Summary:
If the remote uses include features when communicating
xml register info back to lldb, the existing code would reset the
lldb register index at the beginning of each include node.
This would lead to multiple registers having the same lldb register index.
Since the lldb register numbers should be contiguous and unique,
maintain them accross the parsing of all of the xml feature nodes.
Reviewers: jingham, jasonmolenda, clayborg
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D19303
llvm-svn: 267468
Summary:
When we receive an svr4 packet from the remote, we check for new modules
and add them to the list of images in the target. However, we did not
do the same for modules which have been removed.
This was causing TestLoadUnload to fail when using ds2, which uses
svr4 packets to communicate all library info on Linux. This patch fixes
the failing test.
Reviewers: zturner, tfiala, ADodds
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D19230
llvm-svn: 267467
Summary:
eRegisterKindProcessPlugin is used to store the register
indices used by the remote, and eRegisterKindLLDB is used
to store the internal lldb register indices. However, we're currently
using the lldb indices instead of the process plugin indices
when sending p/P packets. This will break if the remote uses
non-contiguous register indices.
Reviewers: jasonmolenda, clayborg
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D19305
llvm-svn: 267466
Summary:
lldb-server tests are currently being skipped on the
check-lldb target. This is because we get the path of
lldb-server by modifying the path to the lldb executable.
However, by this point, we've changed directories, and a
relative path to the build/bin directory will no longer point
to the location of lldb-server.
Storing an absolute path solves this issue.
Reviewers: vharron, zturner, tfiala, labath
Subscribers: labath, lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D19082
llvm-svn: 267463
Summary:
Do not assume that liblldb.so is located in $(lldb -P)/../../../lib
when creating the _lldb python symlink. Instead, use the path passed
to LLVM_LIBDIR_SUFFIX, defaulting to $(lldb -P)/../../../lib when this
variable is not set.
Reviewers: vharron, emaste, zturner
Subscribers: zturner, labath, lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D19067
llvm-svn: 267462
Summary:
"gcc" is equivalent to "ehframe" in ProcessGDBRemote, but
only "ehframe" was a valid response in the test suite.
Reviewers: tfiala, jasonmolenda, clayborg
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18807
llvm-svn: 267459
Test added in r267248 exposed a bug in handling of dwarf produced by clang>=3.9, which causes a
crash during expression evaluation. Skip the test until this is sorted out.
llvm-svn: 267407
Make sure we figure out correct plt entry field in case linker has generated a small value below realistic entry size like 4 bytes or below.
Differential revision: http://reviews.llvm.org/D19252
llvm-svn: 267405
This option evaluates an expression and, if the result is of pointer type, treats it as if it was an array of that many elements and displays such elements
This has a couple subtle points but is mostly as straightforward as it sounds
Add a parray N <expr> alias for this new mode
Also, extend the --object-description mode to do the moral equivalent of the above but display each element in --object-description mode
Add a poarray N <expr> alias for this
llvm-svn: 267372
RegisterContextLLDB::InitializeNonZerothFrame already has code to attempt
to detect and handle the case where the PC points beyond the end of a
function, but there are certain cases where this doesn't work correctly.
In fact, there are *two* different places where this detection is attempted,
and the failure is in fact a result of an unfortunate interaction between
those two separate attempts.
First, the ResolveSymbolContextForAddress routine is called with the
resolve_tail_call_address flag set to true. This causes the routine
to internally accept a PC pointing beyond the end of a function, and
still resolving the PC to that function symbol.
Second, the InitializeNonZerothFrame routine itself maintains a
"decr_pc_and_recompute_addr_range" flag and, if that turns out to
be true, itself decrements the PC by one and searches again for
a symbol at that new PC value.
Both approaches correctly identify the symbol associated with the PC.
However, the problem is now that later on, we also need to find the
DWARF CFI record associated with the PC. This is done in the
RegisterContextLLDB::GetFullUnwindPlanForFrame routine, and uses
the "m_current_offset_backed_up_one" member variable.
However, that variable only actually contains the PC "backed up by
one" if the *second* approach above was taken. If the function was
already identified via the first approach above, that member variable
is *not* backed up by one but simply points to the original PC.
This in turn causes GetEHFrameUnwindPlan to not correctly identify
the DWARF CFI record associated with the PC.
Now, in many cases, if the first method had to back up the PC by one,
we *still* use the second method too, because of this piece of code:
// Or if we're in the middle of the stack (and not "above" an asynchronous event like sigtramp),
// and our "current" pc is the start of a function...
if (m_sym_ctx_valid
&& GetNextFrame()->m_frame_type != eTrapHandlerFrame
&& GetNextFrame()->m_frame_type != eDebuggerFrame
&& addr_range.GetBaseAddress().IsValid()
&& addr_range.GetBaseAddress().GetSection() == m_current_pc.GetSection()
&& addr_range.GetBaseAddress().GetOffset() == m_current_pc.GetOffset())
{
decr_pc_and_recompute_addr_range = true;
}
In many cases, when the PC is one beyond the end of the current function,
it will indeed then be exactly at the start of the next function. But this
is not always the case, e.g. if there happens to be alignment padding
between the end of one function and the start of the next.
In those cases, we may sucessfully look up the function symbol via
ResolveSymbolContextForAddress, but *not* set decr_pc_and_recompute_addr_range,
and therefore fail to find the correct DWARF CFI record.
A very simple fix for this problem is to just never use the first method.
Call ResolveSymbolContextForAddress with resolve_tail_call_address set
to false, which will cause it to fail if the PC is beyond the end of
the current function; or else, identify the next function if the PC
is also at the start of the next function. In either case, we will
then set the decr_pc_and_recompute_addr_range variable and back up the
PC anyway, but this time also find the correct DWARF CFI.
A related problem is that the ResolveSymbolContextForAddress sometimes
returns a "symbol" with empty name. This turns out to be an ELF section
symbol. Now, usually those get type eSymbolTypeInvalid. However, there
is code in ObjectFileELF::ParseSymbols that tries to change the type of
invalid symbols to eSymbolTypeCode or eSymbolTypeData if the symbol
lies within the code or data section.
Unfortunately, this check also hits the symbol for the code section
itself, which is then marked as eSymbolTypeCode. While the size of
the section symbol is 0 according to the ELF file, LLDB considers
this size invalid and attempts to figure out the "correct" size.
Depending on how this goes, we may end up with a symbol that overlays
part of the code section, even outside areas covered by real function
symbols.
Therefore, if we call ResolveSymbolContextForAddress with PC pointing
beyond the end of a function, we may get this bogus section symbol.
This again means InitializeNonZerothFrame thinks we have a valid PC,
but then we don't find any unwind info for it.
The fix for this problem is me to simply always leave ELF section
symbols as type eSymbolTypeInvalid.
Differential Revision: http://reviews.llvm.org/D18975
llvm-svn: 267363
This adds basic parsing of the EABI attributes section. This section contains
additional information about the target for which the file was built. Attempt
to infer additional architecture information from that section.
llvm-svn: 267291
Some older versions of clang emitted bit offsets that were negative and these bitfields would have their bitfield-ness stripped off and it would cause a clang assertion in clang assertions were enabled. I updated the bitfield C test to make sure we don't regress.
<rdar://problem/21082998>
llvm-svn: 267248
Conditionalise a variable definition which may be unused in certain compilations
due to the preprocessor. Protect the variable accordingly. NFC.
llvm-svn: 267247
Code was added in ClangExpressionParser::ClangExpressionParser that was calling through
the process w/o checking that it was good. Also, we were pretending that we could do something
reasonable if we had no target, but that's actually not true, so I check for a target at the
beginning of the constructor and don't make a compiler in that case.
<rdar://problem/25841198>
llvm-svn: 266944
This change moves all the test event handling and its related
ResultsFormatter classes out of the packages/Python/lldbsuite/test dir
into a packages/Python/lldbsuite/test_event package. Formatters are
moved into a sub-package under that.
I am limiting the scope of this change to just the motion and a few
minor issues caught by a static Python checker (e.g. removing unused
import statements).
This is a pre-step for adding package-level tests to the test event
system. I also intend to simplify test event results formatter selection
after I make sure this doesn't break anybody.
See:
http://reviews.llvm.org/D19288
Reviewed by:
Pavel Labath
llvm-svn: 266885
When stopping the private state thread, there was a race condition between the time the thread exits (resetting the HostThread object) and the time a Join was attempted, especially in the case of a timeout.
The previous workaround of copying the HostThread object is not enough, since on a Reset the internal thread stuff gets nulled out regardless of which HostThread object actually has Reset called on it, resulting in an attempt to dereference a null pointer on the subsequent call to Join from the copy as well.
Additionally, there was a race between the detach (called when stopping the process) and the stop itself, causing the stop to time out because it was waiting for the private state thread to see the stop state, but it had exited immediately after entering the detached state.
Patch by cameron314
Differential Revision: http://reviews.llvm.org/D19122
llvm-svn: 266733
Also does the following:
* adopts PEP8 naming convention for OptionalWith class (now
optional_with).
* moves test_runner/lldb_utils.py to lldbsuite/support/optional_with.py.
* packages tests in a subpackage of test_runner per recommendations in
http://the-hitchhikers-guide-to-packaging.readthedocs.org/en/latest/creation.html
Tests can be run from within pacakges/Python/lldbsuite/test via this
command:
python -m unittest discover test_runner
The primary cleanup this allows is avoiding the need to muck with the
PYTHONPATH variable from within the source files. This also aids some
of the static code checkers as they don't need to run code to determine
the proper python path.
llvm-svn: 266710
This ensure lldbinline.test_file paths are tracked as .py
files rather than .pyc files.
Also, this change adds an assert to the test infrastructure
if a filename that is not ending in .py is attempted to be
added to the test events infrastructure where we track test
results.
See:
http://reviews.llvm.org/D19215
Earlier revision reviewed by:
Pavel Labath
llvm-svn: 266664
The race boiled down to this:
If a test worker queue is able to run the test inferior and
clean up before the dosep.py listener socket is spun up, and
the worker queue is the last one (as would be the case when
there's only one test rerunning in the rerun queue), then
the test suite will exit the main loop before having a chance
to process any test events coming from the test inferior or
the worker queue job control.
I found this race to be far more likely on fast hardware.
Our Linux CI is one such example. While it will show
up primarily during meta test events generated by
a worker thread when a test inferior times out or
exits with an exceptional exit (e.g. seg fault), it only
requires that the OS takes longer to hook up the
listener socket than it takes for the final test inferior
and worker thread to shut down.
See:
http://reviews.llvm.org/D19214
reviewed by:
Pavel Labath
llvm-svn: 266624
At the moment almost every lit.site.cfg.in contains two lines comment:
## Autogenerated by LLVM/Clang configuration.
# Do not edit!
The patch adds variable LIT_SITE_CFG_IN_HEADER, that is replaced from
configure_lit_site_cfg with the note and some useful information.
llvm-svn: 266522
Summary:
Doing a pthread_detach while the thread is exiting can cause crashes or other mischief, so we
make sure the thread stays around long enough. The performance impact of the added
synchronization should be minimal, as the parent thread is already holding a mutex, so I am just
making sure it holds it for a little while longer. It's possible the new thread will block on
this mutex immediately after startup, but it should be unblocked really quickly and some
blocking is unavoidable if we actually want to have this synchronization.
Reviewers: tberghammer
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D19153
llvm-svn: 266423
Recommit modified version of r266311 including build bot regression fix.
This differs from the original r266311 by:
- Fixing Scalar::Promote to correctly zero- or sign-extend value depending
on signedness of the *source* type, not the target type.
- Omitting a few stand-alone fixes that were already committed separately.
llvm-svn: 266422
This routine contained a stray "return false;" making part of the code
never executed. Also, the stack offset where to find on-stack arguments
was incorrect.
llvm-svn: 266417
Summary:
The original breakpoint location test was failing for linux, because the compilers here tend to
merge the full-object and subobject destructors even at -O0 (as a result, we are getting only 2
breakpoint locations, and not 4 as the test expected. The fixup in r266164 substantially weakened
the test, as it now did not check whether both kinds of destructors were being found.
Because of these contraints, I have altered the logic of the test. It sets the
breakpoint by name, and then independently verifies that the breakpoint is set on the correct
demangled symbol name (which is not very meaningful since both kinds of destructors demangle to
the same name) *and* the correct symbol address (which is obtained by looking up the mangled
symbol name).
Reviewers: clayborg
Subscribers: ovyalov, zturner, lldb-commits
Differential Revision: http://reviews.llvm.org/D19052
llvm-svn: 266416
This implements a PDBASTParser and corresponding logic in
SymbolFilePDB to do type lookup by name. This is just a first
pass and leaves many aspects of type lookup unimplemented, and
just focuses on laying the framework. With this patch, you should
be able to lookup basic types by name from a PDB.
Full class definitions are not completed yet, we will instead
just return a forward declaration of the class.
Differential Revision: http://reviews.llvm.org/D18848
Reviewed by: Greg Clayton
llvm-svn: 266392
Disabling buffering exposes a bug in the MS VS 2015 CRT implementation of fgets, where you sometimes have to hit Enter twice, depending on if the input had an odd or even number of characters.
This was hidden until a few days ago by the Python initialization which was re-enabling buffering on the streams. A few days ago, Enrico make the Python initialization on-demand, which exposed this problem.
llvm-svn: 266384
The android dirty stderr problem has uncovered an issue where lldbutil.expect_state_changes was
reading events other than state change events, which resulted in general confusion. Make it more
strict to accept *only* state changes.
llvm-svn: 266327
Summary:
On some android targets, a binary can produce additional garbage (e.g. warning messages from the
dynamic linker) on the standard error, which confuses some tests. This relaxes the stderr
expectations for targets known for their chattyness.
Reviewers: tfiala, ovyalov
Subscribers: tberghammer, danalbert, srhines, lldb-commits
Differential Revision: http://reviews.llvm.org/D19114
llvm-svn: 266326
Code in ObjectFileELF::ParseTrampolineSymbols assumes that the sh_info
field of the .rel(a).plt section identifies the .plt section.
However, with recent GNU ld this is no longer true. As a result of this:
https://sourceware.org/bugzilla/show_bug.cgi?id=18169
in object files generated with current linkers the sh_info field of
.rel(a).plt now points to the .got.plt section (or .got on some targets).
This causes LLDB to fail to identify any PLT stubs, causing a number of
test case failures.
This patch changes LLDB to simply always look for the .plt section by
name. This should be safe across all linkers and targets.
Differential Revision: http://reviews.llvm.org/D18973
llvm-svn: 266316
A number of test cases were failing on big-endian systems simply due to
byte order assumptions in the tests themselves, and no underlying bug
in LLDB.
These two test cases:
tools/lldb-server/lldbgdbserverutils.py
python_api/process/TestProcessAPI.py
actually check for big-endian target byte order, but contain Python errors
in the corresponding code paths.
These test cases:
functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py
functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py
functionalities/data-formatter/synthcapping/TestSyntheticCapping.py
lang/cpp/frame-var-anon-unions/TestFrameVariableAnonymousUnions.py
python_api/sbdata/TestSBData.py (first change)
could be fixed to check for big-endian target byte order and update the
expected result strings accordingly. For the two synthetic tests, I've
also updated the source to make sure the fake_a value is always nonzero
on both big- and little-endian platforms.
These test case:
python_api/sbdata/TestSBData.py (second change)
functionalities/memory/cache/TestMemoryCache.py
simply accessed memory with the wrong size, which wasn't noticed on LE
but fails on BE.
Differential Revision: http://reviews.llvm.org/D18985
llvm-svn: 266315
Running the ARM instruction emulation test on a big-endian system
would fail, since the code doesn't respect endianness properly.
In EmulateInstructionARM::TestEmulation, code assumes that an
instruction opcode read in from the test file is in target byte
order, but it was in fact read in in host byte order.
More difficult to fix, the EmulationStateARM structure models
the overlapping sregs and dregs by a union in _sd_regs. This
only works correctly if the host is a little-endian system.
I've removed the union in favor of a simple array containing
the 32 sregs, and changed any code accessing dregs to explicitly
use the correct two sregs overlaying that dreg in the proper
target order.
Also, the EmulationStateARM::ReadPseudoMemory and WritePseudoMemory
track memory as a map of uint32_t values in host byte order, and
implement 64-bit memory accessing by splitting them up into two
uint32_t ones. However, callers expect memory contents to be
provided in the form of a byte array (in target byte order).
This means the uint32_t contents need to be byte-swapped on
BE systems, and when splitting up a 64-bit access into two 32-bit
ones, byte order has to be respected.
Differential Revision: http://reviews.llvm.org/D18984
llvm-svn: 266314
This patch fixes a bunch of issues that show up on big-endian systems:
- The gnu_libstdcpp.py script doesn't follow the way libstdc++ encodes
bit vectors: it should identify the enclosing *word* and then access
the appropriate bit within that word. Instead, the script simply
operates on bytes. This gives the same result on little-endian
systems, but not on big-endian.
- lldb_private::formatters::WCharSummaryProvider always assumes wchar_t
is UTF16, even though it could also be UTF8 or UTF32. This is mostly
not an issue on little-endian systems, but immediately fails on BE.
Fixed by checking the size of wchar_t like WCharStringSummaryProvider
already does.
- ClangASTContext::GetChildCompilerTypeAtIndex uses uint32_t to access
the virtual base offset stored in the vtable, even though the size
of this field matches the target pointer size according to the C++
ABI. Again, this is mostly not visible on LE, but fails on BE.
- Process::ReadStringFromMemory uses strncmp to search for a terminator
consisting of multiple zero bytes. This doesn't work since strncmp
will stop already at the first zero byte. Use memcmp instead.
Differential Revision: http://reviews.llvm.org/D18983
llvm-svn: 266313
Currently, the DataExtractor::GetMaxU64Bitfield and GetMaxS64Bitfield
routines assume the incoming "bitfield_bit_offset" parameter uses
little-endian bit numbering, i.e. a bitfield_bit_offset 0 refers to
a bitfield whose least-significant bit coincides with the least-
significant bit of the surrounding integer.
On many big-endian systems, however, the big-endian bit numbering
is used for bit fields. Here, a bitfield_bit_offset 0 refers to
a bitfield whose most-significant bit conincides with the most-
significant bit of the surrounding integer.
Now, in principle LLDB could arbitrarily choose which semantics of
bitfield_bit_offset to use. However, there are two problems with
the current approach:
- When parsing DWARF, LLDB decodes bit offsets in little-endian
bit numbering on LE systems, but in big-endian bit numbering
on BE systems. Passing those offsets later on into the
DataExtractor routines gives incorrect results on BE.
- In the interim, LLDB's type layer combines byte and bit offsets
into a single number. I.e. instead of recording bitfields by
specifying the byte offset and byte size of the surrounding
integer *plus* the bit offset of the bit field within that field,
it simply records a single bit offset number.
Now, note that converting from byte offset + bit offset to a
single offset value and back is well-defined if we either use
little-endian byte order *and* little-endian bit numbering,
or use big-endian byte order *and* big-endian bit numbering.
Any other combination will yield incorrect results.
Therefore, the simplest approach would seem to be to always use
the bit numbering that matches the system byte order. This makes
storing a single bit offset valid, and makes the existing DWARF
code correct. The only place to fix is to teach DataExtractor
to use big-endian bit numbering on big endian systems.
However, there is only additional caveat: we also get bit offsets
from LLDB synthetic bitfields. While the exact semantics of those
doesn't seem to be well-defined, from test cases it appears that
the intent was for the user-provided synthetic bitfield offset to
always use little-endian bit numbering. Therefore, on a big-endian
system we now have to convert those to big-endian bit numbering
to remain consistent.
Differential Revision: http://reviews.llvm.org/D18982
llvm-svn: 266312
The Scalar implementation and a few other places in LLDB directly
access the internal implementation of APInt values using the
getRawData method. Unfortunately, pretty much all of these places
do not handle big-endian systems correctly. While on little-endian
machines, the pointer returned by getRawData can simply be used as
a pointer to the integer value in its natural format, no matter
what size, this is not true on big-endian systems: getRawData
actually points to an array of type uint64_t, with the first element
of the array always containing the least-significant word of the
integer. This means that if the bitsize of that integer is smaller
than 64, we need to add an offset to the pointer returned by
getRawData in order to access the value in its natural type, and
if the bitsize is *larger* than 64, we actually have to swap the
constituent words before we can access the value in its natural type.
This patch fixes every incorrect use of getRawData in the code base.
For the most part, this is done by simply removing uses of getRawData
in the first place, and using other APInt member functions to operate
on the integer data.
This can be done in many member functions of Scalar itself, as well
as in Symbol/Type.h and in IRInterpreter::Interpret. For the latter,
I've had to add a Scalar::MakeUnsigned routine to parallel the existing
Scalar::MakeSigned, e.g. in order to implement an unsigned divide.
The Scalar::RawUInt, Scalar::RawULong, and Scalar::RawULongLong
were already unused and can be simply removed. I've also removed
the Scalar::GetRawBits64 function and its few users.
The one remaining user of getRawData in Scalar.cpp is GetBytes.
I've implemented all the cases described above to correctly
implement access to the underlying integer data on big-endian
systems. GetData now simply calls GetBytes instead of reimplementing
its contents.
Finally, two places in the clang interface code were also accessing
APInt.getRawData in order to actually construct a byte representation
of an integer. I've changed those to make use of a Scalar instead,
to avoid having to re-implement the logic there.
The patch also adds a couple of unit tests verifying correct operation
of the GetBytes routine as well as the conversion routines. Those tests
actually exposed more problems in the Scalar code: the SetValueFromData
routine didn't work correctly for 128- and 256-bit data types, and the
SChar routine should have an explicit "signed char" return type to work
correctly on platforms where char defaults to unsigned.
Differential Revision: http://reviews.llvm.org/D18981
llvm-svn: 266311
Scalar::GetBytes provides a non-const access to the underlying bytes
of the scalar value, supposedly allowing for modification of those
bytes. However, even with the current implementation, this is not
really possible. For floating-point scalars, the pointer returned
by GetBytes refers to a temporary copy; modifications to that copy
will be simply ignored. For integer scalars, the pointer refers
to internal memory of the APInt implementation, which isn't
supposed to be directly modifyable; GetBytes simply casts aways
the const-ness of the pointer ...
With my upcoming patch to fix Scalar::GetBytes for big-endian
systems, this problem is going to get worse, since there we need
temporary copies even for some integer scalars. Therefore, this
patch makes Scalar::GetBytes const, fixing all those problems.
As a follow-on change, RegisterValues::GetBytes must be made const
as well. This in turn means that the way of initializing a
RegisterValue by doing a SetType followed by writing to GetBytes
no longer works. Instead, I've changed SetValueFromData to do
the equivalent of SetType itself, and then re-implemented
SetFromMemoryData to work on top of SetValueFromData.
There is still a need for RegisterValue::SetType, since some
platform-specific code uses it to reinterpret the contents of
an already filled RegisterValue. To make this usage work in
all cases (even changing from a type implemented via Scalar
to a type implemented as a byte buffer), SetType now simply
copies the old contents out, and then reloads the RegisterValue
from this data using the new type via SetValueFromData.
This in turn means that there is no remaining caller of
Scalar::SetType, so it can be removed.
The only other follow-on change was in MIPS EmulateInstruction
code, where some uses of RegisterValue::GetBytes could be made
const trivially.
Differential Revision: http://reviews.llvm.org/D18980
llvm-svn: 266310
This fixes several test case failure on s390x caused by the fact that
on this platform, the default "char" type is unsigned.
- In ClangASTContext::GetBuiltinTypeForEncodingAndBitSize we should return
an explicit *signed* char type for encoding eEncodingSint and bit size 8,
instead of the default platform char type (which may be unsigned).
This fix matches existing code in ClangASTContext::GetIntTypeFromBitSize,
and fixes the TestClangASTContext.TestBuiltinTypeForEncodingAndBitSize
unit test case.
- The test/expression_command/char/TestExprsChar.py test case is known to
fail on platforms defaulting to unsigned char (pr23069), and just needs
to be xfailed on s390x like on arm.
- The test/functionalities/watchpoint/watchpoint_on_vectors/main.c test
case defines a vector of "char" and implicitly assumes to be signed.
Use an explicit "signed char" instead.
Differential Revision: http://reviews.llvm.org/D18979
llvm-svn: 266309
This patch adds support for Linux on SystemZ:
- A new ArchSpec value of eCore_s390x_generic
- A new directory Plugins/ABI/SysV-s390x providing an ABI implementation
- Register context support
- Native Linux support including watchpoint support
- ELF core file support
- Misc. support throughout the code base (e.g. breakpoint opcodes)
- Test case updates to support the platform
This should provide complete support for debugging the SystemZ platform.
Not yet supported are optional features like transaction support (zEC12)
or SIMD vector support (z13).
There is no instruction emulation, since our ABI requires that all code
provide correct DWARF CFI at all PC locations in .eh_frame to support
unwinding (i.e. -fasynchronous-unwind-tables is on by default).
The implementation follows existing platforms in a mostly straightforward
manner. A couple of things that are different:
- We do not use PTRACE_PEEKUSER / PTRACE_POKEUSER to access single registers,
since some registers (access register) reside at offsets in the user area
that are multiples of 4, but the PTRACE_PEEKUSER interface only allows
accessing aligned 8-byte blocks in the user area. Instead, we use a s390
specific ptrace interface PTRACE_PEEKUSR_AREA / PTRACE_POKEUSR_AREA that
allows accessing a whole block of the user area in one go, so in effect
allowing to treat parts of the user area as register sets.
- SystemZ hardware does not provide any means to implement read watchpoints,
only write watchpoints. In fact, we can only support a *single* write
watchpoint (but this can span a range of arbitrary size). In LLDB this
means we support only a single watchpoint. I've set all test cases that
require read watchpoints (or multiple watchpoints) to expected failure
on the platform. [ Note that there were two test cases that install
a read/write watchpoint even though they nowhere rely on the "read"
property. I've changed those to simply use plain write watchpoints. ]
Differential Revision: http://reviews.llvm.org/D18978
llvm-svn: 266308
If the UnwindPlan did not identify how to unwind the stack pointer
register, LLDB currently assumes it can determine to caller's SP
from the current frame's CFA. This is true on most platforms
where CFA is by definition equal to the incoming SP at function
entry.
However, on the s390x target, we instead define the CFA to equal
the incoming SP plus an offset of 160 bytes. This is because
our ABI defines that the caller has to provide a register save
area of size 160 bytes. This area is allocated by the caller,
but is considered part of the callee's stack frame, and therefore
the CFA is defined as pointing to the top of this area.
In order to make this work on s390x, this patch introduces a new
ABI callback GetFallbackRegisterLocation that provides platform-
specific fallback register locations for unwinding. The existing
code to handle SP unwinding as well as volatile registers is moved
into the default implementation of that ABI callback, to allow
targets where that implementation is incorrect to override it.
This patch in itself is a no-op for all existing platforms.
But it is a pre-requisite for adding s390x support.
Differential Revision: http://reviews.llvm.org/D18977
llvm-svn: 266307
Summary:
In D18689, I removed the call to Normalize() in FileSpec::SetFile, because it no longer seemed
needed, and it resolved a quirk in the FileSpec API (spec.GetCString() returnes a path with
backslashes, but spec.GetDirectory().GetCString() has forward slashes). This turned out to be a
problem because we would consider paths with different separators as different (which led to
unresolved breakpoints for instance).
Here, I am putting back in the call to Normalize() and adding a unittest for FileSpec::Equal. I
am commenting out the GetDirectory unittests until we figure out the what is the expected
behaviour here.
Reviewers: zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D19060
llvm-svn: 266286
result_formatter used inspect.getfile() to get the python file name, which returned "*.pyc" if
the bytecode file was present. This resulted in files being displayed with the wrong extension,
and more critically, would confuse the rerun logic because it would try to rerun the pyc file
(which resulted in an empty rerun list as unittest refused to run those).
Fix: use inspect.getsourcefile() instead.
I am not sure why does was not an issue before. I can only assume that some system update
tricked python into producing bytecode files more aggressively.
llvm-svn: 266192
will not exceed the bounds of their Section. This is addressing a
problem where a file had a large space between two sections that
were not used by this module - the last symbol in the text section
had an enormous size because the distance between that and the first
symbol in the data section were used to compute the size.
http://reviews.llvm.org/D19004
<rdar://problem/25227945>
llvm-svn: 266165
When run with the multiprocess test runner, the getchar() trick doesn't work, so ninja check-lldb would fail on this test, but running the test directly worked fine.
Differential Revision: http://reviews.llvm.org/D19035
llvm-svn: 266145
(lldb) b ~Foo
(lldb) b Foo::~Foo
(lldb) b Bar::Foo::~Foo
Improved out C++ breakpoint locations tests as well to cover this issue.
<rdar://problem/25577252>
llvm-svn: 266139
The result variables aren't useful, and if you have a breakpoint on a
common function you can generate a lot of these. So I changed the
code that checks the condition to set ResultVariableIsInternal in the
EvaluateExpressionOptions that we pass to the execution.
Unfortunately, the check for this variable was done in the wrong place
(the static UserExpression::Evaluate) which is not how breakpoint
conditions execute expressions (UserExpression::Execute). So I moved
the check to UserExpression::Execute (which Evaluate also calls) and made the
overridden method DoExecute.
llvm-svn: 266093
this test was unintentionally XFAILed due to a change in the behavior of the expectedFailure
decorator. Fix that. Also, mark the test as debug-info independent while I'm in there.
llvm-svn: 266072
The structure definitions are not provided, but we perform a sizeof operation of
them which causes a build failure. Include `asm/ptrace.h` to get the structure
definitions.
llvm-svn: 266042
Summary:
If we recieve a SIGCONT or SIGTSTP, while the driver is shutting down (which, sometimes, we do,
for reasons which are not completely clear to me), we would crash to due a null pointer
dereference. Guard against this situation.
Reviewers: clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18965
llvm-svn: 265958
-thread-info in lldbmi does not conform to protocol. Should end with
current thread id as described here:
https://sourceware.org/gdb/onlinedocs/gdb/GDB_002fMI-Thread-Commands.html#GDB_002fMI-Thread-Commands
When printing all threads, the current thread id should be printed
afterwards.
Example:
-thread-info
^done,threads=[
{id="2",target-id="Thread 0xb7e14b90 (LWP 21257)",
frame={level="0",addr="0xffffe410",func="__kernel_vsyscall",
args=[]},state="running"},
{id="1",target-id="Thread 0xb7e156b0 (LWP 21254)",
frame={level="0",addr="0x0804891f",func="foo",
args=[{name="i",value="10"}],
file="/tmp/a.c",fullname="/tmp/a.c",line="158"},
state="running"}],
current-thread-id="1"
(gdb)
Patch from jacdavis@microsoft.com
Reviewers: zturner, chuckr
Differential Revision: http://reviews.llvm.org/differential/revision/edit/18880/
llvm-svn: 265858
This code was getting evaluated unintentionally at binding
generation time instead of binding file compilation time.
Addresses:
https://bugs.swift.org/browse/SR-1192
llvm-svn: 265829
The Python import works by ensuring the directory of the module or package is in sys.path, and then it does a Python `import foo`. The original code was not escaping the backslashes in the directory path, so this wasn't working.
Differential Revision: http://reviews.llvm.org/D18873
llvm-svn: 265738
os to "ios" or "macosx" if it is unspecified. For environments
where there genuinely is no os, we don't want to errantly
convert that to ios/macosx, e.g. bare board debugging.
Change PlatformRemoteiOS, PlatformRemoteAppleWatch, and
PlatformRemoteAppleTV to not create themselves if we have
an unspecified OS. Same problem - these are not appropriate
platforms for bare board debugging environments.
Have Process::Attach's logging take place if either
process or target logging is enabled.
<rdar://problem/25592378>
llvm-svn: 265732
In turns out this does make a functional change, in case when the inferior hits an int3 that was
not placed by the debugger. Backing out for now.
llvm-svn: 265647
TargetOptions is ambiguous due to a definition in LLVM and in clang. This was
exposed by SVN r265640. Update to fix the build against the newer revision.
llvm-svn: 265644
Summary:
SetThreadStopInfo was checking for a breakpoint at the current PC several times. This merges the
identical code into a separate function. I've left one breakpoint check alone, as it was doing
more complicated stuff, and it did not see a way to merge that without making the interface
complicated. NFC.
Reviewers: clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18819
llvm-svn: 265560
Summary:
This resolves a similar problem as D16720 (which handled the case when we single-step onto a
breakpoint), but this one deals with involutary stops: when we stop a thread (e.g. because
another thread has hit a breakpont and we are doing a full stop), we can end up stopping it right
before it executes a breakpoint instruction. In this case, the stop reason will be empty, but we
will still step over the breakpoint when do the next resume, thereby missing a breakpoint hit.
I have observed this happening in TestConcurrentEvents, but I have no idea how to reproduce this
behavior more reliably.
Reviewers: clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18692
llvm-svn: 265525
This test sets the compiler optimization level to -O1 and
makes some assumptions about how local frame vars will be
stored (i.e. in registers). These assumptions are not always
true.
I did a first-pass set of improvements that:
(1) no longer assumes that every one of the target locations has
every variable in a register. Sometimes the compiler
is even smarter and skips the register entirely.
(2) simply expects one of the 5 or so variables it checks
to be in a register.
This test probably passes on a whole lot more systems than it
used to now. This is certainly true on OS X.
llvm-svn: 265498
Summary:
The '-p' option for dotest.py was ignored in multiprocess mode,
as the -p argument to the inferior would overwrite the -p argument
passed on the command line.
Reviewers: zturner, tfiala
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18779
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 265422
Summary: Flag updated in D233237
Reviewers: spyffe, jingham, Eugene.Zelenko
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18660
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 265421
Summary: Print environment from triple if it exists.
Reviewers: tfiala, clayborg
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18620
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 265420
Summary:
The logic to read modules from memory was added to LoadModuleAtAddress
in the dynamic loader, but not in process gdb remote. This means that when
the remote uses svr4 packets to give library info, libraries only present
on the remote will not be loaded.
This patch therefore involves some code duplication from LoadModuleAtAddress
in the dynamic loader, but removing this would require some amount of code
refactoring.
Reviewers: ADodds, tberghammer, tfiala, deepak2427, ted
Subscribers: tfiala, lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18531
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 265418
Previously we had 3 different method to run shell commands on the
target and 4 copy of code waiting until a given file appears on the
target device (used for syncronization). This CL merges these methods
to 1 run_platform_command and 1 wait_for_file_on_target functions
located in some utility classes.
Differential revision: http://reviews.llvm.org/D18789
llvm-svn: 265398
Summary:
There was a bug in linux core file handling, where if there was a running process with the same
process id as the id in the core file, the core file debugging would fail, as we would pull some
pieces of information (ProcessInfo structure) from the running process instead of the core file.
I fix this by routing the ProcessInfo requests through the Process class and overriding it in
ProcessElfCore to return correct data.
A (slightly convoluted) test is included.
Reviewers: clayborg, zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18697
llvm-svn: 265391
in thumb mode into one method in ArchSpec, replace checks for
specific cores in the disassembler with calls to this. Also call
this from the arm instruction emulation code.
The determination of whether a given ArchSpec is thumb-only is still
a bit of a hack, but at least the hack is consolidated into a single
place. In my original version of this patch http://reviews.llvm.org/D13578
I was calling into llvm's feature arm feature tables to make this
determination, like
#include "llvm/Support/TargetRegistry.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/../../lib/Target/ARM/ARMGenRegisterInfo.inc"
#include "llvm/../../lib/Target/ARM/ARMFeatures.h"
[...]
std::string triple (GetTriple().getTriple());
const char *cpu = "";
const char *features_str = "";
const llvm::Target *curr_target = llvm::TargetRegistry::lookupTarget(triple.c_str(), Error);
std::unique_ptr<llvm::MCSubtargetInfo> subtarget_info_up (curr_target->createMCSubtargetInfo(triple.c_str(), cpu, features_str));
if (subtarget_info_up->getFeatureBits()[llvm::ARM::FeatureNoARM])
{
return true;
}
but those tables are post-llvm-build generated and linking against them
for all of our different build system methods was a big hiccup that I
haven't had time to revisit convincingly.
I'll keep that reviews.llvm.org patch around to remind myself that I
need to take another run at linking against the necessary tables
again in llvm.
<rdar://problem/23022803>
llvm-svn: 265377
Teach LLDB that different shells have different characters they are sensitive to, and use that knowledge to do shell-aware escaping
This helps solve a class of problems on OS X where LLDB would try to launch via sh, and run into problems if the command line being passed to the inferior contained such special markers (hint: the shell would error out and we'd fail to launch)
This makes those launch scenarios work transparently via shell expansion
Slightly improve the error message when this kind of failure occurs to at least suggest that the user try going through 'process launch' directly
Fixes rdar://problem/22749408
llvm-svn: 265357
$(LLDB_PYTHON_TESTSUITE_CC) defaults to the just-built clang. Together
with changes to the zorg repo, this enables the Green Dragon LLDB OS X
Xcode-based builder to run the new TSAN LLDB tests.
llvm-svn: 265315
Summary:
Even though FileSpec attempted to handle both kinds of path syntaxes (posix and windows) on both
platforms, it relied on the llvm path library to do its work, whose behavior differed on
different platforms. This led to subtle differences in FileSpec behavior between platforms. This
replaces the pieces of the llvm library with our own implementations. The functions are simply
copied from llvm, with #ifdefs replaced by runtime checks for ePathSyntaxWindows.
Reviewers: zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18689
llvm-svn: 265299
This addresses the same problem as r264846 (the test not expecting the situation when two thread
hit the watchpoint simultaneously), but for a different test.
llvm-svn: 265294
In doing so, two bugs were uncovered (and fixed). The first bug
is that ClangASTContext::RemoveFastQualifiers() was broken, and
was not removing fast qualifiers (or doing anything else for that
matter). The second bug is that UnifyAccessSpecifiers treated
AS_None asymmetrically, which is probably an edge case, but seems
like a bug nonetheless.
llvm-svn: 265200
TypeSP SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx);
The problem was we might be looking for a type "Foo", and find one from another langauge. Then the DWARFASTParserClang would try to make an AST type using a CompilerType that might return an empty.
This fix makes sure that when we create a DWARFDeclContext from a DWARFDIE that the DWARFDeclContext we set the language of the DIE. Then when we go to find matches for DWARFDeclContext, we end up with bunch of DIEs. We check each DWARFDIE that we found by asking it for its language and making sure the language is compatible with the type system that we want to use. This keeps us from using the wrong types to resolve forward declarations.
<rdar://problem/25276165>
llvm-svn: 265196
Enrico has a bug on him to make this work across older libcxx list
and newer libcxx list simultaneously. Needed in preparation of
getting the OS X public CI to run the TSAN tests.
tracked by:
rdar://25499635
llvm-svn: 265188
rnb_err_t
RNBRemote::HandlePacket_stop_process (const char *p)
{
if (!DNBProcessInterrupt(m_ctx.ProcessID()))
HandlePacket_last_signal (NULL);
return rnb_success;
}
In the call to DNBProcessInterrupt we did:
nub_bool_t
DNBProcessInterrupt(nub_process_t pid)
{
MachProcessSP procSP;
if (GetProcessSP (pid, procSP))
return procSP->Interrupt();
return false;
}
This would always return false. It would cause HandlePacket_stop_process to always call "HandlePacket_last_signal (NULL);" which would send an extra stop reply packet _if_ the process is stopped. On a machine with enough cores, it would call DNBProcessInterrupt(...) and then HandlePacket_last_signal(NULL) so quickly that it will never send out an extra stop reply packet. But if the machine is slow enough or doesn't have enough cores, it could cause the call to HandlePacket_last_signal() to actually succeed and send an extra stop reply packet. This would cause problems up in GDBRemoteCommunicationClient::SendContinuePacketAndWaitForResponse() where it would get the first stop reply packet and then possibly return or execute an async packet. If it returned, then the next packet that was sent will get the second stop reply as its response. If it executes an async packet, the async packet will get the wrong response.
To fix this I did the following:
1 - in debugserver, I fixed "bool MachProcess::Interrupt()" to return true if it sends the signal so we avoid sending the stop reply twice on slower machines
2 - Added a log line to RNBRemote::HandlePacket_stop_process() to say if we ever send an extra stop reply so we will see this in the darwin console output if this does happen
3 - Added response validators to StringExtractorGDBRemote so that we can verify some responses to some packets.
4 - Added validators to packets that often follow stop reply packets like the "m" packet for memory reads, JSON packets since "jThreadsInfo" is often sent immediately following a stop reply.
5 - Modified GDBRemoteCommunicationClient::SendPacketAndWaitForResponseNoLock() to validate responses. Any "StringExtractorGDBRemote &response" that contains a valid response verifier will verify the response and keep looking for correct responses up to 3 times. This will help us get back on track if we do get extra stop replies. If a StringExtractorGDBRemote does not have a response validator, it will accept any packet in response.
6 - In GDBRemoteCommunicationClient::SendPacketAndWaitForResponse we copy the response validator from the "response" argument over into m_async_response so that if we send the packet by interrupting the running process, we can validate the response we actually get in GDBRemoteCommunicationClient::SendContinuePacketAndWaitForResponse()
7 - Modified GDBRemoteCommunicationClient::SendContinuePacketAndWaitForResponse() to always check for an extra stop reply packet for 100ms when the process is interrupted. We were already doing this because we might interrupt a process with a \x03 packet, yet the process was in the process of stopping due to another reason. This race condition could cause an extra stop reply packet because the GDB remote protocol says if a \x03 packet is sent while the process is stopped, we should send a stop reply packet back. Now we always check for an extra stop reply packet when we manually interrupt a process.
The issue was showing up when our IDE would attempt to set a breakpoint while the process is running and this would happen:
--> \x03
<-- $T<stop reply 1>
--> z0,AAAAA,BB (set breakpoint)
<-- $T<stop reply 1> (incorrect extra stop reply packet)
--> c
<-- OK (response from z0 packet)
Now all packet traffic was off by one response. Since we now have a validator on the response for "z" packets, we do this:
--> \x03
<-- $T<stop reply 1>
--> z0,AAAAA,BB (set breakpoint)
<-- $T<stop reply 1> (Ignore this because this can't be the response to z0 packets)
<-- OK -- (we are back on track as this is a valid response to z0)
...
As time goes on we should add more packet validators.
<rdar://problem/22859505>
llvm-svn: 265086
Summary:
Debug info is used only by the client and lldb-server tests do not even have the client component
running, as they communicate with the server directly. Therefore, running the tests for each
debug info type is unnecessarry.
This adds general ability to mark a test class as not dependent on debug info, and marks all
lldb-server tests as such.
Reviewers: tberghammer, tfiala
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18598
llvm-svn: 265017
Summary:
In case of Dwo, DIERef stores a compile unit offset in the main object file, and not in the dwo.
The implementation of SymbolFileDWARFDwo::GetDIE inherited from SymbolFileDWARF tried to lookup
the compilation unit in the DWO based on the main object file offset (and failed). I change the
implementation to verify the DIERef indeed references compile unit belonging to this dwo and then
lookup the die based on the die offset alone.
Includes a couple of fixes for mismatched struct/class tags.
Reviewers: tberghammer, clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18646
llvm-svn: 265011
1 - DWARF in .o files with debug map in executable: we would place the compile unit index in the upper 32 bits of the 64 bit value and the lower 32 bits would be the DIE offset
2 - DWO: we would place the compile unit offset in the upper 32 bits of the 64 bit value and the lower 32 bits would be the DIE offset
There was a mixing and matching of this and it wasn't done consistently.
Major changes include:
The DIERef constructor that takes a lldb::user_id_t now requires a SymbolFileDWARF:
DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf)
It is needed so that it can be decoded correctly. If it is DWARF in .o files with debug map in executable, then we get the right compile unit from the SymbolFileDWARFDebugMap, otherwise, we use the compile unit offset and DIE offset for DWO or normal DWARF.
The function:
lldb::user_id_t DIERef::GetUID() const;
Now becomes
lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf) const;
Again, we need the DWARF file to encode it correctly.
This removes the need for "lldb::user_id_t SymbolFileDWARF::MakeUserID() const" and for bool SymbolFileDWARF::UserIDMatches (lldb::user_id_t uid) const". There were also many places were doing things inneficiently like:
1 - encode a dw_offset_t into a lldb::user_id_t
2 - call the public SymbolFile interface to resolve types using the lldb::user_id_t
3 - This would then decode the lldb::user_id_t into a DIERef, and then try to find that type.
There are many places that are now doing this more efficiently by storing DW_AT_type form values as DWARFFormValue objects and then making a DIERef from them and directly calling the underlying function to resolve the lldb_private::Type, lldb_private::CompilerType, lldb_private::CompilerDecl, lldb_private::CompilerDeclContext.
If there are any regressions in DWARF with DWO, we will need to fix any issues that arise since the original patch wasn't functional for the much more widely used DWARF in .o files with debug map.
<rdar://problem/25200976>
llvm-svn: 264909
On some versions of Windows, the address is returned as "::1", while on others it's
"0:0:...:0:1". Accept both versions, as they represent the same address.
llvm-svn: 264850
Summary:
the inferior in the test deliberately does not lock a mutex when accessing the watched variable.
The reason for that is unclear as, based on the logs, the original intention of the test was to
check whether watchpoints get propagated to newly created threads, which should work fine even
with a mutex. Furthermore, in the unlikely event (which I have still observed happening from time
to time) that two threads do manage the execute the "critical section" simultaneously, the test
will fail, as it is expecting the watchpoint "hit count" to be 1, but in this case it will be 2.
Given this, I have simply chose to lock the mutex always, so that we have more predictible
behavior. Watchpoints being hit simultaneously is still (and correctly!) tested by
TestConcurrentEvents.
Reviewers: clayborg, jingham
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18558
llvm-svn: 264846
They're not supposed to go in the symbol table, and in fact the way the JIT
is currently implemented it sometimes crashes when you try to get the
address of such a function. So we skip them.
llvm-svn: 264821
1 - If you plan on looking for the "(lldb) " prompt as a regular expression, look for "\(lldb\) " so you don't just find "lldb".
2 - Make sure to not use colors (specify --no-use-colors as an option to lldb when launching it) as our editline will print:
"(lldb) <color junk>(lldb) "
where "<color junk>" is a work around that is used to allow us to colorize our prompts. The bad thing is this will make pexepct code like this not execute as you would expect:
prompt = "\(lldb\) "
self.child.sendline("breakpoint set ...", prompt)
self.child.sendline("breakpoint clear ...", prompt)
The problem is the first "sendline" will create two lldb prompts and will match both the first and second prompts and you output will get off. So be sure to disable colors if you need to.
Fixed a case where "TestCommandScriptImmediateOutput.py" would fail if you have spaces in your directory names. I modified custom_command.py to use shlex to parse arguments and I quoted the file path we sent down to the custom_command.write_file function.
llvm-svn: 264810
The problem was that the static DynamicLoaderDarwinKernel::Initialize() was recently changed to come before DynamicLoaderMacOSXDYLD::Initialize() which caused the DynamicLoaderDarwinKernel::CreateInstance(...) to be called before DynamicLoaderMacOSXDYLD::CreateInstance(...) and DynamicLoaderDarwinKernel would claim it could be the dynamic loader for a user space MacOSX process. The fix is to make DynamicLoaderDarwinKernel::CreateInstance() a bit more thourough when vetting the process so that it doesn't claim MacOSX user space processes.
<rdar://problem/25425373>
llvm-svn: 264794
quietly apply fixits for those who really trust clang's fixits.
Also, moved the retry into ClangUserExpression::Evaluate, where I can make a whole new ClangUserExpression
to do the work. Reusing any of the parts of a UserExpression in situ isn't supported at present.
<rdar://problem/25351938>
llvm-svn: 264793
Summary: These are not needed by lldb-server. Removing them shrinks the server by about 0.5%.
Reviewers: zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18206
llvm-svn: 264735
this was needed because lldb-mi temporarily contained references to private lldb symbols
(lldb_private namespace), which it shouldn't have. The situation has since been rectified and
this wasn't the right fix anyway, since it can lead to funny ODR violations.
llvm-svn: 264733
Summary:
Since r264316, clang started adding DW_AT_GNU_dwo_name attribute to dwo files (previously, this
attribute was only present in main object files), breaking pretty much every dwo test. The
problem was that we were treating the presence of said attribute as a signal that we should look
for information in an external object file, and caused us to enter an infinite loop. I fix this
by making sure we do not go looking for an external dwo file if we already *are* parsing a dwo
file.
Reviewers: tberghammer, clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18547
llvm-svn: 264729
This allows these functions to be re-used by a forthcoming
PDBASTParser. The functions in question are CanCompleteType,
CompleteType, and CanImport. Conceptually, these functions belong
on ClangASTImporter anyway, and previously they were just ping
ponging around through a few levels of indirection to end up there
as well, so this patch actually makes the code somewhat simpler.
A few methods were moved to a new file called ClangUtil, so that
they can be shared between ClangASTImporter and ClangASTContext
without creating a circular dependency between those two cpp
files.
Differential Revision: http://reviews.llvm.org/D18381
llvm-svn: 264685
Top-level Clang expressions are expressions that act as new translation units,
and define their own symbols. They do not have function wrappers like regular
expressions do, and declarations are persistent regardless of use of the dollar
sign in identifiers. Names defined by these are given priority over all other
symbol lookups.
This patch adds a new expression option, '-p' or '--top-level,' which controls
whether the expression is treated this way. It also adds a flag controlling
this to SBExpressionOptions so that this API is usable externally. It also adds
a test that validates that this works. (The test requires a fix to the Clang
AST importer which I will be committing shortly.)
<rdar://problem/22864976>
llvm-svn: 264662
The ASTImporter completes the full definiton for a TagDecl in several places,
including the type-deport logic. When this happens, we should also propagate
the bit that says that this is a complete definition. This makes (for example)
lambdas callable.
<rdar://problem/22864976>
llvm-svn: 264485
Blocks and lambdas have their implementation functions stored in the IR for an
expression. If we put the block/lambda into a result variable it needs to stay
around. As a heuristic, remember any execution unit that has more than one
function in it.
<rdar://problem/22864976>
llvm-svn: 264483
Summary:
This fixes a leak introduced by some of these changes:
r257644
r250530
r250525
The changes made in these patches result in leaking the FILE* passed
to SetImmediateOutputFile. GetStream() will dup() the fd held by the
python caller and create a new FILE*. It will then pass this FILE*
to SetImmediateOutputFile, which always uses the flag
transfer_ownership=false when it creates a File from the FILE*.
Since transfer_ownership is false, the lldb File destructor will not
close the underlying FILE*. Because this FILE* came from a dup-ed fd,
it will also not be closed when the python caller closes its file.
Leaking the FILE* causes issues if the same file is used multiple times
by different python callers during the same lldb run, even if these
callers open and close the python file properly, as you can end up
with issues due to multiple buffered writes to the same file.
Reviewers: granata.enrico, zturner, clayborg
Subscribers: zturner, lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18459
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 264476
months back to PlatformRemoteAppleTV and PlatformRemoteAppleWatch
to help understand what's happening when lldb can't find binaries
that it should be finding.
llvm-svn: 264380
This feature is controlled by an expression command option, a target property and the
SBExpressionOptions setting. FixIt's are only applied to UserExpressions, not UtilityFunctions,
those you have to get right when you make them.
This is just a first stage. At present the fixits are applied silently. The next step
is to tell the user about the applied fixit.
<rdar://problem/25351938>
llvm-svn: 264379
Summary:
Fixes SBCommandReturnObject::SetImmediateOutputFile() and
SBCommandReturnObject::SetImmediateOutputFile() for files opened
with "a" or "a+" by resolving inconsistencies between File and
our Python parsing of file objects.
Reviewers: granata.enrico, Eugene.Zelenko, jingham, clayborg
Subscribers: lldb-commits, sas
Differential Revision: http://reviews.llvm.org/D18228
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 264351
It would be fun to make it provide suggestions (e.g. 'can't find NString, did you mean NSString instead?'), but this worries me a little bit on the account of just how thorough of a type system scan it would have to do
llvm-svn: 264343
Summary: On Windows (and possibly other hosts with LLDB_DISABLE_LIBEDIT defined), the (lldb) prompt won't print after async output, like from a breakpoint hit or a step. This patch forces the prompt to be printed out after async output.
Reviewers: zturner, clayborg
Subscribers: amccarth, lldb-commits
Differential Revision: http://reviews.llvm.org/D18335
llvm-svn: 264332
Summary:
Though r264012 was fancy enough to make reading the jit entry struct
work with templates, the packing and alignment attributes do not work on
Windows. So, this change makes it plain and simple with manual reading
of the jit entry struct.
Reviewers: clayborg
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18379
llvm-svn: 264217
This patch adds ThreadSanitizer support into LLDB:
- Adding a new InstrumentationRuntime plugin, ThreadSanitizerRuntime, in the same way ASan is implemented.
- A breakpoint stops in `__tsan_on_report`, then we extract all sorts of information by evaluating an expression. We then populate this into StopReasonExtendedInfo.
- SBThread gets a new API, SBThread::GetStopReasonExtendedBacktraces(), which returns TSan’s backtraces in the form of regular SBThreads. Non-TSan stop reasons return an empty collection.
- Added some test cases.
Reviewed by Greg Clayton.
llvm-svn: 264162
This solves issues such as 'apropos foo' returning valid matches just because syntax examples happen to use 'foo' as a placeholder token
Fixes rdar://9043025
llvm-svn: 264123
FileSystem::Fopen is a lldb_private API, but lldb-mi uses only the
public API. Depending on lldb_private APIs makes Xcode builds fail.
I reverted the portion of r264074 that added such a dependency.
llvm-svn: 264113
This patch adds a new ExecutionPolicy, eExecutionPolicyTopLevel, which
tells the expression parser that the expression should be JITted as top
level code but nothing (except static initializers) should be run. I
have modified the Clang expression parser to recognize this execution
policy. On top of the existing patches that support storing IR and
maintaining a map of arbitrary Decls, this is mainly just patching up a
few places in the expression parser.
I intend to submit a patch for review that exposes this functionality
through the "expression" command and through the SB API. That patch
also includes a testcase for all of this.
<rdar://problem/22864976>
llvm-svn: 264095
Win32 API calls that are Unicode aware require wide character
strings, but LLDB uses UTF8 everywhere. This patch does conversions
wherever necessary when passing strings into and out of Win32 API
calls.
Patch by Cameron
Differential Revision: http://reviews.llvm.org/D17107
Reviewed By: zturner, amccarth
llvm-svn: 264074
IRExecutionUnits contain code and data that persistent declarations can
depend on. In order to keep them alive and provide for lookup of these
symbols, we now allow any PersistentExpressionState to keep a list of
execution units. Then, when doing symbol lookup on behalf of an
expression, any IRExecutionUnit can consult the persistent expression
states on a particular Target to find the appropriate symbol.
<rdar://problem/22864976>
llvm-svn: 263995
a way for compilation to take a "thread to use for compilation". If it isn't set then the
compilation will use the currently selected thread. This should help keep function execution
to the one thread intended.
llvm-svn: 263972
Persistent decls have traditionally only been types. However, we want to
be able to persist more things, like functions and global variables. This
changes some of the nomenclature and the lookup rules to make this possible.
<rdar://problem/22864976>
llvm-svn: 263864
We want to do a better job presenting errors that occur when evaluating
expressions. Key to this effort is getting away from a model where all
errors are spat out onto a stream where the client has to take or leave
all of them.
To this end, this patch adds a new class, DiagnosticManager, which
contains errors produced by the compiler or by LLDB as an expression
is created. The DiagnosticManager can dump itself to a log as well as
to a string. Clients will (in the future) be able to filter out the
errors they're interested in by ID or present subsets of these errors
to the user.
This patch is not intended to change the *users* of errors - only to
thread DiagnosticManagers to all the places where streams are used. I
also attempt to standardize our use of errors a bit, removing trailing
newlines and making clients omit 'error:', 'warning:' etc. and instead
pass the Severity flag.
The patch is testsuite-neutral, with modifications to one part of the
MI tests because it relied on "error: error:" being erroneously
printed. This patch fixes the MI variable handling and the testcase.
<rdar://problem/22864976>
llvm-svn: 263859
The Windows SDK provides a version of signal() that is much more
limited compared to other platforms. It only supports about 5-6
signal values. LLDB uses signals for a number of things, most
notably to handle Ctrl+C so we can gracefully shut down. The
portability solution to this on Windows has been to provide a
hand-rolled implementation of `signal` using the name `signal`
so that you could write code that simply calls signal directly
and it would work.
But this introduces a multiply defined symbol with the builtin
version and depending on how you included header files, you could
get yourself into a situation where you had linker errors. To
make matters worse, it led to a ton of compiler warnings. Worst
of all though is that this custom implementation of signal was,
in fact, identical for the purposes of handling Ctrl+C as the
builtin implementation of signal. So it seems to have literally
not been serving any useful purpose.
This patch deletes all the custom signal() functions for Windows,
and includes the signal.h system header, so that any calls to
signal now go to the actual version provided by the Windows SDK.
Differential Revision: http://reviews.llvm.org/D18287
llvm-svn: 263858
We are using hardlinks instead of symlinks, and we attempted to
have some logic where we don't re-create the link if the target
file already exists. This logic is faulty, however, when you
manually delete the source file (e.g. liblldb.dll) and then rebuild
lldb so that a brand new liblldb.dll gets written. Now the two files
have different inodes, but the target exists, so we would not remake
the link and the target would become stale.
We fix this by only doing the optimization if they are really the
exact same file (by comparing inode numbers), and if they are not
the same file but the target exists, we delete it and re-create
the link.
llvm-svn: 263844
Chaoren Lin