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cv2pdb: bad field alignment for dmc8.52 compiled executable

 
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Greatwolf



Joined: 14 Oct 2010
Posts: 4
Location: CA
PostPosted: Thu Oct 14, 2010 7:13 pm    Post subject: cv2pdb: bad field alignment for dmc8.52 compiled executable Reply with quote
the executable is compiled by dmc version 8.52 with -g option for emitting debug symbols. The linker is given /co when linking. I then run cv2pdb with this command:

Code:
cv2pdb -C test.exe test.pdb


yielding this error message:

Code:
test.exe: bad field alignment!


Code:
cv2pdb -C test.exe


Results in the same error. Any ideas what could be wrong? Any solutions to try?
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sagitario



Joined: 03 Mar 2007
Posts: 292
PostPosted: Fri Oct 22, 2010 12:19 pm    Post subject: Reply with quote
Hi,

sorry for not answering until now, but there is no notification mechanism for new topics in this forum ;-(

The error message is shown if there is some unexpected data in a list of entries for struct/class layout or enumerator values. This is probably caused by either bad debug info in the file or a misinterpretation by cv2pdb.

Is this a problem new to v852? If you can send me the executable to convert, I can have a look. If the file is more than 256k, it cannot be attached to a ticket, so please use r.sagitario at gmx dot de.

Quote:
Code:

cv2pdb -C test.exe test.pdb


This is a wrong syntax, as the second file name is the converted exe-file if the original file must not be changed. If you want to name the pdb-file, you must pass it as the third file name:

Code:

cv2pdb -C test.exe test2.exe test2.pdb


Rainer
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Greatwolf



Joined: 14 Oct 2010
Posts: 4
Location: CA
PostPosted: Sun Oct 24, 2010 2:34 am    Post subject: Reply with quote
Thanks for responding. I've opened a ticket regarding this bug which can be found here. As suggested, I've attached a small executable that causes cv2pdb to give that error.

Hope that helps in narrowing the bug down. Let me know if you need any other info.
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Greatwolf



Joined: 14 Oct 2010
Posts: 4
Location: CA
PostPosted: Sun Oct 24, 2010 5:53 pm    Post subject: Reply with quote
Thanks for the quick fix in v0.18, really appreciate it.

It looks like the alignment issue is fixed but shortly afterwards I found a crashing bug.

Here's the minimal code to reproduce the crash. As far as I could tell, it seems to happen with std::map and std::string not sure why:

Code:
#include <map>
#include <string>

int main()
{
  std::map<int, std::string> foomap;
}


Let me know if you need any further info or the above code in executable form.

Thanks
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sagitario



Joined: 03 Mar 2007
Posts: 292
PostPosted: Mon Oct 25, 2010 4:15 pm    Post subject: Reply with quote
A few more problems with very long names have shown up with this test case. I have now tried to push all limits to at least 4096 characters. The version 0.18 is updated, please give it another try.
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Greatwolf



Joined: 14 Oct 2010
Posts: 4
Location: CA
PostPosted: Mon Oct 25, 2010 8:29 pm    Post subject: Reply with quote
That did the trick, seems to be working good now. Thanks!
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