diff options
| author | Fangrui Song <maskray@google.com> | 2020-01-04 15:39:19 -0800 |
|---|---|---|
| committer | Fangrui Song <maskray@google.com> | 2020-01-10 09:57:34 -0800 |
| commit | a44c434b68e515ce9f2627367c83ff6b22328261 (patch) | |
| tree | d568652ab8ec6c31af18a56b7925f053b0c41ff8 /clang/lib/CodeGen/CodeGenFunction.cpp | |
| parent | a8fbdc576990653e92ce1d766659005678fd8514 (diff) | |
| download | llvm-a44c434b68e515ce9f2627367c83ff6b22328261.zip llvm-a44c434b68e515ce9f2627367c83ff6b22328261.tar.gz llvm-a44c434b68e515ce9f2627367c83ff6b22328261.tar.bz2 | |
Support function attribute patchable_function_entry
This feature is generic. Make it applicable for AArch64 and X86 because
the backend has only implemented NOP insertion for AArch64 and X86.
Reviewed By: nickdesaulniers, aaron.ballman
Differential Revision: https://reviews.llvm.org/D72221
Diffstat (limited to 'clang/lib/CodeGen/CodeGenFunction.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CodeGenFunction.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp index a717f43e..e59fe06 100644 --- a/clang/lib/CodeGen/CodeGenFunction.cpp +++ b/clang/lib/CodeGen/CodeGenFunction.cpp @@ -799,8 +799,8 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy, FD->getBody()->getStmtClass() == Stmt::CoroutineBodyStmtClass) SanOpts.Mask &= ~SanitizerKind::Null; - // Apply xray attributes to the function (as a string, for now) if (D) { + // Apply xray attributes to the function (as a string, for now) if (const auto *XRayAttr = D->getAttr<XRayInstrumentAttr>()) { if (CGM.getCodeGenOpts().XRayInstrumentationBundle.has( XRayInstrKind::Function)) { @@ -819,6 +819,12 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy, "xray-instruction-threshold", llvm::itostr(CGM.getCodeGenOpts().XRayInstructionThreshold)); } + + if (const auto *Attr = D->getAttr<PatchableFunctionEntryAttr>()) { + // Attr->getStart is currently ignored. + Fn->addFnAttr("patchable-function-entry", + std::to_string(Attr->getCount())); + } } // Add no-jump-tables value. |