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* win32-nat.c: Add some comments about below change.

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This commit is contained in:
Christopher Faylor
2003-12-26 14:56:45 +00:00
parent 3ade53336e
commit d6dc804979
3 changed files with 28 additions and 4 deletions
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4
gdb/ChangeLog
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@ -1,3 +1,7 @@
2003-12-26 Christopher Faylor <cgf@redhat.com>
* win32-nat.c: Add some comments about below change.
2003-12-25 Christopher Faylor <cgf@redhat.com> 2003-12-25 Christopher Faylor <cgf@redhat.com>
Fix for PR threads/1048 Fix for PR threads/1048

14
gdb/win32-nat.c
View File

@ -338,7 +338,8 @@ do_child_fetch_inferior_registers (int r)
long l; long l;
if (!current_thread) if (!current_thread)
return; return; /* Windows sometimes uses a non-existent thread id in its
events */
if (current_thread->reload_context) if (current_thread->reload_context)
{ {
@ -382,6 +383,8 @@ static void
child_fetch_inferior_registers (int r) child_fetch_inferior_registers (int r)
{ {
current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
/* Check if current_thread exists. Windows sometimes uses a non-existent
thread id in its events */
if (current_thread) if (current_thread)
do_child_fetch_inferior_registers (r); do_child_fetch_inferior_registers (r);
} }
@ -390,7 +393,7 @@ static void
do_child_store_inferior_registers (int r) do_child_store_inferior_registers (int r)
{ {
if (!current_thread) if (!current_thread)
/* nothing to do */; /* Windows sometimes uses a non-existent thread id in its events */;
else if (r >= 0) else if (r >= 0)
regcache_collect (r, ((char *) &current_thread->context) + mappings[r]); regcache_collect (r, ((char *) &current_thread->context) + mappings[r]);
else else
@ -405,6 +408,8 @@ static void
child_store_inferior_registers (int r) child_store_inferior_registers (int r)
{ {
current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
/* Check if current_thread exists. Windows sometimes uses a non-existent
thread id in its events */
if (current_thread) if (current_thread)
do_child_store_inferior_registers (r); do_child_store_inferior_registers (r);
} }
@ -1207,6 +1212,8 @@ child_continue (DWORD continue_status, int id)
return res; return res;
} }
/* Called in pathological case where Windows fails to send a
CREATE_PROCESS_DEBUG_EVENT after an attach. */
DWORD DWORD
fake_create_process () fake_create_process ()
{ {
@ -1253,6 +1260,9 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
{ {
if (!saw_create && attach_flag) if (!saw_create && attach_flag)
{ {
/* Kludge around a Windows bug where first event is a create
thread event. Caused when attached process does not have
a main thread. */
retval = ourstatus->value.related_pid = fake_create_process (); retval = ourstatus->value.related_pid = fake_create_process ();
saw_create++; saw_create++;
} }

14
gdb/windows-nat.c
View File

@ -338,7 +338,8 @@ do_child_fetch_inferior_registers (int r)
long l; long l;
if (!current_thread) if (!current_thread)
return; return; /* Windows sometimes uses a non-existent thread id in its
events */
if (current_thread->reload_context) if (current_thread->reload_context)
{ {
@ -382,6 +383,8 @@ static void
child_fetch_inferior_registers (int r) child_fetch_inferior_registers (int r)
{ {
current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
/* Check if current_thread exists. Windows sometimes uses a non-existent
thread id in its events */
if (current_thread) if (current_thread)
do_child_fetch_inferior_registers (r); do_child_fetch_inferior_registers (r);
} }
@ -390,7 +393,7 @@ static void
do_child_store_inferior_registers (int r) do_child_store_inferior_registers (int r)
{ {
if (!current_thread) if (!current_thread)
/* nothing to do */; /* Windows sometimes uses a non-existent thread id in its events */;
else if (r >= 0) else if (r >= 0)
regcache_collect (r, ((char *) &current_thread->context) + mappings[r]); regcache_collect (r, ((char *) &current_thread->context) + mappings[r]);
else else
@ -405,6 +408,8 @@ static void
child_store_inferior_registers (int r) child_store_inferior_registers (int r)
{ {
current_thread = thread_rec (PIDGET (inferior_ptid), TRUE); current_thread = thread_rec (PIDGET (inferior_ptid), TRUE);
/* Check if current_thread exists. Windows sometimes uses a non-existent
thread id in its events */
if (current_thread) if (current_thread)
do_child_store_inferior_registers (r); do_child_store_inferior_registers (r);
} }
@ -1207,6 +1212,8 @@ child_continue (DWORD continue_status, int id)
return res; return res;
} }
/* Called in pathological case where Windows fails to send a
CREATE_PROCESS_DEBUG_EVENT after an attach. */
DWORD DWORD
fake_create_process () fake_create_process ()
{ {
@ -1253,6 +1260,9 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
{ {
if (!saw_create && attach_flag) if (!saw_create && attach_flag)
{ {
/* Kludge around a Windows bug where first event is a create
thread event. Caused when attached process does not have
a main thread. */
retval = ourstatus->value.related_pid = fake_create_process (); retval = ourstatus->value.related_pid = fake_create_process ();
saw_create++; saw_create++;
} }