根据堆内的内存地址查找哪个函数分配了堆 [英] Finding which function allocated a heap based on a memory address within the heap

问题描述

所以我知道一个内存地址(例如:12208e6c)在一个特定的堆中.使用windbg，有没有办法确定这个堆的起始地址是什么以及哪个函数负责分配它?

So I know that a memory address (eg: 12208e6c) is within a specific heap.Using windbg, is there a way to determine what the starting address for this heap is and which function was responsible for allocating it?

推荐答案

!address <address> 为您提供有关包含地址的堆的信息:

!address <address> gives you information about the heap an address is contained in:

0:005> !address 03051234
Usage:                  Heap
Base Address:           03050000
End Address:            0307c000
Region Size:            0002c000
State:                  00001000    MEM_COMMIT
Protect:                00000004    PAGE_READWRITE
Type:                   00020000    MEM_PRIVATE
Allocation Base:        03050000
Allocation Protect:     00000004    PAGE_READWRITE
More info:              heap owning the address: !heap 0x3050000
More info:              heap segment
More info:              heap entry containing the address: !heap -x 0x3051234

基地址"就是您所说的起始地址".

The "Base Address" is what you called the "starting address".

要找出谁分配了该堆，您必须启用名为创建用户模式堆栈跟踪数据库"的功能并在 GFlags 中设置缓冲区大小.

To find out who allocated that heap, you have to enable a feature called "Create user mode stack trace database" and set a buffer size in GFlags.

这样做后，您可以像这样找到分配调用堆栈:

After doing so, you can find out the allocation call stack like this:

0:005> !gflag
Current NtGlobalFlag contents: 0x00001000
    ust - Create user mode stack trace database

0:005> !heap -p -a 00591234
    address 00591234 found in
    _HEAP @ 590000
      HEAP_ENTRY Size Prev Flags    UserPtr UserSize - state
        00590f28 0103 0000  [00]   00590f40    00800 - (busy)
          msvcrt!_iob
        7782e159 ntdll!RtlAllocateHeap+0x00000274
        7629ade8 msvcrt!_calloc_impl+0x00000136
        7629ae43 msvcrt!_calloc_crt+0x00000016
        762a1e48 msvcrt!__initstdio+0x0000000d
        762a1fc8 msvcrt!_cinit+0x0000001e
        762a1a94 msvcrt!_core_crt_dll_init+0x000001b2
        7629a48c msvcrt!_CRTDLL_INIT+0x0000001b
        777e92e0 ntdll!__RtlUserThreadStart+0x00000021
        777f061b ntdll!RtlpAllocateHeap+0x0000083a
        777f6d84 ntdll!LdrpInitializeProcess+0x0000137e
        777f583e ntdll!RtlSetEnvironmentVariable+0x00000020
        777e9809 ntdll!LdrpUpdateLoadCount2+0x00000047

这篇关于根据堆内的内存地址查找哪个函数分配了堆的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！