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//===-- 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 <unordered_set>
// Other libraries and framework includes
#include "lldb/Core/ArchSpec.h"
#include "lldb/Host/Debug.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/HostThread.h"
#include "lldb/Target/MemoryRegionInfo.h"
#include "lldb/lldb-types.h"
#include "NativeThreadLinux.h"
#include "lldb/Host/common/NativeProcessProtocol.h"
namespace lldb_private {
class Error;
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 {
friend Error NativeProcessProtocol::Launch(
ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
MainLoop &mainloop, NativeProcessProtocolSP &process_sp);
friend Error NativeProcessProtocol::Attach(
lldb::pid_t pid, NativeProcessProtocol::NativeDelegate &native_delegate,
MainLoop &mainloop, NativeProcessProtocolSP &process_sp);
public:
// ---------------------------------------------------------------------
// 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;
void DoStopIDBumped(uint32_t newBumpId) override;
Error GetLoadedModuleFileSpec(const char *module_path,
FileSpec &file_spec) override;
Error GetFileLoadAddress(const llvm::StringRef &file_name,
lldb::addr_t &load_addr) override;
NativeThreadLinuxSP GetThreadByID(lldb::tid_t id);
// ---------------------------------------------------------------------
// Interface used by NativeRegisterContext-derived classes.
// ---------------------------------------------------------------------
static Error PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr,
void *data = nullptr, size_t data_size = 0,
long *result = nullptr);
bool SupportHardwareSingleStepping() const;
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:
MainLoop::SignalHandleUP m_sigchld_handle;
ArchSpec m_arch;
LazyBool m_supports_mem_region;
std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
lldb::tid_t m_pending_notification_tid;
// 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;
// ---------------------------------------------------------------------
// Private Instance Methods
// ---------------------------------------------------------------------
NativeProcessLinux();
Error LaunchInferior(MainLoop &mainloop, ProcessLaunchInfo &launch_info);
/// Attaches to an existing process. Forms the
/// implementation of Process::DoAttach
void AttachToInferior(MainLoop &mainloop, lldb::pid_t pid, Error &error);
::pid_t Attach(lldb::pid_t pid, Error &error);
static Error SetDefaultPtraceOpts(const lldb::pid_t);
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, NativeThreadLinux &thread);
void MonitorTrace(NativeThreadLinux &thread);
void MonitorBreakpoint(NativeThreadLinux &thread);
void MonitorWatchpoint(NativeThreadLinux &thread, uint32_t wp_index);
void MonitorSignal(const siginfo_t &info, NativeThreadLinux &thread,
bool exited);
Error SetupSoftwareSingleStepping(NativeThreadLinux &thread);
#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);
bool StopTrackingThread(lldb::tid_t thread_id);
NativeThreadLinuxSP AddThread(lldb::tid_t thread_id);
Error GetSoftwareBreakpointPCOffset(uint32_t &actual_opcode_size);
Error FixupBreakpointPCAsNeeded(NativeThreadLinux &thread);
/// 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);
void NotifyThreadDeath(lldb::tid_t tid);
Error Detach(lldb::tid_t tid);
// 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);
// Notify the delegate if all threads have stopped.
void SignalIfAllThreadsStopped();
// Resume the given thread, optionally passing it the given signal. The type
// of resume
// operation (continue, single-step) depends on the state parameter.
Error ResumeThread(NativeThreadLinux &thread, lldb::StateType state,
int signo);
void ThreadWasCreated(NativeThreadLinux &thread);
void SigchldHandler();
Error PopulateMemoryRegionCache();
};
} // namespace process_linux
} // namespace lldb_private
#endif // #ifndef liblldb_NativeProcessLinux_H_
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