From 078a020797210f4d8f9491bbfe16ec31e9efb652 Mon Sep 17 00:00:00 2001 From: Keith Seitz Date: Wed, 29 Aug 2018 15:12:24 -0700 Subject: 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. --- gdb/NEWS | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'gdb/NEWS') diff --git a/gdb/NEWS b/gdb/NEWS index 0ad8ae5..75436b0 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -3,6 +3,14 @@ *** Changes since GDB 8.2 +* GDB now has experimental support for the compilation and injection of + C++ source code into the inferior. This beta release does not include + support for several language features, such as templates, constructors, + and operators. + + This feature requires GCC 7.1 or higher built with libcp1.so + (the C++ plug-in). + * GDB and GDBserver now support IPv6 connections. IPv6 addresses can be passed using the '[ADDRESS]:PORT' notation, or the regular 'ADDRESS:PORT' method. @@ -15,6 +23,12 @@ * New commands +set debug compile-cplus-types +show debug compile-cplus-types + Control the display of debug output about type conversion in the + C++ compile feature. Commands have no effect while compiliong + for other languages. + frame apply [all | COUNT | -COUNT | level LEVEL...] [FLAG]... COMMAND Apply a command to some frames. FLAG arguments allow to control what output to produce and how to handle -- cgit v1.1