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freebsd-dev/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessPOSIX.cpp
Ed Maste 1c3bbb013d Update LLDB snapshot to upstream r241361 
Notable upstream commits (upstream revision in parens):

- Add a JSON producer to LLDB (228636)
- Don't crash on bad DWARF expression (228729)
- Add support of DWARFv3 DW_OP_form_tls_address (231342)
- Assembly profiler for MIPS64 (232619)
- Handle FreeBSD/arm64 core files (233273)
- Read/Write register for MIPS64 (233685)
- Rework LLDB system initialization (233758)
- SysV ABI for aarch64 (236098)
- MIPS software single stepping (236696)
- FreeBSD/arm live debugging support (237303)
- Assembly profiler for mips32 (237420)
- Parse function name from DWARF DW_AT_abstract_origin (238307)
- Improve LLDB prompt handling (238313)
- Add real time signals support to FreeBSDSignals (238316)
- Fix race in IOHandlerProcessSTDIO (238423)
- MIPS64 Branch instruction emulation for SW single stepping (238820)
- Improve OSType initialization in elf object file's arch_spec (239148)
- Emulation of MIPS64 floating-point branch instructions (239996)
- ABI Plugin for MIPS32 (239997)
- ABI Plugin for MIPS64 (240123)
- MIPS32 branch emulation and single stepping (240373)
- Improve instruction emulation based stack unwinding on ARM (240533)
- Add branch emulation to aarch64 instruction emulator (240769)
2015-07-04 01:02:43 +00:00

940 lines
27 KiB
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Raw Blame History

//===-- ProcessPOSIX.cpp ----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
#include <errno.h>
// C++ Includes
// Other libraries and framework includes
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Breakpoint/Watchpoint.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/State.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/DynamicLoader.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Target.h"
#include "ProcessPOSIX.h"
#include "ProcessPOSIXLog.h"
#include "Plugins/Process/Utility/InferiorCallPOSIX.h"
#include "POSIXThread.h"
#include "ProcessMonitor.h"
#include "lldb/Host/posix/Fcntl.h"
using namespace lldb;
using namespace lldb_private;
//------------------------------------------------------------------------------
// Constructors and destructors.
ProcessPOSIX::ProcessPOSIX(Target& target, Listener &listener, UnixSignalsSP &unix_signals_sp)
: Process(target, listener, unix_signals_sp),
m_byte_order(lldb::endian::InlHostByteOrder()),
m_monitor(NULL),
m_module(NULL),
m_message_mutex (Mutex::eMutexTypeRecursive),
m_exit_now(false),
m_seen_initial_stop()
{
// FIXME: Putting this code in the ctor and saving the byte order in a
// member variable is a hack to avoid const qual issues in GetByteOrder.
lldb::ModuleSP module = GetTarget().GetExecutableModule();
if (module && module->GetObjectFile())
m_byte_order = module->GetObjectFile()->GetByteOrder();
}
ProcessPOSIX::~ProcessPOSIX()
{
delete m_monitor;
}
//------------------------------------------------------------------------------
// Process protocol.
void
ProcessPOSIX::Finalize()
{
Process::Finalize();
if (m_monitor)
m_monitor->StopMonitor();
}
bool
ProcessPOSIX::CanDebug(Target &target, bool plugin_specified_by_name)
{
// For now we are just making sure the file exists for a given module
ModuleSP exe_module_sp(target.GetExecutableModule());
if (exe_module_sp.get())
return exe_module_sp->GetFileSpec().Exists();
// If there is no executable module, we return true since we might be preparing to attach.
return true;
}
Error
ProcessPOSIX::DoAttachToProcessWithID (lldb::pid_t pid, const ProcessAttachInfo &attach_info)
{
Error error;
assert(m_monitor == NULL);
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS));
if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
log->Printf ("ProcessPOSIX::%s(pid = %" PRIi64 ")", __FUNCTION__, GetID());
m_monitor = new ProcessMonitor(this, pid, error);
if (!error.Success())
return error;
PlatformSP platform_sp (m_target.GetPlatform ());
assert (platform_sp.get());
if (!platform_sp)
return error; // FIXME: Detatch?
// Find out what we can about this process
ProcessInstanceInfo process_info;
platform_sp->GetProcessInfo (pid, process_info);
// Resolve the executable module
ModuleSP exe_module_sp;
FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths());
ModuleSpec exe_module_spec(process_info.GetExecutableFile(), m_target.GetArchitecture());
error = platform_sp->ResolveExecutable(exe_module_spec,
exe_module_sp,
executable_search_paths.GetSize() ? &executable_search_paths : NULL);
if (!error.Success())
return error;
// Fix the target architecture if necessary
const ArchSpec &module_arch = exe_module_sp->GetArchitecture();
if (module_arch.IsValid() && !m_target.GetArchitecture().IsExactMatch(module_arch))
m_target.SetArchitecture(module_arch);
// Initialize the target module list
m_target.SetExecutableModule (exe_module_sp, true);
SetSTDIOFileDescriptor(m_monitor->GetTerminalFD());
SetID(pid);
return error;
}
Error
ProcessPOSIX::WillLaunch(Module* module)
{
Error error;
return error;
}
FileSpec
ProcessPOSIX::GetFileSpec(const lldb_private::FileAction *file_action,
const FileSpec &default_file_spec,
const FileSpec &dbg_pts_file_spec)
{
FileSpec file_spec{};
if (file_action && file_action->GetAction() == FileAction::eFileActionOpen)
{
file_spec = file_action->GetFileSpec();
// By default the stdio paths passed in will be pseudo-terminal
// (/dev/pts). If so, convert to using a different default path
// instead to redirect I/O to the debugger console. This should
// also handle user overrides to /dev/null or a different file.
if (!file_spec || file_spec == dbg_pts_file_spec)
file_spec = default_file_spec;
}
return file_spec;
}
Error
ProcessPOSIX::DoLaunch (Module *module,
ProcessLaunchInfo &launch_info)
{
Error error;
assert(m_monitor == NULL);
FileSpec working_dir = launch_info.GetWorkingDirectory();
if (working_dir &&
(!working_dir.ResolvePath() ||
working_dir.GetFileType() != FileSpec::eFileTypeDirectory))
{
error.SetErrorStringWithFormat("No such file or directory: %s",
working_dir.GetCString());
return error;
}
SetPrivateState(eStateLaunching);
const lldb_private::FileAction *file_action;
// Default of empty will mean to use existing open file descriptors
FileSpec stdin_file_spec{};
FileSpec stdout_file_spec{};
FileSpec stderr_file_spec{};
const FileSpec dbg_pts_file_spec{launch_info.GetPTY().GetSlaveName(NULL,0), false};
file_action = launch_info.GetFileActionForFD (STDIN_FILENO);
stdin_file_spec = GetFileSpec(file_action, stdin_file_spec, dbg_pts_file_spec);
file_action = launch_info.GetFileActionForFD (STDOUT_FILENO);
stdout_file_spec = GetFileSpec(file_action, stdout_file_spec, dbg_pts_file_spec);
file_action = launch_info.GetFileActionForFD (STDERR_FILENO);
stderr_file_spec = GetFileSpec(file_action, stderr_file_spec, dbg_pts_file_spec);
m_monitor = new ProcessMonitor(this,
module,
launch_info.GetArguments().GetConstArgumentVector(),
launch_info.GetEnvironmentEntries().GetConstArgumentVector(),
stdin_file_spec,
stdout_file_spec,
stderr_file_spec,
working_dir,
launch_info,
error);
m_module = module;
if (!error.Success())
return error;
int terminal = m_monitor->GetTerminalFD();
if (terminal >= 0) {
// The reader thread will close the file descriptor when done, so we pass it a copy.
int stdio = fcntl(terminal, F_DUPFD_CLOEXEC, 0);
if (stdio == -1) {
error.SetErrorToErrno();
return error;
}
SetSTDIOFileDescriptor(stdio);
}
SetID(m_monitor->GetPID());
return error;
}
void
ProcessPOSIX::DidLaunch()
{
}
Error
ProcessPOSIX::DoResume()
{
StateType state = GetPrivateState();
assert(state == eStateStopped);
SetPrivateState(eStateRunning);
bool did_resume = false;
Mutex::Locker lock(m_thread_list.GetMutex());
uint32_t thread_count = m_thread_list.GetSize(false);
for (uint32_t i = 0; i < thread_count; ++i)
{
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(i, false).get());
did_resume = thread->Resume() || did_resume;
}
assert(did_resume && "Process resume failed!");
return Error();
}
addr_t
ProcessPOSIX::GetImageInfoAddress()
{
Target *target = &GetTarget();
ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile();
Address addr = obj_file->GetImageInfoAddress(target);
if (addr.IsValid())
return addr.GetLoadAddress(target);
return LLDB_INVALID_ADDRESS;
}
Error
ProcessPOSIX::DoHalt(bool &caused_stop)
{
Error error;
if (IsStopped())
{
caused_stop = false;
}
else if (kill(GetID(), SIGSTOP))
{
caused_stop = false;
error.SetErrorToErrno();
}
else
{
caused_stop = true;
}
return error;
}
Error
ProcessPOSIX::DoSignal(int signal)
{
Error error;
if (kill(GetID(), signal))
error.SetErrorToErrno();
return error;
}
Error
ProcessPOSIX::DoDestroy()
{
Error error;
if (!HasExited())
{
assert(m_monitor);
m_exit_now = true;
if (GetID() == LLDB_INVALID_PROCESS_ID)
{
error.SetErrorString("invalid process id");
return error;
}
if (!m_monitor->Kill())
{
error.SetErrorToErrno();
return error;
}
SetPrivateState(eStateExited);
}
return error;
}
void
ProcessPOSIX::DoDidExec()
{
Target *target = &GetTarget();
if (target)
{
PlatformSP platform_sp (target->GetPlatform());
assert (platform_sp.get());
if (platform_sp)
{
ProcessInstanceInfo process_info;
platform_sp->GetProcessInfo(GetID(), process_info);
ModuleSP exe_module_sp;
ModuleSpec exe_module_spec(process_info.GetExecutableFile(), target->GetArchitecture());
FileSpecList executable_search_paths (Target::GetDefaultExecutableSearchPaths());
Error error = platform_sp->ResolveExecutable(exe_module_spec,
exe_module_sp,
executable_search_paths.GetSize() ? &executable_search_paths : NULL);
if (!error.Success())
return;
target->SetExecutableModule(exe_module_sp, true);
}
}
}
void
ProcessPOSIX::SendMessage(const ProcessMessage &message)
{
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS));
Mutex::Locker lock(m_message_mutex);
Mutex::Locker thread_lock(m_thread_list.GetMutex());
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.FindThreadByID(message.GetTID(), false).get());
switch (message.GetKind())
{
case ProcessMessage::eInvalidMessage:
return;
case ProcessMessage::eAttachMessage:
SetPrivateState(eStateStopped);
return;
case ProcessMessage::eLimboMessage:
assert(thread);
thread->SetState(eStateStopped);
if (message.GetTID() == GetID())
{
m_exit_status = message.GetExitStatus();
if (m_exit_now)
{
SetPrivateState(eStateExited);
m_monitor->Detach(GetID());
}
else
{
SetPrivateState(eStateStopped);
}
}
else
{
SetPrivateState(eStateStopped);
}
break;
case ProcessMessage::eExitMessage:
if (thread != nullptr)
thread->SetState(eStateExited);
else
{
if (log)
log->Warning ("ProcessPOSIX::%s eExitMessage for TID %" PRIu64 " failed to find a thread to mark as eStateExited, ignoring", __FUNCTION__, message.GetTID ());
}
// FIXME: I'm not sure we need to do this.
if (message.GetTID() == GetID())
{
SetExitStatus(message.GetExitStatus(), NULL);
}
else if (!IsAThreadRunning())
SetPrivateState(eStateStopped);
break;
case ProcessMessage::eSignalMessage:
case ProcessMessage::eSignalDeliveredMessage:
if (message.GetSignal() == SIGSTOP &&
AddThreadForInitialStopIfNeeded(message.GetTID()))
return;
// Intentional fall-through
case ProcessMessage::eBreakpointMessage:
case ProcessMessage::eTraceMessage:
case ProcessMessage::eWatchpointMessage:
case ProcessMessage::eCrashMessage:
assert(thread);
thread->SetState(eStateStopped);
SetPrivateState(eStateStopped);
break;
case ProcessMessage::eNewThreadMessage:
{
lldb::tid_t new_tid = message.GetChildTID();
if (WaitingForInitialStop(new_tid))
{
m_monitor->WaitForInitialTIDStop(new_tid);
}
assert(thread);
thread->SetState(eStateStopped);
SetPrivateState(eStateStopped);
break;
}
case ProcessMessage::eExecMessage:
{
assert(thread);
thread->SetState(eStateStopped);
SetPrivateState(eStateStopped);
break;
}
}
m_message_queue.push(message);
}
bool
ProcessPOSIX::AddThreadForInitialStopIfNeeded(lldb::tid_t stop_tid)
{
bool added_to_set = false;
ThreadStopSet::iterator it = m_seen_initial_stop.find(stop_tid);
if (it == m_seen_initial_stop.end())
{
m_seen_initial_stop.insert(stop_tid);
added_to_set = true;
}
return added_to_set;
}
bool
ProcessPOSIX::WaitingForInitialStop(lldb::tid_t stop_tid)
{
return (m_seen_initial_stop.find(stop_tid) == m_seen_initial_stop.end());
}
POSIXThread *
ProcessPOSIX::CreateNewPOSIXThread(lldb_private::Process &process, lldb::tid_t tid)
{
return new POSIXThread(process, tid);
}
void
ProcessPOSIX::RefreshStateAfterStop()
{
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_PROCESS));
if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
log->Printf ("ProcessPOSIX::%s(), message_queue size = %d", __FUNCTION__, (int)m_message_queue.size());
Mutex::Locker lock(m_message_mutex);
// This method used to only handle one message. Changing it to loop allows
// it to handle the case where we hit a breakpoint while handling a different
// breakpoint.
while (!m_message_queue.empty())
{
ProcessMessage &message = m_message_queue.front();
// Resolve the thread this message corresponds to and pass it along.
lldb::tid_t tid = message.GetTID();
if (log)
log->Printf ("ProcessPOSIX::%s(), message_queue size = %d, pid = %" PRIi64, __FUNCTION__, (int)m_message_queue.size(), tid);
if (message.GetKind() == ProcessMessage::eNewThreadMessage)
{
if (log)
log->Printf ("ProcessPOSIX::%s() adding thread, tid = %" PRIi64, __FUNCTION__, message.GetChildTID());
lldb::tid_t child_tid = message.GetChildTID();
ThreadSP thread_sp;
thread_sp.reset(CreateNewPOSIXThread(*this, child_tid));
Mutex::Locker lock(m_thread_list.GetMutex());
m_thread_list.AddThread(thread_sp);
}
m_thread_list.RefreshStateAfterStop();
POSIXThread *thread = static_cast<POSIXThread*>(
GetThreadList().FindThreadByID(tid, false).get());
if (thread)
thread->Notify(message);
if (message.GetKind() == ProcessMessage::eExitMessage)
{
// FIXME: We should tell the user about this, but the limbo message is probably better for that.
if (log)
log->Printf ("ProcessPOSIX::%s() removing thread, tid = %" PRIi64, __FUNCTION__, tid);
Mutex::Locker lock(m_thread_list.GetMutex());
ThreadSP thread_sp = m_thread_list.RemoveThreadByID(tid, false);
thread_sp.reset();
m_seen_initial_stop.erase(tid);
}
m_message_queue.pop();
}
}
bool
ProcessPOSIX::IsAlive()
{
StateType state = GetPrivateState();
return state != eStateDetached
&& state != eStateExited
&& state != eStateInvalid
&& state != eStateUnloaded;
}
size_t
ProcessPOSIX::DoReadMemory(addr_t vm_addr,
void *buf, size_t size, Error &error)
{
assert(m_monitor);
return m_monitor->ReadMemory(vm_addr, buf, size, error);
}
size_t
ProcessPOSIX::DoWriteMemory(addr_t vm_addr, const void *buf, size_t size,
Error &error)
{
assert(m_monitor);
return m_monitor->WriteMemory(vm_addr, buf, size, error);
}
addr_t
ProcessPOSIX::DoAllocateMemory(size_t size, uint32_t permissions,
Error &error)
{
addr_t allocated_addr = LLDB_INVALID_ADDRESS;
unsigned prot = 0;
if (permissions & lldb::ePermissionsReadable)
prot |= eMmapProtRead;
if (permissions & lldb::ePermissionsWritable)
prot |= eMmapProtWrite;
if (permissions & lldb::ePermissionsExecutable)
prot |= eMmapProtExec;
if (InferiorCallMmap(this, allocated_addr, 0, size, prot,
eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) {
m_addr_to_mmap_size[allocated_addr] = size;
error.Clear();
} else {
allocated_addr = LLDB_INVALID_ADDRESS;
error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions));
}
return allocated_addr;
}
Error
ProcessPOSIX::DoDeallocateMemory(lldb::addr_t addr)
{
Error error;
MMapMap::iterator pos = m_addr_to_mmap_size.find(addr);
if (pos != m_addr_to_mmap_size.end() &&
InferiorCallMunmap(this, addr, pos->second))
m_addr_to_mmap_size.erase (pos);
else
error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr);
return error;
}
size_t
ProcessPOSIX::GetSoftwareBreakpointTrapOpcode(BreakpointSite* bp_site)
{
static const uint8_t g_aarch64_opcode[] = { 0x00, 0x00, 0x20, 0xD4 };
static const uint8_t g_i386_opcode[] = { 0xCC };
ArchSpec arch = GetTarget().GetArchitecture();
const uint8_t *opcode = NULL;
size_t opcode_size = 0;
switch (arch.GetMachine())
{
default:
assert(false && "CPU type not supported!");
break;
case llvm::Triple::arm:
{
// The ARM reference recommends the use of 0xe7fddefe and 0xdefe
// but the linux kernel does otherwise.
static const uint8_t g_arm_breakpoint_opcode[] = { 0xf0, 0x01, 0xf0, 0xe7 };
static const uint8_t g_thumb_breakpoint_opcode[] = { 0x01, 0xde };
lldb::BreakpointLocationSP bp_loc_sp (bp_site->GetOwnerAtIndex (0));
AddressClass addr_class = eAddressClassUnknown;
if (bp_loc_sp)
addr_class = bp_loc_sp->GetAddress ().GetAddressClass ();
if (addr_class == eAddressClassCodeAlternateISA
|| (addr_class == eAddressClassUnknown
&& bp_loc_sp->GetAddress().GetOffset() & 1))
{
opcode = g_thumb_breakpoint_opcode;
opcode_size = sizeof(g_thumb_breakpoint_opcode);
}
else
{
opcode = g_arm_breakpoint_opcode;
opcode_size = sizeof(g_arm_breakpoint_opcode);
}
}
break;
case llvm::Triple::aarch64:
opcode = g_aarch64_opcode;
opcode_size = sizeof(g_aarch64_opcode);
break;
case llvm::Triple::x86:
case llvm::Triple::x86_64:
opcode = g_i386_opcode;
opcode_size = sizeof(g_i386_opcode);
break;
}
bp_site->SetTrapOpcode(opcode, opcode_size);
return opcode_size;
}
Error
ProcessPOSIX::EnableBreakpointSite(BreakpointSite *bp_site)
{
return EnableSoftwareBreakpoint(bp_site);
}
Error
ProcessPOSIX::DisableBreakpointSite(BreakpointSite *bp_site)
{
return DisableSoftwareBreakpoint(bp_site);
}
Error
ProcessPOSIX::EnableWatchpoint(Watchpoint *wp, bool notify)
{
Error error;
if (wp)
{
user_id_t watchID = wp->GetID();
addr_t addr = wp->GetLoadAddress();
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS));
if (log)
log->Printf ("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64 ")",
watchID);
if (wp->IsEnabled())
{
if (log)
log->Printf("ProcessPOSIX::EnableWatchpoint(watchID = %" PRIu64
") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.",
watchID, (uint64_t)addr);
return error;
}
// Try to find a vacant watchpoint slot in the inferiors' main thread
uint32_t wp_hw_index = LLDB_INVALID_INDEX32;
Mutex::Locker lock(m_thread_list.GetMutex());
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(0, false).get());
if (thread)
wp_hw_index = thread->FindVacantWatchpointIndex();
if (wp_hw_index == LLDB_INVALID_INDEX32)
{
error.SetErrorString("Setting hardware watchpoint failed.");
}
else
{
wp->SetHardwareIndex(wp_hw_index);
bool wp_enabled = true;
uint32_t thread_count = m_thread_list.GetSize(false);
for (uint32_t i = 0; i < thread_count; ++i)
{
thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(i, false).get());
if (thread)
wp_enabled &= thread->EnableHardwareWatchpoint(wp);
else
wp_enabled = false;
}
if (wp_enabled)
{
wp->SetEnabled(true, notify);
return error;
}
else
{
// Watchpoint enabling failed on at least one
// of the threads so roll back all of them
DisableWatchpoint(wp, false);
error.SetErrorString("Setting hardware watchpoint failed");
}
}
}
else
error.SetErrorString("Watchpoint argument was NULL.");
return error;
}
Error
ProcessPOSIX::DisableWatchpoint(Watchpoint *wp, bool notify)
{
Error error;
if (wp)
{
user_id_t watchID = wp->GetID();
addr_t addr = wp->GetLoadAddress();
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet(POSIX_LOG_WATCHPOINTS));
if (log)
log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64 ")",
watchID);
if (!wp->IsEnabled())
{
if (log)
log->Printf("ProcessPOSIX::DisableWatchpoint(watchID = %" PRIu64
") addr = 0x%8.8" PRIx64 ": watchpoint already disabled.",
watchID, (uint64_t)addr);
// This is needed (for now) to keep watchpoints disabled correctly
wp->SetEnabled(false, notify);
return error;
}
if (wp->IsHardware())
{
bool wp_disabled = true;
Mutex::Locker lock(m_thread_list.GetMutex());
uint32_t thread_count = m_thread_list.GetSize(false);
for (uint32_t i = 0; i < thread_count; ++i)
{
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(i, false).get());
if (thread)
wp_disabled &= thread->DisableHardwareWatchpoint(wp);
else
wp_disabled = false;
}
if (wp_disabled)
{
wp->SetHardwareIndex(LLDB_INVALID_INDEX32);
wp->SetEnabled(false, notify);
return error;
}
else
error.SetErrorString("Disabling hardware watchpoint failed");
}
}
else
error.SetErrorString("Watchpoint argument was NULL.");
return error;
}
Error
ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num)
{
Error error;
Mutex::Locker lock(m_thread_list.GetMutex());
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(0, false).get());
if (thread)
num = thread->NumSupportedHardwareWatchpoints();
else
error.SetErrorString("Process does not exist.");
return error;
}
Error
ProcessPOSIX::GetWatchpointSupportInfo(uint32_t &num, bool &after)
{
Error error = GetWatchpointSupportInfo(num);
// Watchpoints trigger and halt the inferior after
// the corresponding instruction has been executed.
after = true;
return error;
}
uint32_t
ProcessPOSIX::UpdateThreadListIfNeeded()
{
Mutex::Locker lock(m_thread_list.GetMutex());
// Do not allow recursive updates.
return m_thread_list.GetSize(false);
}
bool
ProcessPOSIX::UpdateThreadList(ThreadList &old_thread_list, ThreadList &new_thread_list)
{
Log *log (ProcessPOSIXLog::GetLogIfAllCategoriesSet (POSIX_LOG_THREAD));
if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
log->Printf ("ProcessPOSIX::%s() (pid = %" PRIi64 ")", __FUNCTION__, GetID());
bool has_updated = false;
// Update the process thread list with this new thread.
// FIXME: We should be using tid, not pid.
assert(m_monitor);
ThreadSP thread_sp (old_thread_list.FindThreadByID (GetID(), false));
if (!thread_sp) {
thread_sp.reset(CreateNewPOSIXThread(*this, GetID()));
has_updated = true;
}
if (log && log->GetMask().Test(POSIX_LOG_VERBOSE))
log->Printf ("ProcessPOSIX::%s() updated pid = %" PRIi64, __FUNCTION__, GetID());
new_thread_list.AddThread(thread_sp);
return has_updated; // the list has been updated
}
ByteOrder
ProcessPOSIX::GetByteOrder() const
{
// FIXME: We should be able to extract this value directly. See comment in
// ProcessPOSIX().
return m_byte_order;
}
size_t
ProcessPOSIX::PutSTDIN(const char *buf, size_t len, Error &error)
{
ssize_t status;
if ((status = write(m_monitor->GetTerminalFD(), buf, len)) < 0)
{
error.SetErrorToErrno();
return 0;
}
return status;
}
//------------------------------------------------------------------------------
// Utility functions.
bool
ProcessPOSIX::HasExited()
{
switch (GetPrivateState())
{
default:
break;
case eStateDetached:
case eStateExited:
return true;
}
return false;
}
bool
ProcessPOSIX::IsStopped()
{
switch (GetPrivateState())
{
default:
break;
case eStateStopped:
case eStateCrashed:
case eStateSuspended:
return true;
}
return false;
}
bool
ProcessPOSIX::IsAThreadRunning()
{
bool is_running = false;
Mutex::Locker lock(m_thread_list.GetMutex());
uint32_t thread_count = m_thread_list.GetSize(false);
for (uint32_t i = 0; i < thread_count; ++i)
{
POSIXThread *thread = static_cast<POSIXThread*>(
m_thread_list.GetThreadAtIndex(i, false).get());
StateType thread_state = thread->GetState();
if (thread_state == eStateRunning || thread_state == eStateStepping)
{
is_running = true;
break;
}
}
return is_running;
}
const DataBufferSP
ProcessPOSIX::GetAuxvData ()
{
// If we're the local platform, we can ask the host for auxv data.
PlatformSP platform_sp = m_target.GetPlatform ();
if (platform_sp && platform_sp->IsHost ())
return lldb_private::Host::GetAuxvData(this);
// Somewhat unexpected - the process is not running locally or we don't have a platform.
assert (false && "no platform or not the host - how did we get here with ProcessPOSIX?");
return DataBufferSP ();
}
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