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, 11 insertions, 11 deletions

diff --git a/gdb/inf-child.h b/gdb/inf-child.h
index 99173ed..b754a95 100644
--- a/gdb/inf-child.h
+++ b/gdb/inf-child.h
@@ -65,7 +65,7 @@ public:
 
   void mourn_inferior () override;
 
-  int can_run () override;
+  bool can_run () override;
 
   bool can_create_inferior () override;
   void create_inferior (const char *, const std::string &,
@@ -78,17 +78,17 @@ public:
 
   /* We must default these because they must be implemented by any
      target that can run.  */
-  int can_async_p () override { return 0; }
-  int supports_non_stop () override { return 0; }
-  int supports_disable_randomization () override { return 0; }
+  bool can_async_p ()  override { return false; }
+  bool supports_non_stop ()  override { return false; }
+  bool supports_disable_randomization () override { return false; }
 
   char *pid_to_exec_file (int pid) override;
 
-  int has_all_memory () override;
-  int has_memory () override;
-  int has_stack () override;
-  int has_registers () override;
-  int has_execution (ptid_t) override;
+  bool has_all_memory () override;
+  bool has_memory () override;
+  bool has_stack () override;
+  bool has_registers () override;
+  bool has_execution (ptid_t) override;
 
   int fileio_open (struct inferior *inf, const char *filename,
 		   int flags, int mode, int warn_if_slow,
@@ -105,9 +105,9 @@ public:
   gdb::optional<std::string> fileio_readlink (struct inferior *inf,
 					      const char *filename,
 					      int *target_errno) override;
-  int use_agent (int use) override;
+  bool use_agent (bool use) override;
 
-  int can_use_agent () override;
+  bool can_use_agent () override;
 
 protected:
   /* Unpush the target if it wasn't explicitly open with "target native"