《Linux部分》
【Linux => Debug模式】
测试：https://github.com/bombela/backward-cpp
仅头文件的库，配合#define BACKWARD_HAS_BFD 1和sudo apt install binutils-dev
可以实现Debug下精准找点。
也有apt-get install libdw-dev(#define BACKWARD_HAS_DW 1)和
apt-get install libdwarf-dev(#define BACKWARD_HAS_DWARF 1)这两个没测试。
使用方法为：
#define BACKWARD_HAS_BFD 1
#include "backward.hpp"
#include <csignal>
#include <iostream>
#include <thread>
#include <fstream>
void sig_handler(int sig)
{
backward::StackTrace st;
st.load_here(32);
backward::Printer p;
p.print(st);
std::ofstream fs("stacktrace.log");
p.print(st, fs);
fs.close();
exit(1);
}
void th_sim()
{
std::this_thread::sleep_for(std::chrono::seconds(5));
// throw "Erro Auto";
int* p = nullptr;
*p = 33;
}
int main()
{
signal(SIGSEGV, sig_handler);
signal(SIGABRT, sig_handler);
signal(SIGFPE, sig_handler);
std::thread t(th_sim);
std::cout << "Done" << std::endl;
t.join();
return 0;
}
编译链接：target_link_libraries(dmeo PRIVATE bfd dl)
《Windows部分》
【Windows => Debug模式】
#include "backward.hpp"
#include <windows.h>
使用方法：
LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS* exception)
{
backward::StackTrace st;
st.load_from(exception->ContextRecord);
backward::Printer p;
// 输出到控制台
p.print(st, std::cerr);
// 输出到文件
std::ofstream fs("stacktrace.log");
p.print(st, fs);
fs.close();
return EXCEPTION_EXECUTE_HANDLER; // 终止程序
}
显示初始化：backward::SignalHandling sh;而且必须在SetUnhandledExceptionFilter(ExceptionHandler); 后面。
如下：
#include <iostream>
#include <thread>
#include "backward.hpp"
#include <windows.h>
using namespace std;
LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS* exception)
{
backward::StackTrace st;
st.load_from(exception->ContextRecord);
backward::Printer p;
// 输出到控制台
p.print(st, std::cerr);
// 输出到文件
std::ofstream fs("stacktrace.log");
p.print(st, fs);
fs.close();
return EXCEPTION_EXECUTE_HANDLER; // 终止程序
}
void th_sim()
{
std::this_thread::sleep_for(std::chrono::seconds(5));
// throw "Erro Auto";
int* p = nullptr;
*p = 33;
}
int main()
{
SetUnhandledExceptionFilter(ExceptionHandler); // 注册全局异常处理
backward::SignalHandling sh;
// std::set_terminate(terminate_handler);
std::thread t(th_sim);
std::cout << "Done" << std::endl;
t.join();
return 0;
}
编译链接：
target_link_libraries(dumpdemo PRIVATE DbgHelp)
【Windows => Release模式】
实际测试，如果想生成dmp文件，就不能使用backward库（两者选一个）（不使用backward::SignalHandling sh;）。
void CreateMiniDump(EXCEPTION_POINTERS* exception) {
HANDLE hFile = CreateFile("crash114.dmp", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
return;
};
MINIDUMP_EXCEPTION_INFORMATION info;
info.ThreadId = GetCurrentThreadId();
info.ExceptionPointers = exception;
info.ClientPointers = TRUE;
MiniDumpWriteDump(
GetCurrentProcess(), GetCurrentProcessId(), hFile,
MiniDumpNormal, &info, NULL, NULL
);
CloseHandle(hFile);
}
使用backward堆栈信息打印有限，如下（测试代码见上方）：
Done
Stack trace (most recent call last):
#3 Object "", at 00007FFBD4A4E8D7, in BaseThreadInitThunk
#2 Object "", at 00007FFBD31C37B0, in wcsrchr
试图访问无效的地址。
#1 Object "", at 00007FF691A2208B, in ??
试图访问无效的地址。
#0 Object "", at 00007FF691A27EC2, in ??
而使用WinDbg分析Dump文件，信息如下：
FILE_IN_CAB: crash114.dmp
CONTEXT: (.ecxr)
rax=0000000000000000 rbx=0000019f92279e60 rcx=00000018c2d828f9
rdx=00000018ca1b2b0e rsi=00004e94914f0000 rdi=000009ac1b967bb8
rip=00007ff7b2f41682 rsp=00000084c57ff970 rbp=0000000000000000
r8=0000000000000083 r9=000000007ffe7000 r10=0000000000000001
r11=fffffffff8bcfdeb r12=0000000000000000 r13=0000000000000000
r14=b2f4fc0794908cf3 r15=0000000000000000
iopl=0 nv up ei pl zr na po nc
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246
dumpdemo+0x1682:
00007ff7`b2f41682 c70021000000 mov dword ptr [rax],21h ds:00000000`00000000=????????
Resetting default scope
EXCEPTION_RECORD: (.exr -1)
ExceptionAddress: 00007ff7b2f41682 (dumpdemo+0x0000000000001682)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 0000000000000001
Parameter[1]: 0000000000000000
Attempt to write to address 0000000000000000
PROCESS_NAME: dumpdemo.exe
WRITE_ADDRESS: 0000000000000000
ERROR_CODE: (NTSTATUS) 0xc0000005 - 0x%p 0x%p %s
EXCEPTION_CODE_STR: c0000005
EXCEPTION_PARAMETER1: 0000000000000001
EXCEPTION_PARAMETER2: 0000000000000000
STACK_TEXT:
00000084`c57ff970 00007ff7`b2f4126b : 000009aa`f19089b8 0000019f`92279e60 00000000`00000000 00000000`00000000 : dumpdemo+0x1682
00000084`c57ff9b0 00007ffb`d31c37b0 : 0000019f`92275720 00000000`00000000 00000000`00000000 00000000`00000000 : dumpdemo+0x126b
00000084`c57ff9e0 00007ffb`d4a4e8d7 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ucrtbase!thread_start<unsigned int (__cdecl*)(void *),1>+0x30
00000084`c57ffa10 00007ffb`d5b314fc : 00000000`00000000 00000000`00000000 000004f0`fffffb30 000004d0`fffffb30 : kernel32!BaseThreadInitThunk+0x17
00000084`c57ffa40 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x2c
STACK_COMMAND: ~4s; .ecxr ; kb
SYMBOL_NAME: dumpdemo+1682
MODULE_NAME: dumpdemo
IMAGE_NAME: dumpdemo.exe
FAILURE_BUCKET_ID: NULL_POINTER_WRITE_c0000005_dumpdemo.exe!Unknown
OS_VERSION: 10.0.26100.1
BUILDLAB_STR: ge_release
OSPLATFORM_TYPE: x64
OSNAME: Windows 10
FAILURE_ID_HASH: {78a98d01-ecf2-dbb7-c5b9-5fb9cd0cc5e2}
Followup: MachineOwner
---------
0:004> .ecxr
rax=0000000000000000 rbx=0000019f92279e60 rcx=00000018c2d828f9
rdx=00000018ca1b2b0e rsi=00004e94914f0000 rdi=000009ac1b967bb8
rip=00007ff7b2f41682 rsp=00000084c57ff970 rbp=0000000000000000
r8=0000000000000083 r9=000000007ffe7000 r10=0000000000000001
r11=fffffffff8bcfdeb r12=0000000000000000 r13=0000000000000000
r14=b2f4fc0794908cf3 r15=0000000000000000
iopl=0 nv up ei pl zr na po nc
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246
dumpdemo+0x1682:
00007ff7`b2f41682 c70021000000 mov dword ptr [rax],21h ds:00000000`00000000=????????
0:004> kb
*** Stack trace for last set context - .thread/.cxr resets it
# RetAddr : Args to Child : Call Site
00 00007ff7`b2f4126b : 000009aa`f19089b8 0000019f`92279e60 00000000`00000000 00000000`00000000 : dumpdemo+0x1682
01 00007ffb`d31c37b0 : 0000019f`92275720 00000000`00000000 00000000`00000000 00000000`00000000 : dumpdemo+0x126b
02 00007ffb`d4a4e8d7 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ucrtbase!thread_start<unsigned int (__cdecl*)(void *),1>+0x30
03 00007ffb`d5b314fc : 00000000`00000000 00000000`00000000 000004f0`fffffb30 000004d0`fffffb30 : kernel32!BaseThreadInitThunk+0x17
04 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x2c