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3df9a8dfd7714dd6d03d5e1a93dbbfee736946bc
llvm-project/lldb/source/Target/Process.cpp
Caroline Tice 3df9a8dfd7 This is a very large commit that completely re-does the way lldb 
handles user settable internal variables (the equivalent of set/show
variables in gdb).  In addition to the basic infrastructure (most of
which is defined in UserSettingsController.{h,cpp}, there are examples
of two classes that have been set up to contain user settable
variables (the Debugger and Process classes).  The 'settings' command
has been modified to be a command-subcommand structure, and the 'set',
'show' and 'append' commands have been moved into this sub-commabnd
structure.  The old StateVariable class has been completely replaced
by this, and the state variable dictionary has been removed from the
Command Interpreter.  Places that formerly accessed the state variable
mechanism have been modified to access the variables in this new
structure instead (checking the term-width; getting/checking the
prompt; etc.)

Variables are attached to classes; there are two basic "flavors" of
variables that can be set: "global" variables (static/class-wide), and
"instance" variables (one per instance of the class).  The whole thing
has been set up so that any global or instance variable can be set at
any time (e.g. on start up, in your .lldbinit file), whether or not
any instances actually exist (there's a whole pending and default
values mechanism to help deal with that).

llvm-svn: 113041
2010-09-04 00:03:46 +00:00

2266 lines
71 KiB
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//===-- Process.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/Process.h"
#include "lldb/lldb-private-log.h"
#include "lldb/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Event.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/State.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Host/Host.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/TargetList.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlan.h"
using namespace lldb;
using namespace lldb_private;
Process*
Process::FindPlugin (Target &target, const char *plugin_name, Listener &listener)
{
ProcessCreateInstance create_callback = NULL;
if (plugin_name)
{
create_callback = PluginManager::GetProcessCreateCallbackForPluginName (plugin_name);
if (create_callback)
{
std::auto_ptr<Process> debugger_ap(create_callback(target, listener));
if (debugger_ap->CanDebug(target))
return debugger_ap.release();
}
}
else
{
for (uint32_t idx = 0; (create_callback = PluginManager::GetProcessCreateCallbackAtIndex(idx)) != NULL; ++idx)
{
std::auto_ptr<Process> debugger_ap(create_callback(target, listener));
if (debugger_ap->CanDebug(target))
return debugger_ap.release();
}
}
return NULL;
}
//----------------------------------------------------------------------
// Process constructor
//----------------------------------------------------------------------
Process::Process(Target &target, Listener &listener) :
UserID (LLDB_INVALID_PROCESS_ID),
Broadcaster ("Process"),
ProcessInstanceSettings (*(Process::GetSettingsController().get())),
m_target (target),
m_section_load_info (),
m_public_state (eStateUnloaded),
m_private_state (eStateUnloaded),
m_private_state_broadcaster ("lldb.process.internal_state_broadcaster"),
m_private_state_control_broadcaster ("lldb.process.internal_state_control_broadcaster"),
m_private_state_listener ("lldb.process.internal_state_listener"),
m_private_state_control_wait(),
m_private_state_thread (LLDB_INVALID_HOST_THREAD),
m_stop_id (0),
m_thread_index_id (0),
m_exit_status (-1),
m_exit_string (),
m_thread_list (this),
m_notifications (),
m_listener(listener),
m_unix_signals (),
m_objc_object_printer(*this),
m_persistent_vars()
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT);
if (log)
log->Printf ("%p Process::Process()", this);
listener.StartListeningForEvents (this,
eBroadcastBitStateChanged |
eBroadcastBitInterrupt |
eBroadcastBitSTDOUT |
eBroadcastBitSTDERR);
m_private_state_listener.StartListeningForEvents(&m_private_state_broadcaster,
eBroadcastBitStateChanged);
m_private_state_listener.StartListeningForEvents(&m_private_state_control_broadcaster,
eBroadcastInternalStateControlStop |
eBroadcastInternalStateControlPause |
eBroadcastInternalStateControlResume);
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
Process::~Process()
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT);
if (log)
log->Printf ("%p Process::~Process()", this);
StopPrivateStateThread();
}
void
Process::Finalize()
{
// Do any cleanup needed prior to being destructed... Subclasses
// that override this method should call this superclass method as well.
}
void
Process::RegisterNotificationCallbacks (const Notifications& callbacks)
{
m_notifications.push_back(callbacks);
if (callbacks.initialize != NULL)
callbacks.initialize (callbacks.baton, this);
}
bool
Process::UnregisterNotificationCallbacks(const Notifications& callbacks)
{
std::vector<Notifications>::iterator pos, end = m_notifications.end();
for (pos = m_notifications.begin(); pos != end; ++pos)
{
if (pos->baton == callbacks.baton &&
pos->initialize == callbacks.initialize &&
pos->process_state_changed == callbacks.process_state_changed)
{
m_notifications.erase(pos);
return true;
}
}
return false;
}
void
Process::SynchronouslyNotifyStateChanged (StateType state)
{
std::vector<Notifications>::iterator notification_pos, notification_end = m_notifications.end();
for (notification_pos = m_notifications.begin(); notification_pos != notification_end; ++notification_pos)
{
if (notification_pos->process_state_changed)
notification_pos->process_state_changed (notification_pos->baton, this, state);
}
}
// FIXME: We need to do some work on events before the general Listener sees them.
// For instance if we are continuing from a breakpoint, we need to ensure that we do
// the little "insert real insn, step & stop" trick. But we can't do that when the
// event is delivered by the broadcaster - since that is done on the thread that is
// waiting for new events, so if we needed more than one event for our handling, we would
// stall. So instead we do it when we fetch the event off of the queue.
//
StateType
Process::GetNextEvent (EventSP &event_sp)
{
StateType state = eStateInvalid;
if (m_listener.GetNextEventForBroadcaster (this, event_sp) && event_sp)
state = Process::ProcessEventData::GetStateFromEvent (event_sp.get());
return state;
}
StateType
Process::WaitForProcessToStop (const TimeValue *timeout)
{
StateType match_states[] = { eStateStopped, eStateCrashed, eStateDetached, eStateExited, eStateUnloaded };
return WaitForState (timeout, match_states, sizeof(match_states) / sizeof(StateType));
}
StateType
Process::WaitForState
(
const TimeValue *timeout,
const StateType *match_states, const uint32_t num_match_states
)
{
EventSP event_sp;
uint32_t i;
StateType state = eStateUnloaded;
while (state != eStateInvalid)
{
state = WaitForStateChangedEvents (timeout, event_sp);
for (i=0; i<num_match_states; ++i)
{
if (match_states[i] == state)
return state;
}
}
return state;
}
StateType
Process::WaitForStateChangedEvents (const TimeValue *timeout, EventSP &event_sp)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout);
StateType state = eStateInvalid;
if (m_listener.WaitForEventForBroadcasterWithType(timeout,
this,
eBroadcastBitStateChanged,
event_sp))
state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (log)
log->Printf ("Process::%s (timeout = %p, event_sp) => %s",
__FUNCTION__,
timeout,
StateAsCString(state));
return state;
}
Event *
Process::PeekAtStateChangedEvents ()
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s...", __FUNCTION__);
Event *event_ptr;
event_ptr = m_listener.PeekAtNextEventForBroadcasterWithType(this,
eBroadcastBitStateChanged);
if (log)
{
if (event_ptr)
{
log->Printf ("Process::%s (event_ptr) => %s",
__FUNCTION__,
StateAsCString(ProcessEventData::GetStateFromEvent (event_ptr)));
}
else
{
log->Printf ("Process::%s no events found",
__FUNCTION__);
}
}
return event_ptr;
}
StateType
Process::WaitForStateChangedEventsPrivate (const TimeValue *timeout, EventSP &event_sp)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout);
StateType state = eStateInvalid;
if (m_private_state_listener.WaitForEventForBroadcasterWithType(timeout,
&m_private_state_broadcaster,
eBroadcastBitStateChanged,
event_sp))
state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
// This is a bit of a hack, but when we wait here we could very well return
// to the command-line, and that could disable the log, which would render the
// log we got above invalid.
log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s (timeout = %p, event_sp) => %s", __FUNCTION__, timeout, StateAsCString(state));
return state;
}
bool
Process::WaitForEventsPrivate (const TimeValue *timeout, EventSP &event_sp, bool control_only)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s (timeout = %p, event_sp)...", __FUNCTION__, timeout);
if (control_only)
return m_private_state_listener.WaitForEventForBroadcaster(timeout, &m_private_state_control_broadcaster, event_sp);
else
return m_private_state_listener.WaitForEvent(timeout, event_sp);
}
bool
Process::IsRunning () const
{
return StateIsRunningState (m_public_state.GetValue());
}
int
Process::GetExitStatus ()
{
if (m_public_state.GetValue() == eStateExited)
return m_exit_status;
return -1;
}
const char *
Process::GetExitDescription ()
{
if (m_public_state.GetValue() == eStateExited && !m_exit_string.empty())
return m_exit_string.c_str();
return NULL;
}
void
Process::SetExitStatus (int status, const char *cstr)
{
m_exit_status = status;
if (cstr)
m_exit_string = cstr;
else
m_exit_string.clear();
SetPrivateState (eStateExited);
}
// This static callback can be used to watch for local child processes on
// the current host. The the child process exits, the process will be
// found in the global target list (we want to be completely sure that the
// lldb_private::Process doesn't go away before we can deliver the signal.
bool
Process::SetProcessExitStatus
(
void *callback_baton,
lldb::pid_t pid,
int signo, // Zero for no signal
int exit_status // Exit value of process if signal is zero
)
{
if (signo == 0 || exit_status)
{
TargetSP target_sp(Debugger::FindTargetWithProcessID (pid));
if (target_sp)
{
ProcessSP process_sp (target_sp->GetProcessSP());
if (process_sp)
{
const char *signal_cstr = NULL;
if (signo)
signal_cstr = process_sp->GetUnixSignals().GetSignalAsCString (signo);
process_sp->SetExitStatus (exit_status, signal_cstr);
}
}
return true;
}
return false;
}
uint32_t
Process::GetNextThreadIndexID ()
{
return ++m_thread_index_id;
}
StateType
Process::GetState()
{
// If any other threads access this we will need a mutex for it
return m_public_state.GetValue ();
}
void
Process::SetPublicState (StateType new_state)
{
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE);
if (log)
log->Printf("Process::SetPublicState (%s)", StateAsCString(new_state));
m_public_state.SetValue (new_state);
}
StateType
Process::GetPrivateState ()
{
return m_private_state.GetValue();
}
void
Process::SetPrivateState (StateType new_state)
{
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_STATE);
bool state_changed = false;
if (log)
log->Printf("Process::SetPrivateState (%s)", StateAsCString(new_state));
Mutex::Locker locker(m_private_state.GetMutex());
const StateType old_state = m_private_state.GetValueNoLock ();
state_changed = old_state != new_state;
if (state_changed)
{
m_private_state.SetValueNoLock (new_state);
if (StateIsStoppedState(new_state))
{
m_stop_id++;
if (log)
log->Printf("Process::SetPrivateState (%s) stop_id = %u", StateAsCString(new_state), m_stop_id);
}
// Use our target to get a shared pointer to ourselves...
m_private_state_broadcaster.BroadcastEvent (eBroadcastBitStateChanged, new ProcessEventData (GetTarget().GetProcessSP(), new_state));
}
else
{
if (log)
log->Printf("Process::SetPrivateState (%s) state didn't change. Ignoring...", StateAsCString(new_state), StateAsCString(old_state));
}
}
uint32_t
Process::GetStopID() const
{
return m_stop_id;
}
addr_t
Process::GetImageInfoAddress()
{
return LLDB_INVALID_ADDRESS;
}
DynamicLoader *
Process::GetDynamicLoader()
{
return NULL;
}
const ABI *
Process::GetABI()
{
ConstString& triple = m_target_triple;
if (triple.IsEmpty())
return NULL;
if (m_abi_sp.get() == NULL)
{
m_abi_sp.reset(ABI::FindPlugin(triple));
}
return m_abi_sp.get();
}
BreakpointSiteList &
Process::GetBreakpointSiteList()
{
return m_breakpoint_site_list;
}
const BreakpointSiteList &
Process::GetBreakpointSiteList() const
{
return m_breakpoint_site_list;
}
void
Process::DisableAllBreakpointSites ()
{
m_breakpoint_site_list.SetEnabledForAll (false);
}
Error
Process::ClearBreakpointSiteByID (lldb::user_id_t break_id)
{
Error error (DisableBreakpointSiteByID (break_id));
if (error.Success())
m_breakpoint_site_list.Remove(break_id);
return error;
}
Error
Process::DisableBreakpointSiteByID (lldb::user_id_t break_id)
{
Error error;
BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id);
if (bp_site_sp)
{
if (bp_site_sp->IsEnabled())
error = DisableBreakpoint (bp_site_sp.get());
}
else
{
error.SetErrorStringWithFormat("invalid breakpoint site ID: %i", break_id);
}
return error;
}
Error
Process::EnableBreakpointSiteByID (lldb::user_id_t break_id)
{
Error error;
BreakpointSiteSP bp_site_sp = m_breakpoint_site_list.FindByID (break_id);
if (bp_site_sp)
{
if (!bp_site_sp->IsEnabled())
error = EnableBreakpoint (bp_site_sp.get());
}
else
{
error.SetErrorStringWithFormat("invalid breakpoint site ID: %i", break_id);
}
return error;
}
lldb::break_id_t
Process::CreateBreakpointSite (BreakpointLocationSP &owner, bool use_hardware)
{
const addr_t load_addr = owner->GetAddress().GetLoadAddress (this);
if (load_addr != LLDB_INVALID_ADDRESS)
{
BreakpointSiteSP bp_site_sp;
// Look up this breakpoint site. If it exists, then add this new owner, otherwise
// create a new breakpoint site and add it.
bp_site_sp = m_breakpoint_site_list.FindByAddress (load_addr);
if (bp_site_sp)
{
bp_site_sp->AddOwner (owner);
owner->SetBreakpointSite (bp_site_sp);
return bp_site_sp->GetID();
}
else
{
bp_site_sp.reset (new BreakpointSite (&m_breakpoint_site_list, owner, load_addr, LLDB_INVALID_THREAD_ID, use_hardware));
if (bp_site_sp)
{
if (EnableBreakpoint (bp_site_sp.get()).Success())
{
owner->SetBreakpointSite (bp_site_sp);
return m_breakpoint_site_list.Add (bp_site_sp);
}
}
}
}
// We failed to enable the breakpoint
return LLDB_INVALID_BREAK_ID;
}
void
Process::RemoveOwnerFromBreakpointSite (lldb::user_id_t owner_id, lldb::user_id_t owner_loc_id, BreakpointSiteSP &bp_site_sp)
{
uint32_t num_owners = bp_site_sp->RemoveOwner (owner_id, owner_loc_id);
if (num_owners == 0)
{
DisableBreakpoint(bp_site_sp.get());
m_breakpoint_site_list.RemoveByAddress(bp_site_sp->GetLoadAddress());
}
}
size_t
Process::RemoveBreakpointOpcodesFromBuffer (addr_t bp_addr, size_t size, uint8_t *buf) const
{
size_t bytes_removed = 0;
addr_t intersect_addr;
size_t intersect_size;
size_t opcode_offset;
size_t idx;
BreakpointSiteSP bp;
for (idx = 0; (bp = m_breakpoint_site_list.GetByIndex(idx)) != NULL; ++idx)
{
if (bp->GetType() == BreakpointSite::eSoftware)
{
if (bp->IntersectsRange(bp_addr, size, &intersect_addr, &intersect_size, &opcode_offset))
{
assert(bp_addr <= intersect_addr && intersect_addr < bp_addr + size);
assert(bp_addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= bp_addr + size);
assert(opcode_offset + intersect_size <= bp->GetByteSize());
size_t buf_offset = intersect_addr - bp_addr;
::memcpy(buf + buf_offset, bp->GetSavedOpcodeBytes() + opcode_offset, intersect_size);
}
}
}
return bytes_removed;
}
Error
Process::EnableSoftwareBreakpoint (BreakpointSite *bp_site)
{
Error error;
assert (bp_site != NULL);
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS);
const addr_t bp_addr = bp_site->GetLoadAddress();
if (log)
log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%llx", bp_site->GetID(), (uint64_t)bp_addr);
if (bp_site->IsEnabled())
{
if (log)
log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- already enabled", bp_site->GetID(), (uint64_t)bp_addr);
return error;
}
if (bp_addr == LLDB_INVALID_ADDRESS)
{
error.SetErrorString("BreakpointSite contains an invalid load address.");
return error;
}
// Ask the lldb::Process subclass to fill in the correct software breakpoint
// trap for the breakpoint site
const size_t bp_opcode_size = GetSoftwareBreakpointTrapOpcode(bp_site);
if (bp_opcode_size == 0)
{
error.SetErrorStringWithFormat ("Process::GetSoftwareBreakpointTrapOpcode() returned zero, unable to get breakpoint trap for address 0x%llx.\n", bp_addr);
}
else
{
const uint8_t * const bp_opcode_bytes = bp_site->GetTrapOpcodeBytes();
if (bp_opcode_bytes == NULL)
{
error.SetErrorString ("BreakpointSite doesn't contain a valid breakpoint trap opcode.");
return error;
}
// Save the original opcode by reading it
if (DoReadMemory(bp_addr, bp_site->GetSavedOpcodeBytes(), bp_opcode_size, error) == bp_opcode_size)
{
// Write a software breakpoint in place of the original opcode
if (DoWriteMemory(bp_addr, bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size)
{
uint8_t verify_bp_opcode_bytes[64];
if (DoReadMemory(bp_addr, verify_bp_opcode_bytes, bp_opcode_size, error) == bp_opcode_size)
{
if (::memcmp(bp_opcode_bytes, verify_bp_opcode_bytes, bp_opcode_size) == 0)
{
bp_site->SetEnabled(true);
bp_site->SetType (BreakpointSite::eSoftware);
if (log)
log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- SUCCESS",
bp_site->GetID(),
(uint64_t)bp_addr);
}
else
error.SetErrorString("Failed to verify the breakpoint trap in memory.");
}
else
error.SetErrorString("Unable to read memory to verify breakpoint trap.");
}
else
error.SetErrorString("Unable to write breakpoint trap to memory.");
}
else
error.SetErrorString("Unable to read memory at breakpoint address.");
}
if (log)
log->Printf ("Process::EnableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- FAILED: %s",
bp_site->GetID(),
(uint64_t)bp_addr,
error.AsCString());
return error;
}
Error
Process::DisableSoftwareBreakpoint (BreakpointSite *bp_site)
{
Error error;
assert (bp_site != NULL);
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_BREAKPOINTS);
addr_t bp_addr = bp_site->GetLoadAddress();
lldb::user_id_t breakID = bp_site->GetID();
if (log)
log->Printf ("ProcessMacOSX::DisableBreakpoint (breakID = %d) addr = 0x%llx", breakID, (uint64_t)bp_addr);
if (bp_site->IsHardware())
{
error.SetErrorString("Breakpoint site is a hardware breakpoint.");
}
else if (bp_site->IsEnabled())
{
const size_t break_op_size = bp_site->GetByteSize();
const uint8_t * const break_op = bp_site->GetTrapOpcodeBytes();
if (break_op_size > 0)
{
// Clear a software breakoint instruction
uint8_t curr_break_op[8];
assert (break_op_size <= sizeof(curr_break_op));
bool break_op_found = false;
// Read the breakpoint opcode
if (DoReadMemory (bp_addr, curr_break_op, break_op_size, error) == break_op_size)
{
bool verify = false;
// Make sure we have the a breakpoint opcode exists at this address
if (::memcmp (curr_break_op, break_op, break_op_size) == 0)
{
break_op_found = true;
// We found a valid breakpoint opcode at this address, now restore
// the saved opcode.
if (DoWriteMemory (bp_addr, bp_site->GetSavedOpcodeBytes(), break_op_size, error) == break_op_size)
{
verify = true;
}
else
error.SetErrorString("Memory write failed when restoring original opcode.");
}
else
{
error.SetErrorString("Original breakpoint trap is no longer in memory.");
// Set verify to true and so we can check if the original opcode has already been restored
verify = true;
}
if (verify)
{
uint8_t verify_opcode[8];
assert (break_op_size < sizeof(verify_opcode));
// Verify that our original opcode made it back to the inferior
if (DoReadMemory (bp_addr, verify_opcode, break_op_size, error) == break_op_size)
{
// compare the memory we just read with the original opcode
if (::memcmp (bp_site->GetSavedOpcodeBytes(), verify_opcode, break_op_size) == 0)
{
// SUCCESS
bp_site->SetEnabled(false);
if (log)
log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- SUCCESS", bp_site->GetID(), (uint64_t)bp_addr);
return error;
}
else
{
if (break_op_found)
error.SetErrorString("Failed to restore original opcode.");
}
}
else
error.SetErrorString("Failed to read memory to verify that breakpoint trap was restored.");
}
}
else
error.SetErrorString("Unable to read memory that should contain the breakpoint trap.");
}
}
else
{
if (log)
log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- already disabled", bp_site->GetID(), (uint64_t)bp_addr);
return error;
}
if (log)
log->Printf ("Process::DisableSoftwareBreakpoint (site_id = %d) addr = 0x%llx -- FAILED: %s",
bp_site->GetID(),
(uint64_t)bp_addr,
error.AsCString());
return error;
}
size_t
Process::ReadMemory (addr_t addr, void *buf, size_t size, Error &error)
{
if (buf == NULL || size == 0)
return 0;
size_t bytes_read = 0;
uint8_t *bytes = (uint8_t *)buf;
while (bytes_read < size)
{
const size_t curr_size = size - bytes_read;
const size_t curr_bytes_read = DoReadMemory (addr + bytes_read,
bytes + bytes_read,
curr_size,
error);
bytes_read += curr_bytes_read;
if (curr_bytes_read == curr_size || curr_bytes_read == 0)
break;
}
// Replace any software breakpoint opcodes that fall into this range back
// into "buf" before we return
if (bytes_read > 0)
RemoveBreakpointOpcodesFromBuffer (addr, bytes_read, (uint8_t *)buf);
return bytes_read;
}
size_t
Process::WriteMemoryPrivate (addr_t addr, const void *buf, size_t size, Error &error)
{
size_t bytes_written = 0;
const uint8_t *bytes = (const uint8_t *)buf;
while (bytes_written < size)
{
const size_t curr_size = size - bytes_written;
const size_t curr_bytes_written = DoWriteMemory (addr + bytes_written,
bytes + bytes_written,
curr_size,
error);
bytes_written += curr_bytes_written;
if (curr_bytes_written == curr_size || curr_bytes_written == 0)
break;
}
return bytes_written;
}
size_t
Process::WriteMemory (addr_t addr, const void *buf, size_t size, Error &error)
{
if (buf == NULL || size == 0)
return 0;
// We need to write any data that would go where any current software traps
// (enabled software breakpoints) any software traps (breakpoints) that we
// may have placed in our tasks memory.
BreakpointSiteList::collection::const_iterator iter = m_breakpoint_site_list.GetMap()->lower_bound (addr);
BreakpointSiteList::collection::const_iterator end = m_breakpoint_site_list.GetMap()->end();
if (iter == end || iter->second->GetLoadAddress() > addr + size)
return DoWriteMemory(addr, buf, size, error);
BreakpointSiteList::collection::const_iterator pos;
size_t bytes_written = 0;
addr_t intersect_addr = 0;
size_t intersect_size = 0;
size_t opcode_offset = 0;
const uint8_t *ubuf = (const uint8_t *)buf;
for (pos = iter; pos != end; ++pos)
{
BreakpointSiteSP bp;
bp = pos->second;
assert(bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset));
assert(addr <= intersect_addr && intersect_addr < addr + size);
assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size);
assert(opcode_offset + intersect_size <= bp->GetByteSize());
// Check for bytes before this breakpoint
const addr_t curr_addr = addr + bytes_written;
if (intersect_addr > curr_addr)
{
// There are some bytes before this breakpoint that we need to
// just write to memory
size_t curr_size = intersect_addr - curr_addr;
size_t curr_bytes_written = WriteMemoryPrivate (curr_addr,
ubuf + bytes_written,
curr_size,
error);
bytes_written += curr_bytes_written;
if (curr_bytes_written != curr_size)
{
// We weren't able to write all of the requested bytes, we
// are done looping and will return the number of bytes that
// we have written so far.
break;
}
}
// Now write any bytes that would cover up any software breakpoints
// directly into the breakpoint opcode buffer
::memcpy(bp->GetSavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size);
bytes_written += intersect_size;
}
// Write any remaining bytes after the last breakpoint if we have any left
if (bytes_written < size)
bytes_written += WriteMemoryPrivate (addr + bytes_written,
ubuf + bytes_written,
size - bytes_written,
error);
return bytes_written;
}
addr_t
Process::AllocateMemory(size_t size, uint32_t permissions, Error &error)
{
// Fixme: we should track the blocks we've allocated, and clean them up...
// We could even do our own allocator here if that ends up being more efficient.
return DoAllocateMemory (size, permissions, error);
}
Error
Process::DeallocateMemory (addr_t ptr)
{
return DoDeallocateMemory (ptr);
}
Error
Process::EnableWatchpoint (WatchpointLocation *watchpoint)
{
Error error;
error.SetErrorString("watchpoints are not supported");
return error;
}
Error
Process::DisableWatchpoint (WatchpointLocation *watchpoint)
{
Error error;
error.SetErrorString("watchpoints are not supported");
return error;
}
StateType
Process::WaitForProcessStopPrivate (const TimeValue *timeout, EventSP &event_sp)
{
StateType state;
// Now wait for the process to launch and return control to us, and then
// call DidLaunch:
while (1)
{
// FIXME: Might want to put a timeout in here:
state = WaitForStateChangedEventsPrivate (NULL, event_sp);
if (state == eStateStopped || state == eStateCrashed || state == eStateExited)
break;
else
HandlePrivateEvent (event_sp);
}
return state;
}
Error
Process::Launch
(
char const *argv[],
char const *envp[],
uint32_t launch_flags,
const char *stdin_path,
const char *stdout_path,
const char *stderr_path
)
{
Error error;
m_target_triple.Clear();
m_abi_sp.reset();
Module *exe_module = m_target.GetExecutableModule().get();
if (exe_module)
{
char exec_file_path[PATH_MAX];
exe_module->GetFileSpec().GetPath(exec_file_path, sizeof(exec_file_path));
if (exe_module->GetFileSpec().Exists())
{
error = WillLaunch (exe_module);
if (error.Success())
{
// The args coming in should not contain the application name, the
// lldb_private::Process class will add this in case the executable
// gets resolved to a different file than was given on the command
// line (like when an applicaiton bundle is specified and will
// resolve to the contained exectuable file, or the file given was
// a symlink or other file system link that resolves to a different
// file).
// Get the resolved exectuable path
// Make a new argument vector
std::vector<const char *> exec_path_plus_argv;
// Append the resolved executable path
exec_path_plus_argv.push_back (exec_file_path);
// Push all args if there are any
if (argv)
{
for (int i = 0; argv[i]; ++i)
exec_path_plus_argv.push_back(argv[i]);
}
// Push a NULL to terminate the args.
exec_path_plus_argv.push_back(NULL);
// Now launch using these arguments.
error = DoLaunch (exe_module,
exec_path_plus_argv.empty() ? NULL : &exec_path_plus_argv.front(),
envp,
launch_flags,
stdin_path,
stdout_path,
stderr_path);
if (error.Fail())
{
if (GetID() != LLDB_INVALID_PROCESS_ID)
{
SetID (LLDB_INVALID_PROCESS_ID);
const char *error_string = error.AsCString();
if (error_string == NULL)
error_string = "launch failed";
SetExitStatus (-1, error_string);
}
}
else
{
EventSP event_sp;
StateType state = WaitForProcessStopPrivate(NULL, event_sp);
if (state == eStateStopped || state == eStateCrashed)
{
DidLaunch ();
// This delays passing the stopped event to listeners till DidLaunch gets
// a chance to complete...
HandlePrivateEvent (event_sp);
StartPrivateStateThread ();
}
else if (state == eStateExited)
{
// We exited while trying to launch somehow. Don't call DidLaunch as that's
// not likely to work, and return an invalid pid.
HandlePrivateEvent (event_sp);
}
}
}
}
else
{
error.SetErrorStringWithFormat("File doesn't exist: '%s'.\n", exec_file_path);
}
}
return error;
}
Error
Process::CompleteAttach ()
{
Error error;
EventSP event_sp;
StateType state = WaitForProcessStopPrivate(NULL, event_sp);
if (state == eStateStopped || state == eStateCrashed)
{
DidAttach ();
// Figure out which one is the executable, and set that in our target:
ModuleList &modules = GetTarget().GetImages();
size_t num_modules = modules.GetSize();
for (int i = 0; i < num_modules; i++)
{
ModuleSP module_sp = modules.GetModuleAtIndex(i);
if (module_sp->IsExecutable())
{
ModuleSP exec_module = GetTarget().GetExecutableModule();
if (!exec_module || exec_module != module_sp)
{
GetTarget().SetExecutableModule (module_sp, false);
}
break;
}
}
// This delays passing the stopped event to listeners till DidLaunch gets
// a chance to complete...
HandlePrivateEvent(event_sp);
StartPrivateStateThread();
}
else
{
// We exited while trying to launch somehow. Don't call DidLaunch as that's
// not likely to work, and return an invalid pid.
if (state == eStateExited)
HandlePrivateEvent (event_sp);
error.SetErrorStringWithFormat("invalid state after attach: %s",
lldb_private::StateAsCString(state));
}
return error;
}
Error
Process::Attach (lldb::pid_t attach_pid)
{
m_target_triple.Clear();
m_abi_sp.reset();
// Find the process and its architecture. Make sure it matches the architecture
// of the current Target, and if not adjust it.
ArchSpec attach_spec = GetArchSpecForExistingProcess (attach_pid);
if (attach_spec != GetTarget().GetArchitecture())
{
// Set the architecture on the target.
GetTarget().SetArchitecture(attach_spec);
}
Error error (WillAttachToProcessWithID(attach_pid));
if (error.Success())
{
error = DoAttachToProcessWithID (attach_pid);
if (error.Success())
{
error = CompleteAttach();
}
else
{
if (GetID() != LLDB_INVALID_PROCESS_ID)
{
SetID (LLDB_INVALID_PROCESS_ID);
const char *error_string = error.AsCString();
if (error_string == NULL)
error_string = "attach failed";
SetExitStatus(-1, error_string);
}
}
}
return error;
}
Error
Process::Attach (const char *process_name, bool wait_for_launch)
{
m_target_triple.Clear();
m_abi_sp.reset();
// Find the process and its architecture. Make sure it matches the architecture
// of the current Target, and if not adjust it.
if (!wait_for_launch)
{
ArchSpec attach_spec = GetArchSpecForExistingProcess (process_name);
if (attach_spec != GetTarget().GetArchitecture())
{
// Set the architecture on the target.
GetTarget().SetArchitecture(attach_spec);
}
}
Error error (WillAttachToProcessWithName(process_name, wait_for_launch));
if (error.Success())
{
StartPrivateStateThread();
error = DoAttachToProcessWithName (process_name, wait_for_launch);
if (error.Fail())
{
if (GetID() != LLDB_INVALID_PROCESS_ID)
{
SetID (LLDB_INVALID_PROCESS_ID);
const char *error_string = error.AsCString();
if (error_string == NULL)
error_string = "attach failed";
SetExitStatus(-1, error_string);
}
}
else
{
error = CompleteAttach();
}
}
return error;
}
Error
Process::Resume ()
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf("Process::Resume() m_stop_id = %u", m_stop_id);
Error error (WillResume());
// Tell the process it is about to resume before the thread list
if (error.Success())
{
// Now let the thread list know we are about to resume to it
// can let all of our threads know that they are about to be
// resumed. Threads will each be called with
// Thread::WillResume(StateType) where StateType contains the state
// that they are supposed to have when the process is resumed
// (suspended/running/stepping). Threads should also check
// their resume signal in lldb::Thread::GetResumeSignal()
// to see if they are suppoed to start back up with a signal.
if (m_thread_list.WillResume())
{
error = DoResume();
if (error.Success())
{
DidResume();
m_thread_list.DidResume();
}
}
else
{
error.SetErrorStringWithFormat("thread list returned flase after WillResume");
}
}
return error;
}
Error
Process::Halt ()
{
Error error (WillHalt());
if (error.Success())
{
error = DoHalt();
if (error.Success())
DidHalt();
}
return error;
}
Error
Process::Detach ()
{
Error error (WillDetach());
if (error.Success())
{
DisableAllBreakpointSites();
error = DoDetach();
if (error.Success())
{
DidDetach();
StopPrivateStateThread();
}
}
return error;
}
Error
Process::Destroy ()
{
Error error (WillDestroy());
if (error.Success())
{
DisableAllBreakpointSites();
error = DoDestroy();
if (error.Success())
{
DidDestroy();
StopPrivateStateThread();
}
}
return error;
}
Error
Process::Signal (int signal)
{
Error error (WillSignal());
if (error.Success())
{
error = DoSignal(signal);
if (error.Success())
DidSignal();
}
return error;
}
UnixSignals &
Process::GetUnixSignals ()
{
return m_unix_signals;
}
Target &
Process::GetTarget ()
{
return m_target;
}
const Target &
Process::GetTarget () const
{
return m_target;
}
uint32_t
Process::GetAddressByteSize()
{
return m_target.GetArchitecture().GetAddressByteSize();
}
bool
Process::ShouldBroadcastEvent (Event *event_ptr)
{
const StateType state = Process::ProcessEventData::GetStateFromEvent (event_ptr);
bool return_value = true;
Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS);
switch (state)
{
case eStateAttaching:
case eStateLaunching:
case eStateDetached:
case eStateExited:
case eStateUnloaded:
// These events indicate changes in the state of the debugging session, always report them.
return_value = true;
break;
case eStateInvalid:
// We stopped for no apparent reason, don't report it.
return_value = false;
break;
case eStateRunning:
case eStateStepping:
// If we've started the target running, we handle the cases where we
// are already running and where there is a transition from stopped to
// running differently.
// running -> running: Automatically suppress extra running events
// stopped -> running: Report except when there is one or more no votes
// and no yes votes.
SynchronouslyNotifyStateChanged (state);
switch (m_public_state.GetValue())
{
case eStateRunning:
case eStateStepping:
// We always suppress multiple runnings with no PUBLIC stop in between.
return_value = false;
break;
default:
// TODO: make this work correctly. For now always report
// run if we aren't running so we don't miss any runnning
// events. If I run the lldb/test/thread/a.out file and
// break at main.cpp:58, run and hit the breakpoints on
// multiple threads, then somehow during the stepping over
// of all breakpoints no run gets reported.
return_value = true;
// This is a transition from stop to run.
switch (m_thread_list.ShouldReportRun (event_ptr))
{
case eVoteYes:
case eVoteNoOpinion:
return_value = true;
break;
case eVoteNo:
return_value = false;
break;
}
break;
}
break;
case eStateStopped:
case eStateCrashed:
case eStateSuspended:
{
// We've stopped. First see if we're going to restart the target.
// If we are going to stop, then we always broadcast the event.
// If we aren't going to stop, let the thread plans decide if we're going to report this event.
// If no thread has an opinion, we don't report it.
if (state != eStateInvalid)
{
RefreshStateAfterStop ();
if (m_thread_list.ShouldStop (event_ptr) == false)
{
switch (m_thread_list.ShouldReportStop (event_ptr))
{
case eVoteYes:
Process::ProcessEventData::SetRestartedInEvent (event_ptr, true);
case eVoteNoOpinion:
case eVoteNo:
return_value = false;
break;
}
if (log)
log->Printf ("Process::ShouldBroadcastEvent (%p) Restarting process", event_ptr, StateAsCString(state));
Resume ();
}
else
{
return_value = true;
SynchronouslyNotifyStateChanged (state);
}
}
}
}
if (log)
log->Printf ("Process::ShouldBroadcastEvent (%p) => %s", event_ptr, StateAsCString(state), return_value ? "YES" : "NO");
return return_value;
}
//------------------------------------------------------------------
// Thread Queries
//------------------------------------------------------------------
ThreadList &
Process::GetThreadList ()
{
return m_thread_list;
}
const ThreadList &
Process::GetThreadList () const
{
return m_thread_list;
}
bool
Process::StartPrivateStateThread ()
{
Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS);
if (log)
log->Printf ("Process::%s ( )", __FUNCTION__);
// Create a thread that watches our internal state and controls which
// events make it to clients (into the DCProcess event queue).
m_private_state_thread = Host::ThreadCreate ("<lldb.process.internal-state>", Process::PrivateStateThread, this, NULL);
return m_private_state_thread != LLDB_INVALID_HOST_THREAD;
}
void
Process::PausePrivateStateThread ()
{
ControlPrivateStateThread (eBroadcastInternalStateControlPause);
}
void
Process::ResumePrivateStateThread ()
{
ControlPrivateStateThread (eBroadcastInternalStateControlResume);
}
void
Process::StopPrivateStateThread ()
{
ControlPrivateStateThread (eBroadcastInternalStateControlStop);
}
void
Process::ControlPrivateStateThread (uint32_t signal)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EVENTS);
assert (signal == eBroadcastInternalStateControlStop ||
signal == eBroadcastInternalStateControlPause ||
signal == eBroadcastInternalStateControlResume);
if (log)
log->Printf ("Process::%s ( ) - signal: %d", __FUNCTION__, signal);
// Signal the private state thread
if (m_private_state_thread != LLDB_INVALID_HOST_THREAD)
{
TimeValue timeout_time;
bool timed_out;
m_private_state_control_broadcaster.BroadcastEvent (signal, NULL);
timeout_time = TimeValue::Now();
timeout_time.OffsetWithSeconds(2);
m_private_state_control_wait.WaitForValueEqualTo (true, &timeout_time, &timed_out);
m_private_state_control_wait.SetValue (false, eBroadcastNever);
if (signal == eBroadcastInternalStateControlStop)
{
if (timed_out)
Host::ThreadCancel (m_private_state_thread, NULL);
thread_result_t result = NULL;
Host::ThreadJoin (m_private_state_thread, &result, NULL);
m_private_state_thread = LLDB_INVALID_HOST_THREAD;
}
}
}
void
Process::HandlePrivateEvent (EventSP &event_sp)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
// See if we should broadcast this state to external clients?
const bool should_broadcast = ShouldBroadcastEvent (event_sp.get());
if (log)
log->Printf ("Process::%s (arg = %p, pid = %i) got event '%s' broadcast = %s", __FUNCTION__, this, GetID(), StateAsCString(internal_state), should_broadcast ? "yes" : "no");
if (should_broadcast)
{
if (log)
{
log->Printf ("\tChanging public state from: %s to %s", StateAsCString(GetState ()), StateAsCString (internal_state));
}
Process::ProcessEventData::SetUpdateStateOnRemoval(event_sp.get());
BroadcastEvent (event_sp);
}
else
{
if (log)
{
log->Printf ("\tNot changing public state with event: %s", StateAsCString (internal_state));
}
}
}
void *
Process::PrivateStateThread (void *arg)
{
Process *proc = static_cast<Process*> (arg);
void *result = proc->RunPrivateStateThread ();
return result;
}
void *
Process::RunPrivateStateThread ()
{
bool control_only = false;
m_private_state_control_wait.SetValue (false, eBroadcastNever);
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("Process::%s (arg = %p, pid = %i) thread starting...", __FUNCTION__, this, GetID());
bool exit_now = false;
while (!exit_now)
{
EventSP event_sp;
WaitForEventsPrivate (NULL, event_sp, control_only);
if (event_sp->BroadcasterIs(&m_private_state_control_broadcaster))
{
switch (event_sp->GetType())
{
case eBroadcastInternalStateControlStop:
exit_now = true;
continue; // Go to next loop iteration so we exit without
break; // doing any internal state managment below
case eBroadcastInternalStateControlPause:
control_only = true;
break;
case eBroadcastInternalStateControlResume:
control_only = false;
break;
}
m_private_state_control_wait.SetValue (true, eBroadcastAlways);
}
const StateType internal_state = Process::ProcessEventData::GetStateFromEvent(event_sp.get());
if (internal_state != eStateInvalid)
{
HandlePrivateEvent (event_sp);
}
if (internal_state == eStateInvalid || internal_state == eStateExited)
break;
}
if (log)
log->Printf ("Process::%s (arg = %p, pid = %i) thread exiting...", __FUNCTION__, this, GetID());
m_private_state_thread = LLDB_INVALID_HOST_THREAD;
return NULL;
}
addr_t
Process::GetSectionLoadAddress (const Section *section) const
{
// TODO: add support for the same section having multiple load addresses
addr_t section_load_addr = LLDB_INVALID_ADDRESS;
if (m_section_load_info.GetFirstKeyForValue (section, section_load_addr))
return section_load_addr;
return LLDB_INVALID_ADDRESS;
}
bool
Process::SectionLoaded (const Section *section, addr_t load_addr)
{
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_SHLIB | LIBLLDB_LOG_VERBOSE);
if (log)
log->Printf ("Process::%s (section = %p (%s.%s), load_addr = 0x%16.16llx)",
__FUNCTION__,
section,
section->GetModule()->GetFileSpec().GetFilename().AsCString(),
section->GetName().AsCString(),
load_addr);
const Section *existing_section = NULL;
Mutex::Locker locker(m_section_load_info.GetMutex());
if (m_section_load_info.GetValueForKeyNoLock (load_addr, existing_section))
{
if (existing_section == section)
return false; // No change
}
m_section_load_info.SetValueForKeyNoLock (load_addr, section);
return true; // Changed
}
size_t
Process::SectionUnloaded (const Section *section)
{
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_SHLIB | LIBLLDB_LOG_VERBOSE);
if (log)
log->Printf ("Process::%s (section = %p (%s.%s))",
__FUNCTION__,
section,
section->GetModule()->GetFileSpec().GetFilename().AsCString(),
section->GetName().AsCString());
Mutex::Locker locker(m_section_load_info.GetMutex());
size_t unload_count = 0;
addr_t section_load_addr;
while (m_section_load_info.GetFirstKeyForValueNoLock (section, section_load_addr))
{
unload_count += m_section_load_info.EraseNoLock (section_load_addr);
}
return unload_count;
}
bool
Process::SectionUnloaded (const Section *section, addr_t load_addr)
{
Log *log = lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_SHLIB | LIBLLDB_LOG_VERBOSE);
if (log)
log->Printf ("Process::%s (section = %p (%s.%s), load_addr = 0x%16.16llx)",
__FUNCTION__,
section,
section->GetModule()->GetFileSpec().GetFilename().AsCString(),
section->GetName().AsCString(),
load_addr);
return m_section_load_info.Erase (load_addr) == 1;
}
bool
Process::ResolveLoadAddress (addr_t load_addr, Address &so_addr) const
{
addr_t section_load_addr = LLDB_INVALID_ADDRESS;
const Section *section = NULL;
// First find the top level section that this load address exists in
if (m_section_load_info.LowerBound (load_addr, section_load_addr, section, true))
{
addr_t offset = load_addr - section_load_addr;
if (offset < section->GetByteSize())
{
// We have found the top level section, now we need to find the
// deepest child section.
return section->ResolveContainedAddress (offset, so_addr);
}
}
so_addr.Clear();
return false;
}
//------------------------------------------------------------------
// Process Event Data
//------------------------------------------------------------------
Process::ProcessEventData::ProcessEventData () :
EventData (),
m_process_sp (),
m_state (eStateInvalid),
m_restarted (false),
m_update_state (false)
{
}
Process::ProcessEventData::ProcessEventData (const ProcessSP &process_sp, StateType state) :
EventData (),
m_process_sp (process_sp),
m_state (state),
m_restarted (false),
m_update_state (false)
{
}
Process::ProcessEventData::~ProcessEventData()
{
}
const ConstString &
Process::ProcessEventData::GetFlavorString ()
{
static ConstString g_flavor ("Process::ProcessEventData");
return g_flavor;
}
const ConstString &
Process::ProcessEventData::GetFlavor () const
{
return ProcessEventData::GetFlavorString ();
}
const ProcessSP &
Process::ProcessEventData::GetProcessSP () const
{
return m_process_sp;
}
StateType
Process::ProcessEventData::GetState () const
{
return m_state;
}
bool
Process::ProcessEventData::GetRestarted () const
{
return m_restarted;
}
void
Process::ProcessEventData::SetRestarted (bool new_value)
{
m_restarted = new_value;
}
void
Process::ProcessEventData::DoOnRemoval (Event *event_ptr)
{
// This function gets called twice for each event, once when the event gets pulled
// off of the private process event queue, and once when it gets pulled off of
// the public event queue. m_update_state is used to distinguish these
// two cases; it is false when we're just pulling it off for private handling,
// and we don't want to do the breakpoint command handling then.
if (!m_update_state)
return;
m_process_sp->SetPublicState (m_state);
// If we're stopped and haven't restarted, then do the breakpoint commands here:
if (m_state == eStateStopped && ! m_restarted)
{
int num_threads = m_process_sp->GetThreadList().GetSize();
int idx;
for (idx = 0; idx < num_threads; ++idx)
{
lldb::ThreadSP thread_sp = m_process_sp->GetThreadList().GetThreadAtIndex(idx);
StopInfo *stop_info = thread_sp->GetStopInfo ();
if (stop_info)
{
stop_info->PerformAction(event_ptr);
}
}
// The stop action might restart the target. If it does, then we want to mark that in the
// event so that whoever is receiving it will know to wait for the running event and reflect
// that state appropriately.
if (m_process_sp->GetPrivateState() == eStateRunning)
SetRestarted(true);
}
}
void
Process::ProcessEventData::Dump (Stream *s) const
{
if (m_process_sp)
s->Printf(" process = %p (pid = %u), ", m_process_sp.get(), m_process_sp->GetID());
s->Printf("state = %s", StateAsCString(GetState()));;
}
const Process::ProcessEventData *
Process::ProcessEventData::GetEventDataFromEvent (const Event *event_ptr)
{
if (event_ptr)
{
const EventData *event_data = event_ptr->GetData();
if (event_data && event_data->GetFlavor() == ProcessEventData::GetFlavorString())
return static_cast <const ProcessEventData *> (event_ptr->GetData());
}
return NULL;
}
ProcessSP
Process::ProcessEventData::GetProcessFromEvent (const Event *event_ptr)
{
ProcessSP process_sp;
const ProcessEventData *data = GetEventDataFromEvent (event_ptr);
if (data)
process_sp = data->GetProcessSP();
return process_sp;
}
StateType
Process::ProcessEventData::GetStateFromEvent (const Event *event_ptr)
{
const ProcessEventData *data = GetEventDataFromEvent (event_ptr);
if (data == NULL)
return eStateInvalid;
else
return data->GetState();
}
bool
Process::ProcessEventData::GetRestartedFromEvent (const Event *event_ptr)
{
const ProcessEventData *data = GetEventDataFromEvent (event_ptr);
if (data == NULL)
return false;
else
return data->GetRestarted();
}
void
Process::ProcessEventData::SetRestartedInEvent (Event *event_ptr, bool new_value)
{
ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr));
if (data != NULL)
data->SetRestarted(new_value);
}
bool
Process::ProcessEventData::SetUpdateStateOnRemoval (Event *event_ptr)
{
ProcessEventData *data = const_cast<ProcessEventData *>(GetEventDataFromEvent (event_ptr));
if (data)
{
data->SetUpdateStateOnRemoval();
return true;
}
return false;
}
void
Process::ProcessEventData::SetUpdateStateOnRemoval()
{
m_update_state = true;
}
Target *
Process::CalculateTarget ()
{
return &m_target;
}
Process *
Process::CalculateProcess ()
{
return this;
}
Thread *
Process::CalculateThread ()
{
return NULL;
}
StackFrame *
Process::CalculateStackFrame ()
{
return NULL;
}
void
Process::Calculate (ExecutionContext &exe_ctx)
{
exe_ctx.target = &m_target;
exe_ctx.process = this;
exe_ctx.thread = NULL;
exe_ctx.frame = NULL;
}
lldb::ProcessSP
Process::GetSP ()
{
return GetTarget().GetProcessSP();
}
ClangPersistentVariables &
Process::GetPersistentVariables()
{
return m_persistent_vars;
}
ObjCObjectPrinter &
Process::GetObjCObjectPrinter()
{
return m_objc_object_printer;
}
uint32_t
Process::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids)
{
return 0;
}
ArchSpec
Process::GetArchSpecForExistingProcess (lldb::pid_t pid)
{
return Host::GetArchSpecForExistingProcess (pid);
}
ArchSpec
Process::GetArchSpecForExistingProcess (const char *process_name)
{
return Host::GetArchSpecForExistingProcess (process_name);
}
lldb::UserSettingsControllerSP
Process::GetSettingsController (bool finish)
{
static UserSettingsControllerSP g_settings_controller (new ProcessSettingsController);
static bool initialized = false;
if (!initialized)
{
const lldb::UserSettingsControllerSP &parent = g_settings_controller->GetParent ();
if (parent)
parent->RegisterChild (g_settings_controller);
g_settings_controller->CreateSettingsVector (Process::ProcessSettingsController::global_settings_table,
true);
g_settings_controller->CreateSettingsVector (Process::ProcessSettingsController::instance_settings_table,
false);
g_settings_controller->InitializeGlobalVariables ();
g_settings_controller->CreateDefaultInstanceSettings ();
initialized = true;
}
if (finish)
{
const lldb::UserSettingsControllerSP &parent = g_settings_controller->GetParent ();
if (parent)
parent->RemoveChild (g_settings_controller);
g_settings_controller.reset();
}
return g_settings_controller;
}
//--------------------------------------------------------------
// class Process::ProcessSettingsController
//--------------------------------------------------------------
Process::ProcessSettingsController::ProcessSettingsController () :
UserSettingsController ("process", Debugger::GetSettingsController())
{
m_default_settings.reset (new ProcessInstanceSettings (*this, InstanceSettings::GetDefaultName().AsCString()));
}
Process::ProcessSettingsController::~ProcessSettingsController ()
{
}
lldb::InstanceSettingsSP
Process::ProcessSettingsController::CreateNewInstanceSettings ()
{
ProcessInstanceSettings *new_settings = new ProcessInstanceSettings (*(Process::GetSettingsController().get()));
lldb::InstanceSettingsSP new_settings_sp (new_settings);
return new_settings_sp;
}
//--------------------------------------------------------------
// class ProcessInstanceSettings
//--------------------------------------------------------------
ProcessInstanceSettings::ProcessInstanceSettings (UserSettingsController &owner, const char *name) :
InstanceSettings (owner, (name == NULL ? CreateInstanceName().AsCString() : name)),
m_run_args (),
m_env_vars (),
m_input_path (),
m_output_path (),
m_error_path (),
m_plugin (),
m_disable_aslr (true)
{
if (m_instance_name != InstanceSettings::GetDefaultName())
{
const lldb::InstanceSettingsSP &pending_settings = m_owner.FindPendingSettings (m_instance_name);
CopyInstanceSettings (pending_settings,false);
m_owner.RemovePendingSettings (m_instance_name);
}
}
ProcessInstanceSettings::ProcessInstanceSettings (const ProcessInstanceSettings &rhs) :
InstanceSettings (*(Process::GetSettingsController().get()), CreateInstanceName().AsCString()),
m_run_args (rhs.m_run_args),
m_env_vars (rhs.m_env_vars),
m_input_path (rhs.m_input_path),
m_output_path (rhs.m_output_path),
m_error_path (rhs.m_error_path),
m_plugin (rhs.m_plugin),
m_disable_aslr (rhs.m_disable_aslr)
{
if (m_instance_name != InstanceSettings::GetDefaultName())
{
const lldb::InstanceSettingsSP &pending_settings = m_owner.FindPendingSettings (m_instance_name);
CopyInstanceSettings (pending_settings,false);
m_owner.RemovePendingSettings (m_instance_name);
}
}
ProcessInstanceSettings::~ProcessInstanceSettings ()
{
}
ProcessInstanceSettings&
ProcessInstanceSettings::operator= (const ProcessInstanceSettings &rhs)
{
if (this != &rhs)
{
m_run_args = rhs.m_run_args;
m_env_vars = rhs.m_env_vars;
m_input_path = rhs.m_input_path;
m_output_path = rhs.m_output_path;
m_error_path = rhs.m_error_path;
m_plugin = rhs.m_plugin;
m_disable_aslr = rhs.m_disable_aslr;
}
return *this;
}
void
ProcessInstanceSettings::UpdateInstanceSettingsVariable (const ConstString &var_name,
const char *index_value,
const char *value,
const ConstString &instance_name,
const SettingEntry &entry,
lldb::VarSetOperationType op,
Error &err,
bool pending)
{
if (var_name == RunArgsVarName())
UserSettingsController::UpdateStringArrayVariable (op, index_value, m_run_args, value, err);
else if (var_name == EnvVarsVarName())
UserSettingsController::UpdateDictionaryVariable (op, index_value, m_env_vars, value, err);
else if (var_name == InputPathVarName())
UserSettingsController::UpdateStringVariable (op, m_input_path, value, err);
else if (var_name == OutputPathVarName())
UserSettingsController::UpdateStringVariable (op, m_output_path, value, err);
else if (var_name == ErrorPathVarName())
UserSettingsController::UpdateStringVariable (op, m_error_path, value, err);
else if (var_name == PluginVarName())
UserSettingsController::UpdateEnumVariable (entry.enum_values, (int *) &m_plugin, value, err);
else if (var_name == DisableASLRVarName())
UserSettingsController::UpdateBooleanVariable (op, m_disable_aslr, value, err);
}
void
ProcessInstanceSettings::CopyInstanceSettings (const lldb::InstanceSettingsSP &new_settings,
bool pending)
{
if (new_settings.get() == NULL)
return;
ProcessInstanceSettings *new_process_settings = (ProcessInstanceSettings *) new_settings.get();
m_run_args = new_process_settings->m_run_args;
m_env_vars = new_process_settings->m_env_vars;
m_input_path = new_process_settings->m_input_path;
m_output_path = new_process_settings->m_output_path;
m_error_path = new_process_settings->m_error_path;
m_plugin = new_process_settings->m_plugin;
m_disable_aslr = new_process_settings->m_disable_aslr;
}
void
Process::ProcessSettingsController::UpdateGlobalVariable (const ConstString &var_name,
const char *index_value,
const char *value,
const SettingEntry &entry,
lldb::VarSetOperationType op,
Error&err)
{
// Currently 'process' does not have any global settings.
}
void
ProcessInstanceSettings::GetInstanceSettingsValue (const SettingEntry &entry,
const ConstString &var_name,
StringList &value)
{
if (var_name == RunArgsVarName())
{
if (m_run_args.GetArgumentCount() > 0)
for (int i = 0; i < m_run_args.GetArgumentCount(); ++i)
value.AppendString (m_run_args.GetArgumentAtIndex (i));
else
value.AppendString ("");
}
else if (var_name == EnvVarsVarName())
{
if (m_env_vars.size() > 0)
{
std::map<std::string, std::string>::iterator pos;
for (pos = m_env_vars.begin(); pos != m_env_vars.end(); ++pos)
{
StreamString value_str;
value_str.Printf ("%s=%s", pos->first.c_str(), pos->second.c_str());
value.AppendString (value_str.GetData());
}
}
else
value.AppendString ("");
}
else if (var_name == InputPathVarName())
{
value.AppendString (m_input_path.c_str());
}
else if (var_name == OutputPathVarName())
{
value.AppendString (m_output_path.c_str());
}
else if (var_name == ErrorPathVarName())
{
value.AppendString (m_error_path.c_str());
}
else if (var_name == PluginVarName())
{
value.AppendString (UserSettingsController::EnumToString (entry.enum_values, (int) m_plugin));
}
else if (var_name == DisableASLRVarName())
{
if (m_disable_aslr)
value.AppendString ("true");
else
value.AppendString ("false");
}
else
value.AppendString ("unrecognized variable name");
}
void
Process::ProcessSettingsController::GetGlobalSettingsValue (const ConstString &var_name,
StringList &value)
{
// Currently 'process' does not have any global settings.
}
const ConstString
ProcessInstanceSettings::CreateInstanceName ()
{
static int instance_count = 1;
StreamString sstr;
sstr.Printf ("process_%d", instance_count);
++instance_count;
const ConstString ret_val (sstr.GetData());
return ret_val;
}
const ConstString &
ProcessInstanceSettings::RunArgsVarName ()
{
static ConstString run_args_var_name ("run-args");
return run_args_var_name;
}
const ConstString &
ProcessInstanceSettings::EnvVarsVarName ()
{
static ConstString env_vars_var_name ("env-vars");
return env_vars_var_name;
}
const ConstString &
ProcessInstanceSettings::InputPathVarName ()
{
static ConstString input_path_var_name ("input-path");
return input_path_var_name;
}
const ConstString &
ProcessInstanceSettings::OutputPathVarName ()
{
static ConstString output_path_var_name ("output_path");
return output_path_var_name;
}
const ConstString &
ProcessInstanceSettings::ErrorPathVarName ()
{
static ConstString error_path_var_name ("error_path");
return error_path_var_name;
}
const ConstString &
ProcessInstanceSettings::PluginVarName ()
{
static ConstString plugin_var_name ("plugin");
return plugin_var_name;
}
const ConstString &
ProcessInstanceSettings::DisableASLRVarName ()
{
static ConstString disable_aslr_var_name ("disable-aslr");
return disable_aslr_var_name;
}
//--------------------------------------------------
// ProcessSettingsController Variable Tables
//--------------------------------------------------
SettingEntry
Process::ProcessSettingsController::global_settings_table[] =
{
//{ "var-name", var-type , "default", enum-table, init'd, hidden, "help-text"},
{ NULL, eSetVarTypeNone, NULL, NULL, 0, 0, NULL }
};
lldb::OptionEnumValueElement
Process::ProcessSettingsController::g_plugins[] =
{
{ eMacosx, "macosx", "Use the Mac OS X plugin" },
{ eRemoteDebugger, "remote_debugger" , "Use the remote debugger plugin" },
{ 0, NULL, NULL }
};
SettingEntry
Process::ProcessSettingsController::instance_settings_table[] =
{
//{ "var-name", var-type, "default", enum-table, init'd, hidden, "help-text"},
{ "run-args", eSetVarTypeArray, NULL, NULL, false, false, "A list containing all the arguments to be passed to the executable when it is run." },
{ "env-vars", eSetVarTypeDictionary, NULL, NULL, false, false, "A list of all the environment variables to be passed to the executable's environment, and their values." },
{ "input-path", eSetVarTypeString, "/dev/stdin", NULL, false, false, "The file/path to be used by the executable program for reading its input." },
{ "output-path", eSetVarTypeString, "/dev/stdout", NULL, false, false, "The file/path to be used by the executable program for writing its output." },
{ "error-path", eSetVarTypeString, "/dev/stderr", NULL, false, false, "The file/path to be used by the executable program for writings its error messages." },
{ "plugin", eSetVarTypeEnum, NULL , g_plugins, false, false, "The plugin to be used to run the process." },
{ "disable-aslr", eSetVarTypeBool, "true", NULL, false, false, "Disable Address Space Layout Randomization (ASLR)" },
{ NULL, eSetVarTypeNone, NULL, NULL, 0, 0, NULL }
};
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