[llvm] r227195 - [sancov] Fix unspecified constructor order between sancov and asan.

[Evgeniy Stepanov]

Author: eugenis
Date: Tue Jan 27 09:01:22 2015
New Revision: 227195

URL: http://llvm.org/viewvc/llvm-project?rev=227195&view=rev
Log:
[sancov] Fix unspecified constructor order between sancov and asan.

Sanitizer coverage constructor must run after asan constructor (for each DSO).
Bump constructor priority to guarantee that.

Modified:
    llvm/trunk/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
    llvm/trunk/test/Instrumentation/SanitizerCoverage/coverage.ll

Modified: llvm/trunk/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Instrumentation/SanitizerCoverage.cpp?rev=227195&r1=227194&r2=227195&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/SanitizerCoverage.cpp (original)
+++ llvm/trunk/lib/Transforms/Instrumentation/SanitizerCoverage.cpp Tue Jan 27 09:01:22 2015
@@ -59,7 +59,7 @@ static const char *const kSanCovIndirCal
 static const char *const kSanCovTraceEnter = "__sanitizer_cov_trace_func_enter";
 static const char *const kSanCovTraceBB = "__sanitizer_cov_trace_basic_block";
 static const char *const kSanCovModuleCtorName = "sancov.module_ctor";
-static const uint64_t    kSanCtorAndDtorPriority = 1;
+static const uint64_t    kSanCtorAndDtorPriority = 2;
 
 static cl::opt<int> ClCoverageLevel("sanitizer-coverage-level",
        cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, "

Modified: llvm/trunk/test/Instrumentation/SanitizerCoverage/coverage.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Instrumentation/SanitizerCoverage/coverage.ll?rev=227195&r1=227194&r2=227195&view=diff
==============================================================================
--- llvm/trunk/test/Instrumentation/SanitizerCoverage/coverage.ll (original)
+++ llvm/trunk/test/Instrumentation/SanitizerCoverage/coverage.ll Tue Jan 27 09:01:22 2015
@@ -29,6 +29,10 @@ entry:
   ret void
 }
 
+; CHECK0-NOT: @llvm.global_ctors = {{.*}}{ i32 2, void ()* @sancov.module_ctor }
+; CHECK1: @llvm.global_ctors = {{.*}}{ i32 2, void ()* @sancov.module_ctor }
+; CHECK2: @llvm.global_ctors = {{.*}}{ i32 2, void ()* @sancov.module_ctor }
+
 ; CHECK0-NOT: call void @__sanitizer_cov(
 ; CHECK0-NOT: call void @__sanitizer_cov_module_init(