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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* 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 <assert.h>
#include <string.h>
#include "glproc.hpp"
#include "trace_parser.hpp"
#include "retrace.hpp"
namespace retrace {
struct Region
{
void *buffer;
unsigned long long size;
};
typedef std::map<unsigned long long, Region> RegionMap;
static RegionMap regionMap;
// Iterator to the first region that contains the address
static RegionMap::iterator
lowerBound(unsigned long long address) {
RegionMap::iterator it = regionMap.lower_bound(address);
while (it != regionMap.begin() &&
it != regionMap.end() &&
it->first + it->second. size > address) {
--it;
}
return it;
}
// Iterator to the first region that not contains the address
static RegionMap::iterator
upperBound(unsigned long long address) {
RegionMap::iterator it = regionMap.upper_bound(address);
while (it != regionMap.end() &&
it->first + it->second.size > address) {
++it;
}
return it;
}
void
addRegion(unsigned long long address, void *buffer, unsigned long long size)
{
// Forget all regions that intersect this new one.
if (0) {
RegionMap::iterator start = lowerBound(address);
if (start != regionMap.end()) {
RegionMap::iterator stop = upperBound(address + size);
regionMap.erase(start, stop);
}
}
assert(buffer);
Region region;
region.buffer = buffer;
region.size = size;
regionMap[address] = region;
}
static RegionMap::iterator
lookupRegion(unsigned long long address) {
RegionMap::iterator it = regionMap.lower_bound(address);
if (it == regionMap.end() ||
it->first > address) {
if (it == regionMap.begin()) {
return regionMap.end();
} else {
--it;
}
}
assert(it->first <= address);
assert(it->first + it->second.size >= address);
return it;
}
void
delRegion(unsigned long long address) {
RegionMap::iterator it = lookupRegion(address);
if (it != regionMap.end()) {
regionMap.erase(it);
} else {
assert(0);
}
}
void
delRegionByPointer(void *ptr) {
RegionMap::iterator it = regionMap.begin();
while (it != regionMap.end()) {
if (it->second.buffer == ptr) {
regionMap.erase(it);
return;
}
}
assert(0);
}
void *
lookupAddress(unsigned long long address) {
RegionMap::iterator it = lookupRegion(address);
if (it != regionMap.end()) {
unsigned long long offset = address - it->first;
assert(offset < it->second.size);
return (char *)it->second.buffer + offset;
}
if (address >= 0x00400000) {
std::cerr << "warning: could not translate address 0x" << std::hex << address << std::dec << "\n";
}
return (void *)(uintptr_t)address;
}
class Translator : protected Trace::Visitor
{
protected:
bool bind;
void *result;
void visit(Trace::Null *) {
result = NULL;
}
void visit(Trace::Blob *blob) {
result = blob->toPointer(bind);
}
void visit(Trace::Pointer *p) {
result = lookupAddress(p->value);
}
public:
Translator(bool _bind) :
bind(_bind),
result(NULL)
{}
void * operator() (Trace::Value *node) {
_visit(node);
return result;
}
};
void *
toPointer(Trace::Value &value, bool bind) {
return Translator(bind) (&value);
}
static void retrace_malloc(Trace::Call &call) {
size_t size = call.arg(0).toUInt();
unsigned long long address = call.ret->toUIntPtr();
if (!address) {
return;
}
void *buffer = malloc(size);
if (!buffer) {
std::cerr << "error: failed to allocated " << size << " bytes.";
return;
}
addRegion(address, buffer, size);
}
static void retrace_memcpy(Trace::Call &call) {
void * dest = toPointer(call.arg(0));
void * src = toPointer(call.arg(1));
size_t n = call.arg(2).toUInt();
if (!dest || !src || !n) {
return;
}
memcpy(dest, src, n);
}
const retrace::Entry stdc_callbacks[] = {
{"malloc", &retrace_malloc},
{"memcpy", &retrace_memcpy},
{NULL, NULL}
};
} /* retrace */
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