Breakpad creates minidump files that can a module loaded multiple times. We found that when a process mmap's the object file for a library, this can confuse breakpad into creating multiple modules in the module list. This patch fixes the GetFilteredModules() to check the linux maps for permissions and use the one that has execute permissions. Typically when people mmap a file into memory they don't map it as executable. This helps people to correctly load minidump files for post mortem analysis.
Differential Revision: https://reviews.llvm.org/D86375
LLDB has a few different styles of header guards and they're not very
consistent because things get moved around or copy/pasted. This patch
unifies the header guards across LLDB and converts everything to match
LLVM's style.
Differential revision: https://reviews.llvm.org/D74743
The goal of this refactor is to enable ProcessMinidump to take into
account the loaded modules and their sections when computing the
permissions of various ranges of memory, as discussed in D66638.
This patch moves some of the responsibility for computing the ranges
from MinidumpParser into ProcessMinidump. MinidumpParser still does the
parsing, but ProcessMinidump becomes responsible for answering the
actual queries about memory ranges. This will enable it (in a follow-up
patch) to augment the information obtained from the parser with data
obtained from actual object files.
The changes in the actual code are fairly straight-forward and just
involve moving code around. MinidumpParser::GetMemoryRegions is renamed
to BuildMemoryRegions to emphasize that it does no caching. The only new
thing is the additional bool flag returned from this function. This
indicates whether the returned regions describe all memory mapped into
the target process. Data obtained from /proc/maps and the MemoryInfoList
stream is considered to be exhaustive. Data obtained from Memory(64)List
is not. This will be used to determine whether we need to augment the
data or not.
This reshuffle means that it is no longer possible/easy to test some of
this code via unit tests, as constructing a ProcessMinidump instance is
hard. Instead, I update the unit tests to only test the parsing of the
actual data, and test the answering of queries through a lit test using
the "memory region" command. The patch also includes some tweaks to the
MemoryRegion class to make the unit tests easier to write.
Reviewers: amccarth, clayborg
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D69035
Summary: The types defined for it in LLDB are now redundant with core types.
Reviewers: labath, clayborg
Reviewed By: clayborg
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D68658
llvm-svn: 375243
In this patch, I just remove the structure definitions for the
ModuleList stream and the associated parsing code. The rest of the code
is converted to work with the definitions in llvm. NFC.
llvm-svn: 358070
I also update the tests for SystemInfo parsing to use the yaml2minidump
capabilities in llvm instead of relying on checked-in binaries.
llvm-svn: 357896
This patch removes the lower layers of the minidump parsing code from
the MinidumpParser class, and replaces it with the minidump parser in
llvm.
Not all functionality is already avaiable in the llvm class, but it is
enough for us to be able to stop enumerating streams manually, and rely
on the minidump directory parsing code from the llvm class.
This also removes some checked-in binaries which were used to test error
handling in the parser, as the error handling is now done (and tested)
in llvm. Instead I just add one test that ensures we correctly propagate
the errors reported by the llvm parser. The input for this test can be
written in yaml instead of a checked-in binary.
llvm-svn: 357748
This is the next step in moving the minidump parsing into llvm. I remove
the minidump structures already defined in the llvm Object library and
convert our parser to use those. NFC.
llvm-svn: 356992
This patch begins the process of migrating the "minidump" plugin to the
minidump parser in llvm. The llvm parser is not fully finished yet, but
even now, a lot of things can be switched over. The gradual migration
process will allow us to easier detect if things break than doing a big
one-step migration. Doing it early will allow us to make sure that the
llvm parser fits the use case that we need in lldb.
In this patch I start with the various minidump constants, which have
their llvm equivalent. It doesn't contain any functional changes. The
diff just reflects the different naming of things in llvm.
llvm-svn: 356898
remove the Initialize function, move the things that can fail into the
static factory function. The factory function now returns
Expected<Parser> instead of Optional<Parser> so that it can give a
reason why creation failed.
llvm-svn: 354668
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
Each process plug-in can create its own custom commands. I figured it would be nice to be able to dump things from the minidump file from the lldb command line, so I added the start of the some custom commands.
Currently you can dump:
minidump stream directory
all linux specifc streams, most of which are strings
each linux stream individually if desired, or all with --linux
The idea is we can expand the command set to dump more things, search for data in the core file, and much more. This patch gets us started.
Differential Revision: https://reviews.llvm.org/D55727
llvm-svn: 349429
Breakpad creates minidump files that sometimes have:
- linux maps textual content
- no MemoryInfoList
Right now unless the file has a MemoryInfoList we get no region information.
This patch:
- reads and caches the memory region info one time and sorts it for easy subsequent access
- get the region info from the best source in this order:
- linux maps info (if available)
- MemoryInfoList (if available)
- MemoryList or Memory64List
- returns memory region info for the gaps between regions (before the first and after the last)
Differential Revision: https://reviews.llvm.org/D55522
llvm-svn: 349182
This patch removes the comments grouping header includes. They were
added after running IWYU over the LLDB codebase. However they add little
value, are often outdates and burdensome to maintain.
llvm-svn: 346626
In this patch I add support for ARM and ARM64 break pad files. There are two flavors of ARM: Apple where FP is R7, and non Apple where FP is R11. Added minimal tests that load up ARM64 and the two flavors or ARM core files with a single thread and known register values in each register. Each register is checked for the exact value.
This is a fixed version of: https://reviews.llvm.org/D49750
The changes from D49750 are:
Don't init the m_arch in the Initialize call as a system info isn't required. This keeps the thread list, module list and other tests from failing
Added -Wextended-offsetof to Xcode project so we catch use extended usages of offsetof before submission
Fixed any extended offset of warnings
Differential Revision: https://reviews.llvm.org/D50336
llvm-svn: 339032
This reverts commit r338734 (and subsequent fixups in r338772 and
r338746), because it breaks some minidump unit tests and introduces a
lot of compiler warnings.
llvm-svn: 338828
In this patch I add support for ARM and ARM64 break pad files. There are two flavors of ARM: Apple where FP is R7, and non Apple where FP is R11. Added minimal tests that load up ARM64 and the two flavors or ARM core files with a single thread and known register values in each register. Each register is checked for the exact value.
Differential Revision: https://reviews.llvm.org/D49750
llvm-svn: 338734
Corrupted minidumps was leading to unpredictable behavior.
This change adds explicit consistency checks for the minidump early on. The
checks are not comprehensive but they should catch obvious structural violations:
streams with type == 0
duplicate streams (same type)
overlapping streams
truncated minidumps
Another early check is to make sure we actually support the minidump architecture
instead of crashing at a random place deep inside LLDB.
Differential Revision: https://reviews.llvm.org/D49202
llvm-svn: 336918
This change adds support for two types of Minidump CodeView records:
PDB70 (reference: https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html)
This is by far the most common record type.
ELF BuildID (found in Breakpad/Crashpad generated minidumps)
This would set a proper UUID for placeholder modules, in turn enabling
an accurate match with local module images.
Differential Revision: https://reviews.llvm.org/D46292
llvm-svn: 331394
The rationale here is that ArchSpec is used throughout the codebase,
including in places which should not depend on the rest of the code in
the Core module.
This commit touches many files, but most of it is just renaming of
#include lines. In a couple of cases, I removed the #include ArchSpec
line altogether, as the file was not using it. In one or two places,
this necessitated adding other #includes like lldb-private-defines.h.
llvm-svn: 318048
This renames the LLDB error class to Status, as discussed
on the lldb-dev mailing list.
A change of this magnitude cannot easily be done without
find and replace, but that has potential to catch unwanted
occurrences of common strings such as "Error". Every effort
was made to find all the obvious things such as the word "Error"
appearing in a string, etc, but it's possible there are still
some lingering occurences left around. Hopefully nothing too
serious.
llvm-svn: 302872
This moves the following classes from Core -> Utility.
ConstString
Error
RegularExpression
Stream
StreamString
The goal here is to get lldbUtility into a state where it has
no dependendencies except on itself and LLVM, so it can be the
starting point at which to start untangling LLDB's dependencies.
These are all low level and very widely used classes, and
previously lldbUtility had dependencies up to lldbCore in order
to use these classes. So moving then down to lldbUtility makes
sense from both the short term and long term perspective in
solving this problem.
Differential Revision: https://reviews.llvm.org/D29427
llvm-svn: 293941
Summary:
This plugin resembles the already existing Windows-only Minidump plugin.
The WinMinidumpPlugin uses the Windows API for parsing Minidumps
while this plugin is cross-platform because it includes a Minidump
parser (which is already commited)
It is able to produce a backtrace, to read the general puprose regiters,
inspect local variables, show image list, do memory reads, etc.
For now the only arches that this supports are x86_32 and x86_64.
This is because I have only written register contexts for those.
Others will come in next CLs.
I copied the WinMinidump tests and adapted them a little bit for them to
work with the new plugin (and they pass)
I will add more tests, aiming for better code coverage.
There is still functionality to be added, see TODOs in code.
Reviewers: labath, zturner
Subscribers: beanz, mgorny, modocache, lldb-commits, amccarth
Differential Revision: https://reviews.llvm.org/D25905
llvm-svn: 285587
Summary:
Now the Minidump parser can parse the:
1) MemoryInfoList - containing region info about memory ranges (readable,
writable, executable)
2) Memory64List - this is the stuct used when the Minidump is a
full-memory one.
3) Adding filtering of the module list (shared libraries list) - there
can be mutliple records in the module list under the same name but with
different load address (e.g. when the binary has non contigious
sections). FilterModuleList eliminates the duplicated modules, leaving
the one with the lowest load addr.
Added unit tests for everything.
Reviewers: labath, zturner
Subscribers: beanz, mgorny, modocache, lldb-commits, amccarth
Differential Revision: https://reviews.llvm.org/D25569
llvm-svn: 284593
Tests are failing and build is failing on windows and darwin.
Will fix and commit it later
-------------------------------------------------------------
Revert "xfailing minidump tests again ... :("
This reverts commit 97eade002c9e43c1e0d11475a4888083a8965044.
Revert "Fixing new Minidump plugin tests"
This reverts commit 0dd93b3ab39c8288696001dd50b9a093b813b09c.
Revert "Add the new minidump files to the Xcode project."
This reverts commit 2f638a1d046b8a88e61e212220edc40aecd2ce44.
Revert "xfailing tests for Minidump plugin"
This reverts commit 99311c0b22338a83e6a00c4fbddfd3577914c003.
Revert "Adding a new Minidump post-mortem debugging plugin"
This reverts commit b09a7e4dae231663095a84dac4be3da00b03a021.
llvm-svn: 283352
Summary:
This plugin resembles the already existing Windows-only Minidump plugin.
The WinMinidumpPlugin uses the Windows API for parsing Minidumps
while this plugin is cross-platform because it includes a Minidump
parser (which is already commited)
It is able to produce a backtrace, to read the general puprose regiters,
inspect local variables, show image list, do memory reads, etc.
For now the only arch that this supports is x86 64 bit
This is because I have only written a register context for that arch.
Others will come in next CLs.
I copied the WinMinidump tests and adapted them a little bit for them to
work with the new plugin (and they pass)
I will add more tests, aiming for better code coverage.
There is still functionality to be added, see TODOs in code.
Reviewers: labath, zturner
Subscribers: beanz, mgorny, amccarth, lldb-commits, modocache
Differential Revision: https://reviews.llvm.org/D25196
llvm-svn: 283259
Summary:
This is a register context converter from Minidump to Linux reg context.
This knows the layout of the register context in the Minidump file
(which is the same as in Windows FYI) and as a result emits a binary data
buffer that matches the Linux register context binary layout.
This way we can reuse the existing RegisterContextLinux_x86_64 and
RegisterContextCorePOSIX_x86_64 classes.
Reviewers: labath, zturner
Subscribers: beanz, mgorny, lldb-commits, amccarth
Differential Revision: https://reviews.llvm.org/D24919
llvm-svn: 282529
Summary:
Added parsing of the MiscInfo data stream.
The main member of it that we care about is the process_id
On Linux generated Minidump (from breakpad) we don't have
the MiscInfo, we have the /proc/$pid/status from where we can get the
pid.
Also parsing the module list - the list of all of the loaded
modules/shared libraries.
Parsing the exception stream.
Parsing MinidumpStrings.
I have unit tests for all of that.
Also added some tests using a Minidump generated from Windows tools (not
from breakpad)
Reviewers: labath, zturner
Subscribers: beanz, lldb-commits
Differential Revision: https://reviews.llvm.org/D24385
llvm-svn: 281348
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
Summary:
This is a Minidump parsing code.
There are still some more structures/data streams that need to be added.
The aim ot this is to be used in the implementation of
a minidump debugging plugin that works on all platforms/architectures.
Currently we have a windows-only plugin that uses the WinAPI to parse
the dump files.
Also added unittests for the current functionality.
Reviewers: labath, amccarth
Subscribers: tberghammer, danalbert, srhines, lldb-commits, dschuff
Differential Revision: https://reviews.llvm.org/D23545
llvm-svn: 280356
Greg Clayton