diff options
Diffstat (limited to 'compiler-rt/test/ctx_profile/TestCases/generate-context.cpp')
-rw-r--r-- | compiler-rt/test/ctx_profile/TestCases/generate-context.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/compiler-rt/test/ctx_profile/TestCases/generate-context.cpp b/compiler-rt/test/ctx_profile/TestCases/generate-context.cpp new file mode 100644 index 0000000..981d617 --- /dev/null +++ b/compiler-rt/test/ctx_profile/TestCases/generate-context.cpp @@ -0,0 +1,103 @@ +// Simple integration test for contextual instrumentation +// +// Copy the header defining ContextNode. +// RUN: mkdir -p %t_include +// RUN: cp %llvm_src/include/llvm/ProfileData/CtxInstrContextNode.h %t_include/ +// +// Compile with ctx instrumentation "on". We treat "theRoot" as callgraph root. +// RUN: %clangxx %s -lclang_rt.ctx_profile -I%t_include -O2 -o %t.bin -mllvm -profile-context-root=theRoot +// +// Run the binary, and observe the profile fetch handler's output. +// RUN: %t.bin | FileCheck %s + +#include "CtxInstrContextNode.h" +#include <cstdio> +#include <iostream> + +using namespace llvm::ctx_profile; +extern "C" bool __llvm_ctx_profile_fetch(void *Data, + bool (*Writer)(void *, + const ContextNode &)); + +// avoid name mangling +extern "C" { +__attribute__((noinline)) void someFunction(int I) { + if (I % 2) + printf("check odd\n"); + else + printf("check even\n"); +} + +// block inlining because the pre-inliner otherwise will inline this - it's +// too small. +__attribute__((noinline)) void theRoot() { + printf("check 1\n"); + someFunction(1); +#pragma nounroll + for (auto I = 0; I < 2; ++I) { + someFunction(I); + } +} +} + +// Make sure the program actually ran correctly. +// CHECK: check 1 +// CHECK-NEXT: check odd +// CHECK-NEXT: check even +// CHECK-NEXT: check odd + +void printProfile(const ContextNode &Node, const std::string &Indent, + const std::string &Increment) { + std::cout << Indent << "Guid: " << Node.guid() << std::endl; + std::cout << Indent << "Entries: " << Node.entrycount() << std::endl; + std::cout << Indent << Node.counters_size() << " counters and " + << Node.callsites_size() << " callsites" << std::endl; + std::cout << Indent << "Counter values: "; + for (uint32_t I = 0U; I < Node.counters_size(); ++I) + std::cout << Node.counters()[I] << " "; + std::cout << std::endl; + for (uint32_t I = 0U; I < Node.callsites_size(); ++I) + for (const auto *N = Node.subContexts()[I]; N; N = N->next()) { + std::cout << Indent << "At Index " << I << ":" << std::endl; + printProfile(*N, Indent + Increment, Increment); + } +} + +// 8657661246551306189 is theRoot. We expect 2 callsites and 2 counters - one +// for the entry basic block and one for the loop. +// 6759619411192316602 is someFunction. We expect all context instances to show +// the same nr of counters and callsites, but the counters will be different. +// The first context is for the first callsite with theRoot as parent, and the +// second counter in someFunction will be 0 (we pass an odd nr, and the other +// path gets instrumented). +// The second context is in the loop. We expect 2 entries and each of the +// branches would be taken once, so the second counter is 1. +// CHECK-NEXT: Guid: 8657661246551306189 +// CHECK-NEXT: Entries: 1 +// CHECK-NEXT: 2 counters and 3 callsites +// CHECK-NEXT: Counter values: 1 2 +// CHECK-NEXT: At Index 1: +// CHECK-NEXT: Guid: 6759619411192316602 +// CHECK-NEXT: Entries: 1 +// CHECK-NEXT: 2 counters and 2 callsites +// CHECK-NEXT: Counter values: 1 0 +// CHECK-NEXT: At Index 2: +// CHECK-NEXT: Guid: 6759619411192316602 +// CHECK-NEXT: Entries: 2 +// CHECK-NEXT: 2 counters and 2 callsites +// CHECK-NEXT: Counter values: 2 1 + +bool profileWriter() { + return __llvm_ctx_profile_fetch( + nullptr, +[](void *, const ContextNode &Node) { + printProfile(Node, "", " "); + return true; + }); +} + +int main(int argc, char **argv) { + theRoot(); + // This would be implemented in a specific RPC handler, but here we just call + // it directly. + return !profileWriter(); +} |