#define DEBUG_TYPE "oprofile-jit-event-listener"
#include "llvm/Function.h"
+#include "llvm/Metadata.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/ExecutionEngine/JITEventListener.h"
#include "llvm/Support/Debug.h"
-#include "llvm/System/Errno.h"
+#include "llvm/Support/ValueHandle.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Errno.h"
#include "llvm/Config/config.h"
#include <stddef.h>
using namespace llvm;
-#if defined(USE_OPROFILE)
+#if USE_OPROFILE
#include <opagent.h>
virtual void NotifyFunctionEmitted(const Function &F,
void *FnStart, size_t FnSize,
const EmittedFunctionDetails &Details);
- virtual void NotifyFreeingMachineCode(const Function &F, void *OldPtr);
+ virtual void NotifyFreeingMachineCode(void *OldPtr);
};
OProfileJITEventListener::OProfileJITEventListener()
: Agent(op_open_agent()) {
if (Agent == NULL) {
const std::string err_str = sys::StrError();
- DOUT << "Failed to connect to OProfile agent: " << err_str << "\n";
+ DEBUG(dbgs() << "Failed to connect to OProfile agent: " << err_str << "\n");
} else {
- DOUT << "Connected to OProfile agent.\n";
+ DEBUG(dbgs() << "Connected to OProfile agent.\n");
}
}
if (Agent != NULL) {
if (op_close_agent(Agent) == -1) {
const std::string err_str = sys::StrError();
- DOUT << "Failed to disconnect from OProfile agent: " << err_str << "\n";
+ DEBUG(dbgs() << "Failed to disconnect from OProfile agent: "
+ << err_str << "\n");
} else {
- DOUT << "Disconnected from OProfile agent.\n";
+ DEBUG(dbgs() << "Disconnected from OProfile agent.\n");
}
}
}
+class FilenameCache {
+ // Holds the filename of each Scope, so that we can pass a null-terminated
+ // string into oprofile. Use an AssertingVH rather than a ValueMap because we
+ // shouldn't be modifying any MDNodes while this map is alive.
+ DenseMap<AssertingVH<MDNode>, std::string> Filenames;
+
+ public:
+ const char *getFilename(MDNode *Scope) {
+ std::string &Filename = Filenames[Scope];
+ if (Filename.empty()) {
+ Filename = DIScope(Scope).getFilename();
+ }
+ return Filename.c_str();
+ }
+};
+
+static debug_line_info LineStartToOProfileFormat(
+ const MachineFunction &MF, FilenameCache &Filenames,
+ uintptr_t Address, DebugLoc Loc) {
+ debug_line_info Result;
+ Result.vma = Address;
+ Result.lineno = Loc.getLine();
+ Result.filename = Filenames.getFilename(
+ Loc.getScope(MF.getFunction()->getContext()));
+ DEBUG(dbgs() << "Mapping " << reinterpret_cast<void*>(Result.vma) << " to "
+ << Result.filename << ":" << Result.lineno << "\n");
+ return Result;
+}
+
// Adds the just-emitted function to the symbol table.
void OProfileJITEventListener::NotifyFunctionEmitted(
const Function &F, void *FnStart, size_t FnSize,
- const EmittedFunctionDetails &) {
- const char *const FnName = F.getNameStart();
- assert(FnName != 0 && FnStart != 0 && "Bad symbol to add");
- if (op_write_native_code(Agent, FnName,
+ const EmittedFunctionDetails &Details) {
+ assert(F.hasName() && FnStart != 0 && "Bad symbol to add");
+ if (op_write_native_code(Agent, F.getName().data(),
reinterpret_cast<uint64_t>(FnStart),
FnStart, FnSize) == -1) {
- DOUT << "Failed to tell OProfile about native function " << FnName
- << " at [" << FnStart << "-" << ((char*)FnStart + FnSize) << "]\n";
+ DEBUG(dbgs() << "Failed to tell OProfile about native function "
+ << F.getName() << " at ["
+ << FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
+ return;
+ }
+
+ if (!Details.LineStarts.empty()) {
+ // Now we convert the line number information from the address/DebugLoc
+ // format in Details to the address/filename/lineno format that OProfile
+ // expects. Note that OProfile 0.9.4 has a bug that causes it to ignore
+ // line numbers for addresses above 4G.
+ FilenameCache Filenames;
+ std::vector<debug_line_info> LineInfo;
+ LineInfo.reserve(1 + Details.LineStarts.size());
+
+ DebugLoc FirstLoc = Details.LineStarts[0].Loc;
+ assert(!FirstLoc.isUnknown()
+ && "LineStarts should not contain unknown DebugLocs");
+ MDNode *FirstLocScope = FirstLoc.getScope(F.getContext());
+ DISubprogram FunctionDI = getDISubprogram(FirstLocScope);
+ if (FunctionDI.Verify()) {
+ // If we have debug info for the function itself, use that as the line
+ // number of the first several instructions. Otherwise, after filling
+ // LineInfo, we'll adjust the address of the first line number to point at
+ // the start of the function.
+ debug_line_info line_info;
+ line_info.vma = reinterpret_cast<uintptr_t>(FnStart);
+ line_info.lineno = FunctionDI.getLineNumber();
+ line_info.filename = Filenames.getFilename(FirstLocScope);
+ LineInfo.push_back(line_info);
+ }
+
+ for (std::vector<EmittedFunctionDetails::LineStart>::const_iterator
+ I = Details.LineStarts.begin(), E = Details.LineStarts.end();
+ I != E; ++I) {
+ LineInfo.push_back(LineStartToOProfileFormat(
+ *Details.MF, Filenames, I->Address, I->Loc));
+ }
+
+ // In case the function didn't have line info of its own, adjust the first
+ // line info's address to include the start of the function.
+ LineInfo[0].vma = reinterpret_cast<uintptr_t>(FnStart);
+
+ if (op_write_debug_line_info(Agent, FnStart,
+ LineInfo.size(), &*LineInfo.begin()) == -1) {
+ DEBUG(dbgs()
+ << "Failed to tell OProfile about line numbers for native function "
+ << F.getName() << " at ["
+ << FnStart << "-" << ((char*)FnStart + FnSize) << "]\n");
+ }
}
}
-// Removes the to-be-deleted function from the symbol table.
-void OProfileJITEventListener::NotifyFreeingMachineCode(
- const Function &F, void *FnStart) {
+// Removes the being-deleted function from the symbol table.
+void OProfileJITEventListener::NotifyFreeingMachineCode(void *FnStart) {
assert(FnStart && "Invalid function pointer");
if (op_unload_native_code(Agent, reinterpret_cast<uint64_t>(FnStart)) == -1) {
- DOUT << "Failed to tell OProfile about unload of native function "
- << F.getName() << " at " << FnStart << "\n";
+ DEBUG(dbgs()
+ << "Failed to tell OProfile about unload of native function at "
+ << FnStart << "\n");
}
}
}
}
-#else // !defined(USE_OPROFILE)
+#else // USE_OPROFILE
namespace llvm {
// By defining this to return NULL, we can let clients call it unconditionally,
}
} // namespace llvm
-#endif // defined(USE_OPROFILE)
+#endif // USE_OPROFILE
projects / oota-llvm.git / blobdiff