Summary:
It uses the new ability of ABI plugins to vend llvm::MCRegisterInfo
structs (which is what is needed to turn dwarf register numbers into
strings).
Reviewers: JDevlieghere, aprantl, jasonmolenda
Subscribers: tatyana-krasnukha, lldb-commits
Differential Revision: https://reviews.llvm.org/D67966
llvm-svn: 373208
The VFS requires files to be have absolute paths. The file collector
makes paths relative to the reproducer root. If the root is a relative
path, this would trigger an assert in the VFS. This patch ensures that
we always make the given path absolute.
Thank you Ted Woodward for pointing this out!
llvm-svn: 373102
Summary:
Windows unwinding is weird. The unwind rules do not (always) describe
the precise layout of the stack, but rather expect the debugger to scan
the stack for something which looks like a plausible return address, and
the unwind based on that. The reason this works somewhat reliably is
because the the unwinder also has access to the frame sizes of the
functions on the stack. This allows it (in most cases) to skip function
pointers in local variables or function arguments, which could otherwise
be mistaken for return addresses.
Implementing this kind of unwind mechanism in lldb was a bit challenging
because we expect to be able to statically describe (in the UnwindPlan)
structure, the layout of the stack for any given instruction. Giving a
precise desription of this is not possible, because it requires
correlating information from two functions -- the pushed arguments to a
function are considered a part of the callers stack frame, and their
size needs to be considered when unwinding the caller, but they are only
present in the unwind entry of the callee. The callee may end up being
in a completely different module, or it may not even be possible to
determine it statically (indirect calls).
This patch implements this functionality by introducing a couple of new
APIs:
SymbolFile::GetParameterStackSize - return the amount of stack space
taken up by parameters of this function.
SymbolFile::GetOwnFrameSize - the size of this function's frame. This
excludes the parameters, but includes stuff like local variables and
spilled registers.
These functions are then used by the unwinder to compute the estimated
location of the return address. This address is not always exact,
because the stack may contain some additional values -- for instance, if
we're getting ready to call a function then the stack will also contain
partially set up arguments, but we will not know their size because we
haven't called the function yet. For this reason the unwinder will crawl
up the stack from the return address position, and look for something
that looks like a possible return address. Currently, we assume that
something is a valid return address if it ends up pointing to an
executable section.
All of this logic kicks in when the UnwindPlan sets the value of CFA as
"isHeuristicallyDetected", which is also the final new API here. Right
now, only SymbolFileBreakpad implements these APIs, but in the future
SymbolFilePDB will use them too.
Differential Revision: https://reviews.llvm.org/D66638
llvm-svn: 373072
When all the tests run by dotest are unsupported, it still reports
RESULT: PASSED which we translate to success for lit. We can better
report the status as unsupported when we see that there are unsupported
tests but no passing tests. This will not affect the situation where
there are failures or unexpected passes, because those report a non-zero
exit code.
Differential revision: https://reviews.llvm.org/D68039
llvm-svn: 372914
Add a test case for the change from SVN r372657, and for the
preexisting ARM identification.
Add a missing ArchDefinitionEntry for PECOFF/arm64, and tweak
the ArmNt case to set the architecture to armv7 (ArmNt never ran
on anything lower than that). (This avoids a case where
ArchSpec::MergeFrom would override the arch from arm to armv7 and
ArchSpec::CoreUpdated would reset the OS to unknown at the same time.)
Differential Revision: https://reviews.llvm.org/D67951
llvm-svn: 372741
These can appear in a different order depending on the relative
layout of the source and build trees.
Differential Revision: https://reviews.llvm.org/D67953
llvm-svn: 372740
The test was expecting the value of "lldb.frame" to be None, because it
is cleared after each python interpreter session. However, this is not
true in the very first session, because lldb.py sets these values to
invalid objects (lldb.SBFrame(), etc.).
I have not investigated why is it that this test passes on darwin, but
my guess is that this is because we do extra work on darwin (loading the
objc runtime, etc), which causes us to enter the python interpreter
sooner.
This patch changes lldb.py to also initialize these values to None, as
that seems to make more sense. I also fixed some typos in the test while
I was in there.
llvm-svn: 372222
Summary:
The `CHECK: frame:py: None` seems to have been a typo, causing build bot failures:
```
# CHECK: frame:py: None
^
<stdin>:1:1: note: scanning from here
(lldb) command source -s 0 'E:/build_slave/lldb-x64-windows-ninja/build/tools/lldb\lit\lit-lldb-init'
^
<stdin>:23:1: note: possible intended match here
frame:py: No value
^
```
This update fixes the build bots.
--
Reviewers: bkramer
Reviewed By: bkramer
Differential Revision: https://reviews.llvm.org/D67702
llvm-svn: 372221
Jim pointed out that the LLDB global variables should only be available
in interactive mode. When used from a command for example, their values
might be stale or not at all what the user expects. Therefore we want to
explicitly make these variables unavailable.
Differential revision: https://reviews.llvm.org/D67685
llvm-svn: 372192
Summary:
This makes the input file for a new test added in r372060 directly
available in the Inputs subdirectory of the test dir.
Differential Revision: https://reviews.llvm.org/D67655
llvm-svn: 372112
The LoadScriptingModule used by command script import wasn't
initializing the LLDB global variables (things like `lldb.frame` and
`lldb.debugger`). They would get initialized however when running the
interactive script interpreter or running a single script line (e.g.
`script print(lldb.frame)`). This patch fixes that by properly
initializing the globals when loading a Python module.
Differential revision: https://reviews.llvm.org/D67644
llvm-svn: 372060
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
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
Summary:
This change ensures that the .dynsym section will be parsed even when there's already is a .symtab.
It is motivated because of minidebuginfo (https://sourceware.org/gdb/current/onlinedocs/gdb/MiniDebugInfo.html#MiniDebugInfo).
There it says:
Keep all the function symbols not already in the dynamic symbol table.
That means the .symtab embedded inside the .gnu_debugdata does NOT contain the symbols from .dynsym. But in order to put a breakpoint on all symbols we need to load both. I hope this makes sense.
My other patch D66791 implements support for minidebuginfo, that's why I need this change.
Reviewers: labath, espindola, alexshap
Subscribers: JDevlieghere, emaste, arichardson, MaskRay, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D67390
llvm-svn: 371599
Modifying the interpreter settings is tricky because they don't take
effect until we create a new command interpreter, which should be merely
an implementation detail. This leads to confusing and unexpected
scenarios.
This adds a test cases with FIXMEs for some of the odd scenarios I
encountered. I didn't XFAIL the test because I don't think there's a way
to get an unexpected PASS if any of the commands succeeds and splitting
up the file in multiple tests seems excessive.
llvm-svn: 371259
On more than one occasion I've found this test got stuck during replay
while waiting for a packet from debugserver when the debugger was in the
process of being destroyed. For some reason it's more prevalent on the
downstream Swift fork. Adding a cont mitigates the problem while I
investigate.
llvm-svn: 371144
Summary:
This patch makes it possible to unwind via breakpad STACK WIN records.
It is "basic" because two important features are missing:
- support for the .raSearch keyword
- support for multiple STACK WIN records within a single function
Right now, we just reject the .raSearch records, and always pick the
first record for the whole function
SymbolFileBreakpad, and so I think it can serve as a good example of
what is needed of the symbol file and unwinding machinery to make this
work.
However, it is already useful for unwinding in some situations, and it
sets up the general framework for the parsing of these kinds of records,
which reduces the size of the followup patches implementing the two
other components.
Reviewers: amccarth, rnk, markmentovai
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D67067
llvm-svn: 371017
We were printing the start_addr field, which is not correct, as in this
branch we are processing the memory described by cur_range. Print that
instead.
Ideally, in particular this case, the error message would also say
something about not being able to disassemble due to not having found
the module from the core file, but that is not easy to do right now, so
I'm leaving that for another time.
llvm-svn: 370898
In r370135 I committed a temporary workaround for the sanitized bot to
not set (DY)LD_LIBRARY_PATH when (DY)LD_INSERT_LIBRARIES was set.
Setting (DY)LD_LIBRARY_PATH is only necessary for (standalone)
shared-library builds, so a better solution is to only set the
environment variable when necessary.
Differential revision: https://reviews.llvm.org/D67012
llvm-svn: 370549
My follow-up commit to mess with DYLD_LIBRARY_PATH was bogus for two
reasons:
- The condition was inverted.
- We were checking the OS's environment, instead of the config's.
Two wrongs don't make a right, but the second mistake meant that the
sanitizer bot passed.
llvm-svn: 370483
A test is marked unresolved when we're unable to find PASSED or FAILED
in the dotest output. Usually this is because we crashed and when that
happens the exit code can give a clue as to why. This patch adds the
exit code to the lit output to make it easier to investigate those
issues.
Differential revision: https://reviews.llvm.org/D66975
llvm-svn: 370413
Currently, lit tests don't set neither the module cache for building
inferiors nor the module cache used by lldb when running tests.
Furthermore, we have several places where we rely on the path to the
module cache being always the same, rather than passing the correct
value around. This makes it hard to specify a different module cache
path when debugging a a test.
This patch reworks how we determine and pass around the module cache
paths and fixes the omission on the lit side. It also adds a sanity
check to the lit and dotest suites.
Differential revision: https://reviews.llvm.org/D66966
llvm-svn: 370394
Summary:
The only reason for this function's existance is so that we could pass
the correct size into the DWARFExpression constructor. However, there is
no harm in passing the entire data extractor into the DWARFExpression,
since the same code is performing the size determination as well as the
subsequent parse. So, if we get malformed input or there's a bug in the
parser, we'd compute the wrong size anyway.
Additionally, reducing the number of entry points into the location list
parsing machinery makes it easier to switch the llvm debug_loc(lists)
parsers.
While inside, I added a couple of tests for invalid location list
handling.
Reviewers: JDevlieghere, clayborg
Subscribers: aprantl, javed.absar, kristof.beyls, lldb-commits
Differential Revision: https://reviews.llvm.org/D66789
llvm-svn: 370373
This patch removes the -q (quiet) flag and changing the default
behavior. Currently the flag serves two purposes that are somewhat
contradictory, as illustrated by the difference between the argument
name (quiet) and the configuration flag (parsable). On the one hand it
reduces output, but on the other hand it prints more output, like the
result of individual tests. My proposal is to guard the extra output
behind the verbose flag and always print the individual test results.
Differential revision: https://reviews.llvm.org/D66837
llvm-svn: 370226
Setting DYLD_INSERT_LIBRARIES to the Asan runtime and DYLD_LIBRARY_PATH
to the LLVM shared library dir causes the test suite to crash with a
segfault. We see this on the LLDB sanitized bot [1] on GreenDragon. I've
spent some time investigating, but I'm not sure what's going on (yet).
Originally I thought this was because we were building compiler-rt and
were loading an incompatible, just-built Asan library. However, the
issue persists even without compiler-rt. It doesn't look like the Asan
runtime is opening any other libraries that might be found in LLVM's
shared library dir and talking to the team confirms that. Another
possible explanation is that we're loading lldb form a place we don't
expect, but that doesn't make sense either, because DYLD_LIBRARY_PATH is
always set without the crash. I tried different Python versions and
interpreters but the issue persist.
As a (temporary?) workaround I propose not setting DYLD_LIBRARY_PATH
when DYLD_INSERT_LIBRARIES is set so we can turn the Asan bot on again
and get useful results.
[1] http://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake-sanitized/
Differential revision: https://reviews.llvm.org/D66845
llvm-svn: 370135
On macOS one Mach-O slice can contain multiple load commands: One load
command for being loaded into a macOS process and one load command for
being loaded into a macCatalyst process. This patch adds support for
the new load command and makes sure ObjectFileMachO returns the
Architecture that matches the Module.
Differential Revision: https://reviews.llvm.org/D66626
llvm-svn: 369814
This patch is also motivated by the Swift branch and is effectively NFC for the single-TypeSystem llvm.org branch.
In multi-language projects it is extremely common to have, e.g., a
Clang type and a similarly-named rendition of that same type in
another language. When searching for a type It is much cheaper to pass
a set of supported languages to the SymbolFile than having it
materialize every result and then rejecting the materialized types
that have the wrong language.
Differential Revision: https://reviews.llvm.org/D66546
<rdar://problem/54471165>
This reapplies r369690 with a previously missing constructor for LanguageSet.
llvm-svn: 369710
This patch is also motivated by the Swift branch and is effectively NFC for the single-TypeSystem llvm.org branch.
In multi-language projects it is extremely common to have, e.g., a
Clang type and a similarly-named rendition of that same type in
another language. When searching for a type It is much cheaper to pass
a set of supported languages to the SymbolFile than having it
materialize every result and then rejecting the materialized types
that have the wrong language.
Differential Revision: https://reviews.llvm.org/D66546
<rdar://problem/54471165>
llvm-svn: 369690
This patch generalizes the FindTypes with CompilerContext interface to
support looking up a type of unknown kind by name, as well as looking
up a type inside an unspecified submodule. These features are
motivated by the Swift branch, but are fully tested via unit tests and
lldb-test on llvm.org. Specifically, this patch adds an AnyModule and
an AnyType CompilerContext kind.
Differential Revision: https://reviews.llvm.org/D66507
rdar://problem/54471165
llvm-svn: 369555
This recommits r368416, which was reverted in r368838 because of test
failures under ASAN. These have been dealt with by llvm r369370.
The original commit message was:
When opening a minidump, we were failing to find an executable because
we were searching for i386-unknown-windows, whereas we recognize the
pe/coff files as i386-pc-windows. This fixes the triple computation code
in the minidump parser to match pe/coff, and adds an appropriate test.
NB: I'm not sure setting the vendor to "pc" is really correct for
arm(64) windows, but right now that seems to match what we do in the
pe/coff case (ArchSpec.cpp:935).
Reviewers: clayborg, amccarth
Subscribers: javed.absar, kristof.beyls, rnk, markmentovai, lldb-commits
Differential Revision: https://reviews.llvm.org/D65955
llvm-svn: 369523
This adds a -compiler-context=<...> option to lldb-test that trakes a
comma-separated string that is a list of kind/name pairs and
translates it into a std::vector<CompilerContext>, a CompilerContext
being a pair of context-kind and name.
Differential Revision: https://reviews.llvm.org/D66453
<rdar://problem/54471165>
llvm-svn: 369407
Although there is nothing wrong with this patch, the test added here
uncovers a problem in other parts of the code which cause the test to
fail when running under asan. Reverting the patch until I can fix the
underlying issue(s).
This reverts commit r368416.
llvm-svn: 368838
Summary:
When opening a minidump, we were failing to find an executable because
we were searching for i386-unknown-windows, whereas we recognize the
pe/coff files as i386-pc-windows. This fixes the triple computation code
in the minidump parser to match pe/coff, and adds an appropriate test.
NB: I'm not sure setting the vendor to "pc" is really correct for
arm(64) windows, but right now that seems to match what we do in the
pe/coff case (ArchSpec.cpp:935).
Reviewers: clayborg, amccarth
Subscribers: javed.absar, kristof.beyls, rnk, markmentovai, lldb-commits
Differential Revision: https://reviews.llvm.org/D65955
llvm-svn: 368416
When ld64 links a binary deterministically using the flag ZERO_AR_DATE,
it sets a timestamp of 0 for N_OSO members in the symtab section, rather
than the usual last modified date of the object file. Prior to this
patch, lldb would compare the timestamp from the N_OSO member against
the last modified date of the object file, and skip loading the object
file if there was a mismatch. This patch updates the logic to ignore the
timestamp check if the N_OSO member has timestamp 0.
The original logic was added in https://reviews.llvm.org/rL181631 as a
safety check to avoid problems when debugging if the object file was out
of date. This was prior to the introduction of deterministic build in
ld64. lld still doesn't support deterministic build.
Other code in llvm already relies on and uses the assumption that a
timestamp of 0 means deterministic build. For example, commit
9ccfddc39d adds similar timestamp checking
logic to dsymutil, but special cases timestamp 0. Likewise, commit
0d1bb79a04 adds a long comment describing
deterministic archive, which mostly uses timestamp 0 for determinism.
Patch from Erik Chen <erikchen@chromium.org>!
Differential Revision: https://reviews.llvm.org/D65826
llvm-svn: 368199
Resolve the path in the target create output. This is nice when passing
relative paths to the lldb command line driver.
$ lldb ./binary
(lldb) target create "./binary"
Current executable set to '/absolute/path/to/binary' (x86_64).
This change only affects the target create output and does not change
the debugger's behavior. It doesn't resolve symbolic links so it won't
cause confusing when debugging something like clang++ that's symlinked
to clang.
Differential revision: https://reviews.llvm.org/D65611
llvm-svn: 368182
Summary:
While removing -z separate-code makes lld produce place the code at the
end of a segment right now, it's possible that future changes to the
linker will change that, thereby removing the coverage for the changes
in r367983. This patch adds a linker script to one of the line table
tests, which ensures that the code (and its line table) will be placed
at the very end of a module.
Reviewers: MaskRay
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D65789
llvm-svn: 368154
Summary:
In an attempt to make file-address-based lookups more predictable, in D55998
we started ignoring sections which would result in file address
overlaps. It turns out this was too aggressive because thread-local
sections typically will have file addresses which apear to overlap
regular data/code. This does not cause a problem at runtime because
thread-local sections are loaded into memory using special logic, but it
can cause problems for lldb when trying to lookup objects by their file
address.
This patch changes ObjectFileELF to permit thread-local sections to
overlap regular ones by essentially giving them a separate address
space. It also makes them more symmetrical to regular sections by
creating container sections from PT_TLS segments.
Simultaneously, the patch changes the regular file address lookup logic
to ignore sections with the thread-specific bit set. I believe this is
what the users looking up file addresses would typically expect, as
looking up thread-local data generally requires more complex logic (e.g.
DWARF has a special opcode for that).
Reviewers: clayborg, jingham, MaskRay
Subscribers: emaste, aprantl, arichardson, lldb-commits
Differential Revision: https://reviews.llvm.org/D65282
llvm-svn: 368010
Summary:
The debug link and build-id lookups are two independent ways one can
search for a separate symbol file. However, our implementation in
SymbolVendorELF was tying the two together and refusing to look up the
symbol file based on a build id if the file did not contain a debug
link.
This patch makes it possible to search for the symbol file with
just one of the two methods available. To demonstrate, I split the
build-id-case test into two, so that we test the search using both
methods.
Reviewers: jankratochvil, mgorny, clayborg, espindola, alexshap
Subscribers: emaste, arichardson, MaskRay, lldb-commits
Differential Revision: https://reviews.llvm.org/D65561
llvm-svn: 367994
Summary:
lld r367537 changed the way the linker organizes sections and segments.
This exposed an lldb bug and caused some tests to fail.
In all of the failing tests the root cause was the same -- when we were
trying to resolve the last address in the line_table section, we failed
because it pointed past the end of the section.
This patch changes the line table address resolution code to back up the
address by one for end-of-sequence entries. This ensures the address
still points inside a section/module even if the line table sequence
ends at the very end of a section.
It also reverts the linker flags which were added to the failing tests
to restore previous behavior.
Reviewers: clayborg, jingham
Subscribers: mgorny, MaskRay, lldb-commits
Differential Revision: https://reviews.llvm.org/D65647
llvm-svn: 367983
Pavel Labath