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261 lines
9.0 KiB
261 lines
9.0 KiB
//===-- NativeProcessLinux.h ---------------------------------- -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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#include <csignal>
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#include <unordered_set>
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#include "lldb/Host/Debug.h"
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#include "lldb/Host/HostThread.h"
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#include "lldb/Host/linux/Support.h"
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#include "lldb/Target/MemoryRegionInfo.h"
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#include "lldb/Utility/ArchSpec.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/lldb-types.h"
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#include "NativeThreadLinux.h"
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#include "Plugins/Process/POSIX/NativeProcessELF.h"
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#include "ProcessorTrace.h"
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namespace lldb_private {
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class Status;
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class Scalar;
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namespace process_linux {
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/// \class NativeProcessLinux
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/// 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
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/// for debugging.
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///
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/// Changes in the inferior process state are broadcasted.
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class NativeProcessLinux : public NativeProcessELF {
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public:
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class Factory : public NativeProcessProtocol::Factory {
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public:
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llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
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Launch(ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
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MainLoop &mainloop) const override;
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llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
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Attach(lldb::pid_t pid, NativeDelegate &native_delegate,
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MainLoop &mainloop) const override;
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};
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// NativeProcessProtocol Interface
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Status Resume(const ResumeActionList &resume_actions) override;
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Status Halt() override;
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Status Detach() override;
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Status Signal(int signo) override;
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Status Interrupt() override;
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Status Kill() override;
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Status GetMemoryRegionInfo(lldb::addr_t load_addr,
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MemoryRegionInfo &range_info) override;
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Status ReadMemory(lldb::addr_t addr, void *buf, size_t size,
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size_t &bytes_read) override;
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Status WriteMemory(lldb::addr_t addr, const void *buf, size_t size,
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size_t &bytes_written) override;
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llvm::Expected<lldb::addr_t> AllocateMemory(size_t size,
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uint32_t permissions) override;
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llvm::Error DeallocateMemory(lldb::addr_t addr) override;
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size_t UpdateThreads() override;
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const ArchSpec &GetArchitecture() const override { return m_arch; }
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Status SetBreakpoint(lldb::addr_t addr, uint32_t size,
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bool hardware) override;
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Status RemoveBreakpoint(lldb::addr_t addr, bool hardware = false) override;
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void DoStopIDBumped(uint32_t newBumpId) override;
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Status GetLoadedModuleFileSpec(const char *module_path,
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FileSpec &file_spec) override;
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Status GetFileLoadAddress(const llvm::StringRef &file_name,
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lldb::addr_t &load_addr) override;
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NativeThreadLinux *GetThreadByID(lldb::tid_t id);
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NativeThreadLinux *GetCurrentThread();
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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GetAuxvData() const override {
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return getProcFile(GetID(), "auxv");
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}
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lldb::user_id_t StartTrace(const TraceOptions &config,
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Status &error) override;
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Status StopTrace(lldb::user_id_t traceid,
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lldb::tid_t thread) override;
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Status GetData(lldb::user_id_t traceid, lldb::tid_t thread,
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llvm::MutableArrayRef<uint8_t> &buffer,
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size_t offset = 0) override;
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Status GetMetaData(lldb::user_id_t traceid, lldb::tid_t thread,
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llvm::MutableArrayRef<uint8_t> &buffer,
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size_t offset = 0) override;
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Status GetTraceConfig(lldb::user_id_t traceid, TraceOptions &config) override;
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virtual llvm::Expected<TraceTypeInfo> GetSupportedTraceType() override;
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// Interface used by NativeRegisterContext-derived classes.
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static Status PtraceWrapper(int req, lldb::pid_t pid, void *addr = nullptr,
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void *data = nullptr, size_t data_size = 0,
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long *result = nullptr);
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bool SupportHardwareSingleStepping() const;
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protected:
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llvm::Expected<llvm::ArrayRef<uint8_t>>
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GetSoftwareBreakpointTrapOpcode(size_t size_hint) override;
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llvm::Expected<uint64_t> Syscall(llvm::ArrayRef<uint64_t> args);
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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 = eLazyBoolCalculate;
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std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
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lldb::tid_t m_pending_notification_tid = LLDB_INVALID_THREAD_ID;
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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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/// Inferior memory (allocated by us) and its size.
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llvm::DenseMap<lldb::addr_t, lldb::addr_t> m_allocated_memory;
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// Private Instance Methods
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NativeProcessLinux(::pid_t pid, int terminal_fd, NativeDelegate &delegate,
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const ArchSpec &arch, MainLoop &mainloop,
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llvm::ArrayRef<::pid_t> tids);
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// Returns a list of process threads that we have attached to.
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static llvm::Expected<std::vector<::pid_t>> Attach(::pid_t pid);
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static Status SetDefaultPtraceOpts(const lldb::pid_t);
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void MonitorCallback(lldb::pid_t pid, bool exited, WaitStatus status);
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void WaitForNewThread(::pid_t tid);
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void MonitorSIGTRAP(const siginfo_t &info, NativeThreadLinux &thread);
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void MonitorTrace(NativeThreadLinux &thread);
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void MonitorBreakpoint(NativeThreadLinux &thread);
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void MonitorWatchpoint(NativeThreadLinux &thread, uint32_t wp_index);
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void MonitorSignal(const siginfo_t &info, NativeThreadLinux &thread,
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bool exited);
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Status SetupSoftwareSingleStepping(NativeThreadLinux &thread);
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bool HasThreadNoLock(lldb::tid_t thread_id);
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bool StopTrackingThread(lldb::tid_t thread_id);
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NativeThreadLinux &AddThread(lldb::tid_t thread_id);
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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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Status 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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Status GetEventMessage(lldb::tid_t tid, unsigned long *message);
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void NotifyThreadDeath(lldb::tid_t tid);
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Status Detach(lldb::tid_t tid);
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// This method is requests a stop on all threads which are still running. It
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// sets up a
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// deferred delegate notification, which will fire once threads report as
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// stopped. The
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// triggerring_tid will be set as the current thread (main stop reason).
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void 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
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// of resume
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// operation (continue, single-step) depends on the state parameter.
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Status ResumeThread(NativeThreadLinux &thread, lldb::StateType state,
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int signo);
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void ThreadWasCreated(NativeThreadLinux &thread);
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void SigchldHandler();
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Status PopulateMemoryRegionCache();
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lldb::user_id_t StartTraceGroup(const TraceOptions &config,
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Status &error);
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// This function is intended to be used to stop tracing
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// on a thread that exited.
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Status StopTracingForThread(lldb::tid_t thread);
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// The below function as the name suggests, looks up a ProcessorTrace
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// instance from the m_processor_trace_monitor map. In the case of
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// process tracing where the traceid passed would map to the complete
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// process, it is mandatory to provide a threadid to obtain a trace
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// instance (since ProcessorTrace is tied to a thread). In the other
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// scenario that an individual thread is being traced, just the traceid
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// is sufficient to obtain the actual ProcessorTrace instance.
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llvm::Expected<ProcessorTraceMonitor &>
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LookupProcessorTraceInstance(lldb::user_id_t traceid, lldb::tid_t thread);
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// Stops tracing on individual threads being traced. Not intended
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// to be used to stop tracing on complete process.
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Status StopProcessorTracingOnThread(lldb::user_id_t traceid,
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lldb::tid_t thread);
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// Intended to stop tracing on complete process.
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// Should not be used for stopping trace on
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// individual threads.
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void StopProcessorTracingOnProcess();
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llvm::DenseMap<lldb::tid_t, ProcessorTraceMonitorUP>
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m_processor_trace_monitor;
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// Set for tracking threads being traced under
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// same process user id.
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llvm::DenseSet<lldb::tid_t> m_pt_traced_thread_group;
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lldb::user_id_t m_pt_proces_trace_id = LLDB_INVALID_UID;
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TraceOptions m_pt_process_trace_config;
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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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