Added a way to set hardware breakpoints from the "breakpoint set" command with the new "--hardware" option. Hardware breakpoints are not a request, they currently are a requirement. So when breakpoints are specified as hardware breakpoints, they might fail to be set when they are able to be resolved and should be used sparingly. This is currently hooked up for GDB remote debugging.
Linux and FreeBSD should quickly enable this feature if possible, or return an error for any breakpoints that are hardware breakpoint sites in the "virtual Error Process::EnableBreakpointSite (BreakpointSite *bp_site);" function.
llvm-svn: 192491
Based on the POSIX x86_64 register context. This is sufficient for opening
a mips64 (big endian) core file. Subsequent changes will connect the
disassembler, dynamic loader support, ABI, etc.
Review: http://llvm-reviews.chandlerc.com/D1873
llvm-svn: 192335
- By default, the above function will wait for at least one event
- Set wait_always=false to make the function return immediately if the process is already stopped
llvm-svn: 192301
Implement SBTarget::CreateValueFromAddress() with a behavior equivalent to SBValue::CreateValueFromAddress()
(but without the need to grab an SBValue first just as a starting point to make up another SBValue out of whole cloth)
llvm-svn: 192239
to be explicit, to prevent horrid things like
std::string a = ConstString("foo")
from taking the path ConstString -> bool -> char
-> std::string.
This fixes, among other things, ClangFunction.
<rdar://problem/15137989>
llvm-svn: 191934
not have breakpoints set on it inserted into code that does have a valid line number. So allow
that line number, and the ThreadPlanStepRange should just continue stepping over 0 line ranges
as if they had the same line number as whatever we were previously stepping through.
llvm-svn: 191477
Now that SBValues can be setup to ignore synthetic values, this is no longer necessary, and so m_suppress_synthetic_value can go away
Another Hack Bites the Dust
llvm-svn: 191338
- searches frames beginning from the current frame, stops when an equivalent context is found
- not using GetStackFrameCount() for performance reasons
- fixes TestInlineStepping (clang/gcc buildbots)
llvm-svn: 190868
with prefer_file_cache == false. This is what we want to do when
the user is doing a disassemble command -- show the actual memory
contents in case the memory has been corrupted or something -- but
when we're profiling functions for stepping or unwinding
(ThreadPlanStepRange::GetInstructionsForAddress,
UnwindAssemblyInstEmulation::GetNonCallSiteUnwindP) we can read
__TEXT instructions directly out of the file, if it exists.
<rdar://problem/14397491>
llvm-svn: 190638
This allows the PC to be directly changed to a different line.
It's similar to the example python script in examples/python/jump.py, except implemented as a builtin.
Also this version will track the current function correctly even if the target line resolves to multiple addresses. (e.g. debugging a templated function)
llvm-svn: 190572
setting of the environment variable COMMAND_MODE. Changed the Platform::GetResumeCountForShell
to Platform::GetResumeCountForLaunchInfo, and check both the shell and in the case of
/bin/sh the environment as well.
llvm-svn: 190538
that /bin/sh re-exec's itself to /bin/bash, so it needs one more resume when you
are using it as the shell than /bin/bash did or you will stop at the start of your
program, rather than running it.
So I added a Platform API to get the number of resumes needed when launching with
a particular shell, and set the right values for Mac OS X.
<rdar://problem/14935282>
llvm-svn: 190381
From Jim's post on the lldb-dev mailing list:
This code is there as a backstop for when the unwinder drops a frame at
the beginning of new function/trampoline or whatever.
In the (older_ctx_is_equivalent == false) case we will see if we are at
a trampoline function that somebody knows how to get out of, and
otherwise we will stop.
llvm-svn: 190149
/bin/sh is more portable, and all systems with /bin/bash are expected to
have /bin/sh as well, even if only a link to bash.
Review: http://llvm-reviews.chandlerc.com/D1576
llvm-svn: 189879
Summary:
This merge brings in the improved 'platform' command that knows how to
interface with remote machines; that is, query OS/kernel information, push
and pull files, run shell commands, etc... and implementation for the new
communication packets that back that interface, at least on Darwin based
operating systems via the POSIXPlatform class. Linux support is coming soon.
Verified the test suite runs cleanly on Linux (x86_64), build OK on Mac OS
X Mountain Lion.
Additional improvements (not in the source SVN branch 'lldb-platform-work'):
- cmake build scripts for lldb-platform
- cleanup test suite
- documentation stub for qPlatform_RunCommand
- use log class instead of printf() directly
- reverted work-in-progress-looking changes from test/types/TestAbstract.py that work towards running the test suite remotely.
- add new logging category 'platform'
Reviewers: Matt Kopec, Greg Clayton
Review: http://llvm-reviews.chandlerc.com/D1493
llvm-svn: 189295
Improve the documentation for the new target.memory-module-load-level setting, and also return an error when there is no nlist data when appropriate.
llvm-svn: 188317
LLDB needs in memory module load level settings to control how much information is read from memory when loading in memory modules. This change adds a new setting:
(lldb) settings set target.memory-module-load-level [minimal|partial|complete]
minimal will load only sections (no symbols, or function bounds via function starts or EH frame)
partial will load sections + bounds
complete will load sections + bounds + symbols
llvm-svn: 188246
- Immediates can be shown as hex (either Intel or MASM style)
- See TestSettings.py for usage examples
- Verified to cause no regressions on Linux x86_64 (Ubuntu 12.10)
Patch by Richard Mitton!
llvm-svn: 187921
Created new LinuxThread class inherited from POSIXThread and removed linux / freebsd ifdefs
Removed several un-needed set thread name calls
CR (and multiple suggestions): mkopec
llvm-svn: 187545
- this fix ensures the ThreadList mutex is always locked before the StackFrameList mutex
Situation where deadlock could occur (without this fix):
Thread 1 is in Process::WillResume and locks the ThreadList mutex (on entry), and subsequently calls StackFrameList::Clear() which locks the StackFrameList mutex.
Meanwhile, thread 2 is in Process::RunThreadPlan and calls Thread::SetSelectedFrame() (which locks the StackFrameList mutex) before calling GetSelectedThread (which attempts to lock the ThreadList mutex)
In my testing on both Linux and Mac OS X, I was unable to reproduce any hangs with this patch applied.
llvm-svn: 187522
list have a shared pointer back to their DisassemblerLLVMC. This checkin force clears the InstructionList
in all the places we use the DisassemblerSP to stop the leaking for now. I'll go back and fix this
for real when I have time to do so.
<rdar://problem/14581918>
llvm-svn: 187473
Fixed a crasher when using memory threads where a thread is sticking around too long and was causing problems when it didn't have a thread plan.
llvm-svn: 187395
LLDB requires that the inferior process be stopped before, and remain
stopped during, certain accesses to process state.
Previously this was achieved with a POSIX rwlock which had a write lock
taken for the duration that the process was running, and released when
the process was stopped. Any access to process state was performed with
a read lock held.
However, POSIX requires that pthread_rwlock_unlock() be called from the
same thread as pthread_rwlock_wrlock(), and lldb needs to stop and start
the process from different threads. Violating this constraint is
technically undefined behaviour, although as it happens Linux and Darwin
result in the unlock proceeding in this case. FreeBSD follows POSIX
more strictly, and the unlock would fail, resulting in a hang later upon
the next attempt to take the lock.
All read lock consumers use ReadTryLock() and handle failure to obtain
the lock (typically by logging an error "process is running"). Thus,
instead of using the lock state itself to track the running state, this
change adds an explicit m_running flag. ReadTryLock tests the flag, and
if the process is not running it returns with the read lock held.
WriteLock and WriteTryLock are renamed to SetRunning and TrySetRunning,
and (if successful) they set m_running with the lock held. This way,
read consumers can determine if the process is running and act
appropriately, and write consumers are still held off from starting the
process if read consumers are active.
Note that with this change there are still some curious access patterns,
such as calling WriteUnlock / SetStopped twice in a row, and there's no
protection from multiple threads trying to simultaneously start the
process. In practice this does not seem to be a problem, and was
exposing other undefined POSIX behaviour prior to this change.
llvm-svn: 187377
and so the StackID changes with every step. Do so by checking the parent frame ID, and if it hasn't changed,
then we haven't stepped in.
rdar://problem/14516227
llvm-svn: 187094
plan providers from a "ThreadPlan *" to a "lldb::ThreadPlanSP". That was needed to fix
a bug where the ThreadPlanStepInRange wasn't checking with its sub-plans to make sure they
succeed before trying to proceed further. If the sub-plan failed and as a result didn't make
any progress, you could end up retrying the same failing algorithm in an infinite loop.
<rdar://problem/14043602>
llvm-svn: 186618
- MachO files now correctly extract the UUID all the time
- More file size and offset verification done for universal mach-o files to watch for truncated files
- ObjectContainerBSDArchive now supports enumerating all objects in BSD archives (.a files)
- lldb_private::Module() can not be properly constructed using a ModuleSpec for a .o file in a .a file
- The BSD archive plug-in shares its cache for GetModuleSpecifications() and the create callback
- Improved printing for ModuleSpec objects
llvm-svn: 186211
A long time ago we start with clang types that were created by the symbol files and there were many functions in lldb_private::ClangASTContext that helped. Later we create ClangASTType which contains a clang::ASTContext and an opauque QualType, but we didn't switch over to fully using it. There were a lot of places where we would pass around a raw clang_type_t and also pass along a clang::ASTContext separately. This left room for error.
This checkin change all type code over to use ClangASTType everywhere and I cleaned up the interfaces quite a bit. Any code that was in ClangASTContext that was type related, was moved over into ClangASTType. All code that used these types was switched over to use all of the new goodness.
llvm-svn: 186130
ensure that the watchpoint not the step is reported as the stop reason. Also, stash away & restore
the current stop reason just so it can't go away on us.
llvm-svn: 185474
bother checking if a region is safe to use. In
cases where regions need to be synthesized rather
than properly allocated, the memory reads required
to determine whether the area is used are
- insufficient, because intermediate locations
could be in use, and
- unsafe, because on some platforms reading from
memory can trigger events.
All this only makes a difference on platforms
where memory allocation in the target is impossible.
Behavior on platforms where it is possible should
stay the same.
<rdar://problem/14023970>
llvm-svn: 185046
Made sure that temporary object created from HarmonizeThreadIdsForProfileData() doesn’t get passed around without creating an object first.
Reviewed by Greg
llvm-svn: 184769
Greg Clayton