[Sanitizers] Provide better diagnostic for sanitizers unsupported for target triple.
Introduce ToolChain::getSupportedSanitizers() that would return the set
of sanitizers available on given toolchain. By default, these are
sanitizers which don't necessarily require runtime support and are
not toolchain- or architecture-dependent.
Sanitizers (ASan, DFSan, TSan, MSan etc.) which cannot function
without runtime library are marked as supported only on platforms
for which we actually build these runtimes.
This would allow more fine-grained checks in the future: for instance,
we have to restrict availability of -fsanitize=vptr to Mac OS 10.9+
(PR23539).
Update test cases accrodingly: add tests for certain unsupported
configurations, remove test cases for -fsanitize=vptr + PS4
integration, as we don't build the runtime for PS4 at the moment.
This change was first submitted as r239953 and reverted in r239958.
The problem was and still is in Darwin toolchains, which get the
knowledge about target platform too late after initializaition, while
now we require this information when ToolChain::getSanitizerArgs() is
called. r240170 works around this issue.
llvm-svn: 240179
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 7303523..987e063 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -379,26 +379,10 @@
const SanitizerArgs &Sanitize = getSanitizerArgs();
-
- if (Sanitize.needsAsanRt()) {
- if (!isTargetMacOS() && !isTargetIOSSimulator()) {
- // FIXME: Move this check to SanitizerArgs::filterUnsupportedKinds.
- getDriver().Diag(diag::err_drv_clang_unsupported_per_platform)
- << "-fsanitize=address";
- } else {
- AddLinkSanitizerLibArgs(Args, CmdArgs, "asan");
- }
- }
-
- if (Sanitize.needsUbsanRt()) {
- if (!isTargetMacOS() && !isTargetIOSSimulator()) {
- // FIXME: Move this check to SanitizerArgs::filterUnsupportedKinds.
- getDriver().Diag(diag::err_drv_clang_unsupported_per_platform)
- << "-fsanitize=undefined";
- } else {
- AddLinkSanitizerLibArgs(Args, CmdArgs, "ubsan");
- }
- }
+ if (Sanitize.needsAsanRt())
+ AddLinkSanitizerLibArgs(Args, CmdArgs, "asan");
+ if (Sanitize.needsUbsanRt())
+ AddLinkSanitizerLibArgs(Args, CmdArgs, "ubsan");
// Otherwise link libSystem, then the dynamic runtime library, and finally any
// target specific static runtime library.
@@ -1084,6 +1068,18 @@
getDriver().Diag(diag::err_arc_unsupported_on_toolchain);
}
+SanitizerMask Darwin::getSupportedSanitizers() const {
+ SanitizerMask Res = ToolChain::getSupportedSanitizers();
+ if (isTargetMacOS() || isTargetIOSSimulator()) {
+ // ASan and UBSan are available on Mac OS and on iOS simulator.
+ Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::Vptr;
+ }
+ if (isTargetMacOS())
+ Res |= SanitizerKind::SafeStack;
+ return Res;
+}
+
/// Generic_GCC - A tool chain using the 'gcc' command to perform
/// all subcommands; this relies on gcc translating the majority of
/// command line options.
@@ -2724,6 +2720,24 @@
return getSanitizerArgs().requiresPIE();
}
+SanitizerMask FreeBSD::getSupportedSanitizers() const {
+ const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
+ const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
+ const bool IsMIPS64 = getTriple().getArch() == llvm::Triple::mips64 ||
+ getTriple().getArch() == llvm::Triple::mips64el;
+ SanitizerMask Res = ToolChain::getSupportedSanitizers();
+ Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::Vptr;
+ if (IsX86_64 || IsMIPS64) {
+ Res |= SanitizerKind::Leak;
+ Res |= SanitizerKind::Thread;
+ }
+ if (IsX86 || IsX86_64) {
+ Res |= SanitizerKind::SafeStack;
+ }
+ return Res;
+}
+
/// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
NetBSD::NetBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args)
@@ -3628,6 +3642,28 @@
return getSanitizerArgs().requiresPIE();
}
+SanitizerMask Linux::getSupportedSanitizers() const {
+ const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
+ const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
+ const bool IsMIPS64 = getTriple().getArch() == llvm::Triple::mips64 ||
+ getTriple().getArch() == llvm::Triple::mips64el;
+ SanitizerMask Res = ToolChain::getSupportedSanitizers();
+ Res |= SanitizerKind::Address;
+ Res |= SanitizerKind::KernelAddress;
+ Res |= SanitizerKind::Vptr;
+ if (IsX86_64 || IsMIPS64) {
+ Res |= SanitizerKind::DataFlow;
+ Res |= SanitizerKind::Leak;
+ Res |= SanitizerKind::Memory;
+ Res |= SanitizerKind::Thread;
+ }
+ if (IsX86 || IsX86_64) {
+ Res |= SanitizerKind::Function;
+ Res |= SanitizerKind::SafeStack;
+ }
+ return Res;
+}
+
/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
DragonFly::DragonFly(const Driver &D, const llvm::Triple& Triple, const ArgList &Args)