2020-01-01 07:20:01 +01:00
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# Copyright 2015-2020 Free Software Foundation, Inc.
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C++ compile support
This patch adds *basic* support for C++ to the compile feature. It does
most simple type conversions, including everything that C compile does and
your basic "with-classes" type of C++.
I've written a new compile-support.exp support file which adds a new test
facility for automating and simplifying "compile print" vs "compile code"
testing. See testsuite/lib/compile-support.exp and CompileExpression
for more on that. The tests use this facility extensively.
This initial support has several glaring omissions:
- No template support at all
I have follow-on patches for this, but they add much complexity
to this "basic" support. Consequently, they will be submitted separately.
- Cannot print functions
The code template needs tweaking, and I simply haven't gotten to it yet.
- So-called "special function" support is not included
Using constructors, destructors, operators, etc will not work. I have
follow-on patches for that, but they require some work because of the
recent churn in symbol searching.
- There are several test suite references to "compile/1234" bugs.
I will file bugs and update the test suite's bug references before pushing
these patches.
The test suite started as a copy of the original C-language support, but
I have written tests to exercise the basic functionality of the plug-in.
I've added a new option for outputting debug messages for C++ type-conversion
("debug compile-cplus-types").
gdb/ChangeLog:
* Makefile.in (SUBDIR_GCC_COMPILE_SRCS): Add compile-cplus-symbols.c
and compile-cplus-types.c.
(HFILES_NO_SRCDIR): Add gcc-cp-plugin.h.
* c-lang.c (cplus_language_defn): Set C++ compile functions.
* c-lang.h (cplus_get_compile_context, cplus_compute_program):
Declare.
* compile/compile-c-support.c: Include compile-cplus.h.
(load_libcompile): Templatize.
(get_compile_context): "New" function.
(c_get_compile_context): Use get_compile_context.
(cplus_get_compile_context): New function.
(cplus_push_user_expression, cplus_pop_user_expression)
(cplus_add_code_header, cplus_add_input, cplus_compile_program)
(cplus_compute_program): Define new structs/functions.
* compile/compile-cplus-symmbols.c: New file.
* compile/compile-cplus-types.c: New file.
* compile/compile-cplus.h: New file.
* compile/compile-internal.h (debug_compile_oracle, GCC_TYPE_NONE):
Declare.
* compile/compile-object-load.c (get_out_value_type): Use
strncmp_iw when comparing symbol names.
(compile_object_load): Add mst_bss and mst_data.
* compile/compile.c (_initialize_compile): Remove
-Wno-implicit-function-declaration from `compile_args'.
* compile/gcc-cp-plugin.h: New file.
* NEWS: Mention C++ compile support and new debug options.
gdb/testsuite/ChangeLog:
* gdb.compile/compile-cplus-anonymous.cc: New file.
* gdb.compile/compile-cplus-anonymous.exp: New file.
* gdb.compile/compile-cplus-array-decay.cc: New file.
* gdb.compile/compile-cplus-array-decay.exp: New file.
* gdb.compile/compile-cplus-inherit.cc: New file.
* gdb.compile/compile-cplus-inherit.exp: New file.
* gdb.compile/compile-cplus-member.cc: New file.
* gdb.compile/compile-cplus-member.exp: New file.
* gdb.compile/compile-cplus-method.cc: New file.
* gdb.compile/compile-cplus-method.exp: New file.
* gdb.compile/compile-cplus-mod.c: "New" file.
* gdb.compile/compile-cplus-namespace.cc: New file.
* gdb.compile/compile-cplus-namespace.exp: New file.
* gdb.compile/compile-cplus-nested.cc: New file.
* gdb.compile/compile-cplus-nested.exp: New file.
* gdb.compile/compile-cplus-print.c: "New" file.
* gdb.compile/compile-cplus-print.exp: "New" file.
* gdb.compile/compile-cplus-virtual.cc: New file.
* gdb.compile/compile-cplus-virtual.exp: New file.
* gdb.compile/compile-cplus.c: "New" file.
* gdb.compile/compile-cplus.exp: "New" file.
* lib/compile-support.exp: New file.
doc/ChangeLog:
* gdb.texinfo (Compiling and injecting code in GDB): Document
set/show "compile-oracle" and "compile-cplus-types" commands.
2018-08-30 00:12:24 +02:00
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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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# Virtual method/inheritance tests for GDB's C++ compile feature.
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load_lib compile-support.exp
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standard_testfile .cc
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if {[skip_cplus_tests]} {
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untested "skipping C++ tests"
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return
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}
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if {[prepare_for_testing $testfile $testfile $srcfile \
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{debug nowarnings c++}]} {
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return -1
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}
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if {![runto_main]} {
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untested "could not run to main"
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return -1
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}
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if {[skip_compile_feature_tests]} {
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untested \
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"compile command not supported (could not find libcc1 shared library?)"
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return -1
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}
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gdb_breakpoint [gdb_get_line_number "break here" $srcfile]
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gdb_continue_to_breakpoint "testing location"
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CompileExpression::new "var"
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CompileExpression::test "b.doit ()" 2
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CompileExpression::test "c.doit ()" 3
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CompileExpression::test "d.doit ()" 4
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CompileExpression::test "ap->doit ()" 4
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CompileExpression::test "b.doit2 ()" 22
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CompileExpression::test "c.doit2 ()" 33
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CompileExpression::test "d.doit2 ()" 44
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CompileExpression::test "ap->doit2 ()" 44
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CompileExpression::test "b.doit3 ()" -3
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CompileExpression::test "c.doit3 ()" -3
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CompileExpression::test "d.doit3 ()" -3
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# These two tests are "disabled". They represent new/future features.
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# CompileExpression::test \
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[concat "struct ABC {int doit2() { return 3333; }} abc;" \
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"var = abc.doit2()"] \
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3333 -explicit
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# CompileExpression::test \
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[concat "struct ABC : A {int doit2() { return 4444; }} abc;" \
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"var = abc.doit2()"] \
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4444 -explicit
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# Test some error conditions
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gdb_test "compile code A a;" \
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".*cannot declare variable .a. to be of abstract type.*Compilation failed."
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