-/* vm/jit/code.c - codeinfo struct for representing compiled code
+/* src/vm/jit/code.c - codeinfo struct for representing compiled code
Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
Authors: Edwin Steiner
- Changes:
+ Changes: Christian Thalinger
$Id$
*/
+#include "config.h"
+#include "vm/types.h"
+
+#include <assert.h>
+
#include "vm/jit/code.h"
#include "mm/memory.h"
+#include "vm/options.h"
+#include "arch.h"
+
+
+/* code_codeinfo_new ***********************************************************
+
+ Create a new codeinfo for the given method.
+
+ IN:
+ m................method to create a new codeinfo for
+
+ The following fields are set in codeinfo:
+ m
+ isleafmethod
+ all other fields are zeroed
+
+ RETURN VALUE:
+ a new, initialized codeinfo, or
+ NULL if an exception occurred.
+
+*******************************************************************************/
codeinfo *code_codeinfo_new(methodinfo *m)
{
code = NEW(codeinfo);
- memset(code,0,sizeof(codeinfo));
-
code->m = m;
-
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ size_codeinfo += sizeof(codeinfo);
+#endif
+
return code;
}
+
+/* code_get_sync_slot_count ****************************************************
+
+ Return the number of stack slots used for storing the synchronized object
+ (and the return value around lock_monitor_exit calls) by the given code.
+
+ IN:
+ code.............the codeinfo of the code in question
+ (must be != NULL)
+
+ RETURN VALUE:
+ the number of stack slots used for synchronization
+
+*******************************************************************************/
+
+int code_get_sync_slot_count(codeinfo *code)
+{
+#ifdef ENABLE_THREADS
+ int count;
+
+ assert(code);
+
+ if (!checksync)
+ return 0;
+
+ if (!(code->m->flags & ACC_SYNCHRONIZED))
+ return 0;
+
+ count = 1;
+
+#ifdef HAS_4BYTE_STACKSLOT
+ /* long and double need 2 4-byte slots */
+ if (IS_2_WORD_TYPE(code->m->parseddesc->returntype.type))
+ count++;
+#endif
+
+#if defined(__POWERPC__)
+ /* powerpc needs an extra slot */
+ count++;
+#endif
+
+ return count;
+
+#else /* !ENABLE_THREADS */
+
+ return 0;
+
+#endif /* ENABLE_THREADS */
+}
+
+
+/* code_get_stack_frame_size ***************************************************
+
+ Return the number of stack slots that the stack frame of the given code
+ comprises.
+
+ IMPORTANT: The return value does *not* include the saved return address
+ slot, although it is part of non-leaf stack frames on RISC
+ architectures. The rationale behind this is that the saved
+ return address is never moved or changed by replacement, and
+ this way CISC and RISC architectures can be treated the same.
+ (See also doc/stack_frames.txt.)
+
+ IN:
+ code.............the codeinfo of the code in question
+ (must be != NULL)
+
+ RETURN VALUE:
+ the number of stack slots
+
+*******************************************************************************/
+
+int code_get_stack_frame_size(codeinfo *code)
+{
+#if 0
+ int count;
+
+ assert(code);
+
+ /* slots allocated by register allocator plus saved registers */
+
+#ifdef HAS_4BYTE_STACKSLOT
+ count = code->memuse + code->savedintcount + 2*code->savedfltcount;
+#else
+ count = code->memuse + code->savedintcount + code->savedfltcount;
+#endif
+
+ /* add slots needed in synchronized methods */
+
+ count += code_get_sync_slot_count(code);
+
+ /* keep stack aligned */
+
+#if defined(__X86_64__)
+ /* the x86_64 codegen only aligns the stack in non-leaf methods */
+ if (!code->isleafmethod || opt_verbosecall)
+ count |= 1; /* even when return address is added */
+#endif
+
+ /* XXX align stack on alpha */
+#if defined(__MIPS__)
+ if (code->isleafmethod)
+ count = (count + 1) & ~1;
+ else
+ count |= 1; /* even when return address is added */
+#endif
+
+#if defined(__POWERPC__)
+ /* keep stack 16-byte aligned */
+ count = (count + 3) & ~3;
+#endif
+
+ return count;
+#endif
+
+ return 0;
+}
+
+
+/* code_codeinfo_free **********************************************************
+
+ Free the memory used by a codeinfo.
+
+ IN:
+ code.............the codeinfo to free
+
+*******************************************************************************/
+
void code_codeinfo_free(codeinfo *code)
{
- if (!code)
+ if (code == NULL)
return;
- if (code->mcode)
+ if (code->mcode != NULL)
CFREE((void *) (ptrint) code->mcode, code->mcodelength);
- FREE(code,codeinfo);
+ replace_free_replacement_points(code);
+
+ FREE(code, codeinfo);
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ size_codeinfo -= sizeof(codeinfo);
+#endif
}
+
+/* code_free_code_of_method ****************************************************
+
+ Free all codeinfos of the given method
+
+ IN:
+ m................the method of which the codeinfos are to be freed
+
+*******************************************************************************/
+
void code_free_code_of_method(methodinfo *m)
{
codeinfo *nextcode;
codeinfo *code;
+
+ if (!m)
+ return;
nextcode = m->code;
while (nextcode) {
nextcode = code->prev;
code_codeinfo_free(code);
}
+
+ m->code = NULL;
}
/*
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