change probes to be program-space-independent

This changes the probes to be independent of the program space.

After this, when a probe's address is needed, it is determined by
applying offsets at the point of use.

This introduces a bound_probe object, similar to bound minimal
symbols.  Objects of this type are used when it's necessary to pass a
probe and its corresponding objfile.

This removes the backlink from probe to objfile, which was primarily
used to fetch the architecture to use.

This adds a get_probe_address function which calls a probe method to
compute the probe's relocated address.  Similarly, it adds an objfile
parameter to the semaphore methods so they can do the relocation
properly as well.

2014-03-03  Tom Tromey  <tromey@redhat.com>

	* break-catch-throw.c (fetch_probe_arguments): Use bound probes.
	* breakpoint.c (create_longjmp_master_breakpoint): Use
	get_probe_address.
	(add_location_to_breakpoint, bkpt_probe_insert_location)
	(bkpt_probe_remove_location): Update.
	* breakpoint.h (struct bp_location) <probe>: Now a bound_probe.
	* elfread.c (elf_symfile_relocate_probe): Remove.
	(elf_probe_fns): Update.
	(insert_exception_resume_breakpoint): Change type of "probe"
	parameter to bound_probe.
	(check_exception_resume): Update.
	* objfiles.c (objfile_relocate1): Don't relocate probes.
	* probe.c (bound_probe_s): New typedef.
	(parse_probes): Use get_probe_address.  Set sal's objfile.
	(find_probe_by_pc): Return a bound_probe.
	(collect_probes): Return a VEC(bound_probe_s).
	(compare_probes): Update.
	(gen_ui_out_table_header_info): Change type of "probes"
	parameter.  Update.
	(info_probes_for_ops): Update.
	(get_probe_address): New function.
	(probe_safe_evaluate_at_pc): Update.
	* probe.h (struct probe_ops) <get_probe_address>: New field.
	<set_semaphore, clear_semaphore>: Add objfile parameter.
	(struct probe) <objfile>: Remove field.
	<arch>: New field.
	<address>: Update comment.
	(struct bound_probe): New.
	(find_probe_by_pc): Return a bound_probe.
	(get_probe_address): Declare.
	* solib-svr4.c (struct probe_and_action) <address>: New field.
	(hash_probe_and_action, equal_probe_and_action): Update.
	(register_solib_event_probe): Add address parameter.
	(solib_event_probe_at): Update.
	(svr4_create_probe_breakpoints): Add objfile parameter.  Use
	get_probe_address.
	* stap-probe.c (struct stap_probe) <sem_addr>: Update comment.
	(stap_get_probe_address): New function.
	(stap_can_evaluate_probe_arguments, compute_probe_arg)
	(compile_probe_arg): Update.
	(stap_set_semaphore, stap_clear_semaphore): Compute semaphore's
	address.
	(handle_stap_probe): Don't relocate the probe.
	(stap_relocate): Remove.
	(stap_gen_info_probes_table_values): Update.
	(stap_probe_ops): Remove stap_relocate.
	* symfile-debug.c (debug_sym_relocate_probe): Remove.
	(debug_sym_probe_fns): Update.
	* symfile.h (struct sym_probe_fns) <sym_relocate_probe>: Remove.
	* symtab.c (init_sal): Use memset.
	* symtab.h (struct symtab_and_line) <objfile>: New field.
	* tracepoint.c (start_tracing, stop_tracing): Update.

1 files changed, 9 insertions, 9 deletions

diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c
index 5191a90..7283490 100644
--- a/gdb/break-catch-throw.c
+++ b/gdb/break-catch-throw.c
@@ -106,25 +106,25 @@ fetch_probe_arguments (struct value **arg0, struct value **arg1)
 {
   struct frame_info *frame = get_selected_frame (_("No frame selected"));
   CORE_ADDR pc = get_frame_pc (frame);
-  struct probe *pc_probe;
+  struct bound_probe pc_probe;
   const struct sym_probe_fns *pc_probe_fns;
   unsigned n_args;
 
   pc_probe = find_probe_by_pc (pc);
-  if (pc_probe == NULL
-      || strcmp (pc_probe->provider, "libstdcxx") != 0
-      || (strcmp (pc_probe->name, "catch") != 0
-	  && strcmp (pc_probe->name, "throw") != 0
-	  && strcmp (pc_probe->name, "rethrow") != 0))
+  if (pc_probe.probe == NULL
+      || strcmp (pc_probe.probe->provider, "libstdcxx") != 0
+      || (strcmp (pc_probe.probe->name, "catch") != 0
+	  && strcmp (pc_probe.probe->name, "throw") != 0
+	  && strcmp (pc_probe.probe->name, "rethrow") != 0))
     error (_("not stopped at a C++ exception catchpoint"));
 
-  n_args = get_probe_argument_count (pc_probe, frame);
+  n_args = get_probe_argument_count (pc_probe.probe, frame);
   if (n_args < 2)
     error (_("C++ exception catchpoint has too few arguments"));
 
   if (arg0 != NULL)
-    *arg0 = evaluate_probe_argument (pc_probe, 0, frame);
-  *arg1 = evaluate_probe_argument (pc_probe, 1, frame);
+    *arg0 = evaluate_probe_argument (pc_probe.probe, 0, frame);
+  *arg1 = evaluate_probe_argument (pc_probe.probe, 1, frame);
 
   if ((arg0 != NULL && *arg0 == NULL) || *arg1 == NULL)
     error (_("error computing probe argument at c++ exception catchpoint"));