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Using this, you can use llvm-pdbutil to export the contents of a
stream to a binary file, then run explain on the binary file so
that it treats the offset as an offset into the stream instead
of an offset into a file. This makes it easy to compare the
contents of the same stream from two different files.
llvm-svn: 329207
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This will show more detail when using `llvm-pdbutil explain` on an
offset in the DBI or PDB streams. Specifically, it will dig into
individual header fields and substreams to give a more precise
description of what the byte represents.
llvm-svn: 328878
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When investigating various things, we often have a file offset
and what to know what's in the PDB at that address. For example
we may be doing a binary comparison of two LLD-generated PDBs
to look for sources of non-determinism, or we may wish to compare
an LLD-generated PDB with a Microsoft generated PDB for sources
of byte-for-byte incompatibility. In these cases, we can do a
binary diff of the two files, and once we find a mismatched byte
we can use explain to figure out what that byte is, immediately
honining in on the problem.
This patch implements this by trying to narrow the meaning of
a particular file offset down as much as possible.
Differential Revision: https://reviews.llvm.org/D44959
llvm-svn: 328799
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