After cf1c774d6ace59c5adc9ab71b31e762c1be695b1, Clang seems to generate code
that is more similar to icc/Clang, so we can use the same line numbers for
all compilers in this test.
Local values are constants or addresses that can't be folded into
the instruction that uses them. FastISel materializes these in a
"local value" area that always dominates the current insertion
point, to try to avoid materializing these values more than once
(per block).
https://reviews.llvm.org/D43093 added code to sink these local
value instructions to their first use, which has two beneficial
effects. One, it is likely to avoid some unnecessary spills and
reloads; two, it allows us to attach the debug location of the
user to the local value instruction. The latter effect can
improve the debugging experience for debuggers with a "set next
statement" feature, such as the Visual Studio debugger and PS4
debugger, because instructions to set up constants for a given
statement will be associated with the appropriate source line.
There are also some constants (primarily addresses) that could be
produced by no-op casts or GEP instructions; the main difference
from "local value" instructions is that these are values from
separate IR instructions, and therefore could have multiple users
across multiple basic blocks. D43093 avoided sinking these, even
though they were emitted to the same "local value" area as the
other instructions. The patch comment for D43093 states:
Local values may also be used by no-op casts, which adds the
register to the RegFixups table. Without reversing the RegFixups
map direction, we don't have enough information to sink these
instructions.
This patch undoes most of D43093, and instead flushes the local
value map after(*) every IR instruction, using that instruction's
debug location. This avoids sometimes incorrect locations used
previously, and emits instructions in a more natural order.
This does mean materialized values are not re-used across IR
instruction boundaries; however, only about 5% of those values
were reused in an experimental self-build of clang.
(*) Actually, just prior to the next instruction. It seems like
it would be cleaner the other way, but I was having trouble
getting that to work.
Differential Revision: https://reviews.llvm.org/D91734
Extend TestProcessConnect to cover the scenario fixed by
6c0cd5676e0a0feaf836e0399023a6e21224467b. This replaces
command-process-connect.test which would fail if port 4321
was open.
Add a 'can_connect' parameter to Process plugin initialization, and use
it to filter plugins to these capable of remote connections. This is
used to prevent 'process connect' from picking up a plugin that can only
be used locally, e.g. the legacy FreeBSD plugin.
Differential Revision: https://reviews.llvm.org/D91810
Restore Linux-alike regset names for AVX/MPX registers
as TestLldbGdbServer seems to depend on them. At the same time, fix
TestRegisters to be aware that they are not available on FreeBSD
and NetBSD, at least until we figure out a better way of reporting
unsupported register sets.
Differential Revision: https://reviews.llvm.org/D91923
Fix qRegisterInfo tests to handle Exx error response when querying
registers that are not supported on the platform in question. This
is how FreeBSD and NetBSD platforms reporting missing registers right
now, and there certainly is value from verifying the remaining
registers.
This change fixes the test for FreeBSD but NetBSD has other regressions
that still need to be researched.
Differential Revision: https://reviews.llvm.org/D91922
Translate between abridged and full ftag values in order to expose
the latter in the gdb-remote protocol while the former are used by
FXSAVE/XSAVE... This matches the gdb behavior.
The Shell/Register tests now rely on the new behavior, and therefore
are run on non-Darwin systems only. The Python (API) test relies
on the legacy behavior, and is run on Darwin only.
Differential Revision: https://reviews.llvm.org/D91504
This extends the "memory region" command to
show tagged regions on AArch64 Linux when the MTE
extension is enabled.
(lldb) memory region the_page
[0x0000fffff7ff8000-0x0000fffff7ff9000) rw-
memory tagging: enabled
This is done by adding an optional "flags" field to
the qMemoryRegion packet. The only supported flag is
"mt" but this can be extended.
This "mt" flag is read from /proc/{pid}/smaps on Linux,
other platforms will leave out the "flags" field.
Where this "mt" flag is received "memory region" will
show that it is enabled. If it is not or the target
doesn't support memory tagging, the line is not shown.
(since majority of the time tagging will not be enabled)
Testing is added for the existing /proc/{pid}/maps
parsing and the new smaps parsing.
Minidump parsing has been updated where needed,
though it only uses maps not smaps.
Target specific tests can be run with QEMU and I have
added MTE flags to the existing helper scripts.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D87442
D91497 changed lldb/test/Shell/Register/x86-fp-write.test and added target-x86_64 to the REQUIRES clause.
It looks this test does not pass on this platform so removing it since it one of tests failing on the
green dragon build bot.
We can handle all the types in the expression evaluator now without casting.
On Linux, we have a system header declaration that is still causing issues, so
I'm skipping the test there until I get around to fix this.
This reverts commit c43abf043692babf9ad4f8bded2fdf6ab9c354b0.
Test commands/register/register/register_command/TestRegisters.py fails.
Buildbot http://lab.llvm.org:8011/#/changes/4149
Translate between abridged and full ftag values in order to expose
the latter in the gdb-remote protocol while the former are used by
FXSAVE/XSAVE... This matches the gdb behavior.
Differential Revision: https://reviews.llvm.org/D91504
The FXSAVE/XSAVE data can have two different layouts on x86_64. When
called as FXSAVE/XSAVE..., the Instruction Pointer and Address Pointer
registers are reported using a 16-bit segment identifier and a 32-bit
offset. When called as FXSAVE64/XSAVE64..., they are reported using
a complete 64-bit offsets instead.
LLDB has historically followed GDB and unconditionally used to assume
the 32-bit layout, with the slight modification of possibly
using a 32-bit segment register (i.e. extending the register into
the reserved 16 upper bits). When the underlying operating system used
FXSAVE64/XSAVE64..., the pointer was split into two halves,
with the upper half repored as the segment registers. While
reconstructing the full address was possible on the user end (and e.g.
the FPU register tests did that), it certainly was not the most
convenient option.
Introduce a two additional 'fip' and 'fdp' registers that overlap
with 'fiseg'/'fioff' and 'foseg'/'foff' respectively, and report
the complete 64-bit address.
Differential Revision: https://reviews.llvm.org/D91497
Depends on D90490.
The stop command is simple and invokes the new method Trace::StopTracingThread(thread).
On the other hand, the start command works by delegating its implementation to a CommandObject provided by the Trace plugin. This is necessary because each trace plugin needs different options for this command. There's even the chance that a Trace plugin can't support live tracing, but instead supports offline decoding and analysis, which means that "thread trace dump instructions" works but "thread trace start" doest. Because of this and a few other reasons, it's better to have each plugin provide this implementation.
Besides, I'm using the GetSupportedTraceType method introduced in D90490 to quickly infer what's the trace plug-in that works for the current process.
As an implementation note, I moved CommandObjectIterateOverThreads to its header so that I can use it from the IntelPT plugin. Besides, the actual start and stop logic for intel-pt is not part of this diff.
Reviewed By: clayborg
Differential Revision: https://reviews.llvm.org/D90729
init_llgs_test no longer takes an argument
but these two were not updated.
Also fix some mistakes in TestAutoInstallMainExecutable
to get it passing again.
Reviewed By: JDevlieghere, labath
Differential Revision: https://reviews.llvm.org/D91612
Add a parser for JSON crashlogs. The CrashLogParser now defers to either
the JSONCrashLogParser or the TextCrashLogParser. It first tries to
interpret the input as JSON, and if that fails falling back to the
textual parser.
Differential revision: https://reviews.llvm.org/D91130
LLDB is currently always activating C++ when parsing expressions as LLDB itself
is using C++ features when creating the final AST that will be codegen'd
(specifically, references to variables, namespaces and using declarations are
used).
This is causing problems for users that have variables in non-C++ programs (e.g.
plain C or Objective-C) that have names which are keywords in C++. Expressions
referencing those variables fail to parse as LLDB's Clang parser thinks those
identifiers are C++ keywords and not identifiers that may belong to a
declaration.
We can't just disable C++ in the expression parser for those situations as
replacing the functionality of the injected C++ code isn't trivial. So this
patch is just disabling most keywords that are exclusive to C++ in LLDB's Clang
parser when we are in a non-C++ expression. There are a few keywords we can't
disable for now:
* `using` as that's currently used in some situations to inject variables into the expression function.
* `__null` as that's used by LLDB to define `NULL`/`Nil`/`nil`.
Getting rid of these last two keywords is possible but is a large enough change
that this will be handled in follow up patches.
Note that this only changes the keyword status of those tokens but this patch
does not remove any C++ functionality from the expression parser. The type
system still follows C++ rules and so does the rest of the expression parser.
There is another small change that gives the hardcoded macro definitions in LLDB
a higher precedence than the macros imported from the Objective-C modules. The
reason for this is that the Objective-C modules in LLDB are actually parsed in
Objective-C++ mode and they end up providing the C++ definitions of certain
system macros (like `NULL` being defined as `nullptr`). So we have to move the
LLDB definition forward and surround the definition from the module with an
`#ifdef` to make sure that we use the correct LLDB definition that doesn't
reference C++ keywords. Or to give an example, this is how the expression source
code changes:
Before:
```
#define NULL (nullptr) // injected module definition
#ifndef NULL
#define NULL (__null) // hardcoded LLDB definition
#endif
```
After:
```
#ifndef NULL
#define NULL (__null) // hardcoded LLDB definition
#endif
#ifndef NULL
#define NULL (nullptr) // injected module definition
#endif
```
Fixes rdar://10356912
Reviewed By: shafik
Differential Revision: https://reviews.llvm.org/D82770
I think the check for whether the process is connected is totally bogus
in the first place, but on the off-chance that's it's not, we should
behave the same in synchronous and asynchronous mode.
"[lldb/DataFormatters] Display null C++ pointers as nullptr" added an assumption
that the member we check for is always a nullptr, but it is actually never
initialized. That causes the test to randomly fail due to the pointer having
some random value that isn't 0.
On x86_64, when you hit a __builtin_debugtrap instruction, you
can continue past this in the debugger. This patch has debugserver
recognize the specific instruction used for __builtin_debugtrap
and advance the pc past it, so that the user can continue execution
once they've hit one of these.
In the patch discussion, we were in agreement that it would be better
to have this knowledge up in lldb instead of depending on each
stub rewriting the pc behind the debugger's back, but that's a
larger scale change for another day.
<rdar://problem/65521634>
Differential revision: https://reviews.llvm.org/D91238
Display null pointer as `nullptr`, `nil` and `NULL` for C++,
Objective-C/Objective-C++ and C respectively. The original motivation
for this patch was to display a null std::string pointer as nullptr
instead of "", but the fix seemed generic enough to be done for all
summary providers.
Differential revision: https://reviews.llvm.org/D77153
When parsing DWARF and laying out bit-fields we don't properly take into account when they are in a union, they will all have a zero offset.
Differential Revision: https://reviews.llvm.org/D91118
When I added TestAbortExitCode I actually planned this to be a generic test for the
exit code functionality on POSIX systems. However due to all the different test setups we
can have I don't think this worked out. Right now the test had to be made so permissive
that it pretty much can't fail.
Just to summarize, we would need to support the following situations:
1. ToT debugserver (on macOS)
2. lldb-server (on other platforms)
3. Any old debugserver version when using the system debugserver (on macOS)
This patch is removing TestAbortExitCode and adds a ToT debugserver specific test
that checks the patch that motivated the whole exit code testing. There is already
an exit-code test for lldb-server from what I can see and 3) is pretty much untestable
as we don't know anything about the system debugserver.
Reviewed By: kastiglione
Differential Revision: https://reviews.llvm.org/D89305
This adds `expect_var_path` to test variable paths so we no longer have to
use `frame var` and find substrs in the command output. The behaviour
is identical with `expect_expr` (and it also uses the same checking backend),
but it instead calls `GetValueForVariablePath` to evaluate the string as a variable
path.
Also rewrites a few of the tests that previously used `frame variable` to use
`expect_var_path`.
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D90450
Add a test verifying that after the 'watchpoint' command, new values
of x86 debug registers can be read back correctly. The primary purpose
of this test is to catch broken DRn reading and help debugging it.
Differential Revision: https://reviews.llvm.org/D91264
Commit 5f12f4ff9078455cad9d4806da01f570553a5bf9 made suppressing inline namespaces
when printing typenames default to true. As we're using the inline namespaces
in LLDB to construct internal type names (which need internal namespaces in them
to, for example, differentiate libc++'s std::__1::string from the std::string
from libstdc++), this broke most of the type formatting logic.
Following discussion in D91193, a change made in D88792 was not quite right.
This restores the message argument, and switches from `expect` to `runCmd`.
Differential Revision: https://reviews.llvm.org/D91206
Those two decorators have identical behaviour. This removes
`not_remote_testsuite_ready` as `skipIfRemote` seems more consistent with the
other decorator names we have
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D89376
Copy the recent improvements from the FreeBSDRemote plugin, notably:
- moving event reporting setup into SetupTrace() helper
- adding more debug info into SIGTRAP handling
- handling user-generated (and unknown) SIGTRAP events
- adding missing error handling to the generic signal handler
- fixing attaching to processes
- switching watchpoint helpers to use llvm::Error
- minor style and formatting changes
This fixes a number of tests, mostly related to fixed attaching.
Differential Revision: https://reviews.llvm.org/D91167
