696 lines
18 KiB
C++
696 lines
18 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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// ------------------------------------------------------------------
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// The Goldware Library
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// Copyright (C) 1990-1999 Odinn Sorensen
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// Copyright (C) 2000 Alexander S. Aganichev
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// ------------------------------------------------------------------
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this program; if not, write to the Free
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// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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// MA 02111-1307, USA
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// ------------------------------------------------------------------
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// $Id$
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// ------------------------------------------------------------------
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// Memory management routines with debugging features.
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// Based on free code from SNIPPETS 9404 by Walter Bright.
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// ------------------------------------------------------------------
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#include <climits>
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#include <gdbgerr.h>
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#include <gmemdbg.h>
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#include <glog.h>
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#include <gmemall.h>
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// ------------------------------------------------------------------
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// Global vars
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int throw_alloc_extra = 0;
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#if defined(GTHROW_LOG)
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glog* throw_log = NULL;
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#define TLOG if(throw_log) throw_log
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#endif
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// ------------------------------------------------------------------
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#define gmem_strdup strdup
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#define gmem_malloc malloc
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#define gmem_calloc calloc
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#define gmem_realloc realloc
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#define gmem_free free
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// ------------------------------------------------------------------
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#if defined(GTHROW_DEBUG)
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// ------------------------------------------------------------------
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// Various values
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const dword BEFOREVAL = 0x12345678L;
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const dword AFTERVAL = 0x87654321L;
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const byte BADVAL = 0xFF;
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const byte MALLOCVAL = 0xEE;
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const size_t BAD_SIZE = 0xFFFFFFFF;
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const size_t MALLOC_SIZE = 0xEEEEEEEE;
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// ------------------------------------------------------------------
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// Struct
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#if defined(GOLD_CANPACK)
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#pragma pack(1)
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#endif
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struct Throw {
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Throw* next;
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Throw* prev;
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const char* file;
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int line;
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int index;
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size_t nbytes;
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dword beforeval;
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char data[1];
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};
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#if defined(GOLD_CANPACK)
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#pragma pack()
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#endif
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// ------------------------------------------------------------------
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struct ThrowIndex {
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Throw* pointer;
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};
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// ------------------------------------------------------------------
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// Internal vars
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int throw_inited = 0;
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int throw_count;
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uint32_t throw_allocations = 0;
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Throw throw_alloclist;
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int throw_max_count = 0;
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Throw** throw_index = NULL;
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int throw_index_size = 0;
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int throw_index_free = 0;
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int throw_last_free = -1;
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uint32_t throw_index_cache_hits = 0;
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int throw_overhead = sizeof(Throw) - 1;
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#define throw_index_init_size 1000
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#define throw_index_increment 100
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// ------------------------------------------------------------------
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// Inlined functions
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inline Throw* throw_ptrtodl(const void* ptr) { return (Throw*)((const char*)ptr-sizeof(Throw)+1); }
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inline void* throw_dltoptr(Throw* dl) { return (void*)dl->data; }
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// ------------------------------------------------------------------
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int throw_index_find_free() {
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if(throw_last_free != -1) {
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throw_index_cache_hits++;
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return throw_last_free;
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}
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else if(throw_index_free) {
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Throw** i = throw_index;
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for(int n=0; n<throw_index_size; n++,i++) {
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if(*i == NULL) {
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throw_last_free = n;
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return throw_last_free;
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}
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}
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}
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if(throw_index_size) {
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throw_index = (Throw**)realloc(throw_index, (throw_index_size+throw_index_increment)*sizeof(Throw*));
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throw_new(throw_index);
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memset(throw_index+throw_index_size, 0, throw_index_increment*sizeof(Throw*));
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throw_last_free = throw_index_size;
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throw_index_size += throw_index_increment;
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throw_index_free = throw_index_increment;
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}
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else {
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throw_index = (Throw**)calloc(throw_index_init_size, sizeof(Throw*));
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throw_new(throw_index);
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throw_index_size = throw_index_init_size;
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throw_index_free = throw_index_init_size;
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throw_last_free = 0;
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}
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return throw_last_free;
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}
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// ------------------------------------------------------------------
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int throw_index_add(Throw* pointer) {
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int index = throw_index_find_free();
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throw_index[index] = pointer;
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throw_last_free = -1;
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throw_index_free--;
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return index;
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}
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// ------------------------------------------------------------------
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void throw_index_remove(int index) {
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throw_index[index] = NULL;
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throw_last_free = index;
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throw_index_free++;
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}
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// ------------------------------------------------------------------
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Throw* throw_find_overrun(Throw* pointer) {
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Throw* last_candidate = NULL;
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long last_diff = LONG_MAX;
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Throw** i = throw_index;
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for(int n=0; n<throw_index_size; n++,i++) {
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long diff = (uint32_t)*i - (uint32_t)pointer;
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if((diff > 0) and (diff < last_diff)) {
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last_candidate = *i;
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last_diff = diff;
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}
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}
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return last_candidate;
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}
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// ------------------------------------------------------------------
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Throw* throw_find_underrun(Throw* pointer) {
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Throw* last_candidate = NULL;
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long last_diff = LONG_MAX;
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Throw** i = throw_index;
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for(int n=0; n<throw_index_size; n++,i++) {
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long diff = (uint32_t)pointer - (uint32_t)*i;
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if((diff > 0) and (diff < last_diff)) {
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last_candidate = *i;
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last_diff = diff;
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}
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}
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return last_candidate;
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}
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// ------------------------------------------------------------------
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// Dump pointer information to the log
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#if defined(GTHROW_LOG)
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void throw_printdl(Throw* dl) {
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char buf[100];
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char* ptr = (char*)throw_dltoptr(dl);
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TLOG->printf(": Ptr (%p,%u) at [%s,%u].", ptr, (uint)dl->nbytes, CleanFilename(dl->file), (uint)dl->line);
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TLOG->printf(": %s", HexDump16(buf, ptr, dl->nbytes, HEX_DUMP2));
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}
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#else
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inline void throw_printdl(Throw* dl) {}
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#endif
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// ------------------------------------------------------------------
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// Debugging new
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void throw_new_debug(const void* __ptr, const char* __file, int __line) {
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if(__ptr == NULL) {
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#if defined(GTHROW_LOG)
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TLOG->errmemory(__file, __line);
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TLOG->printf("! A memory allocation failed (out of memory).");
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TLOG->printf("+ Advice: Restart.");
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#endif
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MemoryErrorExit();
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}
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}
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// ------------------------------------------------------------------
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// Debugging strdup()
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char* throw_strdup_debug(const char* __str, const char* __file, int __line) {
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char* _ptr = (char*)(__str ? throw_calloc_debug(1, strlen(__str)+1, __file, __line) : NULL);
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return _ptr ? strcpy(_ptr, __str) : _ptr;
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}
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// ------------------------------------------------------------------
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// Debugging malloc()
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void* throw_malloc_debug(size_t __size, const char* __file, int __line) {
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void* _ptr = throw_calloc_debug(1, __size, __file, __line);
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if(_ptr)
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memset(_ptr, MALLOCVAL, __size);
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return _ptr;
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}
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// ------------------------------------------------------------------
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// Debugging calloc()
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void* throw_calloc_debug(size_t __items, size_t __size, const char* __file, int __line) {
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__size *= __items;
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__size += throw_alloc_extra;
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if(__size == 0) {
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#if defined(GTHROW_LOG)
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TLOG->errmemory(__file, __line);
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TLOG->printf("! Attempted to allocate zero bytes of memory.");
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TLOG->printf("+ Advice: This is a bug. Please report to the Author.");
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#endif
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MemoryErrorExit();
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}
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size_t _siz = sizeof(Throw) + __size + sizeof(AFTERVAL) - 1;
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Throw* dl = (Throw*)calloc(_siz, 1);
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if(dl == NULL) {
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#if defined(GTHROW_LOG)
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TLOG->errmemory(__file, __line);
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TLOG->printf("! A memory allocation failed (out of memory).");
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TLOG->printf(": Needed %u (%Xh) bytes.", (uint)__size, (uint)__size);
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if(__size == BAD_SIZE) {
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TLOG->printf("+ Info: Value could be from free'd data.");
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TLOG->printf("+ Info: This indicates a serious bug.");
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TLOG->printf("+ Advice: Report to the Author immediately.");
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}
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else if(__size == MALLOC_SIZE) {
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TLOG->printf("+ Info: Value could be from uninitialized data");
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TLOG->printf("+ Info: This indicates a serious bug.");
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TLOG->printf("+ Advice: Report to the Author immediately.");
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}
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else {
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TLOG->printf("+ Advice: Restart.");
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}
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#endif
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MemoryErrorExit();
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}
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dl->index = throw_index_add(dl);
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dl->file = __file;
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dl->line = __line;
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dl->nbytes = __size;
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dl->beforeval = BEFOREVAL;
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*(dword*)&(dl->data[__size]) = AFTERVAL;
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dl->next = throw_alloclist.next;
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dl->prev = &throw_alloclist;
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throw_alloclist.next = dl;
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if(dl->next != NULL)
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dl->next->prev = dl;
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throw_count++;
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throw_max_count = maximum_of_two(throw_count, throw_max_count);
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throw_allocations++;
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return throw_dltoptr(dl);
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}
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// ------------------------------------------------------------------
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// Debugging realloc()
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void* throw_realloc_debug(void* __oldptr, size_t __size, const char* __file, int __line) {
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void* _ptr;
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Throw* dl = throw_ptrtodl(__oldptr);
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if(__size == 0) {
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throw_free_debug(__oldptr,__file,__line);
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_ptr = NULL;
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}
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else if(__oldptr == NULL) {
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_ptr = throw_malloc_debug(__size,__file,__line);
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}
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else {
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_ptr = throw_malloc_debug(__size,__file,__line);
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if(dl->nbytes < __size)
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__size = dl->nbytes;
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memcpy(_ptr,__oldptr,__size);
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throw_free_debug(__oldptr,__file,__line);
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}
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return _ptr;
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}
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// ------------------------------------------------------------------
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// Debugging free()
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void throw_free_debug(void* __ptr, const char* __file, int __line) {
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Throw* dl;
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Throw* overrun_dl = NULL;
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Throw* underrun_dl = NULL;
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if(__ptr == NULL)
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return;
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int inerr = false;
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if(throw_count <= 0) {
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#if defined(GTHROW_LOG)
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TLOG->errmemory(__file, __line);
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TLOG->printf("! More free's than allocs.");
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TLOG->printf("+ Info: This indicates a potentially serious bug.");
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TLOG->printf("+ Advice: Report to the Author immediately.");
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#endif
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goto err;
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}
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dl = throw_ptrtodl(__ptr);
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if(dl->nbytes == BAD_SIZE) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! A memory allocation was already free'd.");
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#endif
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goto err2;
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}
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if(dl->beforeval != BEFOREVAL) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! An allocated memory region was underrun.");
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#endif
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dl->prev = dl->next = NULL;
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dl->file = NULL;
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underrun_dl = throw_find_underrun(dl);
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goto err2;
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}
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if(*(dword*)&dl->data[dl->nbytes] != AFTERVAL) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! An allocated memory region was overrun.");
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#endif
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overrun_dl = throw_find_overrun(dl);
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inerr = true;
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}
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if(inerr)
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goto err2;
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if(dl->prev)
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dl->prev->next = dl->next;
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if(dl->next)
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dl->next->prev = dl->prev;
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throw_index_remove(dl->index);
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memset(dl,BADVAL,sizeof(*dl)+dl->nbytes);
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throw_count--;
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free(dl);
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return;
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err2:
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throw_printdl(dl);
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if(underrun_dl) {
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#if defined(GTHROW_LOG)
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TLOG->printf("! Possibly caused by overrun in this allocation:");
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throw_printdl(underrun_dl);
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if(*(dword*)&underrun_dl->data[underrun_dl->nbytes] != AFTERVAL)
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TLOG->printf("! Overrun of previous allocation confirmed.");
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#endif
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}
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if(overrun_dl) {
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#if defined(GTHROW_LOG)
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TLOG->printf("! Possibly cause - Underrun in this allocation:");
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throw_printdl(overrun_dl);
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if(overrun_dl->beforeval != BEFOREVAL)
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TLOG->printf("! Underrun of previous allocation confirmed.");
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#endif
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}
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#if defined(GTHROW_LOG)
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TLOG->printf(": Detected while freeing the allocation.");
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TLOG->printf("+ Info: This indicates a serious bug.");
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TLOG->printf("+ Advice: Report to the Author immediately.");
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#endif
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err:
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//PointerErrorExit();
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;
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}
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// ------------------------------------------------------------------
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// Check all allocations
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void throw_check_debug(const char* __file, int __line) {
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Throw* dl = throw_alloclist.next;
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while(dl != NULL) {
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throw_checkptr_debug(throw_dltoptr(dl), __file, __line);
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dl = dl->next;
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}
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}
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// ------------------------------------------------------------------
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// Check individual allocation
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void throw_checkptr_debug(const void* __ptr, const char* __file, int __line) {
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int inerr = false;
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Throw* dl;
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Throw* overrun_dl = NULL;
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Throw* underrun_dl = NULL;
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if(__ptr == NULL) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! Found NULL pointer instead of allocated memory.");
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#endif
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goto err3;
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}
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dl = throw_ptrtodl(__ptr);
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if(dl->beforeval != BEFOREVAL) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! An allocated memory region was underrun.");
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#endif
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dl->prev = dl->next = NULL;
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dl->file = NULL;
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underrun_dl = throw_find_underrun(dl);
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goto err2;
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}
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if(*(dword*)&dl->data[dl->nbytes] != AFTERVAL) {
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#if defined(GTHROW_LOG)
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TLOG->errpointer(__file, __line);
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TLOG->printf("! An allocated memory region was overrun.");
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#endif
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overrun_dl = throw_find_overrun(dl);
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inerr = true;
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}
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if(inerr)
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goto err2;
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return;
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err2:
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throw_printdl(dl);
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if(underrun_dl) {
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#if defined(GTHROW_LOG)
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TLOG->printf("! Possibly caused by overrun in this allocation:");
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throw_printdl(underrun_dl);
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if(*(dword*)&underrun_dl->data[underrun_dl->nbytes] != AFTERVAL)
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TLOG->printf("! Overrun of previous allocation confirmed.");
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#endif
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}
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if(overrun_dl) {
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#if defined(GTHROW_LOG)
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TLOG->printf("! Possibly cause - Underrun in this allocation:");
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throw_printdl(overrun_dl);
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if(overrun_dl->beforeval != BEFOREVAL)
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TLOG->printf("! Underrun of previous allocation confirmed.");
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#endif
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}
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err3:
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#if defined(GTHROW_LOG)
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TLOG->printf(": Detected while checking the allocation.");
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TLOG->printf("+ Info: This indicates a serious bug.");
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TLOG->printf("+ Advice: Report to the Author immediately.");
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#endif
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PointerErrorExit();
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}
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// ------------------------------------------------------------------
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// Termination function
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static void throw_term(void) {
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if(throw_inited) {
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#if defined(GTHROW_LOG)
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if(throw_count)
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TLOG->printf("! Detected %i unfree'd memory allocation%s.", throw_count, throw_count==1?"":"s");
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if(not error_exit) {
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Throw* dl = throw_alloclist.next;
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int count = throw_count;
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for(; dl; ) {
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Throw* dl_next = dl->next;
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throw_printdl(dl);
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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);
|
|
}
|
|
|
|
|
|
// ------------------------------------------------------------------
|