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Add basic clang-like support for XRay, through -fxray-instrument and -fxray-instruction-threshold=. (#2465)

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Currently only fully working on Linux.
See https://llvm.org/docs/XRay.html
This commit is contained in:
Johan Engelen 2018-01-23 22:06:05 +01:00 • committed by GitHub
parent 43c02cecc0
commit 1da088330d
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10 changed files with 148 additions and 0 deletions
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14
gen/functions.cpp
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@ -19,6 +19,7 @@
#include "statement.h"
#include "template.h"
#include "driver/cl_options.h"
#include "driver/cl_options_instrumentation.h"
#include "driver/cl_options_sanitizers.h"
#include "gen/abi.h"
#include "gen/arrays.h"
@ -463,6 +464,18 @@ void applyTargetMachineAttributes(llvm::Function &func,
willEliminateFramePointer() ? "false" : "true");
}
void applyXRayAttributes(FuncDeclaration &fdecl, llvm::Function &func) {
if (!opts::fXRayInstrument)
return;
if (!fdecl.emitInstrumentation) {
func.addFnAttr("function-instrument", "xray-never");
} else {
func.addFnAttr("xray-instruction-threshold",
opts::getXRayInstructionThresholdString());
}
}
} // anonymous namespace
////////////////////////////////////////////////////////////////////////////////
@ -1010,6 +1023,7 @@ void DtoDefineFunction(FuncDeclaration *fd, bool linkageAvailableExternally) {
func->addFnAttr(LLAttribute::SanitizeThread);
}
}
applyXRayAttributes(*fd, *func);
llvm::BasicBlock *beginbb =
llvm::BasicBlock::Create(gIR->context(), "", func);