如何在AddressSanitizer错误上生成核心转储 [英] How to generate core dump on AddressSanitizer error

问题描述

我这样编译我的代码以启用Asan：

I compiled my code like this to enable Asan:

g++ -O0 -g -fsanitize=address -fno-omit-frame-pointer

但它永远不会产生核心转储，因此我以后可以检查错误。如何生成它？

but it never generates a core dump so that I can later examine the details of the error. How can I generate it?

推荐答案

您需要设置环境变量来请求核心转储

You need to set environment variable to request coredumps

export ASAN_OPTIONS=abort_on_error=1

此应该确实是默认值，但是由于历史原因，ASan只会以非零错误代码退出。

This should really be default but due to historic reasons ASan just exits with non-zero error code instead.

在64位系统上，您可能需要添加

On 64-bit systems you might need to add

export ASAN_OPTIONS=...:disable_coredump=0:unmap_shadow_on_exit=1

（核心转储默认情况下处于禁用状态，因为担心它们会太大）。

(coredumps are disabled by default there, in fear that they will be too large).

有关标志的完整列表您可以看到 Asan Wiki 。

For complete list of flags you can see Asan wiki.

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