2024-02-11 23:59:55 +00:00
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2024-10-02 21:05:39 +00:00
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== googletest
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googletest is vendored at release-1.8.0-3493-g0953a17a. It was copied
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verbatim via git archive and added here.
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== libbacktrace
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2024-10-02 23:24:41 +00:00
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libbacktrace was vendored from github.com/ianlancetaylor/libbacktrace
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2024-10-02 21:05:39 +00:00
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at commit 86885d14049fab06ef8a33aac51664230ca09200. We dont use its
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autotools build infrastructure and integrate it ourselves with mostly
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hardcoded config.h and our own Makefile.am bits. Those integration
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bits are in libbacktrace-integration in this subdirectory. Main
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motivation for such approach is that:
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*) we only need symbolization subset
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*) we want to avoid polluting global namespace of symbols. We arrange
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for all backtrace symbols to be prefixed tcmalloc_. See
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libbacktrace-integration/config.h.
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When updating libbacktrace check that all symbols are renamed by
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something like this:
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$ make libbacktrace.la
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$ objdump -t .libs/libbacktrace.a | grep ' g '
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Another notable thing is, we don't bother with mmap support for
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reading files metadata and debug info. We actually go to extra length
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to replace their alloc.c functions with our own. Our replacement
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improves performance some, but most notably it allows us to discard
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all the state allocated by libbacktrace. This enables us to not worry
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about any synchronization concerns or libbacktrace's lack of ability
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to "see" freshly dlopened modules if we did recommended path of doing
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thread-ful singleton backtrace state.
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