target_ops: Use bool throughout

After the previous target_ops/C++ patches are all squashed and merged,
this one can go in separately.

This patch adjusts all the target methods to return bool instead of int
when they're returning a boolean.

gdb/ChangeLog:
2018-05-02  Pedro Alves  <palves@redhat.com>

	* target.h (target_ops)
	<stopped_by_sw_breakpoint, supports_stopped_by_sw_breakpoint,
	stopped_by_hw_breakpoint, supports_stopped_by_hw_breakpoint,
	stopped_by_watchpoint, have_continuable_watchpoint,
	stopped_data_address, watchpoint_addr_within_range,
	can_accel_watchpoint_condition, can_run, thread_alive,
	has_all_memory, has_memory, has_stack, has_registers,
	has_execution, can_async_p, is_async_p, supports_non_stop,
	always_non_stop_p, can_execute_reverse, supports_multi_process,
	supports_enable_disable_tracepoint,
	supports_disable_randomization, supports_string_tracing,
	supports_evaluation_of_breakpoint_conditions,
	can_run_breakpoint_commands, filesystem_is_local,
	can_download_tracepoint, get_trace_state_variable_value,
	set_trace_notes, get_tib_address, use_agent, can_use_agent,
	record_is_replaying, record_will_replay,
	augmented_libraries_svr4_read>: Adjust to return bool.
	* aarch64-linux-nat.c: All implementations adjusted.
	* aix-thread.c: All implementations adjusted.
	* arm-linux-nat.c: All implementations adjusted.
	* breakpoint.c: All implementations adjusted.
	* bsd-kvm.c: All implementations adjusted.
	* bsd-uthread.c: All implementations adjusted.
	* corelow.c: All implementations adjusted.
	* ctf.c: All implementations adjusted.
	* darwin-nat.c: All implementations adjusted.
	* darwin-nat.h: All implementations adjusted.
	* exec.c: All implementations adjusted.
	* fbsd-nat.c: All implementations adjusted.
	* fbsd-nat.h: All implementations adjusted.
	* gnu-nat.c: All implementations adjusted.
	* gnu-nat.h: All implementations adjusted.
	* go32-nat.c: All implementations adjusted.
	* ia64-linux-nat.c: All implementations adjusted.
	* inf-child.c: All implementations adjusted.
	* inf-child.h: All implementations adjusted.
	* inf-ptrace.c: All implementations adjusted.
	* inf-ptrace.h: All implementations adjusted.
	* linux-nat.c: All implementations adjusted.
	* linux-nat.h: All implementations adjusted.
	* mips-linux-nat.c: All implementations adjusted.
	* nto-procfs.c: All implementations adjusted.
	* ppc-linux-nat.c: All implementations adjusted.
	* procfs.c: All implementations adjusted.
	* ravenscar-thread.c: All implementations adjusted.
	* record-btrace.c: All implementations adjusted.
	* record-full.c: All implementations adjusted.
	* remote-sim.c: All implementations adjusted.
	* remote.c: All implementations adjusted.
	* s390-linux-nat.c: All implementations adjusted.
	* sol-thread.c: All implementations adjusted.
	* spu-multiarch.c: All implementations adjusted.
	* target-delegates.c: All implementations adjusted.
	* target.c: All implementations adjusted.
	* target.h: All implementations adjusted.
	* tracefile-tfile.c: All implementations adjusted.
	* tracefile.c: All implementations adjusted.
	* tracefile.h: All implementations adjusted.
	* windows-nat.c: All implementations adjusted.
	* x86-linux-nat.h: All implementations adjusted.
	* x86-nat.h: All implementations adjusted.

1 files changed, 8 insertions, 8 deletions

diff --git a/gdb/fbsd-nat.c b/gdb/fbsd-nat.c
index 08976da..069e1e4 100644
--- a/gdb/fbsd-nat.c
+++ b/gdb/fbsd-nat.c
@@ -807,7 +807,7 @@ show_fbsd_nat_debug (struct ui_file *file, int from_tty,
 
 /* Return true if PTID is still active in the inferior.  */
 
-int
+bool
 fbsd_nat_target::thread_alive (ptid_t ptid)
 {
   if (ptid_lwp_p (ptid))
@@ -816,14 +816,14 @@ fbsd_nat_target::thread_alive (ptid_t ptid)
 
       if (ptrace (PT_LWPINFO, ptid_get_lwp (ptid), (caddr_t) &pl, sizeof pl)
 	  == -1)
-	return 0;
+	return false;
 #ifdef PL_FLAG_EXITED
       if (pl.pl_flags & PL_FLAG_EXITED)
-	return 0;
+	return false;
 #endif
     }
 
-  return 1;
+  return true;
 }
 
 /* Convert PTID to a string.  Returns the string in a static
@@ -1452,14 +1452,14 @@ fbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
 #ifdef USE_SIGTRAP_SIGINFO
 /* Implement the "stopped_by_sw_breakpoint" target_ops method.  */
 
-int
+bool
 fbsd_nat_target::stopped_by_sw_breakpoint ()
 {
   struct ptrace_lwpinfo pl;
 
   if (ptrace (PT_LWPINFO, get_ptrace_pid (inferior_ptid), (caddr_t) &pl,
 	      sizeof pl) == -1)
-    return 0;
+    return false;
 
   return ((pl.pl_flags & PL_FLAG_SI)
 	  && pl.pl_siginfo.si_signo == SIGTRAP
@@ -1469,10 +1469,10 @@ fbsd_nat_target::stopped_by_sw_breakpoint ()
 /* Implement the "supports_stopped_by_sw_breakpoint" target_ops
    method.  */
 
-int
+bool
 fbsd_nat_target::supports_stopped_by_sw_breakpoint ()
 {
-  return 1;
+  return true;
 }
 #endif