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| author | Max Moroz <mmoroz@chromium.org> | 2019-02-01 17:12:35 +0000 |
|---|---|---|
| committer | Max Moroz <mmoroz@chromium.org> | 2019-02-01 17:12:35 +0000 |
| commit | 123883807dfe583d85c4493d58f39275cc1ab6ba (patch) | |
| tree | 7ea0297e2b5fb3f299b3d775e892d3cc88b8f958 /clang/docs/SanitizerCoverage.rst | |
| parent | 58513b7761a92da26be08daa77329c5bc5b1a675 (diff) | |
| download | bcm5719-llvm-123883807dfe583d85c4493d58f39275cc1ab6ba.tar.gz bcm5719-llvm-123883807dfe583d85c4493d58f39275cc1ab6ba.zip | |
Update SanitizerCoverage doc regarding the issue with pc-table and gc-sections.
Summary:
There is a bug for this: https://bugs.llvm.org/show_bug.cgi?id=34636
But it would be also helpful to leave a note in the docs to prevent users from
running into issues, e.g. https://crbug.com/926588.
Reviewers: morehouse
Reviewed By: morehouse
Subscribers: cfe-commits, llvm-commits, kcc
Tags: #clang
Differential Revision: https://reviews.llvm.org/D57474
llvm-svn: 352890
Diffstat (limited to 'clang/docs/SanitizerCoverage.rst')
| -rw-r--r-- | clang/docs/SanitizerCoverage.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/clang/docs/SanitizerCoverage.rst b/clang/docs/SanitizerCoverage.rst index c5c50a5dd96..c7cd853dd66 100644 --- a/clang/docs/SanitizerCoverage.rst +++ b/clang/docs/SanitizerCoverage.rst @@ -144,6 +144,11 @@ PC-Table **Experimental, may change or disappear in future** +**Note:** this instrumentation might be incompatible with dead code stripping +(``-Wl,-gc-sections``) for linkers other than LLD, thus resulting in a +significant binary size overhead. For more information, see +`Bug 34636 <https://bugs.llvm.org/show_bug.cgi?id=34636>`_. + With ``-fsanitize-coverage=pc-table`` the compiler will create a table of instrumented PCs. Requires either ``-fsanitize-coverage=inline-8bit-counters`` or ``-fsanitize-coverage=trace-pc-guard``. |
