http://llvm.org/bugs/show_bug.cgi?id=16249
Bug ID: 16249
Summary: LLVM generates broken debug info on Windows
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Common Code Generator Code
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 10639
--> http://llvm.org/bugs/attachment.cgi?id=10639&action=edit
C source file
Compile the attached source and run under gdb:
>clang -g repro.c -o repro.exe
>gdb repro.exe
GNU gdb (GDB) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from C:\test\repro.exe...DW_FORM_strp pointing outside of
.debug_str section [in module C:\test\repro.exe]
Same source compiled with gcc work fine.
I've compared asm emitted by clang with that created by gcc, and the difference
seems to be that for inter-debug-section references gcc uses .secrel32 <label>
directive, whereas clang uses .long <label>. After manually replacing .long's
with .secrel32's and building executable, gdb seemed to like the new debug info
a lot more!
I've run into the same trouble with another project that uses LLVM, so this is
not clang-specific.
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