Correct the disassembly of the PC-relative immediate argument of the
MIPS16 synthetic LA, LW, DLA and LD instructions and do not mask the
LSB, which in this case is a part of the data address rather than the
ISA bit and has to be fully presented.
opcodes/
* mips-dis.c (print_insn_arg): Only clear the ISA bit for jumps
and branches and not synthetic data instructions.
binutils/
* testsuite/binutils-all/mips/mips16-undecoded.d: Adjust the
disassembly of PC-relative LA and LW synthetic instructions.
As discussed here: https://sourceware.org/ml/gdb-patches/2017-04/msg00157.html
A gap is not an instruction and it should not pretend to be one.
gdb.Record.instruction_history is now a list of gdb.RecordInstruction and
gdb.RecordGap objects. This allows the user to deal with Gaps in the record
in a more sane way.
The user would always get the instruction_history and function_call_history
objects of the current thread, not the thread for which the gdb.Record object
was created.
The attached testcase fails without this patch and passes with the patch.
Check if GNU2 TLS really works before running GNU2 TLS tests.
* testsuite/ld-i386/tls.exp: Run GNU2 TLS tests only if there
is working GNU2 TLS support.
* testsuite/ld-x86-64/tls.exp: Likewise.
* testsuite/lib/ld-lib.exp (check_gnu2_tls_available): New proc.
The existing reloc offset range tests didn't catch small negative
offsets less than the size of the reloc field.
PR 21432
* reloc.c (reloc_offset_in_range): New function.
(bfd_perform_relocation, bfd_install_relocation): Use it.
(_bfd_final_link_relocate): Likewise.
This has been on my TODO list for a while. There's a really old bug
about this (PR testsuite/8595), and there was no reason for
environ.exp to be specific for hppa* targets. So this patch removes
this constraint, modernizes the testcase, and cleans up some things.
Most of the tests remained, and some were rewritten (especially the
one that checks if "show environment" works, which is something kind
of hard to do).
As a bonus, I'm adding a separated info-program.exp file containing
all the tests related to "info program" that were present on
environ.exp.
Tested locally, everything still passes.
gdb/testsuite/ChangeLog:
2017-04-28 Sergio Durigan Junior <sergiodj@redhat.com>
PR testsuite/8595
* gdb.base/environ.exp: Make test available in all architectures.
Move bits related to "info program" testing to
gdb.base/info-program.exp. Rewrite tests to use the two new
procedures mentione below.
(test_set_show_env_var) New procedure.
(test_set_show_env_var_equal): Likewise.
* gdb.base/info-program.exp: New file.
With regcache ctor, we can use it to create local object in
get_return_value (), so that the cleanup can be removed.
gdb:
2017-04-28 Yao Qi <yao.qi@linaro.org>
* infcmd.c (get_return_value): Use regcache ctor, and remove
cleanup.
This patch adds a tag dispatch ctor to create read-only regcache from
a write-through regcache, also this patch deletes copy ctor and
assignment operator.
gdb:
2017-04-28 Yao Qi <yao.qi@linaro.org>
Pedro Alves <palves@redhat.com>
* regcache.c (regcache::regcache): New tag dispatch ctor.
(do_cooked_read): Moved above.
(regcache_dup): Use the tag dispatch ctor..
* regcache.h (regcache): Declare ctor, delete copy ctor and
assignment operator, remove friend regcache_dup.
regcache_dup, in fact, is to create a readonly regcache from a
non-readonly regcache. This patch adds an assert that src is not
readonly.
gdb:
2017-04-28 Yao Qi <yao.qi@linaro.org>
* regcache.c (regcache_dup): Assert !src->m_readonly_p and
call method save instead of regcache_cpy.
* regcache.h (struct regcache): Make regcache_dup a friend.
This patch makes lm_info_windows a "real" class. It initializes the field
and replaces XCNEW/xfree with new/delete.
gdb/ChangeLog:
* windows-nat.c (struct lm_info_windows): Initialize field.
(windows_make_so): Allocate lm_info_windows with new.
(windows_free_so): Free lm_info_windows with delete.
This patch makes lm_info_darwin a "real" class. It initializes the
field and replaces XCNEW/xfree with new/delete.
gdb/ChangeLog:
* solib-darwin.c (struct lm_info_darwin): Initialize field.
(darwin_current_sos): Allocate lm_info_darwin with new, remove
cleanup.
(darwin_free_so): Free lm_info_darwin with delete.
This patch makes lm_info_svr4 a "real" class. It initializes fields,
uses bool and replaces XCNEW/xfree with new/delete.
The memcpy in svr4_copy_library_list is replaced by a usage of the
default copy constructor.
gdb/ChangeLog:
* solib-svr4.h (struct lm_info_svr4): Initialize fields.
<l_addr_p>: Change type to bool.
* solib-svr4.c (lm_info_read): Allocate lm_info_svr4 with new.
(svr4_free_so): Free lm_info_svr4 with delete.
(svr4_copy_library_list): Replace memcpy with call to copy
constructor.
(library_list_start_library, svr4_default_sos): Allocate
lm_info_svr4 with new.
This patch makes lm_info_target a "real" class. It adds a destructor,
uses std::string, initializes the fields and replaces XCNEW/xfree with
new/delete.
gdb/ChangeLog:
* solib-target.c (struct lm_info_target): Add destructor,
initialize fields.
<name>: Change type to std::string.
(library_list_start_library): Allocate lm_info_target with new.
(solib_target_free_library_list): Free lm_info_target with
delete.
(solib_target_current_sos): Adapt to std::string.
(solib_target_free_so): Free lm_info_target with delete.
This patches makes lm_info_frv a "real" class. It adds a destructor,
initializes the fields and replaces XCNEW/xfree with new/delete.
gdb/ChangeLog:
* solib-frv.c (struct lm_info_frv): Add destructor, initialize
fields.
(frv_current_sos): Allocate lm_info_frv with new.
(frv_relocate_main_executable): Free lm_info_frv with delete,
allocate with new.
(frv_clear_solib, frv_free_so): Free lm_info_frv with delete.
This patch fixes the indentation of lm_info_frv, so that the real
changes of the following patch are not lost in the reformatting.
gdb/ChangeLog:
* solib-frv.c (struct lm_info_frv): Fix indentation.
This patches makes lm_info_dsbt a "real" class. It introduces a
destructor, initializes the field and replaces XCNEW/xfree with
new/delete.
gdb/ChangeLog:
* solib-dsbt.c (struct lm_info_dsbt): Add destructor, initialize
map field.
(dsbt_current_sos): Allocate lm_info_dsbt with new.
(dsbt_relocate_main_executable): Free lm_info_dsbt with delete
and allocate with new.
(dsbt_clear_solib, dsbt_free_so): Free lm_info_dsbt with delete.
This patch makes lm_info_aix a "real" class. It uses std::string,
initializes fields in-class and replaces XCNEW/xfree with new/delete.
The solib_aix_new_lm_info can be replaced by using the default copy
constructor.
gdb/ChangeLog:
* solib-aix.c (struct lm_info_aix): Initialize fields in-class.
<filename, member_name>: Change type to std::string.
(solib_aix_new_lm_info, solib_aix_xfree_lm_info): Remove.
(library_list_start_library): Allocate lm_info_aix with new.
(solib_aix_free_library_list, solib_aix_free_so): Free with delete.
(solib_aix_current_sos): Adapt to std::string, copy lm_info_aix
with copy constructor.
The lm_info structure is used to store target specific information about
mapped libraries. It is currently defined as an opaque type in solist.h
and a pointer to it is included in solist, the target-agnostic object
representing a loaded shared library. Multiple targets define their own
implementation of lm_info.
In anticipation of using C++ stuff (e.g. vector) in the lm_info objects,
we first need to avoid different definitions of classes with the same
name (which violates the one definition rule). This patch does it by
having a base class (lm_info_base) from which all the specific lm_info
derive. Each implementation is renamed to something that makes sense
(e.g. lm_info_aix for AIX). The next logical step would probably be to
derive directly from so_list, it's not really obvious, so I'll keep that
for another day.
One special case is the Neutrino (nto) support. It uses SVR4-style
libraries, but overrides some methods. To do that, it needed to have
its own copy of SVR4's lm_info structure in nto-tdep.c, because it was
just not possible to put it in solib-svr4.h and include that file. Over
time, that copy got out of sync, which is still the case today. I can
only assume that the lm_addr function in nto-tdep.c is broken right now.
The first field of the old lm_info was a pointer (gdb_byte *), whereas
in the new lm_info it's an address in the inferior (CORE_ADDR). Trying
to use that field today probably results in a crash. With this
refactor, it's now possible to put lm_info_svr4 in solib-svr4.h and just
include it. I have adapted the code in nto-tdep.c to that it builds,
but it's probably not correct. Since I don't have the knowledge nor
setup to try this on Neutrino, somebody else would have to fix it. But
I am confident that I am not making things worse than they already are.
gdb/ChangeLog:
* solist.h (struct lm_info): Remove.
(struct lm_info_base): New class.
(struct so_list) <lm_info>: Change type to lm_info_base *.
* nto-tdep.c (struct lm_info): Remove.
(lm_addr): Adjust.
* solib-aix.c (struct lm_info): Rename to ...
(struct lm_info_aix): ... this. Extend lm_info_base.
(lm_info_p): Rename to ...
(lm_info_aix_p): ... this, and adjust.
(solib_aix_new_lm_info, solib_aix_xfree_lm_info,
solib_aix_parse_libraries, library_list_start_library,
solib_aix_free_library_list, solib_aix_parse_libraries,
solib_aix_get_library_list,
solib_aix_relocate_section_addresses, solib_aix_free_so,
solib_aix_get_section_offsets,
solib_aix_solib_create_inferior_hook, solib_aix_current_sos):
Adjust.
(struct solib_aix_inferior_data) <library_list>: Adjust.
* solib-darwin.c (struct lm_info): Rename to ...
(struct lm_info_darwin): ... this. Extend lm_info_base.
(darwin_current_sos, darwin_relocate_section_addresses): Adjust.
* solib-dsbt.c (struct lm_info): Rename to ...
(struct lm_info_dsbt): ... this. Extend lm_info_base.
(struct dsbt_info) <main_executable_lm_info): Adjust.
(dsbt_current_sos, dsbt_relocate_main_executable, dsbt_free_so,
dsbt_relocate_section_addresses): Adjust.
* solib-frv.c (struct lm_info): Rename to ...
(struct lm_info_frv): ... this. Extend lm_info_base.
(main_executable_lm_info): Adjust.
(frv_current_sos, frv_relocate_main_executable, frv_free_so,
frv_relocate_section_addresses, frv_fdpic_find_global_pointer,
find_canonical_descriptor_in_load_object,
frv_fdpic_find_canonical_descriptor): Adjust.
* solib-svr4.c (struct lm_info): Move to solib-svr4.h, renamed
to lm_info_svr4.
(lm_info_read, lm_addr_check, svr4_keep_data_in_core,
svr4_clear_so, svr4_copy_library_list,
library_list_start_library, svr4_default_sos, svr4_read_so_list,
svr4_current_sos, svr4_fetch_objfile_link_map,
solist_update_incremental): Adjust.
* solib-svr4.h (struct lm_info_svr4): Move here from
solib-svr4.c.
* solib-target.c (struct lm_info): Rename to ...
(struct lm_info_target): ... this. Extend lm_info_base.
(lm_info_p): Rename to ...
(lm_info_target_p): ... this.
(solib_target_parse_libraries, library_list_start_segment,
library_list_start_section, library_list_start_library,
library_list_end_library, solib_target_free_library_list,
solib_target_current_sos, solib_target_free_so,
solib_target_relocate_section_addresses): Adjust.
* windows-nat.c (struct lm_info): Rename to ...
(struct lm_info_windows): ... this. Extend lm_info_base.
(windows_make_so, handle_load_dll, handle_unload_dll,
windows_xfer_shared_libraries): Adjust.
Darwin's lm_info structure is used a little bit differently than the
other solib implementations. The other implementations first allocate
an so_list object, then instanciate their specific lm_info structure,
and assign it to so_list::lm_info.
The Darwin implementation allocates both at the same time
(darwin_so_list). This patch changes it to be like the others, so that
we'll be able to do some generalizations later.
gdb/ChangeLog:
* solib-darwin.c (struct darwin_so_list): Remove.
(darwin_current_sos): Allocate an so_list object instead of a
darwin_so_list, separately allocate an lm_info object.
(darwin_free_so): Free lm_info.
One line was using printf_filtered instead of fprintf_filtered
to the requested file.
gdb/ChangeLog:
* mips-tdep.c (print_gp_register_row): Replace printf_filtered
with fprintf_filtered.
Since the GOT procedure linkage table is supported only if plt_got
isn't NULL, we need to check plt_got before using it.
* elf32-i386.c (elf_i386_allocate_dynrelocs): Check plt_got
before using .plt.got.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.
This patch adds ctor and dtor to regcache.
gdb:
2017-04-28 Yao Qi <yao.qi@linaro.org>
* regcache.c (regcache::regcache): New function.
(regcache::~regcache): New function.
(regcache_xmalloc_1): Remove.
(regcache_xmalloc): Call new regcache.
(regcache_xfree): Call delete regcache.
(get_thread_arch_aspace_regcache): Call new regcache.
PR binutils/21438
* dwarf.c (process_extended_line_op): Do not assume that the
string extracted from the section is NUL terminated.
(fetch_indirect_string): If the string retrieved from the section
is not NUL terminated, return an error message.
(fetch_indirect_line_string): Likewise.
(fetch_indexed_string): Likewise.
RAJESH reported that GDB gets "Couldn't write debug register: No such
process." on mips64 when GDB attaches to a multi threaded application.
Looks GDB nows PTRACE_GET_WATCH_REGS for inferior_ptid but
PTRACE_SET_WATCH_REGS for lwp->ptid, they may be different.
gdb:
2017-04-28 Yao Qi <yao.qi@linaro.org>
* mips-linux-nat.c (mips_linux_new_thread): Get lwpid from
lwp_info instead of getting from inferior_ptid.
The following patch fixes several outstanding overload resolution problems
with rvalue references and cv qualifiers in the test suite. The tests for
these problems typically passed with one compiler version and failed with
another. This behavior occurs because of the ordering of the overloaded
functions in the debug info. So the first best match "won out" over the
a subsequent better match.
One of the bugs addressed by this patch is the failure of rank_one_type to
account for type equality of two overloads based on CV qualifiers. This was
leading directly to problems evaluating rvalue reference overload quality,
but it is also highlighted in gdb.cp/oranking.exp, where two test KFAIL as
a result of this shortcoming.
I found the overload resolution code committed with the rvalue reference
patch (f9aeb8d49) needlessly over-complicated, and I have greatly simplified
it. This fixes some KFAILing tests in gdb.exp/rvalue-ref-overload.exp.
gdb/ChangeLog
* gdbtypes.c (LVALUE_REFERENCE_TO_RVALUE_BINDING_BADNESS)
DIFFERENT_REFERENCE_TYPE_BADNESS): Remove.
(CV_CONVERSION_BADNESS): Define.
(rank_one_type): Remove overly restrictive rvalue reference
rank checks.
Add cv-qualifier checks and subranks for type equality.
* gdbtypes.h (REFERENCE_CONVERSION_RVALUE,
REFERENCE_CONVERSION_CONST_LVALUE, CV_CONVERSION_BADNESS,
CV_CONVERSION_CONST, CV_CONVERSION_VOLATILE): Declare.
gdb/testsuite/ChangeLog
* gdb.cp/oranking.cc (test15): New function.
(main): Call test15 and declare additional variables for testing.
* gdb.cp/oranking.exp: Remove kfail status for "p foo4(&a)" and
"p foo101('abc')" tests.
* gdb.cp/rvalue-ref-overloads.exp: Remove kfail status for
"lvalue reference overload" test.
* gdb.cp/rvalue-ref-params.exp: Remove kfail status for
"print value of f1 on Child&& in f2" test.
Use
if (htab->elf.splt->size == 0)
htab->elf.splt->size = GET_PLT_ENTRY_SIZE (output_bfd);
instead of
if (htab->elf.splt->size == 0)
htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
* elf64-x86-64.c (elf_x86_64_size_dynamic_sections): Use "="
instead of "+=" to update 0.
The test py-inferior.exp fails when using a debug build of Python 3.6. I don't
see it failing with my system's default Python, but it might be related to the
different memory allocation scheme used when doing a build with pydebug.
The issue is that we are missing a Py_INCREF in
inferior_to_inferior_object. The PyObject_New function initializes the
object with a refcount of 1. If we assume that this refcount
corresponds to the reference we are returning, then we are missing an
incref for the reference in the inferior data.
The counterpart for the incref that corresponds to the reference in the
inferior data is in py_free_inferior, in the form the gdbpy_ref instance.
Here's how I can get it to crash (with some debug output):
$ ./gdb -nx -ex "set debug python 1"
(gdb) add-inferior
Added inferior 2
(gdb) python infs = gdb.inferiors()
Creating Python Inferior object inf = 1
Creating Python Inferior object inf = 2
(gdb) remove-inferiors 2
py_free_inferior inf = 2
infpy_dealloc inf = <unknown>
(gdb) python infs = None
Fatal Python error: Objects/tupleobject.c:243 object at 0x7f9cf1a568d8 has negative ref count -1
Current thread 0x00007f9cf1b68780 (most recent call first):
File "<string>", line 1 in <module>
[1] 408 abort (core dumped) ./gdb -nx -ex "set debug python 1"
After having created the inferiors object, their refcount is 1 (which
comes from PyObject_New), but it should be two. The gdb inferior object
has a reference and the "infs" list has a reference.
When invoking remove-inferiors, py_free_inferior gets called. It does
the decref that corresponds to the reference that the gdb inferior
object kept. At this moment, the refcount drops to 0 and the object
gets deallocated, even though the "infs" list still has a reference.
When we set "infs" to None, Python tries to decref the already zero
refcount and the assert triggers.
With this patch, it looks better:
(gdb) add-inferior
Added inferior 2
(gdb) python infs = gdb.inferiors()
Creating Python Inferior object inf = 1
Creating Python Inferior object inf = 2
(gdb) remove-inferiors 2
py_free_inferior inf = 2
(gdb) python infs = None
infpy_dealloc inf = <unknown>
gdb/ChangeLog:
* python/py-inferior.c (inferior_to_inferior_object): Increment reference
count when creating the object.
This patch creates dynamic sections in i386/x86-64 create_dynamic_sections
instead of creating them on demend. Linker will strip them if they are
empty. It changes order in x86-64 .eh_frame section. The extra DW_CFA_nop
paddings is due to
https://sourceware.org/bugzilla/show_bug.cgi?id=21441
bfd/
* elf32-i386.c (elf_i386_create_dynamic_sections): Create the
.plt.got section here.
(elf_i386_check_relocs): Don't create the .plt.got section.
* elf64-x86-64.c (elf_x86_64_create_dynamic_sections): Create
the .plt.got and .plt.bnd sections here.
(elf_x86_64_check_relocs): Don't create the .plt.got nor
.plt.bnd sections.
ld/
* testsuite/ld-x86-64/pr21038a.d: Update DW_CFA_nop paddings
in .eh_frame section.
* testsuite/ld-x86-64/pr21038c.d: Update .eh_frame order.
has_bnd_reloc was added to elf_x86_64_link_hash_entry track BND
relocations by
commit 0ff2b86e7c
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Wed Nov 20 09:01:04 2013 -0800
Create the second PLT for BND relocations
Since BND relocations have been deprecated by
commit d258b82828
Author: Igor Zamyatin <igor.zamyatin@intel.com>
Date: Tue Nov 18 10:52:36 2014 +0300
Add -z bndplt to generate BND prefix in PLT entries
This patch removes has_bnd_reloc from elf_x86_64_link_hash_entry and
checks bndplt instead of has_bnd_reloc.
* elf64-x86-64.c (elf_x86_64_link_hash_entry): Remove
has_bnd_reloc.
(elf_x86_64_link_hash_newfunc): Don't clear has_bnd_reloc.
(elf_x86_64_copy_indirect_symbol): Don't copy has_bnd_reloc.
(elf_x86_64_check_relocs): Don't set has_bnd_reloc.
(elf_x86_64_finish_dynamic_symbol): Check bndplt instead of
has_bnd_reloc.
Remove has_bnd_reloc
Change setup_gnu_properties to return the first relocatable ELF input
with GNU properties so that a backend can make decision based on GNU
properties.
* elf-bfd.h (elf_backend_data): Change setup_gnu_properties
to return bfd *.
(_bfd_elf_link_setup_gnu_properties): Return bfd *.
* elf-properties.c (_bfd_elf_link_setup_gnu_properties): Return
the first relocatable ELF input with GNU properties.
