[UBSan] [compiler-rt] add preservecc variants of handlers #168643
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llvmbot added compiler-rt compiler-rt:ubsan 
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| @llvm/pr-subscribers-compiler-rt-sanitizer Author: Florian Mayer (fmayer) ChangesFull diff: https://github.com/llvm/llvm-project/pull/168643.diff 2 Files Affected:
diff --git a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp index a2a2e36e8523d..0a2d6f35a539a 100644 --- a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp +++ b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp @@ -89,6 +89,17 @@ SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error, const char *kind, } } +SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error_preserve, + const char *kind, uintptr_t caller, + const uintptr_t *address) +[[clang::preserve_all]] { + // Additional indirecton so the user can override this with their own + // preserve_all function. This would allow, e.g., a function that reports the + // first error only, so for all subsequent calls we can skip the register save + // / restore. + __ubsan_report_error(kind, caller, address); +} + SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error_fatal, const char *kind, uintptr_t caller, const uintptr_t *address) { // Use another handlers, in case it's already overriden. @@ -130,6 +141,10 @@ void NORETURN CheckFailed(const char *file, int, const char *cond, u64, u64) { #define HANDLER_RECOVER(name, kind) \ INTERFACE void __ubsan_handle_##name##_minimal() { \ __ubsan_report_error(kind, GET_CALLER_PC(), nullptr); \ + } \ + INTERFACE void __ubsan_handle_##name##_minimal_preserve() \ + [[clang::preserve_all]] { \ + __ubsan_report_error_preserve(kind, GET_CALLER_PC(), nullptr); \ } #define HANDLER_NORECOVER(name, kind) \ @@ -146,6 +161,10 @@ void NORETURN CheckFailed(const char *file, int, const char *cond, u64, u64) { #define HANDLER_RECOVER_PTR(name, kind) \ INTERFACE void __ubsan_handle_##name##_minimal(const uintptr_t address) { \ __ubsan_report_error(kind, GET_CALLER_PC(), &address); \ + } \ + INTERFACE void __ubsan_handle_##name##_minimal_preserve( \ + const uintptr_t address) [[clang::preserve_all]] { \ + __ubsan_report_error_preserve(kind, GET_CALLER_PC(), &address); \ } #define HANDLER_NORECOVER_PTR(name, kind) \ diff --git a/compiler-rt/test/ubsan_minimal/TestCases/test-darwin-interface.c b/compiler-rt/test/ubsan_minimal/TestCases/test-darwin-interface.c index abc1073e02073..3c76e5aadc087 100644 --- a/compiler-rt/test/ubsan_minimal/TestCases/test-darwin-interface.c +++ b/compiler-rt/test/ubsan_minimal/TestCases/test-darwin-interface.c @@ -4,6 +4,7 @@ // REQUIRES: x86_64-darwin // RUN: nm -jgU `%clangxx_min_runtime -fsanitize-minimal-runtime -fsanitize=undefined %s -o %t '-###' 2>&1 | grep "libclang_rt.ubsan_minimal_osx_dynamic.dylib" | sed -e 's/.*"\(.*libclang_rt.ubsan_minimal_osx_dynamic.dylib\)".*/\1/'` | grep "^___ubsan_handle" \ +// RUN: | grep -vE "_minimal_preserve" \ // RUN: | sed 's/_minimal//g' \ // RUN: > %t.minimal.symlist // |
🐧 Linux x64 Test Results
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vitalybuka approved these changes Nov 20, 2025
fmayer deleted the users/fmayer/spr/ubsan-compiler-rt-add-preservecc-variants-of-handlers-1 branch fmayer added a commit that referenced this pull request Nov 21, 2025
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| LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/22606 Here is the relevant piece of the build log for the reference |
llvm-sync bot pushed a commit to arm/arm-toolchain that referenced this pull request Nov 21, 2025
…andlers" (#168973) Reverts llvm/llvm-project#168643
nekoshirro pushed a commit to nekoshirro/Alchemist-LLVM that referenced this pull request Nov 24, 2025
…168973) Reverts llvm/llvm-project#168643 Signed-off-by: Hafidz Muzakky <ais.muzakky@gmail.com>
aadeshps-mcw pushed a commit to aadeshps-mcw/llvm-project that referenced this pull request Nov 26, 2025
aadeshps-mcw pushed a commit to aadeshps-mcw/llvm-project that referenced this pull request Nov 26, 2025
Priyanshu3820 pushed a commit to Priyanshu3820/llvm-project that referenced this pull request Nov 26, 2025
Priyanshu3820 pushed a commit to Priyanshu3820/llvm-project that referenced this pull request Nov 26, 2025
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