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llvm-project/lldb/scripts/interface/SBThread.i

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//===-- SWIG Interface for SBThread -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
namespace lldb {
%feature("docstring",
"Represents a thread of execution. SBProcess contains SBThread(s).
SBThreads can be referred to by their ID, which maps to the system specific thread
identifier, or by IndexID. The ID may or may not be unique depending on whether the
system reuses its thread identifiers. The IndexID is a monotonically increasing identifier
that will always uniquely reference a particular thread, and when that thread goes
away it will not be reused.
SBThread supports frame iteration. For example (from test/python_api/
lldbutil/iter/TestLLDBIterator.py),
from lldbutil import print_stacktrace
stopped_due_to_breakpoint = False
for thread in process:
if self.TraceOn():
print_stacktrace(thread)
ID = thread.GetThreadID()
if thread.GetStopReason() == lldb.eStopReasonBreakpoint:
stopped_due_to_breakpoint = True
for frame in thread:
self.assertTrue(frame.GetThread().GetThreadID() == ID)
if self.TraceOn():
print frame
self.assertTrue(stopped_due_to_breakpoint)
See also SBProcess and SBFrame."
) SBThread;
class SBThread
{
public:
//------------------------------------------------------------------
// Broadcaster bits.
//------------------------------------------------------------------
enum
{
eBroadcastBitStackChanged = (1 << 0),
eBroadcastBitThreadSuspended = (1 << 1),
eBroadcastBitThreadResumed = (1 << 2),
eBroadcastBitSelectedFrameChanged = (1 << 3),
eBroadcastBitThreadSelected = (1 << 4)
};
SBThread ();
SBThread (const lldb::SBThread &thread);
~SBThread();
static const char *
GetBroadcasterClassName ();
static bool
EventIsThreadEvent (const SBEvent &event);
static SBFrame
GetStackFrameFromEvent (const SBEvent &event);
static SBThread
GetThreadFromEvent (const SBEvent &event);
bool
IsValid() const;
void
Clear ();
lldb::StopReason
GetStopReason();
%feature("docstring", "
/// Get the number of words associated with the stop reason.
/// See also GetStopReasonDataAtIndex().
") GetStopReasonDataCount;
size_t
GetStopReasonDataCount();
%feature("docstring", "
//--------------------------------------------------------------------------
/// Get information associated with a stop reason.
///
/// Breakpoint stop reasons will have data that consists of pairs of
/// breakpoint IDs followed by the breakpoint location IDs (they always come
/// in pairs).
///
/// Stop Reason Count Data Type
/// ======================== ===== =========================================
/// eStopReasonNone 0
/// eStopReasonTrace 0
/// eStopReasonBreakpoint N duple: {breakpoint id, location id}
/// eStopReasonWatchpoint 1 watchpoint id
/// eStopReasonSignal 1 unix signal number
/// eStopReasonException N exception data
/// eStopReasonExec 0
/// eStopReasonPlanComplete 0
//--------------------------------------------------------------------------
") GetStopReasonDataAtIndex;
uint64_t
GetStopReasonDataAtIndex(uint32_t idx);
%feature("autodoc", "
Collects a thread's stop reason extended information dictionary and prints it
into the SBStream in a JSON format. The format of this JSON dictionary depends
on the stop reason and is currently used only for instrumentation plugins.
") GetStopReasonExtendedInfoAsJSON;
bool
GetStopReasonExtendedInfoAsJSON (lldb::SBStream &stream);
%feature("autodoc", "
Pass only an (int)length and expect to get a Python string describing the
stop reason.
") GetStopDescription;
size_t
GetStopDescription (char *dst, size_t dst_len);
SBValue
GetStopReturnValue ();
%feature("autodoc", "
Returns a unique thread identifier (type lldb::tid_t, typically a 64-bit type)
for the current SBThread that will remain constant throughout the thread's
lifetime in this process and will not be reused by another thread during this
process lifetime. On Mac OS X systems, this is a system-wide unique thread
identifier; this identifier is also used by other tools like sample which helps
to associate data from those tools with lldb. See related GetIndexID.
")
GetThreadID;
lldb::tid_t
GetThreadID () const;
%feature("autodoc", "
Return the index number for this SBThread. The index number is the same thing
that a user gives as an argument to 'thread select' in the command line lldb.
These numbers start at 1 (for the first thread lldb sees in a debug session)
and increments up throughout the process lifetime. An index number will not be
reused for a different thread later in a process - thread 1 will always be
associated with the same thread. See related GetThreadID.
This method returns a uint32_t index number, takes no arguments.
")
GetIndexID;
uint32_t
GetIndexID () const;
const char *
GetName () const;
%feature("autodoc", "
Return the queue name associated with this thread, if any, as a str.
For example, with a libdispatch (aka Grand Central Dispatch) queue.
") GetQueueName;
const char *
GetQueueName() const;
%feature("autodoc", "
Return the dispatch_queue_id for this thread, if any, as a lldb::queue_id_t.
For example, with a libdispatch (aka Grand Central Dispatch) queue.
") GetQueueID;
lldb::queue_id_t
GetQueueID() const;
%feature("autodoc", "
Takes a path string and a SBStream reference as parameters, returns a bool.
Collects the thread's 'info' dictionary from the remote system, uses the path
argument to descend into the dictionary to an item of interest, and prints
it into the SBStream in a natural format. Return bool is to indicate if
anything was printed into the stream (true) or not (false).
") GetInfoItemByPathAsString;
bool
GetInfoItemByPathAsString (const char *path, lldb::SBStream &strm);
%feature("autodoc", "
Return the SBQueue for this thread. If this thread is not currently associated
with a libdispatch queue, the SBQueue object's IsValid() method will return false.
If this SBThread is actually a HistoryThread, we may be able to provide QueueID
and QueueName, but not provide an SBQueue. Those individual attributes may have
been saved for the HistoryThread without enough information to reconstitute the
entire SBQueue at that time.
This method takes no arguments, returns an SBQueue.
") GetQueue;
lldb::SBQueue
GetQueue () const;
void
StepOver (lldb::RunMode stop_other_threads = lldb::eOnlyDuringStepping);
void
StepInto (lldb::RunMode stop_other_threads = lldb::eOnlyDuringStepping);
void
StepInto (const char *target_name, lldb::RunMode stop_other_threads = lldb::eOnlyDuringStepping);
void
StepOut ();
void
StepOutOfFrame (lldb::SBFrame &frame);
void
StepInstruction(bool step_over);
SBError
StepOverUntil (lldb::SBFrame &frame,
lldb::SBFileSpec &file_spec,
uint32_t line);
SBError
StepUsingScriptedThreadPlan (const char *script_class_name);
SBError
JumpToLine (lldb::SBFileSpec &file_spec, uint32_t line);
void
RunToAddress (lldb::addr_t addr);
%feature("autodoc", "
Force a return from the frame passed in (and any frames younger than it)
without executing any more code in those frames. If return_value contains
a valid SBValue, that will be set as the return value from frame. Note, at
present only scalar return values are supported.
") ReturnFromFrame;
SBError
ReturnFromFrame (SBFrame &frame, SBValue &return_value);
%feature("docstring", "
//--------------------------------------------------------------------------
/// LLDB currently supports process centric debugging which means when any
/// thread in a process stops, all other threads are stopped. The Suspend()
/// call here tells our process to suspend a thread and not let it run when
/// the other threads in a process are allowed to run. So when
/// SBProcess::Continue() is called, any threads that aren't suspended will
/// be allowed to run. If any of the SBThread functions for stepping are
/// called (StepOver, StepInto, StepOut, StepInstruction, RunToAddres), the
/// thread will now be allowed to run and these functions will simply return.
///
/// Eventually we plan to add support for thread centric debugging where
/// each thread is controlled individually and each thread would broadcast
/// its state, but we haven't implemented this yet.
///
/// Likewise the SBThread::Resume() call will again allow the thread to run
/// when the process is continued.
///
/// Suspend() and Resume() functions are not currently reference counted, if
/// anyone has the need for them to be reference counted, please let us
/// know.
//--------------------------------------------------------------------------
") Suspend;
bool
Suspend();
bool
Resume ();
bool
IsSuspended();
bool
IsStopped();
uint32_t
GetNumFrames ();
lldb::SBFrame
GetFrameAtIndex (uint32_t idx);
lldb::SBFrame
GetSelectedFrame ();
lldb::SBFrame
SetSelectedFrame (uint32_t frame_idx);
lldb::SBProcess
GetProcess ();
bool
GetDescription (lldb::SBStream &description) const;
bool
GetStatus (lldb::SBStream &status) const;
bool
operator == (const lldb::SBThread &rhs) const;
bool
operator != (const lldb::SBThread &rhs) const;
%feature("autodoc","
Given an argument of str to specify the type of thread-origin extended
backtrace to retrieve, query whether the origin of this thread is
available. An SBThread is retured; SBThread.IsValid will return true
if an extended backtrace was available. The returned SBThread is not
a part of the SBProcess' thread list and it cannot be manipulated like
normal threads -- you cannot step or resume it, for instance -- it is
intended to used primarily for generating a backtrace. You may request
the returned thread's own thread origin in turn.
") GetExtendedBacktraceThread;
lldb::SBThread
GetExtendedBacktraceThread (const char *type);
%feature("autodoc","
Takes no arguments, returns a uint32_t.
If this SBThread is an ExtendedBacktrace thread, get the IndexID of the
original thread that this ExtendedBacktrace thread represents, if
available. The thread that was running this backtrace in the past may
not have been registered with lldb's thread index (if it was created,
did its work, and was destroyed without lldb ever stopping execution).
In that case, this ExtendedBacktrace thread's IndexID will be returned.
") GetExtendedBacktraceOriginatingIndexID;
uint32_t
GetExtendedBacktraceOriginatingIndexID();
%feature("autodoc","
Takes no arguments, returns a bool.
lldb may be able to detect that function calls should not be executed
on a given thread at a particular point in time. It is recommended that
this is checked before performing an inferior function call on a given
thread.
") SafeToCallFunctions;
bool
SafeToCallFunctions ();
%pythoncode %{
class frames_access(object):
'''A helper object that will lazily hand out frames for a thread when supplied an index.'''
def __init__(self, sbthread):
self.sbthread = sbthread
def __len__(self):
if self.sbthread:
return int(self.sbthread.GetNumFrames())
return 0
def __getitem__(self, key):
if type(key) is int and key < self.sbthread.GetNumFrames():
return self.sbthread.GetFrameAtIndex(key)
return None
def get_frames_access_object(self):
'''An accessor function that returns a frames_access() object which allows lazy frame access from a lldb.SBThread object.'''
return self.frames_access (self)
def get_thread_frames(self):
'''An accessor function that returns a list() that contains all frames in a lldb.SBThread object.'''
frames = []
for frame in self:
frames.append(frame)
return frames
__swig_getmethods__["id"] = GetThreadID
if _newclass: id = property(GetThreadID, None, doc='''A read only property that returns the thread ID as an integer.''')
__swig_getmethods__["idx"] = GetIndexID
if _newclass: idx = property(GetIndexID, None, doc='''A read only property that returns the thread index ID as an integer. Thread index ID values start at 1 and increment as threads come and go and can be used to uniquely identify threads.''')
__swig_getmethods__["return_value"] = GetStopReturnValue
if _newclass: return_value = property(GetStopReturnValue, None, doc='''A read only property that returns an lldb object that represents the return value from the last stop (lldb.SBValue) if we just stopped due to stepping out of a function.''')
__swig_getmethods__["process"] = GetProcess
if _newclass: process = property(GetProcess, None, doc='''A read only property that returns an lldb object that represents the process (lldb.SBProcess) that owns this thread.''')
__swig_getmethods__["num_frames"] = GetNumFrames
if _newclass: num_frames = property(GetNumFrames, None, doc='''A read only property that returns the number of stack frames in this thread as an integer.''')
__swig_getmethods__["frames"] = get_thread_frames
if _newclass: frames = property(get_thread_frames, None, doc='''A read only property that returns a list() of lldb.SBFrame objects for all frames in this thread.''')
__swig_getmethods__["frame"] = get_frames_access_object
if _newclass: frame = property(get_frames_access_object, None, doc='''A read only property that returns an object that can be used to access frames as an array ("frame_12 = lldb.thread.frame[12]").''')
__swig_getmethods__["name"] = GetName
if _newclass: name = property(GetName, None, doc='''A read only property that returns the name of this thread as a string.''')
__swig_getmethods__["queue"] = GetQueueName
if _newclass: queue = property(GetQueueName, None, doc='''A read only property that returns the dispatch queue name of this thread as a string.''')
__swig_getmethods__["queue_id"] = GetQueueID
if _newclass: queue_id = property(GetQueueID, None, doc='''A read only property that returns the dispatch queue id of this thread as an integer.''')
__swig_getmethods__["stop_reason"] = GetStopReason
if _newclass: stop_reason = property(GetStopReason, None, doc='''A read only property that returns an lldb enumeration value (see enumerations that start with "lldb.eStopReason") that represents the reason this thread stopped.''')
__swig_getmethods__["is_suspended"] = IsSuspended
if _newclass: is_suspended = property(IsSuspended, None, doc='''A read only property that returns a boolean value that indicates if this thread is suspended.''')
__swig_getmethods__["is_stopped"] = IsStopped
if _newclass: is_stopped = property(IsStopped, None, doc='''A read only property that returns a boolean value that indicates if this thread is stopped but not exited.''')
%}
};
} // namespace lldb
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