d8cf1a119d
325,000 breakpoints for running "breakpoint set --func-regex ." on lldb itself (after hitting a breakpoint at main so that LLDB.framework is loaded) used to take up to an hour to set, now we are down under a minute. With warm file caches, we are at 40 seconds, and that is with setting 325,000 breakpoint through the GDB remote API. Linux and the native debuggers might be faster. I haven't timed what how much is debug info parsing and how much is the protocol traffic to/from GDB remote. That there were many performance issues. Most of them were due to storing breakpoints in the wrong data structures, or using the wrong iterators to traverse the lists, traversing the lists in inefficient ways, and not optimizing certain function name lookups/symbol merges correctly. Debugging after that is also now very efficient. There were issues with replacing the breakpoint opcodes in memory that was read, and those routines were also fixed. llvm-svn: 183820
347 lines
15 KiB
C++
347 lines
15 KiB
C++
//===-- RNBRemote.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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//
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// Created by Greg Clayton on 12/12/07.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __RNBRemote_h__
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#define __RNBRemote_h__
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#include "RNBDefs.h"
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#include "DNB.h"
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#include "RNBContext.h"
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#include "RNBSocket.h"
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#include "PThreadMutex.h"
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#include <string>
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#include <vector>
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#include <deque>
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#include <map>
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class RNBSocket;
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class RNBContext;
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class PThreadEvents;
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enum event_loop_mode { debug_nub, gdb_remote_protocol, done };
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class RNBRemote
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{
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public:
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typedef enum {
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invalid_packet = 0,
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ack, // '+'
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nack, // '-'
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halt, // ^C (async halt)
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use_extended_mode, // '!'
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why_halted, // '?'
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set_argv, // 'A'
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set_bp, // 'B'
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cont, // 'c'
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continue_with_sig, // 'C'
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detach, // 'D'
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read_general_regs, // 'g'
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write_general_regs, // 'G'
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set_thread, // 'H'
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step_inferior_one_cycle, // 'i'
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signal_and_step_inf_one_cycle, // 'I'
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kill, // 'k'
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read_memory, // 'm'
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write_memory, // 'M'
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read_register, // 'p'
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write_register, // 'P'
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restart, // 'R'
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single_step, // 's'
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single_step_with_sig, // 'S'
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search_mem_backwards, // 't'
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thread_alive_p, // 'T'
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vattach, // 'vAttach;pid'
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vattachwait, // 'vAttachWait:XX...' where XX is one or more hex encoded process name ASCII bytes
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vattachorwait, // 'vAttachOrWait:XX...' where XX is one or more hex encoded process name ASCII bytes
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vattachname, // 'vAttachName:XX...' where XX is one or more hex encoded process name ASCII bytes
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vcont, // 'vCont'
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vcont_list_actions, // 'vCont?'
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write_data_to_memory, // 'X'
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insert_mem_bp, // 'Z0'
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remove_mem_bp, // 'z0'
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insert_hardware_bp, // 'Z1'
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remove_hardware_bp, // 'z1'
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insert_write_watch_bp, // 'Z2'
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remove_write_watch_bp, // 'z2'
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insert_read_watch_bp, // 'Z3'
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remove_read_watch_bp, // 'z3'
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insert_access_watch_bp, // 'Z4'
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remove_access_watch_bp, // 'z4'
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query_monitor, // 'qRcmd'
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query_current_thread_id, // 'qC'
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query_get_pid, // 'qGetPid'
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query_thread_ids_first, // 'qfThreadInfo'
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query_thread_ids_subsequent, // 'qsThreadInfo'
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query_thread_extra_info, // 'qThreadExtraInfo'
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query_thread_stop_info, // 'qThreadStopInfo'
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query_image_offsets, // 'qOffsets'
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query_symbol_lookup, // 'gSymbols'
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query_launch_success, // 'qLaunchSuccess'
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query_register_info, // 'qRegisterInfo'
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query_shlib_notify_info_addr, // 'qShlibInfoAddr'
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query_step_packet_supported, // 'qStepPacketSupported'
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query_vattachorwait_supported, // 'qVAttachOrWaitSupported'
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query_sync_thread_state_supported,// 'QSyncThreadState'
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query_host_info, // 'qHostInfo'
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query_process_info, // 'qProcessInfo'
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pass_signals_to_inferior, // 'QPassSignals'
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start_noack_mode, // 'QStartNoAckMode'
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prefix_reg_packets_with_tid, // 'QPrefixRegisterPacketsWithThreadID
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set_logging_mode, // 'QSetLogging:'
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set_max_packet_size, // 'QSetMaxPacketSize:'
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set_max_payload_size, // 'QSetMaxPayloadSize:'
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set_environment_variable, // 'QEnvironment:'
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set_environment_variable_hex, // 'QEnvironmentHexEncoded:'
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set_launch_arch, // 'QLaunchArch:'
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set_disable_aslr, // 'QSetDisableASLR:'
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set_stdin, // 'QSetSTDIN:'
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set_stdout, // 'QSetSTDOUT:'
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set_stderr, // 'QSetSTDERR:'
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set_working_dir, // 'QSetWorkingDir:'
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set_list_threads_in_stop_reply, // 'QListThreadsInStopReply:'
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sync_thread_state, // 'QSyncThreadState:'
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memory_region_info, // 'qMemoryRegionInfo:'
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get_profile_data, // 'qGetProfileData'
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set_enable_profiling, // 'QSetEnableAsyncProfiling'
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watchpoint_support_info, // 'qWatchpointSupportInfo:'
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allocate_memory, // '_M'
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deallocate_memory, // '_m'
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unknown_type
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} PacketEnum;
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typedef rnb_err_t (RNBRemote::*HandlePacketCallback)(const char *p);
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RNBRemote ();
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~RNBRemote ();
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void Initialize();
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bool InitializeRegisters (bool force = false);
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rnb_err_t HandleAsyncPacket(PacketEnum *type = NULL);
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rnb_err_t HandleReceivedPacket(PacketEnum *type = NULL);
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nub_thread_t GetContinueThread () const
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{
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return m_continue_thread;
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}
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void SetContinueThread (nub_thread_t tid)
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{
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m_continue_thread = tid;
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}
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nub_thread_t GetCurrentThread () const
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{
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if (m_thread == 0 || m_thread == -1)
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return DNBProcessGetCurrentThread (m_ctx.ProcessID());
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return m_thread;
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}
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void SetCurrentThread (nub_thread_t tid)
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{
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DNBProcessSetCurrentThread (m_ctx.ProcessID(), tid);
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m_thread = tid;
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}
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static void* ThreadFunctionReadRemoteData(void *arg);
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void StartReadRemoteDataThread ();
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void StopReadRemoteDataThread ();
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void NotifyThatProcessStopped (void);
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rnb_err_t HandlePacket_A (const char *p);
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rnb_err_t HandlePacket_H (const char *p);
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rnb_err_t HandlePacket_qC (const char *p);
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rnb_err_t HandlePacket_qRcmd (const char *p);
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rnb_err_t HandlePacket_qGetPid (const char *p);
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rnb_err_t HandlePacket_qLaunchSuccess (const char *p);
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rnb_err_t HandlePacket_qRegisterInfo (const char *p);
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rnb_err_t HandlePacket_qShlibInfoAddr (const char *p);
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rnb_err_t HandlePacket_qStepPacketSupported (const char *p);
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rnb_err_t HandlePacket_qVAttachOrWaitSupported (const char *p);
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rnb_err_t HandlePacket_qSyncThreadStateSupported (const char *p);
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rnb_err_t HandlePacket_qThreadInfo (const char *p);
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rnb_err_t HandlePacket_qThreadExtraInfo (const char *p);
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rnb_err_t HandlePacket_qThreadStopInfo (const char *p);
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rnb_err_t HandlePacket_qHostInfo (const char *p);
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rnb_err_t HandlePacket_qProcessInfo (const char *p);
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rnb_err_t HandlePacket_QStartNoAckMode (const char *p);
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rnb_err_t HandlePacket_QThreadSuffixSupported (const char *p);
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rnb_err_t HandlePacket_QSetLogging (const char *p);
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rnb_err_t HandlePacket_QSetDisableASLR (const char *p);
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rnb_err_t HandlePacket_QSetSTDIO (const char *p);
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rnb_err_t HandlePacket_QSetWorkingDir (const char *p);
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rnb_err_t HandlePacket_QSetMaxPayloadSize (const char *p);
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rnb_err_t HandlePacket_QSetMaxPacketSize (const char *p);
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rnb_err_t HandlePacket_QEnvironment (const char *p);
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rnb_err_t HandlePacket_QEnvironmentHexEncoded (const char *p);
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rnb_err_t HandlePacket_QLaunchArch (const char *p);
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rnb_err_t HandlePacket_QListThreadsInStopReply (const char *p);
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rnb_err_t HandlePacket_QSyncThreadState (const char *p);
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rnb_err_t HandlePacket_QPrefixRegisterPacketsWithThreadID (const char *p);
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rnb_err_t HandlePacket_last_signal (const char *p);
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rnb_err_t HandlePacket_m (const char *p);
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rnb_err_t HandlePacket_M (const char *p);
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rnb_err_t HandlePacket_X (const char *p);
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rnb_err_t HandlePacket_g (const char *p);
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rnb_err_t HandlePacket_G (const char *p);
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rnb_err_t HandlePacket_z (const char *p);
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rnb_err_t HandlePacket_T (const char *p);
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rnb_err_t HandlePacket_p (const char *p);
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rnb_err_t HandlePacket_P (const char *p);
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rnb_err_t HandlePacket_c (const char *p);
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rnb_err_t HandlePacket_C (const char *p);
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rnb_err_t HandlePacket_D (const char *p);
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rnb_err_t HandlePacket_k (const char *p);
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rnb_err_t HandlePacket_s (const char *p);
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rnb_err_t HandlePacket_S (const char *p);
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rnb_err_t HandlePacket_v (const char *p);
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rnb_err_t HandlePacket_UNIMPLEMENTED (const char *p);
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rnb_err_t HandlePacket_ILLFORMED (const char *file, int line, const char *p, const char *description);
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rnb_err_t HandlePacket_AllocateMemory (const char *p);
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rnb_err_t HandlePacket_DeallocateMemory (const char *p);
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rnb_err_t HandlePacket_MemoryRegionInfo (const char *p);
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rnb_err_t HandlePacket_GetProfileData(const char *p);
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rnb_err_t HandlePacket_SetEnableAsyncProfiling(const char *p);
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rnb_err_t HandlePacket_WatchpointSupportInfo (const char *p);
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rnb_err_t HandlePacket_stop_process (const char *p);
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rnb_err_t SendStopReplyPacketForThread (nub_thread_t tid);
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rnb_err_t SendHexEncodedBytePacket (const char *header, const void *buf, size_t buf_len, const char *footer);
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rnb_err_t SendSTDOUTPacket (char *buf, nub_size_t buf_size);
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rnb_err_t SendSTDERRPacket (char *buf, nub_size_t buf_size);
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void FlushSTDIO ();
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void SendAsyncProfileData ();
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rnb_err_t SendAsyncProfileDataPacket (char *buf, nub_size_t buf_size);
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RNBContext& Context() { return m_ctx; }
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RNBSocket& Comm() { return m_comm; }
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void
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SetUseNativeRegisters (bool b)
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{
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m_use_native_regs = b;
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}
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private:
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// Outlaw some contructors
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RNBRemote (const RNBRemote &);
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protected:
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rnb_err_t GetCommData ();
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void CommDataReceived(const std::string& data);
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struct Packet
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{
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typedef std::vector<Packet> collection;
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typedef collection::iterator iterator;
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typedef collection::const_iterator const_iterator;
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PacketEnum type;
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HandlePacketCallback normal; // Function to call when inferior is halted
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HandlePacketCallback async; // Function to call when inferior is running
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std::string abbrev;
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std::string printable_name;
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bool
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IsPlatformPacket () const
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{
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switch (type)
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{
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case set_logging_mode:
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case query_host_info:
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return true;
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default:
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break;
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}
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return false;
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}
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Packet() :
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type(invalid_packet),
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normal (NULL),
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async (NULL),
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abbrev (),
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printable_name ()
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{
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}
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Packet( PacketEnum in_type,
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HandlePacketCallback in_normal,
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HandlePacketCallback in_async,
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const char *in_abbrev,
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const char *in_printable_name) :
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type (in_type),
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normal (in_normal),
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async (in_async),
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abbrev (in_abbrev),
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printable_name (in_printable_name)
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{
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}
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};
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rnb_err_t GetPacket (std::string &packet_data, RNBRemote::Packet& packet_info, bool wait);
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rnb_err_t SendPacket (const std::string &);
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void CreatePacketTable ();
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rnb_err_t GetPacketPayload (std::string &);
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nub_thread_t
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ExtractThreadIDFromThreadSuffix (const char *p);
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RNBContext m_ctx; // process context
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RNBSocket m_comm; // communication port
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std::string m_arch;
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nub_thread_t m_continue_thread; // thread to continue; 0 for any, -1 for all
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nub_thread_t m_thread; // thread for other ops; 0 for any, -1 for all
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PThreadMutex m_mutex; // Mutex that protects
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uint32_t m_packets_recvd;
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Packet::collection m_packets;
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std::deque<std::string> m_rx_packets;
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std::string m_rx_partial_data; // For packets that may come in more than one batch, anything left over can be left here
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pthread_t m_rx_pthread;
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uint32_t m_max_payload_size; // the maximum sized payload we should send to gdb
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bool m_extended_mode; // are we in extended mode?
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bool m_noack_mode; // are we in no-ack mode?
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bool m_use_native_regs; // Use native registers by querying DNB layer for register definitions?
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bool m_thread_suffix_supported; // Set to true if the 'p', 'P', 'g', and 'G' packets should be prefixed with the thread ID and colon:
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// "$pRR;thread:TTTT;" instead of "$pRR"
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// "$PRR=VVVVVVVV;thread:TTTT;" instead of "$PRR=VVVVVVVV"
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// "$g;thread:TTTT" instead of "$g"
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// "$GVVVVVVVVVVVVVV;thread:TTTT;#00 instead of "$GVVVVVVVVVVVVVV"
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bool m_list_threads_in_stop_reply;
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};
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/* We translate the /usr/include/mach/exception_types.h exception types
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(e.g. EXC_BAD_ACCESS) to the fake BSD signal numbers that gdb uses
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in include/gdb/signals.h (e.g. TARGET_EXC_BAD_ACCESS). These hard
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coded values for TARGET_EXC_BAD_ACCESS et al must match the gdb
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values in its include/gdb/signals.h. */
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#define TARGET_EXC_BAD_ACCESS 0x91
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#define TARGET_EXC_BAD_INSTRUCTION 0x92
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#define TARGET_EXC_ARITHMETIC 0x93
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#define TARGET_EXC_EMULATION 0x94
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#define TARGET_EXC_SOFTWARE 0x95
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#define TARGET_EXC_BREAKPOINT 0x96
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/* Generally speaking, you can't assume gdb can receive more than 399 bytes
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at a time with a random gdb. This bufsize constant is only specifying
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how many bytes gdb can *receive* from debugserver -- it tells us nothing
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about how many bytes gdb might try to send in a single packet. */
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#define DEFAULT_GDB_REMOTE_PROTOCOL_BUFSIZE 399
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#endif // #ifndef __RNBRemote_h__
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