330 lines
11 KiB
C++
330 lines
11 KiB
C++
//===-- NativeProcessLinux.h ---------------------------------- -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef liblldb_NativeProcessLinux_H_
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#define liblldb_NativeProcessLinux_H_
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// C++ Includes
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#include <unordered_set>
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// Other libraries and framework includes
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/lldb-types.h"
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#include "lldb/Host/Debug.h"
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#include "lldb/Host/FileSpec.h"
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#include "lldb/Host/HostThread.h"
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#include "lldb/Host/Mutex.h"
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#include "lldb/Target/MemoryRegionInfo.h"
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#include "lldb/Host/common/NativeProcessProtocol.h"
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#include "NativeThreadLinux.h"
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namespace lldb_private {
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class Error;
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class Module;
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class Scalar;
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namespace process_linux {
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/// @class NativeProcessLinux
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/// @brief Manages communication with the inferior (debugee) process.
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///
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/// Upon construction, this class prepares and launches an inferior process for
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/// debugging.
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///
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/// Changes in the inferior process state are broadcasted.
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class NativeProcessLinux: public NativeProcessProtocol
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{
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friend Error
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NativeProcessProtocol::Launch (ProcessLaunchInfo &launch_info,
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NativeDelegate &native_delegate,
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MainLoop &mainloop,
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NativeProcessProtocolSP &process_sp);
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friend Error
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NativeProcessProtocol::Attach (lldb::pid_t pid,
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NativeProcessProtocol::NativeDelegate &native_delegate,
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MainLoop &mainloop,
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NativeProcessProtocolSP &process_sp);
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public:
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// ---------------------------------------------------------------------
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// NativeProcessProtocol Interface
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// ---------------------------------------------------------------------
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Error
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Resume (const ResumeActionList &resume_actions) override;
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Error
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Halt () override;
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Error
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Detach () override;
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Error
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Signal (int signo) override;
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Error
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Interrupt () override;
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Error
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Kill () override;
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Error
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GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo &range_info) override;
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Error
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ReadMemory(lldb::addr_t addr, void *buf, size_t size, size_t &bytes_read) override;
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Error
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ReadMemoryWithoutTrap(lldb::addr_t addr, void *buf, size_t size, size_t &bytes_read) override;
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Error
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WriteMemory(lldb::addr_t addr, const void *buf, size_t size, size_t &bytes_written) override;
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Error
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AllocateMemory(size_t size, uint32_t permissions, lldb::addr_t &addr) override;
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Error
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DeallocateMemory (lldb::addr_t addr) override;
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lldb::addr_t
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GetSharedLibraryInfoAddress () override;
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size_t
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UpdateThreads () override;
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bool
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GetArchitecture (ArchSpec &arch) const override;
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Error
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SetBreakpoint (lldb::addr_t addr, uint32_t size, bool hardware) override;
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void
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DoStopIDBumped (uint32_t newBumpId) override;
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Error
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GetLoadedModuleFileSpec(const char* module_path, FileSpec& file_spec) override;
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Error
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GetFileLoadAddress(const llvm::StringRef& file_name, lldb::addr_t& load_addr) override;
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NativeThreadLinuxSP
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GetThreadByID(lldb::tid_t id);
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// ---------------------------------------------------------------------
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// Interface used by NativeRegisterContext-derived classes.
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// ---------------------------------------------------------------------
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static Error
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PtraceWrapper(int req,
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lldb::pid_t pid,
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void *addr = nullptr,
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void *data = nullptr,
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size_t data_size = 0,
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long *result = nullptr);
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protected:
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// ---------------------------------------------------------------------
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// NativeProcessProtocol protected interface
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// ---------------------------------------------------------------------
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Error
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GetSoftwareBreakpointTrapOpcode (size_t trap_opcode_size_hint, size_t &actual_opcode_size, const uint8_t *&trap_opcode_bytes) override;
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private:
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MainLoop::SignalHandleUP m_sigchld_handle;
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ArchSpec m_arch;
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LazyBool m_supports_mem_region;
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std::vector<MemoryRegionInfo> m_mem_region_cache;
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Mutex m_mem_region_cache_mutex;
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lldb::tid_t m_pending_notification_tid;
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// List of thread ids stepping with a breakpoint with the address of
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// the relevan breakpoint
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std::map<lldb::tid_t, lldb::addr_t> m_threads_stepping_with_breakpoint;
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/// @class LauchArgs
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///
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/// @brief Simple structure to pass data to the thread responsible for
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/// launching a child process.
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struct LaunchArgs
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{
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LaunchArgs(Module *module,
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char const **argv,
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char const **envp,
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const FileSpec &stdin_file_spec,
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const FileSpec &stdout_file_spec,
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const FileSpec &stderr_file_spec,
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const FileSpec &working_dir,
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const ProcessLaunchInfo &launch_info);
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~LaunchArgs();
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Module *m_module; // The executable image to launch.
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char const **m_argv; // Process arguments.
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char const **m_envp; // Process environment.
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const FileSpec m_stdin_file_spec; // Redirect stdin if not empty.
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const FileSpec m_stdout_file_spec; // Redirect stdout if not empty.
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const FileSpec m_stderr_file_spec; // Redirect stderr if not empty.
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const FileSpec m_working_dir; // Working directory or empty.
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const ProcessLaunchInfo &m_launch_info;
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};
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typedef std::function< ::pid_t(Error &)> InitialOperation;
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// ---------------------------------------------------------------------
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// Private Instance Methods
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// ---------------------------------------------------------------------
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NativeProcessLinux ();
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/// Launches an inferior process ready for debugging. Forms the
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/// implementation of Process::DoLaunch.
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void
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LaunchInferior (
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MainLoop &mainloop,
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Module *module,
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char const *argv[],
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char const *envp[],
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const FileSpec &stdin_file_spec,
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const FileSpec &stdout_file_spec,
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const FileSpec &stderr_file_spec,
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const FileSpec &working_dir,
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const ProcessLaunchInfo &launch_info,
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Error &error);
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/// Attaches to an existing process. Forms the
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/// implementation of Process::DoAttach
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void
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AttachToInferior (MainLoop &mainloop, lldb::pid_t pid, Error &error);
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::pid_t
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Launch(LaunchArgs *args, Error &error);
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::pid_t
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Attach(lldb::pid_t pid, Error &error);
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static Error
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SetDefaultPtraceOpts(const lldb::pid_t);
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static bool
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DupDescriptor(const FileSpec &file_spec, int fd, int flags);
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static void *
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MonitorThread(void *baton);
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void
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MonitorCallback(lldb::pid_t pid, bool exited, int signal, int status);
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void
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WaitForNewThread(::pid_t tid);
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void
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MonitorSIGTRAP(const siginfo_t &info, NativeThreadLinux &thread);
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void
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MonitorTrace(NativeThreadLinux &thread);
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void
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MonitorBreakpoint(NativeThreadLinux &thread);
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void
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MonitorWatchpoint(NativeThreadLinux &thread, uint32_t wp_index);
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void
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MonitorSignal(const siginfo_t &info, NativeThreadLinux &thread, bool exited);
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bool
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SupportHardwareSingleStepping() const;
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Error
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SetupSoftwareSingleStepping(NativeThreadLinux &thread);
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#if 0
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static ::ProcessMessage::CrashReason
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GetCrashReasonForSIGSEGV(const siginfo_t *info);
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static ::ProcessMessage::CrashReason
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GetCrashReasonForSIGILL(const siginfo_t *info);
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static ::ProcessMessage::CrashReason
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GetCrashReasonForSIGFPE(const siginfo_t *info);
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static ::ProcessMessage::CrashReason
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GetCrashReasonForSIGBUS(const siginfo_t *info);
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#endif
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bool
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HasThreadNoLock (lldb::tid_t thread_id);
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bool
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StopTrackingThread (lldb::tid_t thread_id);
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NativeThreadLinuxSP
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AddThread (lldb::tid_t thread_id);
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Error
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GetSoftwareBreakpointPCOffset(uint32_t &actual_opcode_size);
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Error
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FixupBreakpointPCAsNeeded(NativeThreadLinux &thread);
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/// Writes a siginfo_t structure corresponding to the given thread ID to the
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/// memory region pointed to by @p siginfo.
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Error
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GetSignalInfo(lldb::tid_t tid, void *siginfo);
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/// Writes the raw event message code (vis-a-vis PTRACE_GETEVENTMSG)
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/// corresponding to the given thread ID to the memory pointed to by @p
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/// message.
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Error
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GetEventMessage(lldb::tid_t tid, unsigned long *message);
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/// Resumes the given thread. If @p signo is anything but
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/// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
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Error
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Resume(lldb::tid_t tid, uint32_t signo);
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/// Single steps the given thread. If @p signo is anything but
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/// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
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Error
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SingleStep(lldb::tid_t tid, uint32_t signo);
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void
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NotifyThreadDeath (lldb::tid_t tid);
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Error
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Detach(lldb::tid_t tid);
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// This method is requests a stop on all threads which are still running. It sets up a
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// deferred delegate notification, which will fire once threads report as stopped. The
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// triggerring_tid will be set as the current thread (main stop reason).
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void
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StopRunningThreads(lldb::tid_t triggering_tid);
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// Notify the delegate if all threads have stopped.
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void SignalIfAllThreadsStopped();
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// Resume the given thread, optionally passing it the given signal. The type of resume
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// operation (continue, single-step) depends on the state parameter.
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Error
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ResumeThread(NativeThreadLinux &thread, lldb::StateType state, int signo);
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void
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ThreadWasCreated(NativeThreadLinux &thread);
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void
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SigchldHandler();
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};
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} // namespace process_linux
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} // namespace lldb_private
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#endif // #ifndef liblldb_NativeProcessLinux_H_
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