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/ia64-linux-nat.c b/gdb/ia64-linux-nat.c
index a11cb2c..9f74bb7 100644
--- a/gdb/ia64-linux-nat.c
+++ b/gdb/ia64-linux-nat.c
@@ -70,11 +70,11 @@ public:
      has determined that a hardware watchpoint has indeed been hit.
      The CPU will then be able to execute one instruction without
      triggering a watchpoint.  */
-  int have_steppable_watchpoint () { return 1; }
+  bool have_steppable_watchpoint () { return 1; }
 
   int can_use_hw_breakpoint (enum bptype, int, int) override;
-  int stopped_by_watchpoint () override;
-  int stopped_data_address (CORE_ADDR *) override;
+  bool stopped_by_watchpoint () override;
+  bool stopped_data_address (CORE_ADDR *) override;
   int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
 			 struct expression *) override;
   int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
@@ -688,7 +688,7 @@ ia64_linux_new_thread (struct lwp_info *lp)
     enable_watchpoints_in_psr (lp->ptid);
 }
 
-int
+bool
 ia64_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
 {
   CORE_ADDR psr;
@@ -696,11 +696,11 @@ ia64_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
   struct regcache *regcache = get_current_regcache ();
 
   if (!linux_nat_get_siginfo (inferior_ptid, &siginfo))
-    return 0;
+    return false;
 
   if (siginfo.si_signo != SIGTRAP
       || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
-    return 0;
+    return false;
 
   regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr);
   psr |= IA64_PSR_DD;	/* Set the dd bit - this will disable the watchpoint
@@ -708,10 +708,10 @@ ia64_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
   regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
 
   *addr_p = (CORE_ADDR) siginfo.si_addr;
-  return 1;
+  return true;
 }
 
-int
+bool
 ia64_linux_nat_target::stopped_by_watchpoint ()
 {
   CORE_ADDR addr;