75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
#include "OrcTestCommon.h"
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#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
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#include "llvm/ExecutionEngine/Orc/LazyReexports.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace llvm::orc;
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class LazyReexportsTest : public CoreAPIsBasedStandardTest {};
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static int dummyTarget() { return 42; }
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TEST_F(LazyReexportsTest, BasicLocalCallThroughManagerOperation) {
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// Create a callthrough manager for the host (if possible) and verify that
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// a call to the lazy call-through:
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// (1) Materializes the MU. This verifies that the symbol was looked up, and
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// that we didn't arrive at the target via some other path
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// (2) Returns the expected value (which we take as proof that the call
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// reached the target).
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auto JTMB = JITTargetMachineBuilder::detectHost();
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// Bail out if we can not detect the host.
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if (!JTMB) {
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consumeError(JTMB.takeError());
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return;
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}
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// Bail out if we can not build a local call-through manager.
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auto LCTM = createLocalLazyCallThroughManager(JTMB->getTargetTriple(), ES, 0);
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if (!LCTM) {
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consumeError(LCTM.takeError());
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return;
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}
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auto DummyTarget = ES.intern("DummyTarget");
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bool DummyTargetMaterialized = false;
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cantFail(JD.define(std::make_unique<SimpleMaterializationUnit>(
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SymbolFlagsMap({{DummyTarget, JITSymbolFlags::Exported}}),
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[&](MaterializationResponsibility R) {
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DummyTargetMaterialized = true;
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// No dependencies registered, can't fail.
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cantFail(R.notifyResolved(
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{{DummyTarget,
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JITEvaluatedSymbol(static_cast<JITTargetAddress>(
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reinterpret_cast<uintptr_t>(&dummyTarget)),
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JITSymbolFlags::Exported)}}));
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cantFail(R.notifyEmitted());
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})));
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unsigned NotifyResolvedCount = 0;
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auto NotifyResolved = [&](JITTargetAddress ResolvedAddr) {
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++NotifyResolvedCount;
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return Error::success();
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};
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auto CallThroughTrampoline = cantFail((*LCTM)->getCallThroughTrampoline(
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JD, DummyTarget, std::move(NotifyResolved)));
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auto CTTPtr = reinterpret_cast<int (*)()>(
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static_cast<uintptr_t>(CallThroughTrampoline));
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// Call twice to verify nothing unexpected happens on redundant calls.
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auto Result = CTTPtr();
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(void)CTTPtr();
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EXPECT_TRUE(DummyTargetMaterialized)
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<< "CallThrough did not materialize target";
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EXPECT_EQ(NotifyResolvedCount, 1U)
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<< "CallThrough should have generated exactly one 'NotifyResolved' call";
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EXPECT_EQ(Result, 42) << "Failed to call through to target";
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}
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