Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 641 insertions, 0 deletions

diff --git a/gdb/hpux-thread.c b/gdb/hpux-thread.c
new file mode 100644
index 0000000..36421f3
--- /dev/null
+++ b/gdb/hpux-thread.c
@@ -0,0 +1,641 @@
+/* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger.
+   Copyright 1996, 1999 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
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+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.  */
+
+/* This module implements a sort of half target that sits between the
+   machine-independent parts of GDB and the ptrace interface (infptrace.c) to
+   provide access to the HPUX user-mode thread implementation.
+
+   HPUX threads are true user-mode threads, which are invoked via the cma_*
+   and pthread_* (DCE and Posix respectivly) interfaces.  These are mostly
+   implemented in user-space, with all thread context kept in various
+   structures that live in the user's heap.  For the most part, the kernel has
+   no knowlege of these threads.
+
+   */
+
+#include "defs.h"
+
+#define _CMA_NOWRAPPERS_
+
+#include <cma_tcb_defs.h>
+#include <cma_deb_core.h>
+#include "gdbthread.h"
+#include "target.h"
+#include "inferior.h"
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include "gdbcore.h"
+
+extern int child_suppress_run;
+extern struct target_ops child_ops; /* target vector for inftarg.c */
+
+extern void _initialize_hpux_thread PARAMS ((void));
+
+struct string_map
+{
+  int num;
+  char *str;
+};
+
+static int hpux_thread_active = 0;
+
+static int main_pid;		/* Real process ID */
+
+static CORE_ADDR P_cma__g_known_threads;
+static CORE_ADDR P_cma__g_current_thread;
+
+static struct cleanup * save_inferior_pid PARAMS ((void));
+
+static void restore_inferior_pid PARAMS ((int pid));
+
+static void hpux_thread_resume PARAMS ((int pid, int step,
+					enum target_signal signo));
+
+static void init_hpux_thread_ops PARAMS ((void));
+
+static struct target_ops hpux_thread_ops;
+
+/*
+
+LOCAL FUNCTION
+
+	save_inferior_pid - Save inferior_pid on the cleanup list
+	restore_inferior_pid - Restore inferior_pid from the cleanup list
+
+SYNOPSIS
+
+	struct cleanup *save_inferior_pid ()
+	void restore_inferior_pid (int pid)
+
+DESCRIPTION
+
+	These two functions act in unison to restore inferior_pid in
+	case of an error.
+
+NOTES
+
+	inferior_pid is a global variable that needs to be changed by many of
+	these routines before calling functions in procfs.c.  In order to
+	guarantee that inferior_pid gets restored (in case of errors), you
+	need to call save_inferior_pid before changing it.  At the end of the
+	function, you should invoke do_cleanups to restore it.
+
+ */
+
+
+static struct cleanup *
+save_inferior_pid ()
+{
+  return make_cleanup (restore_inferior_pid, inferior_pid);
+}
+
+static void
+restore_inferior_pid (pid)
+     int pid;
+{
+  inferior_pid = pid;
+}
+
+static int find_active_thread PARAMS ((void));
+
+static int cached_thread;
+static int cached_active_thread;
+static cma__t_int_tcb cached_tcb;
+
+static int
+find_active_thread ()
+{
+  static cma__t_int_tcb tcb;
+  CORE_ADDR tcb_ptr;
+
+  if (cached_active_thread != 0)
+    return cached_active_thread;
+
+  read_memory ((CORE_ADDR)P_cma__g_current_thread,
+	       (char *)&tcb_ptr,
+	       sizeof tcb_ptr);
+
+  read_memory (tcb_ptr, (char *)&tcb, sizeof tcb);
+
+  return (cma_thread_get_unique (&tcb.prolog.client_thread) << 16) | main_pid;
+}
+
+static cma__t_int_tcb * find_tcb PARAMS ((int thread));
+
+static cma__t_int_tcb *
+find_tcb (thread)
+     int thread;
+{
+  cma__t_known_object queue_header;
+  cma__t_queue *queue_ptr;
+
+  if (thread == cached_thread)
+    return &cached_tcb;
+
+  read_memory ((CORE_ADDR)P_cma__g_known_threads,
+	       (char *)&queue_header,
+	       sizeof queue_header);
+
+  for (queue_ptr = queue_header.queue.flink;
+       queue_ptr != (cma__t_queue *)P_cma__g_known_threads;
+       queue_ptr = cached_tcb.threads.flink)
+    {
+      cma__t_int_tcb *tcb_ptr;
+
+      tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb);
+
+      read_memory ((CORE_ADDR)tcb_ptr, (char *)&cached_tcb, sizeof cached_tcb);
+
+      if (cached_tcb.header.type == cma__c_obj_tcb)
+	if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread >> 16)
+	  {
+	    cached_thread = thread;
+	    return &cached_tcb;
+	  }
+    }
+
+  error ("Can't find TCB %d,%d", thread >> 16, thread & 0xffff);
+  return NULL;
+}
+
+/* Most target vector functions from here on actually just pass through to
+   inftarg.c, as they don't need to do anything specific for threads.  */
+
+/* ARGSUSED */
+static void
+hpux_thread_open (arg, from_tty)
+     char *arg;
+     int from_tty;
+{
+  child_ops.to_open (arg, from_tty);
+}
+
+/* Attach to process PID, then initialize for debugging it
+   and wait for the trace-trap that results from attaching.  */
+
+static void
+hpux_thread_attach (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  child_ops.to_attach (args, from_tty);
+
+  /* XXX - might want to iterate over all the threads and register them. */
+}
+
+/* Take a program previously attached to and detaches it.
+   The program resumes execution and will no longer stop
+   on signals, etc.  We'd better not have left any breakpoints
+   in the program or it'll die when it hits one.  For this
+   to work, it may be necessary for the process to have been
+   previously attached.  It *might* work if the program was
+   started via the normal ptrace (PTRACE_TRACEME).  */
+
+static void
+hpux_thread_detach (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  child_ops.to_detach (args, from_tty);
+}
+
+/* Resume execution of process PID.  If STEP is nozero, then
+   just single step it.  If SIGNAL is nonzero, restart it with that
+   signal activated.  We may have to convert pid from a thread-id to an LWP id
+   for procfs.  */
+
+static void
+hpux_thread_resume (pid, step, signo)
+     int pid;
+     int step;
+     enum target_signal signo;
+{
+  struct cleanup *old_chain;
+
+  old_chain = save_inferior_pid ();
+
+  pid = inferior_pid = main_pid;
+
+#if 0
+  if (pid != -1)
+    {
+      pid = thread_to_lwp (pid, -2);
+      if (pid == -2)		/* Inactive thread */
+	error ("This version of Solaris can't start inactive threads.");
+    }
+#endif
+
+  child_ops.to_resume (pid, step, signo);
+
+  cached_thread = 0;
+  cached_active_thread = 0;
+
+  do_cleanups (old_chain);
+}
+
+/* Wait for any threads to stop.  We may have to convert PID from a thread id
+   to a LWP id, and vice versa on the way out.  */
+
+static int
+hpux_thread_wait (pid, ourstatus)
+     int pid;
+     struct target_waitstatus *ourstatus;
+{
+  int rtnval;
+  struct cleanup *old_chain;
+
+  old_chain = save_inferior_pid ();
+
+  inferior_pid = main_pid;
+
+  if (pid != -1)
+    pid = main_pid;
+
+  rtnval = child_ops.to_wait (pid, ourstatus);
+
+  rtnval = find_active_thread ();
+
+  do_cleanups (old_chain);
+
+  return rtnval;
+}
+
+static char regmap[NUM_REGS] =
+{
+  -2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
+  28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
+
+  /* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
+  -2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
+
+  /* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+
+  /* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
+  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+
+  -1, -1, -1, -1,		/* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
+  144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
+  136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
+  104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
+  72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
+  -1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
+};
+
+static void
+hpux_thread_fetch_registers (regno)
+     int regno;
+{
+  cma__t_int_tcb tcb, *tcb_ptr;
+  struct cleanup *old_chain;
+  int i;
+  int first_regno, last_regno;
+
+  tcb_ptr = find_tcb (inferior_pid);
+
+  old_chain = save_inferior_pid ();
+
+  inferior_pid = main_pid;
+
+  if (tcb_ptr->state == cma__c_state_running)
+    {
+      child_ops.to_fetch_registers (regno);
+
+      do_cleanups (old_chain);
+
+      return;
+    }
+
+  if (regno == -1)
+    {
+      first_regno = 0;
+      last_regno = NUM_REGS - 1;
+    }
+  else
+    {
+      first_regno = regno;
+      last_regno = regno;
+    }
+
+  for (regno = first_regno; regno <= last_regno; regno++)
+    {
+      if (regmap[regno] == -1)
+	child_ops.to_fetch_registers (regno);
+      else
+	{
+	  unsigned char buf[MAX_REGISTER_RAW_SIZE];
+	  CORE_ADDR sp;
+
+	  sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
+
+	  if (regno == FLAGS_REGNUM)
+	    /* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
+	    memset (buf, '\000', REGISTER_RAW_SIZE (regno));
+	  else if (regno == SP_REGNUM)
+	    store_address (buf, sizeof sp, sp);
+	  else if (regno == PC_REGNUM)
+	    read_memory (sp - 20, buf, REGISTER_RAW_SIZE (regno));
+	  else
+	    read_memory (sp + regmap[regno], buf, REGISTER_RAW_SIZE (regno));
+
+	  supply_register (regno, buf);
+	}
+    }
+
+  do_cleanups (old_chain);
+}
+
+static void
+hpux_thread_store_registers (regno)
+     int regno;
+{
+  cma__t_int_tcb tcb, *tcb_ptr;
+  struct cleanup *old_chain;
+  int i;
+  int first_regno, last_regno;
+
+  tcb_ptr = find_tcb (inferior_pid);
+
+  old_chain = save_inferior_pid ();
+
+  inferior_pid = main_pid;
+
+  if (tcb_ptr->state == cma__c_state_running)
+    {
+      child_ops.to_store_registers (regno);
+
+      do_cleanups (old_chain);
+
+      return;
+    }
+
+  if (regno == -1)
+    {
+      first_regno = 0;
+      last_regno = NUM_REGS - 1;
+    }
+  else
+    {
+      first_regno = regno;
+      last_regno = regno;
+    }
+
+  for (regno = first_regno; regno <= last_regno; regno++)
+    {
+      if (regmap[regno] == -1)
+	child_ops.to_store_registers (regno);
+      else
+	{
+	  unsigned char buf[MAX_REGISTER_RAW_SIZE];
+	  CORE_ADDR sp;
+
+	  sp = (CORE_ADDR)tcb_ptr->static_ctx.sp - 160;
+
+	  if (regno == FLAGS_REGNUM)
+	    child_ops.to_store_registers (regno); /* Let lower layer handle this... */
+	  else if (regno == SP_REGNUM)
+	    {
+	      write_memory ((CORE_ADDR)&tcb_ptr->static_ctx.sp,
+			    registers + REGISTER_BYTE (regno),
+			    REGISTER_RAW_SIZE (regno));
+	      tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *)
+		(extract_address (registers + REGISTER_BYTE (regno), REGISTER_RAW_SIZE (regno)) + 160);
+	    }
+	  else if (regno == PC_REGNUM)
+	    write_memory (sp - 20,
+			  registers + REGISTER_BYTE (regno),
+			  REGISTER_RAW_SIZE (regno));
+	  else
+	    write_memory (sp + regmap[regno],
+			  registers + REGISTER_BYTE (regno),
+			  REGISTER_RAW_SIZE (regno));
+	}
+    }
+
+  do_cleanups (old_chain);
+}
+
+/* Get ready to modify the registers array.  On machines which store
+   individual registers, this doesn't need to do anything.  On machines
+   which store all the registers in one fell swoop, this makes sure
+   that registers contains all the registers from the program being
+   debugged.  */
+
+static void
+hpux_thread_prepare_to_store ()
+{
+  child_ops.to_prepare_to_store ();
+}
+
+static int
+hpux_thread_xfer_memory (memaddr, myaddr, len, dowrite, target)
+     CORE_ADDR memaddr;
+     char *myaddr;
+     int len;
+     int dowrite;
+     struct target_ops *target; /* ignored */
+{
+  int retval;
+  struct cleanup *old_chain;
+
+  old_chain = save_inferior_pid ();
+
+  inferior_pid = main_pid;
+
+  retval = child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, target);
+
+  do_cleanups (old_chain);
+
+  return retval;
+}
+
+/* Print status information about what we're accessing.  */
+
+static void
+hpux_thread_files_info (ignore)
+     struct target_ops *ignore;
+{
+  child_ops.to_files_info (ignore);
+}
+
+static void
+hpux_thread_kill_inferior ()
+{
+  child_ops.to_kill ();
+}
+
+static void
+hpux_thread_notice_signals (pid)
+     int pid;
+{
+  child_ops.to_notice_signals (pid);
+}
+
+/* Fork an inferior process, and start debugging it with /proc.  */
+
+static void
+hpux_thread_create_inferior (exec_file, allargs, env)
+     char *exec_file;
+     char *allargs;
+     char **env;
+{
+  child_ops.to_create_inferior (exec_file, allargs, env);
+
+  if (hpux_thread_active)
+    {
+      main_pid = inferior_pid;
+
+      push_target (&hpux_thread_ops);
+
+      inferior_pid = find_active_thread ();
+
+      add_thread (inferior_pid);
+    }
+}
+
+/* This routine is called whenever a new symbol table is read in, or when all
+   symbol tables are removed.  libthread_db can only be initialized when it
+   finds the right variables in libthread.so.  Since it's a shared library,
+   those variables don't show up until the library gets mapped and the symbol
+   table is read in.  */
+
+void
+hpux_thread_new_objfile (objfile)
+     struct objfile *objfile;
+{
+  struct minimal_symbol *ms;
+
+  if (!objfile)
+    {
+      hpux_thread_active = 0;
+
+      return;
+    }
+
+  ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile);
+
+  if (!ms)
+    return;
+
+  P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms);
+
+  ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile);
+
+  if (!ms)
+    return;
+
+  P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms);
+
+  hpux_thread_active = 1;
+}
+
+/* Clean up after the inferior dies.  */
+
+static void
+hpux_thread_mourn_inferior ()
+{
+  child_ops.to_mourn_inferior ();
+}
+
+/* Mark our target-struct as eligible for stray "run" and "attach" commands.  */
+
+static int
+hpux_thread_can_run ()
+{
+  return child_suppress_run;
+}
+
+static int
+hpux_thread_alive (pid)
+     int pid;
+{
+  return 1;
+}
+
+static void
+hpux_thread_stop ()
+{
+  child_ops.to_stop ();
+}
+
+/* Convert a pid to printable form. */
+
+char *
+hpux_pid_to_str (pid)
+     int pid;
+{
+  static char buf[100];
+
+  sprintf (buf, "Thread %d", pid >> 16);
+
+  return buf;
+}
+
+static void
+init_hpux_thread_ops ()
+{
+  hpux_thread_ops.to_shortname = "hpux-threads";
+  hpux_thread_ops.to_longname = "HPUX threads and pthread.";
+  hpux_thread_ops.to_doc = "HPUX threads and pthread support.";
+  hpux_thread_ops.to_open = hpux_thread_open;
+  hpux_thread_ops.to_attach = hpux_thread_attach;
+  hpux_thread_ops.to_detach = hpux_thread_detach;
+  hpux_thread_ops.to_resume = hpux_thread_resume;
+  hpux_thread_ops.to_wait = hpux_thread_wait;
+  hpux_thread_ops.to_fetch_registers = hpux_thread_fetch_registers;
+  hpux_thread_ops.to_store_registers = hpux_thread_store_registers;
+  hpux_thread_ops.to_prepare_to_store = hpux_thread_prepare_to_store;
+  hpux_thread_ops.to_xfer_memory = hpux_thread_xfer_memory;
+  hpux_thread_ops.to_files_info = hpux_thread_files_info;
+  hpux_thread_ops.to_insert_breakpoint = memory_insert_breakpoint;
+  hpux_thread_ops.to_remove_breakpoint = memory_remove_breakpoint;
+  hpux_thread_ops.to_terminal_init = terminal_init_inferior;
+  hpux_thread_ops.to_terminal_inferior = terminal_inferior;
+  hpux_thread_ops.to_terminal_ours_for_output = terminal_ours_for_output;
+  hpux_thread_ops.to_terminal_ours = terminal_ours;
+  hpux_thread_ops.to_terminal_info = child_terminal_info;
+  hpux_thread_ops.to_kill = hpux_thread_kill_inferior;
+  hpux_thread_ops.to_create_inferior = hpux_thread_create_inferior;
+  hpux_thread_ops.to_mourn_inferior = hpux_thread_mourn_inferior;
+  hpux_thread_ops.to_can_run = hpux_thread_can_run;
+  hpux_thread_ops.to_notice_signals = hpux_thread_notice_signals;
+  hpux_thread_ops.to_thread_alive = hpux_thread_thread_alive;
+  hpux_thread_ops.to_stop = hpux_thread_stop;
+  hpux_thread_ops.to_stratum = process_stratum;
+  hpux_thread_ops.to_has_all_memory = 1;
+  hpux_thread_ops.to_has_memory = 1;
+  hpux_thread_ops.to_has_stack = 1;
+  hpux_thread_ops.to_has_registers = 1;
+  hpux_thread_ops.to_has_execution = 1;
+  hpux_thread_ops.to_magic = OPS_MAGIC;
+}
+
+void
+_initialize_hpux_thread ()
+{
+  init_hpux_thread_ops ();
+  add_target (&hpux_thread_ops);
+
+  child_suppress_run = 1;
+}