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-rw-r--r--clang/lib/CodeGen/CGExpr.cpp30
-rw-r--r--clang/lib/CodeGen/CodeGenFunction.h3
-rw-r--r--clang/lib/Driver/SanitizerArgs.cpp31
-rw-r--r--clang/lib/Frontend/CompilerInvocation.cpp7
4 files changed, 50 insertions, 21 deletions
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 79955f5..d3fa5be 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -3546,7 +3546,7 @@ static void emitCheckHandlerCall(CodeGenFunction &CGF,
ArrayRef<llvm::Value *> FnArgs,
SanitizerHandler CheckHandler,
CheckRecoverableKind RecoverKind, bool IsFatal,
- llvm::BasicBlock *ContBB) {
+ llvm::BasicBlock *ContBB, bool NoMerge) {
assert(IsFatal || RecoverKind != CheckRecoverableKind::Unrecoverable);
std::optional<ApplyDebugLocation> DL;
if (!CGF.Builder.getCurrentDebugLocation()) {
@@ -3581,10 +3581,9 @@ static void emitCheckHandlerCall(CodeGenFunction &CGF,
llvm::AttributeList::FunctionIndex, B),
/*Local=*/true);
llvm::CallInst *HandlerCall = CGF.EmitNounwindRuntimeCall(Fn, FnArgs);
- bool NoMerge =
- ClSanitizeDebugDeoptimization ||
- !CGF.CGM.getCodeGenOpts().OptimizationLevel ||
- (CGF.CurCodeDecl && CGF.CurCodeDecl->hasAttr<OptimizeNoneAttr>());
+ NoMerge = NoMerge || ClSanitizeDebugDeoptimization ||
+ !CGF.CGM.getCodeGenOpts().OptimizationLevel ||
+ (CGF.CurCodeDecl && CGF.CurCodeDecl->hasAttr<OptimizeNoneAttr>());
if (NoMerge)
HandlerCall->addFnAttr(llvm::Attribute::NoMerge);
if (!MayReturn) {
@@ -3608,6 +3607,7 @@ void CodeGenFunction::EmitCheck(
llvm::Value *FatalCond = nullptr;
llvm::Value *RecoverableCond = nullptr;
llvm::Value *TrapCond = nullptr;
+ bool NoMerge = false;
for (int i = 0, n = Checked.size(); i < n; ++i) {
llvm::Value *Check = Checked[i].first;
// -fsanitize-trap= overrides -fsanitize-recover=.
@@ -3618,6 +3618,9 @@ void CodeGenFunction::EmitCheck(
? RecoverableCond
: FatalCond;
Cond = Cond ? Builder.CreateAnd(Cond, Check) : Check;
+
+ if (!CGM.getCodeGenOpts().SanitizeMergeHandlers.has(Checked[i].second))
+ NoMerge = true;
}
if (ClSanitizeGuardChecks) {
@@ -3632,7 +3635,7 @@ void CodeGenFunction::EmitCheck(
}
if (TrapCond)
- EmitTrapCheck(TrapCond, CheckHandler);
+ EmitTrapCheck(TrapCond, CheckHandler, NoMerge);
if (!FatalCond && !RecoverableCond)
return;
@@ -3698,7 +3701,7 @@ void CodeGenFunction::EmitCheck(
// Simple case: we need to generate a single handler call, either
// fatal, or non-fatal.
emitCheckHandlerCall(*this, FnType, Args, CheckHandler, RecoverKind,
- (FatalCond != nullptr), Cont);
+ (FatalCond != nullptr), Cont, NoMerge);
} else {
// Emit two handler calls: first one for set of unrecoverable checks,
// another one for recoverable.
@@ -3708,10 +3711,10 @@ void CodeGenFunction::EmitCheck(
Builder.CreateCondBr(FatalCond, NonFatalHandlerBB, FatalHandlerBB);
EmitBlock(FatalHandlerBB);
emitCheckHandlerCall(*this, FnType, Args, CheckHandler, RecoverKind, true,
- NonFatalHandlerBB);
+ NonFatalHandlerBB, NoMerge);
EmitBlock(NonFatalHandlerBB);
emitCheckHandlerCall(*this, FnType, Args, CheckHandler, RecoverKind, false,
- Cont);
+ Cont, NoMerge);
}
EmitBlock(Cont);
@@ -3901,7 +3904,8 @@ void CodeGenFunction::EmitUnreachable(SourceLocation Loc) {
}
void CodeGenFunction::EmitTrapCheck(llvm::Value *Checked,
- SanitizerHandler CheckHandlerID) {
+ SanitizerHandler CheckHandlerID,
+ bool NoMerge) {
llvm::BasicBlock *Cont = createBasicBlock("cont");
// If we're optimizing, collapse all calls to trap down to just one per
@@ -3911,9 +3915,9 @@ void CodeGenFunction::EmitTrapCheck(llvm::Value *Checked,
llvm::BasicBlock *&TrapBB = TrapBBs[CheckHandlerID];
- bool NoMerge = ClSanitizeDebugDeoptimization ||
- !CGM.getCodeGenOpts().OptimizationLevel ||
- (CurCodeDecl && CurCodeDecl->hasAttr<OptimizeNoneAttr>());
+ NoMerge = NoMerge || ClSanitizeDebugDeoptimization ||
+ !CGM.getCodeGenOpts().OptimizationLevel ||
+ (CurCodeDecl && CurCodeDecl->hasAttr<OptimizeNoneAttr>());
if (TrapBB && !NoMerge) {
auto Call = TrapBB->begin();
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 847999c..4d41391 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -5171,7 +5171,8 @@ public:
/// Create a basic block that will call the trap intrinsic, and emit a
/// conditional branch to it, for the -ftrapv checks.
- void EmitTrapCheck(llvm::Value *Checked, SanitizerHandler CheckHandlerID);
+ void EmitTrapCheck(llvm::Value *Checked, SanitizerHandler CheckHandlerID,
+ bool NoMerge = false);
/// Emit a call to trap or debugtrap and attach function attribute
/// "trap-func-name" if specified.
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 81f94f2..595bfb4 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -68,6 +68,7 @@ static const SanitizerMask TrappingSupported =
SanitizerKind::ImplicitConversion | SanitizerKind::Nullability |
SanitizerKind::LocalBounds | SanitizerKind::CFI |
SanitizerKind::FloatDivideByZero | SanitizerKind::ObjCCast;
+static const SanitizerMask MergeDefault = SanitizerKind::Undefined;
static const SanitizerMask TrappingDefault = SanitizerKind::CFI;
static const SanitizerMask CFIClasses =
SanitizerKind::CFIVCall | SanitizerKind::CFINVCall |
@@ -696,6 +697,13 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
TrappingKinds &= Kinds;
RecoverableKinds &= ~TrappingKinds;
+ // Parse -f(no-)?sanitize-nonmerged-handlers flags
+ SanitizerMask MergeKinds =
+ parseSanitizeArgs(D, Args, DiagnoseErrors, MergeDefault, {}, {},
+ options::OPT_fsanitize_merge_handlers_EQ,
+ options::OPT_fno_sanitize_merge_handlers_EQ);
+ MergeKinds &= Kinds;
+
// Setup ignorelist files.
// Add default ignorelist from resource directory for activated sanitizers,
// and validate special case lists format.
@@ -1113,6 +1121,8 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
TrapSanitizers.Mask |= TrappingKinds;
assert(!(RecoverableKinds & TrappingKinds) &&
"Overlap between recoverable and trapping sanitizers");
+
+ MergeHandlers.Mask |= MergeKinds;
}
static std::string toString(const clang::SanitizerSet &Sanitizers) {
@@ -1274,6 +1284,10 @@ void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
CmdArgs.push_back(
Args.MakeArgString("-fsanitize-trap=" + toString(TrapSanitizers)));
+ if (!MergeHandlers.empty())
+ CmdArgs.push_back(
+ Args.MakeArgString("-fsanitize-merge=" + toString(MergeHandlers)));
+
addSpecialCaseListOpt(Args, CmdArgs,
"-fsanitize-ignorelist=", UserIgnorelistFiles);
addSpecialCaseListOpt(Args, CmdArgs,
@@ -1441,13 +1455,16 @@ void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
bool DiagnoseErrors) {
- assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
- A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
- A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
- A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
- A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
- A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
- "Invalid argument in parseArgValues!");
+ assert(
+ (A->getOption().matches(options::OPT_fsanitize_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_trap_EQ) ||
+ A->getOption().matches(options::OPT_fsanitize_merge_handlers_EQ) ||
+ A->getOption().matches(options::OPT_fno_sanitize_merge_handlers_EQ)) &&
+ "Invalid argument in parseArgValues!");
SanitizerMask Kinds;
for (int i = 0, n = A->getNumValues(); i != n; ++i) {
const char *Value = A->getValue(i);
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 298fafc..348c56c 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1792,6 +1792,10 @@ void CompilerInvocationBase::GenerateCodeGenArgs(const CodeGenOptions &Opts,
for (StringRef Sanitizer : serializeSanitizerKinds(Opts.SanitizeTrap))
GenerateArg(Consumer, OPT_fsanitize_trap_EQ, Sanitizer);
+ for (StringRef Sanitizer :
+ serializeSanitizerKinds(Opts.SanitizeMergeHandlers))
+ GenerateArg(Consumer, OPT_fsanitize_merge_handlers_EQ, Sanitizer);
+
if (!Opts.EmitVersionIdentMetadata)
GenerateArg(Consumer, OPT_Qn);
@@ -2269,6 +2273,9 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
parseSanitizerKinds("-fsanitize-trap=",
Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
Opts.SanitizeTrap);
+ parseSanitizerKinds("-fsanitize-merge=",
+ Args.getAllArgValues(OPT_fsanitize_merge_handlers_EQ),
+ Diags, Opts.SanitizeMergeHandlers);
Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
generated by cgit v1.1 at 2025-08-03 03:34:25 +0000