWINCE"\r
-# define ALIGNMENT 4\r
-# define DATAEND /* not needed */\r
-# endif\r
-# if defined(NETBSD)\r
-# define ALIGNMENT 4\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# define USE_GENERIC_PUSH_REGS\r
-# ifdef __ELF__\r
- extern int etext[];\r
-# define DATASTART GC_data_start\r
-# define NEED_FIND_LIMIT\r
-# define DYNAMIC_LOADING\r
-# else\r
-# define DATASTART ((ptr_t) 0x10000000)\r
-# define STACKBOTTOM ((ptr_t) 0x7ffff000)\r
-# endif /* _ELF_ */\r
-# endif\r
-# endif\r
-\r
-# ifdef RS6000\r
-# define MACH_TYPE "RS6000"\r
-# ifdef ALIGNMENT\r
-# undef ALIGNMENT\r
-# endif\r
-# ifdef IA64\r
-# undef IA64 /* DOB: some AIX installs stupidly define IA64 in /usr/include/sys/systemcfg.h */\r
-# endif\r
-# ifdef __64BIT__\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# define STACKBOTTOM ((ptr_t)0x1000000000000000)\r
-# else\r
-# define ALIGNMENT 4\r
-# define CPP_WORDSZ 32\r
-# define STACKBOTTOM ((ptr_t)((ulong)&errno))\r
-# endif\r
-# define USE_MMAP\r
-# define USE_MMAP_ANON\r
- /* From AIX linker man page:\r
- _text Specifies the first location of the program.\r
- _etext Specifies the first location after the program.\r
- _data Specifies the first location of the data.\r
- _edata Specifies the first location after the initialized data\r
- _end or end Specifies the first location after all data.\r
- */\r
- extern int _data[], _end[];\r
-# define DATASTART ((ptr_t)((ulong)_data))\r
-# define DATAEND ((ptr_t)((ulong)_end))\r
- extern int errno;\r
-# define USE_GENERIC_PUSH_REGS\r
-# define DYNAMIC_LOADING\r
- /* For really old versions of AIX, this may have to be removed. */\r
-# endif\r
-\r
-# ifdef HP_PA\r
-# define MACH_TYPE "HP_PA"\r
-# ifdef __LP64__\r
-# define CPP_WORDSZ 64\r
-# define ALIGNMENT 8\r
-# else\r
-# define CPP_WORDSZ 32\r
-# define ALIGNMENT 4\r
-# define ALIGN_DOUBLE\r
-# endif\r
-# if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)\r
-# ifndef LINUX /* For now. */\r
-# define MPROTECT_VDB\r
-# endif\r
-# else\r
-# define GENERIC_COMPARE_AND_SWAP\r
- /* No compare-and-swap instruction. Use pthread mutexes */\r
- /* when we absolutely have to. */\r
-# ifdef PARALLEL_MARK\r
-# define USE_MARK_BYTES\r
- /* Minimize compare-and-swap usage. */\r
-# endif\r
-# endif\r
-# define STACK_GROWS_UP\r
-# ifdef HPUX\r
-# define OS_TYPE "HPUX"\r
- extern int __data_start[];\r
-# define DATASTART ((ptr_t)(__data_start))\r
-# if 0\r
- /* The following appears to work for 7xx systems running HP/UX */\r
- /* 9.xx Furthermore, it might result in much faster */\r
- /* collections than HEURISTIC2, which may involve scanning */\r
- /* segments that directly precede the stack. It is not the */\r
- /* default, since it may not work on older machine/OS */\r
- /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */\r
- /* this.) */\r
-# define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */\r
-# else\r
- /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */\r
- /* to this. Note that the GC must be initialized before the */\r
- /* first putenv call. */\r
- extern char ** environ;\r
-# define STACKBOTTOM ((ptr_t)environ)\r
-# endif\r
-# define DYNAMIC_LOADING\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)\r
-# ifndef __GNUC__\r
-# define PREFETCH(x) { \\r
- register long addr = (long)(x); \\r
- (void) _asm ("LDW", 0, 0, addr, 0); \\r
- }\r
-# endif\r
-# endif /* HPUX */\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# define DYNAMIC_LOADING\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (&_end)\r
-# endif /* LINUX */\r
-# endif /* HP_PA */\r
-\r
-# ifdef ALPHA\r
-# define MACH_TYPE "ALPHA"\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# ifndef LINUX\r
-# define USE_GENERIC_PUSH_REGS\r
- /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */\r
- /* fp registers in some cases when the target is a 21264. The assembly */\r
- /* code doesn't handle that yet, and version dependencies make that a */\r
- /* bit tricky. Do the easy thing for now. */\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# define DATASTART GC_data_start\r
-# define ELFCLASS32 32\r
-# define ELFCLASS64 64\r
-# define ELF_CLASS ELFCLASS64\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef OPENBSD\r
-# define OS_TYPE "OPENBSD"\r
-# define HEURISTIC2\r
-# ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */\r
-# define DATASTART GC_data_start\r
-# define ELFCLASS32 32\r
-# define ELFCLASS64 64\r
-# define ELF_CLASS ELFCLASS64\r
-# else /* ECOFF, until OpenBSD/Alpha 2.7 */\r
-# define DATASTART ((ptr_t) 0x140000000)\r
-# endif\r
-# endif\r
-# ifdef FREEBSD\r
-# define OS_TYPE "FREEBSD"\r
-/* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */\r
-# define SIG_SUSPEND SIGTSTP\r
-# define SIG_THR_RESTART SIGCONT\r
-# define FREEBSD_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
-/* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */\r
- extern char etext[];\r
- extern char edata[];\r
- extern char end[];\r
-# define NEED_FIND_LIMIT\r
-# define DATASTART ((ptr_t)(&etext))\r
-# define DATAEND (GC_find_limit (DATASTART, TRUE))\r
-# define DATASTART2 ((ptr_t)(&edata))\r
-# define DATAEND2 ((ptr_t)(&end))\r
-# endif\r
-# ifdef OSF1\r
-# define OS_TYPE "OSF1"\r
-# define DATASTART ((ptr_t) 0x140000000)\r
- extern int _end[];\r
-# define DATAEND ((ptr_t) &_end)\r
- extern char ** environ;\r
- /* round up from the value of environ to the nearest page boundary */\r
- /* Probably breaks if putenv is called before collector */\r
- /* initialization. */\r
-# define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))\r
-/* # define HEURISTIC2 */\r
- /* Normally HEURISTIC2 is too conervative, since */\r
- /* the text segment immediately follows the stack. */\r
- /* Hence we give an upper pound. */\r
- /* This is currently unused, since we disabled HEURISTIC2 */\r
- extern int __start[];\r
-# define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))\r
-# ifndef GC_OSF1_THREADS\r
- /* Unresolved signal issues with threads. */\r
-# define MPROTECT_VDB\r
-# endif\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define SEARCH_FOR_DATA_START\r
-# define DYNAMIC_LOADING\r
-# else\r
-# define DATASTART ((ptr_t) 0x140000000)\r
-# endif\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# define MPROTECT_VDB\r
- /* Has only been superficially tested. May not */\r
- /* work on all versions. */\r
-# endif\r
-# endif\r
-\r
-# ifdef IA64\r
-# define MACH_TYPE "IA64"\r
-# define USE_GENERIC_PUSH_REGS\r
- /* We need to get preserved registers in addition to register */\r
- /* windows. That's easiest to do with setjmp. */\r
-# ifdef PARALLEL_MARK\r
-# define USE_MARK_BYTES\r
- /* Compare-and-exchange is too expensive to use for */\r
- /* setting mark bits. */\r
-# endif\r
-# ifdef HPUX\r
-# ifdef _ILP32\r
-# define CPP_WORDSZ 32\r
-# define ALIGN_DOUBLE\r
- /* Requires 8 byte alignment for malloc */\r
-# define ALIGNMENT 4\r
-# else\r
-# ifndef _LP64\r
- ---> unknown ABI\r
-# endif\r
-# define CPP_WORDSZ 64\r
-# define ALIGN_DOUBLE\r
- /* Requires 16 byte alignment for malloc */\r
-# define ALIGNMENT 8\r
-# endif\r
-# define OS_TYPE "HPUX" \r
- extern int __data_start[];\r
-# define DATASTART ((ptr_t)(__data_start))\r
- /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */\r
- /* to this. Note that the GC must be initialized before the */\r
- /* first putenv call. */\r
- extern char ** environ;\r
-# define STACKBOTTOM ((ptr_t)environ)\r
-# define HPUX_STACKBOTTOM\r
-# define DYNAMIC_LOADING\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)\r
- /* The following was empirically determined, and is probably */\r
- /* not very robust. */\r
- /* Note that the backing store base seems to be at a nice */\r
- /* address minus one page. */\r
-# define BACKING_STORE_DISPLACEMENT 0x1000000\r
-# define BACKING_STORE_ALIGNMENT 0x1000\r
- extern ptr_t GC_register_stackbottom;\r
-# define BACKING_STORE_BASE GC_register_stackbottom\r
- /* Known to be wrong for recent HP/UX versions!!! */\r
-# endif\r
-# ifdef LINUX\r
-# define CPP_WORDSZ 64\r
-# define ALIGN_DOUBLE\r
- /* Requires 16 byte alignment for malloc */\r
-# define ALIGNMENT 8\r
-# define OS_TYPE "LINUX"\r
- /* The following works on NUE and older kernels: */\r
-/* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */\r
- /* This does not work on NUE: */\r
-# define LINUX_STACKBOTTOM\r
- /* We also need the base address of the register stack */\r
- /* backing store. This is computed in */\r
- /* GC_linux_register_stack_base based on the following */\r
- /* constants: */\r
-# define BACKING_STORE_ALIGNMENT 0x100000\r
-# define BACKING_STORE_DISPLACEMENT 0x80000000\r
- extern ptr_t GC_register_stackbottom;\r
-# define BACKING_STORE_BASE GC_register_stackbottom\r
-# define SEARCH_FOR_DATA_START\r
-# ifdef __GNUC__\r
-# define DYNAMIC_LOADING\r
-# else\r
- /* In the Intel compiler environment, we seem to end up with */\r
- /* statically linked executables and an undefined reference */\r
- /* to _DYNAMIC */\r
-# endif\r
-# define MPROTECT_VDB\r
- /* Requires Linux 2.3.47 or later. */\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# ifdef __GNUC__\r
-# ifndef __INTEL_COMPILER\r
-# define PREFETCH(x) \\r
- __asm__ (" lfetch [%0]": : "r"(x))\r
-# define PREFETCH_FOR_WRITE(x) \\r
- __asm__ (" lfetch.excl [%0]": : "r"(x))\r
-# define CLEAR_DOUBLE(x) \\r
- __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))\r
-# else\r
-# include <ia64intrin.h>\r
-# define PREFETCH(x) \\r
- __lfetch(__lfhint_none, (x))\r
-# define PREFETCH_FOR_WRITE(x) \\r
- __lfetch(__lfhint_nta, (x))\r
-# define CLEAR_DOUBLE(x) \\r
- __stf_spill((void *)(x), 0)\r
-# endif // __INTEL_COMPILER\r
-# endif\r
-# endif\r
-# ifdef MSWIN32\r
- /* FIXME: This is a very partial guess. There is no port, yet. */\r
-# define OS_TYPE "MSWIN32"\r
- /* STACKBOTTOM and DATASTART are handled specially in */\r
- /* os_dep.c. */\r
-# define DATAEND /* not needed */\r
-# if defined(_WIN64)\r
-# define CPP_WORDSZ 64\r
-# else\r
-# define CPP_WORDSZ 32 /* Is this possible? */\r
-# endif\r
-# define ALIGNMENT 8\r
-# endif\r
-# endif\r
-\r
-# ifdef M88K\r
-# define MACH_TYPE "M88K"\r
-# define ALIGNMENT 4\r
-# define ALIGN_DOUBLE\r
- extern int etext[];\r
-# ifdef CX_UX\r
-# define OS_TYPE "CX_UX"\r
-# define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)\r
-# endif\r
-# ifdef DGUX\r
-# define OS_TYPE "DGUX"\r
- extern ptr_t GC_SysVGetDataStart();\r
-# define DATASTART GC_SysVGetDataStart(0x10000, etext)\r
-# endif\r
-# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */\r
-# endif\r
-\r
-# ifdef S370\r
- /* If this still works, and if anyone cares, this should probably */\r
- /* be moved to the S390 category. */\r
-# define MACH_TYPE "S370"\r
-# define ALIGNMENT 4 /* Required by hardware */\r
-# define USE_GENERIC_PUSH_REGS\r
-# ifdef UTS4\r
-# define OS_TYPE "UTS4"\r
- extern int etext[];\r
- extern int _etext[];\r
- extern int _end[];\r
- extern ptr_t GC_SysVGetDataStart();\r
-# define DATASTART GC_SysVGetDataStart(0x10000, _etext)\r
-# define DATAEND (_end)\r
-# define HEURISTIC2\r
-# endif\r
-# endif\r
-\r
-# ifdef S390\r
-# define MACH_TYPE "S390"\r
-# define USE_GENERIC_PUSH_REGS\r
-# ifndef __s390x__\r
-# define ALIGNMENT 4\r
-# define CPP_WORDSZ 32\r
-# else\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# endif\r
-# ifndef HBLKSIZE\r
-# define HBLKSIZE 4096\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# define DYNAMIC_LOADING\r
- extern int __data_start[];\r
-# define DATASTART ((ptr_t)(__data_start))\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# define CACHE_LINE_SIZE 256\r
-# define GETPAGESIZE() 4096\r
-# endif\r
-# endif\r
-\r
-# if defined(PJ)\r
-# define ALIGNMENT 4\r
- extern int _etext[];\r
-# define DATASTART ((ptr_t)(_etext))\r
-# define HEURISTIC1\r
-# endif\r
-\r
-# ifdef ARM32\r
-# define CPP_WORDSZ 32\r
-# define MACH_TYPE "ARM32"\r
-# define ALIGNMENT 4\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# ifdef __ELF__\r
-# define DATASTART GC_data_start\r
-# define DYNAMIC_LOADING\r
-# else\r
- extern char etext[];\r
-# define DATASTART ((ptr_t)(etext))\r
-# endif\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# undef STACK_GRAN\r
-# define STACK_GRAN 0x10000000\r
-# define USE_GENERIC_PUSH_REGS\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# include <features.h>\r
-# if defined(__GLIBC__) && __GLIBC__ >= 2\r
-# define SEARCH_FOR_DATA_START\r
-# elif defined(PLATFORM_ANDROID)\r
-# define SEARCH_FOR_DATA_START\r
-# else\r
- extern char **__environ;\r
-# define DATASTART ((ptr_t)(&__environ))\r
- /* hideous kludge: __environ is the first */\r
- /* word in crt0.o, and delimits the start */\r
- /* of the data segment, no matter which */\r
- /* ld options were passed through. */\r
- /* We could use _etext instead, but that */\r
- /* would include .rodata, which may */\r
- /* contain large read-only data tables */\r
- /* that we'd rather not scan. */\r
-# endif\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# else\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# endif\r
-# ifdef MSWINCE\r
-# define OS_TYPE "MSWINCE"\r
-# define DATAEND /* not needed */\r
-# endif\r
-# ifdef DARWIN\r
-# define OS_TYPE "DARWIN"\r
-# define DATASTART ((ptr_t) get_etext())\r
-# define DATAEND ((ptr_t) get_end())\r
-# define STACKBOTTOM ((ptr_t) 0x30000000)\r
-# define USE_MMAP\r
-# define USE_MMAP_ANON\r
-# define USE_MUNMAP\r
-# endif\r
-# ifdef NOSYS\r
- /* __data_start is usually defined in the target linker script. */\r
- extern int __data_start[];\r
-# define DATASTART (ptr_t)(__data_start)\r
-# define USE_GENERIC_PUSH_REGS\r
- /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */\r
- extern void *__stack_base__;\r
-# define STACKBOTTOM ((ptr_t) (__stack_base__))\r
-# endif\r
-#endif\r
-\r
-# ifdef CRIS\r
-# define MACH_TYPE "CRIS"\r
-# define CPP_WORDSZ 32\r
-# define ALIGNMENT 1\r
-# define OS_TYPE "LINUX"\r
-# define DYNAMIC_LOADING\r
-# define LINUX_STACKBOTTOM\r
-# define USE_GENERIC_PUSH_REGS\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# endif\r
-\r
-# ifdef SH\r
-# define MACH_TYPE "SH"\r
-# define ALIGNMENT 4\r
-# ifdef MSWINCE\r
-# define OS_TYPE "MSWINCE"\r
-# define DATAEND /* not needed */\r
-# endif\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# define USE_GENERIC_PUSH_REGS\r
-# define DYNAMIC_LOADING\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# define HEURISTIC2\r
-# define DATASTART GC_data_start\r
-# define USE_GENERIC_PUSH_REGS\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# endif\r
- \r
-# ifdef SH4\r
-# define MACH_TYPE "SH4"\r
-# define OS_TYPE "MSWINCE"\r
-# define ALIGNMENT 4\r
-# define DATAEND /* not needed */\r
-# endif\r
-\r
-# ifdef M32R\r
-# define CPP_WORDSZ 32\r
-# define MACH_TYPE "M32R"\r
-# define ALIGNMENT 4\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# undef STACK_GRAN\r
-# define STACK_GRAN 0x10000000\r
-# define USE_GENERIC_PUSH_REGS\r
-# define DYNAMIC_LOADING\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# endif\r
-# endif\r
-\r
-# ifdef X86_64\r
-# define MACH_TYPE "X86_64"\r
-# define ALIGNMENT 8\r
-# define CPP_WORDSZ 64\r
-# ifndef HBLKSIZE\r
-# define HBLKSIZE 4096\r
-# endif\r
-# define CACHE_LINE_SIZE 64\r
-# define USE_GENERIC_PUSH_REGS\r
-# ifdef LINUX\r
-# define OS_TYPE "LINUX"\r
-# define LINUX_STACKBOTTOM\r
-# ifndef USE_MMAP\r
-# define FALLBACK_TO_MMAP\r
-# endif\r
-# if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)\r
-# define MPROTECT_VDB\r
-# else\r
- /* We seem to get random errors in incremental mode, */\r
- /* possibly because Linux threads is itself a malloc client */\r
- /* and can't deal with the signals. */\r
-# endif\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# ifdef UNDEFINED /* includes ro data */\r
- extern int _etext[];\r
-# define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# include <features.h>\r
-# define SEARCH_FOR_DATA_START\r
- extern int _end[];\r
-# define DATAEND (_end)\r
-# else\r
- extern int etext[];\r
-# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))\r
-# endif\r
-# if defined(__GNUC__) && __GNUC >= 3\r
-# define PREFETCH(x) __builtin_prefetch((x), 0, 0)\r
-# define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1)\r
-# endif\r
-# endif\r
-# ifdef FREEBSD\r
-# define OS_TYPE "FREEBSD"\r
-# ifndef GC_FREEBSD_THREADS\r
-# define MPROTECT_VDB\r
-# endif\r
-# define SIG_SUSPEND SIGTSTP\r
-# define SIG_THR_RESTART SIGCONT\r
-# define NEED_FIND_LIMIT\r
-# define FREEBSD_STACKBOTTOM\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
- extern char etext[];\r
- extern char * GC_FreeBSDGetDataStart();\r
-# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)\r
-# endif\r
-# ifdef NETBSD\r
-# define OS_TYPE "NETBSD"\r
-# ifdef __ELF__\r
-# define DYNAMIC_LOADING\r
-# endif\r
-# define HEURISTIC2\r
- extern char etext[];\r
-# define SEARCH_FOR_DATA_START\r
-# endif\r
-# endif\r
-\r
-#if defined(LINUX) && defined(USE_MMAP)\r
- /* The kernel may do a somewhat better job merging mappings etc. */\r
- /* with anonymous mappings. */\r
-# define USE_MMAP_ANON\r
-#endif\r
-\r
-#if defined(LINUX) && defined(REDIRECT_MALLOC)\r
- /* Rld appears to allocate some memory with its own allocator, and */\r
- /* some through malloc, which might be redirected. To make this */\r
- /* work with collectable memory, we have to scan memory allocated */\r
- /* by rld's internal malloc. */\r
-# define USE_PROC_FOR_LIBRARIES\r
-#endif\r
- \r
-# ifndef STACK_GROWS_UP\r
-# define STACK_GROWS_DOWN\r
-# endif\r
-\r
-# ifndef CPP_WORDSZ\r
-# define CPP_WORDSZ 32\r
-# endif\r
-\r
-# ifndef OS_TYPE\r
-# define OS_TYPE ""\r
-# endif\r
-\r
-# ifndef DATAEND\r
- extern int end[];\r
-# define DATAEND (end)\r
-# endif\r
-\r
-# if defined(SVR4) && !defined(GETPAGESIZE)\r
-# include <unistd.h>\r
-# define GETPAGESIZE() sysconf(_SC_PAGESIZE)\r
-# endif\r
-\r
-# ifndef GETPAGESIZE\r
-# if defined(SUNOS5) || defined(IRIX5)\r
-# include <unistd.h>\r
-# endif\r
-# define GETPAGESIZE() getpagesize()\r
-# endif\r
-\r
-# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)\r
- /* OS has SVR4 generic features. Probably others also qualify. */\r
-# define SVR4\r
-# endif\r
-\r
-# if defined(SUNOS5) || defined(DRSNX)\r
- /* OS has SUNOS5 style semi-undocumented interface to dynamic */\r
- /* loader. */\r
-# define SUNOS5DL\r
- /* OS has SUNOS5 style signal handlers. */\r
-# define SUNOS5SIGS\r
-# endif\r
-\r
-# if defined(HPUX)\r
-# define SUNOS5SIGS\r
-# endif\r
-\r
-# if defined(FREEBSD) && (__FreeBSD__ >= 4)\r
-# define SUNOS5SIGS\r
-# endif\r
-\r
-# if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \\r
- || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \\r
- || defined(DGUX) || defined(BSD) || defined(SUNOS4) \\r
- || defined(_AIX) || defined(DARWIN) || defined(OSF1)\r
-# define UNIX_LIKE /* Basic Unix-like system calls work. */\r
-# endif\r
-\r
-# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64\r
- -> bad word size\r
-# endif\r
-\r
-# ifdef PCR\r
-# undef DYNAMIC_LOADING\r
-# undef STACKBOTTOM\r
-# undef HEURISTIC1\r
-# undef HEURISTIC2\r
-# undef PROC_VDB\r
-# undef MPROTECT_VDB\r
-# define PCR_VDB\r
-# endif\r
-\r
-# ifdef SRC_M3\r
- /* Postponed for now. */\r
-# undef PROC_VDB\r
-# undef MPROTECT_VDB\r
-# endif\r
-\r
-# ifdef SMALL_CONFIG\r
- /* Presumably not worth the space it takes. */\r
-# undef PROC_VDB\r
-# undef MPROTECT_VDB\r
-# endif\r
-\r
-# ifdef USE_MUNMAP\r
-# undef MPROTECT_VDB /* Can't deal with address space holes. */\r
-# endif\r
-\r
-# ifdef PARALLEL_MARK\r
-# undef MPROTECT_VDB /* For now. */\r
-# endif\r
-\r
-# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)\r
-# define DEFAULT_VDB\r
-# endif\r
-\r
-# ifndef PREFETCH\r
-# define PREFETCH(x)\r
-# define NO_PREFETCH\r
-# endif\r
-\r
-# ifndef PREFETCH_FOR_WRITE\r
-# define PREFETCH_FOR_WRITE(x)\r
-# define NO_PREFETCH_FOR_WRITE\r
-# endif\r
-\r
-# ifndef CACHE_LINE_SIZE\r
-# define CACHE_LINE_SIZE 32 /* Wild guess */\r
-# endif\r
-\r
-# ifdef LINUX\r
-# define REGISTER_LIBRARIES_EARLY\r
- /* We sometimes use dl_iterate_phdr, which may acquire an internal */\r
- /* lock. This isn't safe after the world has stopped. So we must */\r
- /* call GC_register_dynamic_libraries before stopping the world. */\r
- /* For performance reasons, this may be beneficial on other */\r
- /* platforms as well, though it should be avoided in win32. */\r
-# endif /* LINUX */\r
-\r
-# if defined(SEARCH_FOR_DATA_START)\r
- extern ptr_t GC_data_start;\r
-# define DATASTART GC_data_start\r
-# endif\r
-\r
-# ifndef CLEAR_DOUBLE\r
-# define CLEAR_DOUBLE(x) \\r
- ((word*)x)[0] = 0; \\r
- ((word*)x)[1] = 0;\r
-# endif /* CLEAR_DOUBLE */\r
-\r
- /* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */\r
-# if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS)\r
-# define GC_SOLARIS_THREADS\r
-# endif\r
-\r
-# if defined(GC_IRIX_THREADS) && !defined(IRIX5)\r
- --> inconsistent configuration\r
-# endif\r
-# if defined(GC_LINUX_THREADS) && !defined(LINUX)\r
- --> inconsistent configuration\r
-# endif\r
-# if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)\r
- --> inconsistent configuration\r
-# endif\r
-# if defined(GC_HPUX_THREADS) && !defined(HPUX)\r
- --> inconsistent configuration\r
-# endif\r
-# if defined(GC_AIX_THREADS) && !defined(_AIX)\r
- --> inconsistent configuration\r
-# endif\r
-# if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32)\r
- --> inconsistent configuration\r
-# endif\r
-\r
-# if defined(PCR) || defined(SRC_M3) || \\r
- defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \\r
- defined(GC_PTHREADS) || defined(SN_TARGET_PS3)\r
-# define THREADS\r
-# endif\r
-\r
-# if defined(HP_PA) || defined(M88K) \\r
- || defined(POWERPC) && !defined(DARWIN) \\r
- || defined(LINT) || defined(MSWINCE) || defined(ARM32) || defined(CRIS) \\r
- || (defined(I386) && defined(__LCC__))\r
- /* Use setjmp based hack to mark from callee-save registers. */\r
- /* The define should move to the individual platform */\r
- /* descriptions. */\r
-# define USE_GENERIC_PUSH_REGS\r
-# endif\r
-\r
-# if defined(MSWINCE)\r
-# define NO_GETENV\r
-# endif\r
-\r
-# if defined(SPARC)\r
-# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */\r
- /* include assembly code to do it well. */\r
-# endif\r
-\r
- /* Can we save call chain in objects for debugging? */\r
- /* SET NFRAMES (# of saved frames) and NARGS (#of args for each */\r
- /* frame) to reasonable values for the platform. */\r
- /* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified */\r
- /* at build time, though we feel free to adjust it slightly. */\r
- /* Define NEED_CALLINFO if we either save the call stack or */\r
- /* GC_ADD_CALLER is defined. */\r
- /* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */\r
-\r
-#if defined(SPARC)\r
-# define CAN_SAVE_CALL_ARGS\r
-#endif\r
-#if (defined(I386) || defined(X86_64)) && defined(LINUX)\r
- /* SAVE_CALL_CHAIN is supported if the code is compiled to save */\r
- /* frame pointers by default, i.e. no -fomit-frame-pointer flag. */\r
-# define CAN_SAVE_CALL_ARGS\r
-#endif\r
-\r
-# if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \\r
- && defined(GC_CAN_SAVE_CALL_STACKS)\r
-# define SAVE_CALL_CHAIN \r
-# endif\r
-# ifdef SAVE_CALL_CHAIN\r
-# if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)\r
-# define NARGS SAVE_CALL_NARGS\r
-# else\r
-# define NARGS 0 /* Number of arguments to save for each call. */\r
-# endif\r
-# endif\r
-# ifdef SAVE_CALL_CHAIN\r
-# ifndef SAVE_CALL_COUNT\r
-# define NFRAMES 6 /* Number of frames to save. Even for */\r
- /* alignment reasons. */\r
-# else\r
-# define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)\r
-# endif\r
-# define NEED_CALLINFO\r
-# endif /* SAVE_CALL_CHAIN */\r
-# ifdef GC_ADD_CALLER\r
-# define NFRAMES 1\r
-# define NARGS 0\r
-# define NEED_CALLINFO\r
-# endif\r
-\r
-# if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)\r
-# define DBG_HDRS_ALL\r
-# endif\r
-\r
-# if defined(POINTER_MASK) && !defined(POINTER_SHIFT)\r
-# define POINTER_SHIFT 0\r
-# endif\r
-\r
-# if defined(POINTER_SHIFT) && !defined(POINTER_MASK)\r
-# define POINTER_MASK ((GC_word)(-1))\r
-# endif\r
-\r
-# if !defined(FIXUP_POINTER) && defined(POINTER_MASK)\r
-# define FIXUP_POINTER(p) (p) = ((p) & (POINTER_MASK) << POINTER_SHIFT)\r
-# endif\r
-\r
-# if defined(FIXUP_POINTER)\r
-# define NEED_FIXUP_POINTER 1\r
-# else\r
-# define NEED_FIXUP_POINTER 0\r
-# define FIXUP_POINTER(p)\r
-# endif\r
-\r
-#ifdef GC_PRIVATE_H\r
- /* This relies on some type definitions from gc_priv.h, from */\r
- /* where it's normally included. */\r
- /* */\r
- /* How to get heap memory from the OS: */\r
- /* Note that sbrk()-like allocation is preferred, since it */\r
- /* usually makes it possible to merge consecutively allocated */\r
- /* chunks. It also avoids unintented recursion with */\r
- /* -DREDIRECT_MALLOC. */\r
- /* GET_MEM() returns a HLKSIZE aligned chunk. */\r
- /* 0 is taken to mean failure. */\r
- /* In the case os USE_MMAP, the argument must also be a */\r
- /* physical page size. */\r
- /* GET_MEM is currently not assumed to retrieve 0 filled space, */\r
- /* though we should perhaps take advantage of the case in which */\r
- /* does. */\r
- struct hblk; /* See gc_priv.h. */\r
-# ifdef PCR\r
- char * real_malloc();\r
-# define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \\r
- + GC_page_size-1)\r
-# else\r
-# ifdef OS2\r
- void * os2_alloc(size_t bytes);\r
-# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \\r
- + GC_page_size) \\r
- + GC_page_size-1)\r
-# else\r
-# if defined(NEXT) || defined(DOS4GW) || \\r
- (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \\r
- (defined(SUNOS5) && !defined(USE_MMAP))\r
-# define GET_MEM(bytes) HBLKPTR((size_t) \\r
- calloc(1, (size_t)bytes + GC_page_size) \\r
- + GC_page_size-1)\r
-# else\r
-# ifdef MSWIN32\r
- extern ptr_t GC_win32_get_mem();\r
-# define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)\r
-# else\r
-# ifdef MACOS\r
-# if defined(USE_TEMPORARY_MEMORY)\r
- extern Ptr GC_MacTemporaryNewPtr(size_t size,\r
- Boolean clearMemory);\r
-# define GET_MEM(bytes) HBLKPTR( \\r
- GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \\r
- + GC_page_size-1)\r
-# else\r
-# define GET_MEM(bytes) HBLKPTR( \\r
- NewPtrClear(bytes + GC_page_size) + GC_page_size-1)\r
-# endif\r
-# else\r
-# ifdef MSWINCE\r
- extern ptr_t GC_wince_get_mem();\r
-# define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)\r
-# else\r
-# if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)\r
- extern void *GC_amiga_get_mem(size_t size);\r
-# define GET_MEM(bytes) HBLKPTR((size_t) \\r
- GC_amiga_get_mem((size_t)bytes + GC_page_size) \\r
- + GC_page_size-1)\r
-# else\r
-# if defined(SN_TARGET_PS3)\r
- extern void *ps3_get_mem (size_t size);\r
-# define GET_MEM(bytes) (struct hblk*) ps3_get_mem (bytes)\r
-# else\r
- extern ptr_t GC_unix_get_mem();\r
-# define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)\r
-#endif\r
-# endif\r
-# endif\r
-# endif\r
-# endif\r
-# endif\r
-# endif\r
-# endif\r
-\r
-#endif /* GC_PRIVATE_H */\r
-\r
-#if defined(_AIX) && !defined(__GNUC__) && !defined(__STDC__)\r
- /* IBMs xlc compiler doesn't appear to follow the convention of */\r
- /* defining __STDC__ to be zero in extended mode. */\r
-# define __STDC__ 0\r
-#endif\r
-\r
-# endif /* GCCONFIG_H */\r
+/*
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+ * Copyright (c) 1996 by Silicon Graphics. All rights reserved.
+ * Copyright (c) 2000-2004 Hewlett-Packard Development Company, L.P.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+/*
+ * This header is private to the gc. It is almost always included from
+ * gc_priv.h. However it is possible to include it by itself if just the
+ * configuration macros are needed. In that
+ * case, a few declarations relying on types declared in gc_priv.h will be
+ * omitted.
+ */
+
+#ifndef GCCONFIG_H
+
+# define GCCONFIG_H
+
+# ifndef GC_PRIVATE_H
+ /* Fake ptr_t declaration, just to avoid compilation errors. */
+ /* This avoids many instances if "ifndef GC_PRIVATE_H" below. */
+ typedef struct GC_undefined_struct * ptr_t;
+# endif
+
+/* Machine dependent parameters. Some tuning parameters can be found */
+/* near the top of gc_private.h. */
+
+/* Machine specific parts contributed by various people. See README file. */
+
+/* First a unified test for Linux: */
+# if defined(linux) || defined(__linux__)
+# ifndef LINUX
+# define LINUX
+# endif
+# endif
+
+/* And one for NetBSD: */
+# if defined(__NetBSD__)
+# define NETBSD
+# endif
+
+/* And one for OpenBSD: */
+# if defined(__OpenBSD__)
+# define OPENBSD
+# endif
+
+/* And one for FreeBSD: */
+# if defined(__FreeBSD__) && !defined(FREEBSD)
+# define FREEBSD
+# endif
+
+/* And one for Darwin: */
+# if defined(macosx) || (defined(__APPLE__) && defined(__MACH__))
+# define DARWIN
+# endif
+
+/* Determine the machine type: */
+# if defined(__native_client__)
+# define NACL
+# define I386
+# define mach_type_known
+# endif
+# if defined(__arm__) || defined(__thumb__)
+# define ARM32
+# if !defined(LINUX) && !defined(NETBSD) && !defined(DARWIN)
+# define NOSYS
+# define mach_type_known
+# endif
+# endif
+# if defined(sun) && defined(mc68000)
+# define M68K
+# define SUNOS4
+# define mach_type_known
+# endif
+# if defined(hp9000s300)
+# define M68K
+# define HP
+# define mach_type_known
+# endif
+# if defined(OPENBSD) && defined(m68k)
+# define M68K
+# define mach_type_known
+# endif
+# if defined(OPENBSD) && defined(__sparc__)
+# define SPARC
+# define mach_type_known
+# endif
+# if defined(NETBSD) && (defined(m68k) || defined(__m68k__))
+# define M68K
+# define mach_type_known
+# endif
+# if defined(NETBSD) && defined(__powerpc__)
+# define POWERPC
+# define mach_type_known
+# endif
+# if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))
+# define ARM32
+# define mach_type_known
+# endif
+# if defined(NETBSD) && defined(__sh__)
+# define SH
+# define mach_type_known
+# endif
+# if defined(vax)
+# define VAX
+# ifdef ultrix
+# define ULTRIX
+# else
+# define BSD
+# endif
+# define mach_type_known
+# endif
+# if defined(__NetBSD__) && defined(__vax__)
+# define VAX
+# define mach_type_known
+# endif
+# if defined(mips) || defined(__mips) || defined(_mips)
+# define MIPS
+# if defined(nec_ews) || defined(_nec_ews)
+# define EWS4800
+# endif
+# if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD)
+# if defined(ultrix) || defined(__ultrix)
+# define ULTRIX
+# else
+# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
+ || defined(__SYSTYPE_SVR4__)
+# define IRIX5 /* or IRIX 6.X */
+# else
+# define RISCOS /* or IRIX 4.X */
+# endif
+# endif
+# endif /* !LINUX */
+# if defined(__NetBSD__) && defined(__MIPSEL__)
+# undef ULTRIX
+# endif
+# define mach_type_known
+# endif
+# if defined(DGUX) && (defined(i386) || defined(__i386__))
+# define I386
+# ifndef _USING_DGUX
+# define _USING_DGUX
+# endif
+# define mach_type_known
+# endif
+# if defined(sequent) && (defined(i386) || defined(__i386__))
+# define I386
+# define SEQUENT
+# define mach_type_known
+# endif
+# if defined(sun) && (defined(i386) || defined(__i386__))
+# define I386
+# define SUNOS5
+# define mach_type_known
+# endif
+# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
+# define I386
+# define OS2
+# define mach_type_known
+# endif
+# if defined(ibm032)
+# define RT
+# define mach_type_known
+# endif
+# if defined(sun) && (defined(sparc) || defined(__sparc))
+# define SPARC
+ /* Test for SunOS 5.x */
+# include <errno.h>
+# ifdef ECHRNG
+# define SUNOS5
+# else
+# define SUNOS4
+# endif
+# define mach_type_known
+# endif
+# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
+ && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
+# define SPARC
+# define DRSNX
+# define mach_type_known
+# endif
+# if defined(_IBMR2)
+# define RS6000
+# define mach_type_known
+# endif
+# if defined(__NetBSD__) && defined(__sparc__)
+# define SPARC
+# define mach_type_known
+# endif
+# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
+ /* The above test may need refinement */
+# define I386
+# if defined(_SCO_ELF)
+# define SCO_ELF
+# else
+# define SCO
+# endif
+# define mach_type_known
+# endif
+# if defined(_AUX_SOURCE)
+# define M68K
+# define SYSV
+# define mach_type_known
+# endif
+# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
+ || defined(hppa) || defined(__hppa__)
+# define HP_PA
+# if !defined(LINUX) && !defined(HPUX)
+# define HPUX
+# endif
+# define mach_type_known
+# endif
+# if defined(__ia64) && defined(_HPUX_SOURCE)
+# define IA64
+# ifndef HPUX
+# define HPUX
+# endif
+# define mach_type_known
+# endif
+# if defined(__BEOS__) && defined(_X86_)
+# define I386
+# define BEOS
+# define mach_type_known
+# endif
+# if defined(LINUX) && (defined(i386) || defined(__i386__))
+# define I386
+# define mach_type_known
+# endif
+# if defined(OPENBSD) && defined(__amd64__)
+# define X86_64
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__x86_64__)
+# define X86_64
+# define mach_type_known
+# endif
+# if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
+# define IA64
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__arm__)
+# define ARM32
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__cris__)
+# ifndef CRIS
+# define CRIS
+# endif
+# define mach_type_known
+# endif
+# if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) || \
+ defined(powerpc64) || defined(__powerpc64__))
+# define POWERPC
+# define mach_type_known
+# endif
+# if defined(FREEBSD) && (defined(powerpc) || defined(__powerpc__))
+# define POWERPC
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__mc68000__)
+# define M68K
+# define mach_type_known
+# endif
+# if defined(LINUX) && (defined(sparc) || defined(__sparc__))
+# define SPARC
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__arm__)
+# define ARM32
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__sh__)
+# define SH
+# define mach_type_known
+# endif
+# if defined(LINUX) && defined(__m32r__)
+# define M32R
+# define mach_type_known
+# endif
+# if defined(__alpha) || defined(__alpha__)
+# define ALPHA
+# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)
+# define OSF1 /* a.k.a Digital Unix */
+# endif
+# define mach_type_known
+# endif
+# if defined(_AMIGA) && !defined(AMIGA)
+# define AMIGA
+# endif
+# ifdef AMIGA
+# define M68K
+# define mach_type_known
+# endif
+# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
+# define M68K
+# define MACOS
+# define mach_type_known
+# endif
+# if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)
+# define POWERPC
+# define MACOS
+# define mach_type_known
+# endif
+# ifdef DARWIN
+# if defined(__ppc__) || defined(__ppc64__)
+# define POWERPC
+# define mach_type_known
+# elif defined(__i386__)
+# define I386
+# define mach_type_known
+# define DARWIN_DONT_PARSE_STACK
+# define OS_TYPE "DARWIN"
+# define DYNAMIC_LOADING
+ /* XXX: see get_end(3), get_etext() and get_end() should not be used.
+ These aren't used when dyld support is enabled (it is by default) */
+# define DATASTART ((ptr_t) get_etext())
+# define DATAEND ((ptr_t) get_end())
+# define STACKBOTTOM ((ptr_t) 0xc0000000)
+# define USE_MMAP
+# define USE_MMAP_ANON
+# define USE_ASM_PUSH_REGS
+ /* This is potentially buggy. It needs more testing. See the comments in
+ os_dep.c. It relies on threads to track writes. */
+# ifdef GC_DARWIN_THREADS
+/* # define MPROTECT_VDB -- diabled for now. May work for some apps. */
+# endif
+# include <unistd.h>
+# define GETPAGESIZE() getpagesize()
+# elif defined(__arm__)
+# define ARM
+# define mach_type_known
+# define DARWIN_DONT_PARSE_STACK
+# define GC_DONT_REGISTER_MAIN_STATIC_DATA
+# elif defined(__x86_64)
+# define X86_64
+# define mach_type_known
+# endif
+# endif
+# if defined(NeXT) && defined(mc68000)
+# define M68K
+# define NEXT
+# define mach_type_known
+# endif
+# if defined(NeXT) && (defined(i386) || defined(__i386__))
+# define I386
+# define NEXT
+# define mach_type_known
+# endif
+# if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))
+# define I386
+# define OPENBSD
+# define mach_type_known
+# endif
+# if defined(FREEBSD) && (defined(i386) || defined(__i386__))
+# define I386
+# define mach_type_known
+# endif
+# if defined(FREEBSD) && defined(__x86_64__)
+# define X86_64
+# define mach_type_known
+# endif
+# if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
+# define I386
+# define mach_type_known
+# endif
+# if defined(__NetBSD__) && defined(__x86_64__)
+# define X86_64
+# define mach_type_known
+# endif
+# if defined(FREEBSD) && defined(__sparc__)
+# define SPARC
+# define mach_type_known
+#endif
+# if defined(bsdi) && (defined(i386) || defined(__i386__))
+# define I386
+# define BSDI
+# define mach_type_known
+# endif
+# if !defined(mach_type_known) && defined(__386BSD__)
+# define I386
+# define THREE86BSD
+# define mach_type_known
+# endif
+# if defined(_CX_UX) && defined(_M88K)
+# define M88K
+# define CX_UX
+# define mach_type_known
+# endif
+# if defined(DGUX) && defined(m88k)
+# define M88K
+ /* DGUX defined */
+# define mach_type_known
+# endif
+# if defined(_WIN32_WCE)
+ /* SH3, SH4, MIPS already defined for corresponding architectures */
+# if defined(SH3) || defined(SH4)
+# define SH
+# endif
+# if defined(x86)
+# define I386
+# endif
+# if defined(ARM)
+# define ARM32
+# endif
+# define MSWINCE
+# define mach_type_known
+# else
+# if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
+ || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
+# if defined(__LP64__) || defined(_WIN64)
+# define X86_64
+# else
+# define I386
+# endif
+# define MSWIN32 /* or Win64 */
+# define mach_type_known
+# endif
+# if defined(_MSC_VER) && defined(_M_IA64)
+# define IA64
+# define MSWIN32 /* Really win64, but we don't treat 64-bit */
+ /* variants as a differnt platform. */
+# endif
+# endif
+# if defined(__DJGPP__)
+# define I386
+# ifndef DJGPP
+# define DJGPP /* MSDOS running the DJGPP port of GCC */
+# endif
+# define mach_type_known
+# endif
+# if defined(__CYGWIN32__) || defined(__CYGWIN__)
+# define I386
+# define CYGWIN32
+# define mach_type_known
+# endif
+# if defined(__MINGW32__)
+# define I386
+# define MSWIN32
+# define mach_type_known
+# endif
+# if defined(__BORLANDC__)
+# define I386
+# define MSWIN32
+# define mach_type_known
+# endif
+# if defined(_UTS) && !defined(mach_type_known)
+# define S370
+# define UTS4
+# define mach_type_known
+# endif
+# if defined(__pj__)
+# define PJ
+# define mach_type_known
+# endif
+# if defined(__embedded__) && defined(PPC)
+# define POWERPC
+# define NOSYS
+# define mach_type_known
+# endif
+/* Ivan Demakov */
+# if defined(__WATCOMC__) && defined(__386__)
+# define I386
+# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
+# if defined(__OS2__)
+# define OS2
+# else
+# if defined(__WINDOWS_386__) || defined(__NT__)
+# define MSWIN32
+# else
+# define DOS4GW
+# endif
+# endif
+# endif
+# define mach_type_known
+# endif
+# if defined(__s390__) && defined(LINUX)
+# define S390
+# define mach_type_known
+# endif
+# if defined(__GNU__)
+# if defined(__i386__)
+/* The Debian Hurd running on generic PC */
+# define HURD
+# define I386
+# define mach_type_known
+# endif
+# endif
+
+/* Feel free to add more clauses here */
+
+/* Or manually define the machine type here. A machine type is */
+/* characterized by the architecture. Some */
+/* machine types are further subdivided by OS. */
+/* the macros ULTRIX, RISCOS, and BSD to distinguish. */
+/* Note that SGI IRIX is treated identically to RISCOS. */
+/* SYSV on an M68K actually means A/UX. */
+/* The distinction in these cases is usually the stack starting address */
+# ifndef mach_type_known
+ --> unknown machine type
+# endif
+ /* Mapping is: M68K ==> Motorola 680X0 */
+ /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
+ /* MACOS and AMIGA variants) */
+ /* I386 ==> Intel 386 */
+ /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
+ /* FREEBSD, THREE86BSD, MSWIN32, */
+ /* BSDI,SUNOS5, NEXT, other variants) */
+ /* NS32K ==> Encore Multimax */
+ /* MIPS ==> R2000 or R3000 */
+ /* (RISCOS, ULTRIX variants) */
+ /* VAX ==> DEC VAX */
+ /* (BSD, ULTRIX variants) */
+ /* RS6000 ==> IBM RS/6000 AIX3.X */
+ /* RT ==> IBM PC/RT */
+ /* HP_PA ==> HP9000/700 & /800 */
+ /* HP/UX, LINUX */
+ /* SPARC ==> SPARC v7/v8/v9 */
+ /* (SUNOS4, SUNOS5, LINUX, */
+ /* DRSNX variants) */
+ /* ALPHA ==> DEC Alpha */
+ /* (OSF1 and LINUX variants) */
+ /* M88K ==> Motorola 88XX0 */
+ /* (CX_UX and DGUX) */
+ /* S370 ==> 370-like machine */
+ /* running Amdahl UTS4 */
+ /* S390 ==> 390-like machine */
+ /* running LINUX */
+ /* ARM32 ==> Intel StrongARM */
+ /* IA64 ==> Intel IPF */
+ /* (e.g. Itanium) */
+ /* (LINUX and HPUX) */
+ /* SH ==> Hitachi SuperH */
+ /* (LINUX & MSWINCE) */
+ /* X86_64 ==> AMD x86-64 */
+ /* POWERPC ==> IBM/Apple PowerPC */
+ /* (MACOS(<=9),DARWIN(incl.MACOSX),*/
+ /* LINUX, NETBSD, NOSYS variants) */
+ /* Handles 32 and 64-bit variants. */
+ /* AIX should be handled here, but */
+ /* that's called an RS6000. */
+ /* CRIS ==> Axis Etrax */
+ /* M32R ==> Renesas M32R */
+
+
+/*
+ * For each architecture and OS, the following need to be defined:
+ *
+ * CPP_WORDSZ is a simple integer constant representing the word size.
+ * in bits. We assume byte addressibility, where a byte has 8 bits.
+ * We also assume CPP_WORDSZ is either 32 or 64.
+ * (We care about the length of pointers, not hardware
+ * bus widths. Thus a 64 bit processor with a C compiler that uses
+ * 32 bit pointers should use CPP_WORDSZ of 32, not 64. Default is 32.)
+ *
+ * MACH_TYPE is a string representation of the machine type.
+ * OS_TYPE is analogous for the OS.
+ *
+ * ALIGNMENT is the largest N, such that
+ * all pointer are guaranteed to be aligned on N byte boundaries.
+ * defining it to be 1 will always work, but perform poorly.
+ *
+ * DATASTART is the beginning of the data segment.
+ * On some platforms SEARCH_FOR_DATA_START is defined.
+ * SEARCH_FOR_DATASTART will cause GC_data_start to
+ * be set to an address determined by accessing data backwards from _end
+ * until an unmapped page is found. DATASTART will be defined to be
+ * GC_data_start.
+ * On UNIX-like systems, the collector will scan the area between DATASTART
+ * and DATAEND for root pointers.
+ *
+ * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.
+ * RTH suggests gaining access to linker script synth'd values with
+ * this idiom instead of `&end' where `end' is defined as ``extern int end;'' .
+ * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g.,
+ * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-*
+ * without any special options.
+ *
+ * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
+ * the pointer size.
+ *
+ * STACKBOTTOM is the cool end of the stack, which is usually the
+ * highest address in the stack.
+ * Under PCR or OS/2, we have other ways of finding thread stacks.
+ * For each machine, the following should:
+ * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
+ * 2) define exactly one of
+ * STACKBOTTOM (should be defined to be an expression)
+ * LINUX_STACKBOTTOM
+ * HEURISTIC1
+ * HEURISTIC2
+ * If STACKBOTTOM is defined, then it's value will be used directly as the
+ * stack base. If LINUX_STACKBOTTOM is defined, then it will be determined
+ * with a method appropriate for most Linux systems. Currently we look
+ * first for __libc_stack_end, and if that fails read it from /proc.
+ * If either of the last two macros are defined, then STACKBOTTOM is computed
+ * during collector startup using one of the following two heuristics:
+ * HEURISTIC1: Take an address inside GC_init's frame, and round it up to
+ * the next multiple of STACK_GRAN.
+ * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
+ * in small steps (decrement if STACK_GROWS_UP), and read the value
+ * at each location. Remember the value when the first
+ * Segmentation violation or Bus error is signalled. Round that
+ * to the nearest plausible page boundary, and use that instead
+ * of STACKBOTTOM.
+ *
+ * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
+ * the value of environ is a pointer that can serve as STACKBOTTOM.
+ * I expect that HEURISTIC2 can be replaced by this approach, which
+ * interferes far less with debugging. However it has the disadvantage
+ * that it's confused by a putenv call before the collector is initialized.
+ * This could be dealt with by intercepting putenv ...
+ *
+ * If no expression for STACKBOTTOM can be found, and neither of the above
+ * heuristics are usable, the collector can still be used with all of the above
+ * undefined, provided one of the following is done:
+ * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
+ * without reference to STACKBOTTOM. This is appropriate for use in
+ * conjunction with thread packages, since there will be multiple stacks.
+ * (Allocating thread stacks in the heap, and treating them as ordinary
+ * heap data objects is also possible as a last resort. However, this is
+ * likely to introduce significant amounts of excess storage retention
+ * unless the dead parts of the thread stacks are periodically cleared.)
+ * 2) Client code may set GC_stackbottom before calling any GC_ routines.
+ * If the author of the client code controls the main program, this is
+ * easily accomplished by introducing a new main program, setting
+ * GC_stackbottom to the address of a local variable, and then calling
+ * the original main program. The new main program would read something
+ * like:
+ *
+ * # include "gc_private.h"
+ *
+ * main(argc, argv, envp)
+ * int argc;
+ * char **argv, **envp;
+ * {
+ * int dummy;
+ *
+ * GC_stackbottom = (ptr_t)(&dummy);
+ * return(real_main(argc, argv, envp));
+ * }
+ *
+ *
+ * Each architecture may also define the style of virtual dirty bit
+ * implementation to be used:
+ * MPROTECT_VDB: Write protect the heap and catch faults.
+ * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
+ *
+ * An architecture may define DYNAMIC_LOADING if dynamic_load.c
+ * defined GC_register_dynamic_libraries() for the architecture.
+ *
+ * An architecture may define PREFETCH(x) to preload the cache with *x.
+ * This defaults to a no-op.
+ *
+ * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
+ *
+ * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
+ * clear the two words at GC_malloc-aligned address x. By default,
+ * word stores of 0 are used instead.
+ *
+ * HEAP_START may be defined as the initial address hint for mmap-based
+ * allocation.
+ */
+
+/* If we are using a recent version of gcc, we can use __builtin_unwind_init()
+ * to push the relevant registers onto the stack. This generally makes
+ * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers.
+ */
+# if defined(__GNUC__) && ((__GNUC__ >= 3) || \
+ (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) \
+ && !defined(__INTEL_COMPILER) \
+ && !defined(__PATHCC__)
+# define HAVE_BUILTIN_UNWIND_INIT
+# endif
+
+# define STACK_GRAN 0x1000000
+# ifdef M68K
+# define MACH_TYPE "M68K"
+# define ALIGNMENT 2
+# ifdef OPENBSD
+# define OS_TYPE "OPENBSD"
+# define HEURISTIC2
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# define USE_GENERIC_PUSH_REGS
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# define USE_GENERIC_PUSH_REGS
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define STACKBOTTOM ((ptr_t)0xf0000000)
+# define USE_GENERIC_PUSH_REGS
+ /* We never got around to the assembly version. */
+/* # define MPROTECT_VDB - Reported to not work 9/17/01 */
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# include <features.h>
+# if defined(__GLIBC__)&& __GLIBC__>=2
+# define SEARCH_FOR_DATA_START
+# else /* !GLIBC2 */
+# if defined(PLATFORM_ANDROID)
+# define __environ environ
+# endif
+ extern char **__environ;
+# define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+# endif /* !GLIBC2 */
+ extern int _end[];
+# define DATAEND (_end)
+# else
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# endif
+# endif
+# ifdef SUNOS4
+# define OS_TYPE "SUNOS4"
+ extern char etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x1ffff) & ~0x1ffff))
+# define HEURISTIC1 /* differs */
+# define DYNAMIC_LOADING
+# endif
+# ifdef HP
+# define OS_TYPE "HP"
+ extern char etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# define STACKBOTTOM ((ptr_t) 0xffeffffc)
+ /* empirically determined. seems to work. */
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+# endif
+# ifdef SYSV
+# define OS_TYPE "SYSV"
+ extern etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
+ & ~0x3fffff) \
+ +((word)etext & 0x1fff))
+ /* This only works for shared-text binaries with magic number 0413.
+ The other sorts of SysV binaries put the data at the end of the text,
+ in which case the default of etext would work. Unfortunately,
+ handling both would require having the magic-number available.
+ -- Parag
+ */
+# define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
+ /* The stack starts at the top of memory, but */
+ /* 0x0 cannot be used as setjump_test complains */
+ /* that the stack direction is incorrect. Two */
+ /* bytes down from 0x0 should be safe enough. */
+ /* --Parag */
+# include <sys/mmu.h>
+# define GETPAGESIZE() PAGESIZE /* Is this still right? */
+# endif
+# ifdef AMIGA
+# define OS_TYPE "AMIGA"
+ /* STACKBOTTOM and DATASTART handled specially */
+ /* in os_dep.c */
+# define DATAEND /* not needed */
+# define GETPAGESIZE() 4096
+# endif
+# ifdef MACOS
+# ifndef __LOWMEM__
+# include <LowMem.h>
+# endif
+# define OS_TYPE "MACOS"
+ /* see os_dep.c for details of global data segments. */
+# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
+# define DATAEND /* not needed */
+# define GETPAGESIZE() 4096
+# endif
+# ifdef NEXT
+# define OS_TYPE "NEXT"
+# define DATASTART ((ptr_t) get_etext())
+# define STACKBOTTOM ((ptr_t) 0x4000000)
+# define DATAEND /* not needed */
+# endif
+# endif
+
+# if defined(POWERPC)
+# define MACH_TYPE "POWERPC"
+# ifdef MACOS
+# define ALIGNMENT 2 /* Still necessary? Could it be 4? */
+# ifndef __LOWMEM__
+# include <LowMem.h>
+# endif
+# define OS_TYPE "MACOS"
+ /* see os_dep.c for details of global data segments. */
+# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
+# define DATAEND /* not needed */
+# endif
+
+# ifdef LINUX
+# if defined(__powerpc64__)
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# ifndef HBLKSIZE
+# define HBLKSIZE 4096
+# endif
+# else
+# define ALIGNMENT 4
+# endif
+# define OS_TYPE "LINUX"
+ /* HEURISTIC1 has been reliably reported to fail for a 32-bit */
+ /* executable on a 64 bit kernel. */
+# define LINUX_STACKBOTTOM
+# define DYNAMIC_LOADING
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
+# endif
+# ifdef DARWIN
+# ifdef __ppc64__
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# else
+# define ALIGNMENT 4
+# endif
+# define OS_TYPE "DARWIN"
+# define DYNAMIC_LOADING
+ /* XXX: see get_end(3), get_etext() and get_end() should not be used.
+ These aren't used when dyld support is enabled (it is by default) */
+# define DATASTART ((ptr_t) get_etext())
+# define DATAEND ((ptr_t) get_end())
+# define STACKBOTTOM ((ptr_t) 0xc0000000)
+# define USE_MMAP
+# define USE_MMAP_ANON
+# define USE_ASM_PUSH_REGS
+ /* This is potentially buggy. It needs more testing. See the comments in
+ os_dep.c. It relies on threads to track writes. */
+# ifdef GC_DARWIN_THREADS
+/* # define MPROTECT_VDB -- diabled for now. May work for some apps. */
+# endif
+# include <unistd.h>
+# define GETPAGESIZE() getpagesize()
+# if defined(USE_PPC_PREFETCH) && defined(__GNUC__)
+ /* The performance impact of prefetches is untested */
+# define PREFETCH(x) \
+ __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))
+# endif
+ /* There seems to be some issues with trylock hanging on darwin. This
+ should be looked into some more */
+# define NO_PTHREAD_TRYLOCK
+# endif
+# ifdef FREEBSD
+# define ALIGNMENT 4
+# define OS_TYPE "FREEBSD"
+# ifndef GC_FREEBSD_THREADS
+# define MPROTECT_VDB
+# endif
+# define SIG_SUSPEND SIGUSR1
+# define SIG_THR_RESTART SIGUSR2
+# define FREEBSD_STACKBOTTOM
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+ extern char etext[];
+ extern char * GC_FreeBSDGetDataStart();
+# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
+# endif
+# ifdef NETBSD
+# define ALIGNMENT 4
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+ extern char etext[];
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# endif
+# ifdef SN_TARGET_PS3
+# define NO_GETENV
+# define CPP_WORDSZ 32
+# define ALIGNMENT 4
+ extern int _end [];
+// extern int _dso_handle[];
+ extern int __bss_start;
+
+# define DATAEND (_end)
+# define DATASTART (__bss_start)
+# define STACKBOTTOM ((ptr_t) ps3_get_stack_bottom ())
+# define USE_GENERIC_PUSHREGS
+# endif
+
+# ifdef NOSYS
+# define ALIGNMENT 4
+# define OS_TYPE "NOSYS"
+ extern void __end[], __dso_handle[];
+# define DATASTART (__dso_handle) /* OK, that's ugly. */
+# define DATAEND (__end)
+ /* Stack starts at 0xE0000000 for the simulator. */
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000000
+# define HEURISTIC1
+# endif
+# endif
+
+# ifdef VAX
+# define MACH_TYPE "VAX"
+# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# ifdef BSD
+# define OS_TYPE "BSD"
+# define HEURISTIC1
+ /* HEURISTIC2 may be OK, but it's hard to test. */
+# endif
+# ifdef ULTRIX
+# define OS_TYPE "ULTRIX"
+# define STACKBOTTOM ((ptr_t) 0x7fffc800)
+# endif
+# endif
+
+# ifdef RT
+# define MACH_TYPE "RT"
+# define ALIGNMENT 4
+# define DATASTART ((ptr_t) 0x10000000)
+# define STACKBOTTOM ((ptr_t) 0x1fffd800)
+# endif
+
+# ifdef SPARC
+# define MACH_TYPE "SPARC"
+# if defined(__arch64__) || defined(__sparcv9)
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# define ELF_CLASS ELFCLASS64
+# else
+# define ALIGNMENT 4 /* Required by hardware */
+# define CPP_WORDSZ 32
+# endif
+# define ALIGN_DOUBLE
+# ifdef _FILE_OFFSET_BITS
+# undef _FILE_OFFSET_BITS /* libelf.h & procfs.h doesn't compile with large file support */
+# define _FILE_OFFSET_BITS 32
+# endif
+# ifdef SUNOS5
+# define OS_TYPE "SUNOS5"
+ extern int _etext[];
+ extern int _end[];
+ extern ptr_t GC_SysVGetDataStart();
+# define DATASTART GC_SysVGetDataStart(0x10000, _etext)
+# define DATAEND (_end)
+# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
+# define USE_MMAP
+ /* Otherwise we now use calloc. Mmap may result in the */
+ /* heap interleaved with thread stacks, which can result in */
+ /* excessive blacklisting. Sbrk is unusable since it */
+ /* doesn't interact correctly with the system malloc. */
+# endif
+# ifdef USE_MMAP
+# define HEAP_START (ptr_t)0x40000000
+# else
+# define HEAP_START DATAEND
+# endif
+# define PROC_VDB
+/* HEURISTIC1 reportedly no longer works under 2.7. */
+/* HEURISTIC2 probably works, but this appears to be preferable. */
+/* Apparently USRSTACK is defined to be USERLIMIT, but in some */
+/* installations that's undefined. We work around this with a */
+/* gross hack: */
+# include <sys/vmparam.h>
+# ifdef USERLIMIT
+ /* This should work everywhere, but doesn't. */
+# define STACKBOTTOM USRSTACK
+# else
+# define HEURISTIC2
+# endif
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+ /* getpagesize() appeared to be missing from at least one */
+ /* Solaris 5.4 installation. Weird. */
+# define DYNAMIC_LOADING
+# endif
+# ifdef SUNOS4
+# define OS_TYPE "SUNOS4"
+ /* [If you have a weak stomach, don't read this.] */
+ /* We would like to use: */
+/* # define DATASTART ((ptr_t)((((word) (etext)) + 0x1fff) & ~0x1fff)) */
+ /* This fails occasionally, due to an ancient, but very */
+ /* persistent ld bug. etext is set 32 bytes too high. */
+ /* We instead read the text segment size from the a.out */
+ /* header, which happens to be mapped into our address space */
+ /* at the start of the text segment. The detective work here */
+ /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
+ /* Serpette of INRIA. */
+ /* This assumes ZMAGIC, i.e. demand-loadable executables. */
+# define TEXTSTART 0x2000
+# define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
+# define MPROTECT_VDB
+# define HEURISTIC1
+# define DYNAMIC_LOADING
+# endif
+# ifdef DRSNX
+# define OS_TYPE "DRSNX"
+ extern ptr_t GC_SysVGetDataStart();
+ extern int etext[];
+# define DATASTART GC_SysVGetDataStart(0x10000, etext)
+# define MPROTECT_VDB
+# define STACKBOTTOM ((ptr_t) 0xdfff0000)
+# define DYNAMIC_LOADING
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# else
+ Linux Sparc/a.out not supported
+# endif
+# define SVR4
+# include <features.h>
+# if defined(__GLIBC__) && __GLIBC__ >= 2
+# define SEARCH_FOR_DATA_START
+# else
+ extern char **__environ;
+# define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+# endif
+ extern int _end[];
+# define DATAEND (_end)
+# define LINUX_STACKBOTTOM
+# endif
+# ifdef OPENBSD
+# define OS_TYPE "OPENBSD"
+# define STACKBOTTOM ((ptr_t) 0xf8000000)
+ extern int etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# endif
+# ifdef FREEBSD
+# define OS_TYPE "FREEBSD"
+# define SIG_SUSPEND SIGUSR1
+# define SIG_THR_RESTART SIGUSR2
+# define FREEBSD_STACKBOTTOM
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+ extern char etext[];
+ extern char edata[];
+ extern char end[];
+# define NEED_FIND_LIMIT
+# define DATASTART ((ptr_t)(&etext))
+# define DATAEND (GC_find_limit (DATASTART, TRUE))
+# define DATASTART2 ((ptr_t)(&edata))
+# define DATAEND2 ((ptr_t)(&end))
+# endif
+# endif
+
+# ifdef I386
+# if defined( NACL )
+# define MACH_TYPE "NACL"
+# define CPP_WORDSZ 32
+# define ALIGNMENT 4
+# else
+# define MACH_TYPE "I386"
+# if defined(__LP64__) || defined(_WIN64)
+# define CPP_WORDSZ 64
+# define ALIGNMENT 8
+# else
+# define CPP_WORDSZ 32
+# define ALIGNMENT 4
+# endif
+ /* Appears to hold for all "32 bit" compilers */
+ /* except Borland. The -a4 option fixes */
+ /* Borland. */
+ /* Ivan Demakov: For Watcom the option is -zp4. */
+# endif
+# ifndef SMALL_CONFIG
+# define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
+ /* improvement on Pentiums. */
+# endif
+# ifdef HAVE_BUILTIN_UNWIND_INIT
+# define USE_GENERIC_PUSH_REGS
+# endif
+# ifdef SEQUENT
+# define OS_TYPE "SEQUENT"
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# define STACKBOTTOM ((ptr_t) 0x3ffff000)
+# endif
+# ifdef BEOS
+# define OS_TYPE "BEOS"
+# include <OS.h>
+# define GETPAGESIZE() B_PAGE_SIZE
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# endif
+# ifdef SUNOS5
+# define OS_TYPE "SUNOS5"
+ extern int _etext[], _end[];
+ extern ptr_t GC_SysVGetDataStart();
+# define DATASTART GC_SysVGetDataStart(0x1000, _etext)
+# define DATAEND (_end)
+/* # define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7, */
+/* but reportedly breaks under 2.8. It appears that the stack */
+/* base is a property of the executable, so this should not break */
+/* old executables. */
+/* HEURISTIC2 probably works, but this appears to be preferable. */
+# include <sys/vm.h>
+# define STACKBOTTOM USRSTACK
+/* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
+/* It appears to be fixed in 2.8 and 2.9. */
+# ifdef SOLARIS25_PROC_VDB_BUG_FIXED
+/* Reading of dirty bits doesn't seem to work even in solaris 10 */
+/*# define PROC_VDB */
+# endif
+# define DYNAMIC_LOADING
+# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
+# define USE_MMAP
+ /* Otherwise we now use calloc. Mmap may result in the */
+ /* heap interleaved with thread stacks, which can result in */
+ /* excessive blacklisting. Sbrk is unusable since it */
+ /* doesn't interact correctly with the system malloc. */
+# endif
+# ifdef USE_MMAP
+# define HEAP_START (ptr_t)0x40000000
+# else
+# define HEAP_START DATAEND
+# endif
+# endif
+# ifdef SCO
+# define OS_TYPE "SCO"
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
+ & ~0x3fffff) \
+ +((word)etext & 0xfff))
+# define STACKBOTTOM ((ptr_t) 0x7ffffffc)
+# endif
+# ifdef SCO_ELF
+# define OS_TYPE "SCO_ELF"
+ extern int etext[];
+# define DATASTART ((ptr_t)(etext))
+# define STACKBOTTOM ((ptr_t) 0x08048000)
+# define DYNAMIC_LOADING
+# define ELF_CLASS ELFCLASS32
+# endif
+# ifdef DGUX
+# define OS_TYPE "DGUX"
+ extern int _etext, _end;
+ extern ptr_t GC_SysVGetDataStart();
+# define DATASTART GC_SysVGetDataStart(0x1000, &_etext)
+# define DATAEND (&_end)
+# define STACK_GROWS_DOWN
+# define HEURISTIC2
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+# define DYNAMIC_LOADING
+# ifndef USE_MMAP
+# define USE_MMAP
+# endif /* USE_MMAP */
+# define MAP_FAILED (void *) -1
+# ifdef USE_MMAP
+# define HEAP_START (ptr_t)0x40000000
+# else /* USE_MMAP */
+# define HEAP_START DATAEND
+# endif /* USE_MMAP */
+# endif /* DGUX */
+# ifdef NACL
+# define OS_TYPE "NACL"
+ extern int etext[];
+//# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# define DATASTART ((ptr_t)0x10000000)
+ extern int _end[];
+# define DATAEND (_end)
+# ifdef STACK_GRAN
+# undef STACK_GRAN
+# endif /* STACK_GRAN */
+# define STACK_GRAN 0x10000
+# define HEURISTIC1
+# ifdef USE_MMAP
+# undef USE_MMAP
+# endif
+# ifdef USE_MUNMAP
+# undef USE_MUNMAP
+# endif
+# ifdef USE_MMAP_ANON
+# undef USE_MMAP_ANON
+# endif
+# ifdef USE_MMAP_FIXED
+# undef USE_MMAP_FIXED
+# endif
+# define GETPAGESIZE() 65536
+# define MAX_NACL_GC_THREADS 1024
+# endif
+# ifdef LINUX
+# ifndef __GNUC__
+ /* The Intel compiler doesn't like inline assembly */
+# define USE_GENERIC_PUSH_REGS
+# endif
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# if 0
+# define HEURISTIC1
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000000
+ /* STACKBOTTOM is usually 0xc0000000, but this changes with */
+ /* different kernel configurations. In particular, systems */
+ /* with 2GB physical memory will usually move the user */
+ /* address space limit, and hence initial SP to 0x80000000. */
+# endif
+# if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
+# define MPROTECT_VDB
+# else
+ /* We seem to get random errors in incremental mode, */
+ /* possibly because Linux threads is itself a malloc client */
+ /* and can't deal with the signals. */
+# endif
+# define HEAP_START (ptr_t)0x1000
+ /* This encourages mmap to give us low addresses, */
+ /* thus allowing the heap to grow to ~3GB */
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# ifdef UNDEFINED /* includes ro data */
+ extern int _etext[];
+# define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
+# endif
+# include <features.h>
+# if defined(__GLIBC__) && __GLIBC__ >= 2
+# define SEARCH_FOR_DATA_START
+# else
+ extern char **__environ;
+# define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+# endif
+ extern int _end[];
+# define DATAEND (_end)
+# else
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# endif
+# ifdef USE_I686_PREFETCH
+ /* FIXME: Thus should use __builtin_prefetch, but we'll leave that */
+ /* for the next rtelease. */
+# define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
+ /* Empirically prefetcht0 is much more effective at reducing */
+ /* cache miss stalls for the targetted load instructions. But it */
+ /* seems to interfere enough with other cache traffic that the net */
+ /* result is worse than prefetchnta. */
+# if 0
+ /* Using prefetches for write seems to have a slight negative */
+ /* impact on performance, at least for a PIII/500. */
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
+# endif
+# endif
+# ifdef USE_3DNOW_PREFETCH
+# define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
+# endif
+# endif
+# ifdef CYGWIN32
+# define OS_TYPE "CYGWIN32"
+# define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */
+# define DATAEND ((ptr_t)GC_DATAEND)
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000
+# define HEURISTIC1
+# endif
+# ifdef OS2
+# define OS_TYPE "OS2"
+ /* STACKBOTTOM and DATASTART are handled specially in */
+ /* os_dep.c. OS2 actually has the right */
+ /* system call! */
+# define DATAEND /* not needed */
+# define USE_GENERIC_PUSH_REGS
+# endif
+# ifdef MSWIN32
+# define OS_TYPE "MSWIN32"
+ /* STACKBOTTOM and DATASTART are handled specially in */
+ /* os_dep.c. */
+# ifndef __WATCOMC__
+# define MPROTECT_VDB
+# endif
+# define DATAEND /* not needed */
+# endif
+# ifdef MSWINCE
+# define OS_TYPE "MSWINCE"
+# define DATAEND /* not needed */
+# endif
+# ifdef DJGPP
+# define OS_TYPE "DJGPP"
+# include "stubinfo.h"
+ extern int etext[];
+ extern int _stklen;
+ extern int __djgpp_stack_limit;
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))
+/* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
+ + _stklen)) */
+# define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
+ /* This may not be right. */
+# endif
+# ifdef OPENBSD
+# define OS_TYPE "OPENBSD"
+# ifdef GC_OPENBSD_THREADS
+# define UTHREAD_SP_OFFSET 192
+# else
+# include <sys/param.h>
+# include <uvm/uvm_extern.h>
+# define STACKBOTTOM USRSTACK
+# endif
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+ extern char _end[];
+# define DATAEND ((ptr_t)(&_end))
+# define DYNAMIC_LOADING
+# endif
+# ifdef FREEBSD
+# define OS_TYPE "FREEBSD"
+# ifndef GC_FREEBSD_THREADS
+# define MPROTECT_VDB
+# endif
+# define SIG_SUSPEND SIGTSTP
+# define SIG_THR_RESTART SIGCONT
+# define FREEBSD_STACKBOTTOM
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+ extern char etext[];
+ extern char * GC_FreeBSDGetDataStart();
+# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+# endif
+# ifdef THREE86BSD
+# define OS_TYPE "THREE86BSD"
+# endif
+# ifdef BSDI
+# define OS_TYPE "BSDI"
+# endif
+# if defined(OPENBSD) || defined(NETBSD) \
+ || defined(THREE86BSD) || defined(BSDI)
+# define HEURISTIC2
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# ifdef NEXT
+# define OS_TYPE "NEXT"
+# define DATASTART ((ptr_t) get_etext())
+# define STACKBOTTOM ((ptr_t)0xc0000000)
+# define DATAEND /* not needed */
+# endif
+# ifdef DOS4GW
+# define OS_TYPE "DOS4GW"
+ extern long __nullarea;
+ extern char _end;
+ extern char *_STACKTOP;
+ /* Depending on calling conventions Watcom C either precedes
+ or does not precedes with undescore names of C-variables.
+ Make sure startup code variables always have the same names. */
+ #pragma aux __nullarea "*";
+ #pragma aux _end "*";
+# define STACKBOTTOM ((ptr_t) _STACKTOP)
+ /* confused? me too. */
+# define DATASTART ((ptr_t) &__nullarea)
+# define DATAEND ((ptr_t) &_end)
+# endif
+# ifdef HURD
+# define OS_TYPE "HURD"
+# define STACK_GROWS_DOWN
+# define HEURISTIC2
+ extern int __data_start[];
+# define DATASTART ( (ptr_t) (__data_start))
+ extern int _end[];
+# define DATAEND ( (ptr_t) (_end))
+/* # define MPROTECT_VDB Not quite working yet? */
+# define DYNAMIC_LOADING
+# endif
+# endif
+
+# ifdef NS32K
+# define MACH_TYPE "NS32K"
+# define ALIGNMENT 4
+ extern char **environ;
+# define DATASTART ((ptr_t)(&environ))
+ /* hideous kludge: environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+# define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
+# endif
+
+# ifdef MIPS
+# define MACH_TYPE "MIPS"
+# ifdef LINUX
+ /* This was developed for a linuxce style platform. Probably */
+ /* needs to be tweaked for workstation class machines. */
+# define OS_TYPE "LINUX"
+# define DYNAMIC_LOADING
+ extern int _end[];
+# define DATAEND (_end)
+#pragma weak __data_start
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# else
+# define ALIGNMENT 4
+# endif
+# define USE_GENERIC_PUSH_REGS
+# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
+# define LINUX_STACKBOTTOM
+# else
+# define STACKBOTTOM 0x80000000
+# endif
+# endif /* Linux */
+# ifdef EWS4800
+# define HEURISTIC2
+# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
+ extern int _fdata[], _end[];
+# define DATASTART ((ptr_t)_fdata)
+# define DATAEND ((ptr_t)_end)
+# define CPP_WORDSZ _MIPS_SZPTR
+# define ALIGNMENT (_MIPS_SZPTR/8)
+# else
+ extern int etext[], edata[], end[];
+ extern int _DYNAMIC_LINKING[], _gp[];
+# define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \
+ + ((word)etext & 0xffff)))
+# define DATAEND (edata)
+# define DATASTART2 (_DYNAMIC_LINKING \
+ ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
+ : (ptr_t)edata)
+# define DATAEND2 (end)
+# define ALIGNMENT 4
+# endif
+# define OS_TYPE "EWS4800"
+# define USE_GENERIC_PUSH_REGS 1
+# endif
+# ifdef ULTRIX
+# define HEURISTIC2
+# define DATASTART (ptr_t)0x10000000
+ /* Could probably be slightly higher since */
+ /* startup code allocates lots of stuff. */
+# define OS_TYPE "ULTRIX"
+# define ALIGNMENT 4
+# endif
+# ifdef RISCOS
+# define HEURISTIC2
+# define DATASTART (ptr_t)0x10000000
+# define OS_TYPE "RISCOS"
+# define ALIGNMENT 4 /* Required by hardware */
+# endif
+# ifdef IRIX5
+# define HEURISTIC2
+ extern int _fdata[];
+# define DATASTART ((ptr_t)(_fdata))
+# ifdef USE_MMAP
+# define HEAP_START (ptr_t)0x30000000
+# else
+# define HEAP_START DATASTART
+# endif
+ /* Lowest plausible heap address. */
+ /* In the MMAP case, we map there. */
+ /* In either case it is used to identify */
+ /* heap sections so they're not */
+ /* considered as roots. */
+# define OS_TYPE "IRIX5"
+/*# define MPROTECT_VDB DOB: this should work, but there is evidence */
+/* of recent breakage. */
+# ifdef _MIPS_SZPTR
+# define CPP_WORDSZ _MIPS_SZPTR
+# define ALIGNMENT (_MIPS_SZPTR/8)
+# if CPP_WORDSZ != 64
+# define ALIGN_DOUBLE
+# endif
+# else
+# define ALIGNMENT 4
+# define ALIGN_DOUBLE
+# endif
+# define DYNAMIC_LOADING
+# endif
+# ifdef MSWINCE
+# define OS_TYPE "MSWINCE"
+# define ALIGNMENT 4
+# define DATAEND /* not needed */
+# endif
+# if defined(NETBSD)
+# define ALIGNMENT 4
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# define USE_GENERIC_PUSH_REGS
+# ifdef __ELF__
+ extern int etext[];
+# define DATASTART GC_data_start
+# define NEED_FIND_LIMIT
+# define DYNAMIC_LOADING
+# else
+# define DATASTART ((ptr_t) 0x10000000)
+# define STACKBOTTOM ((ptr_t) 0x7ffff000)
+# endif /* _ELF_ */
+# endif
+# endif
+
+# ifdef RS6000
+# define MACH_TYPE "RS6000"
+# ifdef ALIGNMENT
+# undef ALIGNMENT
+# endif
+# ifdef IA64
+# undef IA64 /* DOB: some AIX installs stupidly define IA64 in /usr/include/sys/systemcfg.h */
+# endif
+# ifdef __64BIT__
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# define STACKBOTTOM ((ptr_t)0x1000000000000000)
+# else
+# define ALIGNMENT 4
+# define CPP_WORDSZ 32
+# define STACKBOTTOM ((ptr_t)((ulong)&errno))
+# endif
+# define USE_MMAP
+# define USE_MMAP_ANON
+ /* From AIX linker man page:
+ _text Specifies the first location of the program.
+ _etext Specifies the first location after the program.
+ _data Specifies the first location of the data.
+ _edata Specifies the first location after the initialized data
+ _end or end Specifies the first location after all data.
+ */
+ extern int _data[], _end[];
+# define DATASTART ((ptr_t)((ulong)_data))
+# define DATAEND ((ptr_t)((ulong)_end))
+ extern int errno;
+# define USE_GENERIC_PUSH_REGS
+# define DYNAMIC_LOADING
+ /* For really old versions of AIX, this may have to be removed. */
+# endif
+
+# ifdef HP_PA
+# define MACH_TYPE "HP_PA"
+# ifdef __LP64__
+# define CPP_WORDSZ 64
+# define ALIGNMENT 8
+# else
+# define CPP_WORDSZ 32
+# define ALIGNMENT 4
+# define ALIGN_DOUBLE
+# endif
+# if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)
+# ifndef LINUX /* For now. */
+# define MPROTECT_VDB
+# endif
+# else
+# define GENERIC_COMPARE_AND_SWAP
+ /* No compare-and-swap instruction. Use pthread mutexes */
+ /* when we absolutely have to. */
+# ifdef PARALLEL_MARK
+# define USE_MARK_BYTES
+ /* Minimize compare-and-swap usage. */
+# endif
+# endif
+# define STACK_GROWS_UP
+# ifdef HPUX
+# define OS_TYPE "HPUX"
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+# if 0
+ /* The following appears to work for 7xx systems running HP/UX */
+ /* 9.xx Furthermore, it might result in much faster */
+ /* collections than HEURISTIC2, which may involve scanning */
+ /* segments that directly precede the stack. It is not the */
+ /* default, since it may not work on older machine/OS */
+ /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
+ /* this.) */
+# define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */
+# else
+ /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
+ /* to this. Note that the GC must be initialized before the */
+ /* first putenv call. */
+ extern char ** environ;
+# define STACKBOTTOM ((ptr_t)environ)
+# endif
+# define DYNAMIC_LOADING
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+# ifndef __GNUC__
+# define PREFETCH(x) { \
+ register long addr = (long)(x); \
+ (void) _asm ("LDW", 0, 0, addr, 0); \
+ }
+# endif
+# endif /* HPUX */
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# define DYNAMIC_LOADING
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (&_end)
+# endif /* LINUX */
+# endif /* HP_PA */
+
+# ifdef ALPHA
+# define MACH_TYPE "ALPHA"
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# ifndef LINUX
+# define USE_GENERIC_PUSH_REGS
+ /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
+ /* fp registers in some cases when the target is a 21264. The assembly */
+ /* code doesn't handle that yet, and version dependencies make that a */
+ /* bit tricky. Do the easy thing for now. */
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# define DATASTART GC_data_start
+# define ELFCLASS32 32
+# define ELFCLASS64 64
+# define ELF_CLASS ELFCLASS64
+# define DYNAMIC_LOADING
+# endif
+# ifdef OPENBSD
+# define OS_TYPE "OPENBSD"
+# define HEURISTIC2
+# ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */
+# define DATASTART GC_data_start
+# define ELFCLASS32 32
+# define ELFCLASS64 64
+# define ELF_CLASS ELFCLASS64
+# else /* ECOFF, until OpenBSD/Alpha 2.7 */
+# define DATASTART ((ptr_t) 0x140000000)
+# endif
+# endif
+# ifdef FREEBSD
+# define OS_TYPE "FREEBSD"
+/* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
+# define SIG_SUSPEND SIGTSTP
+# define SIG_THR_RESTART SIGCONT
+# define FREEBSD_STACKBOTTOM
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+/* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
+ extern char etext[];
+ extern char edata[];
+ extern char end[];
+# define NEED_FIND_LIMIT
+# define DATASTART ((ptr_t)(&etext))
+# define DATAEND (GC_find_limit (DATASTART, TRUE))
+# define DATASTART2 ((ptr_t)(&edata))
+# define DATAEND2 ((ptr_t)(&end))
+# endif
+# ifdef OSF1
+# define OS_TYPE "OSF1"
+# define DATASTART ((ptr_t) 0x140000000)
+ extern int _end[];
+# define DATAEND ((ptr_t) &_end)
+ extern char ** environ;
+ /* round up from the value of environ to the nearest page boundary */
+ /* Probably breaks if putenv is called before collector */
+ /* initialization. */
+# define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
+/* # define HEURISTIC2 */
+ /* Normally HEURISTIC2 is too conervative, since */
+ /* the text segment immediately follows the stack. */
+ /* Hence we give an upper pound. */
+ /* This is currently unused, since we disabled HEURISTIC2 */
+ extern int __start[];
+# define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
+# ifndef GC_OSF1_THREADS
+ /* Unresolved signal issues with threads. */
+# define MPROTECT_VDB
+# endif
+# define DYNAMIC_LOADING
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# ifdef __ELF__
+# define SEARCH_FOR_DATA_START
+# define DYNAMIC_LOADING
+# else
+# define DATASTART ((ptr_t) 0x140000000)
+# endif
+ extern int _end[];
+# define DATAEND (_end)
+# define MPROTECT_VDB
+ /* Has only been superficially tested. May not */
+ /* work on all versions. */
+# endif
+# endif
+
+# ifdef IA64
+# define MACH_TYPE "IA64"
+# define USE_GENERIC_PUSH_REGS
+ /* We need to get preserved registers in addition to register */
+ /* windows. That's easiest to do with setjmp. */
+# ifdef PARALLEL_MARK
+# define USE_MARK_BYTES
+ /* Compare-and-exchange is too expensive to use for */
+ /* setting mark bits. */
+# endif
+# ifdef HPUX
+# ifdef _ILP32
+# define CPP_WORDSZ 32
+# define ALIGN_DOUBLE
+ /* Requires 8 byte alignment for malloc */
+# define ALIGNMENT 4
+# else
+# ifndef _LP64
+ ---> unknown ABI
+# endif
+# define CPP_WORDSZ 64
+# define ALIGN_DOUBLE
+ /* Requires 16 byte alignment for malloc */
+# define ALIGNMENT 8
+# endif
+# define OS_TYPE "HPUX"
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+ /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
+ /* to this. Note that the GC must be initialized before the */
+ /* first putenv call. */
+ extern char ** environ;
+# define STACKBOTTOM ((ptr_t)environ)
+# define HPUX_STACKBOTTOM
+# define DYNAMIC_LOADING
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+ /* The following was empirically determined, and is probably */
+ /* not very robust. */
+ /* Note that the backing store base seems to be at a nice */
+ /* address minus one page. */
+# define BACKING_STORE_DISPLACEMENT 0x1000000
+# define BACKING_STORE_ALIGNMENT 0x1000
+ extern ptr_t GC_register_stackbottom;
+# define BACKING_STORE_BASE GC_register_stackbottom
+ /* Known to be wrong for recent HP/UX versions!!! */
+# endif
+# ifdef LINUX
+# define CPP_WORDSZ 64
+# define ALIGN_DOUBLE
+ /* Requires 16 byte alignment for malloc */
+# define ALIGNMENT 8
+# define OS_TYPE "LINUX"
+ /* The following works on NUE and older kernels: */
+/* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */
+ /* This does not work on NUE: */
+# define LINUX_STACKBOTTOM
+ /* We also need the base address of the register stack */
+ /* backing store. This is computed in */
+ /* GC_linux_register_stack_base based on the following */
+ /* constants: */
+# define BACKING_STORE_ALIGNMENT 0x100000
+# define BACKING_STORE_DISPLACEMENT 0x80000000
+ extern ptr_t GC_register_stackbottom;
+# define BACKING_STORE_BASE GC_register_stackbottom
+# define SEARCH_FOR_DATA_START
+# ifdef __GNUC__
+# define DYNAMIC_LOADING
+# else
+ /* In the Intel compiler environment, we seem to end up with */
+ /* statically linked executables and an undefined reference */
+ /* to _DYNAMIC */
+# endif
+# define MPROTECT_VDB
+ /* Requires Linux 2.3.47 or later. */
+ extern int _end[];
+# define DATAEND (_end)
+# ifdef __GNUC__
+# ifndef __INTEL_COMPILER
+# define PREFETCH(x) \
+ __asm__ (" lfetch [%0]": : "r"(x))
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ (" lfetch.excl [%0]": : "r"(x))
+# define CLEAR_DOUBLE(x) \
+ __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
+# else
+# include <ia64intrin.h>
+# define PREFETCH(x) \
+ __lfetch(__lfhint_none, (x))
+# define PREFETCH_FOR_WRITE(x) \
+ __lfetch(__lfhint_nta, (x))
+# define CLEAR_DOUBLE(x) \
+ __stf_spill((void *)(x), 0)
+# endif // __INTEL_COMPILER
+# endif
+# endif
+# ifdef MSWIN32
+ /* FIXME: This is a very partial guess. There is no port, yet. */
+# define OS_TYPE "MSWIN32"
+ /* STACKBOTTOM and DATASTART are handled specially in */
+ /* os_dep.c. */
+# define DATAEND /* not needed */
+# if defined(_WIN64)
+# define CPP_WORDSZ 64
+# else
+# define CPP_WORDSZ 32 /* Is this possible? */
+# endif
+# define ALIGNMENT 8
+# endif
+# endif
+
+# ifdef M88K
+# define MACH_TYPE "M88K"
+# define ALIGNMENT 4
+# define ALIGN_DOUBLE
+ extern int etext[];
+# ifdef CX_UX
+# define OS_TYPE "CX_UX"
+# define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
+# endif
+# ifdef DGUX
+# define OS_TYPE "DGUX"
+ extern ptr_t GC_SysVGetDataStart();
+# define DATASTART GC_SysVGetDataStart(0x10000, etext)
+# endif
+# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
+# endif
+
+# ifdef S370
+ /* If this still works, and if anyone cares, this should probably */
+ /* be moved to the S390 category. */
+# define MACH_TYPE "S370"
+# define ALIGNMENT 4 /* Required by hardware */
+# define USE_GENERIC_PUSH_REGS
+# ifdef UTS4
+# define OS_TYPE "UTS4"
+ extern int etext[];
+ extern int _etext[];
+ extern int _end[];
+ extern ptr_t GC_SysVGetDataStart();
+# define DATASTART GC_SysVGetDataStart(0x10000, _etext)
+# define DATAEND (_end)
+# define HEURISTIC2
+# endif
+# endif
+
+# ifdef S390
+# define MACH_TYPE "S390"
+# define USE_GENERIC_PUSH_REGS
+# ifndef __s390x__
+# define ALIGNMENT 4
+# define CPP_WORDSZ 32
+# else
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# endif
+# ifndef HBLKSIZE
+# define HBLKSIZE 4096
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# define DYNAMIC_LOADING
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+ extern int _end[];
+# define DATAEND (_end)
+# define CACHE_LINE_SIZE 256
+# define GETPAGESIZE() 4096
+# endif
+# endif
+
+# if defined(PJ)
+# define ALIGNMENT 4
+ extern int _etext[];
+# define DATASTART ((ptr_t)(_etext))
+# define HEURISTIC1
+# endif
+
+# ifdef ARM32
+# define CPP_WORDSZ 32
+# define MACH_TYPE "ARM32"
+# define ALIGNMENT 4
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
+# define USE_GENERIC_PUSH_REGS
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000000
+# define USE_GENERIC_PUSH_REGS
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# include <features.h>
+# if defined(__GLIBC__) && __GLIBC__ >= 2
+# define SEARCH_FOR_DATA_START
+# elif defined(PLATFORM_ANDROID)
+# define SEARCH_FOR_DATA_START
+# else
+ extern char **__environ;
+# define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+# endif
+ extern int _end[];
+# define DATAEND (_end)
+# else
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# endif
+# endif
+# ifdef MSWINCE
+# define OS_TYPE "MSWINCE"
+# define DATAEND /* not needed */
+# endif
+# ifdef DARWIN
+# define OS_TYPE "DARWIN"
+# define DATASTART ((ptr_t) get_etext())
+# define DATAEND ((ptr_t) get_end())
+# define STACKBOTTOM ((ptr_t) 0x30000000)
+# define USE_MMAP
+# define USE_MMAP_ANON
+# define USE_MUNMAP
+# endif
+# ifdef NOSYS
+ /* __data_start is usually defined in the target linker script. */
+ extern int __data_start[];
+# define DATASTART (ptr_t)(__data_start)
+# define USE_GENERIC_PUSH_REGS
+ /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */
+ extern void *__stack_base__;
+# define STACKBOTTOM ((ptr_t) (__stack_base__))
+# endif
+#endif
+
+# ifdef CRIS
+# define MACH_TYPE "CRIS"
+# define CPP_WORDSZ 32
+# define ALIGNMENT 1
+# define OS_TYPE "LINUX"
+# define DYNAMIC_LOADING
+# define LINUX_STACKBOTTOM
+# define USE_GENERIC_PUSH_REGS
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
+# endif
+
+# ifdef SH
+# define MACH_TYPE "SH"
+# define ALIGNMENT 4
+# ifdef MSWINCE
+# define OS_TYPE "MSWINCE"
+# define DATAEND /* not needed */
+# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# define USE_GENERIC_PUSH_REGS
+# define DYNAMIC_LOADING
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# define HEURISTIC2
+# define DATASTART GC_data_start
+# define USE_GENERIC_PUSH_REGS
+# define DYNAMIC_LOADING
+# endif
+# endif
+
+# ifdef SH4
+# define MACH_TYPE "SH4"
+# define OS_TYPE "MSWINCE"
+# define ALIGNMENT 4
+# define DATAEND /* not needed */
+# endif
+
+# ifdef M32R
+# define CPP_WORDSZ 32
+# define MACH_TYPE "M32R"
+# define ALIGNMENT 4
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000000
+# define USE_GENERIC_PUSH_REGS
+# define DYNAMIC_LOADING
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
+# endif
+# endif
+
+# ifdef X86_64
+# define MACH_TYPE "X86_64"
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# ifndef HBLKSIZE
+# define HBLKSIZE 4096
+# endif
+# define CACHE_LINE_SIZE 64
+# define USE_GENERIC_PUSH_REGS
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define LINUX_STACKBOTTOM
+# ifndef USE_MMAP
+# define FALLBACK_TO_MMAP
+# endif
+# if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
+# define MPROTECT_VDB
+# else
+ /* We seem to get random errors in incremental mode, */
+ /* possibly because Linux threads is itself a malloc client */
+ /* and can't deal with the signals. */
+# endif
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# ifdef UNDEFINED /* includes ro data */
+ extern int _etext[];
+# define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
+# endif
+# include <features.h>
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
+# else
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+# endif
+# if defined(__GNUC__) && __GNUC >= 3
+# define PREFETCH(x) __builtin_prefetch((x), 0, 0)
+# define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1)
+# endif
+# endif
+# ifdef DARWIN
+# define OS_TYPE "DARWIN"
+# define DARWIN_DONT_PARSE_STACK
+# define DYNAMIC_LOADING
+ /* XXX: see get_end(3), get_etext() and get_end() should not be used.
+ These aren't used when dyld support is enabled (it is by default) */
+# define DATASTART ((ptr_t) get_etext())
+# define DATAEND ((ptr_t) get_end())
+# define STACKBOTTOM ((ptr_t) 0x7fff5fc00000)
+# ifndef USE_MMAP
+# define USE_MMAP
+# endif
+# define USE_MMAP_ANON
+# ifdef GC_DARWIN_THREADS
+# define MPROTECT_VDB
+# endif
+# include <unistd.h>
+# define GETPAGESIZE() getpagesize()
+ /* There seems to be some issues with trylock hanging on darwin. This
+ should be looked into some more */
+# endif
+# ifdef FREEBSD
+# define OS_TYPE "FREEBSD"
+# ifndef GC_FREEBSD_THREADS
+# define MPROTECT_VDB
+# endif
+# define SIG_SUSPEND SIGTSTP
+# define SIG_THR_RESTART SIGCONT
+# define NEED_FIND_LIMIT
+# define FREEBSD_STACKBOTTOM
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+ extern char etext[];
+ extern char * GC_FreeBSDGetDataStart();
+# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
+# endif
+# ifdef NETBSD
+# define OS_TYPE "NETBSD"
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# endif
+# define HEURISTIC2
+ extern char etext[];
+# define SEARCH_FOR_DATA_START
+# endif
+# ifdef OPENBSD
+# define OS_TYPE "OPENBSD"
+# define ELF_CLASS ELFCLASS64
+# ifdef GC_OPENBSD_THREADS
+# define UTHREAD_SP_OFFSET 400
+# else
+# include <sys/param.h>
+# include <uvm/uvm_extern.h>
+# define STACKBOTTOM USRSTACK
+# endif
+ extern int __data_start[];
+# define DATASTART ((ptr_t)(__data_start))
+ extern char _end[];
+# define DATAEND ((ptr_t)(&_end))
+# define DYNAMIC_LOADING
+# endif
+# endif
+
+#if defined(LINUX) && defined(USE_MMAP)
+ /* The kernel may do a somewhat better job merging mappings etc. */
+ /* with anonymous mappings. */
+# define USE_MMAP_ANON
+#endif
+
+#if defined(LINUX) && defined(REDIRECT_MALLOC)
+ /* Rld appears to allocate some memory with its own allocator, and */
+ /* some through malloc, which might be redirected. To make this */
+ /* work with collectable memory, we have to scan memory allocated */
+ /* by rld's internal malloc. */
+# define USE_PROC_FOR_LIBRARIES
+#endif
+
+# ifndef STACK_GROWS_UP
+# define STACK_GROWS_DOWN
+# endif
+
+# ifndef CPP_WORDSZ
+# define CPP_WORDSZ 32
+# endif
+
+# ifndef OS_TYPE
+# define OS_TYPE ""
+# endif
+
+# ifndef DATAEND
+ extern int end[];
+# define DATAEND (end)
+# endif
+
+# if defined(SVR4) && !defined(GETPAGESIZE)
+# include <unistd.h>
+# define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+# endif
+
+# ifndef GETPAGESIZE
+# if defined(SUNOS5) || defined(IRIX5)
+# include <unistd.h>
+# endif
+# define GETPAGESIZE() getpagesize()
+# endif
+
+# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
+ /* OS has SVR4 generic features. Probably others also qualify. */
+# define SVR4
+# endif
+
+# if defined(SUNOS5) || defined(DRSNX)
+ /* OS has SUNOS5 style semi-undocumented interface to dynamic */
+ /* loader. */
+# define SUNOS5DL
+ /* OS has SUNOS5 style signal handlers. */
+# define SUNOS5SIGS
+# endif
+
+# if defined(HPUX)
+# define SUNOS5SIGS
+# endif
+
+# if defined(FREEBSD) && (__FreeBSD__ >= 4)
+# define SUNOS5SIGS
+# endif
+
+# if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \
+ || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
+ || defined(DGUX) || defined(BSD) || defined(SUNOS4) \
+ || defined(_AIX) || defined(DARWIN) || defined(OSF1)
+# define UNIX_LIKE /* Basic Unix-like system calls work. */
+# endif
+
+# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
+ -> bad word size
+# endif
+
+# ifdef PCR
+# undef DYNAMIC_LOADING
+# undef STACKBOTTOM
+# undef HEURISTIC1
+# undef HEURISTIC2
+# undef PROC_VDB
+# undef MPROTECT_VDB
+# define PCR_VDB
+# endif
+
+# ifdef SRC_M3
+ /* Postponed for now. */
+# undef PROC_VDB
+# undef MPROTECT_VDB
+# endif
+
+# ifdef SMALL_CONFIG
+ /* Presumably not worth the space it takes. */
+# undef PROC_VDB
+# undef MPROTECT_VDB
+# endif
+
+# ifdef USE_MUNMAP
+# undef MPROTECT_VDB /* Can't deal with address space holes. */
+# endif
+
+# ifdef PARALLEL_MARK
+# undef MPROTECT_VDB /* For now. */
+# endif
+
+# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
+# define DEFAULT_VDB
+# endif
+
+# ifndef PREFETCH
+# define PREFETCH(x)
+# define NO_PREFETCH
+# endif
+
+# ifndef PREFETCH_FOR_WRITE
+# define PREFETCH_FOR_WRITE(x)
+# define NO_PREFETCH_FOR_WRITE
+# endif
+
+# ifndef CACHE_LINE_SIZE
+# define CACHE_LINE_SIZE 32 /* Wild guess */
+# endif
+
+# ifdef LINUX
+# define REGISTER_LIBRARIES_EARLY
+ /* We sometimes use dl_iterate_phdr, which may acquire an internal */
+ /* lock. This isn't safe after the world has stopped. So we must */
+ /* call GC_register_dynamic_libraries before stopping the world. */
+ /* For performance reasons, this may be beneficial on other */
+ /* platforms as well, though it should be avoided in win32. */
+# endif /* LINUX */
+
+# if defined(SEARCH_FOR_DATA_START)
+ extern ptr_t GC_data_start;
+# define DATASTART GC_data_start
+# endif
+
+# ifndef CLEAR_DOUBLE
+# define CLEAR_DOUBLE(x) \
+ ((word*)x)[0] = 0; \
+ ((word*)x)[1] = 0;
+# endif /* CLEAR_DOUBLE */
+
+ /* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */
+# if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS)
+# define GC_SOLARIS_THREADS
+# endif
+
+# if defined(GC_IRIX_THREADS) && !defined(IRIX5)
+ --> inconsistent configuration
+# endif
+# if defined(GC_LINUX_THREADS) && !(defined(LINUX) || defined(NACL))
+ --> inconsistent configuration
+# endif
+# if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)
+ --> inconsistent configuration
+# endif
+# if defined(GC_HPUX_THREADS) && !defined(HPUX)
+ --> inconsistent configuration
+# endif
+# if defined(GC_AIX_THREADS) && !defined(_AIX)
+ --> inconsistent configuration
+# endif
+# if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32)
+ --> inconsistent configuration
+# endif
+
+# if defined(PCR) || defined(SRC_M3) || \
+ defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \
+ defined(GC_PTHREADS) || defined(SN_TARGET_PS3)
+# define THREADS
+# endif
+
+# if defined(HP_PA) || defined(M88K) \
+ || defined(POWERPC) && !defined(DARWIN) \
+ || defined(LINT) || defined(MSWINCE) || defined(ARM32) || defined(CRIS) \
+ || (defined(I386) && defined(__LCC__))
+ /* Use setjmp based hack to mark from callee-save registers. */
+ /* The define should move to the individual platform */
+ /* descriptions. */
+# define USE_GENERIC_PUSH_REGS
+# endif
+
+# if defined(MSWINCE)
+# define NO_GETENV
+# endif
+
+# if defined(SPARC)
+# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
+ /* include assembly code to do it well. */
+# endif
+
+ /* Can we save call chain in objects for debugging? */
+ /* SET NFRAMES (# of saved frames) and NARGS (#of args for each */
+ /* frame) to reasonable values for the platform. */
+ /* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified */
+ /* at build time, though we feel free to adjust it slightly. */
+ /* Define NEED_CALLINFO if we either save the call stack or */
+ /* GC_ADD_CALLER is defined. */
+ /* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */
+
+#if defined(SPARC)
+# define CAN_SAVE_CALL_ARGS
+#endif
+#if (defined(I386) || defined(X86_64)) && defined(LINUX)
+ /* SAVE_CALL_CHAIN is supported if the code is compiled to save */
+ /* frame pointers by default, i.e. no -fomit-frame-pointer flag. */
+# define CAN_SAVE_CALL_ARGS
+#endif
+
+# if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \
+ && defined(GC_CAN_SAVE_CALL_STACKS)
+# define SAVE_CALL_CHAIN
+# endif
+# ifdef SAVE_CALL_CHAIN
+# if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)
+# define NARGS SAVE_CALL_NARGS
+# else
+# define NARGS 0 /* Number of arguments to save for each call. */
+# endif
+# endif
+# ifdef SAVE_CALL_CHAIN
+# ifndef SAVE_CALL_COUNT
+# define NFRAMES 6 /* Number of frames to save. Even for */
+ /* alignment reasons. */
+# else
+# define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)
+# endif
+# define NEED_CALLINFO
+# endif /* SAVE_CALL_CHAIN */
+# ifdef GC_ADD_CALLER
+# define NFRAMES 1
+# define NARGS 0
+# define NEED_CALLINFO
+# endif
+
+# if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)
+# define DBG_HDRS_ALL
+# endif
+
+# if defined(POINTER_MASK) && !defined(POINTER_SHIFT)
+# define POINTER_SHIFT 0
+# endif
+
+# if defined(POINTER_SHIFT) && !defined(POINTER_MASK)
+# define POINTER_MASK ((GC_word)(-1))
+# endif
+
+# if !defined(FIXUP_POINTER) && defined(POINTER_MASK)
+# define FIXUP_POINTER(p) (p) = ((p) & (POINTER_MASK) << POINTER_SHIFT)
+# endif
+
+# if defined(FIXUP_POINTER)
+# define NEED_FIXUP_POINTER 1
+# else
+# define NEED_FIXUP_POINTER 0
+# define FIXUP_POINTER(p)
+# endif
+
+#ifdef GC_PRIVATE_H
+ /* This relies on some type definitions from gc_priv.h, from */
+ /* where it's normally included. */
+ /* */
+ /* How to get heap memory from the OS: */
+ /* Note that sbrk()-like allocation is preferred, since it */
+ /* usually makes it possible to merge consecutively allocated */
+ /* chunks. It also avoids unintented recursion with */
+ /* -DREDIRECT_MALLOC. */
+ /* GET_MEM() returns a HLKSIZE aligned chunk. */
+ /* 0 is taken to mean failure. */
+ /* In the case os USE_MMAP, the argument must also be a */
+ /* physical page size. */
+ /* GET_MEM is currently not assumed to retrieve 0 filled space, */
+ /* though we should perhaps take advantage of the case in which */
+ /* does. */
+ struct hblk; /* See gc_priv.h. */
+# ifdef PCR
+ char * real_malloc();
+# define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \
+ + GC_page_size-1)
+# else
+# ifdef OS2
+ void * os2_alloc(size_t bytes);
+# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \
+ + GC_page_size) \
+ + GC_page_size-1)
+# else
+# if defined(NEXT) || defined(DOS4GW) || \
+ (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \
+ (defined(SUNOS5) && !defined(USE_MMAP))
+# define GET_MEM(bytes) HBLKPTR((size_t) \
+ calloc(1, (size_t)bytes + GC_page_size) \
+ + GC_page_size-1)
+# else
+# ifdef MSWIN32
+ extern ptr_t GC_win32_get_mem();
+# define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
+# else
+# ifdef MACOS
+# if defined(USE_TEMPORARY_MEMORY)
+ extern Ptr GC_MacTemporaryNewPtr(size_t size,
+ Boolean clearMemory);
+# define GET_MEM(bytes) HBLKPTR( \
+ GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \
+ + GC_page_size-1)
+# else
+# define GET_MEM(bytes) HBLKPTR( \
+ NewPtrClear(bytes + GC_page_size) + GC_page_size-1)
+# endif
+# else
+# ifdef MSWINCE
+ extern ptr_t GC_wince_get_mem();
+# define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
+# else
+# if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
+ extern void *GC_amiga_get_mem(size_t size);
+# define GET_MEM(bytes) HBLKPTR((size_t) \
+ GC_amiga_get_mem((size_t)bytes + GC_page_size) \
+ + GC_page_size-1)
+# else
+# if defined(SN_TARGET_PS3)
+ extern void *ps3_get_mem (size_t size);
+# define GET_MEM(bytes) (struct hblk*) ps3_get_mem (bytes)
+# else
+ extern ptr_t GC_unix_get_mem(word size);
+# define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
+#endif
+# endif
+# endif
+# endif
+# endif
+# endif
+# endif
+# endif
+
+#endif /* GC_PRIVATE_H */
+
+#if defined(_AIX) && !defined(__GNUC__) && !defined(__STDC__)
+ /* IBMs xlc compiler doesn't appear to follow the convention of */
+ /* defining __STDC__ to be zero in extended mode. */
+# define __STDC__ 0
+#endif
+
+# endif /* GCCONFIG_H */
projects / mono.git / blobdiff