Fork#39146: mingw linker creates invalid PE files
Open Date: 2019-04-20 09:00
Last Update: 2019-05-21 06:48
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/39146
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Last Changes/Comment on this Ticket:
2019-05-21 06:48 Updated by: brucedawson
Comment:
I'm not sure why you took offense at the bug report. I was just trying to point
out a problem that I had noticed, that's all.
there is no evidence that our tools play any part in its creation
This is a crucial question, I agree. I am verifying whether git.exe is built
using the mingw toolchain. I thought that it was but I cannot find confirmation
at the moment.
The Windows loader successfully runs git.exe, which is nice, but that doesn't
mean that it is a valid PE file, it just means that WIndows can find enough
correct information to load it. dumpbin looks at different fields and reports
that some of these are wrong. In a comment from Microsoft on the bug (since
deleted, so I put it back up) they said:
"The executable contains invalid values in PE file header. As shown below, the
"file pointer to symbol table" is 0x62200, while the file size is only 40,728
bytes. 62200 file pointer to symbol table 7C2 number of symbols The PE seems
fine if we ignore those two fields."
So, Microsoft has told us *exactly* which fields are wrong, and what is wrong
with them. They will be fixing dumpbin to handle these incorrect PE files, but
they are still incorrect. If they are produced by the mingw linker
TL;DR - the git.exe binary has at least one invalid field, the "file pointer to
symbol table". If git.exe is produced by the mingw linker then this bug is
valid. If not, then not. I'll update this bug when I know more.
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Ticket Status:
Reporter: brucedawson
Owner: (None)
Type: Issues
Status: Closed
Priority: 5 - Medium
MileStone: (None)
Component: (None)
Severity: 5 - Medium
Resolution: Won't Fix
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Ticket details:
When using git.exe on Windows as part of the Chromium project I tried to obtain
details about the debug information (PDB files) associated with git.exe by
using Visual Studio's dumpbin. This failed due to invalid fields in the git.exe
PE file. Details can be found in this Visual Studio bug:
https://developercommunity.visualstudio.com/content/problem/386596/
dumpbin-fails-on-gitexe-for-windows.html
Although Microsoft may update dumpbin to work around this bug in the git.exe
binary as created by mingw it would be preferable if mingw would stop creating
invalid PE files.
I obtained git.exe from https://github.com/git-for-windows/git/tree/
v2.19.1.windows.1
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