maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/test/CodeGen/unsigned-overflow-minimal.c

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

22 lines
619 B
C
Raw Normal View History

Minimal runtime for UBSan. Summary: An implementation of ubsan runtime library suitable for use in production. Minimal attack surface. * No stack traces. * Definitely no C++ demangling. * No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general. * as simple as possible Minimal CPU and RAM overhead. * Source locations unnecessary in the presence of (split) debug info. * Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at. * above two items save 3% binary size. When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt. Reviewers: pcc, kcc Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D36810 llvm-svn: 312029
2017-08-30 04:03:51 +08:00
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=unsigned-integer-overflow -fsanitize-minimal-runtime %s -emit-llvm -o - | FileCheck %s
unsigned long li, lj, lk;
Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" This reverts commit 789a46f2d742e11edaade28cb59a0f4d2a1d770e. Accidentally committed.
2020-02-04 02:09:39 +08:00
// CHECK-LABEL: define void @testlongadd()
Minimal runtime for UBSan. Summary: An implementation of ubsan runtime library suitable for use in production. Minimal attack surface. * No stack traces. * Definitely no C++ demangling. * No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general. * as simple as possible Minimal CPU and RAM overhead. * Source locations unnecessary in the presence of (split) debug info. * Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at. * above two items save 3% binary size. When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt. Reviewers: pcc, kcc Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D36810 llvm-svn: 312029
2017-08-30 04:03:51 +08:00
void testlongadd() {
// CHECK: call void @__ubsan_handle_add_overflow_minimal_abort()
li = lj + lk;
}
Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" This reverts commit 789a46f2d742e11edaade28cb59a0f4d2a1d770e. Accidentally committed.
2020-02-04 02:09:39 +08:00
// CHECK-LABEL: define void @testlongsub()
Minimal runtime for UBSan. Summary: An implementation of ubsan runtime library suitable for use in production. Minimal attack surface. * No stack traces. * Definitely no C++ demangling. * No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general. * as simple as possible Minimal CPU and RAM overhead. * Source locations unnecessary in the presence of (split) debug info. * Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at. * above two items save 3% binary size. When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt. Reviewers: pcc, kcc Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D36810 llvm-svn: 312029
2017-08-30 04:03:51 +08:00
void testlongsub() {
// CHECK: call void @__ubsan_handle_sub_overflow_minimal_abort()
li = lj - lk;
}
Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" This reverts commit 789a46f2d742e11edaade28cb59a0f4d2a1d770e. Accidentally committed.
2020-02-04 02:09:39 +08:00
// CHECK-LABEL: define void @testlongmul()
Minimal runtime for UBSan. Summary: An implementation of ubsan runtime library suitable for use in production. Minimal attack surface. * No stack traces. * Definitely no C++ demangling. * No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general. * as simple as possible Minimal CPU and RAM overhead. * Source locations unnecessary in the presence of (split) debug info. * Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at. * above two items save 3% binary size. When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt. Reviewers: pcc, kcc Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D36810 llvm-svn: 312029
2017-08-30 04:03:51 +08:00
void testlongmul() {
// CHECK: call void @__ubsan_handle_mul_overflow_minimal_abort()
li = lj * lk;
}