* elf.c (elf_syminfo): Loop over the elf_syminfo_data chain.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@201159 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog
index 1f1d21e..d6f7205 100644 (file)
--- a/libbacktrace/ChangeLog
+++ b/libbacktrace/ChangeLog
@@ -1,5 +1,9 @@
 2013-07-23  Alexander Monakov  <amonakov@ispras.ru>
 
+       * elf.c (elf_syminfo): Loop over the elf_syminfo_data chain.
+
+2013-07-23  Alexander Monakov  <amonakov@ispras.ru>
+
        * elf.c (backtrace_initialize): Pass elf_fileline_fn to
        dl_iterate_phdr callbacks.
 

diff --git a/libbacktrace/elf.c b/libbacktrace/elf.c
index 3676189..c1dbc54 100644 (file)
--- a/libbacktrace/elf.c
+++ b/libbacktrace/elf.c
@@ -454,12 +454,46 @@ elf_syminfo (struct backtrace_state *state, uintptr_t pc,
             void *data)
 {
   struct elf_syminfo_data *edata;
-  struct elf_symbol *sym;
+  struct elf_symbol *sym = NULL;
+
+  if (!state->threaded)
+    {
+      for (edata = (struct elf_syminfo_data *) state->syminfo_data;
+          edata != NULL;
+          edata = edata->next)
+       {
+         sym = ((struct elf_symbol *)
+                bsearch (&pc, edata->symbols, edata->count,
+                         sizeof (struct elf_symbol), elf_symbol_search));
+         if (sym != NULL)
+           break;
+       }
+    }
+  else
+    {
+      struct elf_syminfo_data **pp;
+
+      pp = (struct elf_syminfo_data **) (void *) &state->syminfo_data;
+      while (1)
+       {
+         edata = *pp;
+         /* Atomic load.  */
+         while (!__sync_bool_compare_and_swap (pp, edata, edata))
+           edata = *pp;
+
+         if (edata == NULL)
+           break;
+
+         sym = ((struct elf_symbol *)
+                bsearch (&pc, edata->symbols, edata->count,
+                         sizeof (struct elf_symbol), elf_symbol_search));
+         if (sym != NULL)
+           break;
+
+         pp = &edata->next;
+       }
+    }
 
-  edata = (struct elf_syminfo_data *) state->syminfo_data;
-  sym = ((struct elf_symbol *)
-        bsearch (&pc, edata->symbols, edata->count,
-                 sizeof (struct elf_symbol), elf_symbol_search));
   if (sym == NULL)
     callback (data, pc, NULL, 0);
   else