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Register the gcov "writeout" at init time. Don't list this as a d'tor. Instead,

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inject some code in that will run via the "__mod_init_func" method that
registers the gcov "writeout" function to execute at exit time.

The problem is that the "__mod_term_func" method of specifying d'tors is
deprecated on Darwin. And it can lead to some ambiguities when dealing with
multiple libraries.
<rdar://problem/11110106>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157852 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-06-01 23:14:32 +00:00
parent 0984461dfb
commit 4a8fefaf83
1 changed files with 22 additions and 2 deletions
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24
lib/Transforms/Instrumentation/GCOVProfiling.cpp
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@ -22,6 +22,7 @@
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Instructions.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/DebugLoc.h"
@ -57,7 +58,6 @@ namespace {
virtual const char *getPassName() const {
return "GCOV Profiler";
}
private:
bool runOnModule(Module &M);
@ -517,6 +517,7 @@ bool GCOVProfiler::emitProfileArcs() {
}
}
}
insertCounterWriteout(CountersBySP);
}
@ -672,7 +673,26 @@ void GCOVProfiler::insertCounterWriteout(
}
Builder.CreateRetVoid();
InsertProfilingShutdownCall(WriteoutF, M);
// Create a small bit of code that registers the "__llvm_gcov_writeout"
// function to be executed at exit.
FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
Function *F = Function::Create(FTy, GlobalValue::InternalLinkage,
"__llvm_gcov_init", M);
F->setUnnamedAddr(true);
F->setLinkage(GlobalValue::InternalLinkage);
F->addFnAttr(Attribute::NoInline);
BB = BasicBlock::Create(*Ctx, "entry", F);
Builder.SetInsertPoint(BB);
FTy = FunctionType::get(Type::getInt32Ty(*Ctx),
PointerType::get(FTy, 0), false);
Function *AtExitFn =
Function::Create(FTy, GlobalValue::ExternalLinkage, "atexit", M);
Builder.CreateCall(AtExitFn, WriteoutF);
Builder.CreateRetVoid();
appendToGlobalCtors(*M, F, 0);
}
void GCOVProfiler::insertIndirectCounterIncrement() {