[PATCH] D37156: [SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer

[Matt Morehouse via Phabricator via cfe-commits]

morehouse updated this revision to Diff 112756.
morehouse added a comment.

- Add weak reference in SanitizerCoverage.cpp


https://reviews.llvm.org/D37156

Files:
  llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp


Index: llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
===================================================================
--- llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -78,6 +78,9 @@
 
 static const char *const SanCovLowestStackName = "__sancov_lowest_stack";
 
+__attribute__((tls_model("initial-exec")))
+thread_local uintptr_t __sancov_lowest_stack;
+
 static cl::opt<int> ClCoverageLevel(
     "sanitizer-coverage-level",
     cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, "



Index: llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
===================================================================
--- llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -78,6 +78,9 @@
 
 static const char *const SanCovLowestStackName = "__sancov_lowest_stack";
 
+__attribute__((tls_model("initial-exec")))
+thread_local uintptr_t __sancov_lowest_stack;
+
 static cl::opt<int> ClCoverageLevel(
     "sanitizer-coverage-level",
     cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, "

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