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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/*
* system.c: A grab bag of system-level abstractions
*
* Many authors
*/
#include "netsite.h"
#include "prlog.h"
#include "base/ereport.h"
#ifdef XP_WIN32
#include <windows.h>
static char *version = "Netscape Server/2.0";
#endif
#include "base/systems.h" /* find out if we have malloc pools */
static int thread_malloc_key = -1;
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
#include "base/pool.h"
#include "base/systhr.h"
#define MALLOC_KEY \
((pool_handle_t *)(thread_malloc_key != -1 ? systhread_getdata(thread_malloc_key) : NULL))
#endif
#ifdef MCC_DEBUG
#define DEBUG_MALLOC
#endif
#ifdef DEBUG_MALLOC
/* The debug malloc routines provide several functions:
*
* - detect allocated memory overflow/underflow
* - detect multiple frees
* - intentionally clobbers malloc'd buffers
* - intentionally clobbers freed buffers
*/
#define DEBUG_MAGIC 0x12345678
#define DEBUG_MARGIN 32
#define DEBUG_MARGIN_CHAR '*'
#define DEBUG_MALLOC_CHAR '.'
#define DEBUG_FREE_CHAR 'X'
#endif /* DEBUG_MALLOC */
/* On NT, the server version string is not statically encoded based
* upon a product compile define but dynamically set by the server
* exe at startup.
*/
NSAPI_PUBLIC char *system_version()
{
#ifdef XP_WIN32
return version;
#else /* XP_UNIX */
return MAGNUS_VERSION_STRING;
#endif /* XP_UNIX */
}
NSAPI_PUBLIC void system_version_set(char *server_version)
{
#ifdef XP_WIN32
version = PERM_STRDUP(server_version);
#endif
}
NSAPI_PUBLIC void *system_malloc(int size)
{
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
return pool_malloc(MALLOC_KEY, size);
#else
return malloc(size);
#endif
}
NSAPI_PUBLIC void *system_calloc(int size)
{
void *ret;
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
ret = pool_malloc(MALLOC_KEY, size);
#else
ret = malloc(size);
#endif
if(ret)
ZERO(ret, size);
return ret;
}
NSAPI_PUBLIC void *system_realloc(void *ptr, int size)
{
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
return pool_realloc(MALLOC_KEY, ptr, size);
#else
return realloc(ptr, size);
#endif
}
NSAPI_PUBLIC void system_free(void *ptr)
{
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
pool_free(MALLOC_KEY, ptr);
#else
PR_ASSERT(ptr);
free(ptr);
#endif
}
NSAPI_PUBLIC char *system_strdup(const char *ptr)
{
PR_ASSERT(ptr);
#if defined(MALLOC_POOLS) && defined(MCC_HTTPD) && defined(THREAD_ANY)
return pool_strdup(MALLOC_KEY, ptr);
#else
return strdup(ptr);
#endif
}
NSAPI_PUBLIC void *system_malloc_perm(int size)
{
#ifndef DEBUG_MALLOC
return malloc(size);
#else
char *ptr = (char *)malloc(size + 2*DEBUG_MARGIN+2*sizeof(int));
char *real_ptr;
int *magic;
int *length;
magic = (int *)ptr;
*magic = DEBUG_MAGIC;
ptr += sizeof(int);
length = (int *)ptr;
*length = size;
ptr += sizeof(int);
memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
ptr += DEBUG_MARGIN;
memset(ptr, DEBUG_MALLOC_CHAR, size);
real_ptr = ptr;
ptr += size;
memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
return real_ptr;
#endif
}
NSAPI_PUBLIC void *system_calloc_perm(int size)
{
void *ret = system_malloc_perm(size);
if(ret)
ZERO(ret, size);
return ret;
}
NSAPI_PUBLIC void *system_realloc_perm(void *ptr, int size)
{
#ifndef DEBUG_MALLOC
return realloc(ptr, size);
#else
int *magic, *length;
char *baseptr;
char *cptr;
cptr = (char *)ptr - DEBUG_MARGIN - 2 * sizeof(int);
magic = (int *)cptr;
if (*magic == DEBUG_MAGIC) {
cptr += sizeof(int);
length = (int *)cptr;
if (*length < size) {
char *newptr = (char *)system_malloc_perm(size);
memcpy(newptr, ptr, *length);
system_free_perm(ptr);
return newptr;
}else {
return ptr;
}
} else {
ereport(LOG_WARN, "realloc: attempt to realloc to smaller size");
return realloc(ptr, size);
}
#endif
}
NSAPI_PUBLIC void system_free_perm(void *ptr)
{
#ifdef DEBUG_MALLOC
int *length, *magic;
char *baseptr, *cptr;
int index;
PR_ASSERT(ptr);
cptr = baseptr = ((char *)ptr) - DEBUG_MARGIN - 2*sizeof(int);
magic = (int *)cptr;
if (*magic == DEBUG_MAGIC) {
cptr += sizeof(int);
length = (int *)cptr;
cptr += sizeof(int);
for (index=0; index<DEBUG_MARGIN; index++)
if (cptr[index] != DEBUG_MARGIN_CHAR) {
ereport(LOG_CATASTROPHE, "free: corrupt memory (prebounds overwrite)");
break;
}
cptr += DEBUG_MARGIN + *length;
for (index=0; index<DEBUG_MARGIN; index++)
if (cptr[index] != DEBUG_MARGIN_CHAR) {
ereport(LOG_CATASTROPHE, "free: corrupt memory (prebounds overwrite)");
break;
}
memset(baseptr, DEBUG_FREE_CHAR, *length + 2*DEBUG_MARGIN+sizeof(int));
} else {
ereport(LOG_CATASTROPHE, "free: freeing unallocated memory");
}
free(baseptr);
#else
free(ptr);
#endif
}
NSAPI_PUBLIC char *system_strdup_perm(const char *ptr)
{
#ifndef DEBUG_MALLOC
PR_ASSERT(ptr);
return strdup(ptr);
#else
int len = strlen(ptr);
char *nptr = (char *)system_malloc_perm(len+1);
memcpy(nptr, ptr, len);
nptr[len] = '\0';
return nptr;
#endif
}
NSAPI_PUBLIC int
getThreadMallocKey(void)
{
return thread_malloc_key;
}
void
setThreadMallocKey(int key)
{
thread_malloc_key = key;
}
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