/* Low-level child interface to ttrace.
- Copyright (C) 2004-2012 Free Software Foundation, Inc.
+ Copyright (C) 2004-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "terminal.h"
#include "target.h"
-
-#include "gdb_assert.h"
-#include "gdb_string.h"
#include <sys/mman.h>
#include <sys/ttrace.h>
#include <signal.h>
#include "inf-child.h"
#include "inf-ttrace.h"
+#include "common/filestuff.h"
\f
addr, 0, (uintptr_t)&prot) == -1)
perror_with_name (("ttrace"));
- page = XMALLOC (struct inf_ttrace_page);
+ page = XNEW (struct inf_ttrace_page);
page->addr = addr;
page->prot = prot;
page->refcount = 0;
type TYPE. */
static int
-inf_ttrace_insert_watchpoint (CORE_ADDR addr, int len, int type,
+inf_ttrace_insert_watchpoint (struct target_ops *self,
+ CORE_ADDR addr, int len, int type,
struct expression *cond)
{
const int pagesize = inf_ttrace_page_dict.pagesize;
type TYPE. */
static int
-inf_ttrace_remove_watchpoint (CORE_ADDR addr, int len, int type,
+inf_ttrace_remove_watchpoint (struct target_ops *self,
+ CORE_ADDR addr, int len, int type,
struct expression *cond)
{
const int pagesize = inf_ttrace_page_dict.pagesize;
}
static int
-inf_ttrace_can_use_hw_breakpoint (int type, int len, int ot)
+inf_ttrace_can_use_hw_breakpoint (struct target_ops *self,
+ int type, int len, int ot)
{
return (type == bp_hardware_watchpoint);
}
static int
-inf_ttrace_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
+inf_ttrace_region_ok_for_hw_watchpoint (struct target_ops *self,
+ CORE_ADDR addr, int len)
{
return 1;
}
by hitting a "hardware" watchpoint. */
static int
-inf_ttrace_stopped_by_watchpoint (void)
+inf_ttrace_stopped_by_watchpoint (struct target_ops *ops)
{
pid_t pid = ptid_get_pid (inferior_ptid);
lwpid_t lwpid = ptid_get_lwp (inferior_ptid);
}
\f
-/* When tracking a vfork(2), we cannot detach from the parent until
- after the child has called exec(3) or has exited. If we are still
- attached to the parent, this variable will be set to the process ID
- of the parent. Otherwise it will be set to zero. */
-static pid_t inf_ttrace_vfork_ppid = -1;
+/* Target hook for follow_fork. On entry and at return inferior_ptid
+ is the ptid of the followed inferior. */
static int
-inf_ttrace_follow_fork (struct target_ops *ops, int follow_child)
+inf_ttrace_follow_fork (struct target_ops *ops, int follow_child,
+ int detach_fork)
{
- pid_t pid, fpid;
- lwpid_t lwpid, flwpid;
- ttstate_t tts;
struct thread_info *tp = inferior_thread ();
gdb_assert (tp->pending_follow.kind == TARGET_WAITKIND_FORKED
|| tp->pending_follow.kind == TARGET_WAITKIND_VFORKED);
- pid = ptid_get_pid (inferior_ptid);
- lwpid = ptid_get_lwp (inferior_ptid);
-
- /* Get all important details that core GDB doesn't (and shouldn't)
- know about. */
- if (ttrace (TT_LWP_GET_STATE, pid, lwpid,
- (uintptr_t)&tts, sizeof tts, 0) == -1)
- perror_with_name (("ttrace"));
-
- gdb_assert (tts.tts_event == TTEVT_FORK || tts.tts_event == TTEVT_VFORK);
-
- if (tts.tts_u.tts_fork.tts_isparent)
- {
- pid = tts.tts_pid;
- lwpid = tts.tts_lwpid;
- fpid = tts.tts_u.tts_fork.tts_fpid;
- flwpid = tts.tts_u.tts_fork.tts_flwpid;
- }
- else
- {
- pid = tts.tts_u.tts_fork.tts_fpid;
- lwpid = tts.tts_u.tts_fork.tts_flwpid;
- fpid = tts.tts_pid;
- flwpid = tts.tts_lwpid;
- }
-
- if (follow_child)
- {
- struct inferior *inf;
- struct inferior *parent_inf;
-
- parent_inf = find_inferior_pid (pid);
-
- inferior_ptid = ptid_build (fpid, flwpid, 0);
- inf = add_inferior (fpid);
- inf->attach_flag = parent_inf->attach_flag;
- inf->pspace = parent_inf->pspace;
- inf->aspace = parent_inf->aspace;
- copy_terminal_info (inf, parent_inf);
- detach_breakpoints (pid);
-
- target_terminal_ours ();
- fprintf_unfiltered (gdb_stdlog,
- _("Attaching after fork to child process %ld.\n"),
- (long)fpid);
- }
- else
- {
- inferior_ptid = ptid_build (pid, lwpid, 0);
- detach_breakpoints (fpid);
-
- target_terminal_ours ();
- fprintf_unfiltered (gdb_stdlog,
- _("Detaching after fork from child process %ld.\n"),
- (long)fpid);
- }
-
- if (tts.tts_event == TTEVT_VFORK)
- {
- gdb_assert (!tts.tts_u.tts_fork.tts_isparent);
-
- if (follow_child)
- {
- /* We can't detach from the parent yet. */
- inf_ttrace_vfork_ppid = pid;
-
- reattach_breakpoints (fpid);
- }
- else
- {
- if (ttrace (TT_PROC_DETACH, fpid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
-
- /* Wait till we get the TTEVT_VFORK event in the parent.
- This indicates that the child has called exec(3) or has
- exited and that the parent is ready to be traced again. */
- if (ttrace_wait (pid, lwpid, TTRACE_WAITOK, &tts, sizeof tts) == -1)
- perror_with_name (("ttrace_wait"));
- gdb_assert (tts.tts_event == TTEVT_VFORK);
- gdb_assert (tts.tts_u.tts_fork.tts_isparent);
-
- reattach_breakpoints (pid);
- }
- }
- else
- {
- gdb_assert (tts.tts_u.tts_fork.tts_isparent);
-
- if (follow_child)
- {
- if (ttrace (TT_PROC_DETACH, pid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
- }
- else
- {
- if (ttrace (TT_PROC_DETACH, fpid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
- }
- }
-
if (follow_child)
{
struct thread_info *ti;
inf_ttrace_num_lwps = 1;
inf_ttrace_num_lwps_in_syscall = 0;
- /* Delete parent. */
- delete_thread_silent (ptid_build (pid, lwpid, 0));
- detach_inferior (pid);
-
- /* Add child thread. inferior_ptid was already set above. */
- ti = add_thread_silent (inferior_ptid);
+ ti = inferior_thread ();
ti->private =
xmalloc (sizeof (struct inf_ttrace_private_thread_info));
memset (ti->private, 0,
sizeof (struct inf_ttrace_private_thread_info));
}
+ else
+ {
+ pid_t child_pid;
+
+ /* Following parent. Detach child now. */
+ child_pid = ptid_get_pid (tp->pending_follow.value.related_pid);
+ if (ttrace (TT_PROC_DETACH, child_pid, 0, 0, 0, 0) == -1)
+ perror_with_name (("ttrace"));
+ }
return 0;
}
close (inf_ttrace_pfd1[1]);
close (inf_ttrace_pfd2[0]);
close (inf_ttrace_pfd2[1]);
+
+ unmark_fd_no_cloexec (inf_ttrace_pfd1[0]);
+ unmark_fd_no_cloexec (inf_ttrace_pfd1[1]);
+ unmark_fd_no_cloexec (inf_ttrace_pfd2[0]);
+ unmark_fd_no_cloexec (inf_ttrace_pfd2[1]);
}
static void
close (inf_ttrace_pfd2[0]);
perror_with_name (("pipe"));
}
+
+ mark_fd_no_cloexec (inf_ttrace_pfd1[0]);
+ mark_fd_no_cloexec (inf_ttrace_pfd1[1]);
+ mark_fd_no_cloexec (inf_ttrace_pfd2[0]);
+ mark_fd_no_cloexec (inf_ttrace_pfd2[1]);
}
/* Prepare to be traced. */
do_cleanups (old_chain);
- push_target (ops);
+ if (!target_is_pushed (ops))
+ push_target (ops);
- /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
- be 1 or 2 depending on whether we're starting without or with a
- shell. */
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
gdb_assert (inf_ttrace_num_lwps_in_syscall == 0);
gdb_assert (inf_ttrace_page_dict.count == 0);
gdb_assert (inf_ttrace_reenable_page_protections == 0);
- gdb_assert (inf_ttrace_vfork_ppid == -1);
pid = fork_inferior (exec_file, allargs, env, inf_ttrace_me, NULL,
inf_ttrace_prepare, NULL, NULL);
}
inf_ttrace_page_dict.count = 0;
- unpush_target (ops);
- generic_mourn_inferior ();
+ inf_child_mourn_inferior (ops);
}
/* Assuming we just attached the debugger to a new inferior, create
}
static void
-inf_ttrace_attach (struct target_ops *ops, char *args, int from_tty)
+inf_ttrace_attach (struct target_ops *ops, const char *args, int from_tty)
{
char *exec_file;
pid_t pid;
gdb_assert (inf_ttrace_num_lwps == 0);
gdb_assert (inf_ttrace_num_lwps_in_syscall == 0);
- gdb_assert (inf_ttrace_vfork_ppid == -1);
if (ttrace (TT_PROC_ATTACH, pid, 0, TT_KILL_ON_EXIT, TT_VERSION, 0) == -1)
perror_with_name (("ttrace"));
(uintptr_t)&tte, sizeof tte, 0) == -1)
perror_with_name (("ttrace"));
- push_target (ops);
+ if (!target_is_pushed (ops))
+ push_target (ops);
inf_ttrace_create_threads_after_attach (pid);
}
static void
-inf_ttrace_detach (struct target_ops *ops, char *args, int from_tty)
+inf_ttrace_detach (struct target_ops *ops, const char *args, int from_tty)
{
pid_t pid = ptid_get_pid (inferior_ptid);
int sig = 0;
if (ttrace (TT_PROC_DETACH, pid, 0, 0, sig, 0) == -1)
perror_with_name (("ttrace"));
- if (inf_ttrace_vfork_ppid != -1)
- {
- if (ttrace (TT_PROC_DETACH, inf_ttrace_vfork_ppid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
- inf_ttrace_vfork_ppid = -1;
- }
-
inf_ttrace_num_lwps = 0;
inf_ttrace_num_lwps_in_syscall = 0;
inferior_ptid = null_ptid;
detach_inferior (pid);
- unpush_target (ops);
+ inf_child_maybe_unpush_target (ops);
}
static void
perror_with_name (("ttrace"));
/* ??? Is it necessary to call ttrace_wait() here? */
- if (inf_ttrace_vfork_ppid != -1)
- {
- if (ttrace (TT_PROC_DETACH, inf_ttrace_vfork_ppid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
- inf_ttrace_vfork_ppid = -1;
- }
-
target_mourn_inferior ();
}
if (ttrace_wait (pid, lwpid, TTRACE_WAITOK, &tts, sizeof tts) == -1)
perror_with_name (("ttrace_wait"));
- if (tts.tts_event == TTEVT_VFORK && tts.tts_u.tts_fork.tts_isparent)
- {
- if (inf_ttrace_vfork_ppid != -1)
- {
- gdb_assert (inf_ttrace_vfork_ppid == tts.tts_pid);
-
- if (ttrace (TT_PROC_DETACH, tts.tts_pid, 0, 0, 0, 0) == -1)
- perror_with_name (("ttrace"));
- inf_ttrace_vfork_ppid = -1;
- }
-
- tts.tts_event = TTEVT_NONE;
- }
-
clear_sigint_trap ();
}
while (tts.tts_event == TTEVT_NONE);
case TTEVT_BPT_SSTEP:
/* Make it look like a breakpoint. */
ourstatus->kind = TARGET_WAITKIND_STOPPED;
- ourstatus->value.sig = TARGET_SIGNAL_TRAP;
+ ourstatus->value.sig = GDB_SIGNAL_TRAP;
break;
#endif
break;
case TTEVT_VFORK:
- gdb_assert (!tts.tts_u.tts_fork.tts_isparent);
-
- related_ptid = ptid_build (tts.tts_u.tts_fork.tts_fpid,
- tts.tts_u.tts_fork.tts_flwpid, 0);
-
- ourstatus->kind = TARGET_WAITKIND_VFORKED;
- ourstatus->value.related_pid = related_ptid;
+ if (tts.tts_u.tts_fork.tts_isparent)
+ ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
+ else
+ {
+ related_ptid = ptid_build (tts.tts_u.tts_fork.tts_fpid,
+ tts.tts_u.tts_fork.tts_flwpid, 0);
- /* HACK: To avoid touching the parent during the vfork, switch
- away from it. */
- inferior_ptid = ptid;
+ ourstatus->kind = TARGET_WAITKIND_VFORKED;
+ ourstatus->value.related_pid = related_ptid;
+ }
break;
case TTEVT_LWP_CREATE:
return len;
}
-static LONGEST
+static enum target_xfer_status
inf_ttrace_xfer_partial (struct target_ops *ops, enum target_object object,
const char *annex, gdb_byte *readbuf,
const gdb_byte *writebuf,
- ULONGEST offset, LONGEST len)
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
- return inf_ttrace_xfer_memory (offset, len, readbuf, writebuf);
+ {
+ LONGEST val = inf_ttrace_xfer_memory (offset, len, readbuf, writebuf);
+
+ if (val == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) val;
+ return TARGET_XFER_OK;
+ }
+ }
case TARGET_OBJECT_UNWIND_TABLE:
- return -1;
+ return TARGET_XFER_E_IO;
case TARGET_OBJECT_AUXV:
- return -1;
+ return TARGET_XFER_E_IO;
case TARGET_OBJECT_WCOOKIE:
- return -1;
+ return TARGET_XFER_E_IO;
default:
- return -1;
+ return TARGET_XFER_E_IO;
}
}
INFO. */
static char *
-inf_ttrace_extra_thread_info (struct thread_info *info)
+inf_ttrace_extra_thread_info (struct target_ops *self,
+ struct thread_info *info)
{
struct inf_ttrace_private_thread_info* private =
(struct inf_ttrace_private_thread_info *) info->private;
/* Implement the get_ada_task_ptid target_ops method. */
static ptid_t
-inf_ttrace_get_ada_task_ptid (long lwp, long thread)
+inf_ttrace_get_ada_task_ptid (struct target_ops *self, long lwp, long thread)
{
return ptid_build (ptid_get_pid (inferior_ptid), lwp, 0);
}
\f
/* Prevent warning from -Wmissing-prototypes. */
-void _initialize_hppa_hpux_nat (void);
+void _initialize_inf_ttrace (void);
void
_initialize_inf_ttrace (void)