https://bugs.llvm.org/show_bug.cgi?id=33676
Bug ID: 33676
Summary: Debug information for OpenMP regions is broken
Product: OpenMP
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Clang Compiler Support
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 18743
--> https://bugs.llvm.org/attachment.cgi?id=18743&action=edit
Simple tasking program
For the simple attached tasking program, llvm-ir generated with:
clang -fopenmp task.c -S -emit-llvm -g
generates DILocation entries for the outlined OpenMP regions, that refer to
line 0. As a result, tools like addr2line and gdb fail to resolve the source
line for the OpenMP regions.
For the attached code compiled with Clang 4.0.1, gdb can set a breakpoint in
the task region, but then fails to resolve the source line:
$ clang -fopenmp task.c -g
$ gdb ./a.out
(gdb) b 13
(gdb) r
Breakpoint 1, 0x0000000000400a5d in .omp_task_entry. ()
(gdb) s
Single stepping until exit from function .omp_task_entry.,
which has no line number information.
With current trunk, it can't even stop at line 13. Instead, the breakpoint is
hit right after the task construct.
Report by Joachim Protze.
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