You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
9.0 KiB
261 lines
9.0 KiB
4 months ago
|
//===-- NativeProcessLinux.h ---------------------------------- -*- C++ -*-===//
|
||
|
//
|
||
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===//
|
||
|
|
||
|
#ifndef liblldb_NativeProcessLinux_H_
|
||
|
#define liblldb_NativeProcessLinux_H_
|
||
|
|
||
|
#include <csignal>
|
||
|
#include <unordered_set>
|
||
|
|
||
|
#include "lldb/Host/Debug.h"
|
||
|
#include "lldb/Host/HostThread.h"
|
||
|
#include "lldb/Host/linux/Support.h"
|
||
|
#include "lldb/Target/MemoryRegionInfo.h"
|
||
|
#include "lldb/Utility/ArchSpec.h"
|
||
|
#include "lldb/Utility/FileSpec.h"
|
||
|
#include "lldb/lldb-types.h"
|
||
|
|
||
|
#include "NativeThreadLinux.h"
|
||
|
#include "Plugins/Process/POSIX/NativeProcessELF.h"
|
||
|
#include "ProcessorTrace.h"
|
||
|
|
||
|
namespace lldb_private {
|
||
|
class Status;
|
||
|
class Scalar;
|
||
|
|
||
|
namespace process_linux {
|
||
|
/// \class NativeProcessLinux
|
||
|
/// 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 NativeProcessELF {
|
||
|
public:
|
||
|
class Factory : public NativeProcessProtocol::Factory {
|
||
|
public:
|
||
|
llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
|
||
|
Launch(ProcessLaunchInfo &launch_info, NativeDelegate &native_delegate,
|
||
|
MainLoop &mainloop) const override;
|
||
|
|
||
|
llvm::Expected<std::unique_ptr<NativeProcessProtocol>>
|
||
|
Attach(lldb::pid_t pid, NativeDelegate &native_delegate,
|
||
|
MainLoop &mainloop) const override;
|
||
|
};
|
||
|
|
||
|
// NativeProcessProtocol Interface
|
||
|
Status Resume(const ResumeActionList &resume_actions) override;
|
||
|
|
||
|
Status Halt() override;
|
||
|
|
||
|
Status Detach() override;
|
||
|
|
||
|
Status Signal(int signo) override;
|
||
|
|
||
|
Status Interrupt() override;
|
||
|
|
||
|
Status Kill() override;
|
||
|
|
||
|
Status GetMemoryRegionInfo(lldb::addr_t load_addr,
|
||
|
MemoryRegionInfo &range_info) override;
|
||
|
|
||
|
Status ReadMemory(lldb::addr_t addr, void *buf, size_t size,
|
||
|
size_t &bytes_read) override;
|
||
|
|
||
|
Status WriteMemory(lldb::addr_t addr, const void *buf, size_t size,
|
||
|
size_t &bytes_written) override;
|
||
|
|
||
|
llvm::Expected<lldb::addr_t> AllocateMemory(size_t size,
|
||
|
uint32_t permissions) override;
|
||
|
|
||
|
llvm::Error DeallocateMemory(lldb::addr_t addr) override;
|
||
|
|
||
|
size_t UpdateThreads() override;
|
||
|
|
||
|
const ArchSpec &GetArchitecture() const override { return m_arch; }
|
||
|
|
||
|
Status SetBreakpoint(lldb::addr_t addr, uint32_t size,
|
||
|
bool hardware) override;
|
||
|
|
||
|
Status RemoveBreakpoint(lldb::addr_t addr, bool hardware = false) override;
|
||
|
|
||
|
void DoStopIDBumped(uint32_t newBumpId) override;
|
||
|
|
||
|
Status GetLoadedModuleFileSpec(const char *module_path,
|
||
|
FileSpec &file_spec) override;
|
||
|
|
||
|
Status GetFileLoadAddress(const llvm::StringRef &file_name,
|
||
|
lldb::addr_t &load_addr) override;
|
||
|
|
||
|
NativeThreadLinux *GetThreadByID(lldb::tid_t id);
|
||
|
NativeThreadLinux *GetCurrentThread();
|
||
|
|
||
|
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
|
||
|
GetAuxvData() const override {
|
||
|
return getProcFile(GetID(), "auxv");
|
||
|
}
|
||
|
|
||
|
lldb::user_id_t StartTrace(const TraceOptions &config,
|
||
|
Status &error) override;
|
||
|
|
||
|
Status StopTrace(lldb::user_id_t traceid,
|
||
|
lldb::tid_t thread) override;
|
||
|
|
||
|
Status GetData(lldb::user_id_t traceid, lldb::tid_t thread,
|
||
|
llvm::MutableArrayRef<uint8_t> &buffer,
|
||
|
size_t offset = 0) override;
|
||
|
|
||
|
Status GetMetaData(lldb::user_id_t traceid, lldb::tid_t thread,
|
||
|
llvm::MutableArrayRef<uint8_t> &buffer,
|
||
|
size_t offset = 0) override;
|
||
|
|
||
|
Status GetTraceConfig(lldb::user_id_t traceid, TraceOptions &config) override;
|
||
|
|
||
|
virtual llvm::Expected<TraceTypeInfo> GetSupportedTraceType() override;
|
||
|
|
||
|
// Interface used by NativeRegisterContext-derived classes.
|
||
|
static Status 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:
|
||
|
llvm::Expected<llvm::ArrayRef<uint8_t>>
|
||
|
GetSoftwareBreakpointTrapOpcode(size_t size_hint) override;
|
||
|
|
||
|
llvm::Expected<uint64_t> Syscall(llvm::ArrayRef<uint64_t> args);
|
||
|
|
||
|
private:
|
||
|
MainLoop::SignalHandleUP m_sigchld_handle;
|
||
|
ArchSpec m_arch;
|
||
|
|
||
|
LazyBool m_supports_mem_region = eLazyBoolCalculate;
|
||
|
std::vector<std::pair<MemoryRegionInfo, FileSpec>> m_mem_region_cache;
|
||
|
|
||
|
lldb::tid_t m_pending_notification_tid = LLDB_INVALID_THREAD_ID;
|
||
|
|
||
|
// 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;
|
||
|
|
||
|
/// Inferior memory (allocated by us) and its size.
|
||
|
llvm::DenseMap<lldb::addr_t, lldb::addr_t> m_allocated_memory;
|
||
|
|
||
|
// Private Instance Methods
|
||
|
NativeProcessLinux(::pid_t pid, int terminal_fd, NativeDelegate &delegate,
|
||
|
const ArchSpec &arch, MainLoop &mainloop,
|
||
|
llvm::ArrayRef<::pid_t> tids);
|
||
|
|
||
|
// Returns a list of process threads that we have attached to.
|
||
|
static llvm::Expected<std::vector<::pid_t>> Attach(::pid_t pid);
|
||
|
|
||
|
static Status SetDefaultPtraceOpts(const lldb::pid_t);
|
||
|
|
||
|
void MonitorCallback(lldb::pid_t pid, bool exited, WaitStatus 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);
|
||
|
|
||
|
Status SetupSoftwareSingleStepping(NativeThreadLinux &thread);
|
||
|
|
||
|
bool HasThreadNoLock(lldb::tid_t thread_id);
|
||
|
|
||
|
bool StopTrackingThread(lldb::tid_t thread_id);
|
||
|
|
||
|
NativeThreadLinux &AddThread(lldb::tid_t thread_id);
|
||
|
|
||
|
/// Writes a siginfo_t structure corresponding to the given thread ID to the
|
||
|
/// memory region pointed to by \p siginfo.
|
||
|
Status 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.
|
||
|
Status GetEventMessage(lldb::tid_t tid, unsigned long *message);
|
||
|
|
||
|
void NotifyThreadDeath(lldb::tid_t tid);
|
||
|
|
||
|
Status 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.
|
||
|
Status ResumeThread(NativeThreadLinux &thread, lldb::StateType state,
|
||
|
int signo);
|
||
|
|
||
|
void ThreadWasCreated(NativeThreadLinux &thread);
|
||
|
|
||
|
void SigchldHandler();
|
||
|
|
||
|
Status PopulateMemoryRegionCache();
|
||
|
|
||
|
lldb::user_id_t StartTraceGroup(const TraceOptions &config,
|
||
|
Status &error);
|
||
|
|
||
|
// This function is intended to be used to stop tracing
|
||
|
// on a thread that exited.
|
||
|
Status StopTracingForThread(lldb::tid_t thread);
|
||
|
|
||
|
// The below function as the name suggests, looks up a ProcessorTrace
|
||
|
// instance from the m_processor_trace_monitor map. In the case of
|
||
|
// process tracing where the traceid passed would map to the complete
|
||
|
// process, it is mandatory to provide a threadid to obtain a trace
|
||
|
// instance (since ProcessorTrace is tied to a thread). In the other
|
||
|
// scenario that an individual thread is being traced, just the traceid
|
||
|
// is sufficient to obtain the actual ProcessorTrace instance.
|
||
|
llvm::Expected<ProcessorTraceMonitor &>
|
||
|
LookupProcessorTraceInstance(lldb::user_id_t traceid, lldb::tid_t thread);
|
||
|
|
||
|
// Stops tracing on individual threads being traced. Not intended
|
||
|
// to be used to stop tracing on complete process.
|
||
|
Status StopProcessorTracingOnThread(lldb::user_id_t traceid,
|
||
|
lldb::tid_t thread);
|
||
|
|
||
|
// Intended to stop tracing on complete process.
|
||
|
// Should not be used for stopping trace on
|
||
|
// individual threads.
|
||
|
void StopProcessorTracingOnProcess();
|
||
|
|
||
|
llvm::DenseMap<lldb::tid_t, ProcessorTraceMonitorUP>
|
||
|
m_processor_trace_monitor;
|
||
|
|
||
|
// Set for tracking threads being traced under
|
||
|
// same process user id.
|
||
|
llvm::DenseSet<lldb::tid_t> m_pt_traced_thread_group;
|
||
|
|
||
|
lldb::user_id_t m_pt_proces_trace_id = LLDB_INVALID_UID;
|
||
|
TraceOptions m_pt_process_trace_config;
|
||
|
};
|
||
|
|
||
|
} // namespace process_linux
|
||
|
} // namespace lldb_private
|
||
|
|
||
|
#endif // #ifndef liblldb_NativeProcessLinux_H_
|