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2012-03-02 Pedro Alves <palves@redhat.com> 

* inferiors.c (add_pid_to_list, pull_pid_from_list): Delete.
	* linux-low.c (struct simple_pid_list): New.
	(stopped_pids): New a struct simple_pid_list pointer.
	(add_to_pid_list, pull_pid_from_list): New.
	(handle_extended_wait): Don't assume the first signal new children
	report is SIGSTOP.  Adjust call to pull_pid_from_list.
	(linux_wait_for_lwp): Adjust.
This commit is contained in:
Pedro Alves 2012-03-02 16:23:42 +00:00
parent b261e0c536
commit 0504465367
4 changed files with 60 additions and 38 deletions
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10
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,13 @@
2012-03-02 Pedro Alves <palves@redhat.com>
* inferiors.c (add_pid_to_list, pull_pid_from_list): Delete.
* linux-low.c (struct simple_pid_list): New.
(stopped_pids): New a struct simple_pid_list pointer.
(add_to_pid_list, pull_pid_from_list): New.
(handle_extended_wait): Don't assume the first signal new children
report is SIGSTOP. Adjust call to pull_pid_from_list.
(linux_wait_for_lwp): Adjust.
2012-03-02 Yao Qi <yao@codesourcery.com>
* tracepoint.c (do_action_at_tracepoint): Write `stop_pc' in

29
gdb/gdbserver/inferiors.c
View File

@ -239,35 +239,6 @@ clear_inferiors (void)
current_inferior = NULL;
}
/* Two utility functions for a truly degenerate inferior_list: a simple
PID listing. */
void
add_pid_to_list (struct inferior_list *list, unsigned long pid)
{
struct inferior_list_entry *new_entry;
new_entry = xmalloc (sizeof (struct inferior_list_entry));
new_entry->id = pid_to_ptid (pid);
add_inferior_to_list (list, new_entry);
}
int
pull_pid_from_list (struct inferior_list *list, unsigned long pid)
{
struct inferior_list_entry *new_entry;
new_entry = find_inferior_id (list, pid_to_ptid (pid));
if (new_entry == NULL)
return 0;
else
{
remove_inferior (list, new_entry);
free (new_entry);
return 1;
}
}
struct process_info *
add_process (int pid, int attached)
{

57
gdb/gdbserver/linux-low.c
View File

@ -92,11 +92,54 @@
struct inferior_list all_lwps;
/* A list of all unknown processes which receive stop signals. Some other
process will presumably claim each of these as forked children
momentarily. */
/* A list of all unknown processes which receive stop signals. Some
other process will presumably claim each of these as forked
children momentarily. */
struct inferior_list stopped_pids;
struct simple_pid_list
{
/* The process ID. */
int pid;
/* The status as reported by waitpid. */
int status;
/* Next in chain. */
struct simple_pid_list *next;
};
struct simple_pid_list *stopped_pids;
/* Trivial list manipulation functions to keep track of a list of new
stopped processes. */
static void
add_to_pid_list (struct simple_pid_list **listp, int pid, int status)
{
struct simple_pid_list *new_pid = xmalloc (sizeof (struct simple_pid_list));
new_pid->pid = pid;
new_pid->status = status;
new_pid->next = *listp;
*listp = new_pid;
}
static int
pull_pid_from_list (struct simple_pid_list **listp, int pid, int *statusp)
{
struct simple_pid_list **p;
for (p = listp; *p != NULL; p = &(*p)->next)
if ((*p)->pid == pid)
{
struct simple_pid_list *next = (*p)->next;
*statusp = (*p)->status;
xfree (*p);
*p = next;
return 1;
}
return 0;
}
/* FIXME this is a bit of a hack, and could be removed. */
int stopping_threads;
@ -353,12 +396,12 @@ handle_extended_wait (struct lwp_info *event_child, int wstat)
{
ptid_t ptid;
unsigned long new_pid;
int ret, status = W_STOPCODE (SIGSTOP);
int ret, status;
ptrace (PTRACE_GETEVENTMSG, lwpid_of (event_child), 0, &new_pid);
/* If we haven't already seen the new PID stop, wait for it now. */
if (! pull_pid_from_list (&stopped_pids, new_pid))
if (!pull_pid_from_list (&stopped_pids, new_pid, &status))
{
/* The new child has a pending SIGSTOP. We can't affect it until it
hits the SIGSTOP, but we're already attached. */
@ -1170,7 +1213,7 @@ retry:
was reported to us by the kernel. Save its PID. */
if (child == NULL && WIFSTOPPED (*wstatp))
{
add_pid_to_list (&stopped_pids, ret);
add_to_pid_list (&stopped_pids, ret, *wstatp);
goto retry;
}
else if (child == NULL)

2
gdb/gdbserver/server.h
View File

@ -279,8 +279,6 @@ void *inferior_target_data (struct thread_info *);
void set_inferior_target_data (struct thread_info *, void *);
void *inferior_regcache_data (struct thread_info *);
void set_inferior_regcache_data (struct thread_info *, void *);
void add_pid_to_list (struct inferior_list *list, unsigned long pid);
int pull_pid_from_list (struct inferior_list *list, unsigned long pid);
void loaded_dll (const char *name, CORE_ADDR base_addr);
void unloaded_dll (const char *name, CORE_ADDR base_addr);