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Driver: only produce CFI -fvisibility= error when compiling. 

The -fvisibility= flag only affects compile jobs, so there's no need to
error out because of it if we aren't compiling (e.g. if we are only linking).

llvm-svn: 267824
This commit is contained in:
Peter Collingbourne 2016-04-28 00:18:30 +00:00
parent 893110ecaf
commit f10237b689
2 changed files with 14 additions and 10 deletions
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18
clang/lib/Driver/SanitizerArgs.cpp
View File

@ -561,14 +561,6 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
LinkCXXRuntimes =
Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
// Require -fvisibility= flag on non-Windows if vptr CFI is enabled.
if ((Kinds & CFIClasses) && !TC.getTriple().isOSWindows() &&
!Args.hasArg(options::OPT_fvisibility_EQ)) {
D.Diag(clang::diag::err_drv_argument_only_allowed_with)
<< lastArgumentForMask(D, Args, Kinds & CFIClasses)
<< "-fvisibility=";
}
// Finally, initialize the set of available and recoverable sanitizers.
Sanitizers.Mask |= Kinds;
RecoverableSanitizers.Mask |= RecoverableKinds;
@ -690,6 +682,16 @@ void SanitizerArgs::addArgs(const ToolChain &TC, const llvm::opt::ArgList &Args,
TC.getCompilerRT(Args, "stats")));
addIncludeLinkerOption(TC, Args, CmdArgs, "__sanitizer_stats_register");
}
// Require -fvisibility= flag on non-Windows when compiling if vptr CFI is
// enabled.
if (Sanitizers.hasOneOf(CFIClasses) && !TC.getTriple().isOSWindows() &&
!Args.hasArg(options::OPT_fvisibility_EQ)) {
TC.getDriver().Diag(clang::diag::err_drv_argument_only_allowed_with)
<< lastArgumentForMask(TC.getDriver(), Args,
Sanitizers.Mask & CFIClasses)
<< "-fvisibility=";
}
}
SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,

6
clang/test/Driver/fsanitize.c
View File

@ -309,8 +309,10 @@
// RUN: %clang -target x86_64-linux-gnu -flto -fsanitize=cfi-derived-cast -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOVIS
// CHECK-CFI-NOVIS: '-fsanitize=cfi-derived-cast' only allowed with '-fvisibility='
// RUN: %clang -target x86_64-pc-win32 -flto -fsanitize=cfi-derived-cast -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOVIS-WIN
// CHECK-CFI-NOVIS-WIN-NOT: only allowed with
// RUN: %clang -target x86_64-pc-win32 -flto -fsanitize=cfi-derived-cast -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOVIS-NOERROR
// RUN: echo > %t.o
// RUN: %clang -target x86_64-linux-gnu -flto -fsanitize=cfi-derived-cast %t.o -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOVIS-NOERROR
// CHECK-CFI-NOVIS-NOERROR-NOT: only allowed with
// RUN: %clang -target mips-unknown-linux -fsanitize=cfi-icall %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-ICALL-MIPS
// CHECK-CFI-ICALL-MIPS: unsupported option '-fsanitize=cfi-icall' for target 'mips-unknown-linux'