QT程序崩溃打印崩溃原因

这里我们要用到系统API

 

#include <DbgHelp.h>

使用方法：

在外面的程序中添加如下文件

dbgcrash.h

#ifndef DBGCRASH_H
#define DBGCRASH_H

#include <Windows.h>
#include <DbgHelp.h>
#include <iostream>
#include <vector>
// 崩溃信息
//
using namespace std;
const int MAX_ADDRESS_LENGTH = 32;
const int MAX_NAME_LENGTH = 1024;

struct CrashInfo
{
    CHAR ErrorCode[MAX_ADDRESS_LENGTH];
    CHAR Address[MAX_ADDRESS_LENGTH];
    CHAR Flags[MAX_ADDRESS_LENGTH];
};

// CallStack信息
//
struct CallStackInfo
{
    CHAR ModuleName[MAX_NAME_LENGTH];
    CHAR MethodName[MAX_NAME_LENGTH];
    CHAR FileName[MAX_NAME_LENGTH];
    CHAR LineNumber[MAX_NAME_LENGTH];
};

void SafeStrCpy(char* szDest, size_t nMaxDestSize, const char* szSrc);
CrashInfo GetCrashInfo(const EXCEPTION_RECORD *pRecord);
vector<CallStackInfo> GetCallStack(const CONTEXT *pContext);
LONG ApplicationCrashHandler(EXCEPTION_POINTERS *pException);
void printStack( void );

#endif // DBGCRASH_H

dbgcrash.cpp文件

#include "dbgcrash.h"

// 安全拷贝字符串函数
//
void SafeStrCpy(char* szDest, size_t nMaxDestSize, const char* szSrc)
{
    if (nMaxDestSize <= 0) return;
    if (strlen(szSrc) < nMaxDestSize)
    {
        strcpy_s(szDest, nMaxDestSize, szSrc);
    }
    else
    {
        strncpy_s(szDest, nMaxDestSize, szSrc, nMaxDestSize);
        szDest[nMaxDestSize-1] = '\0';
    }
}

// 得到程序崩溃信息
//
CrashInfo GetCrashInfo(const EXCEPTION_RECORD *pRecord)
{
    CrashInfo crashinfo;
    SafeStrCpy(crashinfo.Address, MAX_ADDRESS_LENGTH, "N/A");
    SafeStrCpy(crashinfo.ErrorCode, MAX_ADDRESS_LENGTH, "N/A");
    SafeStrCpy(crashinfo.Flags, MAX_ADDRESS_LENGTH, "N/A");

    sprintf_s(crashinfo.Address, "%08X", pRecord->ExceptionAddress);
    sprintf_s(crashinfo.ErrorCode, "%08X", pRecord->ExceptionCode);
    sprintf_s(crashinfo.Flags, "%08X", pRecord->ExceptionFlags);

    return crashinfo;
}

// 得到CallStack信息
//
vector<CallStackInfo> GetCallStack(const CONTEXT *pContext)
{
    HANDLE hProcess = GetCurrentProcess();

    SymInitialize(hProcess, NULL, TRUE);

    vector<CallStackInfo> arrCallStackInfo;

    CONTEXT c = *pContext;

    STACKFRAME64 sf;
    memset(&sf, 0, sizeof(STACKFRAME64));
    DWORD dwImageType = IMAGE_FILE_MACHINE_I386;

    // 不同的CPU类型，具体信息可查询MSDN
    //
#ifdef _M_IX86
    sf.AddrPC.Offset = c.Eip;
    sf.AddrPC.Mode = AddrModeFlat;
    sf.AddrStack.Offset = c.Esp;
    sf.AddrStack.Mode = AddrModeFlat;
    sf.AddrFrame.Offset = c.Ebp;
    sf.AddrFrame.Mode = AddrModeFlat;
#elif _M_X64
    dwImageType = IMAGE_FILE_MACHINE_AMD64;
    sf.AddrPC.Offset = c.Rip;
    sf.AddrPC.Mode = AddrModeFlat;
    sf.AddrFrame.Offset = c.Rsp;
    sf.AddrFrame.Mode = AddrModeFlat;
    sf.AddrStack.Offset = c.Rsp;
    sf.AddrStack.Mode = AddrModeFlat;
#elif _M_IA64
    dwImageType = IMAGE_FILE_MACHINE_IA64;
    sf.AddrPC.Offset = c.StIIP;
    sf.AddrPC.Mode = AddrModeFlat;
    sf.AddrFrame.Offset = c.IntSp;
    sf.AddrFrame.Mode = AddrModeFlat;
    sf.AddrBStore.Offset = c.RsBSP;
    sf.AddrBStore.Mode = AddrModeFlat;
    sf.AddrStack.Offset = c.IntSp;
    sf.AddrStack.Mode = AddrModeFlat;
#else
    #error "Platform not supported!"
#endif

    HANDLE hThread = GetCurrentThread();

    while (true)
    {
        // 该函数是实现这个功能的最重要的一个函数
        // 函数的用法以及参数和返回值的具体解释可以查询MSDN
        //
        if (!StackWalk64(dwImageType, hProcess, hThread, &sf, &c, NULL, SymFunctionTableAccess64, SymGetModuleBase64, NULL))
        {
            break;
        }

        if (sf.AddrFrame.Offset == 0)
        {
            break;
        }

        CallStackInfo callstackinfo;
        SafeStrCpy(callstackinfo.MethodName, MAX_NAME_LENGTH, "N/A");
        SafeStrCpy(callstackinfo.FileName, MAX_NAME_LENGTH, "N/A");
        SafeStrCpy(callstackinfo.ModuleName, MAX_NAME_LENGTH, "N/A");
        SafeStrCpy(callstackinfo.LineNumber, MAX_NAME_LENGTH, "N/A");

        BYTE symbolBuffer[sizeof(IMAGEHLP_SYMBOL64) + MAX_NAME_LENGTH];
        IMAGEHLP_SYMBOL64 *pSymbol = (IMAGEHLP_SYMBOL64*)symbolBuffer;
        memset(pSymbol, 0, sizeof(IMAGEHLP_SYMBOL64) + MAX_NAME_LENGTH);

        pSymbol->SizeOfStruct = sizeof(symbolBuffer);
        pSymbol->MaxNameLength = MAX_NAME_LENGTH;

        DWORD symDisplacement = 0;

        // 得到函数名
        //
        if (SymGetSymFromAddr64(hProcess, sf.AddrPC.Offset, NULL, pSymbol))
        {
            SafeStrCpy(callstackinfo.MethodName, MAX_NAME_LENGTH, pSymbol->Name);
        }

        IMAGEHLP_LINE64 lineInfo;
        memset(&lineInfo, 0, sizeof(IMAGEHLP_LINE64));

        lineInfo.SizeOfStruct = sizeof(IMAGEHLP_LINE64);

        DWORD dwLineDisplacement;

        // 得到文件名和所在的代码行
        //
        if (SymGetLineFromAddr64(hProcess, sf.AddrPC.Offset, &dwLineDisplacement, &lineInfo))
        {
            SafeStrCpy(callstackinfo.FileName, MAX_NAME_LENGTH, lineInfo.FileName);
            sprintf_s(callstackinfo.LineNumber, "%d", lineInfo.LineNumber);
        }

        IMAGEHLP_MODULE64 moduleInfo;
        memset(&moduleInfo, 0, sizeof(IMAGEHLP_MODULE64));

        moduleInfo.SizeOfStruct = sizeof(IMAGEHLP_MODULE64);

        // 得到模块名
        //
        if (SymGetModuleInfo64(hProcess, sf.AddrPC.Offset, &moduleInfo))
        {
            SafeStrCpy(callstackinfo.ModuleName, MAX_NAME_LENGTH, moduleInfo.ModuleName);
        }

        arrCallStackInfo.push_back(callstackinfo);
    }

    SymCleanup(hProcess);

    return arrCallStackInfo;
}

LONG ApplicationCrashHandler(EXCEPTION_POINTERS *pException)
{
    // 确保有足够的栈空间
    //
#ifdef _M_IX86
    if (pException->ExceptionRecord->ExceptionCode == EXCEPTION_STACK_OVERFLOW)
    {
        static char TempStack[1024 * 128];
        __asm mov eax,offset TempStack[1024 * 128];
        __asm mov esp,eax;
    }
#endif

    CrashInfo crashinfo = GetCrashInfo(pException->ExceptionRecord);

    // 输出Crash信息
    //
    cout << "ErrorCode: " << crashinfo.ErrorCode << endl;
    cout << "Address: " << crashinfo.Address << endl;
    cout << "Flags: " << crashinfo.Flags << endl;

    vector<CallStackInfo> arrCallStackInfo = GetCallStack(pException->ContextRecord);

    // 输出CallStack
    //
    cout << "CallStack: " << endl;
    for (vector<CallStackInfo>::iterator i = arrCallStackInfo.begin(); i != arrCallStackInfo.end(); ++i)
    {
        CallStackInfo callstackinfo = (*i);

        cout << callstackinfo.MethodName << "() : [" << callstackinfo.ModuleName << "] (File: " << callstackinfo.FileName << " @Line " << callstackinfo.LineNumber << ")" << endl;
    }

    // 这里弹出一个错误对话框并退出程序
    //
    FatalAppExit(-1,  L"*** Unhandled Exception! ***");

    return EXCEPTION_EXECUTE_HANDLER;
}

void printStack( void )
{
    unsigned int   i;
    void         * stack[ 100 ];
    unsigned short frames;
    SYMBOL_INFO  * symbol;
    HANDLE         process;

    process = GetCurrentProcess();

    SymInitialize( process, NULL, TRUE );

    frames               = CaptureStackBackTrace( 0, 100, stack, NULL );
    symbol               = ( SYMBOL_INFO * )calloc( sizeof( SYMBOL_INFO ) + 256 * sizeof( char ), 1 );
    symbol->MaxNameLen   = 255;
    symbol->SizeOfStruct = sizeof( SYMBOL_INFO );

    for( i = 0; i < frames; i++ )
    {
        SymFromAddr( process, ( DWORD64 )( stack[ i ] ), 0, symbol );

        printf( "%i: %s - 0x%0X\n", frames - i - 1, symbol->Name, symbol->Address );
    }

    free( symbol );
}

在.pro文件里添加

CONFIG += console

CONFIG -= app_bundle

#dbghelp

LIBS += dbghelp.lib

在mian函数入口添加：

// 设置处理Unhandled Exception的回调函数

//

SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)ApplicationCrashHandler);

这样程序崩溃就会打印出在哪里：