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authorDoug Evans <dje@google.com>2012-04-25 14:07:23 +0000
committerDoug Evans <dje@google.com>2012-04-25 14:07:23 +0000
commita766d390bb857383a5f9ae80a102e1f8705f4c2e (patch)
tree056e6d8d57aee5d234d9ed4619a27306dfec3dd7 /gdb/go-valprint.c
parente65f9ffb8e49431537404712a5b1eed310964cb0 (diff)
downloadbinutils-gdb-a766d390bb857383a5f9ae80a102e1f8705f4c2e.tar.gz
Initial pass at Go language support.
* NEWS: Mention Go. * Makefile.in (SFILES): Add go-exp.y, go-lang.c, go-typeprint.c, go-valprint.c. (COMMON_OBS): Add go-lang.o, go-val.print.o, go-typeprint.o. (YYFILES): Add go-exp.c. (YYOBJ): Add go-exp.o. (local-maintainer-clean): Delete go-exp.c. * defs.h (enum language): Add language_go. * dwarf2read.c: #include "go-lang.h". (fixup_go_packaging): New function. (process_full_comp_unit): Call it when processing Go CUs. (dwarf2_physname): Add Go support. (read_file_scope): Handle missing language spec for GNU Go. (set_cu_language): Handle DW_LANG_Go. * go-exp.y: New file. * go-lang.h: New file. * go-lang.c: New file. * go-typeprint.c: New file. * go-valprint.c: New file. * symtab.c: #include "go-lang.h". (symbol_set_language): Handle language_go. (symbol_find_demangled_name, symbol_set_names): Ditto. (symbol_natural_name, demangle_for_lookup, find_main_name): Ditto. testsuite/ * configure.ac: Create gdb.go/Makefile. * configure: Regenerate. * gdb.base/default.exp: Add "go" to "set language" testing. * gdb.go/Makefile.in: New file. * gdb.go/basic-types.exp: New file. * gdb.go/chan.exp: New file. * gdb.go/chan.go: New file. * gdb.go/handcall.exp: New file. * gdb.go/handcall.go: New file. * gdb.go/hello.exp: New file. * gdb.go/hello.go: New file. * gdb.go/integers.exp: New file. * gdb.go/integers.go: New file. * gdb.go/methods.exp: New file. * gdb.go/methods.go: New file. * gdb.go/package.exp: New file. * gdb.go/package1.go: New file. * gdb.go/package2.go: New file. * gdb.go/print.exp: New file. * gdb.go/strings.exp: New file. * gdb.go/strings.go: New file. * gdb.go/types.exp: New file. * gdb.go/types.go: New file. * gdb.go/unsafe.exp: New file. * gdb.go/unsafe.go: New file. * lib/future.exp: Add Go support. (gdb_find_go, gdb_find_go_linker): New procs. (gdb_default_target_compile): Add Go support. * lib/gdb.exp (skip_go_tests): New proc. * lib/go.exp: New file. doc/ * gdb.texinfo (Supported Languages): Add Go. (Go): New node.
Diffstat (limited to 'gdb/go-valprint.c')
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1 files changed, 120 insertions, 0 deletions
diff --git a/gdb/go-valprint.c b/gdb/go-valprint.c
new file mode 100644
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--- /dev/null
+++ b/gdb/go-valprint.c
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+/* Support for printing Go values for GDB, the GNU debugger.
+
+ Copyright (C) 2012 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ 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/>.
+
+ NOTE: This currently only provides special support for printing gccgo
+ strings. 6g objects are handled in Python.
+ The remaining gccgo types may also be handled in Python.
+ Strings are handled specially here, at least for now, in case the Python
+ support is unavailable. */
+
+#include "defs.h"
+#include "gdbtypes.h"
+#include "gdbcore.h"
+#include "go-lang.h"
+#include "c-lang.h"
+#include "valprint.h"
+
+/* Print a Go string.
+
+ Note: We assume
+ gdb_assert (go_classify_struct_type (type) == GO_TYPE_STRING). */
+
+static void
+print_go_string (struct type *type, const gdb_byte *valaddr,
+ int embedded_offset, CORE_ADDR address,
+ struct ui_file *stream, int recurse,
+ const struct value *val,
+ const struct value_print_options *options)
+{
+ struct gdbarch *gdbarch = get_type_arch (type);
+ struct type *elt_ptr_type = TYPE_FIELD_TYPE (type, 0);
+ struct type *elt_type = TYPE_TARGET_TYPE (elt_ptr_type);
+ LONGEST length;
+ /* TODO(dje): The encapsulation of what a pointer is belongs in value.c.
+ I.e. If there's going to be unpack_pointer, there should be
+ unpack_value_field_as_pointer. Do this until we can get
+ unpack_value_field_as_pointer. */
+ LONGEST addr;
+
+ gdb_assert (valaddr == value_contents_for_printing_const (val));
+
+ if (! unpack_value_field_as_long (type, valaddr, embedded_offset, 0,
+ val, &addr))
+ error (_("Unable to read string address"));
+
+ if (! unpack_value_field_as_long (type, valaddr, embedded_offset, 1,
+ val, &length))
+ error (_("Unable to read string length"));
+
+ /* TODO(dje): Print address of struct or actual string? */
+ if (options->addressprint)
+ fputs_filtered (paddress (gdbarch, addr), stream);
+
+ if (length < 0)
+ {
+ fputs_filtered (_("<invalid length: "), stream);
+ fputs_filtered (plongest (addr), stream);
+ fputs_filtered (">", stream);
+ return;
+ }
+
+ /* TODO(dje): Perhaps we should pass "UTF8" for ENCODING.
+ The target encoding is a global switch.
+ Either choice is problematic. */
+ val_print_string (elt_type, NULL, addr, length, stream, options);
+}
+
+/* Implements the la_val_print routine for language Go. */
+
+void
+go_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
+ CORE_ADDR address, struct ui_file *stream, int recurse,
+ const struct value *val,
+ const struct value_print_options *options)
+{
+ CHECK_TYPEDEF (type);
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ {
+ enum go_type go_type = go_classify_struct_type (type);
+
+ switch (go_type)
+ {
+ case GO_TYPE_STRING:
+ if (! options->raw)
+ {
+ print_go_string (type, valaddr, embedded_offset, address,
+ stream, recurse, val, options);
+ return;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ /* Fall through. */
+
+ default:
+ c_val_print (type, valaddr, embedded_offset, address, stream,
+ recurse, val, options);
+ break;
+ }
+}