[ARM] Enable cfi-icall for thumb triples #102126
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Support for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple. This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program.
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@llvm/pr-subscribers-clang @llvm/pr-subscribers-clang-driver Author: Oliver Stannard (ostannard) ChangesSupport for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple. This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program. Full diff: https://github.com/llvm/llvm-project/pull/102126.diff 2 Files Affected:
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 20a555afb8092..2d50c2cbbc881 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -1381,7 +1381,8 @@ SanitizerMask ToolChain::getSupportedSanitizers() const {
SanitizerKind::Nullability | SanitizerKind::LocalBounds;
if (getTriple().getArch() == llvm::Triple::x86 ||
getTriple().getArch() == llvm::Triple::x86_64 ||
- getTriple().getArch() == llvm::Triple::arm || getTriple().isWasm() ||
+ getTriple().getArch() == llvm::Triple::arm ||
+ getTriple().getArch() == llvm::Triple::thumb || getTriple().isWasm() ||
getTriple().isAArch64() || getTriple().isRISCV() ||
getTriple().isLoongArch64())
Res |= SanitizerKind::CFIICall;
diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index db14f6e195c64..678fa432fb0a0 100644
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -611,6 +611,8 @@
// RUN: %clang --target=arm-linux-gnu -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
// RUN: %clang --target=aarch64-linux-gnu -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
// RUN: %clang --target=arm-linux-android -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
+// RUN: %clang --target=arm-none-eabi -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
+// RUN: %clang --target=thumb-none-eabi -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
// RUN: %clang --target=aarch64-linux-android -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
// RUN: %clang --target=aarch64_be -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
// RUN: %clang --target=riscv32 -fvisibility=hidden -fsanitize=cfi -flto -resource-dir=%S/Inputs/resource_dir -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI
|
statham-arm
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Aug 6, 2024
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Aug 7, 2024
Support for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple. This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program.
TIFitis
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Aug 8, 2024
Support for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple. This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program.
kstoimenov
pushed a commit
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Aug 15, 2024
Support for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple. This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program.
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Support for this was added back in 2016 (https://reviews.llvm.org/D27499), but never enabled in the driver. Since then, it's been possible to enable this with an arm triple and the -mthumb option, but not with a thumb triple.
This also caused -fsanitise=cfi to enable cfi-icall for arm triple but not thumb triples, which caused spurious sanitiser failures if mixing the two ISAs in one program.