diff options
| -rw-r--r-- | llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/Instrumentation/SanitizerCoverage/tracing.ll | 10 |
2 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp index fb7f8ec85d4..1b6d6d6f3c6 100644 --- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp +++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp @@ -418,6 +418,9 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) { return false; // Should not instrument sanitizer init functions. if (F.getName().startswith("__sanitizer_")) return false; // Don't instrument __sanitizer_* callbacks. + // Don't touch available_externally functions, their actual body is elewhere. + if (F.getLinkage() == GlobalValue::AvailableExternallyLinkage) + return false; // Don't instrument MSVC CRT configuration helpers. They may run before normal // initialization. if (F.getName() == "__local_stdio_printf_options" || diff --git a/llvm/test/Instrumentation/SanitizerCoverage/tracing.ll b/llvm/test/Instrumentation/SanitizerCoverage/tracing.ll index 209b9874cb2..860904c0f19 100644 --- a/llvm/test/Instrumentation/SanitizerCoverage/tracing.ll +++ b/llvm/test/Instrumentation/SanitizerCoverage/tracing.ll @@ -18,6 +18,12 @@ entry: ret void } +define available_externally void @external_bar(i32* %a) sanitize_address { +entry: + ret void +} + + ; CHECK_PC-LABEL: define void @foo ; CHECK_PC: call void @__sanitizer_cov_trace_pc ; CHECK_PC: call void @__sanitizer_cov_trace_pc @@ -33,6 +39,10 @@ entry: ; CHECK_PC_GUARD: call void @__sanitizer_cov_trace_pc_guard ; CHECK_PC_GUARD-NOT: call void @__sanitizer_cov_trace_pc ; CHECK_PC_GUARD: ret void +; CHECK_PC_GUARD-LABEL: @external_bar +; CHECK_PC_GUARD-NOT: call void @__sanitizer_cov_trace_pc +; CHECK_PC_GUARD: ret void + ; CHECK_PC_GUARD: call void @__sanitizer_cov_trace_pc_guard_init(i32* bitcast (i32** @__start___sancov_guards to i32*), i32* bitcast (i32** @__stop___sancov_guards to i32*)) ; CHECK_PC_GUARD_DARWIN-LABEL: define void @foo |
