gecko-dev/tools/trace-malloc/adreader.cpp
2012-05-21 12:12:37 +01:00

132 lines
3.3 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "adreader.h"
#include <stdio.h>
#include <string.h>
ADLog::ADLog()
: mEntryCount(0)
{
mEntries.mNext = static_cast<EntryBlock*>(&mEntries);
mEntries.mPrev = static_cast<EntryBlock*>(&mEntries);
}
ADLog::~ADLog()
{
for (const_iterator entry = begin(), entry_end = end();
entry != entry_end; ++entry) {
free((void*) (*entry)->type);
free((char*) (*entry)->data);
free((char*) (*entry)->allocation_stack);
}
for (EntryBlock *b = mEntries.mNext, *next; b != &mEntries; b = next) {
next = b->mNext;
delete b;
}
}
bool
ADLog::Read(const char* aFileName)
{
FILE *in = fopen(aFileName, "r");
if (!in) {
return false;
}
while (!feof(in)) {
unsigned int ptr;
char typebuf[256];
int datasize;
int res = fscanf(in, "%x %s (%d)\n", &ptr, typebuf, &datasize);
if (res == EOF)
break;
if (res != 3) {
return false;
}
size_t data_mem_size = ((datasize + sizeof(unsigned long) - 1) /
sizeof(unsigned long)) * sizeof(unsigned long);
char *data = (char*)malloc(data_mem_size);
for (unsigned long *cur_data = (unsigned long*) data,
*cur_data_end = (unsigned long*) ((char*)data + data_mem_size);
cur_data != cur_data_end; ++cur_data) {
res = fscanf(in, " %lX\n", cur_data);
if (res != 1) {
return false;
}
}
char stackbuf[100000];
stackbuf[0] = '\0';
char *stack = stackbuf;
int len;
do {
fgets(stack, sizeof(stackbuf) - (stack - stackbuf), in);
len = strlen(stack);
stack += len;
} while (len > 1);
if (mEntryCount % ADLOG_ENTRY_BLOCK_SIZE == 0) {
EntryBlock *new_block = new EntryBlock();
new_block->mNext = static_cast<EntryBlock*>(&mEntries);
new_block->mPrev = mEntries.mPrev;
mEntries.mPrev->mNext = new_block;
mEntries.mPrev = new_block;
}
size_t typelen = strlen(typebuf);
char *type = (char*)malloc(typelen-1);
strncpy(type, typebuf+1, typelen-2);
type[typelen-2] = '\0';
Entry *entry =
&mEntries.mPrev->entries[mEntryCount % ADLOG_ENTRY_BLOCK_SIZE];
entry->address = (Pointer)ptr;
entry->type = type;
entry->datasize = datasize;
entry->data = data;
entry->allocation_stack = strdup(stackbuf);
++mEntryCount;
}
return true;
}
ADLog::const_iterator::const_iterator(ADLog::EntryBlock *aBlock,
size_t aOffset)
{
SetBlock(aBlock);
mCur = mBlockStart + aOffset;
}
ADLog::const_iterator&
ADLog::const_iterator::operator++()
{
++mCur;
if (mCur == mBlockEnd) {
SetBlock(mBlock->mNext);
mCur = mBlockStart;
}
return *this;
}
ADLog::const_iterator&
ADLog::const_iterator::operator--()
{
if (mCur == mBlockStart) {
SetBlock(mBlock->mPrev);
mCur = mBlockEnd;
}
--mCur;
return *this;
}