Support registering multiple callbacks for a single signal. This is
necessary to support multiple co-existing native process instances, with
separate SIGCHLD handlers.
The system signal handler is registered on first request, additional
callback are added on subsequent requests. The system signal handler
is removed when last callback is unregistered.
Differential Revision: https://reviews.llvm.org/D100418
This test seems to be broken there (which is not totally surprising as
this functionality was never used on windows). Disable the test while I
investigate.
- s/createUniqueFile/createUniquePath -- we don't want to create the file,
just the file name
- s/data()/str().c_str()/ -- paths given to system apis must be
null-terminated
When running in an ipv6-only environment where `AF_INET` sockets are not available, many lldb tests (mostly gdb remote tests) fail because things like `127.0.0.1` don't work there.
Use `localhost` instead of `127.0.0.1` whenever possible, or include a fallback of creating `AF_INET6` sockets when `AF_INET` fails.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D87333
When debugging a remote platform, the platform you get from
GetPlatformForArchitecture doesn't inherit from PlatformDarwin.
HostInfoMacOSX seems like the right place to have a global store of
local paths.
Differential Revision: https://reviews.llvm.org/D79364
Sadly IPv6 is still not present anywhere. The test was attempting to
detect&skip such hosts, but the way it did that (essentially, by calling
getaddrinfo) meant that it only detected hosts which have IPv6 support
completely compiled out. It did not do anything about hosts which have
it compiled in, but lack runtime configuration even for the ::1 loopback
address.
This patch changes the detection logic to use a new method. It does it
by attempting to bind a socket to the appropriate loopback address. That
should ensure the hosts loopback interface is fully set up. In an effort
to avoid silently skipping the test on too many hosts, the test is
fairly strict about the kind of error it expects in these cases -- it
will only skip the test when receiving EADDRNOTAVAIL. If we find other
error codes that can be reasonably returned in these situations, we can
add more of them.
The (small) change in TCPSocket.cpp is to ensure that the code correctly
propagates the error received from the OS.
For developing the OS itself there exists an "internal" variant of
each SDK. This patch adds support for these SDK directories to the
XcodeSDK class.
Differential Revision: https://reviews.llvm.org/D78675
LLDB relies on empty FileSpecs being invalid files, for example, they
don't exists. Currently this assumption does not always hold during
reproducer replay, because we pass the result of GetPath to the VFS.
This is an empty string, which the VFS converts to an absolute directory
by prepending the current working directory, before looking it up in the
YAML mapping. This means that an empty FileSpec will exist when the
current working directory does. This breaks at least one test
(TestAddDsymCommand.py) when ran from replay.
This patch special cases empty FileSpecs and returns a sensible result
before calling GetPath and forwarding the call.
Differential revision: https://reviews.llvm.org/D77351
This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.
This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.
This doesn't actually modify StringRef yet, I'll do that in a follow-up.
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
Summary:
Many of our tests need to initialize certain subsystems/plugins of LLDB such as
`FileSystem` or `HostInfo` by calling their static `Initialize` functions before the
test starts and then calling `::Terminate` after the test is done (in reverse order).
This adds a lot of error-prone boilerplate code to our testing code.
This patch adds a RAII called SubsystemRAII that ensures that we always call
::Initialize and then call ::Terminate after the test is done (and that the Terminate
calls are always in the reverse order of the ::Initialize calls). It also gets rid of
all of the boilerplate that we had for these calls.
Per-fixture initialization is still not very nice with this approach as it would
require some kind of static unique_ptr that gets manually assigned/reseted
from the gtest SetUpTestCase/TearDownTestCase functions. Because of that
I changed all per-fixture setup to now do per-test setup which can be done
by just having the SubsystemRAII as a member of the test fixture. This change doesn't
influence our normal test runtime as LIT anyway runs each test case separately
(and the Initialize/Terminate calls are anyway not very expensive). It will however
make running all tests in a single executable slightly slower.
Reviewers: labath, JDevlieghere, martong, espindola, shafik
Reviewed By: labath
Subscribers: mgorny, rnkovacs, emaste, MaskRay, abidh, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D71630
Summary:
This patch factors out File as an abstract base
class and moves most of its actual functionality into
a subclass called NativeFile. In the next patch,
I'm going to be adding subclasses of File that
don't necessarily have any connection to actual OS files,
so they will not inherit from NativeFile.
This patch was split out as a prerequisite for
https://reviews.llvm.org/D68188
Reviewers: JDevlieghere, jasonmolenda, labath
Reviewed By: labath
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D68317
llvm-svn: 373564
Summary:
This patch converts FileSystem::Open from this prototype:
Status
Open(File &File, const FileSpec &file_spec, ...);
to this one:
llvm::Expected<std::unique_ptr<File>>
Open(const FileSpec &file_spec, ...);
This is beneficial on its own, as llvm::Expected is a more modern
and recommended error type than Status. It is also a necessary step
towards https://reviews.llvm.org/D67891, and further developments
for lldb_private::File.
Reviewers: JDevlieghere, jasonmolenda, labath
Reviewed By: labath
Subscribers: mgorny, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D67996
llvm-svn: 373003
Adrian added a sanity check to the socket tests to ensure the $TMPDIR is
not too long for a socket. While this is great for diagnosing the
problem it doesn't really solve the problem for environment where you
have no control over that variable such as in CI. I propose to just skip
the test in that case similar to what we do for tests that rely on
targets that are not currently build, etc.
Differential revision: https://reviews.llvm.org/D67972
llvm-svn: 372774
lvm_private::File::GetStream() can fail if m_options == 0
It's not clear from the header a File created with a descriptor will be
not be usable by many parts of LLDB unless SetOptions is also called,
but it is.
This is because those parts of LLDB rely on GetStream() to use the
file, and that in turn relies on calling fdopen on the descriptor. When
calling fdopen, GetStream relies on m_options to determine the access
mode. If m_options has never been set, GetStream() will fail.
This patch adds options as a required argument to File::SetDescriptor
and the corresponding constructor.
Patch by: Lawrence D'Anna
Differential revision: https://reviews.llvm.org/D67792
llvm-svn: 372652
If the file has m_stream, it may not have a m_descriptor.
GetWaitableHandle() should call GetDescriptor(), which will call
fileno(), so it will get waitable descriptor whenever one is available.
Patch by: Lawrence D'Anna
Differential revision: https://reviews.llvm.org/D67789
llvm-svn: 372644
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
Differential revision: https://reviews.llvm.org/D66259
llvm-svn: 368933
This patch replaces explicit calls to log::Printf with the new LLDB_LOGF
macro. The macro is similar to LLDB_LOG but supports printf-style format
strings, instead of formatv-style format strings.
So instead of writing:
if (log)
log->Printf("%s\n", str);
You'd write:
LLDB_LOG(log, "%s\n", str);
This change was done mechanically with the command below. I replaced the
spurious if-checks with vim, since I know how to do multi-line
replacements with it.
find . -type f -name '*.cpp' -exec \
sed -i '' -E 's/log->Printf\(/LLDB_LOGF\(log, /g' "{}" +
Differential revision: https://reviews.llvm.org/D65128
llvm-svn: 366936
Summary:
This is the fifth patch to improve module loading in a series that started here (where I explain the motivation and solution): D62499
Reading strings with ReadMemory is really slow when reading the path of the shared library. This is because we don't know the length of the path so use PATH_MAX (4096) and these strings are actually super close to the boundary of an unreadable page. So even though we use process_vm_readv it will usually fail because the read size spans to the unreadable page and we then default to read the string word by word with ptrace.
This new function is very similar to another ReadCStringFromMemory that already exists in lldb that makes sure it never reads cross page boundaries and checks if we already read the entire string by finding '\0'.
I was able to reduce the GetLoadedSharedLibraries call from 30ms to 4ms (or something of that order).
Reviewers: clayborg, xiaobai, labath
Reviewed By: labath
Subscribers: emaste, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D62503
llvm-svn: 363750
Summary:
This is the third patch to improve module loading in a series that started here (where I explain the motivation and solution): D62499
Add functions to read the r_debug location to know where the linked list of loaded libraries are so I can generate the `xfer:libraries-svr4` packet.
I'm also using this function to implement `GetSharedLibraryInfoAddress` that was "not implemented" for linux.
Most of this code was inspired by the current ds2 implementation here: https://github.com/facebook/ds2/blob/master/Sources/Target/POSIX/ELFProcess.cpp.
Reviewers: clayborg, xiaobai, labath
Reviewed By: clayborg, labath
Subscribers: emaste, krytarowski, mgorny, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D62501
llvm-svn: 363458
Summary:
My main goal here is to make lldb-server work with Android Studio.
This is currently not the case because lldb-server is started in platform mode listening on a domain socket. When Android Studio connects to it lldb-server crashes because even though it's listening on a domain socket as soon as it gets a connection it asserts that it's a TCP connection, which will obviously fails for any non-tcp connection.
To do this I came up with a new method called GetConnectURI() in Socket that returns the URI needed to connect to the connected portion of the socket.
Reviewers: labath, clayborg, xiaobai
Reviewed By: labath
Subscribers: mgorny, jfb, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D62089
llvm-svn: 362173
Summary:
This is a general fix for the ConnectionFileDescriptor class but my main motivation was to make lldb-server working with IPv6.
The connect URI can use square brackets ([]) to wrap the interface part of the URI (e.g.: <scheme>://[<interface>]:<port>). For IPv6 addresses this is a must since its ip can include colons and it will overlap with the port colon otherwise. The URIParser class parses the square brackets correctly but the ConnectionFileDescriptor doesn't generate them for IPv6 addresses making it impossible to connect to the gdb server when using this protocol.
How to reproduce the issue:
```
$ lldb-server p --server --listen [::1]:8080
...
$ lldb
(lldb) platform select remote-macosx
(lldb) platform connect connect://[::1]:8080
(lldb) platform process -p <pid>
error: unable to launch a GDB server on 'computer'
```
The server was actually launched we were just not able to connect to it. With this fix lldb will correctly connect. I fixed this by wrapping the ip portion with [].
Reviewers: labath
Reviewed By: labath
Subscribers: xiaobai, mgorny, jfb, lldb-commits, labath
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D61833
llvm-svn: 361898
This reverts commit c28f81797084b8416ff5be4f9e79000a9741ca6a.
This reverts commit 7e79b64642486f510f7872174eb831df68d65b84.
Looks like there is more work to be done on this patch. I've spoken to
the author and for the time being we will revert to keep the buildbots
green.
llvm-svn: 361086
This is a general fix for the ConnectionFileDescriptor class but my main
motivation was to make lldb-server working with IPv6.
The connect URI can use square brackets ([]) to wrap the interface part
of the URI (e.g.: <scheme>://[<interface>]:<port>). For IPv6 addresses
this is a must since its ip can include colons and it will overlap with
the port colon otherwise. The URIParser class parses the square brackets
correctly but the ConnectionFileDescriptor doesn't generate them for
IPv6 addresses making it impossible to connect to the gdb server when
using this protocol.
How to reproduce the issue:
$ lldb-server p --server --listen [::1]:8080
...
$ lldb
(lldb) platform select remote-macosx
(lldb) platform connect connect://[::1]:8080
(lldb) platform process -p <pid>
error: unable to launch a GDB server on 'computer'
The server was actually launched we were just not able to connect to it.
With this fix lldb will correctly connect. I fixed this by wrapping the
ip portion with [].
Differential Revision: https://reviews.llvm.org/D61833
Patch by António Afonso <antonio.afonso@gmail.com>
llvm-svn: 361079
LLVM's wchar to UTF8 conversion routine expects an empty string to store the output.
GetHostName() on Windows is sometimes called with a non-empty string which triggers
an assert. The simple fix is to clear the output string before the conversion.
llvm-svn: 358550
There are set of classes in Target that describe the parameters of a
process - e.g. it's PID, name, user id, and similar. However, since it
is a bare description of a process and contains no actual functionality,
there's nothing specifically that makes this appropriate for being in
Target -- it could just as well be describing a process on the host, or
some hypothetical virtual process that doesn't even exist.
To cement this, I'm moving these classes to Utility. It's possible that
we can find a better place for it in the future, but as it is neither
Host specific nor Target specific, Utility seems like the most appropriate
place for the time being.
After this there is only 2 remaining references to Target from Host,
which I'll address in a followup.
Differential Revision: https://reviews.llvm.org/D58842
llvm-svn: 355342
Given that we have a target named Symbols, one wonders why a
file named Symbols.cpp is not in this target. To be clear,
the functions exposed from this file are really focused on
*locating* a symbol file on a given host, which is where the
ambiguity comes in. However, it makes more sense conceptually
to be in the Symbols target. While some of the specific places
to search for symbol files might change depending on the Host,
this is not inherently true in the same way that, for example,
"accessing the file system" or "starting threads" is
fundamentally dependent on the Host.
PDBs, for example, recently became a reality on non-Windows platforms,
and it's theoretically possible that DSYMs could become a thing on non
MacOSX platforms (maybe in a remote debugging scenario). Other types of
symbol files, such as DWO, DWP, etc have never been tied to any Host
platform anyway.
After this patch, there is only one remaining dependency from
Host to Target.
Differential Revision: https://reviews.llvm.org/D58730
llvm-svn: 355032
Host had a function to get the UnixSignals instance corresponding
to the current host architecture. This means that Host had to
include a file from Target. To break this dependency, just make
this a static function directly in UnixSignals. We already have
the function UnixSignals::Create(ArchSpec) anyway, so we just
need to have UnixSignals::CreateForHost() which determines which
value to pass for the ArchSpec.
The goal here is to eventually break the Host->Target->Host
circular dependency.
Differential Revision: https://reviews.llvm.org/D57780
llvm-svn: 354168
Add missing EINTR handling for kevent() calls. If the call is
interrupted, return from Poll() as if zero events were returned and let
the polling resume on next iteration. This fixes test flakiness
on NetBSD.
Includes a test case suggested by Pavel Labath on D42206.
Differential Revision: https://reviews.llvm.org/D58230
llvm-svn: 354122
Fix the tests not to use '127.0.0.1' and 'localhost' interchangeably.
More specifically, since tests bind specifically to 127.0.0.1, connect
to that address as well; using 'localhost' can resolve to IPv6 address
which can cause issues -- for example, if the matching port happens to
be used by some other process, the tests hang forever waiting for
the client to connect.
While technically the case of randomly selected IPv4 port being taken
on IPv6 loopback is not very likely, NetBSD happens to be suffering from
some weird kernel issue where connection to that port succeeds
nevertheless. Until we can really figure out what goes wrong there,
this saves us from the tests hanging randomly.
Differential Revision: https://reviews.llvm.org/D58131
llvm-svn: 353868
The NetBSD kernel currently does not support detecting closed slave pty
via kevent on master pty. This causes the test to hang forever.
To avoid that, disable the test until the kernel is fixed.
Differential Revision: https://reviews.llvm.org/D57912
llvm-svn: 353545
Benjamin Kramer