change delegation for to_read_description

[deliverable/binutils-gdb.git] / gdb / ctf.c

diff --git a/gdb/ctf.c b/gdb/ctf.c
index a22937f09658a8fc3b25edb548300464ebd3e61c..8777014e220fa9d991bf8665cae6ad4081fc8e9a 100644 (file)
--- a/gdb/ctf.c
+++ b/gdb/ctf.c
@@ -26,6 +26,8 @@
 #include <sys/stat.h>
 #include "exec.h"
 #include "completer.h"
+#include "inferior.h"
+#include "gdbthread.h"
 
 #include <ctype.h>
 
@@ -76,6 +78,8 @@
 #define CTF_EVENT_ID_TSV_DEF 5
 #define CTF_EVENT_ID_TP_DEF 6
 
+#define CTF_PID (2)
+
 /* The state kept while writing the CTF datastream file.  */
 
 struct trace_write_handler
@@ -1188,6 +1192,10 @@ ctf_open (char *dirname, int from_tty)
   trace_dirname = xstrdup (dirname);
   push_target (&ctf_ops);
 
+  inferior_appeared (current_inferior (), CTF_PID);
+  inferior_ptid = pid_to_ptid (CTF_PID);
+  add_thread_silent (inferior_ptid);
+
   merge_uploaded_trace_state_variables (&uploaded_tsvs);
   merge_uploaded_tracepoints (&uploaded_tps);
 }
@@ -1196,12 +1204,18 @@ ctf_open (char *dirname, int from_tty)
    CTF iterator and context.  */
 
 static void
-ctf_close (void)
+ctf_close (struct target_ops *self)
 {
+  int pid;
+
   ctf_destroy ();
   xfree (trace_dirname);
   trace_dirname = NULL;
 
+  pid = ptid_get_pid (inferior_ptid);
+  inferior_ptid = null_ptid;   /* Avoid confusion from thread stuff.  */
+  exit_inferior_silent (pid);
+
   trace_reset_local_state ();
 }
 
@@ -1345,11 +1359,11 @@ ctf_fetch_registers (struct target_ops *ops,
    OFFSET is within the range, read the contents from events to
    READBUF.  */
 
-static LONGEST
+static enum target_xfer_status
 ctf_xfer_partial (struct target_ops *ops, enum target_object object,
                  const char *annex, gdb_byte *readbuf,
                  const gdb_byte *writebuf, ULONGEST offset,
-                 ULONGEST len)
+                 ULONGEST len, ULONGEST *xfered_len)
 {
   /* We're only doing regular memory for now.  */
   if (object != TARGET_OBJECT_MEMORY)
@@ -1435,7 +1449,13 @@ ctf_xfer_partial (struct target_ops *ops, enum target_object object,
              /* Restore the position.  */
              bt_iter_set_pos (bt_ctf_get_iter (ctf_iter), pos);
 
-             return amt;
+             if (amt == 0)
+               return TARGET_XFER_EOF;
+             else
+               {
+                 *xfered_len = amt;
+                 return TARGET_XFER_OK;
+               }
            }
 
          if (bt_iter_next (bt_ctf_get_iter (ctf_iter)) < 0)
@@ -1473,13 +1493,20 @@ ctf_xfer_partial (struct target_ops *ops, enum target_object object,
 
              amt = bfd_get_section_contents (exec_bfd, s,
                                              readbuf, offset - vma, amt);
-             return amt;
+
+             if (amt == 0)
+               return TARGET_XFER_EOF;
+             else
+               {
+                 *xfered_len = amt;
+                 return TARGET_XFER_OK;
+               }
            }
        }
     }
 
   /* Indicate failure to find the requested memory block.  */
-  return -1;
+  return TARGET_XFER_E_IO;
 }
 
 /* This is the implementation of target_ops method
@@ -1489,7 +1516,8 @@ ctf_xfer_partial (struct target_ops *ops, enum target_object object,
    true, otherwise return false.  */
 
 static int
-ctf_get_trace_state_variable_value (int tsvnum, LONGEST *val)
+ctf_get_trace_state_variable_value (struct target_ops *self,
+                                   int tsvnum, LONGEST *val)
 {
   struct bt_iter_pos *pos;
   int found = 0;
@@ -1606,7 +1634,7 @@ ctf_get_traceframe_address (void)
    number in it.  Return traceframe number when matched.  */
 
 static int
-ctf_trace_find (enum trace_find_type type, int num,
+ctf_trace_find (struct target_ops *self, enum trace_find_type type, int num,
                CORE_ADDR addr1, CORE_ADDR addr2, int *tpp)
 {
   int ret = -1;
@@ -1725,13 +1753,22 @@ ctf_has_registers (struct target_ops *ops)
   return get_traceframe_number () != -1;
 }
 
+/* This is the implementation of target_ops method to_thread_alive.
+   CTF trace data has one thread faked by GDB.  */
+
+static int
+ctf_thread_alive (struct target_ops *ops, ptid_t ptid)
+{
+  return 1;
+}
+
 /* This is the implementation of target_ops method to_traceframe_info.
    Iterate the events whose name is "memory", in current
    frame, extract memory range information, and return them in
    traceframe_info.  */
 
 static struct traceframe_info *
-ctf_traceframe_info (void)
+ctf_traceframe_info (struct target_ops *self)
 {
   struct traceframe_info *info = XCNEW (struct traceframe_info);
   const char *name;
@@ -1801,7 +1838,7 @@ ctf_traceframe_info (void)
    The trace status for a file is that tracing can never be run.  */
 
 static int
-ctf_get_trace_status (struct trace_status *ts)
+ctf_get_trace_status (struct target_ops *self, struct trace_status *ts)
 {
   /* Other bits of trace status were collected as part of opening the
      trace files, so nothing to do here.  */
@@ -1831,6 +1868,7 @@ Specify the filename of the CTF directory.";
   ctf_ops.to_has_stack = ctf_has_stack;
   ctf_ops.to_has_registers = ctf_has_registers;
   ctf_ops.to_traceframe_info = ctf_traceframe_info;
+  ctf_ops.to_thread_alive = ctf_thread_alive;
   ctf_ops.to_magic = OPS_MAGIC;
 }