gdb/
authorJan Kratochvil <jan.kratochvil@redhat.com>
Wed, 29 Sep 2010 22:32:52 +0000 (22:32 +0000)
committerJan Kratochvil <jan.kratochvil@redhat.com>
Wed, 29 Sep 2010 22:32:52 +0000 (22:32 +0000)
Fix GDB crash on inferior calls with self-referencing classes.
* gnu-v3-abi.c (gnuv3_pass_by_reference): Do not call itself on static
member fields.

gdb/testsuite/
Fix GDB crash on inferior calls with self-referencing classes.
* gdb.dwarf2/dw2-cp-infcall-ref-static.exp: New file.
* gdb.dwarf2/dw2-cp-infcall-ref-static-main.c: New file.
* gdb.dwarf2/dw2-cp-infcall-ref-static.S: New file.

gdb/ChangeLog
gdb/gnu-v3-abi.c
gdb/testsuite/ChangeLog
gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static-main.c [new file with mode: 0644]
gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.S [new file with mode: 0644]
gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.exp [new file with mode: 0644]

index c9c452428f4087082624ff99c33316c04921963c..fc02717a88e817ff30b552c08b112cd3a9ab28ed 100644 (file)
@@ -1,3 +1,9 @@
+2010-09-29  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+       Fix GDB crash on inferior calls with self-referencing classes.
+       * gnu-v3-abi.c (gnuv3_pass_by_reference): Do not call itself on static
+       member fields.
+
 2010-09-29  Doug Evans  <dje@google.com>
 
        Workaround for gcc/45682.
index f9d4f49d56b3f5f6e3df8cad1de6d357760f2f5f..b1ddf029f820f39c7a6a3b279f52e153648c870a 100644 (file)
@@ -835,9 +835,10 @@ gnuv3_pass_by_reference (struct type *type)
      by reference, so does this class.  Similarly for members, which
      are constructed whenever this class is.  We do not need to worry
      about recursive loops here, since we are only looking at members
-     of complete class type.  */
+     of complete class type.  Also ignore any static members.  */
   for (fieldnum = 0; fieldnum < TYPE_NFIELDS (type); fieldnum++)
-    if (gnuv3_pass_by_reference (TYPE_FIELD_TYPE (type, fieldnum)))
+    if (! field_is_static (&TYPE_FIELD (type, fieldnum))
+        && gnuv3_pass_by_reference (TYPE_FIELD_TYPE (type, fieldnum)))
       return 1;
 
   return 0;
index 3ae8411478fa58f816341f1412d015803e9c4dd5..a8a27fb5c4497155e9a787783c045c0196966e66 100644 (file)
@@ -1,3 +1,10 @@
+2010-09-29  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+       Fix GDB crash on inferior calls with self-referencing classes.
+       * gdb.dwarf2/dw2-cp-infcall-ref-static.exp: New file.
+       * gdb.dwarf2/dw2-cp-infcall-ref-static-main.c: New file.
+       * gdb.dwarf2/dw2-cp-infcall-ref-static.S: New file.
+
 2010-09-24  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
        Fix lost siginfo_t for inferior calls.
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static-main.c b/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static-main.c
new file mode 100644 (file)
index 0000000..492beb9
--- /dev/null
@@ -0,0 +1,51 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010 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/>.  */
+
+/* class C
+     {
+     public:
+       static C s;
+     };
+   C C::s;
+   C f()
+   {
+     return C::s;
+   }  */
+
+asm (".globl cu_text_start");
+asm ("cu_text_start:");
+
+asm (".globl f_start");
+asm ("f_start:");
+
+void
+f (void)
+{
+}
+
+asm (".globl f_end");
+asm ("f_end:");
+
+int
+main (void)
+{
+  f ();
+  return 0;
+}
+
+asm (".globl cu_text_end");
+asm ("cu_text_end:");
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.S b/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.S
new file mode 100644 (file)
index 0000000..cb73349
--- /dev/null
@@ -0,0 +1,115 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010 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/>.  */
+
+/* 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  cu_text_start                   /* DW_AT_low_pc */
+       .4byte  cu_text_end                     /* DW_AT_high_pc */
+       .ascii  "file1.txt\0"                   /* DW_AT_name */
+       .ascii  "GNU C 3.3.3\0"                 /* DW_AT_producer */
+       .byte   4                               /* DW_AT_language (DW_LANG_C_plus_plus) */
+
+.Ltype_class:
+       .uleb128        3                       /* Abbrev: DW_TAG_class_type */
+       .ascii          "C\0"                   /* DW_AT_name */
+
+       .uleb128        4                       /* Abbrev: DW_TAG_member */
+       .ascii          "s\0"                   /* DW_AT_name */
+       .4byte          .Ltype_class-.Lcu1_begin /* DW_AT_type */
+       .byte           1                       /* DW_AT_declaration */
+       .byte           1                       /* DW_AT_external */
+
+       .byte           0                       /* End of children of DW_TAG_class_type */
+
+       .uleb128        5                       /* Abbrev: DW_TAG_subprogram */
+       .ascii          "f\0"                   /* DW_AT_name */
+       .4byte          .Ltype_class-.Lcu1_begin /* DW_AT_type */
+       .4byte          f_start                 /* DW_AT_low_pc */
+       .4byte          f_end                   /* DW_AT_high_pc */
+
+       .byte           0                       /* End of children of CU */
+
+.Lcu1_end:
+
+/* Abbrev table */
+       .section .debug_abbrev
+.Labbrev1_begin:
+       .uleb128        1                       /* Abbrev code */
+       .uleb128        0x11                    /* DW_TAG_compile_unit */
+       .byte           1                       /* has_children */
+       .uleb128        0x11                    /* DW_AT_low_pc */
+       .uleb128        0x1                     /* DW_FORM_addr */
+       .uleb128        0x12                    /* DW_AT_high_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        3                       /* Abbrev code */
+       .uleb128        0x2                     /* DW_TAG_class_type */
+       .byte           1                       /* has_children */
+       .uleb128        0x3                     /* DW_AT_name */
+       .uleb128        0x8                     /* DW_FORM_string */
+       .byte           0x0                     /* Terminator */
+       .byte           0x0                     /* Terminator */
+
+       .uleb128        4                       /* Abbrev code */
+       .uleb128        0xd                     /* DW_TAG_member */
+       .byte           0                       /* has_children */
+       .uleb128        0x3                     /* DW_AT_name */
+       .uleb128        0x8                     /* DW_FORM_string */
+       .uleb128        0x49                    /* DW_AT_type */
+       .uleb128        0x13                    /* DW_FORM_ref4 */
+       .uleb128        0x3c                    /* DW_AT_declaration */
+       .uleb128        0xc                     /* DW_FORM_flag */
+       .uleb128        0x3f                    /* DW_AT_external */
+       .uleb128        0xc                     /* DW_FORM_flag */
+       .byte           0x0                     /* Terminator */
+       .byte           0x0                     /* Terminator */
+
+       .uleb128        5                       /* Abbrev code */
+       .uleb128        0x2e                    /* DW_TAG_subprogram */
+       .byte           0                       /* has_children */
+       .uleb128        0x3                     /* DW_AT_name */
+       .uleb128        0x8                     /* DW_FORM_string */
+       .uleb128        0x49                    /* DW_AT_type */
+       .uleb128        0x13                    /* DW_FORM_ref4 */
+       .uleb128        0x11                    /* DW_AT_low_pc */
+       .uleb128        0x1                     /* DW_FORM_addr */
+       .uleb128        0x12                    /* DW_AT_high_pc */
+       .uleb128        0x1                     /* DW_FORM_addr */
+       .byte           0x0                     /* Terminator */
+       .byte           0x0                     /* Terminator */
+
+       .byte           0x0                     /* Terminator */
+       .byte           0x0                     /* Terminator */
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.exp b/gdb/testsuite/gdb.dwarf2/dw2-cp-infcall-ref-static.exp
new file mode 100644 (file)
index 0000000..08ef528
--- /dev/null
@@ -0,0 +1,49 @@
+# Copyright 2010 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/>.
+
+# Check that GDB can call C++ functions whose parameters or return values have
+# type containing a static member of the same type.
+
+# Still no C++ compiler is used.
+if { [skip_cplus_tests] } { continue }
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+# For now pick a sampling of likely targets.
+if {![istarget *-*-linux*]
+    && ![istarget *-*-gnu*]
+    && ![istarget *-*-elf*]
+    && ![istarget *-*-openbsd*]
+    && ![istarget arm-*-eabi*]
+    && ![istarget powerpc-*-eabi*]} {
+    return 0  
+}
+
+set testfile "dw2-cp-infcall-ref-static"
+if { [prepare_for_testing ${testfile}.exp ${testfile} [list ${testfile}-main.c ${testfile}.S] {}] } {
+    return -1
+}
+
+if ![runto_main] then {
+    return -1
+}
+
+# main is not provided by DWARF.
+gdb_test_no_output "set language c++"
+
+# There are no mangled names in DWARF to suggest the v3 ABI.
+gdb_test_no_output "set cp-abi gnu-v3"
+
+# GDB could crash.  There is no DW_AT_location so it is <optimized out>.
+gdb_test "p f()" { = {static s = <optimized out>}}
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