llvm-project/lldb/source/Target/ExecutionContext.cpp
Greg Clayton 44d937820b Merging the iohandler branch back into main.
The many many benefits include:
1 - Input/Output/Error streams are now handled as real streams not a push style input
2 - auto completion in python embedded interpreter
3 - multi-line input for "script" and "expression" commands now allow you to edit previous/next lines using up and down arrow keys and this makes multi-line input actually a viable thing to use
4 - it is now possible to use curses to drive LLDB (please try the "gui" command)

We will need to deal with and fix any buildbot failures and tests and arise now that input/output and error are correctly hooked up in all cases.

llvm-svn: 200263
2014-01-27 23:43:24 +00:00

836 lines
20 KiB
C++

//===-- ExecutionContext.cpp ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Core/State.h"
#include "lldb/Target/ExecutionContextScope.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
using namespace lldb_private;
ExecutionContext::ExecutionContext() :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
}
ExecutionContext::ExecutionContext (const ExecutionContext &rhs) :
m_target_sp(rhs.m_target_sp),
m_process_sp(rhs.m_process_sp),
m_thread_sp(rhs.m_thread_sp),
m_frame_sp(rhs.m_frame_sp)
{
}
ExecutionContext::ExecutionContext (const lldb::TargetSP &target_sp, bool get_process) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (target_sp)
SetContext (target_sp, get_process);
}
ExecutionContext::ExecutionContext (const lldb::ProcessSP &process_sp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (process_sp)
SetContext (process_sp);
}
ExecutionContext::ExecutionContext (const lldb::ThreadSP &thread_sp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (thread_sp)
SetContext (thread_sp);
}
ExecutionContext::ExecutionContext (const lldb::StackFrameSP &frame_sp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (frame_sp)
SetContext (frame_sp);
}
ExecutionContext::ExecutionContext (const lldb::TargetWP &target_wp, bool get_process) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
lldb::TargetSP target_sp(target_wp.lock());
if (target_sp)
SetContext (target_sp, get_process);
}
ExecutionContext::ExecutionContext (const lldb::ProcessWP &process_wp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
lldb::ProcessSP process_sp(process_wp.lock());
if (process_sp)
SetContext (process_sp);
}
ExecutionContext::ExecutionContext (const lldb::ThreadWP &thread_wp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
lldb::ThreadSP thread_sp(thread_wp.lock());
if (thread_sp)
SetContext (thread_sp);
}
ExecutionContext::ExecutionContext (const lldb::StackFrameWP &frame_wp) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
lldb::StackFrameSP frame_sp(frame_wp.lock());
if (frame_sp)
SetContext (frame_sp);
}
ExecutionContext::ExecutionContext (Target* t, bool fill_current_process_thread_frame) :
m_target_sp (t->shared_from_this()),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (t && fill_current_process_thread_frame)
{
m_process_sp = t->GetProcessSP();
if (m_process_sp)
{
m_thread_sp = m_process_sp->GetThreadList().GetSelectedThread();
if (m_thread_sp)
m_frame_sp = m_thread_sp->GetSelectedFrame();
}
}
}
ExecutionContext::ExecutionContext(Process* process, Thread *thread, StackFrame *frame) :
m_target_sp (),
m_process_sp (process->shared_from_this()),
m_thread_sp (thread->shared_from_this()),
m_frame_sp (frame->shared_from_this())
{
if (process)
m_target_sp = process->GetTarget().shared_from_this();
}
ExecutionContext::ExecutionContext (const ExecutionContextRef &exe_ctx_ref) :
m_target_sp (exe_ctx_ref.GetTargetSP()),
m_process_sp (exe_ctx_ref.GetProcessSP()),
m_thread_sp (exe_ctx_ref.GetThreadSP()),
m_frame_sp (exe_ctx_ref.GetFrameSP())
{
}
ExecutionContext::ExecutionContext (const ExecutionContextRef *exe_ctx_ref_ptr, bool thread_and_frame_only_if_stopped) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (exe_ctx_ref_ptr)
{
m_target_sp = exe_ctx_ref_ptr->GetTargetSP();
m_process_sp = exe_ctx_ref_ptr->GetProcessSP();
if (!thread_and_frame_only_if_stopped || (m_process_sp && StateIsStoppedState(m_process_sp->GetState(), true)))
{
m_thread_sp = exe_ctx_ref_ptr->GetThreadSP();
m_frame_sp = exe_ctx_ref_ptr->GetFrameSP();
}
}
}
ExecutionContext::ExecutionContext (const ExecutionContextRef *exe_ctx_ref_ptr, Mutex::Locker &locker) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (exe_ctx_ref_ptr)
{
m_target_sp = exe_ctx_ref_ptr->GetTargetSP();
if (m_target_sp)
{
locker.Lock(m_target_sp->GetAPIMutex());
m_process_sp = exe_ctx_ref_ptr->GetProcessSP();
m_thread_sp = exe_ctx_ref_ptr->GetThreadSP();
m_frame_sp = exe_ctx_ref_ptr->GetFrameSP();
}
}
}
ExecutionContext::ExecutionContext (const ExecutionContextRef &exe_ctx_ref, Mutex::Locker &locker) :
m_target_sp (exe_ctx_ref.GetTargetSP()),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (m_target_sp)
{
locker.Lock(m_target_sp->GetAPIMutex());
m_process_sp = exe_ctx_ref.GetProcessSP();
m_thread_sp = exe_ctx_ref.GetThreadSP();
m_frame_sp = exe_ctx_ref.GetFrameSP();
}
}
ExecutionContext::ExecutionContext (ExecutionContextScope *exe_scope_ptr) :
m_target_sp (),
m_process_sp (),
m_thread_sp (),
m_frame_sp ()
{
if (exe_scope_ptr)
exe_scope_ptr->CalculateExecutionContext (*this);
}
ExecutionContext::ExecutionContext (ExecutionContextScope &exe_scope_ref)
{
exe_scope_ref.CalculateExecutionContext (*this);
}
void
ExecutionContext::Clear()
{
m_target_sp.reset();
m_process_sp.reset();
m_thread_sp.reset();
m_frame_sp.reset();
}
ExecutionContext::~ExecutionContext()
{
}
uint32_t
ExecutionContext::GetAddressByteSize() const
{
if (m_target_sp && m_target_sp->GetArchitecture().IsValid())
m_target_sp->GetArchitecture().GetAddressByteSize();
if (m_process_sp)
m_process_sp->GetAddressByteSize();
return sizeof(void *);
}
lldb::ByteOrder
ExecutionContext::GetByteOrder() const
{
if (m_target_sp && m_target_sp->GetArchitecture().IsValid())
m_target_sp->GetArchitecture().GetByteOrder();
if (m_process_sp)
m_process_sp->GetByteOrder();
return lldb::endian::InlHostByteOrder();
}
RegisterContext *
ExecutionContext::GetRegisterContext () const
{
if (m_frame_sp)
return m_frame_sp->GetRegisterContext().get();
else if (m_thread_sp)
return m_thread_sp->GetRegisterContext().get();
return NULL;
}
Target *
ExecutionContext::GetTargetPtr () const
{
if (m_target_sp)
return m_target_sp.get();
if (m_process_sp)
return &m_process_sp->GetTarget();
return NULL;
}
Process *
ExecutionContext::GetProcessPtr () const
{
if (m_process_sp)
return m_process_sp.get();
if (m_target_sp)
return m_target_sp->GetProcessSP().get();
return NULL;
}
ExecutionContextScope *
ExecutionContext::GetBestExecutionContextScope () const
{
if (m_frame_sp)
return m_frame_sp.get();
if (m_thread_sp)
return m_thread_sp.get();
if (m_process_sp)
return m_process_sp.get();
return m_target_sp.get();
}
Target &
ExecutionContext::GetTargetRef () const
{
#if defined (LLDB_CONFIGURATION_DEBUG) || defined (LLDB_CONFIGURATION_RELEASE)
assert (m_target_sp.get());
#endif
return *m_target_sp;
}
Process &
ExecutionContext::GetProcessRef () const
{
#if defined (LLDB_CONFIGURATION_DEBUG) || defined (LLDB_CONFIGURATION_RELEASE)
assert (m_process_sp.get());
#endif
return *m_process_sp;
}
Thread &
ExecutionContext::GetThreadRef () const
{
#if defined (LLDB_CONFIGURATION_DEBUG) || defined (LLDB_CONFIGURATION_RELEASE)
assert (m_thread_sp.get());
#endif
return *m_thread_sp;
}
StackFrame &
ExecutionContext::GetFrameRef () const
{
#if defined (LLDB_CONFIGURATION_DEBUG) || defined (LLDB_CONFIGURATION_RELEASE)
assert (m_frame_sp.get());
#endif
return *m_frame_sp;
}
void
ExecutionContext::SetTargetSP (const lldb::TargetSP &target_sp)
{
m_target_sp = target_sp;
}
void
ExecutionContext::SetProcessSP (const lldb::ProcessSP &process_sp)
{
m_process_sp = process_sp;
}
void
ExecutionContext::SetThreadSP (const lldb::ThreadSP &thread_sp)
{
m_thread_sp = thread_sp;
}
void
ExecutionContext::SetFrameSP (const lldb::StackFrameSP &frame_sp)
{
m_frame_sp = frame_sp;
}
void
ExecutionContext::SetTargetPtr (Target* target)
{
if (target)
m_target_sp = target->shared_from_this();
else
m_target_sp.reset();
}
void
ExecutionContext::SetProcessPtr (Process *process)
{
if (process)
m_process_sp = process->shared_from_this();
else
m_process_sp.reset();
}
void
ExecutionContext::SetThreadPtr (Thread *thread)
{
if (thread)
m_thread_sp = thread->shared_from_this();
else
m_thread_sp.reset();
}
void
ExecutionContext::SetFramePtr (StackFrame *frame)
{
if (frame)
m_frame_sp = frame->shared_from_this();
else
m_frame_sp.reset();
}
void
ExecutionContext::SetContext (const lldb::TargetSP &target_sp, bool get_process)
{
m_target_sp = target_sp;
if (get_process && target_sp)
m_process_sp = target_sp->GetProcessSP();
else
m_process_sp.reset();
m_thread_sp.reset();
m_frame_sp.reset();
}
void
ExecutionContext::SetContext (const lldb::ProcessSP &process_sp)
{
m_process_sp = process_sp;
if (process_sp)
m_target_sp = process_sp->GetTarget().shared_from_this();
else
m_target_sp.reset();
m_thread_sp.reset();
m_frame_sp.reset();
}
void
ExecutionContext::SetContext (const lldb::ThreadSP &thread_sp)
{
m_frame_sp.reset();
m_thread_sp = thread_sp;
if (thread_sp)
{
m_process_sp = thread_sp->GetProcess();
if (m_process_sp)
m_target_sp = m_process_sp->GetTarget().shared_from_this();
else
m_target_sp.reset();
}
else
{
m_target_sp.reset();
m_process_sp.reset();
}
}
void
ExecutionContext::SetContext (const lldb::StackFrameSP &frame_sp)
{
m_frame_sp = frame_sp;
if (frame_sp)
{
m_thread_sp = frame_sp->CalculateThread();
if (m_thread_sp)
{
m_process_sp = m_thread_sp->GetProcess();
if (m_process_sp)
m_target_sp = m_process_sp->GetTarget().shared_from_this();
else
m_target_sp.reset();
}
else
{
m_target_sp.reset();
m_process_sp.reset();
}
}
else
{
m_target_sp.reset();
m_process_sp.reset();
m_thread_sp.reset();
}
}
ExecutionContext &
ExecutionContext::operator =(const ExecutionContext &rhs)
{
if (this != &rhs)
{
m_target_sp = rhs.m_target_sp;
m_process_sp = rhs.m_process_sp;
m_thread_sp = rhs.m_thread_sp;
m_frame_sp = rhs.m_frame_sp;
}
return *this;
}
bool
ExecutionContext::operator ==(const ExecutionContext &rhs) const
{
// Check that the frame shared pointers match, or both are valid and their stack
// IDs match since sometimes we get new objects that represent the same
// frame within a thread.
if ((m_frame_sp == rhs.m_frame_sp) || (m_frame_sp && rhs.m_frame_sp && m_frame_sp->GetStackID() == rhs.m_frame_sp->GetStackID()))
{
// Check that the thread shared pointers match, or both are valid and
// their thread IDs match since sometimes we get new objects that
// represent the same thread within a process.
if ((m_thread_sp == rhs.m_thread_sp) || (m_thread_sp && rhs.m_thread_sp && m_thread_sp->GetID() == rhs.m_thread_sp->GetID()))
{
// Processes and targets don't change much
return m_process_sp == rhs.m_process_sp && m_target_sp == rhs.m_target_sp;
}
}
return false;
}
bool
ExecutionContext::operator !=(const ExecutionContext &rhs) const
{
return !(*this == rhs);
}
bool
ExecutionContext::HasTargetScope () const
{
return ((bool) m_target_sp
&& m_target_sp->IsValid());
}
bool
ExecutionContext::HasProcessScope () const
{
return (HasTargetScope()
&& ((bool) m_process_sp && m_process_sp->IsValid()));
}
bool
ExecutionContext::HasThreadScope () const
{
return (HasProcessScope()
&& ((bool) m_thread_sp && m_thread_sp->IsValid()));
}
bool
ExecutionContext::HasFrameScope () const
{
return HasThreadScope() && m_frame_sp;
}
ExecutionContextRef::ExecutionContextRef() :
m_target_wp (),
m_process_wp (),
m_thread_wp (),
m_tid(LLDB_INVALID_THREAD_ID),
m_stack_id ()
{
}
ExecutionContextRef::ExecutionContextRef (const ExecutionContext *exe_ctx) :
m_target_wp (),
m_process_wp (),
m_thread_wp (),
m_tid(LLDB_INVALID_THREAD_ID),
m_stack_id ()
{
if (exe_ctx)
*this = *exe_ctx;
}
ExecutionContextRef::ExecutionContextRef (const ExecutionContext &exe_ctx) :
m_target_wp (),
m_process_wp (),
m_thread_wp (),
m_tid(LLDB_INVALID_THREAD_ID),
m_stack_id ()
{
*this = exe_ctx;
}
ExecutionContextRef::ExecutionContextRef (Target *target, bool adopt_selected) :
m_target_wp(),
m_process_wp(),
m_thread_wp(),
m_tid(LLDB_INVALID_THREAD_ID),
m_stack_id ()
{
SetTargetPtr (target, adopt_selected);
}
ExecutionContextRef::ExecutionContextRef (const ExecutionContextRef &rhs) :
m_target_wp (rhs.m_target_wp),
m_process_wp(rhs.m_process_wp),
m_thread_wp (rhs.m_thread_wp),
m_tid (rhs.m_tid),
m_stack_id (rhs.m_stack_id)
{
}
ExecutionContextRef &
ExecutionContextRef::operator =(const ExecutionContextRef &rhs)
{
if (this != &rhs)
{
m_target_wp = rhs.m_target_wp;
m_process_wp = rhs.m_process_wp;
m_thread_wp = rhs.m_thread_wp;
m_tid = rhs.m_tid;
m_stack_id = rhs.m_stack_id;
}
return *this;
}
ExecutionContextRef &
ExecutionContextRef::operator =(const ExecutionContext &exe_ctx)
{
m_target_wp = exe_ctx.GetTargetSP();
m_process_wp = exe_ctx.GetProcessSP();
lldb::ThreadSP thread_sp (exe_ctx.GetThreadSP());
m_thread_wp = thread_sp;
if (thread_sp)
m_tid = thread_sp->GetID();
else
m_tid = LLDB_INVALID_THREAD_ID;
lldb::StackFrameSP frame_sp (exe_ctx.GetFrameSP());
if (frame_sp)
m_stack_id = frame_sp->GetStackID();
else
m_stack_id.Clear();
return *this;
}
void
ExecutionContextRef::Clear()
{
m_target_wp.reset();
m_process_wp.reset();
ClearThread();
ClearFrame();
}
ExecutionContextRef::~ExecutionContextRef()
{
}
void
ExecutionContextRef::SetTargetSP (const lldb::TargetSP &target_sp)
{
m_target_wp = target_sp;
}
void
ExecutionContextRef::SetProcessSP (const lldb::ProcessSP &process_sp)
{
if (process_sp)
{
m_process_wp = process_sp;
SetTargetSP (process_sp->GetTarget().shared_from_this());
}
else
{
m_process_wp.reset();
m_target_wp.reset();
}
}
void
ExecutionContextRef::SetThreadSP (const lldb::ThreadSP &thread_sp)
{
if (thread_sp)
{
m_thread_wp = thread_sp;
m_tid = thread_sp->GetID();
SetProcessSP (thread_sp->GetProcess());
}
else
{
ClearThread();
m_process_wp.reset();
m_target_wp.reset();
}
}
void
ExecutionContextRef::SetFrameSP (const lldb::StackFrameSP &frame_sp)
{
if (frame_sp)
{
m_stack_id = frame_sp->GetStackID();
SetThreadSP (frame_sp->GetThread());
}
else
{
ClearFrame();
ClearThread();
m_process_wp.reset();
m_target_wp.reset();
}
}
void
ExecutionContextRef::SetTargetPtr (Target* target, bool adopt_selected)
{
Clear();
if (target)
{
lldb::TargetSP target_sp (target->shared_from_this());
if (target_sp)
{
m_target_wp = target_sp;
if (adopt_selected)
{
lldb::ProcessSP process_sp (target_sp->GetProcessSP());
if (process_sp)
{
m_process_wp = process_sp;
if (process_sp)
{
// Only fill in the thread and frame if our process is stopped
if (StateIsStoppedState (process_sp->GetState(), true))
{
lldb::ThreadSP thread_sp (process_sp->GetThreadList().GetSelectedThread());
if (!thread_sp)
thread_sp = process_sp->GetThreadList().GetThreadAtIndex(0);
if (thread_sp)
{
SetThreadSP (thread_sp);
lldb::StackFrameSP frame_sp (thread_sp->GetSelectedFrame());
if (!frame_sp)
frame_sp = thread_sp->GetStackFrameAtIndex(0);
if (frame_sp)
SetFrameSP (frame_sp);
}
}
}
}
}
}
}
}
void
ExecutionContextRef::SetProcessPtr (Process *process)
{
if (process)
{
SetProcessSP(process->shared_from_this());
}
else
{
m_process_wp.reset();
m_target_wp.reset();
}
}
void
ExecutionContextRef::SetThreadPtr (Thread *thread)
{
if (thread)
{
SetThreadSP (thread->shared_from_this());
}
else
{
ClearThread();
m_process_wp.reset();
m_target_wp.reset();
}
}
void
ExecutionContextRef::SetFramePtr (StackFrame *frame)
{
if (frame)
SetFrameSP (frame->shared_from_this());
else
Clear();
}
lldb::TargetSP
ExecutionContextRef::GetTargetSP () const
{
lldb::TargetSP target_sp(m_target_wp.lock());
if (target_sp && !target_sp->IsValid())
target_sp.reset();
return target_sp;
}
lldb::ProcessSP
ExecutionContextRef::GetProcessSP () const
{
lldb::ProcessSP process_sp(m_process_wp.lock());
if (process_sp && !process_sp->IsValid())
process_sp.reset();
return process_sp;
}
lldb::ThreadSP
ExecutionContextRef::GetThreadSP () const
{
lldb::ThreadSP thread_sp (m_thread_wp.lock());
if (m_tid != LLDB_INVALID_THREAD_ID)
{
// We check if the thread has been destroyed in cases where clients
// might still have shared pointer to a thread, but the thread is
// not valid anymore (not part of the process)
if (!thread_sp || !thread_sp->IsValid())
{
lldb::ProcessSP process_sp(GetProcessSP());
if (process_sp && process_sp->IsValid())
{
thread_sp = process_sp->GetThreadList().FindThreadByID(m_tid);
m_thread_wp = thread_sp;
}
}
}
// Check that we aren't about to return an invalid thread sp. We might return a NULL thread_sp,
// but don't return an invalid one.
if (thread_sp && !thread_sp->IsValid())
thread_sp.reset();
return thread_sp;
}
lldb::StackFrameSP
ExecutionContextRef::GetFrameSP () const
{
if (m_stack_id.IsValid())
{
lldb::ThreadSP thread_sp (GetThreadSP());
if (thread_sp)
return thread_sp->GetFrameWithStackID (m_stack_id);
}
return lldb::StackFrameSP();
}
ExecutionContext
ExecutionContextRef::Lock (bool thread_and_frame_only_if_stopped) const
{
return ExecutionContext(this, thread_and_frame_only_if_stopped);
}