gdb: fix vfork with multiple threads
[deliverable/binutils-gdb.git] / gdbserver / target.h
index f6976303ee0a389ec6b0766272ebdf01dec23ab9..2c4393ec8c61a20d36392bb5f7e6277109a2d627 100644 (file)
@@ -1,5 +1,5 @@
 /* Target operations for the remote server for GDB.
-   Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.
 
    Contributed by MontaVista Software.
 
 #include "target/wait.h"
 #include "target/waitstatus.h"
 #include "mem-break.h"
+#include "gdbsupport/array-view.h"
 #include "gdbsupport/btrace-common.h"
 #include <vector>
+#include "gdbsupport/byte-vector.h"
 
 struct emit_ops;
 struct buffer;
@@ -63,22 +65,15 @@ struct thread_resume
   CORE_ADDR step_range_end;    /* Exclusive */
 };
 
-class process_target;
-
 /* GDBserver doesn't have a concept of strata like GDB, but we call
    its target vector "process_stratum" anyway for the benefit of
    shared code.  */
-struct process_stratum_target
-{
-  /* The object that will gradually replace this struct.  */
-  process_target *pt;
-};
 
-class process_target
+class process_stratum_target
 {
 public:
 
-  virtual ~process_target () = default;
+  virtual ~process_stratum_target () = default;
 
   /* Start a new process.
 
@@ -134,7 +129,7 @@ public:
      no child stop to report, return is
      null_ptid/TARGET_WAITKIND_IGNORE.  */
   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
-                      int options) = 0;
+                      target_wait_flags options) = 0;
 
   /* Fetch registers from the inferior process.
 
@@ -261,10 +256,6 @@ public:
   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
                               CORE_ADDR load_module, CORE_ADDR *address);
 
-  /* Fill BUF with an hostio error packet representing the last hostio
-     error.  */
-  virtual void hostio_last_error (char *buf);
-
   /* Return true if the qxfer_osdata target op is supported.  */
   virtual bool supports_qxfer_osdata ();
 
@@ -322,8 +313,9 @@ public:
                            unsigned char *myaddr, unsigned int len);
 
   /* Target specific qSupported support.  FEATURES is an array of
-     features with COUNT elements.  */
-  virtual void process_qsupported (char **features, int count);
+     features unsupported by the core of GDBserver.  */
+  virtual void process_qsupported
+    (gdb::array_view<const char * const> features);
 
   /* Return true if the target supports tracepoints, false otherwise.  */
   virtual bool supports_tracepoints ();
@@ -444,7 +436,7 @@ public:
      character string containing the pathname is returned.  This
      string should be copied into a buffer by the client if the string
      will not be immediately used, or if it must persist.  */
-  virtual char *pid_to_exec_file (int pid);
+  virtual const char *pid_to_exec_file (int pid);
 
   /* Return true if any of the multifs ops is supported.  */
   virtual bool supports_multifs ();
@@ -504,6 +496,23 @@ public:
 
   /* Return tdesc index for IPA.  */
   virtual int get_ipa_tdesc_idx ();
+
+  /* Returns true if the target supports memory tagging facilities.  */
+  virtual bool supports_memory_tagging ();
+
+  /* Return the allocated memory tags of type TYPE associated with
+     [ADDRESS, ADDRESS + LEN) in TAGS.
+
+     Returns true if successful and false otherwise.  */
+  virtual bool fetch_memtags (CORE_ADDR address, size_t len,
+                             gdb::byte_vector &tags, int type);
+
+  /* Write the allocation tags of type TYPE contained in TAGS to the
+     memory range [ADDRESS, ADDRESS + LEN).
+
+     Returns true if successful and false otherwise.  */
+  virtual bool store_memtags (CORE_ADDR address, size_t len,
+                             const gdb::byte_vector &tags, int type);
 };
 
 extern process_stratum_target *the_target;
@@ -511,78 +520,81 @@ extern process_stratum_target *the_target;
 void set_target_ops (process_stratum_target *);
 
 #define target_create_inferior(program, program_args)  \
-  the_target->pt->create_inferior (program, program_args)
+  the_target->create_inferior (program, program_args)
 
 #define target_post_create_inferior()                   \
-  the_target->pt->post_create_inferior ()
+  the_target->post_create_inferior ()
 
 #define myattach(pid) \
-  the_target->pt->attach (pid)
+  the_target->attach (pid)
 
 int kill_inferior (process_info *proc);
 
 #define target_supports_fork_events() \
-  the_target->pt->supports_fork_events ()
+  the_target->supports_fork_events ()
 
 #define target_supports_vfork_events() \
-  the_target->pt->supports_vfork_events ()
+  the_target->supports_vfork_events ()
 
 #define target_supports_exec_events() \
-  the_target->pt->supports_exec_events ()
+  the_target->supports_exec_events ()
+
+#define target_supports_memory_tagging() \
+  the_target->supports_memory_tagging ()
 
 #define target_handle_new_gdb_connection()              \
-  the_target->pt->handle_new_gdb_connection ()
+  the_target->handle_new_gdb_connection ()
 
 #define detach_inferior(proc) \
-  the_target->pt->detach (proc)
+  the_target->detach (proc)
 
 #define mythread_alive(pid) \
-  the_target->pt->thread_alive (pid)
+  the_target->thread_alive (pid)
 
 #define fetch_inferior_registers(regcache, regno)      \
-  the_target->pt->fetch_registers (regcache, regno)
+  the_target->fetch_registers (regcache, regno)
 
 #define store_inferior_registers(regcache, regno) \
-  the_target->pt->store_registers (regcache, regno)
+  the_target->store_registers (regcache, regno)
 
 #define join_inferior(pid) \
-  the_target->pt->join (pid)
+  the_target->join (pid)
 
 #define target_supports_non_stop() \
-  the_target->pt->supports_non_stop ()
+  the_target->supports_non_stop ()
 
 #define target_async(enable) \
-  the_target->pt->async (enable)
+  the_target->async (enable)
 
-#define target_process_qsupported(features, count)     \
-  the_target->pt->process_qsupported (features, count)
+#define target_process_qsupported(features) \
+  the_target->process_qsupported (features)
 
 #define target_supports_catch_syscall()                \
-  the_target->pt->supports_catch_syscall ()
+  the_target->supports_catch_syscall ()
 
 #define target_get_ipa_tdesc_idx()                     \
-  the_target->pt->get_ipa_tdesc_idx ()
+  the_target->get_ipa_tdesc_idx ()
 
 #define target_supports_tracepoints()                  \
-  the_target->pt->supports_tracepoints ()
+  the_target->supports_tracepoints ()
 
 #define target_supports_fast_tracepoints()             \
-  the_target->pt->supports_fast_tracepoints ()
+  the_target->supports_fast_tracepoints ()
 
 #define target_get_min_fast_tracepoint_insn_len()      \
-  the_target->pt->get_min_fast_tracepoint_insn_len ()
+  the_target->get_min_fast_tracepoint_insn_len ()
 
 #define target_thread_stopped(thread) \
-  the_target->pt->thread_stopped (thread)
+  the_target->thread_stopped (thread)
 
 #define target_pause_all(freeze)               \
-  the_target->pt->pause_all (freeze)
+  the_target->pause_all (freeze)
 
 #define target_unpause_all(unfreeze)           \
-  the_target->pt->unpause_all (unfreeze)
+  the_target->unpause_all (unfreeze)
 
 #define target_stabilize_threads()             \
-  the_target->pt->stabilize_threads ()
+  the_target->stabilize_threads ()
 
 #define target_install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
                                                collector, lockaddr,    \
@@ -594,36 +606,36 @@ int kill_inferior (process_info *proc);
                                                adjusted_insn_addr,     \
                                                adjusted_insn_addr_end, \
                                                err)                    \
-  the_target->pt->install_fast_tracepoint_jump_pad (tpoint, tpaddr,    \
-                                                   collector,lockaddr, \
-                                                   orig_size, jump_entry, \
-                                                   trampoline,         \
-                                                   trampoline_size,    \
-                                                   jjump_pad_insn,     \
-                                                   jjump_pad_insn_size, \
-                                                   adjusted_insn_addr, \
-                                                   adjusted_insn_addr_end, \
-                                                   err)
+  the_target->install_fast_tracepoint_jump_pad (tpoint, tpaddr,        \
+                                               collector,lockaddr,     \
+                                               orig_size, jump_entry,  \
+                                               trampoline,             \
+                                               trampoline_size,        \
+                                               jjump_pad_insn,         \
+                                               jjump_pad_insn_size,    \
+                                               adjusted_insn_addr,     \
+                                               adjusted_insn_addr_end, \
+                                               err)
 
 #define target_emit_ops() \
-  the_target->pt->emit_ops ()
+  the_target->emit_ops ()
 
 #define target_supports_disable_randomization() \
-  the_target->pt->supports_disable_randomization ()
+  the_target->supports_disable_randomization ()
 
 #define target_supports_agent() \
-  the_target->pt->supports_agent ()
+  the_target->supports_agent ()
 
 static inline struct btrace_target_info *
 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 {
-  return the_target->pt->enable_btrace (ptid, conf);
+  return the_target->enable_btrace (ptid, conf);
 }
 
 static inline int
 target_disable_btrace (struct btrace_target_info *tinfo)
 {
-  return the_target->pt->disable_btrace (tinfo);
+  return the_target->disable_btrace (tinfo);
 }
 
 static inline int
@@ -631,45 +643,45 @@ target_read_btrace (struct btrace_target_info *tinfo,
                    struct buffer *buffer,
                    enum btrace_read_type type)
 {
-  return the_target->pt->read_btrace (tinfo, buffer, type);
+  return the_target->read_btrace (tinfo, buffer, type);
 }
 
 static inline int
 target_read_btrace_conf (struct btrace_target_info *tinfo,
                         struct buffer *buffer)
 {
-  return the_target->pt->read_btrace_conf (tinfo, buffer);
+  return the_target->read_btrace_conf (tinfo, buffer);
 }
 
 #define target_supports_range_stepping() \
-  the_target->pt->supports_range_stepping ()
+  the_target->supports_range_stepping ()
 
 #define target_supports_stopped_by_sw_breakpoint() \
-  the_target->pt->supports_stopped_by_sw_breakpoint ()
+  the_target->supports_stopped_by_sw_breakpoint ()
 
 #define target_stopped_by_sw_breakpoint() \
-  the_target->pt->stopped_by_sw_breakpoint ()
+  the_target->stopped_by_sw_breakpoint ()
 
 #define target_supports_stopped_by_hw_breakpoint() \
-  the_target->pt->supports_stopped_by_hw_breakpoint ()
+  the_target->supports_stopped_by_hw_breakpoint ()
 
 #define target_supports_hardware_single_step() \
-  the_target->pt->supports_hardware_single_step ()
+  the_target->supports_hardware_single_step ()
 
 #define target_stopped_by_hw_breakpoint() \
-  the_target->pt->stopped_by_hw_breakpoint ()
+  the_target->stopped_by_hw_breakpoint ()
 
 #define target_breakpoint_kind_from_pc(pcptr) \
-  the_target->pt->breakpoint_kind_from_pc (pcptr)
+  the_target->breakpoint_kind_from_pc (pcptr)
 
 #define target_breakpoint_kind_from_current_state(pcptr) \
-  the_target->pt->breakpoint_kind_from_current_state (pcptr)
+  the_target->breakpoint_kind_from_current_state (pcptr)
 
 #define target_supports_software_single_step() \
-  the_target->pt->supports_software_single_step ()
+  the_target->supports_software_single_step ()
 
-ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
-              int connected_wait);
+ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus,
+              target_wait_flags options, int connected_wait);
 
 /* Prepare to read or write memory from the inferior process.  See the
    corresponding process_stratum_target methods for more details.  */
@@ -678,13 +690,13 @@ int prepare_to_access_memory (void);
 void done_accessing_memory (void);
 
 #define target_core_of_thread(ptid)            \
-  the_target->pt->core_of_thread (ptid)
+  the_target->core_of_thread (ptid)
 
 #define target_thread_name(ptid)                                \
-  the_target->pt->thread_name (ptid)
+  the_target->thread_name (ptid)
 
 #define target_thread_handle(ptid, handle, handle_len) \
-  the_target->pt->thread_handle (ptid, handle, handle_len)
+  the_target->thread_handle (ptid, handle, handle_len)
 
 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 
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