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stacktrace_from_exception on non-x86

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#163 7 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
cpp
Domain
devtools

Research direction

Reproduce the non-x86 build with the bootstrap.sh and b2 commands in the issue. Read src/exception_headers.h and src/from_exception.cpp, including is_libcpp_runtime, to trace the architecture and runtime checks. Done means the stacktrace library builds on non-x86 with GCC/libstdc++ without requiring the listed workarounds.

Written by the indexing model from the issue text.

Description

enhancement help wanted

I submitted the below to the mailing list, but I wanted to re-iterate it here for more eyes. https://lists.boost.org/Archives/boost/2024/04/256604.php

This feature is guarded by BOOST_STACKTRACE_ALWAYS_STORE_IN_PADDING, but that is only enabled on x86.
This means that

./bootstrap.sh --with-toolset=gcc --with-libraries=stacktrace
./b2 install threading=multi toolset=gcc

always fails to build on non-x86 platforms. There are three current workarounds:

  1. set boost.stacktrace.from_exception=off
  2. set BOOST_STACKTRACE_LIBCXX_RUNTIME_MAY_CAUSE_MEMORY_LEAK
  3. build with threading=single

(1) prevents me from using this feature. (2) shouldn't be needed on it's face because I'm using gcc/libstdc++. (3) affects more than stacktrace.

Is this an incidental error, or is there a reason I wasn't able to deduce as to why this feature can't be used on non-x86+libstdc++?

It seems like the check for libc++ on non-x86 can't be entirely done at compile time. I definitely understand wanting to alert users to the dangers of using this feature, but there also doesn't seem to be a good way of detecting the presence of libc++ at compile time (hence the need for is_libcpp_runtime).

Dominant language
C++
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Forks
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Avg merge
8d 20h
Merged PRs (30d)
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