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PING^2: [RFA/RFC] fix PR gdb/22670 (pb looking up some symbols when they have a linkage name) (was: "Re: [RFC] regresssion(internal-error) printing subprogram argument")
- From: Joel Brobecker <brobecker at adacore dot com>
- To: gdb-patches at sourceware dot org
- Date: Mon, 19 Mar 2018 14:21:58 -0700
- Subject: PING^2: [RFA/RFC] fix PR gdb/22670 (pb looking up some symbols when they have a linkage name) (was: "Re: [RFC] regresssion(internal-error) printing subprogram argument")
- References: <832dbb30-7c2b-40ed-c03c-654bd1e2ea32@redhat.com> <20180117091332.z7bqu4aljudq33sw@adacore.com> <20180126035055.vbjtowj6q5ftbwiz@adacore.com> <21bfbb6a-bb10-812b-c34a-d367321e8d5e@redhat.com> <20180129103841.kdkomcjbuwiat5b4@adacore.com> <250976c6-6e7a-6a8e-b9f2-a57f5b92b965@redhat.com> <20180130035612.xghiskhiweftijxi@adacore.com> <20180205095659.y5jzjj2e5bx6pjyf@adacore.com> <20180209090919.lmwjll72hccopjsk@adacore.com> <20180221030210.xzthyal2cysn5s72@adacore.com>
On Wed, Feb 21, 2018 at 07:02:11AM +0400, Joel Brobecker wrote:
> > > All in all, I think a better solution would be to put that information
> > > directly in the language_defn itself, via a new "attribute".
> > > Something like a...
> >
> > I ended up choosing this approach. lookup names is still a bit
> > foggy for me, so the comments I wrote and/or the name of the
> > new language_defn attribute might be a bit off. As always, I am
> > grateful for suggestions :).
> >
> > gdb/ChangeLog:
> >
> > PR gdb/22670
> > * dwarf2read.c (dwarf2_physname): Do not return the demangled
> > symbol name is the CU's language stores symbol names in linkage
> > format.
> > * language.h (struct language_defn)
> > <la_store_sym_names_in_linkage_form_p>: New field. Adjust
> > all instances of this struct.
> >
> > gdb/testsuite/ChangeLog:
> >
> > * gdb.ada/maint_with_ada.exp: Remove PR gdb/22670 setup_kfail.
> >
> > * gdb.ada/notcplusplus: New testcase.
> >
> > * gdb.base/c-linkage-name.c: New file.
> > * gdb.base/c-linkage-name.exp: New testcase.
> >
> > Tested on x86_64-linux.
> > This also passes AdaCore's internal GDB testsuite.
I'm thinking of pushing this patch at some point, since it has been
waiting for a review for a quite a while, now. If it's lack of time
and you'd like a little more time before I push, please let me know!
> Any comment on this patch?
>
> Thanks!
>
> > >From c22aef84cc86097d6d8b654b0586a3fbc1ff6af3 Mon Sep 17 00:00:00 2001
> > From: Joel Brobecker <brobecker@adacore.com>
> > Date: Fri, 9 Feb 2018 02:13:34 -0500
> > Subject: [PATCH] problem looking up some symbols when they have a linkage name
> >
> > This patch fixes a known failure in gdb.ada/maint_with_ada.exp
> > (maintenance check-psymtabs). Another way to witness the same
> > issue is by considering the following Ada declarations...
> >
> > type Wrapper is record
> > A : Integer;
> > end record;
> > u00045 : constant Wrapper := (A => 16#060287af#);
> > pragma Export (C, u00045, "symada__cS");
> >
> > ... which declares a variable name "u00045" but with a linkage
> > name which is "symada__cS". This variable is a record with one
> > component, the Ada equivalent of a struct with one field in C.
> > Trying to print that variable's value currently yields:
> >
> > (gdb) p /x <symada__cS>
> > 'symada(char, signed)' has unknown type; cast it to its declared type
> >
> > This indicates that GDB was only able to find the minimal symbol,
> > but not the full symbol. The expected output is:
> >
> > (gdb) print /x <symada__cS>
> > $1 = (a => 0x60287af)
> >
> > The error message gives a hint about what's happening: We processed
> > the symbol through gdb_demangle, which in the case of this particular
> > symbol name, ends up matching the C++ naming scheme. As a result,
> > the demangler transforms our symbol name into 'symada(char, signed)',
> > thus breaking Ada lookups.
> >
> > This patch fixes the issue by first introducing a new language_defn
> > attribute called la_store_sym_names_in_linkage_form_p, which is a boolean
> > to be set to true for the few languages that do not want their symbols
> > to have their names stored in demangled form, and false otherwise.
> > We then use this language attribute to skip the call to gdb_demangle
> > for all languages whose la_store_sym_names_in_linkage_form_p is true.
> >
> > In terms of the selection of languages for which the new attribute
> > is set to true, the selection errs on the side of preserving the
> > existing behavior, and only changes the behavior for the languages
> > where we are certain storing symbol names in demangling form is not
> > needed. It is conceivable that other languages might be in the same
> > situation, but I not knowing in detail the symbol name enconding
> > strategy, I decided to play it safe and let other language maintainers
> > potentially adjust their language if it makes sense to do so.
> >
> > gdb/ChangeLog:
> >
> > PR gdb/22670
> > * dwarf2read.c (dwarf2_physname): Do not return the demangled
> > symbol name is the CU's language stores symbol names in linkage
> > format.
> > * language.h (struct language_defn)
> > <la_store_sym_names_in_linkage_form_p>: New field. Adjust
> > all instances of this struct.
> >
> > gdb/testsuite/ChangeLog:
> >
> > * gdb.ada/maint_with_ada.exp: Remove PR gdb/22670 setup_kfail.
> >
> > * gdb.ada/notcplusplus: New testcase.
> >
> > * gdb.base/c-linkage-name.c: New file.
> > * gdb.base/c-linkage-name.exp: New testcase.
> >
> > Tested on x86_64-linux.
> > This also passes AdaCore's internal GDB testsuite.
> > ---
> > gdb/ada-lang.c | 1 +
> > gdb/c-lang.c | 4 +++
> > gdb/d-lang.c | 1 +
> > gdb/dwarf2read.c | 6 +++-
> > gdb/f-lang.c | 1 +
> > gdb/go-lang.c | 1 +
> > gdb/language.c | 2 ++
> > gdb/language.h | 20 +++++++++++++
> > gdb/m2-lang.c | 1 +
> > gdb/objc-lang.c | 1 +
> > gdb/opencl-lang.c | 1 +
> > gdb/p-lang.c | 1 +
> > gdb/rust-lang.c | 1 +
> > gdb/testsuite/gdb.ada/maint_with_ada.exp | 1 -
> > gdb/testsuite/gdb.ada/notcplusplus.exp | 45 ++++++++++++++++++++++++++++
> > gdb/testsuite/gdb.ada/notcplusplus/foo.adb | 21 +++++++++++++
> > gdb/testsuite/gdb.ada/notcplusplus/pck.adb | 21 +++++++++++++
> > gdb/testsuite/gdb.ada/notcplusplus/pck.ads | 19 ++++++++++++
> > gdb/testsuite/gdb.ada/notcplusplus/ver.ads | 22 ++++++++++++++
> > gdb/testsuite/gdb.base/c-linkage-name.c | 44 ++++++++++++++++++++++++++++
> > gdb/testsuite/gdb.base/c-linkage-name.exp | 47 ++++++++++++++++++++++++++++++
> > 21 files changed, 259 insertions(+), 2 deletions(-)
> > create mode 100644 gdb/testsuite/gdb.ada/notcplusplus.exp
> > create mode 100644 gdb/testsuite/gdb.ada/notcplusplus/foo.adb
> > create mode 100644 gdb/testsuite/gdb.ada/notcplusplus/pck.adb
> > create mode 100644 gdb/testsuite/gdb.ada/notcplusplus/pck.ads
> > create mode 100644 gdb/testsuite/gdb.ada/notcplusplus/ver.ads
> > create mode 100644 gdb/testsuite/gdb.base/c-linkage-name.c
> > create mode 100644 gdb/testsuite/gdb.base/c-linkage-name.exp
> >
> > diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
> > index 0da58d9..7f99a2e 100644
> > --- a/gdb/ada-lang.c
> > +++ b/gdb/ada-lang.c
> > @@ -14521,6 +14521,7 @@ extern const struct language_defn ada_language_defn = {
> > ada_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + true, /* la_store_sym_names_in_linkage_form_p */
> > ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
> > basic_lookup_transparent_type, /* lookup_transparent_type */
> > ada_la_decode, /* Language specific symbol demangler */
> > diff --git a/gdb/c-lang.c b/gdb/c-lang.c
> > index a0b553e..658c7f7 100644
> > --- a/gdb/c-lang.c
> > +++ b/gdb/c-lang.c
> > @@ -853,6 +853,7 @@ extern const struct language_defn c_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + true, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > @@ -998,6 +999,7 @@ extern const struct language_defn cplus_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > cplus_skip_trampoline, /* Language specific skip_trampoline */
> > "this", /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > cp_lookup_transparent_type, /* lookup_transparent_type */
> > gdb_demangle, /* Language specific symbol demangler */
> > @@ -1052,6 +1054,7 @@ extern const struct language_defn asm_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + true, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > @@ -1106,6 +1109,7 @@ extern const struct language_defn minimal_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + true, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > diff --git a/gdb/d-lang.c b/gdb/d-lang.c
> > index e0afe48..688ae98 100644
> > --- a/gdb/d-lang.c
> > +++ b/gdb/d-lang.c
> > @@ -229,6 +229,7 @@ extern const struct language_defn d_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline. */
> > "this",
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > d_lookup_symbol_nonlocal,
> > basic_lookup_transparent_type,
> > d_demangle, /* Language specific symbol demangler. */
> > diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
> > index d651725..b4c087f 100644
> > --- a/gdb/dwarf2read.c
> > +++ b/gdb/dwarf2read.c
> > @@ -11142,7 +11142,11 @@ dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
> > if (mangled != NULL)
> > {
> >
> > - if (cu->language == language_go)
> > + if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p)
> > + {
> > + /* Do nothing (do not demangle the symbol name). */
> > + }
> > + else if (cu->language == language_go)
> > {
> > /* This is a lie, but we already lie to the caller new_symbol.
> > new_symbol assumes we return the mangled name.
> > diff --git a/gdb/f-lang.c b/gdb/f-lang.c
> > index 74f5622..81922f7 100644
> > --- a/gdb/f-lang.c
> > +++ b/gdb/f-lang.c
> > @@ -269,6 +269,7 @@ extern const struct language_defn f_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> >
> > diff --git a/gdb/go-lang.c b/gdb/go-lang.c
> > index 022b8de..e9cba77 100644
> > --- a/gdb/go-lang.c
> > +++ b/gdb/go-lang.c
> > @@ -590,6 +590,7 @@ extern const struct language_defn go_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline. */
> > NULL, /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal,
> > basic_lookup_transparent_type,
> > go_demangle, /* Language specific symbol demangler. */
> > diff --git a/gdb/language.c b/gdb/language.c
> > index 0d8604b..22199e0 100644
> > --- a/gdb/language.c
> > +++ b/gdb/language.c
> > @@ -864,6 +864,7 @@ const struct language_defn unknown_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > unk_lang_trampoline, /* Language specific skip_trampoline */
> > "this", /* name_of_this */
> > + true, /* store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > unk_lang_demangle, /* Language specific symbol demangler */
> > @@ -915,6 +916,7 @@ const struct language_defn auto_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > unk_lang_trampoline, /* Language specific skip_trampoline */
> > "this", /* name_of_this */
> > + false, /* store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > unk_lang_demangle, /* Language specific symbol demangler */
> > diff --git a/gdb/language.h b/gdb/language.h
> > index 06b42ae..029de4a 100644
> > --- a/gdb/language.h
> > +++ b/gdb/language.h
> > @@ -264,6 +264,26 @@ struct language_defn
> >
> > const char *la_name_of_this;
> >
> > + /* True if the symbols names should be stored in GDB's data structures
> > + for minimal/partial/full symbols using their linkage (aka mangled)
> > + form; false if the symbol names should be demangled first.
> > +
> > + Most languages implement symbol lookup by comparing the demangled
> > + names, in which case it is advantageous to store that information
> > + already demangled, and so would set this field to false.
> > +
> > + On the other hand, some languages have opted for doing symbol
> > + lookups by comparing mangled names instead, for reasons usually
> > + specific to the language. Those languages should set this field
> > + to true.
> > +
> > + And finally, other languages such as C or Asm do not have
> > + the concept of mangled vs demangled name, so those languages
> > + should set this field to true as well, to prevent any accidental
> > + demangling through an unrelated language's demangler. */
> > +
> > + const bool la_store_sym_names_in_linkage_form_p;
> > +
> > /* This is a function that lookup_symbol will call when it gets to
> > the part of symbol lookup where C looks up static and global
> > variables. */
> > diff --git a/gdb/m2-lang.c b/gdb/m2-lang.c
> > index 11ccab3..6e6434b 100644
> > --- a/gdb/m2-lang.c
> > +++ b/gdb/m2-lang.c
> > @@ -377,6 +377,7 @@ extern const struct language_defn m2_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > diff --git a/gdb/objc-lang.c b/gdb/objc-lang.c
> > index c714ec3..4f7dc36 100644
> > --- a/gdb/objc-lang.c
> > +++ b/gdb/objc-lang.c
> > @@ -389,6 +389,7 @@ extern const struct language_defn objc_language_defn = {
> > default_read_var_value, /* la_read_var_value */
> > objc_skip_trampoline, /* Language specific skip_trampoline */
> > "self", /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > objc_demangle, /* Language specific symbol demangler */
> > diff --git a/gdb/opencl-lang.c b/gdb/opencl-lang.c
> > index 268c3c5..9c5b90c 100644
> > --- a/gdb/opencl-lang.c
> > +++ b/gdb/opencl-lang.c
> > @@ -1065,6 +1065,7 @@ extern const struct language_defn opencl_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > diff --git a/gdb/p-lang.c b/gdb/p-lang.c
> > index 03db2df..3ff7f56 100644
> > --- a/gdb/p-lang.c
> > +++ b/gdb/p-lang.c
> > @@ -439,6 +439,7 @@ extern const struct language_defn pascal_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > "this", /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > NULL, /* Language specific symbol demangler */
> > diff --git a/gdb/rust-lang.c b/gdb/rust-lang.c
> > index 5ff80b2..2d7c1f7 100644
> > --- a/gdb/rust-lang.c
> > +++ b/gdb/rust-lang.c
> > @@ -2290,6 +2290,7 @@ extern const struct language_defn rust_language_defn =
> > default_read_var_value, /* la_read_var_value */
> > NULL, /* Language specific skip_trampoline */
> > NULL, /* name_of_this */
> > + false, /* la_store_sym_names_in_linkage_form_p */
> > rust_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
> > basic_lookup_transparent_type,/* lookup_transparent_type */
> > gdb_demangle, /* Language specific symbol demangler */
> > diff --git a/gdb/testsuite/gdb.ada/maint_with_ada.exp b/gdb/testsuite/gdb.ada/maint_with_ada.exp
> > index 73da613..9ede035 100644
> > --- a/gdb/testsuite/gdb.ada/maint_with_ada.exp
> > +++ b/gdb/testsuite/gdb.ada/maint_with_ada.exp
> > @@ -32,7 +32,6 @@ gdb_breakpoint "adainit"
> > gdb_breakpoint "Var_Arr_Typedef"
> > gdb_breakpoint "Do_Nothing"
> >
> > -setup_kfail gdb/22670 "*-*-*"
> > gdb_test_no_output "maintenance check-psymtabs"
> >
> > gdb_test_no_output "maintenance check-symtabs"
> > diff --git a/gdb/testsuite/gdb.ada/notcplusplus.exp b/gdb/testsuite/gdb.ada/notcplusplus.exp
> > new file mode 100644
> > index 0000000..b2a24e8
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.ada/notcplusplus.exp
> > @@ -0,0 +1,45 @@
> > +# Copyright 2018 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/>.
> > +
> > +load_lib "ada.exp"
> > +
> > +if { [skip_ada_tests] } { return -1 }
> > +
> > +standard_ada_testfile foo
> > +
> > +if {[gdb_compile_ada "${srcfile}" "${binfile}" executable {debug}] != ""} {
> > + return -1
> > +}
> > +
> > +clean_restart ${testfile}
> > +
> > +gdb_test "print /x <symada__cS>" \
> > + "= \\(a => 0x60287af\\)" \
> > + "print <symada__cS> before loading symbols from ver.ads"
> > +
> > +# Force the partial symbosl from ver.ads to be expanded into full symbols.
> > +
> > +gdb_test \
> > + "list ver.ads:16" \
> > + [multi_line ".*" \
> > + "16\\s+package Ver is" \
> > + "17\\s+type Wrapper is record" \
> > + "18\\s+A : Integer;" \
> > + "19\\s+end record;" \
> > + "20\\s+u00045 : constant Wrapper := \\(A => 16#060287af#\\);"]
> > +
> > +gdb_test "print /x <symada__cS>" \
> > + "= \\(a => 0x60287af\\)" \
> > + "print <symada__cS> after loading symbols from ver.ads"
> > diff --git a/gdb/testsuite/gdb.ada/notcplusplus/foo.adb b/gdb/testsuite/gdb.ada/notcplusplus/foo.adb
> > new file mode 100644
> > index 0000000..89e42f9
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.ada/notcplusplus/foo.adb
> > @@ -0,0 +1,21 @@
> > +-- Copyright 2018 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/>.
> > +
> > +with Pck; use Pck;
> > +with Ver; use Ver;
> > +procedure Foo is
> > +begin
> > + Do_Nothing (u00045'Address);
> > +end Foo;
> > diff --git a/gdb/testsuite/gdb.ada/notcplusplus/pck.adb b/gdb/testsuite/gdb.ada/notcplusplus/pck.adb
> > new file mode 100644
> > index 0000000..dcfb306
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.ada/notcplusplus/pck.adb
> > @@ -0,0 +1,21 @@
> > +-- Copyright 2018 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/>.
> > +
> > +package body Pck is
> > + procedure Do_Nothing (A : System.Address) is
> > + begin
> > + null;
> > + end Do_Nothing;
> > +end Pck;
> > diff --git a/gdb/testsuite/gdb.ada/notcplusplus/pck.ads b/gdb/testsuite/gdb.ada/notcplusplus/pck.ads
> > new file mode 100644
> > index 0000000..33e369e
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.ada/notcplusplus/pck.ads
> > @@ -0,0 +1,19 @@
> > +-- Copyright 2018 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/>.
> > +
> > +with System;
> > +package Pck is
> > + procedure Do_Nothing (A : System.Address);
> > +end Pck;
> > diff --git a/gdb/testsuite/gdb.ada/notcplusplus/ver.ads b/gdb/testsuite/gdb.ada/notcplusplus/ver.ads
> > new file mode 100644
> > index 0000000..8f264d0
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.ada/notcplusplus/ver.ads
> > @@ -0,0 +1,22 @@
> > +-- Copyright 2018 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/>.
> > +
> > +package Ver is
> > + type Wrapper is record
> > + A : Integer;
> > + end record;
> > + u00045 : constant Wrapper := (A => 16#060287af#);
> > + pragma Export (C, u00045, "symada__cS");
> > +end Ver;
> > diff --git a/gdb/testsuite/gdb.base/c-linkage-name.c b/gdb/testsuite/gdb.base/c-linkage-name.c
> > new file mode 100644
> > index 0000000..925004c
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.base/c-linkage-name.c
> > @@ -0,0 +1,44 @@
> > +/* This testcase is part of GDB, the GNU debugger.
> > +
> > + Copyright 2018 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/>. */
> > +
> > +struct wrapper
> > +{
> > + int a;
> > +};
> > +
> > +/* Create a global variable whose name in the assembly code
> > + (aka the "linkage name") is different from the name in
> > + the source code. The goal is to create a symbol described
> > + in DWARF using a DW_AT_linkage_name attribute, with a name
> > + which follows the C++ mangling.
> > +
> > + In this particular case, we chose "symada__cS" which, if it were
> > + demangled, would translate to "symada (char, signed)". */
> > +struct wrapper mundane asm ("symada__cS") = {0x060287af};
> > +
> > +void
> > +do_something (struct wrapper *w)
> > +{
> > + w->a++;
> > +}
> > +
> > +int
> > +main (void)
> > +{
> > + do_something (&mundane);
> > + return 0;
> > +}
> > diff --git a/gdb/testsuite/gdb.base/c-linkage-name.exp b/gdb/testsuite/gdb.base/c-linkage-name.exp
> > new file mode 100644
> > index 0000000..c80a530
> > --- /dev/null
> > +++ b/gdb/testsuite/gdb.base/c-linkage-name.exp
> > @@ -0,0 +1,47 @@
> > +# Copyright 2018 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/>.
> > +
> > +# This file is part of the gdb testsuite. It is intended to test that
> > +# gdb can correctly print arrays with indexes for each element of the
> > +# array.
> > +
> > +standard_testfile .c
> > +
> > +if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
> > + untested "failed to compile"
> > + return -1
> > +}
> > +
> > +clean_restart ${binfile}
> > +
> > +# Try to print MUNDANE, but using its linkage name.
> > +
> > +gdb_test "print symada__cS" \
> > + " = {a = 100829103}" \
> > + "print symada__cS before partial symtab expansion"
> > +
> > +# Force the symbols to be expanded for the unit that contains
> > +# our symada__cS symbol by, e.g. inserting a breakpoint on one
> > +# of the founction also provided by the same using.
> > +
> > +gdb_test "break main" \
> > + "Breakpoint $decimal at $hex: file .*$srcfile, line $decimal\\."
> > +
> > +# Try to print MUNDANE using its linkage name again, after partial
> > +# symtab expansion.
> > +
> > +gdb_test "print symada__cS" \
> > + " = {a = 100829103}" \
> > + "print symada__cS after partial symtab expansion"
> > --
> > 2.1.4
> >
>
>
> --
> Joel
--
Joel