linux - 地址 sanitizer : No matching source file lines in the report after separating debuginfo

Question

CentOS Linux 版本 7.6.1810(核心)

g++ (GCC) 6.5.0

libasan3-6.3.1-3.1.el6.x86_64

我正在使用 AddressSanitizer 来检测内存错误。与常见的情况不同，我需要构建一个 rpm 包而不是编译源代码并直接运行它。我有下面的测试代码:

#include <iostream>
#include <string.h>

using namespace std;

//void test3(char*) __attribute__((no_sanitize_address));
//__attribute__((no_sanitize_address))
void test3(char *p){
    delete[] p;
    cout << *p << endl;
    cout << "test3" << endl;
}

//__attribute__((no_sanitize_address))
void test2(char *ptr, char *p){
    if(memcmp(ptr,p,6) == 0){
        cout << "Yes" << endl;
    }
    cout << "test2" << endl;
}

int main(){
    char *p = new char[5];
    char *ptr = new char[6];
    test2(ptr, p);
    test3(p);
    delete[] ptr;
    return 0;
}

编译标志是 -fsanitize=address -fno-omit-frame-pointer -fsanitize-recover=address -g -pipe -rdynamic -Wl,--build-id .
然后我使用 rpmbuild构建下面的 rpm 包:

Wrote: /root/rpmbuild/RPMS/x86_64/main_test-1.0.0-1.x86_64.rpm
Wrote: /root/rpmbuild/RPMS/x86_64/main_test-debuginfo-1.0.0-1.x86_64.rpm

安装后 main_test和 main_test-debuginfo , 我跑 main .现在的问题是 Asan 不报告任何源文件行。

=================================================================
==39137==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000eff5 at pc 0x7ffff6ecd328 bp 0x7fffffffe350 sp 0x7fffffffdb00
READ of size 6 at 0x60200000eff5 thread T0
    #0 0x7ffff6ecd327  (/usr/lib64/libasan.so.3+0x8d327)
    #1 0x400ee2 in test2(char*, char*) (/usr/local/bin/main+0x400ee2)
    #2 0x400f58 in main (/usr/local/bin/main+0x400f58)
    #3 0x7ffff62763d4 in __libc_start_main (/usr/lib64/libc.so.6+0x223d4)
    #4 0x400d58  (/usr/local/bin/main+0x400d58)

0x60200000eff5 is located 0 bytes to the right of 5-byte region [0x60200000eff0,0x60200000eff5)
allocated by thread T0 here:
    #0 0x7ffff6f02e70 in operator new[](unsigned long) (/usr/lib64/libasan.so.3+0xc2e70)
    #1 0x400f33 in main (/usr/local/bin/main+0x400f33)
    #2 0x7ffff62763d4 in __libc_start_main (/usr/lib64/libc.so.6+0x223d4)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/usr/lib64/libasan.so.3+0x8d327) 
...

然而，期望是:

=================================================================
==36210==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000eff5 at pc 0x7ffff6ecd328 bp 0x7fffffffe370 sp 0x7fffffffdb20
READ of size 6 at 0x60200000eff5 thread T0
    #0 0x7ffff6ecd327  (/usr/lib64/libasan.so.3+0x8d327)
    #1 0x400ee2 in test2(char*, char*) /home/matt/main_test-1.0.0/main.cpp:17
    #2 0x400f58 in main /home/matt/main_test-1.0.0/main.cpp:27
    #3 0x7ffff62763d4 in __libc_start_main (/usr/lib64/libc.so.6+0x223d4)
    #4 0x400d58  (/home/matt/main_test-1.0.0/main+0x400d58)

0x60200000eff5 is located 0 bytes to the right of 5-byte region [0x60200000eff0,0x60200000eff5)
allocated by thread T0 here:
    #0 0x7ffff6f02e70 in operator new[](unsigned long) (/usr/lib64/libasan.so.3+0xc2e70)
    #1 0x400f33 in main /home/matt/main_test-1.0.0/main.cpp:24
    #2 0x7ffff62763d4 in __libc_start_main (/usr/lib64/libc.so.6+0x223d4)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/usr/lib64/libasan.so.3+0x8d327) 
...

似乎Asan无法链接源文件。我对出了什么问题感到困惑。有什么办法可以解决吗？
感谢你!

Answer 1

I'm confused with what went wrong.

AddressSanitizer 运行时可能未设置为使用单独的调试信息。
[ 更新: @fche 评论说 asan/libbacktrace 工具在 gcc 10.1 左右获得了单独的调试信息支持]
没有根本原因不能，但这不是大多数开发人员使用 AddressSanitizer 的方式。

Is there any way to solve it?

您有几个选择:

禁用 strip并在 rpmbuild 中单独生成调试信息. This answer可能有用。

使用 addr2line -fe /path/to/unstripped/binary 0x400ee2 0x400f58 ...事后恢复源文件/行信息。