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-rw-r--r--gdb/hpux-thread.c641
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diff --git a/gdb/hpux-thread.c b/gdb/hpux-thread.c
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+/* 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;
+}