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libxml2/xmlmemory.c
Nick Wellnhofer 886bf4e63b Stop calling xmlMemoryDump 
This was used to check for memory leaks but could potentially create a
.memdump file. These days, there are better ways to check for memory
leaks.
2023-04-30 15:48:41 +02:00

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/*
* xmlmemory.c: libxml memory allocator wrapper.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
/* #define DEBUG_MEMORY */
/**
* MEM_LIST:
*
* keep track of all allocated blocks for error reporting
* Always build the memory list !
*/
#ifdef DEBUG_MEMORY_LOCATION
#ifndef MEM_LIST
#define MEM_LIST /* keep a list of all the allocated memory blocks */
#endif
#endif
#include <libxml/globals.h> /* must come before xmlmemory.h */
#include <libxml/xmlmemory.h>
#include <libxml/xmlerror.h>
#include <libxml/threads.h>
#include "private/memory.h"
#include "private/threads.h"
static unsigned long debugMemSize = 0;
static unsigned long debugMemBlocks = 0;
static unsigned long debugMaxMemSize = 0;
static xmlMutex xmlMemMutex;
void xmlMallocBreakpoint(void);
/************************************************************************
* *
* Macros, variables and associated types *
* *
************************************************************************/
#if !defined(LIBXML_THREAD_ENABLED) && !defined(LIBXML_THREAD_ALLOC_ENABLED)
#ifdef xmlMalloc
#undef xmlMalloc
#endif
#ifdef xmlRealloc
#undef xmlRealloc
#endif
#ifdef xmlMemStrdup
#undef xmlMemStrdup
#endif
#endif
/*
* Each of the blocks allocated begin with a header containing information
*/
#define MEMTAG 0x5aa5U
#define MALLOC_TYPE 1
#define REALLOC_TYPE 2
#define STRDUP_TYPE 3
#define MALLOC_ATOMIC_TYPE 4
#define REALLOC_ATOMIC_TYPE 5
typedef struct memnod {
unsigned int mh_tag;
unsigned int mh_type;
unsigned long mh_number;
size_t mh_size;
#ifdef MEM_LIST
struct memnod *mh_next;
struct memnod *mh_prev;
#endif
const char *mh_file;
unsigned int mh_line;
} MEMHDR;
#ifdef SUN4
#define ALIGN_SIZE 16
#else
#define ALIGN_SIZE sizeof(double)
#endif
#define HDR_SIZE sizeof(MEMHDR)
#define RESERVE_SIZE (((HDR_SIZE + (ALIGN_SIZE-1)) \
/ ALIGN_SIZE ) * ALIGN_SIZE)
#define MAX_SIZE_T ((size_t)-1)
#define CLIENT_2_HDR(a) ((void *) (((char *) (a)) - RESERVE_SIZE))
#define HDR_2_CLIENT(a) ((void *) (((char *) (a)) + RESERVE_SIZE))
static unsigned int block=0;
static unsigned int xmlMemStopAtBlock = 0;
static void *xmlMemTraceBlockAt = NULL;
#ifdef MEM_LIST
static MEMHDR *memlist = NULL;
#endif
static void debugmem_tag_error(void *addr);
#ifdef MEM_LIST
static void debugmem_list_add(MEMHDR *);
static void debugmem_list_delete(MEMHDR *);
#endif
#define Mem_Tag_Err(a) debugmem_tag_error(a);
#ifndef TEST_POINT
#define TEST_POINT
#endif
/**
* xmlMallocBreakpoint:
*
* Breakpoint to use in conjunction with xmlMemStopAtBlock. When the block
* number reaches the specified value this function is called. One need to add a breakpoint
* to it to get the context in which the given block is allocated.
*/
void
xmlMallocBreakpoint(void) {
xmlGenericError(xmlGenericErrorContext,
"xmlMallocBreakpoint reached on block %d\n", xmlMemStopAtBlock);
}
/**
* xmlMallocLoc:
* @size: an int specifying the size in byte to allocate.
* @file: the file name or NULL
* @line: the line number
*
* a malloc() equivalent, with logging of the allocation info.
*
* Returns a pointer to the allocated area or NULL in case of lack of memory.
*/
void *
xmlMallocLoc(size_t size, const char * file, int line)
{
MEMHDR *p;
void *ret;
xmlInitParser();
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Malloc(%d)\n",size);
#endif
TEST_POINT
if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
xmlGenericError(xmlGenericErrorContext,
"xmlMallocLoc : Unsigned overflow\n");
return(NULL);
}
p = (MEMHDR *) malloc(RESERVE_SIZE+size);
if (!p) {
xmlGenericError(xmlGenericErrorContext,
"xmlMallocLoc : Out of free space\n");
return(NULL);
}
p->mh_tag = MEMTAG;
p->mh_size = size;
p->mh_type = MALLOC_TYPE;
p->mh_file = file;
p->mh_line = line;
xmlMutexLock(&xmlMemMutex);
p->mh_number = ++block;
debugMemSize += size;
debugMemBlocks++;
if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
debugmem_list_add(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Malloc(%d) Ok\n",size);
#endif
if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
ret = HDR_2_CLIENT(p);
if (xmlMemTraceBlockAt == ret) {
xmlGenericError(xmlGenericErrorContext,
"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
(long unsigned)size);
xmlMallocBreakpoint();
}
TEST_POINT
return(ret);
}
/**
* xmlMallocAtomicLoc:
* @size: an unsigned int specifying the size in byte to allocate.
* @file: the file name or NULL
* @line: the line number
*
* a malloc() equivalent, with logging of the allocation info.
*
* Returns a pointer to the allocated area or NULL in case of lack of memory.
*/
void *
xmlMallocAtomicLoc(size_t size, const char * file, int line)
{
MEMHDR *p;
void *ret;
xmlInitParser();
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Malloc(%d)\n",size);
#endif
TEST_POINT
if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
xmlGenericError(xmlGenericErrorContext,
"xmlMallocAtomicLoc : Unsigned overflow\n");
return(NULL);
}
p = (MEMHDR *) malloc(RESERVE_SIZE+size);
if (!p) {
xmlGenericError(xmlGenericErrorContext,
"xmlMallocAtomicLoc : Out of free space\n");
return(NULL);
}
p->mh_tag = MEMTAG;
p->mh_size = size;
p->mh_type = MALLOC_ATOMIC_TYPE;
p->mh_file = file;
p->mh_line = line;
xmlMutexLock(&xmlMemMutex);
p->mh_number = ++block;
debugMemSize += size;
debugMemBlocks++;
if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
debugmem_list_add(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Malloc(%d) Ok\n",size);
#endif
if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
ret = HDR_2_CLIENT(p);
if (xmlMemTraceBlockAt == ret) {
xmlGenericError(xmlGenericErrorContext,
"%p : Malloc(%lu) Ok\n", xmlMemTraceBlockAt,
(long unsigned)size);
xmlMallocBreakpoint();
}
TEST_POINT
return(ret);
}
/**
* xmlMemMalloc:
* @size: an int specifying the size in byte to allocate.
*
* a malloc() equivalent, with logging of the allocation info.
*
* Returns a pointer to the allocated area or NULL in case of lack of memory.
*/
void *
xmlMemMalloc(size_t size)
{
return(xmlMallocLoc(size, "none", 0));
}
/**
* xmlReallocLoc:
* @ptr: the initial memory block pointer
* @size: an int specifying the size in byte to allocate.
* @file: the file name or NULL
* @line: the line number
*
* a realloc() equivalent, with logging of the allocation info.
*
* Returns a pointer to the allocated area or NULL in case of lack of memory.
*/
void *
xmlReallocLoc(void *ptr,size_t size, const char * file, int line)
{
MEMHDR *p, *tmp;
unsigned long number;
#ifdef DEBUG_MEMORY
size_t oldsize;
#endif
if (ptr == NULL)
return(xmlMallocLoc(size, file, line));
xmlInitParser();
TEST_POINT
p = CLIENT_2_HDR(ptr);
number = p->mh_number;
if (xmlMemStopAtBlock == number) xmlMallocBreakpoint();
if (p->mh_tag != MEMTAG) {
Mem_Tag_Err(p);
goto error;
}
p->mh_tag = ~MEMTAG;
xmlMutexLock(&xmlMemMutex);
debugMemSize -= p->mh_size;
debugMemBlocks--;
#ifdef DEBUG_MEMORY
oldsize = p->mh_size;
#endif
#ifdef MEM_LIST
debugmem_list_delete(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
xmlGenericError(xmlGenericErrorContext,
"xmlReallocLoc : Unsigned overflow\n");
return(NULL);
}
tmp = (MEMHDR *) realloc(p,RESERVE_SIZE+size);
if (!tmp) {
free(p);
goto error;
}
p = tmp;
if (xmlMemTraceBlockAt == ptr) {
xmlGenericError(xmlGenericErrorContext,
"%p : Realloced(%lu -> %lu) Ok\n",
xmlMemTraceBlockAt, (long unsigned)p->mh_size,
(long unsigned)size);
xmlMallocBreakpoint();
}
p->mh_tag = MEMTAG;
p->mh_number = number;
p->mh_type = REALLOC_TYPE;
p->mh_size = size;
p->mh_file = file;
p->mh_line = line;
xmlMutexLock(&xmlMemMutex);
debugMemSize += size;
debugMemBlocks++;
if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
debugmem_list_add(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
TEST_POINT
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Realloced(%d to %d) Ok\n", oldsize, size);
#endif
return(HDR_2_CLIENT(p));
error:
return(NULL);
}
/**
* xmlMemRealloc:
* @ptr: the initial memory block pointer
* @size: an int specifying the size in byte to allocate.
*
* a realloc() equivalent, with logging of the allocation info.
*
* Returns a pointer to the allocated area or NULL in case of lack of memory.
*/
void *
xmlMemRealloc(void *ptr,size_t size) {
return(xmlReallocLoc(ptr, size, "none", 0));
}
/**
* xmlMemFree:
* @ptr: the memory block pointer
*
* a free() equivalent, with error checking.
*/
void
xmlMemFree(void *ptr)
{
MEMHDR *p;
char *target;
#ifdef DEBUG_MEMORY
size_t size;
#endif
if (ptr == NULL)
return;
if (ptr == (void *) -1) {
xmlGenericError(xmlGenericErrorContext,
"trying to free pointer from freed area\n");
goto error;
}
if (xmlMemTraceBlockAt == ptr) {
xmlGenericError(xmlGenericErrorContext,
"%p : Freed()\n", xmlMemTraceBlockAt);
xmlMallocBreakpoint();
}
TEST_POINT
target = (char *) ptr;
p = CLIENT_2_HDR(ptr);
if (p->mh_tag != MEMTAG) {
Mem_Tag_Err(p);
goto error;
}
if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
p->mh_tag = ~MEMTAG;
memset(target, -1, p->mh_size);
xmlMutexLock(&xmlMemMutex);
debugMemSize -= p->mh_size;
debugMemBlocks--;
#ifdef DEBUG_MEMORY
size = p->mh_size;
#endif
#ifdef MEM_LIST
debugmem_list_delete(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
free(p);
TEST_POINT
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"Freed(%d) Ok\n", size);
#endif
return;
error:
xmlGenericError(xmlGenericErrorContext,
"xmlMemFree(%p) error\n", ptr);
xmlMallocBreakpoint();
return;
}
/**
* xmlMemStrdupLoc:
* @str: the initial string pointer
* @file: the file name or NULL
* @line: the line number
*
* a strdup() equivalent, with logging of the allocation info.
*
* Returns a pointer to the new string or NULL if allocation error occurred.
*/
char *
xmlMemStrdupLoc(const char *str, const char *file, int line)
{
char *s;
size_t size = strlen(str) + 1;
MEMHDR *p;
xmlInitParser();
TEST_POINT
if (size > (MAX_SIZE_T - RESERVE_SIZE)) {
xmlGenericError(xmlGenericErrorContext,
"xmlMemStrdupLoc : Unsigned overflow\n");
return(NULL);
}
p = (MEMHDR *) malloc(RESERVE_SIZE+size);
if (!p) {
goto error;
}
p->mh_tag = MEMTAG;
p->mh_size = size;
p->mh_type = STRDUP_TYPE;
p->mh_file = file;
p->mh_line = line;
xmlMutexLock(&xmlMemMutex);
p->mh_number = ++block;
debugMemSize += size;
debugMemBlocks++;
if (debugMemSize > debugMaxMemSize) debugMaxMemSize = debugMemSize;
#ifdef MEM_LIST
debugmem_list_add(p);
#endif
xmlMutexUnlock(&xmlMemMutex);
s = (char *) HDR_2_CLIENT(p);
if (xmlMemStopAtBlock == p->mh_number) xmlMallocBreakpoint();
strcpy(s,str);
TEST_POINT
if (xmlMemTraceBlockAt == s) {
xmlGenericError(xmlGenericErrorContext,
"%p : Strdup() Ok\n", xmlMemTraceBlockAt);
xmlMallocBreakpoint();
}
return(s);
error:
return(NULL);
}
/**
* xmlMemoryStrdup:
* @str: the initial string pointer
*
* a strdup() equivalent, with logging of the allocation info.
*
* Returns a pointer to the new string or NULL if allocation error occurred.
*/
char *
xmlMemoryStrdup(const char *str) {
return(xmlMemStrdupLoc(str, "none", 0));
}
/**
* xmlMemSize:
* @ptr: pointer to the memory allocation
*
* Returns the size of a memory allocation.
*/
size_t
xmlMemSize(void *ptr) {
MEMHDR *p;
if (ptr == NULL)
return(0);
p = CLIENT_2_HDR(ptr);
if (p->mh_tag != MEMTAG)
return(0);
return(p->mh_size);
}
/**
* xmlMemUsed:
*
* Provides the amount of memory currently allocated
*
* Returns an int representing the amount of memory allocated.
*/
int
xmlMemUsed(void) {
return(debugMemSize);
}
/**
* xmlMemBlocks:
*
* Provides the number of memory areas currently allocated
*
* Returns an int representing the number of blocks
*/
int
xmlMemBlocks(void) {
int res;
xmlMutexLock(&xmlMemMutex);
res = debugMemBlocks;
xmlMutexUnlock(&xmlMemMutex);
return(res);
}
/**
* xmlMemDisplayLast:
* @fp: a FILE descriptor used as the output file, if NULL, the result is
* written to the file .memorylist
* @nbBytes: the amount of memory to dump
*
* the last nbBytes of memory allocated and not freed, useful for dumping
* the memory left allocated between two places at runtime.
*/
void
xmlMemDisplayLast(FILE *fp, long nbBytes)
{
#ifdef MEM_LIST
MEMHDR *p;
unsigned idx;
int nb = 0;
#endif
FILE *old_fp = fp;
if (nbBytes <= 0)
return;
if (fp == NULL) {
fp = fopen(".memorylist", "w");
if (fp == NULL)
return;
}
#ifdef MEM_LIST
fprintf(fp," Last %li MEMORY ALLOCATED : %lu, MAX was %lu\n",
nbBytes, debugMemSize, debugMaxMemSize);
fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
idx = 0;
xmlMutexLock(&xmlMemMutex);
p = memlist;
while ((p) && (nbBytes > 0)) {
fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
(unsigned long)p->mh_size);
switch (p->mh_type) {
case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
default:
fprintf(fp,"Unknown memory block, may be corrupted");
xmlMutexUnlock(&xmlMemMutex);
if (old_fp == NULL)
fclose(fp);
return;
}
if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
if (p->mh_tag != MEMTAG)
fprintf(fp," INVALID");
nb++;
fprintf(fp,"\n");
nbBytes -= (unsigned long)p->mh_size;
p = p->mh_next;
}
xmlMutexUnlock(&xmlMemMutex);
#else
fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
#endif
if (old_fp == NULL)
fclose(fp);
}
/**
* xmlMemDisplay:
* @fp: a FILE descriptor used as the output file, if NULL, the result is
* written to the file .memorylist
*
* show in-extenso the memory blocks allocated
*/
void
xmlMemDisplay(FILE *fp)
{
#ifdef MEM_LIST
MEMHDR *p;
unsigned idx;
int nb = 0;
time_t currentTime;
char buf[500];
struct tm * tstruct;
#endif
FILE *old_fp = fp;
if (fp == NULL) {
fp = fopen(".memorylist", "w");
if (fp == NULL)
return;
}
#ifdef MEM_LIST
currentTime = time(NULL);
tstruct = localtime(&currentTime);
strftime(buf, sizeof(buf) - 1, "%I:%M:%S %p", tstruct);
fprintf(fp," %s\n\n", buf);
fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
debugMemSize, debugMaxMemSize);
fprintf(fp,"BLOCK NUMBER SIZE TYPE\n");
idx = 0;
xmlMutexLock(&xmlMemMutex);
p = memlist;
while (p) {
fprintf(fp,"%-5u %6lu %6lu ",idx++,p->mh_number,
(unsigned long)p->mh_size);
switch (p->mh_type) {
case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
default:
fprintf(fp,"Unknown memory block, may be corrupted");
xmlMutexUnlock(&xmlMemMutex);
if (old_fp == NULL)
fclose(fp);
return;
}
if (p->mh_file != NULL) fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
if (p->mh_tag != MEMTAG)
fprintf(fp," INVALID");
nb++;
fprintf(fp,"\n");
p = p->mh_next;
}
xmlMutexUnlock(&xmlMemMutex);
#else
fprintf(fp,"Memory list not compiled (MEM_LIST not defined !)\n");
#endif
if (old_fp == NULL)
fclose(fp);
}
#ifdef MEM_LIST
static void debugmem_list_add(MEMHDR *p)
{
p->mh_next = memlist;
p->mh_prev = NULL;
if (memlist) memlist->mh_prev = p;
memlist = p;
#ifdef MEM_LIST_DEBUG
if (stderr)
Mem_Display(stderr);
#endif
}
static void debugmem_list_delete(MEMHDR *p)
{
if (p->mh_next)
p->mh_next->mh_prev = p->mh_prev;
if (p->mh_prev)
p->mh_prev->mh_next = p->mh_next;
else memlist = p->mh_next;
#ifdef MEM_LIST_DEBUG
if (stderr)
Mem_Display(stderr);
#endif
}
#endif
/*
* debugmem_tag_error:
*
* internal error function.
*/
static void debugmem_tag_error(void *p)
{
xmlGenericError(xmlGenericErrorContext,
"Memory tag error occurs :%p \n\t bye\n", p);
#ifdef MEM_LIST
if (stderr)
xmlMemDisplay(stderr);
#endif
}
#ifdef MEM_LIST
static FILE *xmlMemoryDumpFile = NULL;
#endif
/**
* xmlMemShow:
* @fp: a FILE descriptor used as the output file
* @nr: number of entries to dump
*
* show a show display of the memory allocated, and dump
* the @nr last allocated areas which were not freed
*/
void
xmlMemShow(FILE *fp, int nr ATTRIBUTE_UNUSED)
{
#ifdef MEM_LIST
MEMHDR *p;
#endif
if (fp != NULL)
fprintf(fp," MEMORY ALLOCATED : %lu, MAX was %lu\n",
debugMemSize, debugMaxMemSize);
#ifdef MEM_LIST
xmlMutexLock(&xmlMemMutex);
if (nr > 0) {
fprintf(fp,"NUMBER SIZE TYPE WHERE\n");
p = memlist;
while ((p) && nr > 0) {
fprintf(fp,"%6lu %6lu ",p->mh_number,(unsigned long)p->mh_size);
switch (p->mh_type) {
case STRDUP_TYPE:fprintf(fp,"strdup() in ");break;
case MALLOC_TYPE:fprintf(fp,"malloc() in ");break;
case MALLOC_ATOMIC_TYPE:fprintf(fp,"atomicmalloc() in ");break;
case REALLOC_TYPE:fprintf(fp,"realloc() in ");break;
case REALLOC_ATOMIC_TYPE:fprintf(fp,"atomicrealloc() in ");break;
default:fprintf(fp," ??? in ");break;
}
if (p->mh_file != NULL)
fprintf(fp,"%s(%u)", p->mh_file, p->mh_line);
if (p->mh_tag != MEMTAG)
fprintf(fp," INVALID");
fprintf(fp,"\n");
nr--;
p = p->mh_next;
}
}
xmlMutexUnlock(&xmlMemMutex);
#endif /* MEM_LIST */
}
/**
* xmlMemoryDump:
*
* Dump in-extenso the memory blocks allocated to the file .memorylist
*/
void
xmlMemoryDump(void)
{
#ifdef MEM_LIST
FILE *dump;
if (debugMaxMemSize == 0)
return;
dump = fopen(".memdump", "w");
if (dump == NULL)
xmlMemoryDumpFile = stderr;
else xmlMemoryDumpFile = dump;
xmlMemDisplay(xmlMemoryDumpFile);
if (dump != NULL) fclose(dump);
#endif /* MEM_LIST */
}
/****************************************************************
* *
* Initialization Routines *
* *
****************************************************************/
/**
* xmlInitMemory:
*
* DEPRECATED: Alias for xmlInitParser.
*/
int
xmlInitMemory(void) {
xmlInitParser();
return(0);
}
/**
* xmlInitMemoryInternal:
*
* Initialize the memory layer.
*
* Returns 0 on success
*/
void
xmlInitMemoryInternal(void) {
char *breakpoint;
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlInitMemory()\n");
#endif
xmlInitMutex(&xmlMemMutex);
breakpoint = getenv("XML_MEM_BREAKPOINT");
if (breakpoint != NULL) {
sscanf(breakpoint, "%ud", &xmlMemStopAtBlock);
}
breakpoint = getenv("XML_MEM_TRACE");
if (breakpoint != NULL) {
sscanf(breakpoint, "%p", &xmlMemTraceBlockAt);
}
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlInitMemory() Ok\n");
#endif
}
/**
* xmlCleanupMemory:
*
* DEPRECATED: This function is a no-op. Call xmlCleanupParser
* to free global state but see the warnings there. xmlCleanupParser
* should be only called once at program exit. In most cases, you don't
* have call cleanup functions at all.
*/
void
xmlCleanupMemory(void) {
}
/**
* xmlCleanupMemoryInternal:
*
* Free up all the memory allocated by the library for its own
* use. This should not be called by user level code.
*/
void
xmlCleanupMemoryInternal(void) {
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlCleanupMemory()\n");
#endif
xmlCleanupMutex(&xmlMemMutex);
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlCleanupMemory() Ok\n");
#endif
}
/**
* xmlMemSetup:
* @freeFunc: the free() function to use
* @mallocFunc: the malloc() function to use
* @reallocFunc: the realloc() function to use
* @strdupFunc: the strdup() function to use
*
* Override the default memory access functions with a new set
* This has to be called before any other libxml routines !
*
* Should this be blocked if there was already some allocations
* done ?
*
* Returns 0 on success
*/
int
xmlMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
xmlReallocFunc reallocFunc, xmlStrdupFunc strdupFunc) {
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlMemSetup()\n");
#endif
if (freeFunc == NULL)
return(-1);
if (mallocFunc == NULL)
return(-1);
if (reallocFunc == NULL)
return(-1);
if (strdupFunc == NULL)
return(-1);
xmlFree = freeFunc;
xmlMalloc = mallocFunc;
xmlMallocAtomic = mallocFunc;
xmlRealloc = reallocFunc;
xmlMemStrdup = strdupFunc;
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlMemSetup() Ok\n");
#endif
return(0);
}
/**
* xmlMemGet:
* @freeFunc: place to save the free() function in use
* @mallocFunc: place to save the malloc() function in use
* @reallocFunc: place to save the realloc() function in use
* @strdupFunc: place to save the strdup() function in use
*
* Provides the memory access functions set currently in use
*
* Returns 0 on success
*/
int
xmlMemGet(xmlFreeFunc *freeFunc, xmlMallocFunc *mallocFunc,
xmlReallocFunc *reallocFunc, xmlStrdupFunc *strdupFunc) {
if (freeFunc != NULL) *freeFunc = xmlFree;
if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
return(0);
}
/**
* xmlGcMemSetup:
* @freeFunc: the free() function to use
* @mallocFunc: the malloc() function to use
* @mallocAtomicFunc: the malloc() function to use for atomic allocations
* @reallocFunc: the realloc() function to use
* @strdupFunc: the strdup() function to use
*
* Override the default memory access functions with a new set
* This has to be called before any other libxml routines !
* The mallocAtomicFunc is specialized for atomic block
* allocations (i.e. of areas useful for garbage collected memory allocators
*
* Should this be blocked if there was already some allocations
* done ?
*
* Returns 0 on success
*/
int
xmlGcMemSetup(xmlFreeFunc freeFunc, xmlMallocFunc mallocFunc,
xmlMallocFunc mallocAtomicFunc, xmlReallocFunc reallocFunc,
xmlStrdupFunc strdupFunc) {
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlGcMemSetup()\n");
#endif
if (freeFunc == NULL)
return(-1);
if (mallocFunc == NULL)
return(-1);
if (mallocAtomicFunc == NULL)
return(-1);
if (reallocFunc == NULL)
return(-1);
if (strdupFunc == NULL)
return(-1);
xmlFree = freeFunc;
xmlMalloc = mallocFunc;
xmlMallocAtomic = mallocAtomicFunc;
xmlRealloc = reallocFunc;
xmlMemStrdup = strdupFunc;
#ifdef DEBUG_MEMORY
xmlGenericError(xmlGenericErrorContext,
"xmlGcMemSetup() Ok\n");
#endif
return(0);
}
/**
* xmlGcMemGet:
* @freeFunc: place to save the free() function in use
* @mallocFunc: place to save the malloc() function in use
* @mallocAtomicFunc: place to save the atomic malloc() function in use
* @reallocFunc: place to save the realloc() function in use
* @strdupFunc: place to save the strdup() function in use
*
* Provides the memory access functions set currently in use
* The mallocAtomicFunc is specialized for atomic block
* allocations (i.e. of areas useful for garbage collected memory allocators
*
* Returns 0 on success
*/
int
xmlGcMemGet(xmlFreeFunc *freeFunc, xmlMallocFunc *mallocFunc,
xmlMallocFunc *mallocAtomicFunc, xmlReallocFunc *reallocFunc,
xmlStrdupFunc *strdupFunc) {
if (freeFunc != NULL) *freeFunc = xmlFree;
if (mallocFunc != NULL) *mallocFunc = xmlMalloc;
if (mallocAtomicFunc != NULL) *mallocAtomicFunc = xmlMallocAtomic;
if (reallocFunc != NULL) *reallocFunc = xmlRealloc;
if (strdupFunc != NULL) *strdupFunc = xmlMemStrdup;
return(0);
}
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