108c325d6e
Summary: NPL::Resume attempted to handle eStateStopped as a resume action. However: - GDBRemoteCommunicationServerLLGS (the only user of NPL) never sets this action - it could set this action in response to a vCont:t packet, but LLDB never produces this packet - gdb-remote protocol documentation says vCont:t packet is used only in non-stop mode, but LLDB does not support non-stop mode - even if LLDB supported non-stop mode, this implementation of eStateStopped does something different from what the spec says it should (according to spec, it should stop the specified thread, but this seems to want to stop all threads). Given the facts above, I believe we should remove this unused and untested code, as it probably doesn't even work and removing it makes the rest of the code noticably simpler. Reviewers: ovyalov, chaoren Subscribers: lldb-commits Differential Revision: http://reviews.llvm.org/D9657 llvm-svn: 237103
408 lines
13 KiB
C++
408 lines
13 KiB
C++
//===-- NativeProcessLinux.h ---------------------------------- -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef liblldb_NativeProcessLinux_H_
|
|
#define liblldb_NativeProcessLinux_H_
|
|
|
|
// C Includes
|
|
#include <semaphore.h>
|
|
#include <signal.h>
|
|
|
|
// C++ Includes
|
|
#include <mutex>
|
|
#include <unordered_map>
|
|
#include <unordered_set>
|
|
|
|
// Other libraries and framework includes
|
|
#include "lldb/Core/ArchSpec.h"
|
|
#include "lldb/lldb-types.h"
|
|
#include "lldb/Host/Debug.h"
|
|
#include "lldb/Host/HostThread.h"
|
|
#include "lldb/Host/Mutex.h"
|
|
#include "lldb/Target/MemoryRegionInfo.h"
|
|
|
|
#include "lldb/Host/common/NativeProcessProtocol.h"
|
|
#include "NativeThreadLinux.h"
|
|
|
|
namespace lldb_private {
|
|
class Error;
|
|
class Module;
|
|
class Scalar;
|
|
|
|
namespace process_linux {
|
|
/// @class NativeProcessLinux
|
|
/// @brief Manages communication with the inferior (debugee) process.
|
|
///
|
|
/// Upon construction, this class prepares and launches an inferior process for
|
|
/// debugging.
|
|
///
|
|
/// Changes in the inferior process state are broadcasted.
|
|
class NativeProcessLinux: public NativeProcessProtocol
|
|
{
|
|
public:
|
|
|
|
static Error
|
|
LaunchProcess (
|
|
Module *exe_module,
|
|
ProcessLaunchInfo &launch_info,
|
|
NativeProcessProtocol::NativeDelegate &native_delegate,
|
|
NativeProcessProtocolSP &native_process_sp);
|
|
|
|
static Error
|
|
AttachToProcess (
|
|
lldb::pid_t pid,
|
|
NativeProcessProtocol::NativeDelegate &native_delegate,
|
|
NativeProcessProtocolSP &native_process_sp);
|
|
|
|
// ---------------------------------------------------------------------
|
|
// NativeProcessProtocol Interface
|
|
// ---------------------------------------------------------------------
|
|
Error
|
|
Resume (const ResumeActionList &resume_actions) override;
|
|
|
|
Error
|
|
Halt () override;
|
|
|
|
Error
|
|
Detach () override;
|
|
|
|
Error
|
|
Signal (int signo) override;
|
|
|
|
Error
|
|
Interrupt () override;
|
|
|
|
Error
|
|
Kill () override;
|
|
|
|
Error
|
|
GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info) override;
|
|
|
|
Error
|
|
ReadMemory(lldb::addr_t addr, void *buf, size_t size, size_t &bytes_read) override;
|
|
|
|
Error
|
|
ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf, size_t size, size_t &bytes_read) override;
|
|
|
|
Error
|
|
WriteMemory(lldb::addr_t addr, const void *buf, size_t size, size_t &bytes_written) override;
|
|
|
|
Error
|
|
AllocateMemory(size_t size, uint32_t permissions, lldb::addr_t &addr) override;
|
|
|
|
Error
|
|
DeallocateMemory (lldb::addr_t addr) override;
|
|
|
|
lldb::addr_t
|
|
GetSharedLibraryInfoAddress () override;
|
|
|
|
size_t
|
|
UpdateThreads () override;
|
|
|
|
bool
|
|
GetArchitecture (ArchSpec &arch) const override;
|
|
|
|
Error
|
|
SetBreakpoint (lldb::addr_t addr, uint32_t size, bool hardware) override;
|
|
|
|
Error
|
|
SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) override;
|
|
|
|
Error
|
|
RemoveWatchpoint (lldb::addr_t addr) override;
|
|
|
|
void
|
|
DoStopIDBumped (uint32_t newBumpId) override;
|
|
|
|
void
|
|
Terminate () override;
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Interface used by NativeRegisterContext-derived classes.
|
|
// ---------------------------------------------------------------------
|
|
|
|
/// Reads the contents from the register identified by the given (architecture
|
|
/// dependent) offset.
|
|
///
|
|
/// This method is provided for use by RegisterContextLinux derivatives.
|
|
Error
|
|
ReadRegisterValue(lldb::tid_t tid, unsigned offset, const char *reg_name,
|
|
unsigned size, RegisterValue &value);
|
|
|
|
/// Writes the given value to the register identified by the given
|
|
/// (architecture dependent) offset.
|
|
///
|
|
/// This method is provided for use by RegisterContextLinux derivatives.
|
|
Error
|
|
WriteRegisterValue(lldb::tid_t tid, unsigned offset, const char *reg_name,
|
|
const RegisterValue &value);
|
|
|
|
/// Reads all general purpose registers into the specified buffer.
|
|
Error
|
|
ReadGPR(lldb::tid_t tid, void *buf, size_t buf_size);
|
|
|
|
/// Reads generic floating point registers into the specified buffer.
|
|
Error
|
|
ReadFPR(lldb::tid_t tid, void *buf, size_t buf_size);
|
|
|
|
/// Reads the specified register set into the specified buffer.
|
|
/// For instance, the extended floating-point register set.
|
|
Error
|
|
ReadRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset);
|
|
|
|
/// Writes all general purpose registers into the specified buffer.
|
|
Error
|
|
WriteGPR(lldb::tid_t tid, void *buf, size_t buf_size);
|
|
|
|
/// Writes generic floating point registers into the specified buffer.
|
|
Error
|
|
WriteFPR(lldb::tid_t tid, void *buf, size_t buf_size);
|
|
|
|
/// Writes the specified register set into the specified buffer.
|
|
/// For instance, the extended floating-point register set.
|
|
Error
|
|
WriteRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset);
|
|
|
|
Error
|
|
GetLoadedModuleFileSpec(const char* module_path, FileSpec& file_spec) override;
|
|
|
|
protected:
|
|
// ---------------------------------------------------------------------
|
|
// NativeProcessProtocol protected interface
|
|
// ---------------------------------------------------------------------
|
|
Error
|
|
GetSoftwareBreakpointTrapOpcode (size_t trap_opcode_size_hint, size_t &actual_opcode_size, const uint8_t *&trap_opcode_bytes) override;
|
|
|
|
private:
|
|
|
|
class Monitor;
|
|
|
|
ArchSpec m_arch;
|
|
|
|
std::unique_ptr<Monitor> m_monitor_up;
|
|
|
|
LazyBool m_supports_mem_region;
|
|
std::vector<MemoryRegionInfo> m_mem_region_cache;
|
|
Mutex m_mem_region_cache_mutex;
|
|
|
|
// List of thread ids stepping with a breakpoint with the address of
|
|
// the relevan breakpoint
|
|
std::map<lldb::tid_t, lldb::addr_t> m_threads_stepping_with_breakpoint;
|
|
|
|
/// @class LauchArgs
|
|
///
|
|
/// @brief Simple structure to pass data to the thread responsible for
|
|
/// launching a child process.
|
|
struct LaunchArgs
|
|
{
|
|
LaunchArgs(Module *module,
|
|
char const **argv,
|
|
char const **envp,
|
|
const std::string &stdin_path,
|
|
const std::string &stdout_path,
|
|
const std::string &stderr_path,
|
|
const char *working_dir,
|
|
const ProcessLaunchInfo &launch_info);
|
|
|
|
~LaunchArgs();
|
|
|
|
Module *m_module; // The executable image to launch.
|
|
char const **m_argv; // Process arguments.
|
|
char const **m_envp; // Process environment.
|
|
const std::string &m_stdin_path; // Redirect stdin if not empty.
|
|
const std::string &m_stdout_path; // Redirect stdout if not empty.
|
|
const std::string &m_stderr_path; // Redirect stderr if not empty.
|
|
const char *m_working_dir; // Working directory or NULL.
|
|
const ProcessLaunchInfo &m_launch_info;
|
|
};
|
|
|
|
typedef std::function<::pid_t(Error &)> InitialOperation;
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Private Instance Methods
|
|
// ---------------------------------------------------------------------
|
|
NativeProcessLinux ();
|
|
|
|
/// Launches an inferior process ready for debugging. Forms the
|
|
/// implementation of Process::DoLaunch.
|
|
void
|
|
LaunchInferior (
|
|
Module *module,
|
|
char const *argv[],
|
|
char const *envp[],
|
|
const std::string &stdin_path,
|
|
const std::string &stdout_path,
|
|
const std::string &stderr_path,
|
|
const char *working_dir,
|
|
const ProcessLaunchInfo &launch_info,
|
|
Error &error);
|
|
|
|
/// Attaches to an existing process. Forms the
|
|
/// implementation of Process::DoAttach
|
|
void
|
|
AttachToInferior (lldb::pid_t pid, Error &error);
|
|
|
|
void
|
|
StartMonitorThread(const InitialOperation &operation, Error &error);
|
|
|
|
::pid_t
|
|
Launch(LaunchArgs *args, Error &error);
|
|
|
|
::pid_t
|
|
Attach(lldb::pid_t pid, Error &error);
|
|
|
|
static Error
|
|
SetDefaultPtraceOpts(const lldb::pid_t);
|
|
|
|
static bool
|
|
DupDescriptor(const char *path, int fd, int flags);
|
|
|
|
static void *
|
|
MonitorThread(void *baton);
|
|
|
|
void
|
|
MonitorCallback(lldb::pid_t pid, bool exited, int signal, int status);
|
|
|
|
void
|
|
WaitForNewThread(::pid_t tid);
|
|
|
|
void
|
|
MonitorSIGTRAP(const siginfo_t *info, lldb::pid_t pid);
|
|
|
|
void
|
|
MonitorTrace(lldb::pid_t pid, NativeThreadProtocolSP thread_sp);
|
|
|
|
void
|
|
MonitorBreakpoint(lldb::pid_t pid, NativeThreadProtocolSP thread_sp);
|
|
|
|
void
|
|
MonitorWatchpoint(lldb::pid_t pid, NativeThreadProtocolSP thread_sp, uint32_t wp_index);
|
|
|
|
void
|
|
MonitorSignal(const siginfo_t *info, lldb::pid_t pid, bool exited);
|
|
|
|
bool
|
|
SupportHardwareSingleStepping() const;
|
|
|
|
Error
|
|
SetupSoftwareSingleStepping(NativeThreadProtocolSP thread_sp);
|
|
|
|
#if 0
|
|
static ::ProcessMessage::CrashReason
|
|
GetCrashReasonForSIGSEGV(const siginfo_t *info);
|
|
|
|
static ::ProcessMessage::CrashReason
|
|
GetCrashReasonForSIGILL(const siginfo_t *info);
|
|
|
|
static ::ProcessMessage::CrashReason
|
|
GetCrashReasonForSIGFPE(const siginfo_t *info);
|
|
|
|
static ::ProcessMessage::CrashReason
|
|
GetCrashReasonForSIGBUS(const siginfo_t *info);
|
|
#endif
|
|
|
|
bool
|
|
HasThreadNoLock (lldb::tid_t thread_id);
|
|
|
|
NativeThreadProtocolSP
|
|
MaybeGetThreadNoLock (lldb::tid_t thread_id);
|
|
|
|
bool
|
|
StopTrackingThread (lldb::tid_t thread_id);
|
|
|
|
NativeThreadProtocolSP
|
|
AddThread (lldb::tid_t thread_id);
|
|
|
|
Error
|
|
GetSoftwareBreakpointPCOffset (NativeRegisterContextSP context_sp, uint32_t &actual_opcode_size);
|
|
|
|
Error
|
|
FixupBreakpointPCAsNeeded (NativeThreadProtocolSP &thread_sp);
|
|
|
|
/// Writes a siginfo_t structure corresponding to the given thread ID to the
|
|
/// memory region pointed to by @p siginfo.
|
|
Error
|
|
GetSignalInfo(lldb::tid_t tid, void *siginfo);
|
|
|
|
/// Writes the raw event message code (vis-a-vis PTRACE_GETEVENTMSG)
|
|
/// corresponding to the given thread ID to the memory pointed to by @p
|
|
/// message.
|
|
Error
|
|
GetEventMessage(lldb::tid_t tid, unsigned long *message);
|
|
|
|
/// Resumes the given thread. If @p signo is anything but
|
|
/// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
|
|
Error
|
|
Resume(lldb::tid_t tid, uint32_t signo);
|
|
|
|
/// Single steps the given thread. If @p signo is anything but
|
|
/// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
|
|
Error
|
|
SingleStep(lldb::tid_t tid, uint32_t signo);
|
|
|
|
void
|
|
NotifyThreadDeath (lldb::tid_t tid);
|
|
|
|
Error
|
|
Detach(lldb::tid_t tid);
|
|
|
|
|
|
// Typedefs.
|
|
typedef std::unordered_set<lldb::tid_t> ThreadIDSet;
|
|
|
|
// This method is requests a stop on all threads which are still running. It sets up a
|
|
// deferred delegate notification, which will fire once threads report as stopped. The
|
|
// triggerring_tid will be set as the current thread (main stop reason).
|
|
void
|
|
StopRunningThreads(lldb::tid_t triggering_tid);
|
|
|
|
struct PendingNotification
|
|
{
|
|
PendingNotification (lldb::tid_t triggering_tid):
|
|
triggering_tid (triggering_tid),
|
|
wait_for_stop_tids ()
|
|
{
|
|
}
|
|
|
|
const lldb::tid_t triggering_tid;
|
|
ThreadIDSet wait_for_stop_tids;
|
|
};
|
|
typedef std::unique_ptr<PendingNotification> PendingNotificationUP;
|
|
|
|
// Fire pending notification if no pending thread stops remain.
|
|
void SignalIfRequirementsSatisfied();
|
|
|
|
void
|
|
RequestStopOnAllRunningThreads();
|
|
|
|
Error
|
|
ThreadDidStop(lldb::tid_t tid, bool initiated_by_llgs);
|
|
|
|
// Resume the thread with the given thread id using the request_thread_resume_function
|
|
// called. If error_when_already_running is then then an error is raised if we think this
|
|
// thread is already running.
|
|
Error
|
|
ResumeThread(lldb::tid_t tid, NativeThreadLinux::ResumeThreadFunction request_thread_resume_function,
|
|
bool error_when_already_running);
|
|
|
|
void
|
|
DoStopThreads(PendingNotificationUP &¬ification_up);
|
|
|
|
void
|
|
ThreadWasCreated (lldb::tid_t tid);
|
|
|
|
// Member variables.
|
|
PendingNotificationUP m_pending_notification_up;
|
|
};
|
|
|
|
} // namespace process_linux
|
|
} // namespace lldb_private
|
|
|
|
#endif // #ifndef liblldb_NativeProcessLinux_H_
|