2008-10-24 Hui Zhu <teawater@gmail.com>
Pedro Alves <pedro@codesourcery.com> * infrun.c (can_use_displaced_stepping): Change type to const char pointer. (can_use_displaced_stepping_auto): New string. (can_use_displaced_stepping_on): New string. (can_use_displaced_stepping_off): New string. (can_use_displaced_stepping_enum): New array. (show_can_use_displaced_stepping): In auto mode, also show the current effect of the option. (use_displaced_stepping): Return non-zero if displaced stepping is auto, and can be used with GDBARCH, and in non-stop mode. Return non-zero if displaced stepping is on, and can be used with GDBARCH. Return zero otherwise. (_initialize_infrun): Make the "set displaced-stepping" command an enum command. Change its class to class_run. Place it in the top level set list. Extend help to describe the auto mode. 2008-10-24 Hui Zhu <teawater@gmail.com> Pedro Alves <pedro@codesourcery.com> * gdb.texinfo (displaced-stepping): Describe the auto mode setting, and say it's the default. This is now a mainstream setting instead of a maintenance setting.
This commit is contained in:
Hui Zhu
parent
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@ -1,3 +1,23 @@
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2008-10-24 Hui Zhu <teawater@gmail.com>
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Pedro Alves <pedro@codesourcery.com>
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* infrun.c (can_use_displaced_stepping): Change type to
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const char pointer.
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(can_use_displaced_stepping_auto): New string.
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(can_use_displaced_stepping_on): New string.
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(can_use_displaced_stepping_off): New string.
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(can_use_displaced_stepping_enum): New array.
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(show_can_use_displaced_stepping): In auto mode, also show
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the current effect of the option.
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(use_displaced_stepping): Return non-zero if displaced
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stepping is auto, and can be used with GDBARCH, and in
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non-stop mode. Return non-zero if displaced stepping is on,
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and can be used with GDBARCH. Return zero otherwise.
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(_initialize_infrun): Make the "set displaced-stepping"
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command an enum command. Change its class to class_run.
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Place it in the top level set list. Extend help to describe
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the auto mode.
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2008-10-23 Pedro Alves <pedro@codesourcery.com>
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* defs.h: Mention ptid_is_pid.
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@ -1,3 +1,10 @@
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2008-10-24 Hui Zhu <teawater@gmail.com>
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Pedro Alves <pedro@codesourcery.com>
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* gdb.texinfo (displaced-stepping): Describe the auto mode
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setting, and say it's the default. This is now a mainstream
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setting instead of a maintenance setting.
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2008-10-23 Pedro Alves <pedro@codesourcery.com>
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* observer.texi (thread_stop_requested): New.
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@ -24296,18 +24296,33 @@ Shared library events.
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@end table
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@kindex maint set can-use-displaced-stepping
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@kindex maint show can-use-displaced-stepping
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@kindex set displaced-stepping
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@kindex show displaced-stepping
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@cindex displaced stepping support
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@cindex out-of-line single-stepping
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@item maint set can-use-displaced-stepping
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@itemx maint show can-use-displaced-stepping
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@item set displaced-stepping
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@itemx show displaced-stepping
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Control whether or not @value{GDBN} will do @dfn{displaced stepping}
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if the target supports it. The default is on. Displaced stepping is
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a way to single-step over breakpoints without removing them from the
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inferior, by executing an out-of-line copy of the instruction that was
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originally at the breakpoint location. It is also known as
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out-of-line single-stepping.
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if the target supports it. Displaced stepping is a way to single-step
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over breakpoints without removing them from the inferior, by executing
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an out-of-line copy of the instruction that was originally at the
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breakpoint location. It is also known as out-of-line single-stepping.
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@table @code
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@item set displaced-stepping on
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If the target architecture supports it, @value{GDBN} will use
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displaced stepping to step over breakpoints.
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@item set displaced-stepping off
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@value{GDBN} will not use displaced stepping to step over breakpoints,
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even if such is supported by the target architecture.
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@cindex non-stop mode, and @samp{set displaced-stepping}
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@item set displaced-stepping auto
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This is the default mode. @value{GDBN} will use displaced stepping
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only if non-stop mode is active (@pxref{Non-Stop Mode}) and the target
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architecture supports displaced stepping.
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@end table
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@kindex maint check-symtabs
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@item maint check-symtabs
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69
gdb/infrun.c
69
gdb/infrun.c
@ -553,26 +553,55 @@ static CORE_ADDR displaced_step_original, displaced_step_copy;
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/* Saved contents of copy area. */
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static gdb_byte *displaced_step_saved_copy;
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/* When this is non-zero, we are allowed to use displaced stepping, if
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the architecture supports it. When this is zero, we use
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traditional the hold-and-step approach. */
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int can_use_displaced_stepping = 1;
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/* Enum strings for "set|show displaced-stepping". */
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static const char can_use_displaced_stepping_auto[] = "auto";
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static const char can_use_displaced_stepping_on[] = "on";
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static const char can_use_displaced_stepping_off[] = "off";
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static const char *can_use_displaced_stepping_enum[] =
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{
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can_use_displaced_stepping_auto,
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can_use_displaced_stepping_on,
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can_use_displaced_stepping_off,
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NULL,
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};
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/* If ON, and the architecture supports it, GDB will use displaced
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stepping to step over breakpoints. If OFF, or if the architecture
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doesn't support it, GDB will instead use the traditional
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hold-and-step approach. If AUTO (which is the default), GDB will
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decide which technique to use to step over breakpoints depending on
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which of all-stop or non-stop mode is active --- displaced stepping
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in non-stop mode; hold-and-step in all-stop mode. */
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static const char *can_use_displaced_stepping =
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can_use_displaced_stepping_auto;
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static void
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show_can_use_displaced_stepping (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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fprintf_filtered (file, _("\
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Debugger's willingness to use displaced stepping to step over "
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"breakpoints is %s.\n"), value);
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if (can_use_displaced_stepping == can_use_displaced_stepping_auto)
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fprintf_filtered (file, _("\
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Debugger's willingness to use displaced stepping to step over \
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breakpoints is %s (currently %s).\n"),
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value, non_stop ? "on" : "off");
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else
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fprintf_filtered (file, _("\
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Debugger's willingness to use displaced stepping to step over \
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breakpoints is %s.\n"), value);
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}
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/* Return non-zero if displaced stepping is enabled, and can be used
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with GDBARCH. */
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/* Return non-zero if displaced stepping can/should be used to step
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over breakpoints. */
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static int
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use_displaced_stepping (struct gdbarch *gdbarch)
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{
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return (can_use_displaced_stepping
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return (((can_use_displaced_stepping == can_use_displaced_stepping_auto
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&& non_stop)
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|| can_use_displaced_stepping == can_use_displaced_stepping_on)
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&& gdbarch_displaced_step_copy_insn_p (gdbarch));
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}
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@ -5241,16 +5270,20 @@ function is skipped and the step command stops at a different source line."),
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show_step_stop_if_no_debug,
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&setlist, &showlist);
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add_setshow_boolean_cmd ("can-use-displaced-stepping", class_maintenance,
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&can_use_displaced_stepping, _("\
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add_setshow_enum_cmd ("displaced-stepping", class_run,
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can_use_displaced_stepping_enum,
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&can_use_displaced_stepping, _("\
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Set debugger's willingness to use displaced stepping."), _("\
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Show debugger's willingness to use displaced stepping."), _("\
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If zero, gdb will not use displaced stepping to step over\n\
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breakpoints, even if such is supported by the target."),
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NULL,
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show_can_use_displaced_stepping,
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&maintenance_set_cmdlist,
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&maintenance_show_cmdlist);
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If on, gdb will use displaced stepping to step over breakpoints if it is\n\
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supported by the target architecture. If off, gdb will not use displaced\n\
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stepping to step over breakpoints, even if such is supported by the target\n\
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architecture. If auto (which is the default), gdb will use displaced stepping\n\
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if the target architecture supports it and non-stop mode is active, but will not\n\
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use it in all-stop mode (see help set non-stop)."),
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NULL,
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show_can_use_displaced_stepping,
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&setlist, &showlist);
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add_setshow_enum_cmd ("exec-direction", class_run, exec_direction_names,
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&exec_direction, _("Set direction of execution.\n\
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