468 lines
15 KiB
Text
468 lines
15 KiB
Text
# This test code is part of GDB, the GNU debugger.
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# Copyright 2003, 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Auxiliary function to check for known problems.
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#
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# EXPECTED_STRING is the string expected by the test.
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#
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# ACTUAL_STRING is the actual string output by gdb.
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#
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# ERRATA_TABLE is a list of lines of the form:
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#
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# { expected-string broken-string {eval-block} }
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#
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# If there is a line for the given EXPECTED_STRING, and if the
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# ACTUAL_STRING output by gdb is the same as the BROKEN_STRING in the
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# table, then I eval the eval-block.
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proc cp_check_errata { expected_string actual_string errata_table } {
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foreach erratum $errata_table {
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if { "$expected_string" == [lindex $erratum 0]
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&& "$actual_string" == [lindex $erratum 1] } then {
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eval [lindex $erratum 2]
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}
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}
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}
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# Test ptype of a class.
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#
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# Different C++ compilers produce different output. To accommodate all
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# the variations listed below, I read the output of "ptype" and process
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# each line, matching it to the class description given in the
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# parameters.
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#
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# IN_COMMAND and IN_TESTNAME are the command and testname for
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# gdb_test_multiple. If IN_TESTNAME is the empty string, then it
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# defaults to IN_COMMAND.
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#
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# IN_KEY is "class" or "struct". For now, I ignore it, and allow either
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# "class" or "struct" in the output, as long as the access specifiers all
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# work out okay.
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#
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# IN_TAG is the class tag or structure tag.
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#
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# IN_CLASS_TABLE is a list of class information. Each entry contains a
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# keyword and some values. The keywords and their values are:
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#
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# { base "base-declaration" }
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#
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# the class has a base with the given declaration.
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#
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# { vbase "name" }
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#
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# the class has a virtual base pointer with the given name. this
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# is for gcc 2.95.3, which emits ptype entries for the virtual base
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# pointers. the vbase list includes both indirect and direct
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# virtual base classes (indeed, a virtual base is usually
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# indirect), so this information cannot be derived from the base
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# declarations.
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#
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# { field "access" "declaration" }
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#
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# the class has a data field with the given access type and the
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# given declaration.
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#
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# { method "access" "declaration" }
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#
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# the class has a member function with the given access type
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# and the given declaration.
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#
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# If you test the same class declaration more than once, you can specify
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# IN_CLASS_TABLE as "ibid". "ibid" means: look for a previous class
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# table that had the same IN_KEY and IN_TAG, and re-use that table.
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#
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# IN_TAIL is the expected text after the close brace, specifically the "*"
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# in "struct { ... } *". This is an optional parameter. The default
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# value is "", for no tail.
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#
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# IN_ERRATA_TABLE is a list of errata entries. See cp_check_errata for the
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# format of the errata table. Note: the errata entries are not subject to
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# demangler syntax adjustment, so you have to make a bigger table
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# with lines for each output variation.
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#
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# gdb can vary the output of ptype in several ways:
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#
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# . CLASS/STRUCT
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#
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# The output can start with either "class" or "struct", depending on
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# what the symbol table reader in gdb decides. This is usually
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# unrelated to the original source code.
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#
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# dwarf-2 debug info distinguishes class/struct, but gdb ignores it
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# stabs+ debug info does not distinguish class/struct
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# hp debug info distinguishes class/struct, and gdb honors it
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#
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# I tried to accommodate this with regular expressions such as
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# "((class|struct) A \{ public:|struct A \{)", but that turns into a
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# hairy mess because of optional private virtual base pointers and
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# optional public synthetic operators. This is the big reason I gave
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# up on regular expressions and started parsing the output.
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#
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# . REDUNDANT ACCESS SPECIFIER
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#
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# In "class { private: ... }" or "struct { public: ... }", gdb might
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# or might not emit a redundant initial access specifier, depending
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# on the gcc version.
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#
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# . VIRTUAL BASE POINTERS
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#
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# If a class has virtual bases, either direct or indirect, the class
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# will have virtual base pointers. With gcc 2.95.3, gdb prints lines
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# for these virtual base pointers. This does not happen with gcc
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# 3.3.4, gcc 3.4.1, or hp acc A.03.45.
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#
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# I accept these lines. These lines are optional; but if I see one of
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# these lines, then I expect to see all of them.
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#
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# Note: drow considers printing these lines to be a bug in gdb.
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#
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# . SYNTHETIC METHODS
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#
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# A C++ compiler may synthesize some methods: an assignment
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# operator, a copy constructor, a constructor, and a destructor. The
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# compiler might include debug information for these methods.
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#
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# dwarf-2 gdb does not show these methods
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# stabs+ gdb shows these methods
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# hp gdb does not show these methods
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#
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# I accept these methods. These lines are optional, and any or
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# all of them might appear, mixed in anywhere in the regular methods.
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#
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# With gcc v2, the synthetic copy-ctor and ctor have an additional
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# "int" parameter at the beginning, the "in-charge" flag.
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#
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# . DEMANGLER SYNTAX VARIATIONS
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#
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# Different demanglers produce "int foo(void)" versus "int foo()",
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# "const A&" versus "const A &", and so on.
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#
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# TESTED WITH
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#
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# gcc 2.95.3 -gdwarf-2
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# gcc 2.95.3 -gstabs+
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# gcc 3.3.4 -gdwarf-2
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# gcc 3.3.4 -gstabs+
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# gcc 3.4.1 -gdwarf-2
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# gcc 3.4.1 -gstabs+
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# gcc HEAD 20040731 -gdwarf-2
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# gcc HEAD 20040731 -gstabs+
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#
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# TODO
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#
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# Tagless structs.
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#
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# "A*" versus "A *" and "A&" versus "A &" in user methods.
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#
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# Test with hp ACC.
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#
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# -- chastain 2004-08-07
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proc cp_test_ptype_class { in_command in_testname in_key in_tag in_class_table { in_tail "" } { in_errata_table { } } } {
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global gdb_prompt
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set wsopt "\[\r\n\t \]*"
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# The test name defaults to the command.
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if { "$in_testname" == "" } then { set in_testname "$in_command" }
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# Save class tables in a history array for reuse.
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global cp_class_table_history
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if { $in_class_table == "ibid" } then {
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if { ! [info exists cp_class_table_history("$in_key,$in_tag") ] } then {
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fail "$in_testname // bad ibid"
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return
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}
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set in_class_table $cp_class_table_history("$in_key,$in_tag")
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} else {
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set cp_class_table_history("$in_key,$in_tag") $in_class_table
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}
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# Split the class table into separate tables.
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set list_bases { }
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set list_vbases { }
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set list_fields { }
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set list_methods { }
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foreach class_line $in_class_table {
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switch [lindex $class_line 0] {
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"base" { lappend list_bases [lindex $class_line 1] }
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"vbase" { lappend list_vbases [lindex $class_line 1] }
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"field" { lappend list_fields [lrange $class_line 1 2] }
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"method" { lappend list_methods [lrange $class_line 1 2] }
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default { fail "$in_testname // bad line in class table: $class_line"; return; }
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}
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}
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# Construct a list of synthetic operators.
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# These are: { count ccess-type regular-expression }.
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set list_synth { }
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lappend list_synth [list 0 "public" "$in_tag & operator=\\($in_tag const ?&\\);"]
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lappend list_synth [list 0 "public" "$in_tag\\((int,|) ?$in_tag const ?&\\);"]
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lappend list_synth [list 0 "public" "$in_tag\\((int|void|)\\);"]
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# Actually do the ptype.
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set parse_okay 0
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gdb_test_multiple "$in_command" "$in_testname // parse failed" {
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-re "type = (struct|class)${wsopt}(\[A-Za-z0-9_\]*)${wsopt}((:\[^\{\]*)?)${wsopt}\{(.*)\}${wsopt}(\[^\r\n\]*)\[\r\n\]+$gdb_prompt $" {
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set parse_okay 1
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set actual_key $expect_out(1,string)
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set actual_tag $expect_out(2,string)
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set actual_base_string $expect_out(3,string)
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set actual_body $expect_out(5,string)
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set actual_tail $expect_out(6,string)
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}
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}
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if { ! $parse_okay } then { return }
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# Check the actual key. It would be nice to require that it match
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# the input key, but gdb does not support that. For now, accept any
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# $actual_key as long as the access property of each field/method
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# matches.
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switch "$actual_key" {
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"class" { set access "private" }
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"struct" { set access "public" }
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default {
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cp_check_errata "class" "$actual_key" $in_errata_table
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cp_check_errata "struct" "$actual_key" $in_errata_table
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fail "$in_testname // wrong key: $actual_key"
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return
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}
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}
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# Check the actual tag.
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if { "$actual_tag" != "$in_tag" } then {
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cp_check_errata "$in_tag" "$actual_tag" $in_errata_table
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fail "$in_testname // wrong tag: $actual_tag"
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return
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}
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# Check the actual bases.
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# First parse them into a list.
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set list_actual_bases { }
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if { "$actual_base_string" != "" } then {
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regsub "^:${wsopt}" $actual_base_string "" actual_base_string
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set list_actual_bases [split $actual_base_string ","]
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}
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# Check the base count.
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if { [llength $list_actual_bases] < [llength $list_bases] } then {
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fail "$in_testname // too few bases"
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return
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}
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if { [llength $list_actual_bases] > [llength $list_bases] } then {
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fail "$in_testname // too many bases"
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return
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}
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# Check each base.
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foreach actual_base $list_actual_bases {
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set actual_base [string trim $actual_base]
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set base [lindex $list_bases 0]
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if { "$actual_base" != "$base" } then {
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cp_check_errata "$base" "$actual_base" $in_errata_table
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fail "$in_testname // wrong base: $actual_base"
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return
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}
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set list_bases [lreplace $list_bases 0 0]
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}
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# Parse each line in the body.
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set last_was_access 0
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set vbase_match 0
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foreach actual_line [split $actual_body "\r\n"] {
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# Chomp the line.
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set actual_line [string trim $actual_line]
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if { "$actual_line" == "" } then { continue }
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# Access specifiers.
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if { [regexp "^(public|protected|private)${wsopt}:\$" "$actual_line" s0 s1] } then {
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set access "$s1"
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if { $last_was_access } then {
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fail "$in_testname // redundant access specifier"
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return
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}
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set last_was_access 1
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continue
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} else {
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set last_was_access 0
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}
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# Optional virtual base pointer.
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if { [ llength $list_vbases ] > 0 } then {
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set vbase [lindex $list_vbases 0]
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if { [ regexp "$vbase \\*(_vb.|_vb\\\$|__vb_)\[0-9\]*$vbase;" $actual_line ] } then {
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if { "$access" != "private" } then {
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cp_check_errata "private" "$access" $in_errata_table
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fail "$in_testname // wrong access specifier for virtual base: $access"
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return
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}
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set list_vbases [lreplace $list_vbases 0 0]
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set vbase_match 1
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continue
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}
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}
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# Data field.
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if { [llength $list_fields] > 0 } then {
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set field_access [lindex [lindex $list_fields 0] 0]
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set field_decl [lindex [lindex $list_fields 0] 1]
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if { "$actual_line" == "$field_decl" } then {
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if { "$access" != "$field_access" } then {
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cp_check_errata "$field_access" "$access" $in_errata_table
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fail "$in_testname // wrong access specifier for field: $access"
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return
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}
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set list_fields [lreplace $list_fields 0 0]
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continue
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}
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# Data fields must appear before synths and methods.
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cp_check_errata "$field_decl" "$actual_line" $in_errata_table
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fail "$in_testname // unrecognized line type 1: $actual_line"
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return
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}
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# Method function.
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if { [llength $list_methods] > 0 } then {
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set method_access [lindex [lindex $list_methods 0] 0]
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set method_decl [lindex [lindex $list_methods 0] 1]
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if { "$actual_line" == "$method_decl" } then {
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if { "$access" != "$method_access" } then {
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cp_check_errata "$method_access" "$access" $in_errata_table
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fail "$in_testname // wrong access specifier for method: $access"
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return
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}
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set list_methods [lreplace $list_methods 0 0]
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continue
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}
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# gcc 2.95.3 shows "foo()" as "foo(void)".
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regsub -all "\\(\\)" $method_decl "(void)" method_decl
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if { "$actual_line" == "$method_decl" } then {
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if { "$access" != "$method_access" } then {
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cp_check_errata "$method_access" "$access" $in_errata_table
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fail "$in_testname // wrong access specifier for method: $access"
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return
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}
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set list_methods [lreplace $list_methods 0 0]
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continue
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}
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}
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# Synthetic operators. These are optional and can be mixed in
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# with the methods in any order, but duplicates are wrong.
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#
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# This test must come after the user methods, so that a user
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# method which matches a synth-method pattern is treated
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# properly as a user method.
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set synth_match 0
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for { set isynth 0 } { $isynth < [llength $list_synth] } { incr isynth } {
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set synth [lindex $list_synth $isynth]
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set synth_count [lindex $synth 0]
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set synth_access [lindex $synth 1]
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set synth_re [lindex $synth 2]
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if { [ regexp "$synth_re" "$actual_line" ] } then {
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if { "$access" != "$synth_access" } then {
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cp_check_errata "$synth_access" "$access" $in_errata_table
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fail "$in_testname // wrong access specifier for synthetic operator: $access"
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return
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}
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if { $synth_count > 0 } then {
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cp_check_errata "$actual_line" "$actual_line" $in_errata_table
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fail "$in_testname // duplicate synthetic operator: $actual_line"
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}
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# Update the count in list_synth.
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incr synth_count
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set synth [list $synth_count $synth_access "$synth_re"]
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set list_synth [lreplace $list_synth $isynth $isynth $synth]
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# Match found.
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set synth_match 1
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break
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}
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}
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if { $synth_match } then { continue }
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# Unrecognized line.
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if { [llength $list_methods] > 0 } then {
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set method_decl [lindex [lindex $list_methods 0] 1]
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cp_check_errata "$method_decl" "$actual_line" $in_errata_table
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}
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fail "$in_testname // unrecognized line type 2: $actual_line"
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return
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}
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# Check for missing elements.
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if { $vbase_match } then {
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if { [llength $list_vbases] > 0 } then {
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fail "$in_testname // missing virtual base pointers"
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return
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}
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}
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if { [llength $list_fields] > 0 } then {
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fail "$in_testname // missing fields"
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return
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}
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if { [llength $list_methods] > 0 } then {
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fail "$in_testname // missing methods"
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return
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}
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# Check the tail.
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set actual_tail [string trim $actual_tail]
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if { "$actual_tail" != "$in_tail" } then {
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cp_check_errata "$in_tail" "$actual_tail" $in_errata_table
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fail "$in_testname // wrong tail: $actual_tail"
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return
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}
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# It all worked!
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pass "$in_testname"
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return
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}
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