/* GNU/Linux native-dependent code for debugging multiple forks.
- Copyright (C) 2005-2014 Free Software Foundation, Inc.
+ Copyright (C) 2005-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "arch-utils.h"
#include "inferior.h"
+#include "infrun.h"
#include "regcache.h"
#include "gdbcmd.h"
#include "infcall.h"
#include "objfiles.h"
-#include "gdb_assert.h"
-#include <string.h>
#include "linux-fork.h"
#include "linux-nat.h"
#include "gdbthread.h"
#include "source.h"
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
#include "gdb_wait.h"
#include <dirent.h>
#include <ctype.h>
return (fork_list != NULL);
}
+/* Return the last fork in the list. */
+
+static struct fork_info *
+find_last_fork (void)
+{
+ struct fork_info *last;
+
+ if (fork_list == NULL)
+ return NULL;
+
+ for (last = fork_list; last->next != NULL; last = last->next)
+ ;
+ return last;
+}
+
/* Add a fork to the internal fork list. */
struct fork_info *
add_fork (ptid_get_pid (inferior_ptid)); /* safe recursion */
}
- fp = XZALLOC (struct fork_info);
+ fp = XCNEW (struct fork_info);
fp->ptid = ptid_build (pid, pid, 0);
fp->num = ++highest_fork_num;
- fp->next = fork_list;
- fork_list = fp;
+
+ if (fork_list == NULL)
+ fork_list = fp;
+ else
+ {
+ struct fork_info *last = find_last_fork ();
+
+ last->next = fp;
+ }
+
return fp;
}
fp->maxfd = tmp;
}
/* Allocate array of file positions. */
- fp->filepos = xrealloc (fp->filepos,
- (fp->maxfd + 1) * sizeof (*fp->filepos));
+ fp->filepos = XRESIZEVEC (off_t, fp->filepos, fp->maxfd + 1);
/* Initialize to -1 (invalid). */
for (tmp = 0; tmp <= fp->maxfd; tmp++)
void
linux_fork_mourn_inferior (void)
{
+ struct fork_info *last;
+ int status;
+
/* Wait just one more time to collect the inferior's exit status.
Do not check whether this succeeds though, since we may be
dealing with a process that we attached to. Such a process will
only report its exit status to its original parent. */
- int status;
-
waitpid (ptid_get_pid (inferior_ptid), &status, 0);
/* OK, presumably inferior_ptid is the one who has exited.
inferior_ptid yet. */
gdb_assert (fork_list);
- fork_load_infrun_state (fork_list);
+ last = find_last_fork ();
+ fork_load_infrun_state (last);
printf_filtered (_("[Switching to %s]\n"),
target_pid_to_str (inferior_ptid));
static void
inferior_call_waitpid_cleanup (void *fp)
{
- struct fork_info *oldfp = fp;
+ struct fork_info *oldfp = (struct fork_info *) fp;
if (oldfp)
{
old_cleanup = make_cleanup (inferior_call_waitpid_cleanup, oldfp);
/* Get the waitpid_fn. */
- if (lookup_minimal_symbol ("waitpid", NULL, NULL) != NULL)
+ if (lookup_minimal_symbol ("waitpid", NULL, NULL).minsym != NULL)
waitpid_fn = find_function_in_inferior ("waitpid", &waitpid_objf);
- if (!waitpid_fn && lookup_minimal_symbol ("_waitpid", NULL, NULL) != NULL)
+ if (!waitpid_fn
+ && lookup_minimal_symbol ("_waitpid", NULL, NULL).minsym != NULL)
waitpid_fn = find_function_in_inferior ("_waitpid", &waitpid_objf);
if (!waitpid_fn)
goto out;
msym = lookup_minimal_symbol_by_pc (pc);
if (msym.minsym)
- printf_filtered (", <%s>", SYMBOL_LINKAGE_NAME (msym.minsym));
+ printf_filtered (", <%s>", MSYMBOL_LINKAGE_NAME (msym.minsym));
}
putchar_filtered ('\n');
/* Make the inferior fork, record its (and gdb's) state. */
- if (lookup_minimal_symbol ("fork", NULL, NULL) != NULL)
+ if (lookup_minimal_symbol ("fork", NULL, NULL).minsym != NULL)
fork_fn = find_function_in_inferior ("fork", &fork_objf);
if (!fork_fn)
- if (lookup_minimal_symbol ("_fork", NULL, NULL) != NULL)
+ if (lookup_minimal_symbol ("_fork", NULL, NULL).minsym != NULL)
fork_fn = find_function_in_inferior ("fork", &fork_objf);
if (!fork_fn)
error (_("checkpoint: can't find fork function in inferior."));
retpid = value_as_long (ret);
get_last_target_status (&last_target_ptid, &last_target_waitstatus);
+
+ fp = find_fork_pid (retpid);
+
if (from_tty)
{
int parent_pid;
- printf_filtered (_("checkpoint: fork returned pid %ld.\n"),
- (long) retpid);
+ printf_filtered (_("checkpoint %d: fork returned pid %ld.\n"),
+ fp != NULL ? fp->num : -1, (long) retpid);
if (info_verbose)
{
parent_pid = ptid_get_lwp (last_target_ptid);
}
}
- fp = find_fork_pid (retpid);
if (!fp)
error (_("Failed to find new fork"));
fork_save_infrun_state (fp, 1);