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a new version of the MEM_DEBUG

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This commit is contained in:
seyko 2015-05-12 11:56:39 +03:00
parent a98fd13090
commit 121e95d115
2 changed files with 195 additions and 30 deletions
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205
libtcc.c
View File

@ -198,17 +198,10 @@ PUB_FUNC char *tcc_fileextension (const char *name)
#undef malloc
#undef realloc
#ifdef MEM_DEBUG
ST_DATA int mem_cur_size;
ST_DATA int mem_max_size;
unsigned malloc_usable_size(void*);
#endif
#ifndef MEM_DEBUG
PUB_FUNC void tcc_free(void *ptr)
{
#ifdef MEM_DEBUG
mem_cur_size -= malloc_usable_size(ptr);
#endif
free(ptr);
}
@ -218,11 +211,6 @@ PUB_FUNC void *tcc_malloc(unsigned long size)
ptr = malloc(size);
if (!ptr && size)
tcc_error("memory full (malloc)");
#ifdef MEM_DEBUG
mem_cur_size += malloc_usable_size(ptr);
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
#endif
return ptr;
}
@ -237,18 +225,9 @@ PUB_FUNC void *tcc_mallocz(unsigned long size)
PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
{
void *ptr1;
#ifdef MEM_DEBUG
mem_cur_size -= malloc_usable_size(ptr);
#endif
ptr1 = realloc(ptr, size);
if (!ptr1 && size)
tcc_error("memory full (realloc)");
#ifdef MEM_DEBUG
/* NOTE: count not correct if alloc error, but not critical */
mem_cur_size += malloc_usable_size(ptr1);
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
#endif
return ptr1;
}
@ -262,11 +241,187 @@ PUB_FUNC char *tcc_strdup(const char *str)
PUB_FUNC void tcc_memstats(void)
{
#ifdef MEM_DEBUG
printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
#endif
}
#else
#define MEM_DEBUG_MAGIC1 0xFEEDDEB1
#define MEM_DEBUG_MAGIC2 0xFEEDDEB2
#define MEM_DEBUG_FILE_LEN 15
struct mem_debug_header {
size_t magic1;
size_t size;
struct mem_debug_header *prev;
struct mem_debug_header *next;
size_t line_num;
char file_name[MEM_DEBUG_FILE_LEN + 1];
size_t magic2;
};
typedef struct mem_debug_header mem_debug_header_t;
static mem_debug_header_t *mem_debug_chain;
static size_t mem_cur_size;
static size_t mem_max_size;
PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
{
void *ptr;
mem_debug_header_t *header;
ptr = malloc(sizeof(mem_debug_header_t) + size);
if (!ptr)
tcc_error("memory full (malloc)");
mem_cur_size += size;
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
header = (mem_debug_header_t *)ptr;
header->magic1 = MEM_DEBUG_MAGIC1;
header->magic2 = MEM_DEBUG_MAGIC2;
header->size = size;
header->line_num = line;
strncpy(header->file_name, file, MEM_DEBUG_FILE_LEN);
header->file_name[MEM_DEBUG_FILE_LEN] = 0;
header->next = mem_debug_chain;
header->prev = NULL;
if (header->next)
header->next->prev = header;
mem_debug_chain = header;
ptr = (char *)ptr + sizeof(mem_debug_header_t);
return ptr;
}
PUB_FUNC void tcc_free_debug(void *ptr)
{
mem_debug_header_t *header;
if (!ptr)
return;
ptr = (char *)ptr - sizeof(mem_debug_header_t);
header = (mem_debug_header_t *)ptr;
if (header->magic1 != MEM_DEBUG_MAGIC1 ||
header->magic2 != MEM_DEBUG_MAGIC2 ||
header->size == (size_t)-1 )
{
tcc_error("tcc_free check failed");
}
mem_cur_size -= header->size;
header->size = (size_t)-1;
if (header->next)
header->next->prev = header->prev;
if (header->prev)
header->prev->next = header->next;
if (header == mem_debug_chain)
mem_debug_chain = header->next;
free(ptr);
}
PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
{
void *ptr;
ptr = tcc_malloc_debug(size,file,line);
memset(ptr, 0, size);
return ptr;
}
PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
{
mem_debug_header_t *header;
int mem_debug_chain_update = 0;
if (!ptr) {
ptr = tcc_malloc_debug(size, file, line);
return ptr;
}
ptr = (char *)ptr - sizeof(mem_debug_header_t);
header = (mem_debug_header_t *)ptr;
if (header->magic1 != MEM_DEBUG_MAGIC1 ||
header->magic2 != MEM_DEBUG_MAGIC2 ||
header->size == (size_t)-1 )
{
check_error:
tcc_error("tcc_realloc check failed");
}
mem_debug_chain_update = (header == mem_debug_chain);
mem_cur_size -= header->size;
ptr = realloc(ptr, sizeof(mem_debug_header_t) + size);
if (!ptr)
tcc_error("memory full (realloc)");
header = (mem_debug_header_t *)ptr;
if (header->magic1 != MEM_DEBUG_MAGIC1 ||
header->magic2 != MEM_DEBUG_MAGIC2)
{
goto check_error;
}
mem_cur_size += size;
if (mem_cur_size > mem_max_size)
mem_max_size = mem_cur_size;
header->size = size;
if (header->next)
header->next->prev = header;
if (header->prev)
header->prev->next = header;
if (mem_debug_chain_update)
mem_debug_chain = header;
ptr = (char *)ptr + sizeof(mem_debug_header_t);
return ptr;
}
PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
{
char *ptr;
ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
strcpy(ptr, str);
return ptr;
}
PUB_FUNC void tcc_memstats(void)
{
if (mem_cur_size) {
mem_debug_header_t *header = mem_debug_chain;
fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
mem_cur_size, mem_max_size);
while (header) {
fprintf(stderr, " file %s, line %u: %u bytes\n",
header->file_name, header->line_num, header->size);
header = header->next;
}
}
}
#undef MEM_DEBUG_MAGIC1
#undef MEM_DEBUG_MAGIC2
#undef MEM_DEBUG_FILE_LEN
#endif
#define free(p) use_tcc_free(p)
#define malloc(s) use_tcc_malloc(s)
#define realloc(p, s) use_tcc_realloc(p, s)

20
tcc.h
View File

@ -1052,11 +1052,6 @@ ST_DATA int tcc_ext;
/* XXX: get rid of this ASAP */
ST_DATA struct TCCState *tcc_state;
#ifdef MEM_DEBUG
ST_DATA int mem_cur_size;
ST_DATA int mem_max_size;
#endif
#define AFF_PRINT_ERROR 0x0001 /* print error if file not found */
#define AFF_REFERENCED_DLL 0x0002 /* load a referenced dll from another dll */
#define AFF_PREPROCESS 0x0004 /* preprocess file */
@ -1067,11 +1062,26 @@ PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s);
PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num);
PUB_FUNC char *tcc_basename(const char *name);
PUB_FUNC char *tcc_fileextension (const char *name);
#ifndef MEM_DEBUG
PUB_FUNC void tcc_free(void *ptr);
PUB_FUNC void *tcc_malloc(unsigned long size);
PUB_FUNC void *tcc_mallocz(unsigned long size);
PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size);
PUB_FUNC char *tcc_strdup(const char *str);
#else
#define tcc_free(ptr) tcc_free_debug(ptr)
#define tcc_malloc(size) tcc_malloc_debug(size, __FILE__, __LINE__)
#define tcc_mallocz(size) tcc_mallocz_debug(size, __FILE__, __LINE__)
#define tcc_realloc(ptr,size) tcc_realloc_debug(ptr, size, __FILE__, __LINE__)
#define tcc_strdup(str) tcc_strdup_debug(str, __FILE__, __LINE__)
PUB_FUNC void tcc_free_debug(void *ptr);
PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line);
PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line);
PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line);
PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line);
#endif
#define free(p) use_tcc_free(p)
#define malloc(s) use_tcc_malloc(s)
#define realloc(p, s) use_tcc_realloc(p, s)