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gas/
* testsuite/gas/riscv/priv-reg.d, testsuite/gas/riscv/priv-reg.s: New.
include/
* opcode/riscv-opc.h (DECLARE_CSR): Add missing privileged registers.
Sort to match privileged spec documentation order.
(DECLARE_CSR_ALIAS): Add ubadaddr, and comments.
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These two enumerators are unused, remove them.
gdb/ChangeLog:
* target.h (enum target_object) <TARGET_OBJECT_HPUX_UREGS,
TARGET_OBJECT_HPUX_SOLIB_GOT>: Remove.
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tdesc_register_in_reggroup_p in now able to handle arbitrary
groups. This is useful when groups are created while the
target descriptor file is received from the remote.
This can be the case of a soft core target processor where
registers/groups can change.
gdb/ChangeLog:
yyyy-mm-dd Franck Jullien <franck.jullien@gmail.com>
Stafford Horne <shorne@gmail.com>
* target-descriptions.c (tdesc_register_in_reggroup_p): Support
arbitrary strings.
(tdesc_use_registers): Add logic to register new reggroups.
(tdesc_reg::group): Update comment to indicate we allow
arbitrary strings.
* NEWS (Changes since GDB 8.0): Announce that GDB supports
arbitrary reggroups.
gdb/testsuite/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* gdb.xml/extra-regs.xml: Add example foo reggroup.
* gdb.xml/tdesc-regs.exp: Add test to check for foo reggroup.
gdb/doc/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* gdb.texinfo (Target Description Format): Explain that arbitrary
strings are now allowed for register groups.
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Traditionally reggroups have been created via reggroup_new() during
initialization code and never freed. Now, if we want to initialize
reggroups dynamically (i.e. in target description) we should be able to
free them. Create this function reggroup_gdbarch_new() which will
allocate the reggroup memory onto the passed gdbarch obstack.
Also creating reggroup_find() as a utility to find a gdbarch registered
reggroup object by name.
gdb/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* reggroups.c (reggroup_gdbarch_new): New function.
(reggroup_find): New function.
* reggroups.h (reggroup_gdbarch_new): New function.
(reggroup_find): New function.
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Currently the reggroups gdbarch_data cannot be manipulated until after
the gdbarch is completely initialized. This is usually done when the
object init depends on architecture specific fields. In the case of
reggroups it only depends on the obstack being available.
Coverting this to pre_init allows using reggroups during gdbarch
initialization. This is needed to allow registering arbitrary reggroups
during gdbarch initializations.
gdb/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* reggroups.c (reggroups_init): Change to depend only on
obstack rather than gdbarch.
(reggroup_add): Remove logic for forcing premature init.
(_initialize_reggroup): Set `reggroups_data` with
gdbarch_data_register_pre_init() rather than
gdbarch_data_register_post_init().
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Until now this feature has existed but was not documented. Adding docs
and tests.
gdb/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* infcmd.c (_initialize_infcmd): Add help for info reg $reggroup
and info all-registers $reggroup feature.
gdb/doc/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* gdb.texinfo (Registers): Document info reg $reggroup feature.
gdb/testsuite/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* gdb.base/reggroups.c: New file.
* gdb.base/reggroups.exp: New file.
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Get rid of:
/home/simark/src/binutils-gdb/gdb/target-descriptions.c:2026:25: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
vprintf_unfiltered (fmt, args);
when building with clang.
gdb/ChangeLog:
* target-descriptions.c (print_c_tdesc)
<printf_field_type_assignment>: Add ATTRIBUTE_PRINTF.
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While fiddling a bit with -Wunused-variable, Sergio noticed that "maint
print c-tdesc" was always generating code for the "tdesc_type
*field_type" variable, even when it wasn't used. This is caught by GCC
when using -Wunused-variable, of course.
This patch changes the print_c_tdesc class to only output the field
declaration when we actually need it.
It shouldn't be necessary to do the same with the other variable
declarations (type_with_fields and element_type), because they are
always if they are declared.
The C files in features/ are regenerated, some declarations of
field_type are removed, as expected, while some others move to where
they are used for the first time.
gdb/ChangeLog:
* target-descriptions.c (print_c_tdesc) <visit>: Don't output
field_type declaration, use printf_field_type_assignment
instead.
<printf_field_type_assignment>: New method.
* features/aarch64-core.c, features/aarch64-fpu.c
features/arc-arcompact.c, features/arc-v2.c,
features/arm/arm-with-iwmmxt.c, features/i386/32bit-core.c,
features/i386/32bit-mpx.c, features/i386/32bit-sse.c,
features/i386/64bit-avx512.c, features/i386/64bit-core.c,
features/i386/64bit-mpx.c, features/i386/64bit-sse.c,
features/i386/x32-core.c, features/or1k.c,
features/rs6000/powerpc-7400.c,
features/rs6000/powerpc-altivec32.c,
features/rs6000/powerpc-altivec32l.c,
features/rs6000/powerpc-altivec64.c,
features/rs6000/powerpc-altivec64l.c,
features/rs6000/powerpc-cell32l.c,
features/rs6000/powerpc-cell64l.c,
features/rs6000/powerpc-isa205-altivec32l.c,
features/rs6000/powerpc-isa205-altivec64l.c,
features/rs6000/powerpc-isa205-vsx32l.c,
features/rs6000/powerpc-isa205-vsx64l.c,
features/rs6000/powerpc-vsx32.c,
features/rs6000/powerpc-vsx32l.c,
features/rs6000/powerpc-vsx64.c,
features/rs6000/powerpc-vsx64l.c, features/s390-gs-linux64.c,
features/s390-tevx-linux64.c, features/s390-vx-linux64.c,
features/s390x-gs-linux64.c, features/s390x-tevx-linux64.c,
features/s390x-vx-linux64.c: Re-generate.
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The result of this memory read is never used, so it can be removed.
gdb/ChangeLog:
* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Remove
write-only assignment to "insn" variable.
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gas/
* config/tc-riscv.c (risc_ip) <o>: Add comment.
* testsuite/gas/riscv/c-nonzero-imm.d,
* testsuite/gas/riscv/c-nonzero-imm.l,
* testsuite/gas/riscv/c-nonzero-imm.s,
* testsuite/gas/riscv/c-nonzero-reg.d,
* testsuite/gas/riscv/c-nonzero-reg.l,
* testsuite/gas/riscv/c-nonzero-reg.s,
* testsuite/gas/riscv/c-zero-imm-64.d,
* testsuite/gas/riscv/c-zero-imm-64.s,
* testsuite/gas/riscv/c-zero-imm.d, testsuite/gas/riscv/c-zero-imm.s,
* testsuite/gas/riscv/c-zero-reg.d,
* testsuite/gas/riscv/c-zero-reg.s: New.
opcodes/
* riscv-opc.c (match_c_add_with_hint, match_c_lui_with_hint): New.
(riscv_opcodes) <li>: Delete "d,0" line. Change Cj to Co.
<andi, and, add, addiw, addw, c.addi>: Change Cj to Co.
<add>: Add explanatory comment for 4-operand add instruction.
<c.nop>: Add support for immediate operand.
<c.mv, c.add>: Use match_c_add_with_hint instead of match_c_add.
<c.lui>: Use match_c_lui_with_hint instead of match_c_lui.
<c.li, c.slli>: Use match_opcode instead of match_rd_nonzero.
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On Cell/B.E. multi-architecture debugging we use a "merged" address space
that encodes both the main PowerPC address space and the local store address
spaces of all active SPUs. This will always occupy 64 bits.
However, gdbarch_addr_bit is set to 32 on SPU, and may be set to 32 as well
on PowerPC. Since the new gdbarch_significant_addr_bit defaults to the
value of gdbarch_addr_bit, this means addresses may be improperly truncated.
Work around this problem by explicitly setting gdbarch_significant_addr_bit
to 64 both for the SPU target and also for PowerPC target that support
Cell/B.E. execution.
gdb/ChangeLog:
2017-12-20 Ulrich Weigand <uweigand@de.ibm.com>
* spu-tdep.c (spu_gdbarch_init): Set set_gdbarch_significant_addr_bit
to 64 bits.
(ppc_linux_init_abi): Likewise, if Cell/B.E. is supported.
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Doing some unrelated grepping found that there were some missing
spaces, fix it.
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Dot products deviate from the normal disassembly rules for lane indexed
instruction. Their canonical representation is in the form of:
v0.2s, v0.8b, v0.4b[0] instead of v0.2s, v0.8b, v0.b[0] to try to denote
that these instructions select 4x 1 byte elements instead of a single 1 byte
element.
Previously we were disassembling them following the normal rules, this patch
corrects the disassembly.
gas/
PR gas/22559
* config/tc-aarch64.c (vectype_to_qualifier): Support AARCH64_OPND_QLF_S_4B.
* gas/testsuite/gas/aarch64/dotproduct.d: Update disassembly.
include/
PR gas/22559
* aarch64.h (aarch64_opnd_qualifier): Add AARCH64_OPND_QLF_S_4B.
opcodes/
PR gas/22559
* aarch64-asm.c (aarch64_ins_reglane): Change AARCH64_OPND_QLF_S_B to
AARCH64_OPND_QLF_S_4B
* aarch64-dis.c (aarch64_ext_reglane): Change AARCH64_OPND_QLF_S_B to
AARCH64_OPND_QLF_S_4B
* aarch64-opc.c (aarch64_opnd_qualifiers): Add 4b variant.
* aarch64-tbl.h (QL_V2DOT): Change S_B to S_4B.
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Previously parse_vector_type_for_operand was changed to allow the use of 4b
register size for indexed lane instructions. However this had the unintended
side effect of also allowing 4b for normal vector registers.
Because this support was only partial the rest of the tool silently treated
4b as 8b and continued. This patch adds full support for 4b so it can be
properly distinguished from 8b and the correct errors are generated.
With this patch you still can't encode any instruction which actually requires
v<num>.4b but such instructions don't exist so to prevent needing a workaround
in get_vreg_qualifier_from_value this was just omitted.
gas/
PR gas/22529
* config/tc-aarch64.c (vectype_to_qualifier): Support AARCH64_OPND_QLF_V_4B.
* gas/testsuite/gas/aarch64/pr22529.s: New.
* gas/testsuite/gas/aarch64/pr22529.d: New.
* gas/testsuite/gas/aarch64/pr22529.l: New.
include/
PR gas/22529
* opcode/aarch64.h (aarch64_opnd_qualifier): Add AARCH64_OPND_QLF_V_4B.
opcodes/
PR gas/22529
* aarch64-opc.c (aarch64_opnd_qualifiers): Add 4b variant.
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field of 0 in dynamic executables.
PR 22587
* readelf.c (process_section_headers): Do not complain about an
sh_info field of 0 in relocation sections of ET_EXEC or ET_DYN
type executables.
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_bfd_elf_link_renumber_dynsyms is called twice by the linker. The
first call in bfd_elf_size_dynamic_sections is just to answer the
question as to whether there are there any dynamic symbols. The
second call in bfd_elf_size_dynsym_hash_dynstr sets the st_shndx value
that dynamic symbols will have. strip_excluded_output_sections is
called between these two calls. So sections seen on the first
_bfd_elf_link_renumber_dynsyms pass might differ from those seen on
the second pass. Unfortunately, that can result in a stripped
section's dynamic symbol being assigned a dynindx on the first pass
but not corrected to the final value (of zero, ie. not dynamic) on the
second pass. PowerPC, x86, mips, and most other targets that emit
dynamic section symbols, just test that section symbol dynindx is
non-zero before using a given section symbol in dynamic relocations.
This patch prevents _bfd_elf_link_renumber_dynsyms from setting any
section symbol dynindx on the first pass.
PR 22626
* elflink.c (_bfd_elf_link_renumber_dynsyms): Don't set section
dynindx when section_sym_count is NULL.
(bfd_elf_size_dynamic_sections): Pass NULL section_sym_count to
preliminary _bfd_elf_link_renumber_dynsyms call.
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This is a followup to "binutils nm testsuite tidy". Since the perror
in binutils_assemble has been removed, we need to take more care in
failure paths.
The patch also fixed a number of .exp files that have multiple tests,
where an assembly failure returns from the .exp file. In most cases
it is nicer to attempt all tests.
* testsuite/binutils-all/ar.exp (unique_symbol): Don't run AR
if assembly fails.
* testsuite/binutils-all/arc/objdump.exp (check_assembly): If
objfile is empty, fail test.
* testsuite/binutils-all/arm/objdump.exp: Don't return if assembly
fails for a test, continue on to other tests.
* testsuite/binutils-all/bfin/objdump.exp: Likewise.
* testsuite/binutils-all/hppa/objdump.exp: Likewise.
* testsuite/binutils-all/m68k/objdump.exp: Likewise.
* testsuite/binutils-all/vax/objdump.exp: Likewise.
* testsuite/binutils-all/size.exp: Likewise.
* testsuite/binutils-all/nm.exp: Likewise. Move PR12753 test.
* testsuite/binutils-all/objcopy.exp: Don't perror on assembly fail.
* testsuite/binutils-all/objdump.exp: Report assembly fails.
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PR 22532
* dwarf.c (read_and_display_attr_value): Add attributes that might
use the DW_FORM_exprloc form, and if so, display the decoded
location expression list.
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onto the stack.
PR 22493
* config/tc-arm.c (encode_ldmstm): Do not use A2 encoding of the
PUSH insn when pushing the stack pointer.
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Just like for instructions in GPRs, there's no need to have separate
templates for otherwise identical insns acting on XMM or YMM registers
(or memory of the same size).
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... qualified by their respective sizes, allowing to drop FirstXmm0 at
the same time.
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Express them as Reg|Tbyte and Acc|Tbyte respectively.
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Use a combination of a single new Reg bit and Byte, Word, Dword, or
Qword instead.
Besides shrinking the number of operand type bits this has the benefit
of making register handling more similar to accumulator handling (a
generic flag is being accompanied by a "size qualifier"). It requires,
however, to split a few insn templates, as it is no longer correct to
have combinations like Reg32|Reg64|Byte. This slight growth in size will
hopefully be outweighed by this change paving the road for folding a
presumably much larger number of templates later on.
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Consider the following Ada code defining a global variable whose
type is an array of static bounds (1 .. 2), but where its elements
are a variant record whose size is not statically known:
type Ints is array (Natural range <>) of Integer;
type Bounded_Ints (Max_Size : Natural) is record
Length : Natural := 0;
Objs : Ints (1 .. Max_Size);
end record;
type Ints_Doubled is array (1 .. 2) of Bounded_Ints (Idem (0));
Global : Ints_Doubled;
When compiling this program at -O2 using a GCC-6.4-based compiler
on x86_64-linux, trying to print the value of that global variable
yields:
(gdb) p global
$1 =
Let's look at the debugging info, which starts with the global
variable itself...
.uleb128 0x19 # (DIE (0x25e) DW_TAG_variable)
.long .LASF32 # DW_AT_name: "fd__global"
.long 0x273 # DW_AT_type
... its type is a reference to a typedef ...
.uleb128 0x14 # (DIE (0x273) DW_TAG_reference_type)
.byte 0x8 # DW_AT_byte_size
.long 0x202 # DW_AT_type
[...]
.uleb128 0x15 # (DIE (0x202) DW_TAG_typedef)
.long .LASF19 # DW_AT_name: "fd__ints_doubled"
.long 0x20d # DW_AT_type
... of an array (1..2) ...
.uleb128 0x2 # (DIE (0x20d) DW_TAG_array_type)
.long .LASF19 # DW_AT_name: "fd__ints_doubled"
.long 0x15b # DW_AT_type
.long 0x221 # DW_AT_sibling
.uleb128 0x16 # (DIE (0x21a) DW_TAG_subrange_type)
.long 0x40 # DW_AT_type
.sleb128 2 # DW_AT_upper_bound
.byte 0 # end of children of DIE 0x20d
... of a struct whose name is fd__Tints_doubledC:
.uleb128 0x10 # (DIE (0x15b) DW_TAG_structure_type)
.long .LASF11 # DW_AT_name: "fd__Tints_doubledC"
.long 0x1e4 # DW_AT_GNAT_descriptive_type
# DW_AT_artificial
.long 0x1e4 # DW_AT_sibling
.uleb128 0x7 # (DIE (0x16a) DW_TAG_member)
.long .LASF4 # DW_AT_name: "max_size"
[snip]
The error occurs while Ada evaluator is trying to "fix"
the element type inside the array, so as to determine its actual
size. For that, it searches for a parallel "XVZ" variable,
which, when found, contains the object's actual size.
Unfortunately in our case, the variable exists but has been
optimized out, as seen by the presence of a variable DIE in
the debugging info, but with no address attribute:
.uleb128 0x18 # (DIE (0x24e) DW_TAG_variable)
.long .LASF31 # DW_AT_name: "fd__Tints_doubledC___XVZ"
.long 0x257 # DW_AT_type
# DW_AT_artificial
Discussing this with some members of AdaCore's compiler team,
it is expected that the optimizer can get rid of this variable,
and we don't want to pessimize the code just to improve debuggability,
since -O2 is about performance. So, the idea of this patch is
not to make it work, but provide a bit more information to help
users understand what kind of error is preventing GDB from being
able to print the variable's value.
The first hurdle we had to clear was the fact that ada_val_print
traps all exceptions (including QUIT ones!), and does so completly
silently. So, the fix was to add a trace of the exception being
generated. While doing so, we fix an old XXX/FIXME by only catching
errors, letting QUIT exceptions go through.
Once this is done, we now get an error message, which gives a first
clue as to what was happening:
(gdb) p fd.global
$1 = <error reading variable: value has been optimized out>
However, it would be more useful to know which value it was
that was optimized out. For that purpose, we enhanced
ada-lang.c::ada_to_fixed_type_1 so as to re-throw the error
with a message which indicates which variable we failed to read.
With those changes, the new output is now:
(gdb) p fd.global
$1 = <error reading variable: unable to read value of fd__Tints_doubledC___XVZ (value has been optimized out)>
gdb/ChangeLog:
* ada-lang.c (ada_to_fixed_type_1): Rethrow errors with
a more detailed exception message when getting an exception
while trying to read the value of an XVZ variable.
* ada-valprint.c (ada_val_print): Only catch RETURN_MASK_ERROR
exceptions. Print an error message when an exception is caught.
gdb/testsuite/ChangeLog:
* gdb.dwarf2/ada-valprint-error.c: New file.
* gdb.dwarf2/ada-valprint-error.exp: New file.
Tested on x86_64-linux
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Consider the following code, which declares a variabled called "input"
of type "parameter", which is a record with one component called "u2",
where the type of that component is a simple 3-element array of
floating point values:
type Float_Array_3 is array (1 .. 3) of Float;
type parameters is record
u2 : Float_Array_3;
end record;
input : parameters;
Trying to assign a value to input.u2 causes GDB to crash:
(gdb) p input.u2 := (0.25,0.5,0.75)
[1] 20228 segmentation fault (core dumped) [...]/gdb
The crash occurs because input.u2 is described in the debugging
info as a typedef of an array. Indeed, input's type is:
<1><ae9>: Abbrev Number: 7 (DW_TAG_structure_type)
<aea> DW_AT_name : (indirect string, offset: 0x1045): target_wrapper__parameters
[...]
<2><af5>: Abbrev Number: 8 (DW_TAG_member)
<af6> DW_AT_name : u2
[...]
<afb> DW_AT_type : <0xaca>
and, looking at DIE 0xaca to get input.u2's type, we see:
<1><aca>: Abbrev Number: 4 (DW_TAG_typedef)
<acb> DW_AT_name : (indirect string, offset: 0x1060): target_wrapper__float_array_3
[...]
<ad1> DW_AT_type : <0xad5>
We can also confirm, following the DW_AT_type attribute (0xad5), that
it's a typedef of our array:
<1><ad5>: Abbrev Number: 5 (DW_TAG_array_type)
<ad6> DW_AT_name : (indirect string, offset: 0x1060): target_wrapper__float_array_3
[...]
In fact, this scenario uncovered 2 areas where typedef handling
is missing, thus causing a crash. The first happens inside
assign_aggregate:
if (ada_is_direct_array_type (lhs_type))
{
lhs = ada_coerce_to_simple_array (lhs);
lhs_type = value_type (lhs);
low_index = TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type);
high_index = TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type);
}
Here, lhs_type is a TYPE_CODE_TYPEDEF. ada_is_direct_array_type
knows how to handle it, but TYPE_ARRAY_LOWER_BOUND_VALUE assumes
that the given type is a TYPE_CODE_ARRAY. As such, it ends up
accessing some fields in lhs_type which it shouldn't, and kaboom.
We fixed this issue by making sure that the TYPE_CODE_TYPEDEF
layer gets stripped.
Once this is done, we hit a different kind of error, also leading to
a SEGV, this time in assign_component. The code looks like this:
if (TYPE_CODE (value_type (lhs)) == TYPE_CODE_ARRAY)
[...]
else
[...]
Because once again lhs is a TYPE_CODE_TYPEDEF, the check fail,
and we end up assuming that lhs is a struct, executing the "else"
block, which is:
else
{
elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
elt = ada_to_fixed_value (elt);
}
Since lhs is not a struct, ada_index_struct_field returns NULL,
which ada_to_fixed_value does not handle well, hence another crash.
This patch fixes this other issue the same way, by stripping
TYPE_CODE_TYPEDEF layers.
gdb/ChangeLog:
* ada-lang.c (assign_component): Strip any TYPE_CODE_TYPEDEF
layer from lhs' type.
(assign_aggregate): Likewise.
gdb/testsuite:
* gdb.ada/assign_arr: New testcase.
Tested on x86_64-linux.
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Using this small example:
procedure Foo is
type Integer_Access is access all Integer;
procedure P (A : Integer_Access) is
begin
null;
end P;
begin
P (null);
end Foo;
and doing this debug session:
(gdb) b p
Breakpoint 1 at 0x402d67: file foo.adb, line 7.
(gdb) print p(null)
Breakpoint 1, foo.p (a=0x641010) at foo.adb:10
... ^^^^^^^^^^
shows that something goes wrong between the initial null value and the
received parameter value in the 'f' function.
The value for the parameter 'a' we get is the address of the value we
would expect instead of the value itself. This can be checked by doing:
(gdb) p *a
$1 = 0
Before this fix, in ada_convert_value, this function was looking to the
actual value (the null value here) to determine if the formal (parameter
'a' in the procedure 'P' in this exemple) requires a pointer or not which
is a wrong assumption and leads to push the address of the value to the
inferior instead of the value itself.
This is fixed by this patch.
gdb/ChangeLog:
* ada-lang.c (ada_convert_actual): Change the way actual value
are passed to the inferior when the inferior expects a pointer type.
gdb/testsuite/ChangeLog:
* gdb.ada/funcall_ptr: New testcase.
Tested on x86_64-linux.
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Pseudo prefixes must be used on an instruction. Issue an error when
pseudo prefix is used without instruction.
PR gas/22623
* gas/config/tc-i386.c (output_insn): Check pseudo prefix
without instruction.
* testsuite/gas/i386/i386.exp: Run inval-pseudo.
* testsuite/gas/i386/inval-pseudo.l: New file.
* testsuite/gas/i386/inval-pseudo.s: Likewise.
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As suggested by Joel Brobecker <brobecker@adacore.com> and as per fsf
coding standards. Also fix a few more issues with directly printing
pointers.
gdb/ChangeLog:
* gdb/or1k-tdep.c (show_or1k_debug): Fix function parameter alignment.
(or1k_analyse_inst): Likewise.
(or1k_single_step_through_delay): Likewise.
(or1k_frame_cache): Fix parameter alignment and use paddress()
instead of %x.
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gdb/ChangeLog:
yyyy-mm-dd Stafford Horne <shorne@gmail.com>
* NEWS (Changes since GDB 8.0): Mention new or1k target and new
commands to set/show or1k debug.
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I forgot to indent the "if" clause properly and put the "&&" at the
beginning of the line, so ARI complained. This commit fixed it.
gdb/ChangeLog:
2017-12-15 Sergio Durigan Junior <sergiodj@redhat.com>
* typeprint.c (whatis_exp): Fix ARI warning and reindent "if"
condition.
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This commit implements the pahole-like '/o' option for 'ptype', which
prints the offsets and sizes of struct fields, reporting whenever
there is a hole found.
The output is heavily based on pahole(1), with a few modifications
here and there to adjust it to our reality. Here's an example:
/* offset | size */ type = struct wer : public tuv {
public:
/* 32 | 24 */ struct tyu {
/* 32:31 | 4 */ int a1 : 1;
/* 32:28 | 4 */ int a2 : 3;
/* 32: 5 | 4 */ int a3 : 23;
/* 35: 3 | 1 */ char a4 : 2;
/* XXX 3-bit hole */
/* XXX 4-byte hole */
/* 40 | 8 */ int64_t a5;
/* 48:27 | 4 */ int a6 : 5;
/* 48:56 | 8 */ int64_t a7 : 3;
/* total size (bytes): 24 */
} a1;
/* total size (bytes): 56 */
}
A big part of this patch handles the formatting logic of 'ptype',
which is a bit messy. The code to handle bitfield offsets, however,
took some time to craft. My thanks to Pedro Alves for figuring things
out and pointing me to the right direction, as well as coming up with
a way to inspect the layout of structs with bitfields (see testcase
for comments).
After many discussions both on IRC and at the mailing list, I tried to
implement printing vtables and inherited classes. Unfortunately the
code grew too complex and there were still a few corner cases failing
so I had to drop the attempt. This should be implemented in a future
patch.
This patch is the start of a long-term work I'll do to flush the local
patches we carry for Fedora GDB. In this specific case, I'm aiming at
upstreaming the feature implemented by the 'pahole.py' script that is
shipped with Fedora GDB:
<https://src.fedoraproject.org/rpms/gdb/blob/master/f/gdb-archer.patch#_311>
This has been regression-tested on the BuildBot. There's a new
testcase for it, along with an update to the documentation. I also
thought it was worth mentioning this feature in the NEWS file.
gdb/ChangeLog:
2017-12-15 Sergio Durigan Junior <sergiodj@redhat.com>
Pedro Alves <palves@redhat.com>
PR cli/16224
* NEWS (Changes since GDB 8.0): Mention new '/o' flag.
* c-typeprint.c (OFFSET_SPC_LEN): New define.
(c_type_print_varspec_prefix): New argument 'struct
print_offset_data *'.
(c_type_print_base_1): New function and prototype.
(c_print_type_1): New function, with code from 'c_print_type'.
(c_print_type): Use 'c_print_type_1'.
(c_type_print_varspec_prefix): New argument 'struct
print_offset_data *'. Use it. Call 'c_type_print_base_1'
instead of 'c_print_type_base'.
(print_spaces_filtered_with_print_options): New function.
(output_access_specifier): Take new argument FLAGS. Modify
function to call 'print_spaces_filtered_with_print_options'.
(c_print_type_vtable_offset_marker): New function.
(c_print_type_union_field_offset): New function.
(c_print_type_struct_field_offset): New function.
(c_print_type_no_offsets): New function.
(c_type_print_base_struct_union): New argument 'struct
print_offset_data *'. Print offsets and sizes for
struct/union/class fields.
* typeprint.c (const struct type_print_options
type_print_raw_options): Initialize 'print_offsets'.
(static struct type_print_options default_ptype_flags):
Likewise.
(struct print_offset_data print_offset_default_data): New
variable.
(whatis_exp): Handle '/o' option.
(_initialize_typeprint): Add '/o' flag to ptype's help.
* typeprint.h (struct print_offset_data): New struct.
(struct type_print_options) <print_offsets>: New field.
gdb/testsuite/ChangeLog:
2017-12-15 Sergio Durigan Junior <sergiodj@redhat.com>
PR cli/16224
* gdb.base/ptype-offsets.cc: New file.
* gdb.base/ptype-offsets.exp: New file.
gdb/doc/ChangeLog:
2017-12-15 Sergio Durigan Junior <sergiodj@redhat.com>
PR cli/16224
* gdb.texinfo (ptype): Add documentation for new flag '/o'.
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While doing the 'ptype /o' work, I noticed that 'c_type_print_base'
was very long, with a big amount of code just to handle the case of
TYPE_CODE_{STRUCT,UNION}. This made working with the function a bit
difficult, specially because of the level of indentation.
This commit moves this part of the code to their own functions. Now
we have a 'c_type_print_base_struct_union' with most of the code, and
also 'need_access_label_p', which is a subset of the code that was
also a good candidate for having its own function.
gdb/ChangeLog:
2017-12-15 Sergio Durigan Junior <sergiodj@redhat.com>
* c-typeprint.c (need_access_label_p): New function.
(c_type_print_base_struct_union): New function.
(c_type_print_base): Move code to handle
TYPE_CODE_{STRUCT,UNION} to the functions mentioned above.
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PR 22571
* archive.c (bfd_openr_next_archived_file): Extend the
documentation to note that it is necessary to call
bfd_check_format on the rrturned bfd before using it.
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This fixes PR19061, where gdb hangs/spins-on-cpu when debugging any
program on Alpha.
(This patch is Uros' forward port of the patch from comment #5
of the PR [1].)
Patch was tested on alphaev68-linux-gnu, also tested with gcc's
testsuite, where it fixed all hangs in guality.exp and
simulate-thread.exp testcases.
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=19061#c5
gdb/ChangeLog:
2017-12-15 Richard Henderson <rth@redhat.com>
Uros Bizjak <ubizjak@gmail.com>
PR gdb/19061
* alpha-tdep.c (alpha_software_single_step): Call
alpha_deal_with_atomic_sequence here.
(set_gdbarch_software_single_step): Set to
alpha_software_single_step.
* nat/linux-ptrace.h [__alpha__]: Define GDB_ARCH_IS_TRAP_BRKPT
and GDB_ARCH_IS_TRAP_HWBKPT.
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I see the following test failure when gdb is configured without XML
support,
maintenance check xml-descriptions binutils-gdb/gdb/testsuite/../features
warning: Can not parse XML target description; XML support was disabled at compile time^M
Tested 29 XML files, 29 failed
(gdb) FAIL: gdb.gdb/unittest.exp: maintenance check xml-descriptions ${srcdir}/../features
gdb/testsuite:
2017-12-15 Yao Qi <yao.qi@linaro.org>
* gdb.gdb/unittest.exp: Skip 'maintenance check xml-descriptions'
if XML is disabled.
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