0b90be1c4f
A "qSymbol::" is sent when shared libraries have been loaded by hooking into the Process::ModulesDidLoad() function from within ProcessGDBRemote. This function was made virtual so that the ProcessGDBRemote version is called, which then first calls the Process::ModulesDidLoad(), and then it queries for any symbol lookups that the remote GDB server might want to do. This allows debugserver to request the "dispatch_queue_offsets" symbol so that it can read the queue name, queue kind and queue serial number and include this data as part of the stop reply packet. Previously each thread would have to do 3 memory reads in order to read the queue name. This is part of reducing the number of packets that are sent between LLDB and the remote GDB server. <rdar://problem/21494354> llvm-svn: 240466
139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
//===-- ThreadGDBRemote.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_ThreadGDBRemote_h_
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#define liblldb_ThreadGDBRemote_h_
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#include <string>
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#include "lldb/Core/StructuredData.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Thread.h"
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class StringExtractor;
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namespace lldb_private {
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namespace process_gdb_remote {
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class ProcessGDBRemote;
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class ThreadGDBRemote : public Thread
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{
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public:
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ThreadGDBRemote (Process &process, lldb::tid_t tid);
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virtual
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~ThreadGDBRemote ();
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void
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WillResume (lldb::StateType resume_state) override;
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void
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RefreshStateAfterStop() override;
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const char *
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GetName () override;
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const char *
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GetQueueName () override;
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lldb::queue_id_t
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GetQueueID () override;
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lldb::QueueSP
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GetQueue () override;
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lldb::addr_t
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GetQueueLibdispatchQueueAddress () override;
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lldb::RegisterContextSP
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GetRegisterContext () override;
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lldb::RegisterContextSP
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CreateRegisterContextForFrame (StackFrame *frame) override;
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void
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Dump (Log *log, uint32_t index);
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static bool
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ThreadIDIsValid (lldb::tid_t thread);
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bool
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ShouldStop (bool &step_more);
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const char *
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GetBasicInfoAsString ();
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void
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SetName (const char *name) override
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{
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if (name && name[0])
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m_thread_name.assign (name);
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else
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m_thread_name.clear();
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}
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lldb::addr_t
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GetThreadDispatchQAddr ()
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{
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return m_thread_dispatch_qaddr;
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}
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void
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SetThreadDispatchQAddr (lldb::addr_t thread_dispatch_qaddr)
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{
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m_thread_dispatch_qaddr = thread_dispatch_qaddr;
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}
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void
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ClearQueueInfo ();
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void
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SetQueueInfo (std::string &&queue_name, lldb::QueueKind queue_kind, uint64_t queue_serial);
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StructuredData::ObjectSP
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FetchThreadExtendedInfo () override;
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protected:
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friend class ProcessGDBRemote;
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bool
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PrivateSetRegisterValue (uint32_t reg,
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StringExtractor &response);
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bool
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CachedQueueInfoIsValid() const
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{
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return m_queue_kind != lldb::eQueueKindUnknown;
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}
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//------------------------------------------------------------------
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// Member variables.
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//------------------------------------------------------------------
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std::string m_thread_name;
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std::string m_dispatch_queue_name;
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lldb::addr_t m_thread_dispatch_qaddr;
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lldb::QueueKind m_queue_kind; // Queue info from stop reply/stop info for thread
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uint64_t m_queue_serial; // Queue info from stop reply/stop info for thread
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//------------------------------------------------------------------
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// Member variables.
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//------------------------------------------------------------------
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void
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SetStopInfoFromPacket (StringExtractor &stop_packet, uint32_t stop_id);
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bool
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CalculateStopInfo () override;
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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_ThreadGDBRemote_h_
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