X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Flinux-nat.h;h=0c1695ad1020aa176752e6bb8e877bf815e63077;hb=7cac64af7bc6a7f7a86f90a1465f7c3d2b6f07e8;hp=78312d71b31ebeec988af395ccf233c0664f0fda;hpb=0274a8cedbd446865a1e5fdec8057f4a327e19aa;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/linux-nat.h b/gdb/linux-nat.h
index 78312d71b3..0c1695ad10 100644
--- a/gdb/linux-nat.h
+++ b/gdb/linux-nat.h
@@ -1,11 +1,12 @@
 /* Native debugging support for GNU/Linux (LWP layer).
-   Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+
+   Copyright (C) 2000-2019 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -14,11 +15,185 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef LINUX_NAT_H
+#define LINUX_NAT_H
+
+#include "nat/linux-nat.h"
+#include "inf-ptrace.h"
+#include "target.h"
+#include <signal.h>
+
+/* A prototype generic GNU/Linux target.  A concrete instance should
+   override it with local methods.  */
+
+class linux_nat_target : public inf_ptrace_target
+{
+public:
+  linux_nat_target ();
+  ~linux_nat_target () override = 0;
+
+  thread_control_capabilities get_thread_control_capabilities () override
+  { return tc_schedlock; }
+
+  void create_inferior (const char *, const std::string &,
+			char **, int) override;
+
+  void attach (const char *, int) override;
+
+  void detach (inferior *, int) override;
+
+  void resume (ptid_t, int, enum gdb_signal) override;
+
+  ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
+
+  void pass_signals (gdb::array_view<const unsigned char>) override;
+
+  enum target_xfer_status xfer_partial (enum target_object object,
+					const char *annex,
+					gdb_byte *readbuf,
+					const gdb_byte *writebuf,
+					ULONGEST offset, ULONGEST len,
+					ULONGEST *xfered_len) override;
+
+  void kill () override;
+
+  void mourn_inferior () override;
+  bool thread_alive (ptid_t ptid) override;
+
+  void update_thread_list () override;
+
+  std::string pid_to_str (ptid_t) override;
+
+  const char *thread_name (struct thread_info *) override;
+
+  struct address_space *thread_address_space (ptid_t) override;
+
+  bool stopped_by_watchpoint () override;
+
+  bool stopped_data_address (CORE_ADDR *) override;
+
+  bool stopped_by_sw_breakpoint () override;
+  bool supports_stopped_by_sw_breakpoint () override;
+
+  bool stopped_by_hw_breakpoint () override;
+  bool supports_stopped_by_hw_breakpoint () override;
+
+  void thread_events (int) override;
+
+  bool can_async_p () override;
+  bool is_async_p () override;
+
+  bool supports_non_stop () override;
+  bool always_non_stop_p () override;
+
+  void async (int) override;
+
+  void close () override;
+
+  void stop (ptid_t) override;
+
+  bool supports_multi_process () override;
+
+  bool supports_disable_randomization () override;
+
+  int core_of_thread (ptid_t ptid) override;
+
+  bool filesystem_is_local () override;
+
+  int fileio_open (struct inferior *inf, const char *filename,
+		   int flags, int mode, int warn_if_slow,
+		   int *target_errno) override;
+
+  gdb::optional<std::string>
+    fileio_readlink (struct inferior *inf,
+		     const char *filename,
+		     int *target_errno) override;
+
+  int fileio_unlink (struct inferior *inf,
+		     const char *filename,
+		     int *target_errno) override;
+
+  int insert_fork_catchpoint (int) override;
+  int remove_fork_catchpoint (int) override;
+  int insert_vfork_catchpoint (int) override;
+  int remove_vfork_catchpoint (int) override;
+
+  int insert_exec_catchpoint (int) override;
+  int remove_exec_catchpoint (int) override;
 
-/* Structure describing an LWP.  */
+  int set_syscall_catchpoint (int pid, bool needed, int any_count,
+			      gdb::array_view<const int> syscall_counts) override;
+
+  char *pid_to_exec_file (int pid) override;
+
+  void post_startup_inferior (ptid_t) override;
+
+  void post_attach (int) override;
+
+  int follow_fork (int, int) override;
+
+  std::vector<static_tracepoint_marker>
+    static_tracepoint_markers_by_strid (const char *id) override;
+
+  /* Methods that are meant to overridden by the concrete
+     arch-specific target instance.  */
+
+  virtual void low_resume (ptid_t ptid, int step, enum gdb_signal sig)
+  { inf_ptrace_target::resume (ptid, step, sig); }
+
+  virtual bool low_stopped_by_watchpoint ()
+  { return false; }
+
+  virtual bool low_stopped_data_address (CORE_ADDR *addr_p)
+  { return false; }
+
+  /* The method to call, if any, when a new thread is attached.  */
+  virtual void low_new_thread (struct lwp_info *)
+  {}
+
+  /* The method to call, if any, when a thread is destroyed.  */
+  virtual void low_delete_thread (struct arch_lwp_info *lp)
+  {
+    gdb_assert (lp == NULL);
+  }
+
+  /* The method to call, if any, when a new fork is attached.  */
+  virtual void low_new_fork (struct lwp_info *parent, pid_t child_pid)
+  {}
+
+  /* The method to call, if any, when a process is no longer
+     attached.  */
+  virtual void low_forget_process (pid_t pid)
+  {}
+
+  /* Hook to call prior to resuming a thread.  */
+  virtual void low_prepare_to_resume (struct lwp_info *)
+  {}
+
+  /* Convert a ptrace/host siginfo object, into/from the siginfo in
+     the layout of the inferiors' architecture.  Returns true if any
+     conversion was done; false otherwise, in which case the caller
+     does a straight memcpy.  If DIRECTION is 1, then copy from INF to
+     PTRACE.  If DIRECTION is 0, copy from PTRACE to INF.  */
+  virtual bool low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf,
+				  int direction)
+  { return false; }
+
+  /* SIGTRAP-like breakpoint status events recognizer.  The default
+     recognizes SIGTRAP only.  */
+  virtual bool low_status_is_event (int status);
+};
+
+/* The final/concrete instance.  */
+extern linux_nat_target *linux_target;
+
+struct arch_lwp_info;
+
+/* Structure describing an LWP.  This is public only for the purposes
+   of ALL_LWPS; target-specific code should generally not access it
+   directly.  */
 
 struct lwp_info
 {
@@ -26,10 +201,9 @@ struct lwp_info
      and overall process id.  */
   ptid_t ptid;
 
-  /* Non-zero if this LWP is cloned.  In this context "cloned" means
-     that the LWP is reporting to its parent using a signal other than
-     SIGCHLD.  */
-  int cloned;
+  /* If this flag is set, we need to set the event request flags the
+     next time we see this LWP stop.  */
+  int must_set_ptrace_flags;
 
   /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
      it back yet).  */
@@ -46,25 +220,110 @@ struct lwp_info
      didn't try to let the LWP run.  */
   int resumed;
 
+  /* The last resume GDB requested on this thread.  */
+  enum resume_kind last_resume_kind;
+
   /* If non-zero, a pending wait status.  */
   int status;
 
+  /* When 'stopped' is set, this is where the lwp last stopped, with
+     decr_pc_after_break already accounted for.  If the LWP is
+     running, and stepping, this is the address at which the lwp was
+     resumed (that is, it's the previous stop PC).  If the LWP is
+     running and not stepping, this is 0.  */
+  CORE_ADDR stop_pc;
+
   /* Non-zero if we were stepping this LWP.  */
   int step;
 
-  /* Next LWP in list.  */
+  /* The reason the LWP last stopped, if we need to track it
+     (breakpoint, watchpoint, etc.)  */
+  enum target_stop_reason stop_reason;
+
+  /* On architectures where it is possible to know the data address of
+     a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
+     STOPPED_DATA_ADDRESS contains such data address.  Otherwise,
+     STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
+     undefined.  Only valid if STOPPED_BY_WATCHPOINT is true.  */
+  int stopped_data_address_p;
+  CORE_ADDR stopped_data_address;
+
+  /* Non-zero if we expect a duplicated SIGINT.  */
+  int ignore_sigint;
+
+  /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
+     for this LWP's last event.  This may correspond to STATUS above,
+     or to a local variable in lin_lwp_wait.  */
+  struct target_waitstatus waitstatus;
+
+  /* Signal whether we are in a SYSCALL_ENTRY or
+     in a SYSCALL_RETURN event.
+     Values:
+     - TARGET_WAITKIND_SYSCALL_ENTRY
+     - TARGET_WAITKIND_SYSCALL_RETURN */
+  enum target_waitkind syscall_state;
+
+  /* The processor core this LWP was last seen on.  */
+  int core;
+
+  /* Arch-specific additions.  */
+  struct arch_lwp_info *arch_private;
+
+  /* Previous and next pointers in doubly-linked list of known LWPs,
+     sorted by reverse creation order.  */
+  struct lwp_info *prev;
   struct lwp_info *next;
 };
 
-/* Read/write to target memory via Linux's "proc file system".  */
-struct mem_attrib;
-extern int linux_proc_xfer_memory (CORE_ADDR addr, char *myaddr, int len,
-				   int write, struct mem_attrib *attrib,
-				   struct target_ops *target);
+/* The global list of LWPs, for ALL_LWPS.  Unlike the threads list,
+   there is always at least one LWP on the list while the GNU/Linux
+   native target is active.  */
+extern struct lwp_info *lwp_list;
+
+/* Does the current host support PTRACE_GETREGSET?  */
+extern enum tribool have_ptrace_getregset;
+
+/* Iterate over each active thread (light-weight process).  */
+#define ALL_LWPS(LP)							\
+  for ((LP) = lwp_list;							\
+       (LP) != NULL;							\
+       (LP) = (LP)->next)
+
+/* Attempt to initialize libthread_db.  */
+void check_for_thread_db (void);
+
+/* Called from the LWP layer to inform the thread_db layer that PARENT
+   spawned CHILD.  Both LWPs are currently stopped.  This function
+   does whatever is required to have the child LWP under the
+   thread_db's control --- e.g., enabling event reporting.  Returns
+   true on success, false if the process isn't using libpthread.  */
+extern int thread_db_notice_clone (ptid_t parent, ptid_t child);
+
+/* Return the set of signals used by the threads library.  */
+extern void lin_thread_get_thread_signals (sigset_t *mask);
+
+/* Find process PID's pending signal set from /proc/pid/status.  */
+void linux_proc_pending_signals (int pid, sigset_t *pending,
+				 sigset_t *blocked, sigset_t *ignored);
+
+/* For linux_stop_lwp see nat/linux-nat.h.  */
+
+/* Stop all LWPs, synchronously.  (Any events that trigger while LWPs
+   are being stopped are left pending.)  */
+extern void linux_stop_and_wait_all_lwps (void);
+
+/* Set resumed LWPs running again, as they were before being stopped
+   with linux_stop_and_wait_all_lwps.  (LWPS with pending events are
+   left stopped.)  */
+extern void linux_unstop_all_lwps (void);
+
+/* Update linux-nat internal state when changing from one fork
+   to another.  */
+void linux_nat_switch_fork (ptid_t new_ptid);
 
-extern void linux_record_stopped_pid (int pid);
+/* Store the saved siginfo associated with PTID in *SIGINFO.
+   Return 1 if it was retrieved successfully, 0 otherwise (*SIGINFO is
+   uninitialized in such case).  */
+int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
 
-/* Iterator function for lin-lwp's lwp list.  */
-struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *, 
-						     void *), 
-				    void *data);
+#endif /* LINUX_NAT_H */