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deb-goldedplus/goldlib/gall/gmemdbg.cpp

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2000-02-25 10:15:17 +00:00
// This may look like C code, but it is really -*- C++ -*-
// ------------------------------------------------------------------
// The Goldware Library
// Copyright (C) 1990-1999 Odinn Sorensen
// Copyright (C) 2000 Alexander S. Aganichev
// ------------------------------------------------------------------
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this program; if not, write to the Free
// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307, USA
// ------------------------------------------------------------------
// $Id$
// ------------------------------------------------------------------
// Memory management routines with debugging features.
// Based on free code from SNIPPETS 9404 by Walter Bright.
// ------------------------------------------------------------------
#include <climits>
#include <gdbgerr.h>
#include <gmemdbg.h>
#include <glog.h>
#include <gmemall.h>
// ------------------------------------------------------------------
// Global vars
int throw_alloc_extra = 0;
#if defined(GTHROW_LOG)
glog* throw_log = NULL;
#define TLOG if(throw_log) throw_log
#endif
// ------------------------------------------------------------------
#define gmem_strdup strdup
#define gmem_malloc malloc
#define gmem_calloc calloc
#define gmem_realloc realloc
#define gmem_free free
// ------------------------------------------------------------------
#if defined(GTHROW_DEBUG)
// ------------------------------------------------------------------
// Various values
const dword BEFOREVAL = 0x12345678L;
const dword AFTERVAL = 0x87654321L;
const byte BADVAL = 0xFF;
const byte MALLOCVAL = 0xEE;
const size_t BAD_SIZE = 0xFFFFFFFF;
const size_t MALLOC_SIZE = 0xEEEEEEEE;
// ------------------------------------------------------------------
// Struct
#if defined(GOLD_CANPACK)
#pragma pack(1)
#endif
struct Throw {
Throw* next;
Throw* prev;
const char* file;
int line;
int index;
size_t nbytes;
dword beforeval;
char data[1];
};
#if defined(GOLD_CANPACK)
#pragma pack()
#endif
// ------------------------------------------------------------------
struct ThrowIndex {
Throw* pointer;
};
// ------------------------------------------------------------------
// Internal vars
int throw_inited = 0;
int throw_count;
ulong throw_allocations = 0;
Throw throw_alloclist;
int throw_max_count = 0;
Throw** throw_index = NULL;
int throw_index_size = 0;
int throw_index_free = 0;
int throw_last_free = -1;
ulong throw_index_cache_hits = 0;
int throw_overhead = sizeof(Throw) - 1;
#define throw_index_init_size 1000
#define throw_index_increment 100
// ------------------------------------------------------------------
// Inlined functions
inline Throw* throw_ptrtodl(const void* ptr) { return (Throw*)((const char*)ptr-sizeof(Throw)+1); }
inline void* throw_dltoptr(Throw* dl) { return (void*)dl->data; }
// ------------------------------------------------------------------
int throw_index_find_free() {
if(throw_last_free != -1) {
throw_index_cache_hits++;
return throw_last_free;
}
else if(throw_index_free) {
Throw** i = throw_index;
for(int n=0; n<throw_index_size; n++,i++) {
if(*i == NULL) {
throw_last_free = n;
return throw_last_free;
}
}
}
if(throw_index_size) {
throw_index = (Throw**)realloc(throw_index, (throw_index_size+throw_index_increment)*sizeof(Throw*));
throw_new(throw_index);
memset(throw_index+throw_index_size, 0, throw_index_increment*sizeof(Throw*));
throw_last_free = throw_index_size;
throw_index_size += throw_index_increment;
throw_index_free = throw_index_increment;
}
else {
throw_index = (Throw**)calloc(throw_index_init_size, sizeof(Throw*));
throw_new(throw_index);
throw_index_size = throw_index_init_size;
throw_index_free = throw_index_init_size;
throw_last_free = 0;
}
return throw_last_free;
}
// ------------------------------------------------------------------
int throw_index_add(Throw* pointer) {
int index = throw_index_find_free();
throw_index[index] = pointer;
throw_last_free = -1;
throw_index_free--;
return index;
}
// ------------------------------------------------------------------
void throw_index_remove(int index) {
throw_index[index] = NULL;
throw_last_free = index;
throw_index_free++;
}
// ------------------------------------------------------------------
Throw* throw_find_overrun(Throw* pointer) {
Throw* last_candidate = NULL;
long last_diff = LONG_MAX;
Throw** i = throw_index;
for(int n=0; n<throw_index_size; n++,i++) {
long diff = (ulong)*i - (ulong)pointer;
if((diff > 0) and (diff < last_diff)) {
last_candidate = *i;
last_diff = diff;
}
}
return last_candidate;
}
// ------------------------------------------------------------------
Throw* throw_find_underrun(Throw* pointer) {
Throw* last_candidate = NULL;
long last_diff = LONG_MAX;
Throw** i = throw_index;
for(int n=0; n<throw_index_size; n++,i++) {
long diff = (ulong)pointer - (ulong)*i;
if((diff > 0) and (diff < last_diff)) {
last_candidate = *i;
last_diff = diff;
}
}
return last_candidate;
}
// ------------------------------------------------------------------
// Dump pointer information to the log
#if defined(GTHROW_LOG)
void throw_printdl(Throw* dl) {
char buf[100];
char* ptr = (char*)throw_dltoptr(dl);
TLOG->printf(": Ptr (%p,%u) at [%s,%u].", ptr, dl->nbytes, CleanFilename(dl->file), (uint)dl->line);
TLOG->printf(": %s", HexDump16(buf, ptr, dl->nbytes, HEX_DUMP2));
}
#else
inline void throw_printdl(Throw* dl) {}
#endif
// ------------------------------------------------------------------
// Debugging new
void throw_new_debug(const void* __ptr, const char* __file, int __line) {
if(__ptr == NULL) {
#if defined(GTHROW_LOG)
TLOG->errmemory(__file, __line);
TLOG->printf("! A memory allocation failed (out of memory).");
TLOG->printf("+ Advice: Restart.");
#endif
MemoryErrorExit();
}
}
// ------------------------------------------------------------------
// Debugging strdup()
char* throw_strdup_debug(const char* __str, const char* __file, int __line) {
char* _ptr = (char*)(__str ? throw_calloc_debug(1, strlen(__str)+1, __file, __line) : NULL);
return _ptr ? strcpy(_ptr, __str) : _ptr;
}
// ------------------------------------------------------------------
// Debugging malloc()
void* throw_malloc_debug(size_t __size, const char* __file, int __line) {
void* _ptr = throw_calloc_debug(1, __size, __file, __line);
if(_ptr)
memset(_ptr, MALLOCVAL, __size);
return _ptr;
}
// ------------------------------------------------------------------
// Debugging calloc()
void* throw_calloc_debug(size_t __items, size_t __size, const char* __file, int __line) {
__size *= __items;
__size += throw_alloc_extra;
if(__size == 0) {
#if defined(GTHROW_LOG)
TLOG->errmemory(__file, __line);
TLOG->printf("! Attempted to allocate zero bytes of memory.");
TLOG->printf("+ Advice: This is a bug. Please report to the Author.");
#endif
MemoryErrorExit();
}
size_t _siz = sizeof(Throw) + __size + sizeof(AFTERVAL) - 1;
Throw* dl = (Throw*)calloc(_siz, 1);
if(dl == NULL) {
#if defined(GTHROW_LOG)
TLOG->errmemory(__file, __line);
TLOG->printf("! A memory allocation failed (out of memory).");
TLOG->printf(": Needed %u (%Xh) bytes.", (uint)__size, (uint)__size);
if(__size == BAD_SIZE) {
TLOG->printf("+ Info: Value could be from free'd data.");
TLOG->printf("+ Info: This indicates a serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
}
else if(__size == MALLOC_SIZE) {
TLOG->printf("+ Info: Value could be from uninitialized data");
TLOG->printf("+ Info: This indicates a serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
}
else {
TLOG->printf("+ Advice: Restart.");
}
#endif
MemoryErrorExit();
}
dl->index = throw_index_add(dl);
dl->file = __file;
dl->line = __line;
dl->nbytes = __size;
dl->beforeval = BEFOREVAL;
*(dword*)&(dl->data[__size]) = AFTERVAL;
dl->next = throw_alloclist.next;
dl->prev = &throw_alloclist;
throw_alloclist.next = dl;
if(dl->next != NULL)
dl->next->prev = dl;
throw_count++;
throw_max_count = maximum_of_two(throw_count, throw_max_count);
throw_allocations++;
return throw_dltoptr(dl);
}
// ------------------------------------------------------------------
// Debugging realloc()
void* throw_realloc_debug(void* __oldptr, size_t __size, const char* __file, int __line) {
void* _ptr;
Throw* dl = throw_ptrtodl(__oldptr);
if(__size == 0) {
throw_free_debug(__oldptr,__file,__line);
_ptr = NULL;
}
else if(__oldptr == NULL) {
_ptr = throw_malloc_debug(__size,__file,__line);
}
else {
_ptr = throw_malloc_debug(__size,__file,__line);
if(dl->nbytes < __size)
__size = dl->nbytes;
memcpy(_ptr,__oldptr,__size);
throw_free_debug(__oldptr,__file,__line);
}
return _ptr;
}
// ------------------------------------------------------------------
// Debugging free()
void throw_free_debug(void* __ptr, const char* __file, int __line) {
Throw* dl;
Throw* overrun_dl = NULL;
Throw* underrun_dl = NULL;
if(__ptr == NULL)
return;
int inerr = false;
if(throw_count <= 0) {
#if defined(GTHROW_LOG)
TLOG->errmemory(__file, __line);
TLOG->printf("! More free's than allocs.");
TLOG->printf("+ Info: This indicates a potentially serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
#endif
goto err;
}
dl = throw_ptrtodl(__ptr);
if(dl->nbytes == BAD_SIZE) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! A memory allocation was already free'd.");
#endif
goto err2;
}
if(dl->beforeval != BEFOREVAL) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! An allocated memory region was underrun.");
#endif
dl->prev = dl->next = NULL;
dl->file = NULL;
underrun_dl = throw_find_underrun(dl);
goto err2;
}
if(*(dword*)&dl->data[dl->nbytes] != AFTERVAL) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! An allocated memory region was overrun.");
#endif
overrun_dl = throw_find_overrun(dl);
inerr = true;
}
if(inerr)
goto err2;
if(dl->prev)
dl->prev->next = dl->next;
if(dl->next)
dl->next->prev = dl->prev;
throw_index_remove(dl->index);
memset(dl,BADVAL,sizeof(*dl)+dl->nbytes);
throw_count--;
free(dl);
return;
err2:
throw_printdl(dl);
if(underrun_dl) {
#if defined(GTHROW_LOG)
TLOG->printf("! Possibly caused by overrun in this allocation:");
throw_printdl(underrun_dl);
if(*(dword*)&underrun_dl->data[underrun_dl->nbytes] != AFTERVAL)
TLOG->printf("! Overrun of previous allocation confirmed.");
#endif
}
if(overrun_dl) {
#if defined(GTHROW_LOG)
TLOG->printf("! Possibly cause - Underrun in this allocation:");
throw_printdl(overrun_dl);
if(overrun_dl->beforeval != BEFOREVAL)
TLOG->printf("! Underrun of previous allocation confirmed.");
#endif
}
#if defined(GTHROW_LOG)
TLOG->printf(": Detected while freeing the allocation.");
TLOG->printf("+ Info: This indicates a serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
#endif
err:
//PointerErrorExit();
;
}
// ------------------------------------------------------------------
// Check all allocations
void throw_check_debug(const char* __file, int __line) {
Throw* dl = throw_alloclist.next;
while(dl != NULL) {
throw_checkptr_debug(throw_dltoptr(dl), __file, __line);
dl = dl->next;
}
}
// ------------------------------------------------------------------
// Check individual allocation
void throw_checkptr_debug(const void* __ptr, const char* __file, int __line) {
int inerr = false;
Throw* dl;
Throw* overrun_dl = NULL;
Throw* underrun_dl = NULL;
if(__ptr == NULL) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! Found NULL pointer instead of allocated memory.");
#endif
goto err3;
}
dl = throw_ptrtodl(__ptr);
if(dl->beforeval != BEFOREVAL) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! An allocated memory region was underrun.");
#endif
dl->prev = dl->next = NULL;
dl->file = NULL;
underrun_dl = throw_find_underrun(dl);
goto err2;
}
if(*(dword*)&dl->data[dl->nbytes] != AFTERVAL) {
#if defined(GTHROW_LOG)
TLOG->errpointer(__file, __line);
TLOG->printf("! An allocated memory region was overrun.");
#endif
overrun_dl = throw_find_overrun(dl);
inerr = true;
}
if(inerr)
goto err2;
return;
err2:
throw_printdl(dl);
if(underrun_dl) {
#if defined(GTHROW_LOG)
TLOG->printf("! Possibly caused by overrun in this allocation:");
throw_printdl(underrun_dl);
if(*(dword*)&underrun_dl->data[underrun_dl->nbytes] != AFTERVAL)
TLOG->printf("! Overrun of previous allocation confirmed.");
#endif
}
if(overrun_dl) {
#if defined(GTHROW_LOG)
TLOG->printf("! Possibly cause - Underrun in this allocation:");
throw_printdl(overrun_dl);
if(overrun_dl->beforeval != BEFOREVAL)
TLOG->printf("! Underrun of previous allocation confirmed.");
#endif
}
err3:
#if defined(GTHROW_LOG)
TLOG->printf(": Detected while checking the allocation.");
TLOG->printf("+ Info: This indicates a serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
#endif
PointerErrorExit();
}
// ------------------------------------------------------------------
// Termination function
static void throw_term(void) {
if(throw_inited) {
#if defined(GTHROW_LOG)
if(throw_count)
TLOG->printf("! Detected %i unfree'd memory allocation%s.", throw_count, throw_count==1?"":"s");
if(not error_exit) {
Throw* dl = throw_alloclist.next;
int count = throw_count;
for(; dl; ) {
Throw* dl_next = dl->next;
throw_printdl(dl);
throw_free_debug(throw_dltoptr(dl), __FILE__, __LINE__);
dl = dl_next;
}
throw_count = count;
if(throw_count) {
TLOG->printf("+ Info: The memory should have been free'd before exit.");
TLOG->printf("+ Info: This indicates a potentially serious bug.");
TLOG->printf("+ Advice: Report to the Author immediately.");
}
}
#endif
free(throw_index);
throw_inited = 0;
}
}
// ------------------------------------------------------------------
// Init function
void throw_init() {
if(throw_inited == 0) {
throw_count = 0;
throw_alloclist.next = NULL;
throw_alloclist.prev = NULL;
throw_alloclist.file = __FILE__;
throw_alloclist.line = __LINE__;
throw_alloclist.nbytes = 0;
throw_alloclist.beforeval = BEFOREVAL;
throw_alloclist.data[0] = 0xFF;
throw_inited++;
atexit(throw_term);
}
}
// ------------------------------------------------------------------
#ifdef gmem_strdup
#undef gmem_strdup
#define gmem_strdup(a) throw_strdup_debug(a, file, line)
#undef gmem_malloc
#define gmem_malloc(a) throw_malloc_debug(a, file, line)
#undef gmem_calloc
#define gmem_calloc(a,b) throw_calloc_debug(a, b, file, line)
#undef gmem_realloc
#define gmem_realloc(a,b) throw_realloc_debug(a, b, file, line)
#undef gmem_free
#define gmem_free(a) throw_free_debug(a, file, line)
#endif
#endif
// ------------------------------------------------------------------
void* throw_outofmem_report(const char* file, int line, uint size) {
#if defined(GTHROW_LOG)
TLOG->errmemory(file, line);
if(size == 0) {
TLOG->printf("! Attempted to allocate zero bytes of memory.");
TLOG->printf("+ Advice: This is a bug. Please report to the Author.");
}
else {
TLOG->printf("! A memory allocation failed (out of memory).");
TLOG->printf(": Needed %u (%Xh) bytes.", size, size);
TLOG->printf("+ Advice: Restart.");
}
#else
NW(file);
NW(line);
NW(size);
#endif
MemoryErrorExit();
return NULL;
}
// ------------------------------------------------------------------
void throw_xnew_debug(void* ptr, const char* file, int line) {
if(ptr == NULL)
throw_outofmem_report(file, line, 0);
}
// ------------------------------------------------------------------
char* throw_xstrdup_debug(const char* str, const char* file, int line) {
char* s = gmem_strdup(str);
return s ? s : (char*)throw_outofmem_report(file, line, strlen(str));
}
// ------------------------------------------------------------------
void* throw_xmalloc_debug(size_t size, const char* file, int line) {
void* p = gmem_malloc(size+throw_alloc_extra);
return p ? p : throw_outofmem_report(file, line, size);
}
// ------------------------------------------------------------------
void* throw_xcalloc_debug(size_t items, size_t size, const char* file, int line) {
void* p = gmem_calloc(items, size+throw_alloc_extra);
return p ? p : throw_outofmem_report(file, line, items*size);
}
// ------------------------------------------------------------------
void* throw_xrealloc_debug(void* ptr, size_t size, const char* file, int line) {
void* p = gmem_realloc(ptr, size+throw_alloc_extra);
return p ? p : throw_outofmem_report(file, line, size);
}
// ------------------------------------------------------------------
void throw_xfree_debug(void* ptr, const char* file, int line) {
if(ptr)
gmem_free(ptr);
}
// ------------------------------------------------------------------