[PATCH] D53114: [libFuzzer] Add test for SanitizerCoverage working on Mac even with -Wl, -dead_strip.

[Max Moroz via Phabricator via llvm-commits]

Dor1s created this revision.
Dor1s added reviewers: morehouse, kcc, george.karpenkov.
Herald added subscribers: Sanitizers, delcypher.

The corresponding asncov change: https://reviews.llvm.org/D53113.

Bug: https://bugs.chromium.org/p/chromium/issues/detail?id=892167


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D53114

Files:
  test/fuzzer/dead-stripping.test


Index: test/fuzzer/dead-stripping.test
===================================================================
--- /dev/null
+++ test/fuzzer/dead-stripping.test
@@ -0,0 +1,23 @@
+REQUIRES: darwin
+
+No dead_strip. Unused code is not removed.
+RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t
+RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
+RUN: %run %t -runs=0 2>&1 | FileCheck %s
+
+With dead_strip. Unused code is not removed.
+RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -Wl,-dead_strip
+RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
+RUN: %run %t -runs=0 2>&1 | FileCheck %s
+
+With dead_strip, with trace-pc. Unused code is removed.
+RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -fsanitize-coverage=0 -fsanitize-coverage=trace-pc -Wl,-dead_strip
+RUN: nm %t | not grep UnusedFunctionShouldBeRemovedByLinker
+RUN: %run %t -runs=0 2>&1 | FileCheck %s
+
+With dead_strip, with pc-table. Unused code is not removed.
+RUN: %cpp_compiler %S/GcSectionsTest.cpp -o %t -ffunction-sections -fsanitize-coverage=0 -fsanitize-coverage=trace-pc-guard,pc-table -Wl,-dead_strip
+RUN: nm %t | grep UnusedFunctionShouldBeRemovedByLinker | count 1
+RUN: %run %t -runs=0 2>&1 | FileCheck %s
+
+CHECK-NOT: ERROR: The size of coverage PC tables does not match


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