Bug 382978

Summary:	valgrind: LOAD_PDB_DEBUGINFO: \032 header character not found. possible invalid/unsupported pdb file format
Product:	[Developer tools] valgrind	Reporter:	Austin English <austinenglish>
Component:	general	Assignee:	Julian Seward <jseward>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	3.14 SVN
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	mscorlib.pdb makecert.pdb

Description Austin English 2017-08-01 04:25:42 UTC

Created attachment 106998 [details]
mscorlib.pdb

Microsoft's C# compiler (Rosylyn, also used by Mono, https://github.com/dotnet/roslyn/) generates PDBs that are of a different format than those generated by Visual Studio for C/C++.

This revealed itself because wine-mono accidentally shipped .pdb files, and running wine's dlls/mscoree/tests/mscoree.c tests crashed valgrind (bug 382515).

Now, it ignores those pdb files instead. It would be nice if these files were supported, but at least for Wine, it's probably not worth the effort, as only a tiny part of the code uses it. But if valgrind becomes popular for C#, it may be more important.

==1193== Warning: Missing or un-stat-able /home/austin/.wine/drive_c/windows/mono/mono-2.0/bin/libmono-2.0-x86.pdb
==1193== LOAD_PDB_DEBUGINFO: \032 header character not found.  possible invalid/unsupported pdb file format?
==1193== LOAD_PDB_DEBUGINFO: find_pdb_header found no hdr.  possible invalid/unsupported pdb file format?
==1193== LOAD_PDB_DEBUGINFO: failed loading info from /home/austin/.wine/drive_c/windows/mono/mono-2.0/lib/mono/4.5/mscorlib.pdb

Comment 1 Austin English 2017-08-01 04:27:10 UTC

Created attachment 106999 [details]
makecert.pdb

I'm also attaching a small pdb file that may be easier to analyze.

Comment 2 Austin English 2017-08-01 04:28:57 UTC

Forgot to mention in first comment; the PDB format is now publicly documented, at https://github.com/Microsoft/microsoft-pdb