fb1e52f4d8
* Add overflow checked intrinsic abstractions that check on overflow. * Use them for memory allocation code. * Use size_t type for memory allocation code to support full platform dependent width. Fixes #3756.
435 lines
10 KiB
C++
435 lines
10 KiB
C++
/*************************************************************************/
|
|
/* memory_pool_static_malloc.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* http://www.godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
#include "memory_pool_static_malloc.h"
|
|
#include "error_macros.h"
|
|
#include "os/memory.h"
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include "os/copymem.h"
|
|
#include "os/os.h"
|
|
|
|
/**
|
|
* NOTE NOTE NOTE NOTE
|
|
* in debug mode, this prepends the memory size to the allocated block
|
|
* so BE CAREFUL!
|
|
*/
|
|
|
|
void* MemoryPoolStaticMalloc::alloc(size_t p_bytes,const char *p_description) {
|
|
|
|
#if DEFAULT_ALIGNMENT == 1
|
|
|
|
return _alloc(p_bytes, p_description);
|
|
|
|
#else
|
|
|
|
size_t total;
|
|
#if defined(_add_overflow)
|
|
if (_add_overflow(p_bytes, DEFAULT_ALIGNMENT, &total)) return NULL;
|
|
#else
|
|
total = p_bytes + DEFAULT_ALIGNMENT;
|
|
#endif
|
|
uint8_t* ptr = (uint8_t*)_alloc(total, p_description);
|
|
ERR_FAIL_COND_V( !ptr, ptr );
|
|
int ofs = (DEFAULT_ALIGNMENT - ((uintptr_t)ptr & (DEFAULT_ALIGNMENT - 1)));
|
|
ptr[ofs-1] = ofs;
|
|
return (void*)(ptr + ofs);
|
|
#endif
|
|
};
|
|
|
|
void* MemoryPoolStaticMalloc::_alloc(size_t p_bytes,const char *p_description) {
|
|
|
|
ERR_FAIL_COND_V(p_bytes==0,0);
|
|
|
|
MutexLock lock(mutex);
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
size_t total;
|
|
#if defined(_add_overflow)
|
|
if (_add_overflow(p_bytes, sizeof(RingPtr), &total)) return NULL;
|
|
#else
|
|
total = p_bytes + sizeof(RingPtr);
|
|
#endif
|
|
void *mem=malloc(total); /// add for size and ringlist
|
|
|
|
if (!mem) {
|
|
printf("**ERROR: out of memory while allocating %lu bytes by %s?\n", (unsigned long) p_bytes, p_description);
|
|
printf("**ERROR: memory usage is %lu\n", (unsigned long) get_total_usage());
|
|
};
|
|
|
|
ERR_FAIL_COND_V(!mem,0); //out of memory, or unreasonable request
|
|
|
|
/* setup the ringlist element */
|
|
|
|
RingPtr *ringptr = (RingPtr*)mem;
|
|
|
|
/* setup the ringlist element data (description and size ) */
|
|
|
|
ringptr->size = p_bytes;
|
|
ringptr->descr=p_description;
|
|
|
|
if (ringlist) { /* existing ringlist */
|
|
|
|
/* assign next */
|
|
ringptr->next = ringlist->next;
|
|
ringlist->next = ringptr;
|
|
/* assign prev */
|
|
ringptr->prev = ringlist;
|
|
ringptr->next->prev = ringptr;
|
|
} else { /* non existing ringlist */
|
|
|
|
ringptr->next=ringptr;
|
|
ringptr->prev=ringptr;
|
|
ringlist=ringptr;
|
|
|
|
}
|
|
|
|
total_mem+=p_bytes;
|
|
|
|
/* update statistics */
|
|
if (total_mem > max_mem )
|
|
max_mem = total_mem;
|
|
|
|
total_pointers++;
|
|
|
|
if (total_pointers > max_pointers)
|
|
max_pointers=total_pointers;
|
|
|
|
return ringptr + 1; /* return memory after ringptr */
|
|
|
|
#else
|
|
void *mem=malloc(p_bytes);
|
|
|
|
ERR_FAIL_COND_V(!mem,0); //out of memory, or unreasonable request
|
|
return mem;
|
|
#endif
|
|
}
|
|
|
|
|
|
void* MemoryPoolStaticMalloc::realloc(void *p_memory,size_t p_bytes) {
|
|
|
|
#if DEFAULT_ALIGNMENT == 1
|
|
|
|
return _realloc(p_memory,p_bytes);
|
|
#else
|
|
if (!p_memory)
|
|
return alloc(p_bytes);
|
|
|
|
size_t total;
|
|
#if defined(_add_overflow)
|
|
if (_add_overflow(p_bytes, DEFAULT_ALIGNMENT, &total)) return NULL;
|
|
#else
|
|
total = p_bytes + DEFAULT_ALIGNMENT;
|
|
#endif
|
|
uint8_t* mem = (uint8_t*)p_memory;
|
|
int ofs = *(mem-1);
|
|
mem = mem - ofs;
|
|
uint8_t* ptr = (uint8_t*)_realloc(mem, total);
|
|
ERR_FAIL_COND_V(ptr == NULL, NULL);
|
|
int new_ofs = (DEFAULT_ALIGNMENT - ((uintptr_t)ptr & (DEFAULT_ALIGNMENT - 1)));
|
|
if (new_ofs != ofs) {
|
|
|
|
//printf("realloc moving %i bytes\n", p_bytes);
|
|
movemem((ptr + new_ofs), (ptr + ofs), p_bytes);
|
|
ptr[new_ofs-1] = new_ofs;
|
|
};
|
|
return ptr + new_ofs;
|
|
#endif
|
|
};
|
|
|
|
void* MemoryPoolStaticMalloc::_realloc(void *p_memory,size_t p_bytes) {
|
|
|
|
if (p_memory==NULL) {
|
|
|
|
return alloc( p_bytes );
|
|
}
|
|
|
|
if (p_bytes==0) {
|
|
|
|
this->free(p_memory);
|
|
ERR_FAIL_COND_V( p_bytes < 0 , NULL );
|
|
return NULL;
|
|
}
|
|
|
|
MutexLock lock(mutex);
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
|
|
RingPtr *ringptr = (RingPtr*)p_memory;
|
|
ringptr--; /* go back an element to find the tingptr */
|
|
|
|
bool single_element = (ringptr->next == ringptr) && (ringptr->prev == ringptr);
|
|
bool is_list = ( ringlist == ringptr );
|
|
|
|
RingPtr *new_ringptr=(RingPtr*)::realloc(ringptr, p_bytes+sizeof(RingPtr));
|
|
|
|
ERR_FAIL_COND_V( new_ringptr == 0, NULL ); /// reallocation failed
|
|
|
|
/* actualize mem used */
|
|
total_mem -= new_ringptr->size;
|
|
new_ringptr->size = p_bytes;
|
|
total_mem += new_ringptr->size;
|
|
|
|
if (total_mem > max_mem ) //update statistics
|
|
max_mem = total_mem;
|
|
|
|
if (new_ringptr == ringptr )
|
|
return ringptr + 1; // block didn't move, don't do anything
|
|
|
|
if (single_element) {
|
|
|
|
new_ringptr->next=new_ringptr;
|
|
new_ringptr->prev=new_ringptr;
|
|
} else {
|
|
|
|
new_ringptr->next->prev=new_ringptr;
|
|
new_ringptr->prev->next=new_ringptr;
|
|
}
|
|
|
|
if (is_list)
|
|
ringlist=new_ringptr;
|
|
|
|
|
|
return new_ringptr + 1;
|
|
|
|
#else
|
|
return ::realloc( p_memory, p_bytes );
|
|
#endif
|
|
}
|
|
|
|
void MemoryPoolStaticMalloc::free(void *p_ptr) {
|
|
|
|
ERR_FAIL_COND( !MemoryPoolStatic::get_singleton());
|
|
|
|
#if DEFAULT_ALIGNMENT == 1
|
|
|
|
_free(p_ptr);
|
|
#else
|
|
|
|
uint8_t* mem = (uint8_t*)p_ptr;
|
|
int ofs = *(mem-1);
|
|
mem = mem - ofs;
|
|
|
|
_free(mem);
|
|
#endif
|
|
};
|
|
|
|
|
|
void MemoryPoolStaticMalloc::_free(void *p_ptr) {
|
|
|
|
MutexLock lock(mutex);
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
if (p_ptr==0) {
|
|
printf("**ERROR: STATIC ALLOC: Attempted free of NULL pointer.\n");
|
|
return;
|
|
};
|
|
|
|
RingPtr *ringptr = (RingPtr*)p_ptr;
|
|
|
|
ringptr--; /* go back an element to find the ringptr */
|
|
|
|
|
|
#if 0
|
|
{ // check for existing memory on free.
|
|
RingPtr *p = ringlist;
|
|
|
|
bool found=false;
|
|
|
|
if (ringlist) {
|
|
do {
|
|
if (p==ringptr) {
|
|
found=true;
|
|
break;
|
|
}
|
|
|
|
p=p->next;
|
|
} while (p!=ringlist);
|
|
}
|
|
|
|
if (!found) {
|
|
printf("**ERROR: STATIC ALLOC: Attempted free of unknown pointer at %p\n",(ringptr+1));
|
|
return;
|
|
}
|
|
|
|
}
|
|
#endif
|
|
/* proceed to erase */
|
|
|
|
bool single_element = (ringptr->next == ringptr) && (ringptr->prev == ringptr);
|
|
bool is_list = ( ringlist == ringptr );
|
|
|
|
if (single_element) {
|
|
/* just get rid of it */
|
|
ringlist=0;
|
|
|
|
} else {
|
|
/* auto-remove from ringlist */
|
|
if (is_list)
|
|
ringlist=ringptr->next;
|
|
|
|
ringptr->prev->next = ringptr->next;
|
|
ringptr->next->prev = ringptr->prev;
|
|
}
|
|
|
|
total_mem -= ringptr->size;
|
|
total_pointers--;
|
|
// catch more errors
|
|
zeromem(ringptr,sizeof(RingPtr)+ringptr->size);
|
|
::free(ringptr); //just free that pointer
|
|
|
|
#else
|
|
ERR_FAIL_COND(p_ptr==0);
|
|
|
|
::free(p_ptr);
|
|
#endif
|
|
}
|
|
|
|
|
|
size_t MemoryPoolStaticMalloc::get_available_mem() const {
|
|
|
|
return 0xffffffff;
|
|
}
|
|
|
|
size_t MemoryPoolStaticMalloc::get_total_usage() {
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
return total_mem;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
|
|
}
|
|
|
|
size_t MemoryPoolStaticMalloc::get_max_usage() {
|
|
|
|
return max_mem;
|
|
}
|
|
|
|
/* Most likely available only if memory debugger was compiled in */
|
|
int MemoryPoolStaticMalloc::get_alloc_count() {
|
|
|
|
return total_pointers;
|
|
}
|
|
void * MemoryPoolStaticMalloc::get_alloc_ptr(int p_alloc_idx) {
|
|
|
|
return 0;
|
|
}
|
|
const char* MemoryPoolStaticMalloc::get_alloc_description(int p_alloc_idx) {
|
|
|
|
|
|
return "";
|
|
}
|
|
size_t MemoryPoolStaticMalloc::get_alloc_size(int p_alloc_idx) {
|
|
|
|
return 0;
|
|
}
|
|
|
|
void MemoryPoolStaticMalloc::dump_mem_to_file(const char* p_file) {
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
ERR_FAIL_COND( !ringlist ); /** WTF BUG !? */
|
|
RingPtr *p = ringlist;
|
|
FILE *f = fopen(p_file,"wb");
|
|
|
|
do {
|
|
fprintf(f,"%p-%i-%s\n", p+1, (int)p->size, (p->descr?p->descr:"") );
|
|
p=p->next;
|
|
} while (p!=ringlist);
|
|
|
|
fclose(f);
|
|
#endif
|
|
|
|
}
|
|
|
|
MemoryPoolStaticMalloc::MemoryPoolStaticMalloc() {
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
total_mem=0;
|
|
total_pointers=0;
|
|
ringlist=0;
|
|
max_mem=0;
|
|
max_pointers=0;
|
|
|
|
|
|
#endif
|
|
|
|
mutex=NULL;
|
|
#ifndef NO_THREADS
|
|
|
|
mutex=Mutex::create(); // at this point, this should work
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
MemoryPoolStaticMalloc::~MemoryPoolStaticMalloc() {
|
|
|
|
Mutex *old_mutex=mutex;
|
|
mutex=NULL;
|
|
if (old_mutex)
|
|
memdelete(old_mutex);
|
|
|
|
#ifdef DEBUG_MEMORY_ENABLED
|
|
|
|
if (OS::get_singleton()->is_stdout_verbose()) {
|
|
if (total_mem > 0 ) {
|
|
printf("**ERROR: STATIC ALLOC: ** MEMORY LEAKS DETECTED **\n");
|
|
printf("**ERROR: STATIC ALLOC: %i bytes of memory in use at exit.\n",(int)total_mem);
|
|
|
|
if (1){
|
|
printf("**ERROR: STATIC ALLOC: Following is the list of leaked allocations: \n");
|
|
|
|
ERR_FAIL_COND( !ringlist ); /** WTF BUG !? */
|
|
RingPtr *p = ringlist;
|
|
|
|
do {
|
|
printf("\t%p - %i bytes - %s\n", (RingPtr*)(p+1), (int)p->size, (p->descr?p->descr:"") );
|
|
p=p->next;
|
|
} while (p!=ringlist);
|
|
|
|
printf("**ERROR: STATIC ALLOC: End of Report.\n");
|
|
};
|
|
|
|
printf("mem - max %i, pointers %i, leaks %i.\n",(int)max_mem,max_pointers,(int)total_mem);
|
|
} else {
|
|
|
|
printf("INFO: mem - max %i, pointers %i, no leaks.\n",(int)max_mem,max_pointers);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
|