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llvm-project/compiler-rt/test/fuzzer/gc-sections.test

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[libFuzzer] Use lld-available for gc-sections.test. The lld feature is never available for libFuzzer tests, so gc-sections.test never actually runs. llvm-svn: 336926
2018-07-13 02:09:03 +08:00
REQUIRES: linux, lld-available
[libFuzzer] add linux-specific test for gc-sections llvm-svn: 313421
2017-09-16 07:07:18 +08:00
No gc-sections:
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t
RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
[SanitizerCoverage] Add associated metadata to 8-bit counters. Summary: This allows counters associated with unused functions to be dead-stripped along with their functions. This approach is the same one we used for PC tables. Fixes an issue where LLD removes an unused PC table but leaves the 8-bit counter. Reviewers: eugenis Reviewed By: eugenis Subscribers: llvm-commits, hiraditya, kcc Differential Revision: https://reviews.llvm.org/D49264 llvm-svn: 336941
2018-07-13 04:24:58 +08:00
With gc-sections. Currently, we can't remove unused code except with LLD.
[libFuzzer] Use lld-available for gc-sections.test. The lld feature is never available for libFuzzer tests, so gc-sections.test never actually runs. llvm-svn: 336926
2018-07-13 02:09:03 +08:00
RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -fuse-ld=lld -ffunction-sections -Wl,-gc-sections
[SanitizerCoverage] Add associated metadata to pc-tables. Summary: Using associated metadata rather than llvm.used allows linkers to perform dead stripping with -fsanitize-coverage=pc-table. Unfortunately in my local tests, LLD was the only linker that made use of this metadata. Partially addresses https://bugs.llvm.org/show_bug.cgi?id=34636 and fixes https://github.com/google/sanitizers/issues/971. Reviewers: eugenis Reviewed By: eugenis Subscribers: Dor1s, hiraditya, llvm-commits, kcc Differential Revision: https://reviews.llvm.org/D48203 llvm-svn: 334858
2018-06-16 04:12:58 +08:00
RUN: nm %t | not grep UnusedFunctionShouldBeRemovedByLinker
[SanitizerCoverage] Add associated metadata to 8-bit counters. Summary: This allows counters associated with unused functions to be dead-stripped along with their functions. This approach is the same one we used for PC tables. Fixes an issue where LLD removes an unused PC table but leaves the 8-bit counter. Reviewers: eugenis Reviewed By: eugenis Subscribers: llvm-commits, hiraditya, kcc Differential Revision: https://reviews.llvm.org/D49264 llvm-svn: 336941
2018-07-13 04:24:58 +08:00
RUN: %run %t -runs=0 2>&1 | FileCheck %s
[libFuzzer] add linux-specific test for gc-sections llvm-svn: 313421
2017-09-16 07:07:18 +08:00
[SanitizerCoverage] Add associated metadata to PC guards. Summary: Without this metadata LLD strips unused PC table entries but won't strip unused guards. This metadata also seems to influence the linker to change the ordering in the PC guard section to match that of the PC table section. The libFuzzer runtime library depends on the ordering of the PC table and PC guard sections being the same. This is not generally guaranteed, so we may need to redesign PC tables/guards/counters in the future. Reviewers: eugenis Reviewed By: eugenis Subscribers: kcc, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D50483 llvm-svn: 339733
2018-08-15 06:04:34 +08:00
CHECK-NOT: ERROR: The size of coverage PC tables does not match