phosek updated this revision to Diff 213170.
phosek edited the summary of this revision.
phosek added a comment.
Herald added a subscriber: cryptoad.
I've updated the change and renamed the flag to `-fsanitize-no-runtime`
although I'm not sure if it's necessarily better. I was thinking that ideal
interface might be `-fsanitize-runtime=(none|minimal|shared|static)` which
could also replace `-fshared-libsan` and `-fstatic-libsan`, but it'd be a
breaking change so we might have to keep the existing flag and maybe print a
deprecation warning. WDYT?
Repository:
rC Clang
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D65029/new/
https://reviews.llvm.org/D65029
Files:
clang/include/clang/Driver/Options.td
clang/include/clang/Driver/SanitizerArgs.h
clang/lib/Driver/SanitizerArgs.cpp
clang/test/Driver/sanitizer-ld.c
Index: clang/test/Driver/sanitizer-ld.c
===================================================================
--- clang/test/Driver/sanitizer-ld.c
+++ clang/test/Driver/sanitizer-ld.c
@@ -28,6 +28,14 @@
// RUN: --sysroot=%S/Inputs/basic_linux_tree \
// RUN: | FileCheck --check-prefix=CHECK-SHARED-ASAN-LINUX %s
+// RUN: %clang -fsanitize=address -fsanitize-no-runtime %s -### -o %t.o 2>&1 \
+// RUN: -target x86_64-unknown-linux -fuse-ld=ld \
+// RUN: -resource-dir=%S/Inputs/resource_dir \
+// RUN: --sysroot=%S/Inputs/basic_linux_tree \
+// RUN: | FileCheck --check-prefix=CHECK-ASAN-NO-RUNTIME-LINUX %s
+//
+// CHECK-ASAN-NO-RUNTIME-LINUX-NOT: libclang_rt.asan-x86_64.a"
+
// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
// RUN: -target i386-unknown-linux -fuse-ld=ld -fsanitize=address \
// RUN: -shared-libsan -static-libsan -shared-libasan \
Index: clang/lib/Driver/SanitizerArgs.cpp
===================================================================
--- clang/lib/Driver/SanitizerArgs.cpp
+++ clang/lib/Driver/SanitizerArgs.cpp
@@ -208,7 +208,7 @@
// All of these include ubsan.
if (needsAsanRt() || needsMsanRt() || needsHwasanRt() || needsTsanRt() ||
needsDfsanRt() || needsLsanRt() || needsCfiDiagRt() ||
- (needsScudoRt() && !requiresMinimalRuntime()))
+ (needsScudoRt() && !requiresMinimalRuntime()) || RT == SRT_None)
return false;
return (Sanitizers.Mask & NeedsUbsanRt & ~TrapSanitizers.Mask) ||
@@ -217,12 +217,12 @@
bool SanitizerArgs::needsCfiRt() const {
return !(Sanitizers.Mask & SanitizerKind::CFI & ~TrapSanitizers.Mask) &&
- CfiCrossDso && !ImplicitCfiRuntime;
+ CfiCrossDso && !ImplicitCfiRuntime && RT != SRT_None;
}
bool SanitizerArgs::needsCfiDiagRt() const {
return (Sanitizers.Mask & SanitizerKind::CFI & ~TrapSanitizers.Mask) &&
- CfiCrossDso && !ImplicitCfiRuntime;
+ CfiCrossDso && !ImplicitCfiRuntime && RT != SRT_None;
}
bool SanitizerArgs::requiresPIE() const {
@@ -261,9 +261,21 @@
SanitizerMask TrappingKinds = parseSanitizeTrapArgs(D, Args);
SanitizerMask InvalidTrappingKinds = TrappingKinds & NotAllowedWithTrap;
- MinimalRuntime =
- Args.hasFlag(options::OPT_fsanitize_minimal_runtime,
- options::OPT_fno_sanitize_minimal_runtime, MinimalRuntime);
+ auto *RuntimeArg = Args.getLastArg(
+ options::OPT_fsanitize_no_runtime, options::OPT_fno_sanitize_no_runtime,
+ options::OPT_fsanitize_minimal_runtime, options::OPT_fno_sanitize_minimal_runtime);
+
+ if (RuntimeArg) {
+ Option O = RuntimeArg->getOption();
+ if (O.matches(options::OPT_fsanitize_no_runtime))
+ RT = SRT_None;
+ if (O.matches(options::OPT_fno_sanitize_no_runtime))
+ RT = SRT_Regular;
+ if (O.matches(options::OPT_fsanitize_minimal_runtime))
+ RT = SRT_Minimal;
+ if (O.matches(options::OPT_fno_sanitize_minimal_runtime))
+ RT = SRT_Regular;
+ }
// The object size sanitizer should not be enabled at -O0.
Arg *OptLevel = Args.getLastArg(options::OPT_O_Group);
@@ -303,7 +315,7 @@
}
Add &= ~InvalidTrappingKinds;
- if (MinimalRuntime) {
+ if (requiresMinimalRuntime()) {
if (SanitizerMask KindsToDiagnose =
Add & NotAllowedWithMinimalRuntime & ~DiagnosedKinds) {
std::string Desc = describeSanitizeArg(*I, KindsToDiagnose);
@@ -367,7 +379,7 @@
// Silently discard any unsupported sanitizers implicitly enabled through
// group expansion.
Add &= ~InvalidTrappingKinds;
- if (MinimalRuntime) {
+ if (requiresMinimalRuntime()) {
Add &= ~NotAllowedWithMinimalRuntime;
}
if (CfiCrossDso)
@@ -640,7 +652,7 @@
Stats = Args.hasFlag(options::OPT_fsanitize_stats,
options::OPT_fno_sanitize_stats, false);
- if (MinimalRuntime) {
+ if (requiresMinimalRuntime()) {
SanitizerMask IncompatibleMask =
Kinds & ~setGroupBits(CompatibleWithMinimalRuntime);
if (IncompatibleMask)
@@ -972,7 +984,9 @@
if (Stats)
CmdArgs.push_back("-fsanitize-stats");
- if (MinimalRuntime)
+ if (RT == SRT_None)
+ CmdArgs.push_back("-fsanitize-no-runtime");
+ else if (RT == SRT_Minimal)
CmdArgs.push_back("-fsanitize-minimal-runtime");
if (AsanFieldPadding)
Index: clang/include/clang/Driver/SanitizerArgs.h
===================================================================
--- clang/include/clang/Driver/SanitizerArgs.h
+++ clang/include/clang/Driver/SanitizerArgs.h
@@ -21,6 +21,17 @@
class ToolChain;
class SanitizerArgs {
+ enum SanitizerRuntimeKind {
+ /// Don't use any sanitizer runtime.
+ SRT_None,
+
+ /// Use minimal sanitizer runtime.
+ SRT_Minimal,
+
+ /// Regular sanitizer runtime.
+ SRT_Regular,
+ };
+
SanitizerSet Sanitizers;
SanitizerSet RecoverableSanitizers;
SanitizerSet TrapSanitizers;
@@ -48,7 +59,7 @@
bool TsanMemoryAccess = true;
bool TsanFuncEntryExit = true;
bool TsanAtomics = true;
- bool MinimalRuntime = false;
+ SanitizerRuntimeKind RT = SRT_Regular;
// True if cross-dso CFI support if provided by the system (i.e. Android).
bool ImplicitCfiRuntime = false;
@@ -58,24 +69,39 @@
bool needsSharedRt() const { return SharedRuntime; }
- bool needsAsanRt() const { return Sanitizers.has(SanitizerKind::Address); }
- bool needsHwasanRt() const { return Sanitizers.has(SanitizerKind::HWAddress); }
- bool needsTsanRt() const { return Sanitizers.has(SanitizerKind::Thread); }
- bool needsMsanRt() const { return Sanitizers.has(SanitizerKind::Memory); }
- bool needsFuzzer() const { return Sanitizers.has(SanitizerKind::Fuzzer); }
+ bool needsAsanRt() const {
+ return Sanitizers.has(SanitizerKind::Address) && RT != SRT_None;
+ }
+ bool needsHwasanRt() const {
+ return Sanitizers.has(SanitizerKind::HWAddress) && RT != SRT_None;
+ }
+ bool needsTsanRt() const {
+ return Sanitizers.has(SanitizerKind::Thread) && RT != SRT_None;
+ }
+ bool needsMsanRt() const {
+ return Sanitizers.has(SanitizerKind::Memory) && RT != SRT_None;
+ }
+ bool needsFuzzer() const {
+ return Sanitizers.has(SanitizerKind::Fuzzer) && RT != SRT_None;
+ }
bool needsLsanRt() const {
return Sanitizers.has(SanitizerKind::Leak) &&
!Sanitizers.has(SanitizerKind::Address) &&
- !Sanitizers.has(SanitizerKind::HWAddress);
+ !Sanitizers.has(SanitizerKind::HWAddress) && RT != SRT_None;
}
bool needsUbsanRt() const;
- bool requiresMinimalRuntime() const { return MinimalRuntime; }
- bool needsDfsanRt() const { return Sanitizers.has(SanitizerKind::DataFlow); }
- bool needsSafeStackRt() const { return SafeStackRuntime; }
+ bool requiresRuntime() const { return RT != SRT_None; }
+ bool requiresMinimalRuntime() const { return RT == SRT_Minimal; }
+ bool needsDfsanRt() const {
+ return Sanitizers.has(SanitizerKind::DataFlow) && RT != SRT_None;
+ }
+ bool needsSafeStackRt() const { return SafeStackRuntime && RT != SRT_None; }
bool needsCfiRt() const;
bool needsCfiDiagRt() const;
- bool needsStatsRt() const { return Stats; }
- bool needsScudoRt() const { return Sanitizers.has(SanitizerKind::Scudo); }
+ bool needsStatsRt() const { return Stats && RT != SRT_None; }
+ bool needsScudoRt() const {
+ return Sanitizers.has(SanitizerKind::Scudo) && RT != SRT_None;
+ }
bool requiresPIE() const;
bool needsUnwindTables() const;
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -1043,6 +1043,10 @@
Group<f_clang_Group>;
def fno_sanitize_minimal_runtime : Flag<["-"], "fno-sanitize-minimal-runtime">,
Group<f_clang_Group>;
+def fsanitize_no_runtime : Flag<["-"], "fsanitize-no-runtime">,
+ Group<f_clang_Group>;
+def fno_sanitize_no_runtime : Flag<["-"], "fno-sanitize-no-runtime">,
+ Group<f_clang_Group>;
def fsanitize_link_cxx_runtime : Flag<["-"], "fsanitize-link-c++-runtime">,
Group<f_clang_Group>;
def fsanitize_cfi_cross_dso : Flag<["-"], "fsanitize-cfi-cross-dso">,
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