https://github.com/Il-Capitano created
https://github.com/llvm/llvm-project/pull/118816
The current error message when using the `-fsanitize=function -mexecute-only`
flags together points to the target triple as the reason that
`-fsanitize=function` is not allowed to be used, even when the function
sanitizer is otherwise supported on the target when not using `-mexecute-only`.
The error message is improved to give `-mexecute-only` as the reason for
disallowing `-fsanitize=function` if it was passed to the driver.
From 691a26b6602a4f7c9f2ea5eaf27bb8d1a0be11a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Csan=C3=A1d=20Hajd=C3=BA?= <csanad.ha...@arm.com>
Date: Thu, 5 Dec 2024 14:46:08 +0100
Subject: [PATCH] [Clang] Improve error for `-fsanitize=function/kcfi
-mexecute-only` incompatibility
The current error message when using the `-fsanitize=function -mexecute-only`
flags together points to the target triple as the reason that
`-fsanitize=function` is not allowed to be used, even when the function
sanitizer is otherwise supported on the target when not using
`-mexecute-only`.
The error message is improved to give `-mexecute-only` as the reason for
disallowing `-fsanitize=function` if it was passed to the driver.
---
clang/lib/Driver/SanitizerArgs.cpp | 10 ++++++++--
clang/test/Driver/fsanitize.c | 4 ++--
2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/clang/lib/Driver/SanitizerArgs.cpp
b/clang/lib/Driver/SanitizerArgs.cpp
index 1abfe8fd92807e..6d87e25b49237e 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -418,8 +418,14 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
Add & NotAllowedWithExecuteOnly & ~DiagnosedKinds) {
if (DiagnoseErrors) {
std::string Desc = describeSanitizeArg(Arg, KindsToDiagnose);
- D.Diag(diag::err_drv_argument_not_allowed_with)
- << Desc << Triple.str();
+ llvm::opt::Arg *A = Args.getLastArgNoClaim(
+ options::OPT_mexecute_only, options::OPT_mno_execute_only);
+ if (A && A->getOption().matches(options::OPT_mexecute_only))
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << Desc << A->getAsString(Args);
+ else
+ D.Diag(diag::err_drv_argument_not_allowed_with)
+ << Desc << Triple.str();
}
DiagnosedKinds |= KindsToDiagnose;
}
diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index 15f190165a7d73..a99bfb3e82ac95 100644
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -1000,8 +1000,8 @@
// RUN: not %clang --target=armv6t2-eabi -mexecute-only -fsanitize=kcfi %s
-### 2>&1 | FileCheck %s --check-prefix=CHECK-UBSAN-KCFI
// RUN: %clang --target=armv6t2-eabi -mexecute-only -fsanitize=undefined %s
-### 2>&1 | FileCheck %s --check-prefix=CHECK-UBSAN-UNDEFINED-VPTR
-// CHECK-UBSAN-KCFI-DAG: error: invalid argument '-fsanitize=kcfi' not allowed
with {{('x86_64-sie-ps5'|'armv6t2-unknown-unknown-eabi')}}
-// CHECK-UBSAN-FUNCTION-DAG: error: invalid argument '-fsanitize=function' not
allowed with {{('x86_64-sie-ps5'|'armv6t2-unknown-unknown-eabi')}}
+// CHECK-UBSAN-KCFI-DAG: error: invalid argument '-fsanitize=kcfi' not allowed
with {{('x86_64-sie-ps5'|'-mexecute-only')}}
+// CHECK-UBSAN-FUNCTION-DAG: error: invalid argument '-fsanitize=function' not
allowed with {{('x86_64-sie-ps5'|'-mexecute-only')}}
// CHECK-UBSAN-UNDEFINED-VPTR:
"-fsanitize={{((alignment|array-bounds|bool|builtin|enum|float-cast-overflow|integer-divide-by-zero|nonnull-attribute|null|pointer-overflow|return|returns-nonnull-attribute|shift-base|shift-exponent|signed-integer-overflow|unreachable|vla-bound|vptr),?){18}"}}
// * Test BareMetal toolchain sanitizer support *
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