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
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
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
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
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
(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
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
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
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
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
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
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
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:
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
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
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
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
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
Summary:
The gdb-remote async thread cannot modify thread state while the main thread
holds a lock on the state. Don't use locking thread iteration for bt all.
Specifically, the deadlock manifests when lldb attempts to JIT code to
symbolicate objective c while backtracing. As part of this code path,
SetPrivateState() is called on an async thread. This async thread will
block waiting for the thread_list lock held by the main thread in
CommandObjectIterateOverThreads. The main thread will also block on the
async thread during DoResume (although with a timeout), leading to a
deadlock. Due to the timeout, the deadlock is not immediately apparent,
but the inferior will be left in an invalid state after the bt all completes,
and objective-c symbols will not be successfully resolved in the backtrace.
Reviewers: andrew.w.kaylor, jingham, clayborg
Subscribers: sas, lldb-commits
Differential Revision: http://reviews.llvm.org/D18075
Change by Francis Ricci <fjricci@fb.com>
llvm-svn: 263735
Summary:
This also adds a basic smoke test for linux core file reading. I'm checking in the core files as
well, so that the tests can run on all platforms. With some tricks I was able to produce
reasonably-sized core files (~40K).
This fixes the first part of pr26322.
Reviewers: zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18176
llvm-svn: 263628
Summary: These are not needed in lldb-server. Removing them shrinks the server size by about 1.5%.
Reviewers: zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18188
llvm-svn: 263625
This can cause differences in which bit patterns end up meaning YES or NO. In general, however, 0 == NO and 1 == YES.
To keep it simple, LLDB will now show "YES" and "NO" only for 1 and 0 respectively, and format other values as the plain numeric value instead.
Fixes rdar://24809994
llvm-svn: 263604
This fixes a recently reported a bug(https://llvm.org/bugs/show_bug.cgi?id=26790) relating to the clang expression evaluator no longer being able to resolve calls to
functions with arguments to typedefed anonymous structs, unions, or enums after a cleanup to the expression parsing code in r260768
This fixes the issue by attaching the tagged name to the original clang::TagDecl object when generating the typedef in lldb::ClangAstContext::CreateTypeDef.
This also fixes the issue for anonymous typedefs for non-struct types (unions and enums) where we have a tag name.
Author: Luke Drummond <luke.drummond@codeplay.com>
Differential Revision: http://reviews.llvm.org/D18099
llvm-svn: 263544
It would be nice to have a longer-term plan for how to handle help for regular expression commands, since their syntax is highly irregular. I can see a few options (*), but for now this is a reasonable stop-gag measure for the most blatant regression.
(*) the simplest is, of course, to detect a regex command and inherit the syntax for any aliases thereof; it would be nice if this also didn't show the underlying regex command name when the alias is used
llvm-svn: 263523
This cleans things up such CommandAlias essentially can work as its own object; the aliases still live in a separate map, but are now just full-fledged CommandObjectSPs
This patch also cleans up help generation for aliases, allows aliases to vend their own help, and adds a tweak such that "dash-dash aliases", such as po, don't show the list of options for their underlying command, since those can't be provided anyway
I plan to fix up a few more things here, and then add a test case and proclaim victory
llvm-svn: 263499
On FreeBSD _LIBCPP_EXTERN_TEMPLATE is being defined from something
included by lldb/lldb-private.h. Undefine it after the #include to avoid
the redefinition warning.
Differential Revision: http://reviews.llvm.org/D17402
llvm-svn: 263486
Build-id support is being added to lld and by default it may produce a
64-bit build-id.
Prior to this change lldb would reject such a build-id. However, it then
falls back to a 4-byte crc32, which is a poorer quality identifier.
Differential Revision: http://reviews.llvm.org/D18096
llvm-svn: 263432
Turns out that most of the code that runs expressions (e.g. the ObjC runtime grubber) on
behalf of the expression parser was using the currently selected thread. But sometimes,
e.g. when we are evaluating breakpoint conditions/commands, we don't select the thread
we're running on, we instead set the context for the interpreter, and explicitly pass
that to other callers. That wasn't getting communicated to these utility expressions, so
they would run on some other thread instead, and that could cause a variety of subtle and
hard to reproduce problems.
I also went through the commands and cleaned up the use of GetSelectedThread. All those
uses should have been trying the thread in the m_exe_ctx belonging to the command object
first. It would actually have been pretty hard to get misbehavior in these cases, but for
correctness sake it is good to make this usage consistent.
<rdar://problem/24978569>
llvm-svn: 263326
Summary:
This fixes a couple of corner cases in FileSpec, related to AppendPathComponent and
handling of root directory (/) file spec. I add a bunch of unit tests for the new behavior.
Summary of changes:
FileSpec("/bar").GetCString(): before "//bar", after "/bar".
FileSpec("/").CopyByAppendingPathComponent("bar").GetCString(): before "//bar", after "/bar".
FileSpec("C:", ePathSyntaxWindows).CopyByAppendingPathComponent("bar").GetCString(): before "C:/bar", after "C:\bar".
Reviewers: clayborg, zturner
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D18044
llvm-svn: 263207
When the parent of an expression is anonymous, skip adding '.' or '->' before the expression name.
Differential Revision: http://reviews.llvm.org/D18005
llvm-svn: 263166
Removed lldb_private::File::Duplicate() and the copy constructor and the assignment operator that used to duplicate the file handles and made them private so no one uses them. Previously the lldb_private::File::Duplicate() function duplicated files that used file descriptors, (int) but not file streams (FILE *), so the lldb_private::File::Duplicate() function only worked some of the time. No one else excep thee ScriptInterpreterPython was using these functions, so that aren't needed nor desired. Previously every time you would drop into the python interpreter we would duplicate files, and now we avoid this file churn.
<rdar://problem/24877720>
llvm-svn: 263161
Fix a problem raised with the previous patches being applied in the wrong order.
Committed on behalf of: Dean De Leo <dean@codeplay.com>
llvm-svn: 263134
This commit implements the reading of stack spilled function arguments for little endian MIPS targets.
Committed on behalf of: Dean De Leo <dean@codeplay.com>
llvm-svn: 263131
This commit implements the reading of stack spilled function arguments for little endian MIPS targets.
Committed on behalf of: Dean De Leo <dean@codeplay.com>
llvm-svn: 263130
Currently it is not specified, and since allocations are usually
requested once we hit a renderscript breakpoint, the language will be
inferred being as renderscript by the ExpressionParser.
Actually allocations attempt to invoke functions part of the RS runtime,
written in C/C++, so evaluating the calls in RenderScript could be
misleading.
In particular, in MIPS, the ABI between C/C++ (mips o32) and
renderscript (arm) might introduce subtle bugs when evaluating such
expressions.
This change explicitly sets the language used to evaluate the allocations
as C++.
Committed on behalf of: Dean De Leo <dean@codeplay.com>
llvm-svn: 263129
The current expression language is currently tracked in a few places within the ClangExpressionParser constructor.
This patch adds a private lldb::LanguageType attribute to the ClangExpressionParser class and tracks the expression language from that one place.
Author: Luke Drummond <luke.drummond@codeplay.com>
Differential Revision: http://reviews.llvm.org/D17719
llvm-svn: 263099
Summary:
GCC does not emit DW_AT_data_member_location for members of a union.
Starting with a 0 value for member locations helps is reading union types
in such cases.
Reviewers: clayborg
Subscribers: ldrumm, lldb-commits
Differential Revision: http://reviews.llvm.org/D18008
llvm-svn: 263085
Previously line table parsing code assumed that the only gaps would
occur at the end of functions. In practice this isn't true, so this
patch makes the line table parsing more robust in the face of
functions with non-contiguous byte arrangements.
llvm-svn: 263078
Summary:
From Adrian McCarthy:
"Running ninja check-lldb now has one crash in a Python process, due to deferencing a null pointer in IRExecutionUnit.cpp: candidate_sc.symbol is null, which leads to a call with a null this pointer."
Reviewers: zturner, spyffe, amccarth
Subscribers: ted, jingham, lldb-commits
Differential Revision: http://reviews.llvm.org/D17860
llvm-svn: 263066
That way you can set offset breakpoints that will move as the function they are
contained in moves (which address breakpoints can't do...)
I don't align the new address to instruction boundaries yet, so you have to get
this right yourself for now.
<rdar://problem/13365575>
llvm-svn: 263049
The next step is to actually turn CommandAlias into a full-blown CommandObject citizen.
This is tricky given the current architecture of the CommandInterpreter but I think I have found a reasonable path forward.
The current plan is to make class CommandAlias : public CommandObject, and have all the several GetCommand calls not actually traverse through the alias to the underlying command object
The only times that an alias will be traversed are:
a) execution; when time comes to run an alias, I will just grab the underlying command and options, and make the interpreter execute that according to its current algorithm
b) subcommand traversal; if one has an alias to a multiword command, grabbing a subcommand will see through to the subcommand
Other operations, e.g. command listing, command names, command helps, ..., will all use the alias directly. This will, in turn, lead to the removal of the separate alias dictionary, and just mix user commands and aliases in one map
llvm-svn: 262986
The System-V x86_64 ABI requires floating point values to be passed
in 128-but SSE vector registers (xmm0, ...). When printing such a
variable this currently yields an <invalid load address>.
This patch makes LLDB's DWARF expression evaluator accept 128-bit
registers as scalars. It also relaxes the check that the size of the
result of the DWARF expression be equal to the size of the variable to a
greater-than. DWARF defers to the ABI how smaller values are being placed
in a larger register.
Implementation note: I found the code in Value::SetContext() that changes
the m_value_type after the fact to be questionable. I added a sanity check
that the Value's memory buffer has indeed been written to (this is
necessary, because we may have a scalar value in a vector register), but
really I feel like this is the wrong place to be setting it.
Reviewed by Greg Clayton.
http://reviews.llvm.org/D17897
rdar://problem/24944340
llvm-svn: 262947
- move alias help generation to CommandAlias, out of CommandInterpreter
- make alias creation use argument strings instead of OptionArgVectorSP; the former is a more reasonable currency than the latter
- remove m_is_alias from CommandObject, it wasn't actually being used
llvm-svn: 262912
Eventually, there will be more things that CommandAlias contains, and I don't want accessors for each of them on the CommandIntepreter
Eventually, we also won't pass around copies of CommandAlias, but that's for a later patch
llvm-svn: 262909
Right now, obviously, this is just the pair of (CommandObjectSP,OptionArgVectorSP), so NFC
This is step one of a larger - and tricky - refactoring which will turn command aliases into interesting objects instead of passive storage that the command interpreter does smart things to
This refactoring, in turn, will allow us to do interesting things with aliases, such as intelligent and customizable help
llvm-svn: 262900
to each other. This should remove some infrequent teardown crashes when the
listener is not the debugger's listener.
Processes now need to take a ListenerSP, not a Listener&.
This required changing over the Process plugin class constructors to take a ListenerSP, instead
of a Listener&. Other than that there should be no functional change.
<rdar://problem/24580184> CrashTracer: [USER] Xcode at …ework: lldb_private::Listener::BroadcasterWillDestruct + 39
llvm-svn: 262863
LLDB can remap a source file to a new directory based on the
"target.sorce-map" to handle the usecase when the source code moved
between the compliation and the debugging. Previously the remapping
was only used to display the content of the file. This CL fixes the
scenario when a breakpoint is set based on the new an absolute path
with adding an inverse remapping step before looking up the breakpoint
location.
Differential revision: http://reviews.llvm.org/D17848
llvm-svn: 262711
PDB is Microsoft's debug information format, and although we
cannot yet generate it, we still must be able to consume it.
Reason for this is that debug information for system libraries
(e.g. kernel32, C Runtime Library, etc) only have debug info
in PDB format, so in order to be able to support debugging
of system code, we must support it.
Currently this code should compile on every platform, but on
non-Windows platforms the PDB plugin will return 0 capabilities,
meaning that for now PDB is only supported on Windows. This
may change in the future, but the API is designed in such a way
that this will require few (if any) changes on the LLDB side.
In the future we can just flip a switch and everything will
work.
This patch only adds support for line tables. It does not return
information about functions, types, global variables, or anything
else. This functionality will be added in a followup patch.
Differential Revision: http://reviews.llvm.org/D17363
Reviewed by: Greg Clayton
llvm-svn: 262528
Previously we were using thumbv7 and armv8.1a what ended up showing a
few undefined instruction when disassembling code. This CL update the
architectures used to armv8.2a and thumbv8.2a (newest available) so we
display all instruction in the disassambly.
llvm-svn: 262482
Summary: Recent changes to the expression parser broke function name resolution when using the IR interpreter instead of JIT. This patch changes the IRMemoryMap ivar in InterpreterStackFrame to an IRExecutionUnitSP (which is a subclass), allowing InterpreterStackFrame::ResolveConstantValue() to call FindSymbol() on the name of the Value when it's a FunctionVal. It also changes IRExecutionUnit::FindInSymbols() to call GetFileAddress() on the symball if ResolveCallableAddress() fails and there is no valid Process.
Reviewers: spyffe
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D17745
llvm-svn: 262407
If we have a TargetLoadAddress on the top of the DWARF stack then a
DW_OP_plus or a DW_OP_plus_ucons sholudn't dereference (resolve) it
and then add the value to the dereferenced value but it should offset
the load address by the specified constant.
llvm-svn: 262339
This is useful in cases such as, e.g.
(lldb) help NSString
(the user meant type lookup)
or
(lldb) help kill
(the user is looking for process kill)
Fixes rdar://24868537
llvm-svn: 262271
This makes it so that help language provides help on the language command and help source-language provides the list of source languages one can pass as an option
Fixes rdar://24869942
llvm-svn: 262259
This is a mechanical refactor. There should be no functional changes in this commit.
Instead of encapsulating just the Windows-specific data, ProcessWinMiniDump now uses a private implementation class. This reduces indirections (in the source). It makes it easier to add private helper methods without touching the header and allows them to have platform-specific types as parameters. The only trick was that the pimpl class needed a back pointer in order to call a couple methods.
llvm-svn: 262256
The evaluation of expressions containing register values was broken for targets for which endianness differs from host.
Committed on behalf of: mamai <marianne.mailhot.sarrasin@gmail.com>
Differential revision: http://reviews.llvm.org/D17167
llvm-svn: 262041
(lldb) command_that_steps_process_thousands_of_times
As the "command_that_steps_process_thousands_of_times" could be a python command that resumed the process thousands of times and in doing so the IOHandlerProcessSTDIO would get pushed when the process resumed, and popped when it stoppped, causing the call to IOHandlerProcessSTDIO::Cancel(). Since the IOHandler thread is currently in IOHandlerEditline::Run() for the command interpreter handling the "command_that_steps_process_thousands_of_times" command, IOHandlerProcessSTDIO::Run() would never get called, even though the IOHandlerProcessSTDIO is on the top of the stack. This caused the command pipe to keep getting 1 bytes written each time the IOHandlerProcessSTDIO::Cancel() was called and eventually we will deadlock since the write buffer is full.
The fix here is to make sure we are in IOHandlerProcessSTDIO::Run() before we write anything to the command pipe, and just call SetIsDone(true) if we are not.
<rdar://problem/22361364>
llvm-svn: 262040
The software breakpoint definitions for mips32 should have been included in my
recent patch that moved the software breakpoint definitions into the base platform
class.
llvm-svn: 262021
The purpose of these plugins is to make LLDB capable of debugging java
code JIT-ed by the android runtime.
Differential revision: http://reviews.llvm.org/D17616
llvm-svn: 262015
Additionally fix the type of some dwarf expression where we had a
confusion between scalar and load address types after a dereference.
Differential revision: http://reviews.llvm.org/D17604
llvm-svn: 262014
Summary: This fixes the 'p' command which should be aliased to 'expresion --'.
Reviewers: jingham
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D17634
llvm-svn: 261969
to allow you to step through a complex calling sequence into a particular function that may span multiple lines. Also some
test cases for this and the --step-target feature.
llvm-svn: 261953
Most address represented in lldb as section plus offset and handling of
absolute addresses is problematic in several location because of lack
of necessary information (e.g. Target) or because of performance issues.
This CL change the way ObjectFileELF handle the absolute symbols with
creating a pseudo section for each symbol. With this change all existing
code designed to work with addresses in the form of section plus offset
will work with absolute symbols as well.
Differential revision: http://reviews.llvm.org/D17450
llvm-svn: 261859
DWARF stores this information in the DW_AT_start_scope attribute. This
CL add support for this attribute and also changes the functions
displaying frame variables to only display the variables currently in
scope.
Differential revision: http://reviews.llvm.org/D17449
llvm-svn: 261858
32-bit processes on 64-bit Windows run in a layer called WoW64 (Windows-on-Windows64). If you capture a mini dump of such a process from a 32-bit debugger, you end up with a register context for the 64-bit WoW64 process rather than the 32-bit one you probably care about.
This detects WoW64 by looking to see if there's a module named wow64.dll loaded. For such processes, it then looks in the 64-bit Thread Environment Block (TEB) to locate a copy of the 32-bit CONTEXT record that the plugin needs for the register context.
Added some rudimentary tests. I'd like to improve these later once we figure out how to get the exception information from these mini dumps.
Differential Revision: http://reviews.llvm.org/D17465
llvm-svn: 261808
Paths on Windows are not case-sensitive. Because of this, if a file
is called main.cpp, you should be able to set a breakpoint on it
by using the name Main.cpp. In an ideal world, you could just
tell people to match the case, but in practice this can be a real
problem as it requires you to know whether the person who compiled
the program ran "clang++ main.cpp" or "clang++ Main.cpp", both of
which would work, regardless of what the file was actually called.
This fixes http://llvm.org/pr22667
Patch by Petr Hons
Differential Revision: http://reviews.llvm.org/D17492
Reviewed by: zturner
llvm-svn: 261771
Mips64 tests were failing on windows because the sscanf implementation differs between clang/gcc/msvc such that on windows %lx specifies a 32bits parameter and %llx is for 64bits. For us this meant that 64bit pointers were being truncated to 32bits on their way into a JIT'd expression.
llvm-svn: 261741
IRExecutionUnit previously replicated a bunch of logic that already
existed elsewhere for the purpose of getting a load address for a
symbol. This approach failed to resolve certain types of symbols.
Instead, we now use functions on SymbolContext to do the address
resolution.
This is a cleanup of IRExecutionUnit::FindInSymbols, and also fixes a
latent bug where we looked at the wrong SymbolContext to determine
whether or not it is external.
<rdar://problem/24770829>
llvm-svn: 261704
Summary:
On arm64, linux<=4.4 and Android<=M there is a bug, which prevents single-stepping from working when
the system comes back from suspend, because of incorrectly initialized CPUs. This did not really
affect Android<M, because it did not use software suspend, but it is a problem for M, which uses
suspend (doze) quite extensively. Fortunately, it seems that the first CPU is not affected by
this bug, so this commit implements a workaround by forcing the inferior to execute on the first
cpu whenever we are doing single stepping.
While inside, I have moved the implementations of Resume() and SingleStep() to the thread class
(instead of process).
Reviewers: tberghammer, ovyalov
Subscribers: aemerson, rengolin, tberghammer, danalbert, srhines, lldb-commits
Differential Revision: http://reviews.llvm.org/D17509
llvm-svn: 261636
Summary:
Signalfd is not used in the code anymore, and given that the same functionality can be achieved
with the new MainLoop class, it's unlikely we will need it in the future. Remove all traces of
it.
Reviewers: tberghammer, ovyalov
Subscribers: tberghammer, danalbert, srhines, lldb-commits
Differential Revision: http://reviews.llvm.org/D17510
llvm-svn: 261631
Inline functions in DWARF have AT_abstract_origin set, but we only handled that
if the functions were C++ methods. Inline functions -- C or C++ -- have this
also, and as a result they got one FunctionDecl for each inlined instance. When
going to construct the locals, this meant that the arguments (which did properly
have their abstract origins handled) would get associated with the master
FunctionDecl, and the inlined FunctionDecls would all appear to have no locals.
This manifested as not being able to look up local variables when stopped in an
inline fuunction. We should have had a test for this, but somewhere along the
line the relevant test case lost its .py file (or it never had one).
This patch fixes this problem and restores the .py file.
<rdar://problem/24712434>
llvm-svn: 261598
This patch aims to reduce the code duplication among all of the platforms in GetSoftwareBreakpointTrapOpcode by pushing all common code into the Platform base class.
Differential Revision: http://reviews.llvm.org/D17395
llvm-svn: 261536
This patches does the following:
+ fix return type: ClangExpressionParser::Parse returns unsigned, but was actually returning a signed value, num_errors.
+ use helper clang::TextDiagnosticBuffer::getNumErrors() instead of counting the errors ourself.
+ limit scoping of block-level automatic variables as much as practical.
+ remove reused multipurpose TextDiagnosticBuffer::const_iterator in favour of loop-scoped err, warn, and note variables in the diagnostic printing code.
+ refactor diagnostic printing loops to use a proper loop invariant.
Author: Luke Drummond <luke.drummond@codeplay.com>
Differential Revision: http://reviews.llvm.org/D17273
llvm-svn: 261345
[git 65dafa83] introduced the GetBuiltinIncludePath function copied from cfe/lib/Driver/CC1Options.cpp
This function is no longer used in lldb's expression parser and I believe it is safe to remove it.
Author: Luke Drummond <luke.drummond@codeplay.com>
Differential Revision: http://reviews.llvm.org/D17266
llvm-svn: 261328
This change is improving the instruction emulation based unwinding to
handle when the frame pointer is adjusted (increment/decrement) after
it has been initialized. The situation can occur in the prologue of
some function where FP is adjusted before it is copied back to SP.
Example code (thumb, generated by gcc 4.8):
< +0>: push {r4, r7, lr}
< +2>: sub sp, #0x14
< +4>: add r7, sp, #0x0
...
<+50>: adds r7, #0x14 ; The CL fixes the handling of this instruction
<+52>: mov sp, r7 ; Previously unwinding from here was broken
<+54>: pop {r4, r7, pc}
Differential revision: http://reviews.llvm.org/D17295
llvm-svn: 261318
working directory by default -- a typical security problem that we
need to be more conservative about.
It adds a new target setting, target.load-cwd-lldbinit which may
be true (always read $cwd/.lldbinit), false (never read $cwd/.lldbinit)
or warn (warn if there is a $cwd/.lldbinit and don't read it). The
default is set to warn. If this is met with unhappiness, we can look
at changing the default to true (to match current behavior) on a
different platform.
This does not affect reading of ~/.lldbinit - that will still be read,
as before. If you run lldb in your home directory, it will not warn
about the presence of a .lldbinit file there.
I had to add two SB API - SBHostOS::GetUserHomeDirectory and
SBFileSpec::AppendPathComponent - for the lldb driver code to be
able to get the home directory path in an OS neutral manner.
The warning text is
There is a .lldbinit file in the current directory which is not being read.
To silence this warning without sourcing in the local .lldbinit,
add the following to the lldbinit file in your home directory:
settings set target.load-cwd-lldbinit false
To allow lldb to source .lldbinit files in the current working directory,
set the value of this variable to true. Only do so if you understand and
accept the security risk.
<rdar://problem/24199163>
llvm-svn: 261280
Ulrich Weigand