Re: [patch] info-fun-opt.exp

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

On Tue, 05 Jun 2012 08:35:06 +0200, Doug Evans wrote:
> (gdb) info fun foo
> ../../gdb.git/gdb/dwarf2read.c:3049: internal-error: dw2_find_pc_sect_symtab: Assertion `result != NULL' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session? (y or n) FAIL: gdb.opt/info-fun-opt.exp: info fun foo (GDB internal error)
> 
> 
> 2012-06-04  Doug Evans  <dje@google.com>
> 
> 	* gdb.opt/info-fun-opt.cc: New file.
> 	* gdb.opt/info-fun-opt.exp: New file.

I would prefer the patch below as a dependency on specific compiler output has
proven to be fragile.  In this case the important was ELF symbol:
	0000000000400750 W non-virtual thunk to M::foo()


Thanks,
Jan


gdb/testsuite/
2012-06-06  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.dwarf2/dw2-minsym-in-cu.S: New file.
	* gdb.dwarf2/dw2-minsym-in-cu.exp: New file.

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.S b/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.S
new file mode 100644
index 0000000..2f8068e
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.S
@@ -0,0 +1,108 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2004, 2007-2012 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/>.  */
+
+	.text
+.Lbegin_text1:
+
+	.globl main
+	.type main, %function
+main:
+.Lbegin_main:
+	.int 0
+.Lend_main:
+	.size main, .-main
+
+	.globl func2
+	.type func2, %function
+func2:
+	.int 0
+	.size func2, .-func2
+
+.Lend_text1:
+
+/* Debug information */
+
+	.section .debug_info
+.Lcu1_begin:
+	/* CU header */
+	.4byte	.Lcu1_end - .Lcu1_start		/* Length of Compilation Unit */
+.Lcu1_start:
+	.2byte	2				/* DWARF Version */
+	.4byte	.Labbrev1_begin			/* Offset into abbrev section */
+	.byte	4				/* Pointer size */
+
+	/* CU die */
+	.uleb128 1				/* Abbrev: DW_TAG_compile_unit */
+	.4byte	.Lend_text1			/* DW_AT_high_pc */
+	.4byte	.Lbegin_text1			/* DW_AT_low_pc */
+	.ascii	"file1.txt\0"			/* DW_AT_name */
+	.ascii	"GNU C 3.3.3\0"			/* DW_AT_producer */
+	.byte	1				/* DW_AT_language (C) */
+
+	/* main */
+	.uleb128	2			/* Abbrev: DW_TAG_subprogram */
+	.byte		1			/* DW_AT_external */
+	.ascii		"main\0"		/* DW_AT_name */
+	.4byte	.Ldebug_ranges			/* DW_AT_ranges */
+
+	.byte		0			/* End of children of CU */
+.Lcu1_end:
+
+/* DW_AT_ranges.  */
+	.section	.debug_ranges
+.Ldebug_ranges:
+	.4byte	.Lbegin_main
+	.4byte	.Lend_main - 1
+	/* Make it slightly more interesting to set pending_addrmap_interesting.  */
+	.4byte	.Lend_main - 1
+	.4byte	.Lend_main
+	.4byte	0
+	.4byte	0
+
+/* Abbrev table */
+	.section .debug_abbrev
+.Labbrev1_begin:
+	.uleb128	1			/* Abbrev code */
+	.uleb128	0x11			/* DW_TAG_compile_unit */
+	.byte		1			/* has_children */
+	.uleb128	0x12			/* DW_AT_high_pc */
+	.uleb128	0x1			/* DW_FORM_addr */
+	.uleb128	0x11			/* DW_AT_low_pc */
+	.uleb128	0x1			/* DW_FORM_addr */
+	.uleb128	0x3			/* DW_AT_name */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0x25			/* DW_AT_producer */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0x13			/* DW_AT_language */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.uleb128	2			/* Abbrev code */
+	.uleb128	0x2e			/* DW_TAG_subprogram */
+	.byte		0			/* has_children */
+	.uleb128	0x3f			/* DW_AT_external */
+	.uleb128	0xc			/* DW_FORM_flag */
+	.uleb128	0x3			/* DW_AT_name */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0x55			/* DW_AT_ranges */
+	.uleb128	0x6			/* DW_FORM_data4 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.exp b/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.exp
new file mode 100644
index 0000000..60e80c9
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-minsym-in-cu.exp
@@ -0,0 +1,34 @@
+# Copyright 2004-2005, 2007-2012 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/>.
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0  
+}
+
+# This testfile has reproducibility only with cc-with-index.sh.
+
+set testfile "dw2-minsym-in-cu"
+set srcfile ${testfile}.S
+set executable ${testfile}
+
+if [prepare_for_testing ${testfile}.exp ${executable} ${srcfile}] {
+    return -1
+}
+
+# Ask for address which is still located in this CU but not described by
+# any DIE.
+gdb_test "info fun func2"