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[UBSan][Ignorelist] Expanding =sanitize to fun. (#142074)

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See https://github.com/llvm/llvm-project/issues/139128
If multiple entries match the source, than the latest entry takes the
precedence.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Qinkun Bao 2025-06-02 17:08:04 -04:00 committed by GitHub
parent 09cd3edc9a
commit d313c09b28
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2 changed files with 84 additions and 1 deletions
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2
clang/lib/Basic/NoSanitizeList.cpp
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@ -54,7 +54,7 @@ bool NoSanitizeList::containsType(SanitizerMask Mask, StringRef MangledTypeName,
bool NoSanitizeList::containsFunction(SanitizerMask Mask,
StringRef FunctionName) const {
return SSCL->inSection(Mask, "fun", FunctionName);
return containsPrefix(Mask, "fun", FunctionName, {});
}
bool NoSanitizeList::containsFile(SanitizerMask Mask, StringRef FileName,

83
clang/test/CodeGen/ubsan-function-ignorelist.test Normal file
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@ -0,0 +1,83 @@
// RUN: rm -rf %t
// RUN: split-file %s %t
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-0.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,SANITIZE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-1.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,IGNORE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-2.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,SANITIZE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-3.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,IGNORE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-4.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,SANITIZE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-5.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,IGNORE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-6.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,SANITIZE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-7.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,IGNORE
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=signed-integer-overflow,unsigned-integer-overflow -fsanitize-ignorelist=%t/order-8.ignorelist -emit-llvm %t/test.c -o - | FileCheck %s --check-prefixes=CHECK,SANITIZE
// The same type can appear multiple times within an ignorelist. Any ``=sanitize`` type
// entries enable sanitizer instrumentation, even if it was ignored by entries before.
// If multiple entries match the source, then the latest entry takes the
// precedence.
//--- order-0.ignorelist
fun:add
fun:add=sanitize
//--- order-1.ignorelist
fun:add=sanitize
fun:add
//--- order-2.ignorelist
fun:ad*
fun:add=sanitize
//--- order-3.ignorelist
fun:ad*=sanitize
fun:add
//--- order-4.ignorelist
fun:add
fun:ad*=sanitize
//--- order-5.ignorelist
fun:add=sanitize
fun:ad*
//--- order-6.ignorelist
fun:add
fun:add=sanitize
fun:a*d
fun:*dd=sanitize
//--- order-7.ignorelist
[{unsigned-integer-overflow,signed-integer-overflow}]
fun:*
fun:add=sanitize
fun:a*d
fun:*dd=sanitize
[{unsigned-integer-overflow,signed-integer-overflow}]
fun:*
fun:add
fun:a*d=sanitize
fun:*d
//--- order-8.ignorelist
[{unsigned-integer-overflow,signed-integer-overflow}]
fun:*
fun:add
fun:a*d=sanitize
fun:*dd
[{unsigned-integer-overflow,signed-integer-overflow}]
fun:*
fun:add=sanitize
fun:a*d
fun:*dd=sanitize
//--- test.c
// CHECK-LABEL: define dso_local void @add
void add(int A) {
// IGNORE: %inc = add nsw
// SANITIZE: @llvm.sadd.with.overflow.i32
++A;
}