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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 <iostream>

#include "retrace.hpp"
#include "retrace_swizzle.hpp"


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 allocate " << size << " bytes.";
        return;
    }

    retrace::addRegion(address, buffer, size);
}


static void retrace_memcpy(trace::Call &call) {
    void * dest = retrace::toPointer(call.arg(0));
    void * src = retrace::toPointer(call.arg(1));
    size_t n = call.arg(2).toUInt();

    if (!dest || !src || !n) {
        return;
    }

    memcpy(dest, src, n);
}


const retrace::Entry retrace::stdc_callbacks[] = {
    {"malloc", &retrace_malloc},
    {"memcpy", &retrace_memcpy},
    {NULL, NULL}
};
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