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gdb/gdb-gnat-dwarf-crash-1of3.patch

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commit adde2bff0757e89175ede493f03b86953d0d9352
Author: Doug Evans <xdje42@gmail.com>
Date: Thu Feb 20 09:13:53 2014 -0800
Fix PR symtab/16581
* dwarf2read.c (struct die_info): New member in_process.
(reset_die_in_process): New function.
(process_die): Set it at the start, reset when returning.
(inherit_abstract_dies): Only call process_die if origin_child_die
not already being processed.
testsuite/
* gdb.dwarf2/dw2-icycle.S: New file.
* gdb.dwarf2/dw2-icycle.c: New file.
* gdb.dwarf2/dw2-icycle.exp: New file.
### a/gdb/ChangeLog
### b/gdb/ChangeLog
## -1,3 +1,14 @@
+2014-02-20 lin zuojian <manjian2006@gmail.com>
+ Joel Brobecker <brobecker@adacore.com>
+ Doug Evans <xdje42@gmail.com>
+
+ PR symtab/16581
+ * dwarf2read.c (struct die_info): New member in_process.
+ (reset_die_in_process): New function.
+ (process_die): Set it at the start, reset when returning.
+ (inherit_abstract_dies): Only call process_die if origin_child_die
+ not already being processed.
+
2014-02-20 Joel Brobecker <brobecker@adacore.com>
* windows-nat.c (handle_unload_dll): Add function documentation.
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -1225,6 +1225,9 @@ struct die_info
type derived from this DIE. */
unsigned char building_fullname : 1;
+ /* True if this die is in process. PR 16581. */
+ unsigned char in_process : 1;
+
/* Abbrev number */
unsigned int abbrev;
@@ -8008,11 +8011,28 @@ process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
}
}
+/* Reset the in_process bit of a die. */
+
+static void
+reset_die_in_process (void *arg)
+{
+ struct die_info *die = arg;
+ die->in_process = 0;
+}
+
/* Process a die and its children. */
static void
process_die (struct die_info *die, struct dwarf2_cu *cu)
{
+ struct cleanup *in_process;
+
+ /* We should only be processing those not already in process. */
+ gdb_assert (!die->in_process);
+
+ die->in_process = 1;
+ in_process = make_cleanup (reset_die_in_process,die);
+
switch (die->tag)
{
case DW_TAG_padding:
@@ -7762,6 +7782,8 @@ process_die (struct die_info *die, struc
new_symbol (die, NULL, cu);
break;
}
+
+ do_cleanups (in_process);
}
/* DWARF name computation. */
@@ -10967,8 +10989,12 @@ inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
if (offsetp >= offsets_end
|| offsetp->sect_off > origin_child_die->offset.sect_off)
{
- /* Found that ORIGIN_CHILD_DIE is really not referenced. */
- process_die (origin_child_die, origin_cu);
+ /* Found that ORIGIN_CHILD_DIE is really not referenced.
+ Check whether we're already processing ORIGIN_CHILD_DIE.
+ This can happen with mutually referenced abstract_origins.
+ PR 16581. */
+ if (!origin_child_die->in_process)
+ process_die (origin_child_die, origin_cu);
}
origin_child_die = sibling_die (origin_child_die);
}
### a/gdb/testsuite/ChangeLog
### b/gdb/testsuite/ChangeLog
## -1,3 +1,12 @@
+2014-02-20 lin zuojian <manjian2006@gmail.com>
+ Joel Brobecker <brobecker@adacore.com>
+ Doug Evans <xdje42@gmail.com>
+
+ PR symtab/16581
+ * gdb.dwarf2/dw2-icycle.S: New file.
+ * gdb.dwarf2/dw2-icycle.c: New file.
+ * gdb.dwarf2/dw2-icycle.exp: New file.
+
2014-02-19 Siva Chandra Reddy <sivachandra@google.com>
* gdb.python/py-value-cc.cc: Improve test case to enable testing
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-icycle.S
@@ -0,0 +1,258 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2014 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
+
+.Ltext0:
+ .type p__top__middle__inside.3062, @function
+p__top__middle__inside.3062:
+.LFB4:
+ .file 1 "p.adb"
+ .4byte 0
+.LBE6:
+
+ .globl p__top
+ .type p__top, @function
+p__top:
+.LFB2:
+ .4byte 0
+.LFE2:
+.Letext0:
+
+ .section .debug_info,"",@progbits
+.Ldebug_info0:
+ .4byte .Ledebug_info0 - .Lsdebug_info0 /* Length of CU Info */
+.Lsdebug_info0:
+ .2byte 0x4 /* DWARF version number */
+ .4byte .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
+ .byte 0x4 /* Pointer Size (in bytes) */
+ .uleb128 0x1 /* (DIE (0xb) DW_TAG_compile_unit) */
+ .ascii "GNU Ada 4.9.0 20140126\0" /* DW_AT_producer */
+ .byte 0xd /* DW_AT_language */
+ .ascii "p.adb\0" /* DW_AT_name */
+ .ascii "/tmp\0" /* DW_AT_comp_dir */
+ .4byte .Ltext0 /* DW_AT_low_pc */
+ .4byte .Letext0-.Ltext0 /* DW_AT_high_pc */
+.S0x142:
+ .uleb128 0x8 /* (DIE (0x142) DW_TAG_base_type) */
+ .byte 0x4 /* DW_AT_byte_size */
+ .byte 0x5 /* DW_AT_encoding */
+ .ascii "integer\0" /* DW_AT_name */
+
+ .uleb128 0x13 /* (DIE (0x1b4) DW_TAG_subprogram) */
+ /* DW_AT_external */
+ .ascii "p__top\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (p.adb) */
+ .byte 0x3 /* DW_AT_decl_line */
+ .4byte .LFB2 /* DW_AT_low_pc */
+ .4byte .LFE2-.LFB2 /* DW_AT_high_pc */
+ .uleb128 0x1 /* DW_AT_frame_base */
+ .byte 0x9c /* DW_OP_call_frame_cfa */
+ /* DW_AT_GNU_all_call_sites */
+ .4byte .S0x4fc - .Ldebug_info0 /* DW_AT_sibling */
+.S0x1e0:
+ .uleb128 0x15 /* (DIE (0x1e0) DW_TAG_subprogram) */
+ .ascii "p__top__middle\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (p.adb) */
+ .byte 0x4 /* DW_AT_decl_line */
+ .byte 0x1 /* DW_AT_inline */
+ .4byte .S0x374 - .Ldebug_info0 /* DW_AT_sibling */
+.S0x202:
+ .uleb128 0x15 /* (DIE (0x202) DW_TAG_subprogram) */
+ .ascii "p__top__middle__inside\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (p.adb) */
+ .byte 0x5 /* DW_AT_decl_line */
+ .byte 0x1 /* DW_AT_inline */
+ .4byte .S0x225 - .Ldebug_info0 /* DW_AT_sibling */
+ .byte 0 /* end of children of DIE 0x202 */
+.S0x225:
+ .uleb128 0x18 /* (DIE (0x225) DW_TAG_subprogram) */
+ .4byte .S0x202 - .Ldebug_info0 /* DW_AT_abstract_origin */
+ .4byte .LFB4 /* DW_AT_low_pc */
+ .4byte .LBE6-.LFB4 /* DW_AT_high_pc */
+ .uleb128 0x1 /* DW_AT_frame_base */
+ .byte 0x9c /* DW_OP_call_frame_cfa */
+ .uleb128 0x1 /* DW_AT_static_link */
+ .byte 0x56 /* DW_OP_reg6 */
+ /* DW_AT_GNU_all_call_sites */
+ .uleb128 0x1a /* (DIE (0x247) DW_TAG_inlined_subroutine) */
+ .4byte .S0x1e0 - .Ldebug_info0 /* DW_AT_abstract_origin */
+ .4byte .LFB4 /* DW_AT_low_pc */
+ .4byte .LBE6-.LFB4 /* DW_AT_high_pc */
+ .byte 0x1 /* DW_AT_call_file (p.adb) */
+ .byte 0x14 /* DW_AT_call_line */
+ .4byte .S0x374 - .Ldebug_info0 /* DW_AT_sibling */
+ .byte 0 /* end of children of DIE 0x247 */
+ .byte 0 /* end of children of DIE 0x225 */
+ .byte 0 /* end of children of DIE 0x1e0 */
+.S0x374:
+ .uleb128 0x23 /* (DIE (0x382) DW_TAG_inlined_subroutine) */
+ .4byte .S0x1e0 - .Ldebug_info0 /* DW_AT_abstract_origin */
+ .4byte .LFB4 /* DW_AT_low_pc */
+ .4byte .LBE6-.LFB4 /* DW_AT_high_pc */
+ .byte 0x1 /* DW_AT_call_file (p.adb) */
+ .byte 0x1d /* DW_AT_call_line */
+ .byte 0 /* end of children of DIE 0x382 */
+ .byte 0 /* end of children of DIE 0x1b4 */
+.S0x4fc:
+ .uleb128 0x28 /* (DIE (0x52e) DW_TAG_subprogram) */
+ /* DW_AT_external */
+ .ascii "__gnat_rcheck_PE_Explicit_Raise\0" /* DW_AT_name */
+ /* DW_AT_artificial */
+ /* DW_AT_declaration */
+ .byte 0 /* end of children of DIE 0x52e */
+ .byte 0 /* end of children of DIE 0xb */
+.Ledebug_info0:
+
+ .section .debug_abbrev,"",@progbits
+.Ldebug_abbrev0:
+ .uleb128 0x1 /* (abbrev code) */
+ .uleb128 0x11 /* (TAG: DW_TAG_compile_unit) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x25 /* (DW_AT_producer) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x13 /* (DW_AT_language) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x1b /* (DW_AT_comp_dir) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x8 /* (abbrev code) */
+ .uleb128 0x24 /* (TAG: DW_TAG_base_type) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0xb /* (DW_AT_byte_size) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3e /* (DW_AT_encoding) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .byte 0
+ .byte 0
+ .uleb128 0x13 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x3f /* (DW_AT_external) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x40 /* (DW_AT_frame_base) */
+ .uleb128 0x18 /* (DW_FORM_exprloc) */
+ .uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x15 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x20 /* (DW_AT_inline) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x18 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x40 /* (DW_AT_frame_base) */
+ .uleb128 0x18 /* (DW_FORM_exprloc) */
+ .uleb128 0x48 /* (DW_AT_static_link) */
+ .uleb128 0x18 /* (DW_FORM_exprloc) */
+ .uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .byte 0
+ .byte 0
+ .uleb128 0x1a /* (abbrev code) */
+ .uleb128 0x1d /* (TAG: DW_TAG_inlined_subroutine) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x58 /* (DW_AT_call_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x59 /* (DW_AT_call_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x23 /* (abbrev code) */
+ .uleb128 0x1d /* (TAG: DW_TAG_inlined_subroutine) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x58 /* (DW_AT_call_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x59 /* (DW_AT_call_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .byte 0
+ .byte 0
+ .uleb128 0x28 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x3f /* (DW_AT_external) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x34 /* (DW_AT_artificial) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .uleb128 0x3c /* (DW_AT_declaration) */
+ .uleb128 0x19 /* (DW_FORM_flag_present) */
+ .byte 0
+ .byte 0
+ .byte 0
+ .byte 0
+ .byte 0
+
+ .section .debug_line
+.Lline1_begin:
+ .byte 0
+
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-icycle.c
@@ -0,0 +1,24 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2004-2014 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/>. */
+
+/* Dummy main function. */
+
+int
+main()
+{
+ return 0;
+}
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-icycle.exp
@@ -0,0 +1,46 @@
+# Copyright 2014 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/>.
+
+# This test exercises PR 16581.
+
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+ return 0
+}
+
+standard_testfile .S .c
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} \
+ [list $srcfile $srcfile2] {nodebug}] } {
+ return -1
+}
+
+# We are trying to verify that the partial symtab to symtab expansion
+# for the debugging info hand-coded in our assembly file does not cause
+# the debugger to crash (infinite recursion). To facilitate the test,
+# start the debugger with -readnow. This force expansion as soon as
+# the objfile is loaded.
+
+set saved_gdbflags $GDBFLAGS
+set GDBFLAGS "$GDBFLAGS -readnow"
+clean_restart ${testfile}
+set GDBFLAGS $saved_gdbflags
+
+# And just to be sure that the debugger did not crash after having
+# expanded our symbols, do a life-check.
+
+gdb_test "echo life check\\n" "life check"
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