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[LibFuzzer] Provide stub implementation of __sanitizer_cov_trace_pc_indir

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Calls to this function are currently injected by the
``SanitizerCoverageModule`` pass when the both the ``indirect-calls``
and ``trace-pc`` sanitizer coverage options are enabled and the code
being instrumented has indirect calls. Previously because LibFuzzer did
not define this function this would lead to link errors when building
some of the tests on OSX.

Differential Revision: http://reviews.llvm.org/D20946

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271938 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Liew 2016-06-06 20:27:09 +00:00
parent f4135c634c
commit 47f223bd24
1 changed files with 9 additions and 1 deletions
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10
lib/Fuzzer/FuzzerTracePC.cpp
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@ -57,7 +57,15 @@ static void HandlePC(uint32_t PC) {
} // namespace fuzzer
extern "C" void __sanitizer_cov_trace_pc() {
extern "C" {
void __sanitizer_cov_trace_pc() {
fuzzer::HandlePC(static_cast<uint32_t>(
reinterpret_cast<uintptr_t>(__builtin_return_address(0))));
}
void __sanitizer_cov_trace_pc_indir(int *) {
// Stub to allow linking with code built with
// -fsanitize=indirect-calls,trace-pc.
// This isn't used currently.
}
}