Ubuntu Manpage: llvm-pdbutil - PDB File forensics and diagnostics

NAME

       llvm-pdbutil - PDB File forensics and diagnostics

       • Synopsis

       • Description

       • Subcommands

         • pretty

           • Summary

           • Options

             • Filtering and Sorting Options

             • Symbol Type Options

             • Other Options

         • dump

           • Summary

           • Options

             • MSF Container Options

             • Module & File Options

             • Symbol Options

             • Type Record Options

             • Miscellaneous Options

         • bytes

           • Summary

           • Options

             • MSF File Options

             • PDB Stream Options

             • DBI Stream Options

             • Module Options

             • Type Record Options

         • pdb2yaml

           • Summary

           • Options

         • yaml2pdb

           • Summary

           • Options

         • merge

           • Summary

           • Options

SYNOPSIS

       llvm-pdbutil [subcommand] [options]

DESCRIPTION

       Display  types,  symbols,  CodeView records, and other information from a PDB file, as well as manipulate
       and create PDB files.  llvm-pdbutil is normally used by FileCheck-based tests to test LLVM’s PDB  reading
       and writing functionality, but can also be used for general PDB file investigation and forensics, or as a
       replacement for cvdump.

SUBCOMMANDS

llvm-pdbutil is separated into several subcommands each tailored to a different purpose. A brief summary
of each command follows, with more detail in the sections that follow.

• pretty - Dump symbol and type information in a format that tries to look as much like the original
source code as possible.

• dump - Dump low level types and structures from the PDB file, including CodeView records, hash
tables, PDB streams, etc.

• bytes - Dump data from the PDB file’s streams, records, types, symbols, etc as raw bytes.

• yaml2pdb - Given a yaml description of a PDB file, produce a valid PDB file that matches that
description.

• pdb2yaml - For a given PDB file, produce a YAML description of some or all of the file in a way that
the PDB can be reconstructed.

• merge - Given two PDBs, produce a third PDB that is the result of merging the two input PDBs.

pretty
IMPORTANT:
The pretty subcommand is built on the Windows DIA SDK, and as such is not supported on non-Windows
platforms.

USAGE: llvm-pdbutil pretty [options] <input PDB file>

Summary
The pretty subcommand displays a very high level representation of your program’s debug info. Since it
is built on the Windows DIA SDK which is the standard API that Windows tools and debuggers query debug
information, it presents a more authoritative view of how a debugger is going to interpret your debug
information than a mode which displays low-level CodeView records.

Options
Filtering and Sorting Options
NOTE:
exclude filters take priority over include filters. So if a filter matches both an include and an
exclude rule, then it is excluded.

-exclude-compilands=<string>
When dumping compilands, compiland source-file contributions, or per-compiland symbols, this
option instructs llvm-pdbutil to omit any compilands that match the specified regular expression.

-exclude-symbols=<string>
When dumping global, public, or per-compiland symbols, this option instructs llvm-pdbutil to omit
any symbols that match the specified regular expression.

-exclude-types=<string>
When dumping types, this option instructs llvm-pdbutil to omit any types that match the specified
regular expression.

-include-compilands=<string>
When dumping compilands, compiland source-file contributions, or per-compiland symbols, limit the
initial search to only those compilands that match the specified regular expression.

-include-symbols=<string>
When dumping global, public, or per-compiland symbols, limit the initial search to only those
symbols that match the specified regular expression.

-include-types=<string>
When dumping types, limit the initial search to only those types that match the specified regular
expression.

-min-class-padding=<uint>
Only display types that have at least the specified amount of alignment padding, accounting for
padding in base classes and aggregate field members.

-min-class-padding-imm=<uint>
Only display types that have at least the specified amount of alignment padding, ignoring padding
in base classes and aggregate field members.

-min-type-size=<uint>
Only display types T where sizeof(T) is greater than or equal to the specified amount.

-no-compiler-generated
Don’t show compiler generated types and symbols

-no-enum-definitions
When dumping an enum, don’t show the full enum (e.g. the individual enumerator values).

-no-system-libs
Don’t show symbols from system libraries

Symbol Type Options
-all Implies all other options in this category.

-class-definitions=<format>
Displays class definitions in the specified format.

=all - Display all class members including data, constants, typedefs, functions, etc (default)
=layout - Only display members that contribute to class size.
=none - Don't display class definitions (e.g. only display the name and base list)

-class-order
Displays classes in the specified order.

=none - Undefined / no particular sort order (default)
=name - Sort classes by name
=size - Sort classes by size
=padding - Sort classes by amount of padding
=padding-pct - Sort classes by percentage of space consumed by padding
=padding-imm - Sort classes by amount of immediate padding
=padding-pct-imm - Sort classes by percentage of space consumed by immediate padding

-class-recurse-depth=<uint>
When dumping class definitions, stop after recursing the specified number of times. The default
is 0, which is no limit.

-classes
Display classes

-compilands
Display compilands (e.g. object files)

-enums Display enums

-externals
Dump external (e.g. exported) symbols

-globals
Dump global symbols

-lines Dump the mappings between source lines and code addresses.

-module-syms
Display symbols (variables, functions, etc) for each compiland

-sym-types=<types>
Type of symbols to dump when -globals, -externals, or -module-syms is specified. (default all)

=thunks - Display thunk symbols
=data - Display data symbols
=funcs - Display function symbols
=all - Display all symbols (default)

-symbol-order=<order>
For symbols dumped via the -module-syms, -globals, or -externals options, sort the results in
specified order.

=none - Undefined / no particular sort order
=name - Sort symbols by name
=size - Sort symbols by size

-typedefs
Display typedef types

-types Display all types (implies -classes, -enums, -typedefs)

Other Options
-color-output
Force color output on or off. By default, color if used if outputting to a terminal.

-load-address=<uint>
When displaying relative virtual addresses, assume the process is loaded at the given address and
display what would be the absolute address.

dump
USAGE: llvm-pdbutil dump [options] <input PDB file>

Summary
The dump subcommand displays low level information about the structure of a PDB file. It is used heavily
by LLVM’s testing infrastructure, but can also be used for PDB forensics. It serves a role similar to
that of Microsoft’s cvdump tool.

NOTE:
The dump subcommand exposes internal details of the file format. As such, the reader should be
familiar with /PDB/index before using this command.

Options
MSF Container Options
-streams
dump a summary of all of the streams in the PDB file.

-stream-blocks
In conjunction with -streams, add information to the output about what blocks the specified stream
occupies.

-summary
Dump MSF and PDB header information.

Module & File Options
-modi=<uint>
For all options that dump information from each module/compiland, limit to the specified module.

-files Dump the source files that contribute to each displayed module.

-il Dump inlinee line information (DEBUG_S_INLINEELINES CodeView subsection)

-l Dump line information (DEBUG_S_LINES CodeView subsection)

-modules
Dump compiland information

-xme Dump cross module exports (DEBUG_S_CROSSSCOPEEXPORTS CodeView subsection)

-xmi Dump cross module imports (DEBUG_S_CROSSSCOPEIMPORTS CodeView subsection)

Symbol Options
-globals
dump global symbol records

-global-extras
dump additional information about the globals, such as hash buckets and hash values.

-publics
dump public symbol records

-public-extras
dump additional information about the publics, such as hash buckets and hash values.

-symbols
dump symbols (functions, variables, etc) for each module dumped.

-sym-data
For each symbol record dumped as a result of the -symbols option, display the full bytes of the
record in binary as well.

Type Record Options
-types Dump CodeView type records from TPI stream

-type-extras
Dump additional information from the TPI stream, such as hashes and the type index offsets array.

-type-data
For each type record dumped, display the full bytes of the record in binary as well.

-type-index=<uint>
Only dump types with the specified type index.

-ids Dump CodeView type records from IPI stream.

-id-extras
Dump additional information from the IPI stream, such as hashes and the type index offsets array.

-id-data
For each ID record dumped, display the full bytes of the record in binary as well.

-id-index=<uint>
only dump ID records with the specified hexadecimal type index.

-dependents
When used in conjunction with -type-index or -id-index, dumps the entire dependency graph for the
specified index instead of just the single record with the specified index. For example, if type
index 0x4000 is a function whose return type has index 0x3000, and you specify -dependents=0x4000,
then this would dump both records (as well as any other dependents in the tree).

Miscellaneous Options
-all Implies most other options.

-section-contribs
Dump section contributions.

-section-headers
Dump image section headers.

-section-map
Dump section map.

-string-table
Dump PDB string table.

bytes
USAGE: llvm-pdbutil bytes [options] <input PDB file>

Summary
Like the dump subcommand, the bytes subcommand displays low level information about the structure of a
PDB file, but it is used for even deeper forensics. The bytes subcommand finds various structures in a
PDB file based on the command line options specified, and dumps them in hex. Someone working on support
for emitting PDBs would use this heavily, for example, to compare one PDB against another PDB to ensure
byte-for-byte compatibility. It is not enough to simply compare the bytes of an entire file, or an
entire stream because it’s perfectly fine for the same structure to exist at different locations in two
different PDBs, and “finding” the structure is half the battle.

Options
MSF File Options
-block-range=<start[-end]>
Dump binary data from specified range of MSF file blocks.

-byte-range=<start[-end]>
Dump binary data from specified range of bytes in the file.

-fpm Dump the MSF free page map.

-stream-data=<string>
Dump binary data from the specified streams. Format is SN[:Start][@Size]. For example,
-stream-data=7:3@12 dumps 12 bytes from stream 7, starting at offset 3 in the stream.

PDB Stream Options
-name-map
Dump bytes of PDB Name Map

DBI Stream Options
-ec Dump the edit and continue map substream of the DBI stream.

-files Dump the file info substream of the DBI stream.

-modi Dump the modi substream of the DBI stream.

-sc Dump section contributions substream of the DBI stream.

-sm Dump the section map from the DBI stream.

-type-server
Dump the type server map from the DBI stream.

Module Options
-mod=<uint>
Limit all options in this category to the specified module index. By default, options in this
category will dump bytes from all modules.

-chunks
Dump the bytes of each module’s C13 debug subsection.

-split-chunks
When specified with -chunks, split the C13 debug subsection into a separate chunk for each
subsection type, and dump them separately.

-syms Dump the symbol record substream from each module.

Type Record Options
-id=<uint>
Dump the record from the IPI stream with the given type index.

-type=<uint>
Dump the record from the TPI stream with the given type index.

pdb2yaml
USAGE: llvm-pdbutil pdb2yaml [options] <input PDB file>

Summary
Options
yaml2pdb
USAGE: llvm-pdbutil yaml2pdb [options] <input YAML file>

Summary
Generate a PDB file from a YAML description. The YAML syntax is not described here. Instead, use
llvm-pdbutil pdb2yaml and examine the output for an example starting point.

Options
-pdb=<file-name>

Write the resulting PDB to the specified file.

merge
USAGE: llvm-pdbutil merge [options] <input PDB file 1> <input PDB file 2>

Summary
Merge two PDB files into a single file.

Options
-pdb=<file-name>

Write the resulting PDB to the specified file.

AUTHOR

       Maintained by the LLVM Team (https://llvm.org/).

COPYRIGHT

       2003-2020, LLVM Project