-/* src/mm/memory.c -
+/* src/mm/memory.c - memory management
- Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
- R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
- C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
- Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
+ C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
+ E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
+ J. Wenninger, Institut f. Computersprachen - TU Wien
This file is part of CACAO.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
-
- Contact: cacao@complang.tuwien.ac.at
-
- Authors: Reinhard Grafl
-
- Changes: Christian Thalinger
-
- $Id: memory.c 3552 2005-11-03 20:43:17Z twisti $
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
*/
+#include "config.h"
+
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/mman.h>
#if defined(__DARWIN__)
-/* If we compile with -ansi on darwin, <sys/types.h> is not included. So */
-/* let's do it here. */
+/* If we compile with -ansi on darwin, <sys/types.h> is not
+ included. So let's do it here. */
# include <sys/types.h>
#endif
-#include "config.h"
#include "vm/types.h"
#include "arch.h"
#include "mm/memory.h"
+
#include "native/native.h"
-#if defined(USE_THREADS)
-# if defined(NATIVE_THREADS)
-# include "threads/native/threads.h"
-# else
-# include "threads/green/threads.h"
-# endif
-#endif
+#include "threads/lock-common.h"
+#include "threads/threads-common.h"
#include "toolbox/logging.h"
+
#include "vm/exceptions.h"
#include "vm/global.h"
-#include "vm/options.h"
-#include "vm/statistics.h"
#include "vm/stringlocal.h"
+#include "vm/vm.h"
+
+#include "vmcore/options.h"
+
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/statistics.h"
+#endif
+
+
+/* constants for ENABLE_MEMCHECK **********************************************/
+
+#if defined(ENABLE_MEMCHECK)
+#define MEMORY_CANARY_SIZE 16
+#define MEMORY_CANARY_FIRST_BYTE 0xca
+#define MEMORY_CLEAR_BYTE 0xa5
+#endif /* defined(ENABLE_MEMCHECK) */
/*******************************************************************************
This structure is used for dump memory allocation if cacao
- runswithout threads.
+ runs without threads.
*******************************************************************************/
-#if !defined(USE_THREADS) || (defined(USE_THREADS) && !defined(NATIVE_THREADS))
-static dumpinfo _no_threads_dumpinfo;
+#if !defined(ENABLE_THREADS)
+static dumpinfo_t _no_threads_dumpinfo;
#endif
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
+#if defined(ENABLE_THREADS)
#define DUMPINFO &((threadobject *) THREADOBJECT)->dumpinfo
#else
#define DUMPINFO &_no_threads_dumpinfo
/* global code memory variables ***********************************************/
-#define DEFAULT_CODEMEM_SIZE 128 * 1024 /* defaulting to 128kB */
+#define DEFAULT_CODE_MEMORY_SIZE 128 * 1024 /* defaulting to 128kB */
-#if defined(USE_THREADS)
-static java_objectheader *codememlock = NULL;
+#if defined(ENABLE_THREADS)
+static java_object_t *lock_code_memory = NULL;
#endif
-static int codememsize = 0;
-static void *codememptr = NULL;
+static void *code_memory = NULL;
+static int code_memory_size = 0;
+static int pagesize = 0;
/* memory_init *****************************************************************
bool memory_init(void)
{
-#if defined(USE_THREADS)
- codememlock = NEW(java_objectheader);
+#if defined(ENABLE_THREADS)
+ /* create lock for code memory */
-# if defined(NATIVE_THREADS)
- initObjectLock(codememlock);
-# endif
+ lock_code_memory = NEW(java_object_t);
+
+ lock_init_object_lock(lock_code_memory);
#endif
+ /* get the pagesize of this architecture */
+
+ pagesize = getpagesize();
+
/* everything's ok */
return true;
}
+/* memory_mmap_anon ************************************************************
+
+ Maps anonymous memory, even on systems not defining
+ MAP_ANON(YMOUS).
+
+*******************************************************************************/
+
+void *memory_mmap_anon(void *addr, size_t len, int prot, int flags)
+{
+ void *p;
+
+#if defined(MAP_ANON) || defined(MAP_ANONYMOUS)
+ p = mmap(addr, len, prot,
+# if defined(MAP_ANON)
+ MAP_ANON | flags,
+# else
+ MAP_ANONYMOUS | flags,
+# endif
+ -1, 0);
+#else
+ int fd;
+
+ fd = open("/dev/zero", O_RDONLY, 0);
+
+ if (fd == -1)
+ vm_abort("memory_mmap_anon: open failed: %s", strerror(errno));
+
+ p = mmap(addr, len, prot, flags, fd, 0);
+#endif
+
+#if defined(MAP_FAILED)
+ if (p == MAP_FAILED)
+#else
+ if (p == (void *) -1)
+#endif
+ vm_abort("memory_mmap_anon: mmap failed: %s", strerror(errno));
+
+ return p;
+}
+
+
/* memory_checked_alloc ********************************************************
Allocated zeroed-out memory and does an OOM check.
+ ERROR HANDLING:
+ XXX If no memory could be allocated, this function justs *exists*.
+
*******************************************************************************/
static void *memory_checked_alloc(s4 size)
void *p = calloc(size, 1);
- if (!p)
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Out of memory");
+ if (p == NULL)
+ vm_abort("memory_checked_alloc: calloc failed: out of memory");
return p;
}
/* memory_cnew *****************************************************************
- Allocates memory from the heap, aligns it to architecutres PAGESIZE
- and make the memory read-, write-, and executeable.
+ Allocates memory from the heap via mmap and make the memory read-,
+ write-, and executeable.
*******************************************************************************/
void *memory_cnew(s4 size)
{
void *p;
- int pagesize;
-#if defined(USE_THREADS)
- builtin_monitorenter(codememlock);
-#endif
+ LOCK_MONITOR_ENTER(lock_code_memory);
- size = ALIGN(size, ALIGNSIZE);
+ size = MEMORY_ALIGN(size, ALIGNSIZE);
/* check if enough memory is available */
- if (size > codememsize) {
+ if (size > code_memory_size) {
/* set default code size */
- codememsize = DEFAULT_CODEMEM_SIZE;
+ code_memory_size = DEFAULT_CODE_MEMORY_SIZE;
/* do we need more? */
- if (size > codememsize)
- codememsize = size;
-
- /* get the pagesize of this architecture */
-
- pagesize = getpagesize();
+ if (size > code_memory_size)
+ code_memory_size = size;
- /* allocate normal heap memory */
+ /* align the size of the memory to be allocated */
- if ((p = memory_checked_alloc(codememsize + pagesize - 1)) == NULL)
- return NULL;
+ code_memory_size = MEMORY_ALIGN(code_memory_size, pagesize);
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
if (opt_stat) {
- codememusage += codememsize + pagesize - 1;
+ codememusage += code_memory_size;
if (codememusage > maxcodememusage)
maxcodememusage = codememusage;
}
#endif
- /* align the memory allocated to a multiple of PAGESIZE,
- mprotect requires this */
+ /* allocate the memory */
- p = (void *) (((ptrint) p + pagesize - 1) & ~(pagesize - 1));
-
- /* make the memory read-, write-, and executeable */
-
- if (mprotect(p, codememsize, PROT_READ | PROT_WRITE | PROT_EXEC) == -1)
- throw_cacao_exception_exit(string_java_lang_InternalError,
- strerror(errno));
+ p = memory_mmap_anon(NULL, code_memory_size,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_PRIVATE);
/* set global code memory pointer */
- codememptr = p;
+ code_memory = p;
}
/* get a memory chunk of the allocated memory */
- p = codememptr;
- codememptr = (void *) ((ptrint) codememptr + size);
- codememsize -= size;
+ p = code_memory;
-#if defined(USE_THREADS)
- builtin_monitorexit(codememlock);
-#endif
+ code_memory = (void *) ((ptrint) code_memory + size);
+ code_memory_size -= size;
+
+ LOCK_MONITOR_EXIT(lock_code_memory);
return p;
}
+/* memory_cfree ****************************************************************
+
+ Frees the code memory pointed to.
+
+ ATTENTION: This function currently does NOTHING! Because we don't
+ have a memory management for code memory.
+
+*******************************************************************************/
+
+void memory_cfree(void *p, s4 size)
+{
+ /* do nothing */
+}
+
+
void *mem_alloc(s4 size)
{
+ void *m;
+
if (size == 0)
return NULL;
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
if (opt_stat) {
memoryusage += size;
}
#endif
- return memory_checked_alloc(size);
+ m = memory_checked_alloc(size);
+
+#if defined(ENABLE_MEMCHECK)
+ /* XXX we would like to poison the memory, but callers rely on */
+ /* the zeroing. This should change sooner or later. */
+ /* memset(m, MEMORY_CLEAR_BYTE, size); */
+#endif
+
+ return m;
}
{
void *dst;
- if (!src) {
- if (len1 != 0) {
- log_text("reallocating memoryblock with address NULL, length != 0");
- assert(0);
- }
- }
+ /* prevent compiler warnings */
+
+ dst = NULL;
-#if defined(STATISTICS)
+ if (src == NULL)
+ if (len1 != 0)
+ vm_abort("mem_realloc: reallocating memoryblock with address NULL, length != 0");
+
+#if defined(ENABLE_STATISTICS)
if (opt_stat)
memoryusage = (memoryusage - len1) + len2;
#endif
+#if defined(ENABLE_MEMCHECK)
+ if (len2 < len1)
+ memset((u1*)dst + len2, MEMORY_CLEAR_BYTE, len1 - len2);
+#endif
+
dst = realloc(src, len2);
- if (!dst)
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Out of memory");
+ if (dst == NULL)
+ vm_abort("mem_realloc: realloc failed: out of memory");
+
+#if defined(ENABLE_MEMCHECK)
+ if (len2 > len1)
+ memset((u1*)dst + len1, MEMORY_CLEAR_BYTE, len2 - len1);
+#endif
return dst;
}
assert(0);
}
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
if (opt_stat)
memoryusage -= size;
#endif
+#if defined(ENABLE_MEMCHECK)
+ /* destroy the contents */
+ memset(m, MEMORY_CLEAR_BYTE, size);
+#endif
+
free(m);
}
+/* memory_thread ***************************************************************
+
+ Prints regularly memory statistics.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS) && !defined(NDEBUG)
+static void memory_thread(void)
+{
+ int32_t seconds;
+
+ /* If both arguments are specified, use the value of
+ ProfileMemoryUsage. */
+
+ if (opt_ProfileGCMemoryUsage)
+ seconds = opt_ProfileGCMemoryUsage;
+
+ if (opt_ProfileMemoryUsage)
+ seconds = opt_ProfileMemoryUsage;
+
+ while (true) {
+ /* sleep thread */
+
+ threads_sleep(seconds * 1000, 0);
+
+# if defined(ENABLE_STATISTICS)
+ /* Print current date and time (only when we print to the
+ stdout). */
+
+ if (!opt_ProfileMemoryUsageGNUPlot)
+ statistics_print_date();
+
+ /* print memory usage */
+
+ if (opt_ProfileMemoryUsage)
+ statistics_print_memory_usage();
+
+ /* print GC memory usage */
+
+ if (opt_ProfileGCMemoryUsage)
+ statistics_print_gc_memory_usage();
+# endif
+ }
+}
+#endif
+
+
+/* memory_start_thread *********************************************************
+
+ Starts the memory profiling thread.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS) && !defined(NDEBUG)
+bool memory_start_thread(void)
+{
+ utf *name;
+
+ name = utf_new_char("Memory Profiler");
+
+ /* start the memory profiling thread */
+
+ if (!threads_thread_start_internal(name, memory_thread))
+ return false;
+
+ /* everything's ok */
+
+ return true;
+}
+#endif
+
+
+/* dump_check_canaries *********************************************************
+
+ Check canaries in dump memory.
+
+ IN:
+ di...........dumpinfo_t * of the dump area to check
+ bottomsize...dump size down to which the dump area should be checked
+ (specify 0 to check the whole dump area)
+
+ ERROR HANDLING:
+ If any canary has been changed, this function aborts the VM with
+ an error message.
+
+*******************************************************************************/
+
+#if defined(ENABLE_MEMCHECK)
+void dump_check_canaries(dumpinfo_t *di, s4 bottomsize)
+{
+ dump_allocation_t *da;
+ u1 *pm;
+ s4 i, j;
+
+ /* iterate over all dump memory allocations above bottomsize */
+
+ da = di->allocations;
+ while (da && da->useddumpsize >= bottomsize) {
+ /* check canaries */
+
+ pm = da->mem - MEMORY_CANARY_SIZE;
+ for (i=0; i<MEMORY_CANARY_SIZE; ++i)
+ if (pm[i] != i + MEMORY_CANARY_FIRST_BYTE) {
+ fprintf(stderr, "canary bytes:");
+ for (j=0; j<MEMORY_CANARY_SIZE; ++j)
+ fprintf(stderr, " %02x", pm[j]);
+ fprintf(stderr,"\n");
+ vm_abort("error: dump memory bottom canary killed: "
+ "%p (%d bytes allocated at %p)\n",
+ pm + i, da->size, da->mem);
+ }
+
+ pm = da->mem + da->size;
+ for (i=0; i<MEMORY_CANARY_SIZE; ++i)
+ if (pm[i] != i + MEMORY_CANARY_FIRST_BYTE) {
+ fprintf(stderr, "canary bytes:");
+ for (j=0; j<MEMORY_CANARY_SIZE; ++j)
+ fprintf(stderr, " %02x", pm[j]);
+ fprintf(stderr,"\n");
+ vm_abort("error: dump memory top canary killed: "
+ "%p (%d bytes allocated at %p)\n",
+ pm + i, da->size, da->mem);
+ }
+
+ da = da->next;
+ }
+}
+#endif /* defined(ENABLE_MEMCHECK) */
+
+
/* dump_alloc ******************************************************************
- XXX
+ Allocate memory in the dump area.
+
+ IN:
+ size.........size of block to allocate, in bytes
+ may be zero, in which case NULL is returned
+
+ RETURN VALUE:
+ pointer to allocated memory, or
+ NULL iff `size` was zero
+
+ ERROR HANDLING:
+ XXX This function uses `memory_checked_alloc`, which *exits* if no
+ memory could be allocated.
+
+ THREADS:
+ dump_alloc is thread safe. Each thread has its own dump memory area.
+
+ dump_alloc is a fast allocator suitable for scratch memory that can be
+ collectively freed when the current activity (eg. compiling) is done.
+
+ You cannot selectively free dump memory. Before you start allocating it,
+ you remember the current size returned by `dump_size`. Later, when you no
+ longer need the memory, call `dump_release` with the remembered size and
+ all dump memory allocated since the call to `dump_size` will be freed.
*******************************************************************************/
void *dump_alloc(s4 size)
{
#if defined(DISABLE_DUMP)
+
/* use malloc memory for dump memory (for debugging only!) */
return mem_alloc(size);
-#else
- void *m;
- dumpinfo *di;
+
+#else /* !defined(DISABLE_DUMP) */
+
+ void *m;
+ dumpinfo_t *di;
+#if defined(ENABLE_MEMCHECK)
+ s4 origsize = size; /* needed for the canary system */
+#endif
/* If no threads are used, the dumpinfo structure is a static structure */
/* defined at the top of this file. */
if (size == 0)
return NULL;
- size = ALIGN(size, ALIGNSIZE);
+#if defined(ENABLE_MEMCHECK)
+ size += 2*MEMORY_CANARY_SIZE;
+#endif
+
+ size = MEMORY_ALIGN(size, ALIGNSIZE);
if (di->useddumpsize + size > di->allocateddumpsize) {
- dumpblock *newdumpblock;
+ dumpblock_t *newdumpblock;
s4 newdumpblocksize;
/* allocate a new dumplist structure */
- newdumpblock = memory_checked_alloc(sizeof(dumpblock));
+ newdumpblock = memory_checked_alloc(sizeof(dumpblock_t));
/* If requested size is greater than the default, make the new dump */
/* block as big as the size requested. Else use the default size. */
di->allocateddumpsize += newdumpblocksize;
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
/* the amount of globally allocated dump memory (thread save) */
if (opt_stat)
m = di->currentdumpblock->dumpmem + di->currentdumpblock->size -
(di->allocateddumpsize - di->useddumpsize);
+#if defined(ENABLE_MEMCHECK)
+ {
+ dump_allocation_t *da = NEW(dump_allocation_t);
+ s4 i;
+ u1 *pm;
+
+ /* add the allocation to our linked list of allocations */
+
+ da->next = di->allocations;
+ da->mem = (u1*) m + MEMORY_CANARY_SIZE;
+ da->size = origsize;
+ da->useddumpsize = di->useddumpsize;
+
+ di->allocations = da;
+
+ /* write the canaries */
+
+ pm = (u1*)m;
+ for (i=0; i<MEMORY_CANARY_SIZE; ++i)
+ pm[i] = i + MEMORY_CANARY_FIRST_BYTE;
+ pm = da->mem + da->size;
+ for (i=0; i<MEMORY_CANARY_SIZE; ++i)
+ pm[i] = i + MEMORY_CANARY_FIRST_BYTE;
+
+ /* make m point after the bottom canary */
+
+ m = (u1*)m + MEMORY_CANARY_SIZE;
+
+ /* clear the memory */
+
+ memset(m, MEMORY_CLEAR_BYTE, da->size);
+ }
+#endif /* defined(ENABLE_MEMCHECK) */
+
/* increase used dump size by the allocated memory size */
di->useddumpsize += size;
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
if (opt_stat)
if (di->useddumpsize > maxdumpsize)
maxdumpsize = di->useddumpsize;
#endif
-
+
return m;
+
#endif /* defined(DISABLE_DUMP) */
}
/* dump_realloc ****************************************************************
- XXX
+ Stupid realloc implementation for dump memory. Avoid, if possible.
*******************************************************************************/
memcpy(dst, src, len1);
+#if defined(ENABLE_MEMCHECK)
+ /* destroy the source */
+ memset(src, MEMORY_CLEAR_BYTE, len1);
+#endif
+
return dst;
#endif
}
/* dump_release ****************************************************************
- XXX
+ Release dump memory above the given size.
+
+ IN:
+ size........All dump memory above this mark will be freed. Usually
+ `size` will be the return value of a `dump_size` call
+ made earlier.
+
+ ERROR HANDLING:
+ XXX If the given size is invalid, this function *exits* with an
+ error message.
+
+ See `dump_alloc`.
*******************************************************************************/
void dump_release(s4 size)
{
#if defined(DISABLE_DUMP)
+
/* use malloc memory for dump memory (for debugging only!) */
/* do nothing */
-#else
- dumpinfo *di;
+
+#else /* !defined(DISABLE_DUMP) */
+
+ dumpinfo_t *di;
/* If no threads are used, the dumpinfo structure is a static structure */
/* defined at the top of this file. */
di = DUMPINFO;
- if (size < 0 || size > di->useddumpsize)
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Illegal dump release size %d", size);
+ if ((size < 0) || (size > di->useddumpsize))
+ vm_abort("Illegal dump release size: %d", size);
+
+#if defined(ENABLE_MEMCHECK)
+ {
+ dump_allocation_t *da, *next;
+
+ /* check canaries */
+
+ dump_check_canaries(di, size);
+
+ /* iterate over all dump memory allocations about to be released */
+
+ da = di->allocations;
+ while (da && da->useddumpsize >= size) {
+ next = da->next;
+
+ /* invalidate the freed memory */
+
+ memset(da->mem, MEMORY_CLEAR_BYTE, da->size);
+
+ FREE(da, dump_allocation_t);
+
+ da = next;
+ }
+ di->allocations = da;
+ }
+#endif /* defined(ENABLE_MEMCHECK) */
/* reset the used dump size to the size specified */
di->useddumpsize = size;
while (di->currentdumpblock && di->allocateddumpsize - di->currentdumpblock->size >= di->useddumpsize) {
- dumpblock *tmp = di->currentdumpblock;
-
-#if 0
- /* XXX TWISTI: can someone explain this to me? */
-#ifdef TRACECALLARGS
- /* Keep the first dumpblock if we don't free memory. Otherwise
- * a new dumpblock is allocated each time and we run out of
- * memory.
- */
- if (!oldtop->prev) break;
-#endif
-#endif
+ dumpblock_t *tmp = di->currentdumpblock;
di->allocateddumpsize -= tmp->size;
di->currentdumpblock = tmp->prev;
-#if defined(STATISTICS)
+#if defined(ENABLE_STATISTICS)
/* the amount of globally allocated dump memory (thread save) */
if (opt_stat)
free(tmp->dumpmem);
free(tmp);
}
+
#endif /* defined(DISABLE_DUMP) */
}
/* dump_size *******************************************************************
- XXX
+ Return the current size of the dump memory area. See `dump_alloc`.
*******************************************************************************/
/* use malloc memory for dump memory (for debugging only!) */
return 0;
-#else
- dumpinfo *di;
+
+#else /* !defined(DISABLE_DUMP) */
+
+ dumpinfo_t *di;
/* If no threads are used, the dumpinfo structure is a static structure */
/* defined at the top of this file. */
di = DUMPINFO;
- if (!di)
+ if (di == NULL)
return 0;
return di->useddumpsize;
+
#endif /* defined(DISABLE_DUMP) */
}
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
projects / cacao.git / blobdiff