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https://github.com/darlinghq/darling-gdb.git
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f7926acf20
overloading the thread and the pid into the same 32-bit value. Make associated necessary adaptations. Also remove unused variable cached_active_thread.
586 lines
15 KiB
C
586 lines
15 KiB
C
/* Low level interface for debugging HPUX/DCE threads for GDB, the GNU debugger.
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Copyright 1996, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This module implements a sort of half target that sits between the
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machine-independent parts of GDB and the ptrace interface (infptrace.c) to
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provide access to the HPUX user-mode thread implementation.
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HPUX threads are true user-mode threads, which are invoked via the cma_*
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and pthread_* (DCE and Posix respectivly) interfaces. These are mostly
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implemented in user-space, with all thread context kept in various
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structures that live in the user's heap. For the most part, the kernel has
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no knowlege of these threads.
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*/
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#include "defs.h"
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#define _CMA_NOWRAPPERS_
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#include <cma_tcb_defs.h>
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#include <cma_deb_core.h>
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#include "gdbthread.h"
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#include "target.h"
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#include "inferior.h"
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#include "regcache.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "gdbcore.h"
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extern int child_suppress_run;
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extern struct target_ops child_ops; /* target vector for inftarg.c */
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extern void _initialize_hpux_thread (void);
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struct string_map
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{
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int num;
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char *str;
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};
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static int hpux_thread_active = 0;
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static ptid_t main_ptid; /* Real process ID */
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static CORE_ADDR P_cma__g_known_threads;
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static CORE_ADDR P_cma__g_current_thread;
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static void hpux_thread_resume (ptid_t ptid, int step,
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enum target_signal signo);
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static void init_hpux_thread_ops (void);
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static struct target_ops hpux_thread_ops;
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static ptid_t find_active_thread (void);
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static int cached_thread;
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static cma__t_int_tcb cached_tcb;
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static ptid_t
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find_active_thread (void)
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{
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static cma__t_int_tcb tcb;
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CORE_ADDR tcb_ptr;
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read_memory ((CORE_ADDR) P_cma__g_current_thread,
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(char *) &tcb_ptr,
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sizeof tcb_ptr);
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read_memory (tcb_ptr, (char *) &tcb, sizeof tcb);
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return (ptid_build (PIDGET (main_ptid), 0,
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cma_thread_get_unique (&tcb.prolog.client_thread)));
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}
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static cma__t_int_tcb *find_tcb (ptid_t ptid);
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static cma__t_int_tcb *
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find_tcb (ptid_t ptid)
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{
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cma__t_known_object queue_header;
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cma__t_queue *queue_ptr;
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int thread = ptid_get_tid (ptid);
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if (thread == cached_thread)
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return &cached_tcb;
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read_memory ((CORE_ADDR) P_cma__g_known_threads,
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(char *) &queue_header,
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sizeof queue_header);
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for (queue_ptr = queue_header.queue.flink;
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queue_ptr != (cma__t_queue *) P_cma__g_known_threads;
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queue_ptr = cached_tcb.threads.flink)
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{
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cma__t_int_tcb *tcb_ptr;
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tcb_ptr = cma__base (queue_ptr, threads, cma__t_int_tcb);
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read_memory ((CORE_ADDR) tcb_ptr, (char *) &cached_tcb, sizeof cached_tcb);
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if (cached_tcb.header.type == cma__c_obj_tcb)
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if (cma_thread_get_unique (&cached_tcb.prolog.client_thread) == thread)
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{
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cached_thread = thread;
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return &cached_tcb;
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}
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}
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error ("Can't find TCB %d", thread);
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return NULL;
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}
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/* Most target vector functions from here on actually just pass through to
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inftarg.c, as they don't need to do anything specific for threads. */
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/* ARGSUSED */
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static void
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hpux_thread_open (char *arg, int from_tty)
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{
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child_ops.to_open (arg, from_tty);
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}
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/* Attach to process PID, then initialize for debugging it
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and wait for the trace-trap that results from attaching. */
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static void
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hpux_thread_attach (char *args, int from_tty)
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{
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child_ops.to_attach (args, from_tty);
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/* XXX - might want to iterate over all the threads and register them. */
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}
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/* Take a program previously attached to and detaches it.
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The program resumes execution and will no longer stop
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on signals, etc. We'd better not have left any breakpoints
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in the program or it'll die when it hits one. For this
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to work, it may be necessary for the process to have been
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previously attached. It *might* work if the program was
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started via the normal ptrace (PTRACE_TRACEME). */
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static void
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hpux_thread_detach (char *args, int from_tty)
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{
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child_ops.to_detach (args, from_tty);
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}
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/* Resume execution of process PID. If STEP is nozero, then
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just single step it. If SIGNAL is nonzero, restart it with that
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signal activated. We may have to convert pid from a thread-id to an LWP id
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for procfs. */
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static void
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hpux_thread_resume (ptid_t ptid, int step, enum target_signal signo)
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{
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struct cleanup *old_chain;
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old_chain = save_inferior_ptid ();
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ptid = main_ptid;
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inferior_ptid = main_ptid;
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#if 0
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if (pid != -1)
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{
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pid = thread_to_lwp (pid, -2);
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if (pid == -2) /* Inactive thread */
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error ("This version of Solaris can't start inactive threads.");
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}
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#endif
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child_ops.to_resume (ptid, step, signo);
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cached_thread = 0;
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do_cleanups (old_chain);
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}
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/* Wait for any threads to stop. We may have to convert PID from a thread id
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to a LWP id, and vice versa on the way out. */
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static ptid_t
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hpux_thread_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
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{
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ptid_t rtnval;
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struct cleanup *old_chain;
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old_chain = save_inferior_ptid ();
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inferior_ptid = main_ptid;
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if (!ptid_equal (ptid, minus_one_ptid))
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ptid = main_ptid;
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rtnval = child_ops.to_wait (ptid, ourstatus);
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rtnval = find_active_thread ();
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do_cleanups (old_chain);
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return rtnval;
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}
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static char regmap[NUM_REGS] =
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{
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-2, -1, -1, 0, 4, 8, 12, 16, 20, 24, /* flags, r1 -> r9 */
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28, 32, 36, 40, 44, 48, 52, 56, 60, -1, /* r10 -> r19 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* r20 -> r29 */
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/* r30, r31, sar, pcoqh, pcsqh, pcoqt, pcsqt, eiem, iir, isr */
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-2, -1, -1, -2, -1, -1, -1, -1, -1, -1,
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/* ior, ipsw, goto, sr4, sr0, sr1, sr2, sr3, sr5, sr6 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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/* sr7, cr0, cr8, cr9, ccr, cr12, cr13, cr24, cr25, cr26 */
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, /* mpsfu_high, mpsfu_low, mpsfu_ovflo, pad */
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144, -1, -1, -1, -1, -1, -1, -1, /* fpsr, fpe1 -> fpe7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr4 -> fr7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr8 -> fr11 */
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136, -1, 128, -1, 120, -1, 112, -1, /* fr12 -> fr15 */
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104, -1, 96, -1, 88, -1, 80, -1, /* fr16 -> fr19 */
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72, -1, 64, -1, -1, -1, -1, -1, /* fr20 -> fr23 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr24 -> fr27 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* fr28 -> fr31 */
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};
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static void
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hpux_thread_fetch_registers (int regno)
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{
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cma__t_int_tcb tcb, *tcb_ptr;
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struct cleanup *old_chain;
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int i;
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int first_regno, last_regno;
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tcb_ptr = find_tcb (inferior_ptid);
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old_chain = save_inferior_ptid ();
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inferior_ptid = main_ptid;
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if (tcb_ptr->state == cma__c_state_running)
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{
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child_ops.to_fetch_registers (regno);
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do_cleanups (old_chain);
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return;
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}
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if (regno == -1)
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{
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first_regno = 0;
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last_regno = NUM_REGS - 1;
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}
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else
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{
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first_regno = regno;
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last_regno = regno;
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}
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for (regno = first_regno; regno <= last_regno; regno++)
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{
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if (regmap[regno] == -1)
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child_ops.to_fetch_registers (regno);
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else
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{
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unsigned char buf[MAX_REGISTER_RAW_SIZE];
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CORE_ADDR sp;
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sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160;
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if (regno == FLAGS_REGNUM)
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/* Flags must be 0 to avoid bogus value for SS_INSYSCALL */
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memset (buf, '\000', REGISTER_RAW_SIZE (regno));
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else if (regno == SP_REGNUM)
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store_address (buf, sizeof sp, sp);
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else if (regno == PC_REGNUM)
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read_memory (sp - 20, buf, REGISTER_RAW_SIZE (regno));
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else
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read_memory (sp + regmap[regno], buf, REGISTER_RAW_SIZE (regno));
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supply_register (regno, buf);
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}
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}
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do_cleanups (old_chain);
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}
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static void
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hpux_thread_store_registers (int regno)
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{
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cma__t_int_tcb tcb, *tcb_ptr;
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struct cleanup *old_chain;
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int i;
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int first_regno, last_regno;
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tcb_ptr = find_tcb (inferior_ptid);
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old_chain = save_inferior_ptid ();
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inferior_ptid = main_ptid;
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if (tcb_ptr->state == cma__c_state_running)
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{
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child_ops.to_store_registers (regno);
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do_cleanups (old_chain);
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return;
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}
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if (regno == -1)
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{
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first_regno = 0;
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last_regno = NUM_REGS - 1;
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}
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else
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{
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first_regno = regno;
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last_regno = regno;
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}
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for (regno = first_regno; regno <= last_regno; regno++)
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{
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if (regmap[regno] == -1)
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child_ops.to_store_registers (regno);
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else
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{
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unsigned char buf[MAX_REGISTER_RAW_SIZE];
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CORE_ADDR sp;
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sp = (CORE_ADDR) tcb_ptr->static_ctx.sp - 160;
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if (regno == FLAGS_REGNUM)
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child_ops.to_store_registers (regno); /* Let lower layer handle this... */
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else if (regno == SP_REGNUM)
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{
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write_memory ((CORE_ADDR) & tcb_ptr->static_ctx.sp,
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registers + REGISTER_BYTE (regno),
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REGISTER_RAW_SIZE (regno));
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tcb_ptr->static_ctx.sp = (cma__t_hppa_regs *)
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(extract_address (registers + REGISTER_BYTE (regno), REGISTER_RAW_SIZE (regno)) + 160);
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}
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else if (regno == PC_REGNUM)
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write_memory (sp - 20,
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registers + REGISTER_BYTE (regno),
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REGISTER_RAW_SIZE (regno));
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else
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write_memory (sp + regmap[regno],
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registers + REGISTER_BYTE (regno),
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REGISTER_RAW_SIZE (regno));
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}
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}
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do_cleanups (old_chain);
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}
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/* Get ready to modify the registers array. On machines which store
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individual registers, this doesn't need to do anything. On machines
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which store all the registers in one fell swoop, this makes sure
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that registers contains all the registers from the program being
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debugged. */
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static void
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hpux_thread_prepare_to_store (void)
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{
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child_ops.to_prepare_to_store ();
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}
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static int
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hpux_thread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
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int dowrite, struct mem_attrib *attribs,
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struct target_ops *target)
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{
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int retval;
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struct cleanup *old_chain;
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old_chain = save_inferior_ptid ();
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inferior_ptid = main_ptid;
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retval =
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child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, attribs, target);
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do_cleanups (old_chain);
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return retval;
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}
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/* Print status information about what we're accessing. */
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static void
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hpux_thread_files_info (struct target_ops *ignore)
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{
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child_ops.to_files_info (ignore);
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}
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static void
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hpux_thread_kill_inferior (void)
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{
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child_ops.to_kill ();
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}
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static void
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hpux_thread_notice_signals (ptid_t ptid)
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{
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child_ops.to_notice_signals (ptid);
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}
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/* Fork an inferior process, and start debugging it with /proc. */
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static void
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hpux_thread_create_inferior (char *exec_file, char *allargs, char **env)
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{
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child_ops.to_create_inferior (exec_file, allargs, env);
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if (hpux_thread_active)
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{
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main_ptid = inferior_ptid;
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push_target (&hpux_thread_ops);
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inferior_ptid = find_active_thread ();
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add_thread (inferior_ptid);
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}
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}
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/* This routine is called whenever a new symbol table is read in, or when all
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symbol tables are removed. libthread_db can only be initialized when it
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finds the right variables in libthread.so. Since it's a shared library,
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those variables don't show up until the library gets mapped and the symbol
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table is read in. */
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/* This new_objfile event is now managed by a chained function pointer.
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* It is the callee's responsability to call the next client on the chain.
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*/
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/* Saved pointer to previous owner of the new_objfile event. */
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static void (*target_new_objfile_chain) (struct objfile *);
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void
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hpux_thread_new_objfile (struct objfile *objfile)
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{
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struct minimal_symbol *ms;
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if (!objfile)
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{
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hpux_thread_active = 0;
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goto quit;
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}
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ms = lookup_minimal_symbol ("cma__g_known_threads", NULL, objfile);
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if (!ms)
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goto quit;
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P_cma__g_known_threads = SYMBOL_VALUE_ADDRESS (ms);
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ms = lookup_minimal_symbol ("cma__g_current_thread", NULL, objfile);
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if (!ms)
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goto quit;
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P_cma__g_current_thread = SYMBOL_VALUE_ADDRESS (ms);
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hpux_thread_active = 1;
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quit:
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/* Call predecessor on chain, if any. */
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if (target_new_objfile_chain)
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target_new_objfile_chain (objfile);
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}
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/* Clean up after the inferior dies. */
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static void
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hpux_thread_mourn_inferior (void)
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{
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child_ops.to_mourn_inferior ();
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}
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/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
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static int
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hpux_thread_can_run (void)
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{
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return child_suppress_run;
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}
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static int
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hpux_thread_alive (ptid_t ptid)
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{
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return 1;
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}
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static void
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hpux_thread_stop (void)
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{
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child_ops.to_stop ();
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}
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/* Convert a pid to printable form. */
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char *
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hpux_pid_to_str (ptid_t ptid)
|
||
{
|
||
static char buf[100];
|
||
int pid = PIDGET (ptid);
|
||
|
||
sprintf (buf, "Thread %ld", ptid_get_tid (ptid));
|
||
|
||
return buf;
|
||
}
|
||
|
||
static void
|
||
init_hpux_thread_ops (void)
|
||
{
|
||
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_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 (void)
|
||
{
|
||
init_hpux_thread_ops ();
|
||
add_target (&hpux_thread_ops);
|
||
|
||
child_suppress_run = 1;
|
||
/* Hook into new_objfile notification. */
|
||
target_new_objfile_chain = target_new_objfile_hook;
|
||
target_new_objfile_hook = hpux_thread_new_objfile;
|
||
}
|