re PR other/29639 (ext/bitmap_allocator/check_allocate_max_size.cc execution test)

PR other/29639
	* except.c (switch_to_exception_section): Do not cache the section
	if named sections are supported and HAVE_LD_EH_GC_SECTIONS is defined
	and flag_function_sections is set.

From-SVN: r118422

gcc/ChangeLog

@@ -1,3 +1,10 @@
+2006-11-02  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR other/29639
+	* except.c (switch_to_exception_section): Do not cache the section
+	if named sections are supported and HAVE_LD_EH_GC_SECTIONS is defined
+	and flag_function_sections is set.
+
 2006-11-01  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	PR middle-end/29335

gcc/except.c

@@ -3522,8 +3522,14 @@ sjlj_output_call_site_table (void)
 static void
 switch_to_exception_section (const char * ARG_UNUSED (fnname))
 {
-  if (exception_section == 0)
+  section *s;
+
+  if (exception_section)
+    s = exception_section;
+  else
     {
+      /* Compute the section and cache it into exception_section,
+	 unless it depends on the function name.  */
       if (targetm.have_named_sections)
 	{
 	  int flags;
@@ -3539,22 +3545,26 @@ switch_to_exception_section (const char * ARG_UNUSED (fnname))
 	    }
 	  else
 	    flags = SECTION_WRITE;
+
 #ifdef HAVE_LD_EH_GC_SECTIONS
 	  if (flag_function_sections)
 	    {
 	      char *section_name = xmalloc (strlen (fnname) + 32);
 	      sprintf (section_name, ".gcc_except_table.%s", fnname);
-	      exception_section = get_section (section_name, flags, NULL);
+	      s = get_section (section_name, flags, NULL);
 	      free (section_name);
 	    }
 	  else
 #endif
-	  exception_section = get_section (".gcc_except_table", flags, NULL);
+	    exception_section
+	      = s = get_section (".gcc_except_table", flags, NULL);
 	}
       else
-	exception_section = flag_pic ? data_section : readonly_data_section;
+	exception_section
+	  = s = flag_pic ? data_section : readonly_data_section;
     }
-  switch_to_section (exception_section);
+
+  switch_to_section (s);
 }
 #endif
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2006-11-02  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* g++.dg/eh/gcsec1.C: New test.
+
 2006-11-01  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* gcc.dg/torture/builtin-math-3.c: Fix semicolons.

gcc/testsuite/g++.dg/eh/gcsec1.C

@@ -0,0 +1,45 @@
+/* PR other/29639 */
+/* AIX gld supports garbage collection. But AIX gcc does not support 
+   -ffunction-sections or -fdata-sections.  */
+/* { dg-do run { xfail rs6000-*-aix* powerpc*-*-aix* } } */
+/* { dg-require-gc-sections "" } */
+/* { dg-options "-ffunction-sections -Wl,--gc-sections" } */
+
+extern "C" void abort (void);
+
+int g = 0;
+
+void raise_exception()
+{
+  throw 1;
+}
+
+void used()
+{
+  try {
+    raise_exception ();
+  }
+  catch (int) {
+    g = 1;
+  }
+}
+
+void unused()
+{
+  try {
+    raise_exception ();
+  }
+  catch (int) {
+    g = 1;
+  }
+}
+
+int main()
+{
+  used ();
+
+  if (g != 1)
+    abort ();
+
+  return 0;
+}