从 catch 块获取回溯

发布于 2024-10-04 12:06:22 字数 225 浏览 8 评论 0原文

我正在使用 backtrace 从异常位置获取信息被抛出。在异常的构造函数中,我将回溯存储在 std::string 中,并在此类异常的 catch 块中打印此回溯。

但我想知道,是否有可能以某种方式在其他异常类型的 catch 块中获得相同的回溯?

I am using backtrace to get the information from where the exception is thrown. In the constructor of my exception, I am storing the backtrace in a std::string, and in the catch block for exceptions of this type, I am printing this backtrace.

But I was wondering, is it possible to somehow get the same backtrace in the catch block for other exception types?

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童话 2024-10-11 12:06:22

您可能对正在开发的 Boost 库感兴趣:Portable Backtrace 。示例:

#include <boost/backtrace.hpp>
#include <iostream>

int foo()
{
    throw boost::runtime_error("My Error");
    return 10;
}

int bar()
{
    return foo()+20;
}


int main()
{
    try {
        std::cout << bar() << std::endl;
    }
    catch(std::exception const &e)
    {
        std::cerr << e.what() << std::endl;
        std::cerr << boost::trace(e);
    }
}

打印:

My Error
0x403fe1: boost::stack_trace::trace(void**, int) + 0x1b in ./test_backtrace
0x405451: boost::backtrace::backtrace(unsigned long) + 0x65 in ./test_backtrace
0x4054d2: boost::runtime_error::runtime_error(std::string const&) + 0x32 in ./test_backtrace
0x40417e: foo() + 0x44 in ./test_backtrace
0x40425c: bar() + 0x9 in ./test_backtrace
0x404271: main + 0x10 in ./test_backtrace
0x7fd612ecd1a6: __libc_start_main + 0xe6 in /lib/libc.so.6
0x403b39: __gxx_personality_v0 + 0x99 in ./test_backtrace

希望这有帮助!

You might be interested in a Boost library under development: Portable Backtrace. Example:

#include <boost/backtrace.hpp>
#include <iostream>

int foo()
{
    throw boost::runtime_error("My Error");
    return 10;
}

int bar()
{
    return foo()+20;
}


int main()
{
    try {
        std::cout << bar() << std::endl;
    }
    catch(std::exception const &e)
    {
        std::cerr << e.what() << std::endl;
        std::cerr << boost::trace(e);
    }
}

Prints:

My Error
0x403fe1: boost::stack_trace::trace(void**, int) + 0x1b in ./test_backtrace
0x405451: boost::backtrace::backtrace(unsigned long) + 0x65 in ./test_backtrace
0x4054d2: boost::runtime_error::runtime_error(std::string const&) + 0x32 in ./test_backtrace
0x40417e: foo() + 0x44 in ./test_backtrace
0x40425c: bar() + 0x9 in ./test_backtrace
0x404271: main + 0x10 in ./test_backtrace
0x7fd612ecd1a6: __libc_start_main + 0xe6 in /lib/libc.so.6
0x403b39: __gxx_personality_v0 + 0x99 in ./test_backtrace

Hope this helps!

醉梦枕江山 2024-10-11 12:06:22

我不这么认为。当执行程序在 catch 块中停止时,堆栈将展开,并且之前发生的所有内容都不再位于堆栈中。

I don't think so. When executons stops in catch block the stack is unwound, and all that has happened before is not in stack anymore.

虚拟世界 2024-10-11 12:06:22

Do the classes in question share a common base you can edit?

Otherwise, I provided a wonderful but terribly underappreciated answer at How can some code be run each time an exception is thrown in a Visual C++ program? ;-P Some others opined too.

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