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/***************************************************************************
*
* This file is covered by a dual licence. You can choose whether you
* want to use it according to the terms of the GNU GPL version 2, or
* under the terms of Zorp Professional Firewall System EULA located
* on the Zorp installation CD.
*
* $Id: memtrace.c,v 1.38 2004/08/18 12:06:40 sasa Exp $
*
* Author : Bazsi
* Auditor :
* Last audited version:
* Notes:
*
***************************************************************************/
#include <zorp/misc.h>
#include <zorp/zorplib.h>
#if ZORPLIB_ENABLE_MEM_TRACE
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include <assert.h>
#include <fcntl.h>
#include <stdarg.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <time.h>
#include <string.h>
#if HAVE_BACKTRACE
# include <execinfo.h>
#else
# define backtrace(a, b) {a[0]=NULL}
#endif
#define MEMTRACE_BACKTRACE_LEN 64
#define MEMTRACE_BACKTRACE_BUF_LEN (MEMTRACE_BACKTRACE_LEN * ((sizeof(gpointer) * 2) + 2 + 1) + 1)
#define MEMTRACE_CANARY_SIZE 2
#define MEMTRACE_CANARY_FILL 0xcd
#define MEMTRACE_CANARY_CHECK 0xcdcdcdcd
#define MEMTRACE_CANARY_OVERHEAD sizeof(ZMemTraceCanary) * 2
/**
* Trace the memory usage of the program using libzorpll
*
* @todo FIXME: May we use valgrind instead?
**/
#define ZORP_ENV_MEMTRACE "ZORP_MEMTRACE"
/**
* Set some canaries before and after the allocated memory
* and check it when a pointer deallocated.
**/
#define ZORP_ENV_MEMTRACE_CANARIES "ZORP_MEMTRACE_CANARIES"
/**
* Don't deallocate pointers, just fill it with the canaries
* It's useful when checking for heap corruption
**/
#define ZORP_ENV_MEMTRACE_HARD "ZORP_MEMTRACE_HARD"
/**
* Log all allocation and deallocation events.
**/
#define ZORP_ENV_MEMTRACE_FULL "ZORP_MEMTRACE_FULL"
typedef struct _ZMemTraceCanary
{
gsize size;
gsize neg_size;
guint32 canary[MEMTRACE_CANARY_SIZE];
} ZMemTraceCanary;
typedef struct _ZMemTraceEntry
{
guint32 next;
gpointer ptr;
gsize size;
gpointer backtrace[MEMTRACE_BACKTRACE_LEN];
gboolean deleted;
} ZMemTraceEntry;
typedef struct _ZMemTraceHead
{
guint32 list;
GStaticMutex lock;
gulong size;
} ZMemTraceHead;
#define MEMTRACE_HASH_SIZE 32768
#define MEMTRACE_HASH_MASK (32767 << 3)
#define MEMTRACE_HASH_SHIFT 3
/**
* At most this amount of blocks can be allocated at the same time.
* This preallocates MEMTRACE_HEAP_SIZE * sizeof(ZMemTraceEntry),
* which is 268 bytes currently in i386. (17MB)
**/
#define MEMTRACE_HEAP_SIZE 300000
#define MEMTRACE_TEMP_HEAP_SIZE 65536
/**< If not enough 131072 */
#define MEMTRACE_EOL ((guint32) -1)
ZMemTraceHead mem_trace_hash[MEMTRACE_HASH_SIZE];
ZMemTraceEntry mem_trace_heap[MEMTRACE_HEAP_SIZE];
guint32 mem_trace_free_list = MEMTRACE_EOL;
guint32 mem_block_count = 0, mem_allocated_size = 0, mem_alloc_count = 0;
gboolean mem_trace_initialized = FALSE;
static GStaticMutex mem_trace_lock = G_STATIC_MUTEX_INIT;
gchar mem_trace_filename[1024] = ZORPLIB_TEMP_DIR "/zorp-memtrace.log";
gboolean mem_trace_canaries = FALSE;
gboolean mem_trace_hard = FALSE;
gboolean really_trace_malloc = FALSE;
gboolean mem_trace = FALSE;
gchar temp_heap[MEMTRACE_TEMP_HEAP_SIZE];
gint temp_brk = 0;
gint mem_trace_recurse = 0;
#define TMP_ALLOCATED(ptr) (((unsigned int )((char *) ptr - temp_heap)) < MEMTRACE_TEMP_HEAP_SIZE)
void *(*old_malloc)(size_t size);
void (*old_free)(void *ptr);
void *(*old_realloc)(void *ptr, size_t size);
void *(*old_calloc)(size_t nmemb, size_t size);
static void z_mem_trace_printf(char *format, ...);
/**
* Save pointers to original free, realloc, calloc and malloc.
**/
static void
z_mem_trace_init_pointers(void)
{
dlerror();
old_free = dlsym(RTLD_NEXT, "free");
if (dlerror() != NULL)
assert(0);
old_realloc = dlsym(RTLD_NEXT, "realloc");
old_calloc = dlsym(RTLD_NEXT, "calloc");
old_malloc = dlsym(RTLD_NEXT, "malloc");
}
/**
* Internal function to initialize memtrace globals.
*
* Only the first call will have any effect (unless mem_trace_initialize
* is somehow unset again).
**/
static void
z_mem_trace_init_internal(void)
{
int i;
if (!mem_trace_initialized)
{
#if defined(__AMD64__) || defined(AMD64) || defined (__x86_64__)
gpointer temp_buf[10];
#endif /* __amd64__ */
mem_trace_initialized = TRUE;
#if defined(__AMD64__) || defined(AMD64) || defined (__x86_64__)
backtrace(temp_buf, 5);
#endif /* __amd64__ */
z_mem_trace_init_pointers();
if (getenv(ZORP_ENV_MEMTRACE))
{
mem_trace = TRUE;
if (getenv(ZORP_ENV_MEMTRACE_CANARIES))
mem_trace_canaries = TRUE;
if (getenv(ZORP_ENV_MEMTRACE_HARD))
mem_trace_hard = TRUE;
if (getenv(ZORP_ENV_MEMTRACE_FULL))
really_trace_malloc = TRUE;
for (i = 0; i < MEMTRACE_HEAP_SIZE; i++)
{
mem_trace_heap[i].next = i + 1;
}
mem_trace_heap[MEMTRACE_HEAP_SIZE - 1].next = MEMTRACE_EOL;
mem_trace_free_list = 0;
for (i = 0; i < MEMTRACE_HASH_SIZE; i++)
{
mem_trace_hash[i].list = MEMTRACE_EOL;
g_static_mutex_init(&mem_trace_hash[i].lock);
}
}
}
}
/**
* If the ZORP_ENV_MEMTRACE environment variable says memtrace is needed,
* set mem_trace and set the trace file name with full path.
*
* @param[in] tracefile basename of the trace file.
**/
void
z_mem_trace_init(gchar *tracefile)
{
z_mem_trace_init_internal();
if (tracefile && mem_trace)
{
g_snprintf(mem_trace_filename, sizeof(mem_trace_filename), ZORPLIB_TEMP_DIR "/%s", tracefile);
z_mem_trace_printf("MemTrace initialized; memtrace='%s', canaries='%s', keep_deleted='%s', full_log='%s'\n",
YES_NO_STR(mem_trace), YES_NO_STR(mem_trace_canaries), YES_NO_STR(mem_trace_hard), YES_NO_STR(really_trace_malloc));
}
}
static guint32
z_mem_trace_hash(gpointer ptr)
{
return (guint32)((gsize)ptr & MEMTRACE_HASH_MASK) >> MEMTRACE_HASH_SHIFT;
}
#if defined(__i386__)
/**
* Produce a backtrace from the stack into backtrace.
*
* @param[out] backtrace backtrace will be placed here.
*
* x86 version.
**/
void
z_mem_trace_bt(gpointer backt[])
{
gpointer x;
gpointer *ebp;
gint i = 0;
#if defined(__i386)
__asm__("mov %%ebp, %0\n": "=r"(ebp));
#else
#if defined(__AMD64__) || defined(AMD64) || defined(__x86_64__)
__asm__("mov %%rbp, %0\n": "=r"(ebp));
#endif
#endif
while ((ebp > &x) && *ebp && *(ebp + 1) && i < MEMTRACE_BACKTRACE_LEN - 1)
{
gpointer value = *(ebp + 1);
backt[i] = value;
i++;
ebp = *ebp;
}
backt[i] = NULL;
}
#else
#if defined(__AMD64__) || defined(AMD64) || defined(__x86_64__)
void
z_mem_trace_bt(gpointer backt[])
{
gpointer btrace[MEMTRACE_BACKTRACE_LEN + 1];
gint i = 0;
gint length;
length = backtrace(btrace, MEMTRACE_BACKTRACE_LEN);
while (btrace[i] && i < length && i < MEMTRACE_BACKTRACE_LEN - 1)
{
backt[i] = btrace[i];
i++;
}
backt[i] = NULL;
}
#else
#if defined(__sparc__)
/**
* Produce a backtrace from the stack into backtrace.
*
* @param[out] backt backtrace will be placed here.
*
* SPARC version.
**/
void
z_mem_trace_bt(gpointer backt[])
{
gpointer x;
gpointer *fp;
gint i = 0;
__asm__("mov %%fp, %0\n": "=r"(fp));
while ((fp > &x) && *fp && i < MEMTRACE_BACKTRACE_LEN - 1)
{
gpointer value = *(fp + 16);
backt[i] = value;
i++;
fp = *(fp + 15);
}
backt[i] = NULL;
}
#else
/* Stack is not known do dummy backtrace */
/**
* Produce a backtrace from the stack into backt -- except stack is unknown so this is a dummy.
*
* @param[out] backt instead of backtrace, a single NULL will be placed here.
*
* Unknown architecture version.
**/
void
z_mem_trace_bt(gpointer backt[])
{
backt[0] = NULL;
}
#endif /* __sparc__ */
#endif /* __x86_64__ */
#endif /* __i386__ */
/**
* Format backtrace into a printable string format.
*
* @param[in] backt the backtrace
* @param[out] buf buffer to receive the string
* @param[in] buflen size of buffer
*
* @returns a pointer to the string (same as buf)
**/
static char *
z_mem_trace_format_bt(gpointer backt[], gchar *buf, guint buflen)
{
gchar *p = buf;
gint i, len;
p[0] = '\0';
for (i = 0; i < MEMTRACE_BACKTRACE_LEN && buflen >= (sizeof(gpointer) * 2) + 3 && backt[i]; i++)
{
len = g_snprintf(buf, buflen, "%p,", backt[i]);
buf += len;
buflen -= len;
}
return p;
}
/**
* Write a line to the memtrace log if memtrace is enabled.
*
* @param[in] format printf-like format string
*
* The format string and the rest of the parameters are expected to be like those of *printf.
**/
static void
z_mem_trace_printf(char *format, ...)
{
gchar buf[1024];
gint len;
va_list l;
gint mem_trace_log_fd = -1;
if (mem_trace)
{
va_start(l, format);
len = vsnprintf(buf, sizeof(buf), format, l);
va_end(l);
mem_trace_log_fd = open(mem_trace_filename, O_CREAT | O_WRONLY | O_APPEND, 0600);
if (mem_trace_log_fd != -1)
{
write(mem_trace_log_fd, buf, len);
close(mem_trace_log_fd);
}
}
}
/**
* Log statistics to the memtrace log.
**/
void
z_mem_trace_stats(void)
{
z_mem_trace_printf("time: %d, allocs: %ld, blocks: %ld, size: %ld\n", time(NULL), mem_alloc_count, mem_block_count, mem_allocated_size);
}
static gpointer z_mem_trace_check_canaries(gpointer ptr);
void
z_mem_trace_dump()
{
int i;
if (mem_trace)
{
z_mem_trace_printf("memdump begins\n");
for (i = 0; i < MEMTRACE_HASH_SIZE; i++)
{
ZMemTraceHead *head = &mem_trace_hash[i];
ZMemTraceEntry *entry;
guint32 cur;
g_static_mutex_lock(&head->lock);
cur = head->list;
while (cur != MEMTRACE_EOL)
{
char backtrace_buf[MEMTRACE_BACKTRACE_BUF_LEN];
entry = &mem_trace_heap[cur];
z_mem_trace_printf("ptr=%p, size=%d, deleted=%s backtrace=%s\n", entry->ptr, entry->size, entry->deleted ? "TRUE" : "FALSE", z_mem_trace_format_bt(entry->backtrace, backtrace_buf, sizeof(backtrace_buf)));
if (mem_trace_canaries)
{
z_mem_trace_check_canaries(entry->ptr);
}
if (mem_trace_hard && entry->deleted)
{
guint j;
for (j = 0; j < entry->size; j++)
{
if (*((unsigned char *)(entry->ptr) + j) != MEMTRACE_CANARY_FILL)
{
z_mem_trace_printf("Using freed pointer; ptr=%p\n", entry->ptr);
}
}
}
cur = entry->next;
}
g_static_mutex_unlock(&head->lock);
}
}
}
/**
* Fill areas before and after specified area with canary values.
*
* @param[in] ptr raw pointer
* @param[in] size original size
*
* @returns the pointer to be returned
**/
static gpointer
z_mem_trace_fill_canaries(gpointer ptr, gint size)
{
if (!ptr)
return ptr;
if (mem_trace_canaries)
{
ZMemTraceCanary *p_before = (ZMemTraceCanary *) ptr;
ZMemTraceCanary *p_after = (ZMemTraceCanary *)(((gchar *) ptr) + sizeof(ZMemTraceCanary) + size);
memset(p_before->canary, MEMTRACE_CANARY_FILL, sizeof(p_before->canary));
memset(p_after->canary, MEMTRACE_CANARY_FILL, sizeof(p_after->canary));
p_before->size = p_after->size = size;
p_before->neg_size = p_after->neg_size = -size;
return (gpointer) (p_before + 1);
}
else
return ptr;
}
/**
* Aborts the process if the canaries are touched.
*
* @param[in] ptr user pointer
*
* @returns the pointer to be freed
**/
static gpointer
z_mem_trace_check_canaries(gpointer ptr)
{
if (!ptr)
return ptr;
if (mem_trace_canaries)
{
ZMemTraceCanary *p_before = ((ZMemTraceCanary *) ptr) - 1;
ZMemTraceCanary *p_after;
int i;
if (p_before->size != -p_before->neg_size)
{
z_mem_trace_printf("Inconsistency in canaries; ptr=%p\n", ptr);
abort();
}
p_after = (ZMemTraceCanary *) (((gchar *) ptr) + p_before->size);
if (p_after->size != p_before->size ||
p_after->neg_size != p_before->neg_size)
{
z_mem_trace_printf("Inconsistency in canaries; ptr=%p\n", ptr);
abort();
}
for (i = 0; i < MEMTRACE_CANARY_SIZE; i++)
{
if (p_before->canary[i] != p_after->canary[i] ||
p_before->canary[i] != MEMTRACE_CANARY_CHECK)
{
z_mem_trace_printf("Touched canary; ptr=%p\n", ptr);
abort();
}
}
return (gpointer) p_before;
}
return ptr;
}
static gboolean
z_mem_trace_add(gpointer ptr, gint size, gpointer backt[])
{
guint32 hash, new_ndx;
ZMemTraceEntry *new;
ZMemTraceHead *head;
static time_t prev_stats = 0, now;
hash = z_mem_trace_hash(ptr);
g_static_mutex_lock(&mem_trace_lock);
if (mem_trace_free_list == MEMTRACE_EOL)
{
g_static_mutex_unlock(&mem_trace_lock);
return FALSE;
}
mem_block_count++;
mem_alloc_count++;
now = time(NULL);
if (now != prev_stats)
{
prev_stats = now;
z_mem_trace_stats();
}
mem_allocated_size += size;
new_ndx = mem_trace_free_list;
new = &mem_trace_heap[new_ndx];
mem_trace_free_list = mem_trace_heap[mem_trace_free_list].next;
g_static_mutex_unlock(&mem_trace_lock);
new->ptr = ptr;
new->size = size;
memmove(new->backtrace, backt, sizeof(new->backtrace));
head = &mem_trace_hash[hash];
g_static_mutex_lock(&head->lock);
new->next = head->list;
head->list = new_ndx;
g_static_mutex_unlock(&head->lock);
if (really_trace_malloc)
{
gchar buf[1024];
z_mem_trace_printf("memtrace addblock; ptr='%p', size='%d', bt='%s'\n",
ptr, size, z_mem_trace_format_bt(backt, buf, sizeof(buf)));
}
return TRUE;
}
static gboolean
z_mem_trace_del(gpointer ptr, gpointer bt[])
{
guint32 hash, *prev, cur;
ZMemTraceHead *head;
ZMemTraceEntry *entry;
hash = z_mem_trace_hash(ptr);
head = &mem_trace_hash[hash];
g_static_mutex_lock(&head->lock);
prev = &head->list;
cur = head->list;
while (cur != MEMTRACE_EOL && mem_trace_heap[cur].ptr != ptr)
{
prev = &mem_trace_heap[cur].next;
cur = mem_trace_heap[cur].next;
}
if (cur == MEMTRACE_EOL)
{
g_static_mutex_unlock(&head->lock);
return FALSE;
}
if (!mem_trace_hard)
*prev = mem_trace_heap[cur].next;
g_static_mutex_unlock(&head->lock);
g_static_mutex_lock(&mem_trace_lock);
entry = &mem_trace_heap[cur];
if (really_trace_malloc)
{
gchar buf[1024];
z_mem_trace_printf("memtrace delblock; ptr='%p', size='%d', bt='%s'\n", (void *) entry->ptr, entry->size, z_mem_trace_format_bt(bt, buf, sizeof(buf)));
}
if (!mem_trace_hard)
{
mem_trace_heap[cur].next = mem_trace_free_list;
mem_trace_free_list = cur;
mem_block_count--;
mem_allocated_size -= mem_trace_heap[cur].size;
}
else
{
entry->deleted = TRUE;
}
g_static_mutex_unlock(&mem_trace_lock);
return TRUE;
}
static inline guint32
z_mem_trace_lookup_chain(gpointer ptr, ZMemTraceHead *head)
{
guint32 cur = MEMTRACE_EOL;
cur = head->list;
while (cur != MEMTRACE_EOL && mem_trace_heap[cur].ptr != ptr)
{
cur = mem_trace_heap[cur].next;
}
return cur;
}
static int
z_mem_trace_getsize(gpointer ptr)
{
guint32 hash, cur;
int size;
ZMemTraceHead *head;
hash = z_mem_trace_hash(ptr);
head = &mem_trace_hash[hash];
g_static_mutex_lock(&head->lock);
cur = z_mem_trace_lookup_chain(ptr, head);
if (cur != MEMTRACE_EOL)
{
size = mem_trace_heap[cur].size;
g_static_mutex_unlock(&head->lock);
return size;
}
g_static_mutex_unlock(&head->lock);
return -1;
}
void *
z_malloc(size_t size, gpointer backt[])
{
gpointer raw_ptr, user_ptr;
gchar buf[MEMTRACE_BACKTRACE_BUF_LEN];
guint backtrace_info = 0;
z_mem_trace_init_internal();
if (old_malloc == NULL)
{
raw_ptr = &temp_heap[temp_brk];
temp_brk += size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD;
if (temp_brk > MEMTRACE_TEMP_HEAP_SIZE)
{
backtrace_info = temp_brk;
temp_brk = 0;
assert(backtrace_info == 0);
}
}
else
raw_ptr = old_malloc(size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD);
if (mem_trace)
{
user_ptr = z_mem_trace_fill_canaries(raw_ptr, size);
if (mem_trace_hard && z_mem_trace_getsize(user_ptr) != -1)
{
z_mem_trace_printf("Duplicate memory block; backtrace='%s'\n",
z_mem_trace_format_bt(backt, buf, sizeof(buf)));
abort();
}
if (user_ptr && !z_mem_trace_add(user_ptr, size, backt))
{
old_free(raw_ptr);
z_mem_trace_printf("Out of free memory blocks; backtrace='%s'\n",
z_mem_trace_format_bt(backt, buf, sizeof(buf)));
z_mem_trace_stats();
z_mem_trace_dump();
return NULL;
}
}
else
user_ptr = raw_ptr;
return user_ptr;
}
void
z_free(void *user_ptr, gpointer backt[])
{
gchar backtrace_buf[MEMTRACE_BACKTRACE_BUF_LEN];
gpointer raw_ptr;
gint size;
z_mem_trace_init_internal();
if (mem_trace)
{
size = z_mem_trace_getsize(user_ptr);
if (user_ptr && !z_mem_trace_del(user_ptr, backt))
{
z_mem_trace_printf("Trying to free a non-existing memory block; ptr=%p, backtrace='%s'\n",
user_ptr, z_mem_trace_format_bt(backt, backtrace_buf, sizeof(backtrace_buf)));
assert(0);
}
raw_ptr = z_mem_trace_check_canaries(user_ptr);
if (size != -1)
memset(user_ptr, MEMTRACE_CANARY_FILL, size);
}
else
{
raw_ptr = user_ptr;
}
if (!TMP_ALLOCATED(raw_ptr) && !mem_trace_hard)
old_free(raw_ptr);
}
void *
z_realloc(void *user_ptr, size_t size, gpointer backt[])
{
void *new_ptr, *raw_ptr = NULL;
size_t old_size = 0;
gchar buf[MEMTRACE_BACKTRACE_BUF_LEN];
z_mem_trace_init_internal();
if (mem_trace)
{
if (user_ptr)
{
old_size = z_mem_trace_getsize(user_ptr);
if (old_size == (size_t) -1 || !z_mem_trace_del(user_ptr, backt))
{
z_mem_trace_printf("Trying to realloc a non-existing memory block; ptr=%p, size='%d', info='%s'",
user_ptr, size, z_mem_trace_format_bt(backt, buf, sizeof(buf)));
assert(0);
}
raw_ptr = z_mem_trace_check_canaries(user_ptr);
}
}
else
{
raw_ptr = user_ptr;
}
if (old_realloc && old_malloc)
{
if (TMP_ALLOCATED(raw_ptr))
{
/* this ptr was allocated on the temp heap, move it to real heap */
z_mem_trace_printf("reallocing space on the temp heap, moving..., ptr=%p, temp_heap=%p, diff=%d, old_size=%d\n",
raw_ptr, temp_heap, (char *) raw_ptr-temp_heap, old_size);
new_ptr = old_malloc(size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD);
if (new_ptr)
{
new_ptr = z_mem_trace_fill_canaries(new_ptr, size);
/* copy user data */
memmove(new_ptr, user_ptr, old_size);
}
}
else
{
if (!mem_trace_hard)
{
new_ptr = old_realloc(raw_ptr, size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD);
/* fill_canaries doesn't touch data, only fills the canary info */
new_ptr = z_mem_trace_fill_canaries(new_ptr, size);
}
else
{
new_ptr = old_malloc(size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD);
/* fill_canaries doesn't touch data, only fills the canary info */
new_ptr = z_mem_trace_fill_canaries(new_ptr, size);
memmove(new_ptr, user_ptr, MIN(size, old_size));
if (old_size != (size_t) -1)
memset(user_ptr, MEMTRACE_CANARY_FILL, old_size);
}
}
}
else
{
new_ptr = &temp_heap[temp_brk];
temp_brk += size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD;
assert(temp_brk < MEMTRACE_TEMP_HEAP_SIZE);
new_ptr = z_mem_trace_fill_canaries(new_ptr, size);
/* copy user data */
memmove(new_ptr, user_ptr, old_size);
}
if (new_ptr)
{
z_mem_trace_add(new_ptr, size, backt);
}
return new_ptr;
}
void *
z_calloc(size_t nmemb, size_t size, gpointer backt[])
{
void *user_ptr, *raw_ptr;
z_mem_trace_init_internal();
if (old_calloc == NULL)
{
raw_ptr = &temp_heap[temp_brk];
temp_brk += nmemb * size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD;
assert(temp_brk < MEMTRACE_TEMP_HEAP_SIZE);
}
else
raw_ptr = old_calloc(nmemb, size + mem_trace_canaries * MEMTRACE_CANARY_OVERHEAD);
if (mem_trace)
{
user_ptr = z_mem_trace_fill_canaries(raw_ptr, nmemb * size);
z_mem_trace_add(user_ptr, nmemb * size, backt);
}
else
{
user_ptr = raw_ptr;
}
return user_ptr;
}
#undef malloc
#undef free
#undef realloc
#undef calloc
/* look up return address */
void *
malloc(size_t size)
{
gpointer backt[MEMTRACE_BACKTRACE_LEN];
if (mem_trace)
z_mem_trace_bt(backt);
else
backt[0] = 0;
return z_malloc(size, backt);
}
void
free(void *ptr)
{
gpointer backt[MEMTRACE_BACKTRACE_LEN];
if (mem_trace)
z_mem_trace_bt(backt);
else
backt[0] = 0;
return z_free(ptr, backt);
}
void *
realloc(void *ptr, size_t size)
{
gpointer backt[MEMTRACE_BACKTRACE_LEN];
if (mem_trace)
z_mem_trace_bt(backt);
else
backt[0] = 0;
return z_realloc(ptr, size, backt);
}
void *
calloc(size_t nmemb, size_t size)
{
gpointer backt[MEMTRACE_BACKTRACE_LEN];
if (mem_trace)
z_mem_trace_bt(backt);
else
backt[0] = 0;
return z_calloc(nmemb, size, backt);
}
#else
/**
* Save pointers to original free, realloc, calloc and malloc -- dummy version for when memtrace is disabled.
*
* @param memtrace_file unused
**/
void
z_mem_trace_init(gchar *memtrace_file G_GNUC_UNUSED)
{
}
/**
* Log statistics to the memtrace log -- dummy version for when memtrace is disabled.
**/
void
z_mem_trace_stats(void)
{
}
void
z_mem_trace_dump()
{
}
#endif
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