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gdbserver/linux-low: turn 'supports_hardware_single_step' into a method

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All the linux low targets except arm define the
'supports_hardware_single_step' op to return true.  Hence, we override
the method to return true in linux_process_target, and remove the
definitions in all the linux low targets but arm.

gdbserver/ChangeLog:
2020-04-02  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Remove the 'supports_hardware_single_step' linux target op and
	override the process_stratum_target's op definition in
	linux_process_target to return true.

	* linux-low.h (struct linux_target_ops): Remove the op.
	(class linux_process_target) <finish_step_over>
	<maybe_hw_step>: Declare.
	* linux-low.cc (can_hardware_single_step): Remove.
	(maybe_hw_step): Turn into...
	(linux_process_target::maybe_hw_step): ...this.
	(finish_step_over): Turn into...
	(linux_process_target::finish_step_over): ...this.
	(linux_process_target::supports_hardware_single_step): Update
	to return true.

	Update the callers below.

	(linux_process_target::single_step)
	(linux_process_target::resume_one_lwp_throw)

	* linux-arm-low.cc (class arm_target)
	<supports_hardware_single_step>: Declare.
	(arm_supports_hardware_single_step): Turn into...
	(arm_target::supports_hardware_single_step): ...this.
	(the_low_target): Remove the op field.
	* linux-x86-low.cc (x86_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-aarch64-low.cc (aarch64_supports_hardware_single_step):
	Remove.
	(the_low_target): Remove the op field.
	* linux-bfin-low.cc (bfin_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-crisv32-low.cc (cris_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-m32r-low.cc (m32r_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-m68k-low.cc (m68k_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-ppc-low.cc (ppc_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-s390-low.cc (s390_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-sh-low.cc (sh_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-tic6x-low.cc (tic6x_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-tile-low.cc (tile_supports_hardware_single_step): Remove.
	(the_low_target): Remove the op field.
	* linux-xtensa-low.cc (xtensa_supports_hardware_single_step):
	Remove.
	(the_low_target): Remove the op field.
This commit is contained in:
Tankut Baris Aktemur 2020-04-02 15:11:31 +02:00
parent 9cfd871551
commit b31cdfa69f
16 changed files with 82 additions and 149 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
gdbserver/ChangeLog
View File

@ -1,3 +1,57 @@
2020-04-02 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
Remove the 'supports_hardware_single_step' linux target op and
override the process_stratum_target's op definition in
linux_process_target to return true.
* linux-low.h (struct linux_target_ops): Remove the op.
(class linux_process_target) <finish_step_over>
<maybe_hw_step>: Declare.
* linux-low.cc (can_hardware_single_step): Remove.
(maybe_hw_step): Turn into...
(linux_process_target::maybe_hw_step): ...this.
(finish_step_over): Turn into...
(linux_process_target::finish_step_over): ...this.
(linux_process_target::supports_hardware_single_step): Update
to return true.
Update the callers below.
(linux_process_target::single_step)
(linux_process_target::resume_one_lwp_throw)
* linux-arm-low.cc (class arm_target)
<supports_hardware_single_step>: Declare.
(arm_supports_hardware_single_step): Turn into...
(arm_target::supports_hardware_single_step): ...this.
(the_low_target): Remove the op field.
* linux-x86-low.cc (x86_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-aarch64-low.cc (aarch64_supports_hardware_single_step):
Remove.
(the_low_target): Remove the op field.
* linux-bfin-low.cc (bfin_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-crisv32-low.cc (cris_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-m32r-low.cc (m32r_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-m68k-low.cc (m68k_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-ppc-low.cc (ppc_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-s390-low.cc (s390_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-sh-low.cc (sh_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-tic6x-low.cc (tic6x_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-tile-low.cc (tile_supports_hardware_single_step): Remove.
(the_low_target): Remove the op field.
* linux-xtensa-low.cc (xtensa_supports_hardware_single_step):
Remove.
(the_low_target): Remove the op field.
2020-04-02 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
Turn the 'supports_range_stepping' linux target op into a method

9
gdbserver/linux-aarch64-low.cc
View File

@ -3157,17 +3157,8 @@ aarch64_target::breakpoint_kind_from_current_state (CORE_ADDR *pcptr)
return arm_breakpoint_kind_from_current_state (pcptr);
}
/* Support for hardware single step. */
static int
aarch64_supports_hardware_single_step (void)
{
return 1;
}
struct linux_target_ops the_low_target =
{
aarch64_supports_hardware_single_step,
aarch64_get_syscall_trapinfo,
};

9
gdbserver/linux-arm-low.cc
View File

@ -72,6 +72,8 @@ public:
bool supports_z_point_type (char z_type) override;
bool supports_hardware_single_step () override;
protected:
void low_arch_setup () override;
@ -1030,10 +1032,10 @@ arm_target::low_get_next_pcs (regcache *regcache)
/* Support for hardware single step. */
static int
arm_supports_hardware_single_step (void)
bool
arm_target::supports_hardware_single_step ()
{
return 0;
return false;
}
/* Implementation of linux_target_ops method "get_syscall_trapinfo". */
@ -1117,7 +1119,6 @@ arm_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
arm_supports_hardware_single_step,
arm_get_syscall_trapinfo,
};

9
gdbserver/linux-bfin-low.cc
View File

@ -144,14 +144,6 @@ bfin_target::low_arch_setup ()
current_process ()->tdesc = tdesc_bfin;
}
/* Support for hardware single step. */
static int
bfin_supports_hardware_single_step (void)
{
return 1;
}
static struct usrregs_info bfin_usrregs_info =
{
bfin_num_regs,
@ -171,7 +163,6 @@ bfin_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
bfin_supports_hardware_single_step,
};
/* The linux target ops object. */

9
gdbserver/linux-crisv32-low.cc
View File

@ -426,14 +426,6 @@ crisv32_target::low_arch_setup ()
current_process ()->tdesc = tdesc_crisv32;
}
/* Support for hardware single step. */
static int
cris_supports_hardware_single_step (void)
{
return 1;
}
static struct regset_info cris_regsets[] = {
{ PTRACE_GETREGS, PTRACE_SETREGS, 0, cris_num_regs * 4,
GENERAL_REGS, cris_fill_gregset, cris_store_gregset },
@ -468,7 +460,6 @@ crisv32_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
cris_supports_hardware_single_step,
};
/* The linux target ops object. */

46
gdbserver/linux-low.cc
View File

@ -270,7 +270,6 @@ static int stabilizing_threads;
static void unsuspend_all_lwps (struct lwp_info *except);
static void mark_lwp_dead (struct lwp_info *lwp, int wstat);
static int lwp_is_marked_dead (struct lwp_info *lwp);
static int finish_step_over (struct lwp_info *lwp);
static int kill_lwp (unsigned long lwpid, int signo);
static void enqueue_pending_signal (struct lwp_info *lwp, int signal, siginfo_t *info);
static int linux_low_ptrace_options (int attached);
@ -280,17 +279,6 @@ static int check_ptrace_stopped_lwp_gone (struct lwp_info *lp);
being stepped. */
ptid_t step_over_bkpt;
/* True if the low target can hardware single-step. */
static int
can_hardware_single_step (void)
{
if (the_low_target.supports_hardware_single_step != NULL)
return the_low_target.supports_hardware_single_step ();
else
return 0;
}
bool
linux_process_target::low_supports_breakpoints ()
{
@ -2503,19 +2491,17 @@ linux_process_target::filter_event (int lwpid, int wstat)
return child;
}
/* Return true if THREAD is doing hardware single step. */
static int
maybe_hw_step (struct thread_info *thread)
bool
linux_process_target::maybe_hw_step (thread_info *thread)
{
if (can_hardware_single_step ())
return 1;
if (supports_hardware_single_step ())
return true;
else
{
/* GDBserver must insert single-step breakpoint for software
single step. */
gdb_assert (has_single_step_breakpoints (thread));
return 0;
return false;
}
}
@ -4107,7 +4093,7 @@ linux_process_target::single_step (lwp_info* lwp)
{
int step = 0;
if (can_hardware_single_step ())
if (supports_hardware_single_step ())
{
step = 1;
}
@ -4218,7 +4204,7 @@ linux_process_target::resume_one_lwp_throw (lwp_info *lwp, int step,
debug_printf (" pending reinsert at 0x%s\n",
paddress (lwp->bp_reinsert));
if (can_hardware_single_step ())
if (supports_hardware_single_step ())
{
if (fast_tp_collecting == fast_tpoint_collect_result::not_collecting)
{
@ -4247,7 +4233,7 @@ linux_process_target::resume_one_lwp_throw (lwp_info *lwp, int step,
" single-stepping\n",
lwpid_of (thread));
if (can_hardware_single_step ())
if (supports_hardware_single_step ())
step = 1;
else
{
@ -4700,12 +4686,8 @@ linux_process_target::start_step_over (lwp_info *lwp)
step_over_bkpt = thread->id;
}
/* Finish a step-over. Reinsert the breakpoint we had uninserted in
start_step_over, if still there, and delete any single-step
breakpoints we've set, on non hardware single-step targets. */
static int
finish_step_over (struct lwp_info *lwp)
bool
linux_process_target::finish_step_over (lwp_info *lwp)
{
if (lwp->bp_reinsert != 0)
{
@ -4728,7 +4710,7 @@ finish_step_over (struct lwp_info *lwp)
and later not being able to explain it, because we were
stepping over a breakpoint, and we hold all threads but
LWP stopped while doing that. */
if (!can_hardware_single_step ())
if (!supports_hardware_single_step ())
{
gdb_assert (has_single_step_breakpoints (current_thread));
delete_single_step_breakpoints (current_thread);
@ -4736,10 +4718,10 @@ finish_step_over (struct lwp_info *lwp)
step_over_bkpt = null_ptid;
current_thread = saved_thread;
return 1;
return true;
}
else
return 0;
return false;
}
void
@ -5899,7 +5881,7 @@ linux_process_target::supports_stopped_by_hw_breakpoint ()
bool
linux_process_target::supports_hardware_single_step ()
{
return can_hardware_single_step ();
return true;
}
bool

12
gdbserver/linux-low.h
View File

@ -131,9 +131,6 @@ struct lwp_info;
struct linux_target_ops
{
/* See target.h. */
int (*supports_hardware_single_step) (void);
/* Fill *SYSNO with the syscall nr trapped. Only to be called when
inferior is stopped due to SYSCALL_SIGTRAP. */
void (*get_syscall_trapinfo) (struct regcache *regcache, int *sysno);
@ -401,6 +398,12 @@ private:
events. */
void complete_ongoing_step_over ();
/* Finish a step-over. Reinsert the breakpoint we had uninserted in
start_step_over, if still there, and delete any single-step
breakpoints we've set, on non hardware single-step targets.
Return true if step over finished. */
bool finish_step_over (lwp_info *lwp);
/* When we finish a step-over, set threads running again. If there's
another thread that may need a step-over, now's the time to start
it. Eventually, we'll move all threads past their breakpoints. */
@ -519,6 +522,9 @@ private:
or can't single step. */
int single_step (lwp_info* lwp);
/* Return true if THREAD is doing hardware single step. */
bool maybe_hw_step (thread_info *thread);
/* Install breakpoints for software single stepping. */
void install_software_single_step_breakpoints (lwp_info *lwp);

9
gdbserver/linux-m32r-low.cc
View File

@ -134,14 +134,6 @@ m32r_target::low_arch_setup ()
current_process ()->tdesc = tdesc_m32r;
}
/* Support for hardware single step. */
static int
m32r_supports_hardware_single_step (void)
{
return 1;
}
static struct usrregs_info m32r_usrregs_info =
{
m32r_num_regs,
@ -161,7 +153,6 @@ m32r_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
m32r_supports_hardware_single_step,
};
/* The linux target ops object. */

9
gdbserver/linux-m68k-low.cc
View File

@ -256,16 +256,7 @@ m68k_target::low_arch_setup ()
current_process ()->tdesc = tdesc_m68k;
}
/* Support for hardware single step. */
static int
m68k_supports_hardware_single_step (void)
{
return 1;
}
struct linux_target_ops the_low_target = {
m68k_supports_hardware_single_step,
};
/* The linux target ops object. */

9
gdbserver/linux-ppc-low.cc
View File

@ -805,14 +805,6 @@ ppc_store_evrregset (struct regcache *regcache, const void *buf)
supply_register_by_name (regcache, "spefscr", &regset->spefscr);
}
/* Support for hardware single step. */
static int
ppc_supports_hardware_single_step (void)
{
return 1;
}
static struct regset_info ppc_regsets[] = {
/* List the extra register sets before GENERAL_REGS. That way we will
fetch them every time, but still fall back to PTRACE_PEEKUSER for the
@ -3454,7 +3446,6 @@ ppc_get_ipa_tdesc_idx (void)
}
struct linux_target_ops the_low_target = {
ppc_supports_hardware_single_step,
NULL, /* get_syscall_trapinfo */
ppc_get_ipa_tdesc_idx,
};

9
gdbserver/linux-s390-low.cc
View File

@ -723,14 +723,6 @@ s390_target::supports_z_point_type (char z_type)
}
}
/* Support for hardware single step. */
static int
s390_supports_hardware_single_step (void)
{
return 1;
}
static struct usrregs_info s390_usrregs_info =
{
s390_num_regs,
@ -2863,7 +2855,6 @@ s390_target::emit_ops ()
}
struct linux_target_ops the_low_target = {
s390_supports_hardware_single_step,
NULL, /* get_syscall_trapinfo */
s390_get_ipa_tdesc_idx,
};

9
gdbserver/linux-sh-low.cc
View File

@ -134,14 +134,6 @@ sh_target::low_breakpoint_at (CORE_ADDR where)
return false;
}
/* Support for hardware single step. */
static int
sh_supports_hardware_single_step (void)
{
return 1;
}
/* Provide only a fill function for the general register set. ps_lgetregs
will use this for NPTL support. */
@ -192,7 +184,6 @@ sh_target::low_arch_setup ()
}
struct linux_target_ops the_low_target = {
sh_supports_hardware_single_step,
};
/* The linux target ops object. */

9
gdbserver/linux-tic6x-low.cc
View File

@ -394,14 +394,6 @@ tic6x_target::low_arch_setup ()
current_process ()->tdesc = tic6x_read_description (feature);
}
/* Support for hardware single step. */
static int
tic6x_supports_hardware_single_step (void)
{
return 1;
}
static struct regsets_info tic6x_regsets_info =
{
tic6x_regsets, /* regsets */
@ -423,7 +415,6 @@ tic6x_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
tic6x_supports_hardware_single_step,
};
#if GDB_SELF_TEST

10
gdbserver/linux-tile-low.cc
View File

@ -213,18 +213,8 @@ tile_target::low_arch_setup ()
current_process ()->tdesc = tdesc_tilegx;
}
/* Support for hardware single step. */
static int
tile_supports_hardware_single_step (void)
{
return 1;
}
struct linux_target_ops the_low_target =
{
tile_supports_hardware_single_step,
};
/* The linux target ops object. */

10
gdbserver/linux-x86-low.cc
View File

@ -2964,15 +2964,6 @@ x86_target::low_supports_range_stepping ()
return true;
}
/* Implementation of linux_target_ops method "supports_hardware_single_step".
*/
static int
x86_supports_hardware_single_step (void)
{
return 1;
}
static int
x86_get_ipa_tdesc_idx (void)
{
@ -2994,7 +2985,6 @@ x86_get_ipa_tdesc_idx (void)
struct linux_target_ops the_low_target =
{
x86_supports_hardware_single_step,
x86_get_syscall_trapinfo,
x86_get_ipa_tdesc_idx,
};

9
gdbserver/linux-xtensa-low.cc
View File

@ -314,14 +314,6 @@ xtensa_target::low_arch_setup ()
current_process ()->tdesc = tdesc_xtensa;
}
/* Support for hardware single step. */
static int
xtensa_supports_hardware_single_step (void)
{
return 1;
}
const regs_info *
xtensa_target::get_regs_info ()
{
@ -329,7 +321,6 @@ xtensa_target::get_regs_info ()
}
struct linux_target_ops the_low_target = {
xtensa_supports_hardware_single_step,
};
/* The linux target ops object. */