c4e25c9648
Summary: Previously, we reported inferior receiving SIGSEGV (or SIGILL, SIGFPE, SIGBUS) as an "exception" to LLDB, presumably to match OSX behaviour. Beside the fact that we were basically lying to the user, this was also causing problems with inferiors which handle SIGSEGV by themselves, since LLDB was unable to reinject this signal back into the inferior. This commit changes LLGS to report SIGSEGV as a signal. This has necessitated some changes in the test-suite, which had previously used eStopReasonException to locate threads that crashed. Now it uses platform-specific logic, which in the case of linux searches for eStopReasonSignaled with signal=SIGSEGV. I have also added the ability to set the description of StopInfoUnixSignal using the description field of the gdb-remote packet. The linux stub uses this to display additional information about the segfault (invalid address, address access protected, etc.). Test Plan: All tests pass on linux and osx. Reviewers: ovyalov, clayborg, emaste Subscribers: emaste, lldb-commits Differential Revision: http://reviews.llvm.org/D10057 llvm-svn: 238549
133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
//===-- NativeThreadLinux.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_NativeThreadLinux_H_
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#define liblldb_NativeThreadLinux_H_
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#include "lldb/lldb-private-forward.h"
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#include "lldb/Host/common/NativeThreadProtocol.h"
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#include <map>
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#include <string>
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namespace lldb_private {
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namespace process_linux {
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class NativeProcessLinux;
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class NativeThreadLinux : public NativeThreadProtocol
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{
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friend class NativeProcessLinux;
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public:
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NativeThreadLinux (NativeProcessLinux *process, lldb::tid_t tid);
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// ---------------------------------------------------------------------
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// NativeThreadProtocol Interface
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// ---------------------------------------------------------------------
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std::string
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GetName() override;
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lldb::StateType
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GetState () override;
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bool
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GetStopReason (ThreadStopInfo &stop_info, std::string& description) override;
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NativeRegisterContextSP
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GetRegisterContext () override;
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Error
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SetWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags, bool hardware) override;
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Error
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RemoveWatchpoint (lldb::addr_t addr) override;
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private:
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// ---------------------------------------------------------------------
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// Interface for friend classes
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// ---------------------------------------------------------------------
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void
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SetRunning ();
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void
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SetStepping ();
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void
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SetStoppedBySignal(uint32_t signo, const siginfo_t *info = nullptr);
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/// Return true if the thread is stopped.
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/// If stopped by a signal, indicate the signo in the signo argument.
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/// Otherwise, return LLDB_INVALID_SIGNAL_NUMBER.
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bool
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IsStopped (int *signo);
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void
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SetStoppedByExec ();
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void
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SetStoppedByBreakpoint ();
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void
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SetStoppedByWatchpoint (uint32_t wp_index);
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bool
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IsStoppedAtBreakpoint ();
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bool
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IsStoppedAtWatchpoint ();
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void
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SetStoppedByTrace ();
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void
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SetCrashedWithException (const siginfo_t& info);
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void
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SetSuspended ();
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void
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SetExited ();
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Error
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RequestStop ();
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typedef std::function<Error (lldb::tid_t tid, bool supress_signal)> ResumeThreadFunction;
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struct ThreadContext
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{
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bool stop_requested = false;
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ResumeThreadFunction request_resume_function;
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};
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ThreadContext &
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GetThreadContext() { return m_thread_context; }
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// ---------------------------------------------------------------------
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// Private interface
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// ---------------------------------------------------------------------
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void
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MaybeLogStateChange (lldb::StateType new_state);
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// ---------------------------------------------------------------------
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// Member Variables
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// ---------------------------------------------------------------------
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lldb::StateType m_state;
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ThreadStopInfo m_stop_info;
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NativeRegisterContextSP m_reg_context_sp;
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std::string m_stop_description;
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using WatchpointIndexMap = std::map<lldb::addr_t, uint32_t>;
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WatchpointIndexMap m_watchpoint_index_map;
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ThreadContext m_thread_context;
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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_NativeThreadLinux_H_
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