Revert "[ubsan_minimal] Allow UBSan handler from Minimal runtime to accept arguments (#152192)" #168812
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@llvm/pr-subscribers-compiler-rt-sanitizer @llvm/pr-subscribers-clang-codegen Author: Vitaly Buka (vitalybuka) ChangesWe don't have good use case for that, so revert it before we stuck with this API. This reverts commit a1209d8. Full diff: https://github.com/llvm/llvm-project/pull/168812.diff 4 Files Affected:
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index f2451b16e78be..ffc213b2bd331 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -3898,22 +3898,6 @@ void CodeGenFunction::EmitCheck(
Branch->setMetadata(llvm::LLVMContext::MD_prof, Node);
EmitBlock(Handlers);
- // Clear arguments for the MinimalRuntime handler.
- if (CGM.getCodeGenOpts().SanitizeMinimalRuntime) {
- switch (CheckHandler) {
- case SanitizerHandler::TypeMismatch:
- // Pass value pointer only. It adds minimal overhead.
- StaticArgs = {};
- assert(DynamicArgs.size() == 1);
- break;
- default:
- // No arguments for other checks.
- StaticArgs = {};
- DynamicArgs = {};
- break;
- }
- }
-
// Handler functions take an i8* pointing to the (handler-specific) static
// information block, followed by a sequence of intptr_t arguments
// representing operand values.
diff --git a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
index a2a2e36e8523d..ebc36a8583e05 100644
--- a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
+++ b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
@@ -34,16 +34,12 @@ static char *append_hex(uintptr_t d, char *buf, const char *end) {
return buf;
}
-static void format_msg(const char *kind, uintptr_t caller,
- const uintptr_t *address, char *buf, const char *end) {
+static void format_msg(const char *kind, uintptr_t caller, char *buf,
+ const char *end) {
buf = append_str("ubsan: ", buf, end);
buf = append_str(kind, buf, end);
buf = append_str(" by 0x", buf, end);
buf = append_hex(caller, buf, end);
- if (address) {
- buf = append_str(" address 0x", buf, end);
- buf = append_hex(*address, buf, end);
- }
buf = append_str("\n", buf, end);
if (buf == end)
--buf; // Make sure we don't cause a buffer overflow.
@@ -51,7 +47,7 @@ static void format_msg(const char *kind, uintptr_t caller,
}
SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error, const char *kind,
- uintptr_t caller, const uintptr_t *address) {
+ uintptr_t caller) {
if (caller == 0)
return;
while (true) {
@@ -84,32 +80,28 @@ SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error, const char *kind,
__sanitizer::atomic_store_relaxed(&caller_pcs[sz], caller);
char msg_buf[128];
- format_msg(kind, caller, address, msg_buf, msg_buf + sizeof(msg_buf));
+ format_msg(kind, caller, msg_buf, msg_buf + sizeof(msg_buf));
message(msg_buf);
}
}
SANITIZER_INTERFACE_WEAK_DEF(void, __ubsan_report_error_fatal, const char *kind,
- uintptr_t caller, const uintptr_t *address) {
+ uintptr_t caller) {
// Use another handlers, in case it's already overriden.
- __ubsan_report_error(kind, caller, address);
+ __ubsan_report_error(kind, caller);
}
#if defined(__ANDROID__)
extern "C" __attribute__((weak)) void android_set_abort_message(const char *);
-static void abort_with_message(const char *kind, uintptr_t caller,
- const uintptr_t *address) {
+static void abort_with_message(const char *kind, uintptr_t caller) {
char msg_buf[128];
- format_msg(kind, caller, address, msg_buf, msg_buf + sizeof(msg_buf));
+ format_msg(kind, caller, msg_buf, msg_buf + sizeof(msg_buf));
if (&android_set_abort_message)
android_set_abort_message(msg_buf);
abort();
}
#else
-static void abort_with_message(const char *kind, uintptr_t caller,
- const uintptr_t *address) {
- abort();
-}
+static void abort_with_message(const char *kind, uintptr_t caller) { abort(); }
#endif
#if SANITIZER_DEBUG
@@ -129,39 +121,21 @@ 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); \
+ __ubsan_report_error(kind, GET_CALLER_PC()); \
}
#define HANDLER_NORECOVER(name, kind) \
INTERFACE void __ubsan_handle_##name##_minimal_abort() { \
uintptr_t caller = GET_CALLER_PC(); \
- __ubsan_report_error_fatal(kind, caller, nullptr); \
- abort_with_message(kind, caller, nullptr); \
+ __ubsan_report_error_fatal(kind, caller); \
+ abort_with_message(kind, caller); \
}
#define HANDLER(name, kind) \
HANDLER_RECOVER(name, kind) \
HANDLER_NORECOVER(name, kind)
-#define HANDLER_RECOVER_PTR(name, kind) \
- INTERFACE void __ubsan_handle_##name##_minimal(const uintptr_t address) { \
- __ubsan_report_error(kind, GET_CALLER_PC(), &address); \
- }
-
-#define HANDLER_NORECOVER_PTR(name, kind) \
- INTERFACE void __ubsan_handle_##name##_minimal_abort( \
- const uintptr_t address) { \
- uintptr_t caller = GET_CALLER_PC(); \
- __ubsan_report_error_fatal(kind, caller, &address); \
- abort_with_message(kind, caller, &address); \
- }
-
-// A version of a handler that takes a pointer to a value.
-#define HANDLER_PTR(name, kind) \
- HANDLER_RECOVER_PTR(name, kind) \
- HANDLER_NORECOVER_PTR(name, kind)
-
-HANDLER_PTR(type_mismatch, "type-mismatch")
+HANDLER(type_mismatch, "type-mismatch")
HANDLER(alignment_assumption, "alignment-assumption")
HANDLER(add_overflow, "add-overflow")
HANDLER(sub_overflow, "sub-overflow")
diff --git a/compiler-rt/test/ubsan_minimal/TestCases/misalignment.cpp b/compiler-rt/test/ubsan_minimal/TestCases/misalignment.cpp
index cf828792a324f..3f01dc8444489 100644
--- a/compiler-rt/test/ubsan_minimal/TestCases/misalignment.cpp
+++ b/compiler-rt/test/ubsan_minimal/TestCases/misalignment.cpp
@@ -7,7 +7,7 @@ int *t;
int main() {
int r;
t = (int *)(((char *)&r) + 1);
- // CHECK: ubsan: type-mismatch by 0x{{[[:xdigit:]]+}} address 0x{{[[:xdigit:]]+$}}
+ // CHECK: ubsan: type-mismatch by 0x{{[[:xdigit:]]+}}
// CHECK-NOT: type-mismatch
f(*t);
}
diff --git a/compiler-rt/test/ubsan_minimal/TestCases/null.cpp b/compiler-rt/test/ubsan_minimal/TestCases/null.cpp
index c97527b72cd0c..b3d9db2b309d1 100644
--- a/compiler-rt/test/ubsan_minimal/TestCases/null.cpp
+++ b/compiler-rt/test/ubsan_minimal/TestCases/null.cpp
@@ -5,7 +5,7 @@ void f(int &n) {}
int *t;
int main() {
- // CHECK: ubsan: type-mismatch by 0x{{[[:xdigit:]]+}} address 0x{{[[:xdigit:]]+$}}
+ // CHECK: ubsan: type-mismatch by 0x{{[[:xdigit:]]+}}
// CHECK-NOT: type-mismatch
f(*t);
}
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approved these changes
Nov 21, 2025
vitalybuka
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users/vitalybuka/spr/revert-ubsan_minimal-allow-ubsan-handler-from-minimal-runtime-to-accept-arguments-152192
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aadeshps-mcw
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Nov 26, 2025
…ccept arguments (llvm#152192)" (llvm#168812) This partially reverts llvm#152192, keeping updated tests and some code reordering in clang/lib/CodeGen/CGExpr.cpp. compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp is exact revert (with followup llvm#152419) We don't have a good use case for that, so revert it before we are stuck maintaining this API. 21.x does not have this patch. This reverts commit a1209d8.
Priyanshu3820
pushed a commit
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that referenced
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Nov 26, 2025
…ccept arguments (llvm#152192)" (llvm#168812) This partially reverts llvm#152192, keeping updated tests and some code reordering in clang/lib/CodeGen/CGExpr.cpp. compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp is exact revert (with followup llvm#152419) We don't have a good use case for that, so revert it before we are stuck maintaining this API. 21.x does not have this patch. This reverts commit a1209d8.
augusto2112
pushed a commit
to augusto2112/llvm-project
that referenced
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Dec 3, 2025
…ccept arguments (llvm#152192)" (llvm#168812) This partially reverts llvm#152192, keeping updated tests and some code reordering in clang/lib/CodeGen/CGExpr.cpp. compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp is exact revert (with followup llvm#152419) We don't have a good use case for that, so revert it before we are stuck maintaining this API. 21.x does not have this patch. This reverts commit a1209d8.
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This partially reverts #152192, keeping updated tests and
some code reordering in clang/lib/CodeGen/CGExpr.cpp.
compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp is exact revert (with followup #152419)
We don't have a good use case for that, so revert it before we are stuck maintaining this API.
21.x does not have this patch.
This reverts commit a1209d8.