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

Tiago Stürmer Daitx
2013-01-24T15:01:06Z

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 StÃ¼rmer 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;