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[MCJIT] Fix PR20656 by teaching MCJIT to honor ExecutionEngine's global mapping.

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This is important for users of the C API who can't supply custom symbol
resolvers yet.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243589 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2015-07-29 23:12:33 +00:00
parent 6fc1adf9c7
commit 7fe1972500
3 changed files with 48 additions and 2 deletions
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11
lib/ExecutionEngine/ExecutionEngine.cpp
View File

@ -189,10 +189,17 @@ uint64_t ExecutionEngineState::RemoveMapping(StringRef Name) {
}
std::string ExecutionEngine::getMangledName(const GlobalValue *GV) {
assert(GV->hasName() && "Global must have name.");
MutexGuard locked(lock);
Mangler Mang;
SmallString<128> FullName;
Mang.getNameWithPrefix(FullName, GV, false);
const DataLayout &DL =
GV->getParent()->getDataLayout().isDefault()
? getDataLayout()
: GV->getParent()->getDataLayout();
Mangler::getNameWithPrefix(FullName, GV->getName(), DL);
return FullName.str();
}

6
lib/ExecutionEngine/MCJIT/MCJIT.cpp
View File

@ -270,6 +270,12 @@ void MCJIT::finalizeModule(Module *M) {
RuntimeDyld::SymbolInfo MCJIT::findExistingSymbol(const std::string &Name) {
SmallString<128> FullName;
Mangler::getNameWithPrefix(FullName, Name, getDataLayout());
if (void *Addr = getPointerToGlobalIfAvailable(FullName))
return RuntimeDyld::SymbolInfo(static_cast<uint64_t>(
reinterpret_cast<uintptr_t>(Addr)),
JITSymbolFlags::Exported);
return Dyld.getSymbol(FullName);
}

33
unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp
View File

@ -488,3 +488,36 @@ TEST_F(MCJITCAPITest, yield) {
EXPECT_TRUE(didCallYield);
}
static int localTestFunc() {
return 42;
}
TEST_F(MCJITCAPITest, addGlobalMapping) {
SKIP_UNSUPPORTED_PLATFORM;
Module = LLVMModuleCreateWithName("testModule");
LLVMTypeRef FunctionType = LLVMFunctionType(LLVMInt32Type(), NULL, 0, 0);
LLVMValueRef MappedFn = LLVMAddFunction(Module, "mapped_fn", FunctionType);
Function = LLVMAddFunction(Module, "test_fn", FunctionType);
LLVMBasicBlockRef Entry = LLVMAppendBasicBlock(Function, "");
LLVMBuilderRef Builder = LLVMCreateBuilder();
LLVMPositionBuilderAtEnd(Builder, Entry);
LLVMValueRef RetVal = LLVMBuildCall(Builder, MappedFn, NULL, 0, "");
LLVMBuildRet(Builder, RetVal);
LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
LLVMDisposeMessage(Error);
buildMCJITOptions();
buildMCJITEngine();
LLVMAddGlobalMapping(Engine, MappedFn, reinterpret_cast<void*>(&localTestFunc));
buildAndRunPasses();
uint64_t raw = LLVMGetFunctionAddress(Engine, "test_fn");
int (*usable)() = (int (*)()) raw;
EXPECT_EQ(42, usable());
}