Re: [PATCH] Fix handling of #include files during prologue skipping

["Tiago Stürmer Daitx" <tdaitx@linux.vnet.ibm.com>]

I got a tip from Edjunior to use gdb_get_line_number instead of that
hardcoded/magic line number. Works like a charm.


Cheers

-tiago


gdb/ChangeLog

2013-01-24  Ulrich Weigand  <uweigand@de.ibm.com>

	* symtab.c (skip_prologue_using_sal): Consider a file
	change the same as an increased line number

gdb/testsuite/ChangeLog

2013-01-24  Tiago Stürmer Daitx  <tdaitx@linux.vnet.ibm.com>

	* gdb.base/prologue-include.c: New file.
	* gdb.base/prologue-include.exp: New file.
	* gdb.base/prologue-include.h: New file.



diff --git a/gdb/symtab.c b/gdb/symtab.c
index d40436a..b200b36 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -4905,6 +4905,10 @@ skip_prologue_using_sal (struct gdbarch *gdbarch,
CORE_ADDR func_addr)
 	     line mark the prologue -> body transition.  */
 	  if (sal.line >= prologue_sal.line)
 	    break;
+	  /* Likewise if we are in a different symtab altogether
+	     (e.g. within a file included via #include).  */
+	  if (sal.symtab != prologue_sal.symtab)
+	    break;
 
 	  /* The line number is smaller.  Check that it's from the
 	     same function, not something inlined.  If it's inlined,
diff --git a/gdb/testsuite/gdb.base/prologue-include.c
b/gdb/testsuite/gdb.base/prologue-include.c
new file mode 100644
index 0000000..c393e75
--- /dev/null
+++ b/gdb/testsuite/gdb.base/prologue-include.c
@@ -0,0 +1,25 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2013 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see
<http://www.gnu.org/licenses/>.  */
+
+int
+main (void)
+{
+  int i, j;
+#include "prologue-include.h"
+  return 0;
+}
+
diff --git a/gdb/testsuite/gdb.base/prologue-include.exp
b/gdb/testsuite/gdb.base/prologue-include.exp
new file mode 100644
index 0000000..ed378b8
--- /dev/null
+++ b/gdb/testsuite/gdb.base/prologue-include.exp
@@ -0,0 +1,26 @@
+# Copyright (C) 2013 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+standard_testfile
+
+if { [prepare_for_testing ${testfile}.exp ${testfile}] } {
+    return -1
+}
+
+set bp_main [gdb_get_line_number "break main" ${testfile}.h]
+
+gdb_test "break main" \
+    "Breakpoint.*at.* file .*$testfile.h, line $bp_main\\." \
+    "breakpoint main"
diff --git a/gdb/testsuite/gdb.base/prologue-include.h
b/gdb/testsuite/gdb.base/prologue-include.h
new file mode 100644
index 0000000..77843e0
--- /dev/null
+++ b/gdb/testsuite/gdb.base/prologue-include.h
@@ -0,0 +1,19 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2013 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see
<http://www.gnu.org/licenses/>.  */
+
+  i = 2; /* break main should stop here */
+  j = 2;