gistfile1.txt

typedef void* (*MALLOC)(size_t);
MALLOC old_malloc;

typedef void (*FREE)(intptr_t);
FREE old_free;

void* new_malloc(size_t s)
{
    void *addr = old_malloc(s+32);

    *(size_t*)((char*)addr+16) = s;
    *(uint32_t*)((char*)addr+16+8) = 0x11223344;

    void *stack[1]={0};
    CaptureStackBackTrace(2,1,stack,NULL);
    *(intptr_t*)((char*)addr+0) = (intptr_t)stack[0] - Core::getInstance().vinfo->getRebaseDelta();

    return (char*)addr+32;
}

void new_free(intptr_t p)
{
    if (!p)
        return;

    if (*(uint32_t*)((char*)p-8) == 0x11223344)
        p -= 32;

    old_free(p);     
}

void patch_malloc()
{
    // 43.05 64bit
    // intptr_t faddr = 0x140c49750 + Core::getInstance().vinfo->getRebaseDelta();
    // intptr_t maddr = 0x140c49758 + Core::getInstance().vinfo->getRebaseDelta();

    // 44.02 64bit
    // intptr_t faddr = 0x140cd9750 + Core::getInstance().vinfo->getRebaseDelta();
    // intptr_t maddr = 0x140cd9758 + Core::getInstance().vinfo->getRebaseDelta();

    // 44.02 32bit
    intptr_t faddr = 0xed738c + Core::getInstance().vinfo->getRebaseDelta();
    intptr_t maddr = 0xe85994 + Core::getInstance().vinfo->getRebaseDelta(); //malloc call in operator new

    old_malloc = (MALLOC)&malloc;
    old_free = *(FREE*)faddr;

    MemoryPatcher *mp = new MemoryPatcher(Core::getInstance().p);

    mp->makeWritable((void*)maddr, sizeof(intptr_t));
    intptr_t nm = (intptr_t)&new_malloc - maddr - 4;
    memcpy((void*)maddr, &nm, sizeof(intptr_t));
    
    mp->makeWritable((void*)faddr, sizeof(intptr_t));
    intptr_t nf = (intptr_t)&new_free;
    memcpy((void*)faddr, &nf, sizeof(intptr_t));
}