Share some Windows-related globals
This moves some Windows-related globals into nat/windows-nat.c, sharing them between gdb and gdbserver. gdb/ChangeLog 2020-04-08 Tom Tromey <tromey@adacore.com> * windows-nat.c (current_process_handle, current_process_id) (main_thread_id, last_sig, current_event, last_wait_event) (current_windows_thread, desired_stop_thread_id, pending_stops) (struct pending_stop, siginfo_er): Move to nat/windows-nat.c. (display_selectors, fake_create_process) (get_windows_debug_event): Update. * nat/windows-nat.h (current_process_handle, current_process_id) (main_thread_id, last_sig, current_event, last_wait_event) (current_windows_thread, desired_stop_thread_id, pending_stops) (struct pending_stop, siginfo_er): Move from windows-nat.c. * nat/windows-nat.c (current_process_handle, current_process_id) (main_thread_id, last_sig, current_event, last_wait_event) (current_windows_thread, desired_stop_thread_id, pending_stops) (siginfo_er): New globals. Move from windows-nat.c. gdbserver/ChangeLog 2020-04-08 Tom Tromey <tromey@adacore.com> * win32-low.c (current_process_handle, current_process_id) (main_thread_id, last_sig, current_event, siginfo_er): Move to nat/windows-nat.c.
This commit is contained in:
Tom Tromey
parent
9d8679cc71
commit
3c76026df8
6 changed files with 130 additions and 96 deletions
|
|
@ -244,28 +244,8 @@ static CORE_ADDR cygwin_get_dr (int i);
|
|||
static unsigned long cygwin_get_dr6 (void);
|
||||
static unsigned long cygwin_get_dr7 (void);
|
||||
|
||||
static enum gdb_signal last_sig = GDB_SIGNAL_0;
|
||||
/* Set if a signal was received from the debugged process. */
|
||||
|
||||
static std::vector<windows_thread_info *> thread_list;
|
||||
|
||||
/* The process and thread handles for the above context. */
|
||||
|
||||
/* The current debug event from WaitForDebugEvent or from a pending
|
||||
stop. */
|
||||
static DEBUG_EVENT current_event;
|
||||
|
||||
/* The most recent event from WaitForDebugEvent. Unlike
|
||||
current_event, this is guaranteed never to come from a pending
|
||||
stop. This is important because only data from the most recent
|
||||
event from WaitForDebugEvent can be used when calling
|
||||
ContinueDebugEvent. */
|
||||
static DEBUG_EVENT last_wait_event;
|
||||
|
||||
static HANDLE current_process_handle; /* Currently executing process */
|
||||
static windows_thread_info *current_thread; /* Info on currently selected thread */
|
||||
static EXCEPTION_RECORD siginfo_er; /* Contents of $_siginfo */
|
||||
|
||||
/* Counts of things. */
|
||||
static int exception_count = 0;
|
||||
static int event_count = 0;
|
||||
|
|
@ -336,37 +316,6 @@ static const struct xlate_exception xlate[] =
|
|||
|
||||
#endif /* 0 */
|
||||
|
||||
/* The ID of the thread for which we anticipate a stop event.
|
||||
Normally this is -1, meaning we'll accept an event in any
|
||||
thread. */
|
||||
static DWORD desired_stop_thread_id = -1;
|
||||
|
||||
/* A single pending stop. See "pending_stops" for more
|
||||
information. */
|
||||
struct pending_stop
|
||||
{
|
||||
/* The thread id. */
|
||||
DWORD thread_id;
|
||||
|
||||
/* The target waitstatus we computed. */
|
||||
target_waitstatus status;
|
||||
|
||||
/* The event. A few fields of this can be referenced after a stop,
|
||||
and it seemed simplest to store the entire event. */
|
||||
DEBUG_EVENT event;
|
||||
};
|
||||
|
||||
/* A vector of pending stops. Sometimes, Windows will report a stop
|
||||
on a thread that has been ostensibly suspended. We believe what
|
||||
happens here is that two threads hit a breakpoint simultaneously,
|
||||
and the Windows kernel queues the stop events. However, this can
|
||||
result in the strange effect of trying to single step thread A --
|
||||
leaving all other threads suspended -- and then seeing a stop in
|
||||
thread B. To handle this scenario, we queue all such "pending"
|
||||
stops here, and then process them once the step has completed. See
|
||||
PR gdb/22992. */
|
||||
static std::vector<pending_stop> pending_stops;
|
||||
|
||||
struct windows_nat_target final : public x86_nat_target<inf_child_target>
|
||||
{
|
||||
void close () override;
|
||||
|
|
@ -387,7 +336,7 @@ struct windows_nat_target final : public x86_nat_target<inf_child_target>
|
|||
|
||||
bool stopped_by_sw_breakpoint () override
|
||||
{
|
||||
return current_thread->stopped_at_software_breakpoint;
|
||||
return current_windows_thread->stopped_at_software_breakpoint;
|
||||
}
|
||||
|
||||
bool supports_stopped_by_sw_breakpoint () override
|
||||
|
|
@ -1207,7 +1156,7 @@ display_selector (HANDLE thread, DWORD sel)
|
|||
static void
|
||||
display_selectors (const char * args, int from_tty)
|
||||
{
|
||||
if (!current_thread)
|
||||
if (!current_windows_thread)
|
||||
{
|
||||
puts_filtered ("Impossible to display selectors now.\n");
|
||||
return;
|
||||
|
|
@ -1218,45 +1167,45 @@ display_selectors (const char * args, int from_tty)
|
|||
if (wow64_process)
|
||||
{
|
||||
puts_filtered ("Selector $cs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegCs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegCs);
|
||||
puts_filtered ("Selector $ds\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegDs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegDs);
|
||||
puts_filtered ("Selector $es\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegEs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegEs);
|
||||
puts_filtered ("Selector $ss\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegSs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegSs);
|
||||
puts_filtered ("Selector $fs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegFs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegFs);
|
||||
puts_filtered ("Selector $gs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->wow64_context.SegGs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->wow64_context.SegGs);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
puts_filtered ("Selector $cs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegCs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegCs);
|
||||
puts_filtered ("Selector $ds\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegDs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegDs);
|
||||
puts_filtered ("Selector $es\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegEs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegEs);
|
||||
puts_filtered ("Selector $ss\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegSs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegSs);
|
||||
puts_filtered ("Selector $fs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegFs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegFs);
|
||||
puts_filtered ("Selector $gs\n");
|
||||
display_selector (current_thread->h,
|
||||
current_thread->context.SegGs);
|
||||
display_selector (current_windows_thread->h,
|
||||
current_windows_thread->context.SegGs);
|
||||
}
|
||||
}
|
||||
else
|
||||
|
|
@ -1264,7 +1213,7 @@ display_selectors (const char * args, int from_tty)
|
|||
int sel;
|
||||
sel = parse_and_eval_long (args);
|
||||
printf_filtered ("Selector \"%s\"\n",args);
|
||||
display_selector (current_thread->h, sel);
|
||||
display_selector (current_windows_thread->h, sel);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1587,7 +1536,7 @@ fake_create_process (void)
|
|||
(unsigned) GetLastError ());
|
||||
/* We can not debug anything in that case. */
|
||||
}
|
||||
current_thread
|
||||
current_windows_thread
|
||||
= windows_add_thread (ptid_t (current_event.dwProcessId,
|
||||
current_event.dwThreadId, 0),
|
||||
current_event.u.CreateThread.hThread,
|
||||
|
|
@ -1782,8 +1731,9 @@ windows_nat_target::get_windows_debug_event (int pid,
|
|||
current_event = iter->event;
|
||||
|
||||
inferior_ptid = ptid_t (current_event.dwProcessId, thread_id, 0);
|
||||
current_thread = thread_rec (inferior_ptid, INVALIDATE_CONTEXT);
|
||||
current_thread->reload_context = 1;
|
||||
current_windows_thread = thread_rec (inferior_ptid,
|
||||
INVALIDATE_CONTEXT);
|
||||
current_windows_thread->reload_context = 1;
|
||||
|
||||
DEBUG_EVENTS (("get_windows_debug_event - "
|
||||
"pending stop found in 0x%x (desired=0x%x)\n",
|
||||
|
|
@ -2006,9 +1956,10 @@ windows_nat_target::get_windows_debug_event (int pid,
|
|||
else
|
||||
{
|
||||
inferior_ptid = ptid_t (current_event.dwProcessId, thread_id, 0);
|
||||
current_thread = th;
|
||||
if (!current_thread)
|
||||
current_thread = thread_rec (inferior_ptid, INVALIDATE_CONTEXT);
|
||||
current_windows_thread = th;
|
||||
if (!current_windows_thread)
|
||||
current_windows_thread = thread_rec (inferior_ptid,
|
||||
INVALIDATE_CONTEXT);
|
||||
}
|
||||
|
||||
out:
|
||||
|
|
@ -2066,14 +2017,14 @@ windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|||
{
|
||||
ptid_t result = ptid_t (current_event.dwProcessId, retval, 0);
|
||||
|
||||
if (current_thread != nullptr)
|
||||
if (current_windows_thread != nullptr)
|
||||
{
|
||||
current_thread->stopped_at_software_breakpoint = false;
|
||||
current_windows_thread->stopped_at_software_breakpoint = false;
|
||||
if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT
|
||||
&& (current_event.u.Exception.ExceptionRecord.ExceptionCode
|
||||
== EXCEPTION_BREAKPOINT)
|
||||
&& windows_initialization_done)
|
||||
current_thread->stopped_at_software_breakpoint = true;
|
||||
current_windows_thread->stopped_at_software_breakpoint = true;
|
||||
}
|
||||
|
||||
return result;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue