30 Commits

Author SHA1 Message Date
Jonas Devlieghere 73af341beb [lldb] Capture and load home directory from the reproducer.
When replaying the reproducer, lldb should source the .lldbinit file
that was captured by the reproducer and not the one in the current home
directory. This requires that we store the home directory as part of the
reproducer. By returning the virtual home directory during replay, we
ensure the correct virtual path gets constructed which the VFS can then
find and remap to the correct file in the reproducer root.

This patch adds a new HomeDirectoryProvider, similar to the existing
WorkingDirectoryProvider. As the home directory is not part of the VFS,
it is stored in LLDB's FileSystem instance.
2020-08-20 18:08:59 -07:00
Jonas Devlieghere 2451cbf07b [lldb/Reproducers] Intercept the FindProcesses API
This patch extends the reproducers to intercept calls to FindProcesses.
During capture it serializes the ProcessInstanceInfoList returned by the
API. During replay, it returns the serialized data instead of querying
the host.

The motivation for this patch is supporting the process attach workflow
during replay. Without this change it would incorrectly look for the
inferior on the host during replay and failing if no matching process
was found.

Differential revision: https://reviews.llvm.org/D75877
2020-03-13 09:31:35 -07:00
Jonas Devlieghere 4016c6b07f [lldb/Reproducer] Prevent crash when GDB multi-loader can't be created.
Check that the multi loader isn't null and print an error otherwise.
This patch also extends the test to cover these error paths.
2020-03-10 23:16:55 -07:00
Raphael Isemann 808142876c [lldb][NFC] Fix all formatting errors in .cpp file headers
Summary:
A *.cpp file header in LLDB (and in LLDB) should like this:
```
//===-- TestUtilities.cpp -------------------------------------------------===//
```
However in LLDB most of our source files have arbitrary changes to this format and
these changes are spreading through LLDB as folks usually just use the existing
source files as templates for their new files (most notably the unnecessary
editor language indicator `-*- C++ -*-` is spreading and in every review
someone is pointing out that this is wrong, resulting in people pointing out that this
is done in the same way in other files).

This patch removes most of these inconsistencies including the editor language indicators,
all the different missing/additional '-' characters, files that center the file name, missing
trailing `===//` (mostly caused by clang-format breaking the line).

Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D73258
2020-01-24 08:52:55 +01:00
Jonas Devlieghere 982a77b694 [lldb/Reproducers] Print more info for reproducer status
Reproducer status now prints the capture/replay path. It will also print
the status of auto generation when enabled.
2020-01-15 20:25:44 -08:00
Raphael Isemann 0683250127 [lldb][NFC] Remove unnecessary includes in source/Commands
Summary: This removes most of unnecessary includes in the `source/Commands` directory. This was generated by IWYU and a script that fixed all the bogus reports from IWYU. Patch is tested on Linux and macOS.

Reviewers: JDevlieghere

Reviewed By: JDevlieghere

Subscribers: krytarowski, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D71489
2019-12-16 08:59:08 +01:00
Eric Christopher 1d41d1bcdf Revert "Temporarily revert [lldb] e81268d - [lldb/Reproducers] Support multiple GDB remotes"
On multiple retry this issue won't duplicate - will revisit with author if
duplication works again.

This reverts commit c9e0b354e2.
2019-12-10 15:04:45 -08:00
Eric Christopher c9e0b354e2 Temporarily revert [lldb] e81268d - [lldb/Reproducers] Support multiple GDB remotes
This was causing a crash in opt+assert builds on linux and a follow-up
message was posted.

This reverts commit e81268d03e
2019-12-10 12:29:46 -08:00
Jonas Devlieghere e81268d03e [lldb/Reproducers] Support multiple GDB remotes
When running the test suite with always capture on, a handful of tests
are failing because they have multiple targets and therefore multiple
GDB remote connections. The current reproducer infrastructure is capable
of dealing with that.

This patch reworks the GDB remote provider to support multiple GDB
remote connections, similar to how the reproducers support shadowing
multiple command interpreter inputs. The provider now keeps a list of
packet recorders which deal with a single GDB remote connection. During
replay we rely on the order of creation to match the number of packets
to the GDB remote connection.

Differential revision: https://reviews.llvm.org/D71105
2019-12-10 11:16:52 -08:00
Jonas Devlieghere bb090bb1ca [Reproducer] Make 'reproducer xcrash' behave the same during capture & replay
There's no point in preventing this command from running during replay.
We should simulate the same crash as during capture.
2019-11-21 13:34:04 -08:00
Jonas Devlieghere 25f33d8318 [Reproducer] Limit signals to macro define sin <csignal>
SIGBUS is not part of the signal macros defined in the header <csignal>.
2019-11-20 14:28:37 -08:00
Jonas Devlieghere c8dfe90729 [Reproducer] Generate LLDB reproducer on crash
This patch hooks the reproducer infrastructure with the signal handlers.
When lldb crashes with reproducers capture enabled, it will now generate
the reproducer and print a short message the standard out. This doesn't
affect the pretty stack traces, which are still printed before.

This patch also introduces a new reproducer sub-command that
intentionally raises a given signal to test the reproducer signal
handling.

Currently the signal handler is doing too much work. Instead of copying
over files into the reproducers in the signal handler, we should
re-invoke ourselves with a special command line flag that looks at the
VFS mapping and performs the copy.

This is a NO-OP when reproducers are disabled.

Differential revision: https://reviews.llvm.org/D70474
2019-11-20 13:14:16 -08:00
Jonas Devlieghere 36eea5c31f [Reproducer] Namespace the reproducer dump options.
Make it clear that the current reproducer options are for dumping.
2019-11-19 16:19:43 -08:00
Jonas Devlieghere 0cf86da174 [Reproducer] Quit the debugger after generating a reproducer
Currently nothing prevents you from continuing your debug session after
generating the reproducer. This can cause the reproducer to end up in an
inconsistent state. Most of the time this doesn't matter, but I want to
prevent this from causing bugs in the future.
2019-11-11 14:29:53 -08:00
Jonas Devlieghere 64b7d95568 [Reproducer] Improve reproducer help (NFC)
Provide a little more detail for the reproducer command.

llvm-svn: 375292
2019-10-18 21:47:31 +00:00
Jonas Devlieghere f4f120125e [Reproducer] Support dumping the reproducer CWD
Add support for dumping the current working directory with
`reproducer dump -p cwd`.

llvm-svn: 375061
2019-10-17 00:02:00 +00:00
Jonas Devlieghere b2575da9aa [Reproducer] Add LoadBuffer<> helper (NFC)
Introduce a helper method named LoadBuffer in the Loader to abstract
reading a reproducer file from disk.

llvm-svn: 375060
2019-10-17 00:01:57 +00:00
Jonas Devlieghere 865cd0932f [Reproducer] Add convenience methods IsCapturing and IsReplaying.
Add convenience methods to the Reproducer class for when you don't need
access to the generator and the loader.

llvm-svn: 374236
2019-10-09 21:47:49 +00:00
Jonas Devlieghere 8fc8d3fe01 [Reproducer] Implement dumping packets.
This patch completes the dump functionality by adding support for
dumping a reproducer's GDB remote packets.

Differential revision: https://reviews.llvm.org/D67636

llvm-svn: 372046
2019-09-16 23:31:06 +00:00
Jonas Devlieghere 97fc8eb438 [Reproducer] Add reproducer dump command.
This adds a reproducer dump commands which makes it possible to inspect
a reproducer from inside LLDB. Currently it supports the Files, Commands
and Version providers. I'm planning to add support for the GDB Remote
provider in a follow-up patch.

Differential revision: https://reviews.llvm.org/D67474

llvm-svn: 371909
2019-09-13 23:27:31 +00:00
Jonas Devlieghere 130ec06843 [Reproducers] Fix incorrect help message
The help message mentioned the `log` command (probably because I copied
it from there originally).

llvm-svn: 367338
2019-07-30 18:06:38 +00:00
Jonas Devlieghere 973d66eefc [Reproducers] Improve reproducer help
Extend the documentation for the reproducer command.

llvm-svn: 359848
2019-05-03 00:10:31 +00:00
Jonas Devlieghere 1c5250abaa [Reproducers] Print warning when generating the reproducer.
Encourage users to look at the directory so they know what data they'd
be sharing by uploading the reproducer.

llvm-svn: 357507
2019-04-02 18:23:16 +00:00
Jonas Devlieghere 2dca65388c [Reproducer] Make 'reproducer generate' a NOOP during replay.
Instead of filtering out the 'reproducer generate' command during
replay, just make the operation a NOOP.

llvm-svn: 355009
2019-02-27 17:47:06 +00:00
Zachary Turner 52f8f34377 Fix some warnings in building LLDB.
Differential Revision: https://reviews.llvm.org/D57413

llvm-svn: 352557
2019-01-29 22:55:21 +00:00