20ee21bde6
jGetLoadedDynamicLibrariesInfos. This packet is similar to qXfer:libraries:read except that lldb supplies the number of solibs that should be reported about, and the start address for the list of them. At the initial process launch we'll read the full list of solibs linked by the process -- at this point we could be using qXfer:libraries:read -- but on subsequence solib-loaded notifications, we'll be fetching a smaller number of solibs, often only one or two. A typical Mac/iOS GUI app may have a couple hundred different solibs loaded - doing all of the loads via memory reads takes a couple of megabytes of traffic between lldb and debugserver. Having debugserver summarize the load addresses of all the solibs and sending it in JSON requires a couple of hundred kilobytes of traffic. It's a significant performance improvement when communicating over a slower channel. This patch leaves all of the logic for loading the libraries in DynamicLoaderMacOSXDYLD -- it only call over ot ProcesGDBRemote to get the JSON result. If the jGetLoadedDynamicLibrariesInfos packet is not implemented, the normal technique of using memory read packets to get all of the details from the target will be used. <rdar://problem/21007465> llvm-svn: 241964
468 lines
14 KiB
C++
468 lines
14 KiB
C++
//===-- ProcessGDBRemote.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_ProcessGDBRemote_h_
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#define liblldb_ProcessGDBRemote_h_
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// C Includes
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// C++ Includes
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#include <list>
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#include <vector>
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// Other libraries and framework includes
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/Core/Broadcaster.h"
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#include "lldb/Core/ConstString.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/StringList.h"
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#include "lldb/Core/StructuredData.h"
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#include "lldb/Core/ThreadSafeValue.h"
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#include "lldb/Host/HostThread.h"
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#include "lldb/lldb-private-forward.h"
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#include "lldb/Utility/StringExtractor.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Thread.h"
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#include "GDBRemoteCommunicationClient.h"
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#include "GDBRemoteRegisterContext.h"
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namespace lldb_private {
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namespace process_gdb_remote {
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class ThreadGDBRemote;
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class ProcessGDBRemote : public Process
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{
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public:
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//------------------------------------------------------------------
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// Constructors and Destructors
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//------------------------------------------------------------------
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static lldb::ProcessSP
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CreateInstance (Target& target,
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Listener &listener,
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const FileSpec *crash_file_path);
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static void
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Initialize();
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static void
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DebuggerInitialize (Debugger &debugger);
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static void
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Terminate();
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static ConstString
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GetPluginNameStatic();
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static const char *
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GetPluginDescriptionStatic();
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//------------------------------------------------------------------
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// Constructors and Destructors
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//------------------------------------------------------------------
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ProcessGDBRemote(Target& target, Listener &listener);
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virtual
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~ProcessGDBRemote();
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//------------------------------------------------------------------
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// Check if a given Process
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//------------------------------------------------------------------
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bool
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CanDebug (Target &target, bool plugin_specified_by_name) override;
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CommandObject *
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GetPluginCommandObject() override;
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//------------------------------------------------------------------
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// Creating a new process, or attaching to an existing one
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//------------------------------------------------------------------
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Error
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WillLaunch (Module* module) override;
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Error
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DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) override;
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void
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DidLaunch () override;
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Error
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WillAttachToProcessWithID (lldb::pid_t pid) override;
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Error
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WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) override;
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Error
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DoConnectRemote (Stream *strm, const char *remote_url) override;
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Error
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WillLaunchOrAttach ();
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Error
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DoAttachToProcessWithID (lldb::pid_t pid, const ProcessAttachInfo &attach_info) override;
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Error
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DoAttachToProcessWithName (const char *process_name,
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const ProcessAttachInfo &attach_info) override;
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void
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DidAttach (ArchSpec &process_arch) override;
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//------------------------------------------------------------------
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// PluginInterface protocol
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//------------------------------------------------------------------
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ConstString
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GetPluginName() override;
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uint32_t
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GetPluginVersion() override;
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//------------------------------------------------------------------
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// Process Control
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//------------------------------------------------------------------
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Error
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WillResume () override;
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Error
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DoResume () override;
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Error
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DoHalt (bool &caused_stop) override;
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Error
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DoDetach (bool keep_stopped) override;
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bool
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DetachRequiresHalt() override { return true; }
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Error
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DoSignal (int signal) override;
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Error
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DoDestroy () override;
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void
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RefreshStateAfterStop() override;
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//------------------------------------------------------------------
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// Process Queries
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//------------------------------------------------------------------
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bool
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IsAlive () override;
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lldb::addr_t
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GetImageInfoAddress() override;
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//------------------------------------------------------------------
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// Process Memory
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//------------------------------------------------------------------
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size_t
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DoReadMemory (lldb::addr_t addr, void *buf, size_t size, Error &error) override;
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size_t
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DoWriteMemory (lldb::addr_t addr, const void *buf, size_t size, Error &error) override;
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lldb::addr_t
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DoAllocateMemory (size_t size, uint32_t permissions, Error &error) override;
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Error
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GetMemoryRegionInfo (lldb::addr_t load_addr, MemoryRegionInfo ®ion_info) override;
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Error
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DoDeallocateMemory (lldb::addr_t ptr) override;
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//------------------------------------------------------------------
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// Process STDIO
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//------------------------------------------------------------------
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size_t
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PutSTDIN (const char *buf, size_t buf_size, Error &error) override;
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//----------------------------------------------------------------------
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// Process Breakpoints
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//----------------------------------------------------------------------
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Error
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EnableBreakpointSite (BreakpointSite *bp_site) override;
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Error
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DisableBreakpointSite (BreakpointSite *bp_site) override;
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//----------------------------------------------------------------------
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// Process Watchpoints
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//----------------------------------------------------------------------
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Error
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EnableWatchpoint (Watchpoint *wp, bool notify = true) override;
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Error
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DisableWatchpoint (Watchpoint *wp, bool notify = true) override;
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Error
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GetWatchpointSupportInfo (uint32_t &num) override;
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Error
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GetWatchpointSupportInfo (uint32_t &num, bool& after) override;
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bool
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StartNoticingNewThreads() override;
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bool
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StopNoticingNewThreads() override;
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GDBRemoteCommunicationClient &
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GetGDBRemote()
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{
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return m_gdb_comm;
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}
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Error
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SendEventData(const char *data) override;
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//----------------------------------------------------------------------
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// Override DidExit so we can disconnect from the remote GDB server
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//----------------------------------------------------------------------
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void
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DidExit () override;
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void
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SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max);
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bool
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GetModuleSpec(const FileSpec& module_file_spec,
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const ArchSpec& arch,
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ModuleSpec &module_spec) override;
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size_t
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LoadModules() override;
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Error
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GetFileLoadAddress(const FileSpec& file, bool& is_loaded, lldb::addr_t& load_addr) override;
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void
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ModulesDidLoad (ModuleList &module_list) override;
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StructuredData::ObjectSP
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GetLoadedDynamicLibrariesInfos (lldb::addr_t image_list_address, lldb::addr_t image_count) override;
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protected:
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friend class ThreadGDBRemote;
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friend class GDBRemoteCommunicationClient;
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friend class GDBRemoteRegisterContext;
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class GDBLoadedModuleInfoList;
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//----------------------------------------------------------------------
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// Accessors
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//----------------------------------------------------------------------
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bool
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IsRunning ( lldb::StateType state )
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{
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return state == lldb::eStateRunning || IsStepping(state);
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}
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bool
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IsStepping ( lldb::StateType state)
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{
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return state == lldb::eStateStepping;
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}
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bool
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CanResume ( lldb::StateType state)
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{
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return state == lldb::eStateStopped;
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}
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bool
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HasExited (lldb::StateType state)
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{
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return state == lldb::eStateExited;
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}
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bool
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ProcessIDIsValid ( ) const;
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void
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Clear ( );
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Flags &
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GetFlags ()
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{
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return m_flags;
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}
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const Flags &
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GetFlags () const
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{
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return m_flags;
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}
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bool
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UpdateThreadList (ThreadList &old_thread_list,
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ThreadList &new_thread_list) override;
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Error
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LaunchAndConnectToDebugserver (const ProcessInfo &process_info);
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void
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KillDebugserverProcess ();
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void
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BuildDynamicRegisterInfo (bool force);
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void
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SetLastStopPacket (const StringExtractorGDBRemote &response);
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bool
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ParsePythonTargetDefinition(const FileSpec &target_definition_fspec);
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const lldb::DataBufferSP
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GetAuxvData() override;
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StructuredData::ObjectSP
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GetExtendedInfoForThread (lldb::tid_t tid);
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void
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GetMaxMemorySize();
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bool
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CalculateThreadStopInfo (ThreadGDBRemote *thread);
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size_t
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UpdateThreadIDsFromStopReplyThreadsValue (std::string &value);
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//------------------------------------------------------------------
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/// Broadcaster event bits definitions.
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//------------------------------------------------------------------
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enum
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{
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eBroadcastBitAsyncContinue = (1 << 0),
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eBroadcastBitAsyncThreadShouldExit = (1 << 1),
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eBroadcastBitAsyncThreadDidExit = (1 << 2)
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};
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Flags m_flags; // Process specific flags (see eFlags enums)
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GDBRemoteCommunicationClient m_gdb_comm;
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std::atomic<lldb::pid_t> m_debugserver_pid;
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std::vector<StringExtractorGDBRemote> m_stop_packet_stack; // The stop packet stack replaces the last stop packet variable
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Mutex m_last_stop_packet_mutex;
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GDBRemoteDynamicRegisterInfo m_register_info;
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Broadcaster m_async_broadcaster;
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HostThread m_async_thread;
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Mutex m_async_thread_state_mutex;
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typedef std::vector<lldb::tid_t> tid_collection;
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typedef std::vector< std::pair<lldb::tid_t,int> > tid_sig_collection;
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typedef std::map<lldb::addr_t, lldb::addr_t> MMapMap;
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typedef std::map<uint32_t, std::string> ExpeditedRegisterMap;
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tid_collection m_thread_ids; // Thread IDs for all threads. This list gets updated after stopping
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StructuredData::ObjectSP m_threads_info_sp; // Stop info for all threads if "jThreadsInfo" packet is supported
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tid_collection m_continue_c_tids; // 'c' for continue
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tid_sig_collection m_continue_C_tids; // 'C' for continue with signal
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tid_collection m_continue_s_tids; // 's' for step
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tid_sig_collection m_continue_S_tids; // 'S' for step with signal
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uint64_t m_max_memory_size; // The maximum number of bytes to read/write when reading and writing memory
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uint64_t m_remote_stub_max_memory_size; // The maximum memory size the remote gdb stub can handle
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MMapMap m_addr_to_mmap_size;
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lldb::BreakpointSP m_thread_create_bp_sp;
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bool m_waiting_for_attach;
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bool m_destroy_tried_resuming;
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lldb::CommandObjectSP m_command_sp;
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int64_t m_breakpoint_pc_offset;
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lldb::tid_t m_initial_tid; // The inital thread ID, given by stub on attach
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bool
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HandleNotifyPacket(StringExtractorGDBRemote &packet);
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bool
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StartAsyncThread ();
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void
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StopAsyncThread ();
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static lldb::thread_result_t
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AsyncThread (void *arg);
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static bool
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MonitorDebugserverProcess (void *callback_baton,
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lldb::pid_t pid,
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bool exited,
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int signo,
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int exit_status);
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lldb::StateType
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SetThreadStopInfo (StringExtractor& stop_packet);
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lldb::StateType
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SetThreadStopInfo (StructuredData::Dictionary *thread_dict);
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lldb::ThreadSP
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SetThreadStopInfo (lldb::tid_t tid,
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ExpeditedRegisterMap &expedited_register_map,
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uint8_t signo,
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const std::string &thread_name,
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const std::string &reason,
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const std::string &description,
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uint32_t exc_type,
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const std::vector<lldb::addr_t> &exc_data,
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lldb::addr_t thread_dispatch_qaddr,
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bool queue_vars_valid,
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std::string &queue_name,
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lldb::QueueKind queue_kind,
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uint64_t queue_serial);
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void
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HandleStopReplySequence ();
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void
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ClearThreadIDList ();
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bool
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UpdateThreadIDList ();
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void
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DidLaunchOrAttach (ArchSpec& process_arch);
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Error
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ConnectToDebugserver (const char *host_port);
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const char *
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GetDispatchQueueNameForThread (lldb::addr_t thread_dispatch_qaddr,
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std::string &dispatch_queue_name);
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DynamicLoader *
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GetDynamicLoader () override;
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// Query remote GDBServer for register information
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bool
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GetGDBServerRegisterInfo ();
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// Query remote GDBServer for a detailed loaded library list
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Error
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GetLoadedModuleList (GDBLoadedModuleInfoList &);
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lldb::ModuleSP
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LoadModuleAtAddress (const FileSpec &file, lldb::addr_t base_addr);
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private:
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//------------------------------------------------------------------
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// For ProcessGDBRemote only
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//------------------------------------------------------------------
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static bool
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NewThreadNotifyBreakpointHit (void *baton,
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StoppointCallbackContext *context,
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lldb::user_id_t break_id,
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lldb::user_id_t break_loc_id);
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DISALLOW_COPY_AND_ASSIGN (ProcessGDBRemote);
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};
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} // namespace process_gdb_remote
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} // namespace lldb_private
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#endif // liblldb_ProcessGDBRemote_h_
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