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PR gdb/15911: "info threads" changes the default source and line (for "break", "list")
"info threads" changes the default source for "break" and "list", to
whatever the location of the first/bottom thread in the thread list
is...
(gdb) b start
(gdb) c
...
(gdb) list
*lists "start"*
(gdb) b 23
Breakpoint 3 at 0x400614: file test.c, line 23.
(gdb) info threads
Id Target Id Frame
* 2 Thread 0x7ffff7fcb700 (LWP 1760) "test" start (arg=0x0) at test.c:23
1 Thread 0x7ffff7fcc740 (LWP 1748) "test" 0x000000323dc08e60 in pthread_join (threadid=140737353922304, thread_return=0x0) at pthread_join.c:93
(gdb) b 23
Breakpoint 4 at 0x323dc08d90: file pthread_join.c, line 23.
^^^^^^^^^^^^^^^
(gdb) list
93 lll_wait_tid (pd->tid);
94
95
96 /* Restore cancellation mode. */
97 CANCEL_RESET (oldtype);
98
99 /* Remove the handler. */
100 pthread_cleanup_pop (0);
101
102
The issue is that print_stack_frame always sets the current sal to the
frame's sal. print_frame_info (which print_stack_frame calls to do
most of the work) also sets the last displayed sal, but only if
print_what isn't LOCATION. Now the call in question, from within
thread.c:print_thread_info, does pass in LOCATION as print_what, but
print_stack_frame doesn't have the same check print_frame_info has.
We could consider adding it, but setting these globals depending on
print_what isn't very clean, IMO. What we have is two logically
distinct operations mixed in the same function(s):
#1 - print frame, in the format specified by {print_what,
print_level and print_args}.
#2 - We're displaying a frame to the user, and I want the default
sal to point here, because the program stopped here, or the user
did some context-changing command (up, down, etc.).
So I added a new parameter to print_stack_frame & friends for point
#2, and went through all calls in the tree adjusting as necessary.
Tested on x86_64 Fedora 17.
gdb/
2013-09-17 Pedro Alves <palves@redhat.com>
PR gdb/15911
* ada-tasks.c (task_command_1): Adjust call to print_stack_frame.
* bsd-kvm.c (bsd_kvm_open, bsd_kvm_proc_cmd, bsd_kvm_pcb_cmd):
* corelow.c (core_open):
* frame.h (print_stack_frame, print_frame_info): New
'set_current_sal' parameter.
* infcmd.c (finish_command, kill_command): Adjust call to
print_stack_frame.
* inferior.c (inferior_command): Likewise.
* infrun.c (normal_stop): Likewise.
* linux-fork.c (linux_fork_context): Likewise.
* record-full.c (record_full_goto_entry, record_full_restore):
Likewise.
* remote-mips.c (common_open): Likewise.
* stack.c (print_stack_frame): New 'set_current_sal' parameter.
Use it.
(print_frame_info): New 'set_current_sal' parameter. Set the last
displayed sal depending on the new paremeter instead of looking at
print_what.
(backtrace_command_1, select_and_print_frame, frame_command)
(current_frame_command, up_command, down_command): Adjust call to
print_stack_frame.
* thread.c (print_thread_info, restore_selected_frame)
(do_captured_thread_select): Adjust call to print_stack_frame.
* tracepoint.c (tfind_1): Likewise.
* mi/mi-cmd-stack.c (mi_cmd_stack_list_frames)
(mi_cmd_stack_info_frame): Likewise.
* mi/mi-interp.c (mi_on_normal_stop): Likewise.
* mi/mi-main.c (mi_cmd_exec_return, mi_cmd_trace_find): Likewise.
gdb/testsuite/
* gdb.threads/info-threads-cur-sal-2.c: New file.
* gdb.threads/info-threads-cur-sal.c: New file.
* gdb.threads/info-threads-cur-sal.exp: New file.
This commit is contained in:
Pedro Alves
26
gdb/stack.c
26
gdb/stack.c
@ -154,7 +154,8 @@ frame_show_address (struct frame_info *frame,
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void
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print_stack_frame (struct frame_info *frame, int print_level,
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enum print_what print_what)
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enum print_what print_what,
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int set_current_sal)
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{
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volatile struct gdb_exception e;
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@ -166,8 +167,10 @@ print_stack_frame (struct frame_info *frame, int print_level,
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{
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int center = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
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print_frame_info (frame, print_level, print_what, 1 /* print_args */);
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set_current_sal_from_frame (frame, center);
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print_frame_info (frame, print_level, print_what, 1 /* print_args */,
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set_current_sal);
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if (set_current_sal)
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set_current_sal_from_frame (frame, center);
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}
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}
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@ -780,7 +783,8 @@ do_gdb_disassembly (struct gdbarch *gdbarch,
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void
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print_frame_info (struct frame_info *frame, int print_level,
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enum print_what print_what, int print_args)
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enum print_what print_what, int print_args,
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int set_current_sal)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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struct symtab_and_line sal;
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@ -905,7 +909,7 @@ print_frame_info (struct frame_info *frame, int print_level,
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do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end);
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}
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if (print_what != LOCATION)
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if (set_current_sal)
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{
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CORE_ADDR pc;
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@ -1787,7 +1791,7 @@ backtrace_command_1 (char *count_exp, int show_locals, int no_filters,
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hand, perhaps the code does or could be fixed to make sure
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the frame->prev field gets set to NULL in that case). */
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print_frame_info (fi, 1, LOCATION, 1);
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print_frame_info (fi, 1, LOCATION, 1, 0);
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if (show_locals)
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{
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struct frame_id frame_id = get_frame_id (fi);
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@ -2184,7 +2188,7 @@ select_and_print_frame (struct frame_info *frame)
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{
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select_frame (frame);
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if (frame)
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print_stack_frame (frame, 1, SRC_AND_LOC);
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print_stack_frame (frame, 1, SRC_AND_LOC, 1);
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}
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/* Return the symbol-block in which the selected frame is executing.
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@ -2262,7 +2266,7 @@ static void
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frame_command (char *level_exp, int from_tty)
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{
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select_frame_command (level_exp, from_tty);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
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}
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/* The XDB Compatibility command to print the current frame. */
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@ -2270,7 +2274,7 @@ frame_command (char *level_exp, int from_tty)
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static void
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current_frame_command (char *level_exp, int from_tty)
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{
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print_stack_frame (get_selected_frame (_("No stack.")), 1, SRC_AND_LOC);
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print_stack_frame (get_selected_frame (_("No stack.")), 1, SRC_AND_LOC, 1);
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}
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/* Select the frame up one or COUNT_EXP stack levels from the
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@ -2301,7 +2305,7 @@ static void
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up_command (char *count_exp, int from_tty)
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{
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up_silently_base (count_exp);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
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}
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/* Select the frame down one or COUNT_EXP stack levels from the previously
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@ -2340,7 +2344,7 @@ static void
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down_command (char *count_exp, int from_tty)
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{
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down_silently_base (count_exp);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
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print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
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}
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