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Add DMD-style function trace profiling. (#2477)

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Johan Engelen 2018-01-14 22:22:59 +01:00 • committed by GitHub
parent a73188c8e5
commit f2d9ff3424
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7 changed files with 62 additions and 7 deletions
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36
gen/functions.cpp
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@ -780,6 +780,35 @@ void defineParameters(IrFuncTy &irFty, VarDeclarations &parameters) {
}
}
void emitDMDStyleFunctionTrace(IRState &irs, FuncDeclaration *fd,
FuncGenState &funcGen) {
/* DMD-style profiling: wrap the entire function body in:
* trace_pro("funcname");
* try
* body;
* finally
* _c_trace_epi();
*/
// Call trace_pro("funcname")
{
auto fn = getRuntimeFunction(fd->loc, irs.module, "trace_pro");
auto funcname = DtoConstString(mangleExact(fd));
irs.ir->CreateCall(fn, {funcname});
}
// Push cleanup block that calls _c_trace_epi at function exit.
{
auto traceEpilogBB = irs.insertBB("trace_epi");
auto saveScope = irs.scope();
irs.scope() = IRScope(traceEpilogBB);
irs.ir->CreateCall(
getRuntimeFunction(fd->endloc, irs.module, "_c_trace_epi"));
funcGen.scopes.pushCleanup(traceEpilogBB, irs.scopebb());
irs.scope() = saveScope;
}
}
} // anonymous namespace
void DtoDefineFunction(FuncDeclaration *fd, bool linkageAvailableExternally) {
@ -1010,6 +1039,9 @@ void DtoDefineFunction(FuncDeclaration *fd, bool linkageAvailableExternally) {
emitInstrumentationFnEnter(fd);
if (global.params.trace && !fd->isCMain() && !fd->naked)
emitDMDStyleFunctionTrace(*gIR, fd, funcGen);
// disable frame-pointer-elimination for functions with inline asm
if (fd->hasReturnExp & 8) // has inline asm
{
@ -1106,8 +1138,8 @@ void DtoDefineFunction(FuncDeclaration *fd, bool linkageAvailableExternally) {
// output function body
Statement_toIR(fd->fbody, gIR);
// D varargs: emit the cleanup block that calls va_end.
if (f->linkage == LINKd && f->varargs == 1) {
// Emit the cleanup blocks (e.g. va_end and function tracing)
if (!funcGen.scopes.empty()) {
if (!gIR->scopereturned()) {
if (!funcGen.retBlock)
funcGen.retBlock = gIR->insertBB("return");