Question

程序使用ReadProcessMemory扫描内存块以获取特定值。不幸的是，当我致电ReadProcessMemory时，我收到错误299.

void update_memblock(MEMBLOCK *mb)
{
    //variables
    static unsigned char tempbuf[128*1024];
    size_t bytes_left;
    size_t total_read;
    size_t bytes_to_read;
    size_t  bytes_read;
    size_t sizeMem;
    size_t MemoryBase;

    bytes_left = mb->size;
    total_read = 0;

    while (bytes_left)
    {

        bytes_to_read = (bytes_left > sizeof(tempbuf)) ? sizeof(tempbuf) :  bytes_left;
        ReadProcessMemory(mb->hProc ,mb->addr + total_read,mb->buffer, bytes_to_read, (SIZE_T*)&bytes_read);
        if (bytes_read != bytes_to_read)break;
        memcpy(mb->buffer + total_read, tempbuf,bytes_read);

        bytes_left -= bytes_read;
        total_read += bytes_read;
    }
    mb->size = total_read;
}

Answer 1

Erorr Code 299（0x12B）ERROR_PARTIAL_COPY ＆＃34;只完成了ReadProcessMemory或WriteProcessMemory请求的一部分＆＃34;

您之所以收到此错误，是因为您正在尝试从未分配的页面中读取内存，并且＃34;

您希望在每个内存页面上使用VirtualQueryEx()，这会产生MEMORY_BASIC_INFORMATION结构，其中包含2个注意变量：

状态：可以是MEM_COMMIT，MEM_FREE或MEM_RESERVE 保护：可以是Memory Protection Constants

中的任何一个

你想循环遍历所有内存页面，在它们上面调用VirtualQueryEx（）并跳过任何不好的页面。我想跳过所有状态的页面/区域！= MEM_COMMIT和Protect == PAGE_NOACCESS

这是一个伪代码示例：

MEMORY_BASIC_INFORMATION mbi = { 0 };

while (LoopingThroughTheMemories.bat)
{
    if (!VirtualQueryEx(hProc, currentMemoryAddress, &mbi, sizeof(mbi))) continue
    if (mbi.State != MEM_COMMIT || mbi.Protect == PAGE_NOACCESS) continue;

    //good mem region, do ReadProcessMemory() stuffs
}

ReadProcessMemory _out_ bytesread

1 个答案: