[ORC][JITLink] Non-debuginfo JITLink perf jitdump support.

This patch ports PerfJITEventListener to a JITLink plugin, but adds unwind
record support and drops debuginfo support temporarily. Debuginfo can be
enabled in the future by providing a way to obtain a DWARFContext from a
LinkGraph.

Reviewed By: lhames

Differential Revision: https://reviews.llvm.org/D146169

1 files changed, 19 insertions, 4 deletions

diff --git a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
index 64806b5..42ef651 100644
--- a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
+++ b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
@@ -28,8 +28,10 @@
 #include "llvm/ExecutionEngine/Orc/MachOPlatform.h"
 #include "llvm/ExecutionEngine/Orc/MapperJITLinkMemoryManager.h"
 #include "llvm/ExecutionEngine/Orc/ObjectFileInterface.h"
+#include "llvm/ExecutionEngine/Orc/PerfSupportPlugin.h"
 #include "llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h"
 #include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
+#include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderPerf.h"
 #include "llvm/ExecutionEngine/Orc/TargetProcess/RegisterEHFrames.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
@@ -140,6 +142,11 @@ static cl::opt<bool>
                     cl::desc("Enable debugger suppport (default = !-noexec)"),
                     cl::init(true), cl::Hidden, cl::cat(JITLinkCategory));
 
+static cl::opt<bool> PerfSupport("perf-support",
+                                 cl::desc("Enable perf profiling support"),
+                                 cl::init(false), cl::Hidden,
+                                 cl::cat(JITLinkCategory));
+
 static cl::opt<bool>
     NoProcessSymbols("no-process-syms",
                      cl::desc("Do not resolve to llvm-jitlink process symbols"),
@@ -243,10 +250,14 @@ static cl::opt<bool> UseSharedMemory(
 static ExitOnError ExitOnErr;
 
 static LLVM_ATTRIBUTE_USED void linkComponents() {
-  errs() << (void *)&llvm_orc_registerEHFrameSectionWrapper
-         << (void *)&llvm_orc_deregisterEHFrameSectionWrapper
-         << (void *)&llvm_orc_registerJITLoaderGDBWrapper
-         << (void *)&llvm_orc_registerJITLoaderGDBAllocAction;
+  errs() << "Linking in runtime functions\n"
+         << (void *)&llvm_orc_registerEHFrameSectionWrapper << '\n'
+         << (void *)&llvm_orc_deregisterEHFrameSectionWrapper << '\n'
+         << (void *)&llvm_orc_registerJITLoaderGDBWrapper << '\n'
+         << (void *)&llvm_orc_registerJITLoaderGDBAllocAction << '\n'
+         << (void *)&llvm_orc_registerJITLoaderPerfStart << '\n'
+         << (void *)&llvm_orc_registerJITLoaderPerfEnd << '\n'
+         << (void *)&llvm_orc_registerJITLoaderPerfImpl << '\n';
 }
 
 static bool UseTestResultOverride = false;
@@ -979,6 +990,10 @@ Session::Session(std::unique_ptr<ExecutorProcessControl> EPC, Error &Err)
     ObjLayer.addPlugin(ExitOnErr(
         GDBJITDebugInfoRegistrationPlugin::Create(this->ES, *MainJD, TT)));
 
+  if (PerfSupport && TT.isOSBinFormatELF())
+    ObjLayer.addPlugin(ExitOnErr(PerfSupportPlugin::Create(
+        this->ES.getExecutorProcessControl(), *MainJD, true)));
+
   // Set up the platform.
   if (TT.isOSBinFormatMachO() && !OrcRuntime.empty()) {
     if (auto P =