File: ubsan-trap-debugloc.c

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (24 lines) | stat: -rw-r--r-- 911 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
// RUN: %clang_cc1 -emit-llvm -disable-llvm-passes -O -fsanitize=signed-integer-overflow -fsanitize-trap=signed-integer-overflow %s -o - -debug-info-kind=line-tables-only | FileCheck %s


void foo(volatile int a) {
  // CHECK-LABEL: @foo
  // CHECK: call void @llvm.ubsantrap(i8 0){{.*}} !dbg [[LOC:![0-9]+]]
  a = a + 1;
  a = a + 1;
}

void bar(volatile int a) __attribute__((optnone)) {
  // CHECK-LABEL: @bar
  // CHECK: call void @llvm.ubsantrap(i8 0){{.*}} !dbg [[LOC2:![0-9]+]]
  // CHECK: call void @llvm.ubsantrap(i8 0){{.*}} !dbg [[LOC3:![0-9]+]]
  a = a + 1;
  a = a + 1;
}

// With optimisations enabled the traps are merged and need to share a debug location
// CHECK: [[LOC]] = !DILocation(line: 0

// With optimisations disabled the traps are not merged and retain accurate debug locations
// CHECK: [[LOC2]] = !DILocation(line: 15, column: 9
// CHECK: [[LOC3]] = !DILocation(line: 16, column: 9