1347 Commits

Author SHA1 Message Date
Christian Biesinger
31edb80295 Change some arguments to gdb::string_view instead of name+len
Just some code cleanup. This change has a few benefits:
- Shorter argument list in the functions
- If the caller needs to calculate the string, they no longer
  need to explicitly call strlen
- It is easy to pass std::string to this (done in one place
  currently)

This also updates a couple of places that were passing 0/1 to
a bool parameter.

gdb/ChangeLog:

2019-10-29  Christian Biesinger  <cbiesinger@google.com>

	* coffread.c (record_minimal_symbol): Update.
	(process_coff_symbol): Update.
	* dbxread.c (read_dbx_symtab): Update.
	* dwarf2read.c (add_partial_symbol): Update.
	(fixup_go_packaging): Update.
	(load_partial_dies): Update.
	(new_symbol): Update.
	* elfread.c (record_minimal_symbol): Change signature to use
	gdb::string_view instead of name+len.
	(elf_symtab_read): Update.
	(elf_rel_plt_read): Update.
	* mdebugread.c (parse_partial_symbols): Update.
	(handle_psymbol_enumerators): Update.
	(new_symbol): Update.
	* minsyms.c (minimal_symbol_reader::record_full): Change signature
	to use gdb::string_view instead of name+len.
	* minsyms.h (class minimal_symbol_reader) <record_full>: Likewise.
	* psympriv.h (add_psymbol_to_list): Likewise.
	* psymtab.c (add_psymbol_to_bcache): Likewise.
	(add_psymbol_to_list): Likewise.
	* stabsread.c (define_symbol): Update.
	* symtab.c (symbol_set_names): Change signature to use gdb::string_view.
	* symtab.h (SYMBOL_SET_NAMES): Likewise.
	(symbol_set_names): Likewise.
	* xcoffread.c (scan_xcoff_symtab): Update.

Change-Id: I2675c6865e0368f9c755a1081088a53aa54dda4c
2019-10-29 14:19:59 -05:00
Ali Tamur
7ba99d2188 DWARF 5 support: Handle line table and file indexes
*  Fix handling of file and directory indexes in line tables; in DWARF 5 the
indexes are zero-based. Make file_names field private to abstract this detail
from the clients. Introduce file_names, is_valid_file_index and
file_names_size methods. Reflect these changes in clients.
*  Handle DW_FORM_data16 in read_formatted_entries; it is used to record MD5
of the file entries in DWARF 5.
*  Fix a bug in line header parsing that calculates the length of the header
incorrectly. (Seemingly this manifests itself only in DWARF 5).

Tested with CC=/usr/bin/gcc (version 8.3.0) against master branch (also with
-gsplit-dwarf and -gdwarf-4 flags) and there was no increase in the set of
tests that fails. (gdb still cannot debug a 'hello world' program with DWARF 5,
so for the time being, this is all we care about).

This is part of an effort to support DWARF 5 in gdb.

gdb/ChangeLog:

	* dwarf2read.c (dir_index): Change type.
	(file_name_index): Likewise.
	(line_header::include_dir_at): Change comment and implementation on
	whether it is DWARF 5.
	(line_header::is_valid_file_index): New function.
	(line_header::file_name_at): Change comment and implementation on
	whether it is DWARF 5.
	(line_header::file_names): Change to private field renamed as
	m_file_names and introduce a new accessor method.
	(line_header::file_names_size): New method.
	(line_header::include_dirs): Change to private field and rename as
	m_include_dirs.
	(dw2_get_file_names_reader): Define local var at a smaller scope and
	reflect API change.
	(dwarf2_cu::setup_type_unit_groups): Reflect API change.
	(process_structure_scope): Likewise.
	(line_header::add_include_dir): Change message and reflect renaming.
	(line_header::add_file_name): Likewise.
	(read_formatted_entries): Handle DW_FORM_data16.
	(dwarf_decode_line_header): Fix line header length calculation.
	(psymtab_include_file_name): Change comment and API.
	(lnp_state_machine::m_file): Update comment and reflect type change.
	(lnp_state_machine::record_line): Reflect type change.
	(dwarf_decode_lines): Reflect API change.
	(file_file_name): Likewise.
	(file_full_name): Likewise.
2019-10-21 14:22:12 -07:00
Tom de Vries
85102364b2 [gdb] Fix more typos in comments
Fix typos in comments.  NFC.

Tested on x86_64-linux.

gdb/ChangeLog:

2019-10-18  Tom de Vries  <tdevries@suse.de>

	* aarch64-tdep.c: Fix typos in comments.
	* ada-lang.c: Same.
	* ada-tasks.c: Same.
	* alpha-tdep.c: Same.
	* alpha-tdep.h: Same.
	* amd64-nat.c: Same.
	* amd64-windows-tdep.c: Same.
	* arc-tdep.c: Same.
	* arc-tdep.h: Same.
	* arch-utils.c: Same.
	* arm-nbsd-tdep.c: Same.
	* arm-tdep.c: Same.
	* ax-gdb.c: Same.
	* blockframe.c: Same.
	* btrace.c: Same.
	* c-varobj.c: Same.
	* coff-pe-read.c: Same.
	* coffread.c: Same.
	* cris-tdep.c: Same.
	* darwin-nat.c: Same.
	* dbxread.c: Same.
	* dcache.c: Same.
	* disasm.c: Same.
	* dtrace-probe.c: Same.
	* dwarf-index-write.c: Same.
	* dwarf2-frame-tailcall.c: Same.
	* dwarf2-frame.c: Same.
	* dwarf2read.c: Same.
	* eval.c: Same.
	* exceptions.c: Same.
	* fbsd-tdep.c: Same.
	* findvar.c: Same.
	* frame.c: Same.
	* frv-tdep.c: Same.
	* gnu-v3-abi.c: Same.
	* go32-nat.c: Same.
	* h8300-tdep.c: Same.
	* hppa-tdep.c: Same.
	* i386-linux-tdep.c: Same.
	* i386-tdep.c: Same.
	* ia64-libunwind-tdep.c: Same.
	* ia64-tdep.c: Same.
	* infcmd.c: Same.
	* infrun.c: Same.
	* linespec.c: Same.
	* linux-nat.c: Same.
	* linux-thread-db.c: Same.
	* machoread.c: Same.
	* mdebugread.c: Same.
	* mep-tdep.c: Same.
	* mn10300-tdep.c: Same.
	* namespace.c: Same.
	* objfiles.c: Same.
	* opencl-lang.c: Same.
	* or1k-tdep.c: Same.
	* osabi.c: Same.
	* ppc-linux-nat.c: Same.
	* ppc-linux-tdep.c: Same.
	* ppc-sysv-tdep.c: Same.
	* printcmd.c: Same.
	* procfs.c: Same.
	* record-btrace.c: Same.
	* record-full.c: Same.
	* remote-fileio.c: Same.
	* remote.c: Same.
	* rs6000-tdep.c: Same.
	* s12z-tdep.c: Same.
	* score-tdep.c: Same.
	* ser-base.c: Same.
	* ser-go32.c: Same.
	* skip.c: Same.
	* sol-thread.c: Same.
	* solib-svr4.c: Same.
	* solib.c: Same.
	* source.c: Same.
	* sparc-nat.c: Same.
	* sparc-sol2-tdep.c: Same.
	* sparc-tdep.c: Same.
	* sparc64-tdep.c: Same.
	* stabsread.c: Same.
	* stack.c: Same.
	* symfile.c: Same.
	* symtab.c: Same.
	* target-descriptions.c: Same.
	* target-float.c: Same.
	* thread.c: Same.
	* utils.c: Same.
	* valops.c: Same.
	* valprint.c: Same.
	* value.c: Same.
	* varobj.c: Same.
	* windows-nat.c: Same.
	* xcoffread.c: Same.
	* xstormy16-tdep.c: Same.
	* xtensa-tdep.c: Same.

Change-Id: I5175f1b107bfa4e1cdd4a3361ccb4739e53c75c4
2019-10-18 02:48:08 +02:00
Tom de Vries
405feb71d4 [gdb] Fix typos in comments
Fix typos in comments.  NFC.

Tested on x86_64-linux.

gdb/ChangeLog:

2019-10-17  Tom de Vries  <tdevries@suse.de>

	* arm-nbsd-nat.c: Fix typos in comments.
	* arm-tdep.c: Same.
	* darwin-nat-info.c: Same.
	* dwarf2read.c: Same.
	* elfread.c: Same.
	* event-top.c: Same.
	* findvar.c: Same.
	* gdbtypes.c: Same.
	* hppa-tdep.c: Same.
	* i386-tdep.c: Same.
	* jit.c: Same.
	* main.c: Same.
	* mdebugread.c: Same.
	* moxie-tdep.c: Same.
	* nto-procfs.c: Same.
	* osabi.c: Same.
	* ppc-linux-tdep.c: Same.
	* remote.c: Same.
	* riscv-tdep.c: Same.
	* s390-tdep.c: Same.
	* sh-tdep.c: Same.
	* sparc-linux-tdep.c: Same.
	* sparc-nat.c: Same.
	* stack.c: Same.
	* target-descriptions.c: Same.
	* top.c: Same.
	* varobj.c: Same.

Change-Id: I6047967abd2d51c9000dea15184d19f4e952c3ff
2019-10-17 18:06:36 +02:00
Keith Seitz
950b74950f DWARF reader: Reject sections with invalid sizes
This is another fuzzer bug, gdb/23567.  This time, the fuzzer has
specifically altered the size of .debug_str:

$ eu-readelf -S objdump
Section Headers:
[Nr] Name                 Type         Addr             Off      Size     ES Flags Lk Inf Al
[31] .debug_str           PROGBITS     0000000000000000 0057116d ffffffffffffffff  1 MS     0   0  1

When this file is loaded into GDB, the DWARF reader crashes attempting
to access the string table (or it may just store a bunch of nonsense):

[gdb-8.3-6-fc30]
$ gdb -nx -q objdump
BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...
Segmentation fault (core dumped)

Nick has already committed a BFD patch to issue the warning seen above.

[gdb master 6acc1a0b]
$ gdb -BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...
(gdb) inf func
All defined functions:

File ./../include/dwarf2.def:
186:	const

              8 *>(.:
                     ;'@�B);
747:	const

              8 *�(.:
                     ;'@�B);
701:	const

              8 *�D �
                     (.:
                        ;'@�B);
71:	const

              8 *(.:
                    ;'@�B);
/* and more gibberish  */

Consider read_indirect_string_at_offset_from:

static const char *
read_indirect_string_at_offset_from (struct objfile *objfile,
                                     bfd *abfd, LONGEST str_offset,
                                     struct dwarf2_section_info *sect,
                                     const char *form_name,
                                     const char *sect_name)
{
  dwarf2_read_section (objfile, sect);
  if (sect->buffer == NULL)
    error (_("%s used without %s section [in module %s]"),
           form_name, sect_name, bfd_get_filename (abfd));
  if (str_offset >= sect->size)
    error (_("%s pointing outside of %s section [in module %s]"),
           form_name, sect_name, bfd_get_filename (abfd));
  gdb_assert (HOST_CHAR_BIT == 8);
  if (sect->buffer[str_offset] == '\0')
    return NULL;
  return (const char *) (sect->buffer + str_offset);
}

With sect_size being ginormous, the code attempts to access
sect->buffer[GINORMOUS], and depending on the layout of memory,
GDB either stores a bunch of gibberish strings or crashes.

This is an attempt to mitigate this by implementing a similar approach
used by BFD. In our case, we simply reject the section with the invalid
length:

$ ./gdb -nx -q objdump
BFD: warning: /path/to/objdump has a corrupt section with a size (ffffffffffffffff) larger than the file size
Reading symbols from /path/to/objdump...

warning: Discarding section .debug_str which has a section size (ffffffffffffffff) larger than the file size [in module /path/to/objdump]
DW_FORM_strp used without .debug_str section [in module /path/to/objdump]
(No debugging symbols found in /path/to/objdump)
(gdb)

Unfortunately, I have not found a way to regression test this, since it
requires poking ELF section headers.

gdb/ChangeLog:
2019-10-16  Keith Seitz  <keiths@redhat.com>

	PR gdb/23567
	* dwarf2read.c (dwarf2_per_objfile::locate_sections): Discard
	sections whose size is greater than the file size.

Change-Id: I896ac3b4eb2207c54e8e05c16beab3051d9b4b2f
2019-10-16 11:35:16 -07:00
Andrew Burgess
0dc327459b gdb: Remove vec.{c,h} and update code to not include vec.h
Removes vec.c and vec.h from the source tree, and remove all the
remaining includes of vec.h.  There should be no user visible changes
after this commit.

I did have a few issues rebuilding GDB after applying this patch due
to cached dependencies, I found that running this command in the build
directory resolved my build issues without requiring a 'make clean':

    rm -fr gdb/gdbserver/gdbsupport/.deps/

gdb/ChangeLog:

	* Makefile.in: Remove references to vec.h and vec.c.
	* aarch64-tdep.c: No longer include vec.h.
	* ada-lang.c: Likewise.
	* ada-lang.h: Likewise.
	* arm-tdep.c: Likewise.
	* ax.h: Likewise.
	* breakpoint.h: Likewise.
	* charset.c: Likewise.
	* cp-support.h: Likewise.
	* dtrace-probe.c: Likewise.
	* dwarf2read.c: Likewise.
	* extension.h: Likewise.
	* gdb_bfd.c: Likewise.
	* gdbsupport/gdb_vecs.h: Likewise.
	* gdbsupport/vec.c: Remove.
	* gdbsupport/vec.h: Remove.
	* gdbthread.h: Likewise.
	* guile/scm-type.c: Likewise.
	* inline-frame.c: Likewise.
	* machoread.c: Likewise.
	* memattr.c: Likewise.
	* memrange.h: Likewise.
	* namespace.h: Likewise.
	* nat/linux-btrace.h: Likewise.
	* osdata.c: Likewise.
	* parser-defs.h: Likewise.
	* progspace.h: Likewise.
	* python/py-type.c: Likewise.
	* record-btrace.c: Likewise.
	* rust-exp.y: Likewise.
	* solib-target.c: Likewise.
	* stap-probe.c: Likewise.
	* target-descriptions.c: Likewise.
	* target-memory.c: Likewise.
	* target.h: Likewise.
	* varobj.c: Likewise.
	* varobj.h: Likewise.
	* xml-support.h: Likewise.

gdb/gdbserver/ChangeLog:

	* Makefile.in: Remove references to vec.c.

Change-Id: I0c91d7170bf1b5e992a387fcd9fe4f2abe343bb5
2019-10-15 21:31:55 +01:00
Andrew Burgess
ae6400219c gdb: Remove use of VEC from dwarf2read.c
This removes a use of VEC from GDB, from dwarf2read.c.  This removal
is not very clean, and would probably benefit from additional
refactoring in the future.

The problem here is that the VEC is contained within struct
dwarf2_per_cu_data, which is treated as POD in dwarf2read.c.  As such
it is actually a VEC pointer.  When converting this to a std::vector
in an ideal world we would not use a std::vector pointer, and use the
std::vector directly.  Sadly, to do that would require some rewriting
in dwarf2read.c - my concern would be introducing bugs during this
rewrite.

If we move to a std::vector pointer then we need to take care to
handle the case where the pointer is null.  The old VEC library would
handle null for us, making the VEC interface very clean.  With
std::vector we need to handle the null pointer case ourselves.

The achieve this then I've added a small number of function that wrap
up access to the std::vector, hopefully hiding the null pointer
management.

The final ugliness with this conversion is that, ideally, when
wrapping a data member behind an interface I would make the data
member private, however, treating the structure as POD once again
prevents this, so we are left with the data member being public, but
access (ideally) being through the published interface functions.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* gdb/dwarf2read.c (dwarf2_per_objfile::~dwarf2_per_objfile):
	Update for new std::vector based implementation.
	(process_psymtab_comp_unit_reader): Likewise.
	(scan_partial_symbols): Likewise.
	(recursively_compute_inclusions): Likewise.
	(compute_compunit_symtab_includes): Likewise.
	(process_imported_unit_die): Likewise.
	(queue_and_load_dwo_tu): Likewise.
	(follow_die_sig_1): Likewise.
	* gdb/dwarf2read.h: Remove DEF_VEC_P.
	(typedef dwarf2_per_cu_ptr): Remove.
	(struct dwarf2_per_cu_data) <imported_symtabs_empty>: New
	function.
	(struct dwarf2_per_cu_data) <imported_symtabs_push>: New function.
	(struct dwarf2_per_cu_data) <imported_symtabs_size>: New function.
	(struct dwarf2_per_cu_data) <imported_symtabs_free>: New function.
	(struct dwarf2_per_cu_data) <imported_symtabs>: Change to
	std::vector.

Change-Id: Id0f4bda977c9dd83b0ba3d7fb42f7e5e2b6869c8
2019-10-15 20:12:25 +01:00
Simon Marchi
6acc1a0b9d gdb: remove unused includes from dwarf2read.c
include-what-you-use says:

../../../src/binutils-gdb/gdb/dwarf2read.c should remove these lines:
- #include <ctype.h>  // lines 67-67
- #include <sys/stat.h>  // lines 59-59
- #include <sys/types.h>  // lines 83-83
- #include <cmath>  // lines 88-88
- #include <forward_list>  // lines 90-90
- #include <set>  // lines 89-89
- #include <unordered_set>  // lines 85-85
- #include "completer.h"  // lines 60-60
- #include "expression.h"  // lines 44-44
- #include "gdbsupport/byte-vector.h"  // lines 78-78
- #include "gdbsupport/filestuff.h"  // lines 71-71
- #include "gdbsupport/gdb_unlinker.h"  // lines 74-74

After a quick glance, that makes sense, so this patch removes them.

gdb/ChangeLog:

	* dwarf2read.c: Remove includes.

Change-Id: I13cfcb2f1d747144fddba7f66b329630b79dae90
2019-10-14 10:15:51 -04:00
Tom Tromey
77c2dba3e8 Avoid crash on single-field union in Rust
PR rust/24976 points out a crash in gdb when a single-field union is
used in Rust.

The immediate problem was a NULL pointer dereference in
quirk_rust_enum.  However, that code is also erroneously treating a
single-field union as if it were a univariant enum.  Looking at the
output of an older Rust compiler, it turns out that univariant enums
are distinguished by having a single *anonymous* field.  This patch
changes quirk_rust_enum to limit its fixup to this case.

Tested with a new-enough version of the Rust compiler to cause the
crash; plus by using an older executable that uses the old univariant
encoding.

gdb/ChangeLog
2019-10-03  Tom Tromey  <tom@tromey.com>

	PR rust/24976:
	* dwarf2read.c (quirk_rust_enum): Handle single-element unions.

gdb/testsuite/ChangeLog
2019-10-03  Tom Tromey  <tom@tromey.com>

	PR rust/24976:
	* gdb.rust/simple.rs (Union2): New type.
	(main): Use Union2.
	* gdb.rust/simple.exp: Add test.
2019-10-03 20:56:22 -06:00
Andrew Burgess
0a4b09130a gdb/fortran: Nested subroutine support
This patch is a rebase and update of the following three patches:

   https://sourceware.org/ml/gdb-patches/2018-11/msg00298.html
   https://sourceware.org/ml/gdb-patches/2018-11/msg00302.html
   https://sourceware.org/ml/gdb-patches/2018-11/msg00301.html

I have merged these together into a single commit as the second patch,
adding scope support to nested subroutines, means that some of the
changes in the first patch are now no longer useful and would have to
be backed out.  The third patch is tightly coupled to the changes in
the second of these patches and I think deserves to live together with
it.

There is an extra change in cp-namespace.c that is new, this resolves
an issue with symbol lookup when placing breakpoints from within
nested subroutines.

There is also an extra test added to this commit 'nested-funcs-2.exp'
that was written by Richard Bunt from ARM, this offers some additional
testing of breakpoints on nested functions.

After this commit it is possible to place breakpoints on nested
Fortran subroutines and functions by using a fully scoped name, for
example, given this simple Fortran program:

    program greeting
      call message
    contains
      subroutine message
        print *, "Hello World"
      end subroutine message
    end program greeting

It is possible to place a breakpoint in 'message' with:

    (gdb) break greeting::message
    Breakpoint 1 at 0x4006c9: file basic.f90, line 5.

What doesn't work with this commit is placing a breakpoint like this:

    (gdb) break message
    Function "message" not defined.

Making this work will come in a later commit.

gdb/ChangeLog:

	* cp-namespace.c (cp_search_static_and_baseclasses): Only search
	for nested static variables when searchin VAR_DOMAIN.
	* dwarf2read.c (add_partial_symbol): Add nested subroutines to the
	global scope, update comment.
	(add_partial_subprogram): Call add_partial_subprogram recursively
	for nested subroutines when processinng Fortran.
	(load_partial_dies): Process the child entities of a subprogram
	when processing Fortran.
	(partial_die_parent_scope): Handle building scope
	for Fortran nested functions.
	(process_die): Record that nested functions have a scope.
	(new_symbol): Always record Fortran subprograms on the global
	symbol list.
	(determine_prefix): How to build the prefix for Fortran
	subprograms.

gdb/testsuite/ChangeLog:

	* gdb.fortran/nested-funcs.exp: Tests for placing breakpoints on
	nested functions.
	* gdb.fortran/nested-funcs.f90: Update expected results.
	* gdb.fortran/nested-funcs-2.exp: New file.
	* gdb.fortran/nested-funcs-2.f90: New file.

gdb/doc/ChangeLog:

	* doc/gdb.texinfo (Fortran Operators): Describe scope operator.
2019-10-03 21:25:22 +01:00
Andrew Burgess
a8b3b8e93e gdb: Remove whitespace in 'std::vector <...>'
In the following 3 commits:

    commit df07e2c772dab40d268dc44c78bb087c4b75b3c6
    Date:   Wed Sep 25 16:10:50 2019 +0100

        gdb: Remove a use of VEC from dwarf2read.{c,h}

    commit 554ac434b02465f1fc925b0ae3393fb841e0d59c
    Date:   Thu Sep 19 13:17:59 2019 -0400

        gdb: Change a VEC to std::vector in btrace.{c,h}

    commit 46f29a9a260da1a03176682aff63bad03d8f2e8b
    Date:   Mon Sep 16 09:12:27 2019 -0400

        gdb: Remove a VEC from gdbsupport/btrace-common.h

I incorrectly wrote 'std::vector <...>' instead of 'std::vector<...>',
this commit fixes this mistake.  There should be no user visible
changes after this commit.

gdb/ChangeLog:

	* btrace.c (btrace_add_pc): Remove whitespace before the template
	parameter in 'std::vector <...>'.
	(parse_xml_btrace_block): Likewise.
	(btrace_maint_decode_pt): Likewise.
	(btrace_maint_update_packets): Likewise.
	(btrace_maint_print_packets): Likewise.
	* btrace.h (struct btrace_maint_info): Likewise.
	* dwarf2read.c (struct type_unit_group): Likewise.
	(build_type_psymtabs_reader): Likewise.
	* gdbsupport/btrace-common.c (btrace_data_append): Likewise.
	* gdbsupport/btrace-common.h (struct btrace_data_bts): Likewise.
	* nat/linux-btrace.c (perf_event_read_bts): Likewise.
2019-10-03 09:42:42 +01:00
Tom Tromey
4b610737f0 Handle copy relocations
In ELF, if a data symbol is defined in a shared library and used by
the main program, it will be subject to a "copy relocation".  In this
scenario, the main program has a copy of the symbol in question, and a
relocation that tells ld.so to copy the data from the shared library.
Then the symbol in the main program is used to satisfy all references.

This patch changes gdb to handle this scenario.  Data symbols coming
from ELF shared libraries get a special flag that indicates that the
symbol's address may be subject to copy relocation.

I looked briefly into handling copy relocations by looking at the
actual relocations in the main program, but this seemed difficult to
do with BFD.

Note that no caching is done here.  Perhaps this could be changed if
need be; I wanted to avoid possible problems with either objfile
lifetimes and changes, or conflicts with the long-term (vapor-ware)
objfile splitting project.

gdb/ChangeLog
2019-10-02  Tom Tromey  <tromey@adacore.com>

	* symmisc.c (dump_msymbols): Don't use MSYMBOL_VALUE_ADDRESS.
	* ada-lang.c (lesseq_defined_than): Handle
	LOC_STATIC.
	* dwarf2read.c (dwarf2_per_objfile): Add can_copy
	parameter.
	(dwarf2_has_info): Likewise.
	(new_symbol): Set maybe_copied on symbol when
	appropriate.
	* dwarf2read.h (dwarf2_per_objfile): Add can_copy
	parameter.
	<can_copy>: New member.
	* elfread.c (record_minimal_symbol): Set maybe_copied
	on symbol when appropriate.
	(elf_symfile_read): Update call to dwarf2_has_info.
	* minsyms.c (lookup_minimal_symbol_linkage): New
	function.
	* minsyms.h (lookup_minimal_symbol_linkage): Declare.
	* symtab.c (get_symbol_address, get_msymbol_address):
	New functions.
	* symtab.h (get_symbol_address, get_msymbol_address):
	Declare.
	(SYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_ADDRESS): Handle
	maybe_copied.
	(struct symbol, struct minimal_symbol) <maybe_copied>:
	New member.
2019-10-02 09:53:17 -06:00
Tom Tromey
38583298e0 Change SYMBOL_VALUE_ADDRESS to be an rvalue
This changes SYMBOL_VALUE_ADDRESS to be an rvalue.  The symbol readers
generally assign using this, so this also introduces
SET_SYMBOL_VALUE_ADDRESS and updates the readers.  Making this change
is useful in a subsequent patch, which redefined SYMBOL_VALUE_ADDRESS.

gdb/ChangeLog
2019-10-02  Tom Tromey  <tromey@adacore.com>

	* coffread.c (process_coff_symbol): Update.
	* dwarf2read.c (var_decode_location, new_symbol): Update.
	* mdebugread.c (parse_symbol): Update.
	* objfiles.c (relocate_one_symbol): Update.
	* stabsread.c (define_symbol, fix_common_block)
	(scan_file_globals): Update.
	* symtab.h (SYMBOL_VALUE_ADDRESS): Expand to an rvalue.
	(SET_SYMBOL_VALUE_ADDRESS): New macro.
	* xcoffread.c (process_xcoff_symbol): Update.
2019-10-02 09:53:17 -06:00
Andrew Burgess
df07e2c772 gdb: Remove a use of VEC from dwarf2read.{c,h}
Removes a use of VEC from dwarf2read.{c,h} and replaces it with
std::vector.  As far as possible this is a like for like replacement
with minimal refactoring.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* dwarf2read.c (struct type_unit_group) <tus>: Convert to
	std::vector.
	(build_type_psymtabs_reader): Update for std::vector.
	(build_type_psymtab_dependencies): Likewise.
	* dwarf2read.h: Remove use of DEF_VEC_P.
	(typedef sig_type_ptr): Delete.
2019-10-02 14:05:51 +01:00
Ali Tamur
8fe0f950f4 [PATCH v2 2/4] DWARF 5 support: Handle DW_FORM_strx
* Handle DW_FORM_strx forms everywhere.

Tested with CC=/usr/bin/gcc (version 8.3.0) against master branch (also with
-gsplit-dwarf and -gdwarf-4 flags) and there was no increase in the set of
tests that fails.

This is part of an effort to support DWARF 5 in gdb.

gdb/ChangeLog:

        * dwarf2read.c (skip_one_die): Handle DW_FORM_strx forms.
        (dwarf2_string_attr): Likewise.
2019-09-30 18:00:41 -07:00
Ali Tamur
5f48f8f3c3 Remove extra whitespaces at the end of lines.
gdb/ChangeLog:

	* dwarf2read.c (process_full_comp_unit): Remove whitespace at the EOL.
	(process_full_type_unit): Likewise.
	(dump_die_shallow): Likewise.
	(cu_debug_loc_section): Likewise.
2019-09-30 14:00:52 -07:00
Alan Modra
00f93c4492 bfd macro conversion to inline functions
This converts some of the macros that access struct bfd fields to
inline functions.

bfd/
	* archive.c (bfd_generic_archive_p): Use bfd_set_thin_archive.
	* bfd-in.h (bfd_get_filename, bfd_get_cacheable, bfd_get_format),
	(bfd_get_target, bfd_get_flavour, bfd_family_coff, bfd_big_endian),
	(bfd_little_endian, bfd_header_big_endian, bfd_header_little_endian),
	(bfd_get_file_flags, bfd_applicable_file_flags),
	(bfd_applicable_section_flags, bfd_has_map, bfd_is_thin_archive),
	(bfd_valid_reloc_types, bfd_usrdata, bfd_get_start_address),
	(bfd_get_symcount, bfd_get_outsymbols, bfd_count_sections),
	(bfd_get_dynamic_symcount, bfd_get_symbol_leading_char): Delete.
	* bfd/bfd.c (bfd_get_filename, bfd_get_cacheable, bfd_get_format),
	(bfd_get_file_flags, bfd_get_start_address, bfd_get_symcount),
	(bfd_get_dynamic_symcount, bfd_get_outsymbols, bfd_count_sections),
	(bfd_has_map, bfd_is_thin_archive, bfd_set_thin_archive),
	(bfd_usrdata, bfd_set_usrdata): New inline functions.
	* targets.c (bfd_get_target, bfd_get_flavour),
	(bfd_applicable_file_flags, bfd_family_coff, bfd_big_endian),
	(bfd_little_endian, bfd_header_big_endian),
	(bfd_header_little_endian, bfd_applicable_section_flags),
	(bfd_get_symbol_leading_char): New inline functions.
	* bfd-in2.h: Regenerate.
binutils/
	* ar.c (write_archive): Use bfd_set_thin_archive.
gdb/
	* gdb_bfd.c (gdb_bfd_ref, gdb_bfd_unref): Use bfd_set_usrdata.
	* dwarf2read.c (dwarf2_read_gdb_index, dwarf2_read_debug_names),
	(read_indirect_string_from_dwz): Use bfd accessor.
	* dwarf2read.h (struct dwz_file <filename>): Likewise.
	* machoread.c (macho_symfile_read_all_oso): Likewise.
	* solib.c (solib_bfd_open): Likewise.
ld/
	* ldelf.c (ldelf_after_open, ldelf_place_orphan
	* ldlang.c (walk_wild_file, lang_process): Use bfd_usrdata.
	(load_symbols, ldlang_add_file): Use bfd_set_usrdata.
	* ldmain.c (add_archive_element): Use bfd_usrdata.
	* ldlang.h (bfd_input_just_syms): New inline function.
	* emultempl/aarch64elf.em (build_section_lists): Use it.
	* emultempl/mmo.em (mmo_place_orphan): Likewise.
	* emultempl/pe.em (gld_${EMULATION_NAME}_place_orphan): Likewise.
	* emultempl/pep.em (gld_${EMULATION_NAME}_place_orphan): Likewise.
	* emultempl/ppc64elf.em (build_section_lists): Likewise.
sim/
	* ppc/emul_generic.c (emul_add_tree_options): Delete old bfd code.
2019-09-20 18:04:02 +09:30
Alan Modra
fd3619828e bfd_section_* macros
This large patch removes the unnecessary bfd parameter from various
bfd section macros and functions.  The bfd is hardly ever used and if
needed for the bfd_set_section_* or bfd_rename_section functions can
be found via section->owner except for the com, und, abs, and ind
std_section special sections.  Those sections shouldn't be modified
anyway.

The patch also removes various bfd_get_section_<field> macros,
replacing their use with bfd_section_<field>, and adds
bfd_set_section_lma.  I've also fixed a minor bug in gas where
compressed section renaming was done directly rather than calling
bfd_rename_section.  This would have broken bfd_get_section_by_name
and similar functions, but that hardly mattered at such a late stage
in gas processing.

bfd/
	* bfd-in.h (bfd_get_section_name, bfd_get_section_vma),
	(bfd_get_section_lma, bfd_get_section_alignment),
	(bfd_get_section_size, bfd_get_section_flags),
	(bfd_get_section_userdata): Delete.
	(bfd_section_name, bfd_section_size, bfd_section_vma),
	(bfd_section_lma, bfd_section_alignment): Lose bfd parameter.
	(bfd_section_flags, bfd_section_userdata): New.
	(bfd_is_com_section): Rename parameter.
	* section.c (bfd_set_section_userdata, bfd_set_section_vma),
	(bfd_set_section_alignment, bfd_set_section_flags, bfd_rename_section),
	(bfd_set_section_size): Delete bfd parameter, rename section parameter.
	(bfd_set_section_lma): New.
	* bfd-in2.h: Regenerate.
	* mach-o.c (bfd_mach_o_init_section_from_mach_o): Delete bfd param,
	update callers.
	* aoutx.h, * bfd.c, * coff-alpha.c, * coff-arm.c, * coff-mips.c,
	* coff64-rs6000.c, * coffcode.h, * coffgen.c, * cofflink.c,
	* compress.c, * ecoff.c, * elf-eh-frame.c, * elf-hppa.h,
	* elf-ifunc.c, * elf-m10200.c, * elf-m10300.c, * elf-properties.c,
	* elf-s390-common.c, * elf-vxworks.c, * elf.c, * elf32-arc.c,
	* elf32-arm.c, * elf32-avr.c, * elf32-bfin.c, * elf32-cr16.c,
	* elf32-cr16c.c, * elf32-cris.c, * elf32-crx.c, * elf32-csky.c,
	* elf32-d10v.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c,
	* elf32-ft32.c, * elf32-h8300.c, * elf32-hppa.c, * elf32-i386.c,
	* elf32-ip2k.c, * elf32-iq2000.c, * elf32-lm32.c, * elf32-m32c.c,
	* elf32-m32r.c, * elf32-m68hc1x.c, * elf32-m68k.c, * elf32-mcore.c,
	* elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c,
	* elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c,
	* elf32-nios2.c, * elf32-or1k.c, * elf32-ppc.c, * elf32-pru.c,
	* elf32-rl78.c, * elf32-rx.c, * elf32-s390.c, * elf32-score.c,
	* elf32-score7.c, * elf32-sh.c, * elf32-spu.c, * elf32-tic6x.c,
	* elf32-tilepro.c, * elf32-v850.c, * elf32-vax.c, * elf32-visium.c,
	* elf32-xstormy16.c, * elf32-xtensa.c, * elf64-alpha.c,
	* elf64-bpf.c, * elf64-hppa.c, * elf64-ia64-vms.c, * elf64-mmix.c,
	* elf64-ppc.c, * elf64-s390.c, * elf64-sparc.c, * elf64-x86-64.c,
	* elflink.c, * elfnn-aarch64.c, * elfnn-ia64.c, * elfnn-riscv.c,
	* elfxx-aarch64.c, * elfxx-mips.c, * elfxx-sparc.c,
	* elfxx-tilegx.c, * elfxx-x86.c, * i386msdos.c, * linker.c,
	* mach-o.c, * mmo.c, * opncls.c, * pdp11.c, * pei-x86_64.c,
	* peicode.h, * reloc.c, * section.c, * syms.c, * vms-alpha.c,
	* xcofflink.c: Update throughout for bfd section macro and function
	changes.
binutils/
	* addr2line.c, * bucomm.c, * coffgrok.c, * dlltool.c, * nm.c,
	* objcopy.c, * objdump.c, * od-elf32_avr.c, * od-macho.c,
	* od-xcoff.c, * prdbg.c, * rdcoff.c, * rddbg.c, * rescoff.c,
	* resres.c, * size.c, * srconv.c, * strings.c, * windmc.c: Update
	throughout for bfd section macro and function changes.
gas/
	* as.c, * as.h, * dw2gencfi.c, * dwarf2dbg.c, * ecoff.c,
	* read.c, * stabs.c, * subsegs.c, * subsegs.h, * write.c,
	* config/obj-coff-seh.c, * config/obj-coff.c, * config/obj-ecoff.c,
	* config/obj-elf.c, * config/obj-macho.c, * config/obj-som.c,
	* config/tc-aarch64.c, * config/tc-alpha.c, * config/tc-arc.c,
	* config/tc-arm.c, * config/tc-avr.c, * config/tc-bfin.c,
	* config/tc-bpf.c, * config/tc-d10v.c, * config/tc-d30v.c,
	* config/tc-epiphany.c, * config/tc-fr30.c, * config/tc-frv.c,
	* config/tc-h8300.c, * config/tc-hppa.c, * config/tc-i386.c,
	* config/tc-ia64.c, * config/tc-ip2k.c, * config/tc-iq2000.c,
	* config/tc-lm32.c, * config/tc-m32c.c, * config/tc-m32r.c,
	* config/tc-m68hc11.c, * config/tc-mep.c, * config/tc-microblaze.c,
	* config/tc-mips.c, * config/tc-mmix.c, * config/tc-mn10200.c,
	* config/tc-mn10300.c, * config/tc-msp430.c, * config/tc-mt.c,
	* config/tc-nds32.c, * config/tc-or1k.c, * config/tc-ppc.c,
	* config/tc-pru.c, * config/tc-rl78.c, * config/tc-rx.c,
	* config/tc-s12z.c, * config/tc-s390.c, * config/tc-score.c,
	* config/tc-score7.c, * config/tc-sh.c, * config/tc-sparc.c,
	* config/tc-spu.c, * config/tc-tic4x.c, * config/tc-tic54x.c,
	* config/tc-tic6x.c, * config/tc-tilegx.c, * config/tc-tilepro.c,
	* config/tc-v850.c, * config/tc-visium.c, * config/tc-wasm32.c,
	* config/tc-xc16x.c, * config/tc-xgate.c, * config/tc-xstormy16.c,
	* config/tc-xtensa.c, * config/tc-z8k.c: Update throughout for
	bfd section macro and function changes.
	* write.c (compress_debug): Use bfd_rename_section.
gdb/
	* aarch64-linux-tdep.c, * arm-tdep.c, * auto-load.c,
	* coff-pe-read.c, * coffread.c, * corelow.c, * dbxread.c,
	* dicos-tdep.c, * dwarf2-frame.c, * dwarf2read.c, * elfread.c,
	* exec.c, * fbsd-tdep.c, * gcore.c, * gdb_bfd.c, * gdb_bfd.h,
	* hppa-tdep.c, * i386-cygwin-tdep.c, * i386-fbsd-tdep.c,
	* i386-linux-tdep.c, * jit.c, * linux-tdep.c, * machoread.c,
	* maint.c, * mdebugread.c, * minidebug.c, * mips-linux-tdep.c,
	* mips-sde-tdep.c, * mips-tdep.c, * mipsread.c, * nto-tdep.c,
	* objfiles.c, * objfiles.h, * osabi.c, * ppc-linux-tdep.c,
	* ppc64-tdep.c, * record-btrace.c, * record-full.c, * remote.c,
	* rs6000-aix-tdep.c, * rs6000-tdep.c, * s390-linux-tdep.c,
	* s390-tdep.c, * solib-aix.c, * solib-dsbt.c, * solib-frv.c,
	* solib-spu.c, * solib-svr4.c, * solib-target.c,
	* spu-linux-nat.c, * spu-tdep.c, * symfile-mem.c, * symfile.c,
	* symmisc.c, * symtab.c, * target.c, * windows-nat.c,
	* xcoffread.c, * cli/cli-dump.c, * compile/compile-object-load.c,
	* mi/mi-interp.c: Update throughout for bfd section macro and
	function changes.
	* gcore (gcore_create_callback): Use bfd_set_section_lma.
	* spu-tdep.c (spu_overlay_new_objfile): Likewise.
gprof/
	* corefile.c, * symtab.c: Update throughout for bfd section
	macro and function changes.
ld/
	* ldcref.c, * ldctor.c, * ldelf.c, * ldlang.c, * pe-dll.c,
	* emultempl/aarch64elf.em, * emultempl/aix.em,
	* emultempl/armcoff.em, * emultempl/armelf.em,
	* emultempl/cr16elf.em, * emultempl/cskyelf.em,
	* emultempl/m68hc1xelf.em, * emultempl/m68kelf.em,
	* emultempl/mipself.em, * emultempl/mmix-elfnmmo.em,
	* emultempl/mmo.em, * emultempl/msp430.em,
	* emultempl/nios2elf.em, * emultempl/pe.em, * emultempl/pep.em,
	* emultempl/ppc64elf.em, * emultempl/xtensaelf.em: Update
	throughout for bfd section macro and function changes.
libctf/
	* ctf-open-bfd.c: Update throughout for bfd section macro changes.
opcodes/
	* arc-ext.c: Update throughout for bfd section macro changes.
sim/
	* common/sim-load.c, * common/sim-utils.c, * cris/sim-if.c,
	* erc32/func.c, * lm32/sim-if.c, * m32c/load.c, * m32c/trace.c,
	* m68hc11/interp.c, * ppc/hw_htab.c, * ppc/hw_init.c,
	* rl78/load.c, * rl78/trace.c, * rx/gdb-if.c, * rx/load.c,
	* rx/trace.c: Update throughout for bfd section macro changes.
2019-09-19 09:40:13 +09:30
Christian Biesinger
491144b5e2 Change boolean options to bool instead of int
This is for add_setshow_boolean_cmd as well as the gdb::option interface.

gdb/ChangeLog:

2019-09-17  Christian Biesinger  <cbiesinger@google.com>

	* ada-lang.c (ada_ignore_descriptive_types_p): Change to bool.
	(print_signatures): Likewise.
	(trust_pad_over_xvs): Likewise.
	* arch/aarch64-insn.c (aarch64_debug): Likewise.
	* arch/aarch64-insn.h (aarch64_debug): Likewise.
	* arm-linux-nat.c (arm_apcs_32): Likewise.
	* arm-linux-tdep.c (arm_apcs_32): Likewise.
	* arm-nbsd-nat.c (arm_apcs_32): Likewise.
	* arm-tdep.c (arm_debug): Likewise.
	(arm_apcs_32): Likewise.
	* auto-load.c (debug_auto_load): Likewise.
	(auto_load_gdb_scripts): Likewise.
	(global_auto_load): Likewise.
	(auto_load_local_gdbinit): Likewise.
	(auto_load_local_gdbinit_loaded): Likewise.
	* auto-load.h (global_auto_load): Likewise.
	(auto_load_local_gdbinit): Likewise.
	(auto_load_local_gdbinit_loaded): Likewise.
	* breakpoint.c (disconnected_dprintf): Likewise.
	(breakpoint_proceeded): Likewise.
	(automatic_hardware_breakpoints): Likewise.
	(always_inserted_mode): Likewise.
	(target_exact_watchpoints): Likewise.
	(_initialize_breakpoint): Update.
	* breakpoint.h (target_exact_watchpoints): Change to bool.
	* btrace.c (maint_btrace_pt_skip_pad): Likewise.
	* cli/cli-cmds.c (trace_commands): Likewise.
	* cli/cli-cmds.h (trace_commands): Likewise.
	* cli/cli-decode.c (add_setshow_boolean_cmd): Change int* argument
	to bool*.
	* cli/cli-logging.c (logging_overwrite): Change to bool.
	(logging_redirect): Likewise.
	(debug_redirect): Likewise.
	* cli/cli-option.h (option_def) <boolean>: Change return type to bool*.
	(struct boolean_option_def) <get_var_address_cb_>: Change return type
	to bool.
	<boolean_option_def>: Update.
	(struct flag_option_def): Change default type of Context to bool
	from int.
	<flag_option_def>: Change return type of var_address_cb_ to bool*.
	* cli/cli-setshow.c (do_set_command): Cast to bool* instead of int*.
	(get_setshow_command_value_string): Likewise.
	* cli/cli-style.c (cli_styling): Change to bool.
	(source_styling): Likewise.
	* cli/cli-style.h (source_styling): Likewise.
	(cli_styling): Likewise.
	* cli/cli-utils.h (struct qcs_flags) <quiet, cont, silent>: Change
	to bool.
	* command.h (var_types): Update comment.
	(add_setshow_boolean_cmd): Change int* var argument to bool*.
	* compile/compile-cplus-types.c (debug_compile_cplus_types): Change to
	bool.
	(debug_compile_cplus_scopes): Likewise.
	* compile/compile-internal.h (compile_debug): Likewise.
	* compile/compile.c (compile_debug): Likewise.
	(struct compile_options) <raw>: Likewise.
	* cp-support.c (catch_demangler_crashes): Likewise.
	* cris-tdep.c (usr_cmd_cris_version_valid): Likewise.
	(usr_cmd_cris_dwarf2_cfi): Likewise.
	* csky-tdep.c (csky_debug): Likewise.
	* darwin-nat.c (enable_mach_exceptions): Likewise.
	* dcache.c (dcache_enabled_p): Likewise.
	* defs.h (info_verbose): Likewise.
	* demangle.c (demangle): Likewise.
	(asm_demangle): Likewise.
	* dwarf-index-cache.c (debug_index_cache): Likewise.
	* dwarf2-frame.c (dwarf2_frame_unwinders_enabled_p): Likewise.
	* dwarf2-frame.h (dwarf2_frame_unwinders_enabled_p): Likewise.
	* dwarf2read.c (check_physname): Likewise.
	(use_deprecated_index_sections): Likewise.
	(dwarf_always_disassemble): Likewise.
	* eval.c (overload_resolution): Likewise.
	* event-top.c (set_editing_cmd_var): Likewise.
	(exec_done_display_p): Likewise.
	* event-top.h (set_editing_cmd_var): Likewise.
	(exec_done_display_p): Likewise.
	* exec.c (write_files): Likewise.
	* fbsd-nat.c (debug_fbsd_lwp): Likewise
	(debug_fbsd_nat): Likewise.
	* frame.h (struct frame_print_options) <print_raw_frame_arguments>:
	Likewise.
	(struct set_backtrace_options) <backtrace_past_main>: Likewise.
	<backtrace_past_entry> Likewise.
	* gdb-demangle.h (demangle): Likewise.
	(asm_demangle): Likewise.
	* gdb_bfd.c (bfd_sharing): Likewise.
	* gdbcore.h (write_files): Likewise.
	* gdbsupport/common-debug.c (show_debug_regs): Likewise.
	* gdbsupport/common-debug.h (show_debug_regs): Likewise.
	* gdbthread.h (print_thread_events): Likewise.
	* gdbtypes.c (opaque_type_resolution): Likewise.
	(strict_type_checking): Likewise.
	* gnu-nat.c (gnu_debug_flag): Likewise.
	* guile/scm-auto-load.c (auto_load_guile_scripts): Likewise.
	* guile/scm-param.c (pascm_variable): Add boolval.
	(add_setshow_generic): Update.
	(pascm_param_value): Update.
	(pascm_set_param_value_x): Update.
	* hppa-tdep.c (hppa_debug): Change to bool..
	* infcall.c (may_call_functions_p): Likewise.
	(coerce_float_to_double_p): Likewise.
	(unwind_on_signal_p): Likewise.
	(unwind_on_terminating_exception_p): Likewise.
	* infcmd.c (startup_with_shell): Likewise.
	* inferior.c (print_inferior_events): Likewise.
	* inferior.h (startup_with_shell): Likewise.
	(print_inferior_events): Likewise.
	* infrun.c (step_stop_if_no_debug): Likewise.
	(detach_fork): Likewise.
	(debug_displaced): Likewise.
	(disable_randomization): Likewise.
	(non_stop): Likewise.
	(non_stop_1): Likewise.
	(observer_mode): Likewise.
	(observer_mode_1): Likewise.
	(set_observer_mode): Update.
	(sched_multi): Change to bool.
	* infrun.h (debug_displaced): Likewise.
	(sched_multi): Likewise.
	(step_stop_if_no_debug): Likewise.
	(non_stop): Likewise.
	(disable_randomization): Likewise.
	* linux-tdep.c (use_coredump_filter): Likewise.
	(dump_excluded_mappings): Likewise.
	* linux-thread-db.c (auto_load_thread_db): Likewise.
	(check_thread_db_on_load): Likewise.
	* main.c (captured_main_1): Update.
	* maint-test-options.c (struct test_options_opts) <flag_opt, xx1_opt,
	xx2_opt, boolean_opt>: Change to bool.
	* maint-test-settings.c (maintenance_test_settings_boolean): Likewise.
	* maint.c (maintenance_profile_p): Likewise.
	(per_command_time): Likewise.
	(per_command_space): Likewise.
	(per_command_symtab): Likewise.
	* memattr.c (inaccessible_by_default): Likewise.
	* mi/mi-main.c (mi_async): Likewise.
	(mi_async_1): Likewise.
	* mips-tdep.c (mips64_transfers_32bit_regs_p): Likewise.
	* nat/fork-inferior.h (startup_with_shell): Likewise.
	* nat/linux-namespaces.c (debug_linux_namespaces): Likewise.
	* nat/linux-namespaces.h (debug_linux_namespaces): Likewise.
	* nios2-tdep.c (nios2_debug): Likewise.
	* or1k-tdep.c (or1k_debug): Likewise.
	* parse.c (parser_debug): Likewise.
	* parser-defs.h (parser_debug): Likewise.
	* printcmd.c (print_symbol_filename): Likewise.
	* proc-api.c (procfs_trace): Likewise.
	* python/py-auto-load.c (auto_load_python_scripts): Likewise.
	* python/py-param.c (union parmpy_variable): Add "bool boolval" field.
	(set_parameter_value): Update.
	(add_setshow_generic): Update.
	* python/py-value.c (copy_py_bool_obj): Change argument from int*
	to bool*.
	* python/python.c (gdbpy_parameter_value): Cast to bool* instead of
	int*.
	* ravenscar-thread.c (ravenscar_task_support): Change to bool.
	* record-btrace.c (record_btrace_target::store_registers): Update.
	* record-full.c (record_full_memory_query): Change to bool.
	(record_full_stop_at_limit): Likewise.
	* record-full.h (record_full_memory_query): Likewise.
	* remote-notif.c (notif_debug): Likewise.
	* remote-notif.h (notif_debug): Likewise.
	* remote.c (use_range_stepping): Likewise.
	(interrupt_on_connect): Likewise.
	(remote_break): Likewise.
	* ser-tcp.c (tcp_auto_retry): Likewise.
	* ser-unix.c (serial_hwflow): Likewise.
	* skip.c (debug_skip): Likewise.
	* solib-aix.c (solib_aix_debug): Likewise.
	* spu-tdep.c (spu_stop_on_load_p): Likewise.
	(spu_auto_flush_cache_p): Likewise.
	* stack.c (struct backtrace_cmd_options) <full, no_filters, hide>:
	Likewise.
	(struct info_print_options) <quiet>: Likewise.
	* symfile-debug.c (debug_symfile): Likewise.
	* symfile.c (auto_solib_add): Likewise.
	(separate_debug_file_debug): Likewise.
	* symfile.h (auto_solib_add): Likewise.
	(separate_debug_file_debug): Likewise.
	* symtab.c (basenames_may_differ): Likewise.
	(struct filename_partial_match_opts) <dirname, basename>: Likewise.
	(struct info_print_options) <quiet, exclude_minsyms>: Likewise.
	(struct info_types_options) <quiet>: Likewise.
	* symtab.h (demangle): Likewise.
	(basenames_may_differ): Likewise.
	* target-dcache.c (stack_cache_enabled_1): Likewise.
	(code_cache_enabled_1): Likewise.
	* target.c (trust_readonly): Likewise.
	(may_write_registers): Likewise.
	(may_write_memory): Likewise.
	(may_insert_breakpoints): Likewise.
	(may_insert_tracepoints): Likewise.
	(may_insert_fast_tracepoints): Likewise.
	(may_stop): Likewise.
	(auto_connect_native_target): Likewise.
	(target_stop_and_wait): Update.
	(target_async_permitted): Change to bool.
	(target_async_permitted_1): Likewise.
	(may_write_registers_1): Likewise.
	(may_write_memory_1): Likewise.
	(may_insert_breakpoints_1): Likewise.
	(may_insert_tracepoints_1): Likewise.
	(may_insert_fast_tracepoints_1): Likewise.
	(may_stop_1): Likewise.
	* target.h (target_async_permitted): Likewise.
	(may_write_registers): Likewise.
	(may_write_memory): Likewise.
	(may_insert_breakpoints): Likewise.
	(may_insert_tracepoints): Likewise.
	(may_insert_fast_tracepoints): Likewise.
	(may_stop): Likewise.
	* thread.c (struct info_threads_opts) <show_global_ids>: Likewise.
	(make_thread_apply_all_options_def_group): Change argument from int*
	to bool*.
	(thread_apply_all_command): Update.
	(print_thread_events): Change to bool.
	* top.c (confirm): Likewise.
	(command_editing_p): Likewise.
	(history_expansion_p): Likewise.
	(write_history_p): Likewise.
	(info_verbose): Likewise.
	* top.h (confirm): Likewise.
	(history_expansion_p): Likewise.
	* tracepoint.c (disconnected_tracing): Likewise.
	(circular_trace_buffer): Likewise.
	* typeprint.c (print_methods): Likewise.
	(print_typedefs): Likewise.
	* utils.c (debug_timestamp): Likewise.
	(sevenbit_strings): Likewise.
	(pagination_enabled): Likewise.
	* utils.h (sevenbit_strings): Likewise.
	(pagination_enabled): Likewise.
	* valops.c (overload_resolution): Likewise.
	* valprint.h (struct value_print_options) <prettyformat_arrays,
	prettyformat_structs, vtblprint, unionprint, addressprint, objectprint,
	stop_print_at_null, print_array_indexes, deref_ref, static_field_print,
	pascal_static_field_print, raw, summary, symbol_print, finish_print>:
	Likewise.
	* windows-nat.c (new_console): Likewise.
	(cygwin_exceptions): Likewise.
	(new_group): Likewise.
	(debug_exec): Likewise.
	(debug_events): Likewise.
	(debug_memory): Likewise.
	(debug_exceptions): Likewise.
	(useshell): Likewise.
	* windows-tdep.c (maint_display_all_tib): Likewise.
	* xml-support.c (debug_xml): Likewise.
2019-09-18 09:35:12 +09:00
Christian Biesinger
67547d896b Change the type of copy_names from int to bool
This parameter is really a boolean, so change the type accordingly
and update the callers.

This is for symbol_set_names, add_psymbol_to_bcache, and
add_psymbol_to_list.

minimal_symbol_reader::record_full was already passing a bool
to symbol_set_names.

gdb/ChangeLog:

2019-09-11  Christian Biesinger  <cbiesinger@google.com>

	* dbxread.c (read_dbx_symtab): Update.
	* dwarf2read.c (load_partial_dies): Update.
	* mdebugread.c (parse_partial_symbols): Update.
	(handle_psymbol_enumerators): Update.
	* psympriv.h (add_psymbol_to_list): Change type of copy_names to bool.
	* psymtab.c (add_psymbol_to_bcache): Likewise.
	(add_psymbol_to_list): Likewise.
	* symtab.c (symbol_set_names): Likewise.
	* symtab.h (symbol_set_names): Likewise.
	* xcoffread.c (scan_xcoff_symtab): Update.
2019-09-11 12:43:45 -05:00
Tom Tromey
3b00ef10a2 Add Ada support for .debug_names
This patch adds support for Ada to .debug_names.  I opted to leave
.gdb_index alone, because in my view it is a defunct format.

gdb/ChangeLog
2019-09-10  Tom Tromey  <tromey@adacore.com>

	* dwarf-index-write.c (write_psymbols): Extend error message.
	(debug_names::insert): Add Ada code.
	(debug_names::write_psymbols): Remove Ada check.
	(debug_names) <m_string_obstack>: New member.
	* dwarf2read.c (gdb_index_symbol_name_matcher): Remove.
	(gdb_index_symbol_name_matcher::matches): Remove.
	(mapped_index_base::find_name_components_bounds): Add "lang"
	parameter.
	(mapped_index_base::build_name_components): Also split names
	according to Ada syntax.
	(dw2_expand_symtabs_matching_symbol): Loop over languages.  Change
	type of "match_callback".
	(check_match, check_find_bounds_finds)
	(dw2_expand_symtabs_matching): Update.
	(dw2_debug_names_iterator): Add new constructor.
	(dw2_debug_names_map_matching_symbols): New function.
	(dw2_debug_names_expand_symtabs_matching): Update.
	(dwarf2_debug_names_functions): Use
	dw2_debug_names_map_matching_symbols.
2019-09-10 08:30:45 -06:00
Tom Tromey
aa39165480 Fix latent bug in .debug_names file-name handling
An internal Ada test case showed that the .debug_names code does not
compute the same list of file names as the partial symbol reader.  In
particular, the partial symbol reader uses the DW_AT_name of the CU:

  /* Allocate a new partial symbol table structure.  */
  filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu);
  if (filename == NULL)
    filename = "";

  pst = create_partial_symtab (per_cu, filename);

This patch changes the .debug_names reader to follow.

gdb/ChangeLog
2019-09-10  Tom Tromey  <tromey@adacore.com>

	* dwarf2read.c (dw2_get_file_names_reader): Add the
	CU's file name to the results.

gdb/testsuite/ChangeLog
2019-09-10  Tom Tromey  <tromey@adacore.com>

	* gdb.ada/dgopt.exp: New file.
	* gdb.ada/dgopt/x.adb: New file.
2019-09-10 08:30:45 -06:00
Tom Tromey
b054970d54 Change map_matching_symbols to take a lookup_name_info
This patch further simplifies the map_matching_symbols callback, by
having it take a lookup_name_info rather than a plain string.

gdb/ChangeLog
2019-09-10  Tom Tromey  <tromey@adacore.com>

	* ada-lang.c (add_nonlocal_symbols): Combine calls to
	map_matching_symbols.  Update.
	* dwarf2read.c (dw2_map_matching_symbols): Update.
	* psymtab.c (match_partial_symbol): Change type; update.
	(psym_map_matching_symbols): Likewise.
	* symfile-debug.c (debug_qf_map_matching_symbols): Change
	type; update.
	* symfile.h (struct quick_symbol_functions)
	<map_matching_symbols>: Change "name" to be a lookup_name_info.
	Remove "match".
2019-09-10 08:30:45 -06:00
Tom Tromey
199b4314ef Change map_matching_symbols to take a symbol_found_callback_ftype
This changes map_matching_symbols to take a
symbol_found_callback_ftype, rather than separate callback and data
parameters.  This enables a future patch to clean up some existing
code so that it can more readily be shared.

gdb/ChangeLog
2019-09-10  Tom Tromey  <tromey@adacore.com>

	* ada-lang.c (aux_add_nonlocal_symbols): Change type.
	(add_nonlocal_symbols): Update.
	* dwarf2read.c (dw2_map_matching_symbols): Change type.
	* psymtab.c (map_block, psym_map_matching_symbols): Change type.
	* symfile-debug.c (debug_qf_map_matching_symbols): Change type.
	* symfile.h (struct quick_symbol_functions) <map_matching_symbols>:
	Change type of "callback".  Remove "data".
2019-09-10 08:30:45 -06:00
Ali Tamur
a084a2a6a1 DWARF 5 support: Handle dwo_id
* DW_UT_skeleton and DW_UT_split_compile compilation units have dwo ids
to match the compilation unit in the skeleton and .dwo files. The dwo_id is
in the header.

Tested with CC=/usr/bin/gcc (version 8.3.0) against master branch (also with
-gsplit-dwarf and -gdwarf-4 flags) and there was no increase in the set of
tests that fails.

This is part of an effort to support DWARF 5 in gdb.

gdb/ChangeLog:

        * dwarf2read.c (comp_unit_head): Update comment.
        (dwarf2_dwo_name): New function declaration.
        (dwarf_unit_type_name): New function declaration.
        (read_comp_unit_head): Add support for new compilation units,
        DW_UT_partial, DW_UT_skeleton, DW_UT_split_compile, DW_UT_split_type.
        Particularly, DW_UT_skeleton and DW_UT_split_compile have dwo_id
        (currently named as "signature") in their header. Also clarify error
        messages.
        (lookup_dwo_id): New function. Returns the dwo id of the given
        compile unit.
        (lookup_dwo_unit): Use the new lookup_dwo_id function.
        (init_cutu_and_read_dies): Use the new dwarf2_dwo_name and lookup_dwo_id
        functions.
        (create_dwo_cu_reader): Use the added lookup_dwo_id function.
        (dwarf2_dwo_name): Get the dwo name if present.
        (dwarf_unit_type_name): Convert DW_UT_* types to string for diagnostic
        purposes.
2019-09-09 18:35:43 -07:00
Simon Marchi
c7f839cbf0 Change lookup_symbol's block_index parameter type to block_enum
The only two values valid to pass to the block_index parameter of
quick_symbol_functions::lookup_symbol are GLOBAL_BLOCK and STATIC_BLOCK,
part of enum block_enum.  Change the type of that parameter to
block_enum.

Change also the block_index field of dw2_symtab_iterator in the same
way..  This makes it consistent with dw2_debug_names_iterator, which
already uses block_enum for its block_index field.

This is a follow-up to this thread:

https://sourceware.org/ml/gdb-patches/2019-08/msg00097.html

gdb/ChangeLog:

	* dwarf2read.c (struct dw2_symtab_iterator) <block_index>:
	Change type to gdb::optional<block_enum>.
	(dw2_symtab_iter_init): Change block_index parameter type
	to gdb::optional<block_enum>.
	(dw2_lookup_symbol): Change block_index parameter
	type to block_enum.c
	(dw2_debug_names_lookup_symbol): Likewise.
	* psymtab.c (psym_lookup_symbol): Likewise.
	* symfile-debug.c (debug_qf_lookup_symbol): Likewise.
	* symfile.h (struct quick_symbol_functions) <lookup_symbol>:
	Likewise.
2019-09-07 12:06:01 -04:00
Tom Tromey
4e962e74e4 Handle biased types
In Ada, the programmer can request that a range type with a non-zero
base be stored in the minimal number of bits required for the range.
This is done by biasing the values; so, for example, a range of -7..-4
may be stored as two bits with a bias of -7.

This patch implements this for gdb.  It is done by adding a bias to
struct range_bounds and then adjusting a few spots to handle this.

The test case is written to use -fgnat-encodings=minimal, but a future
compiler patch will change the compiler to emit DW_AT_GNU_bias with
-fgnat-encodings=gdb.  It seemed good to get the gdb patch in first.

Tested on x86-64 Fedora 29; plus a variety of targets using AdaCore's
internal test suite.

gdb/ChangeLog
2019-09-03  Tom Tromey  <tromey@adacore.com>

	* ada-valprint.c (ada_val_print_num): Don't recurse for range
	types.
	(has_negatives): Unbias a range type bound.
	* dwarf2read.c (read_subrange_type): Handle DW_AT_GNU_bias.
	* gdbtypes.c (operator==): Handle new field.
	(create_range_type): Add "bias" parameter.
	(create_static_range_type, resolve_dynamic_range): Update.
	* gdbtypes.h (struct range_bounds) <bias>: New member.
	(create_range_type): Add bias parameter.
	* printcmd.c (print_scalar_formatted): Unbias range types.
	* value.c (unpack_long): Unbias range types.
	(pack_long): Bias range types.

gdb/testsuite/ChangeLog
2019-09-03  Tom Tromey  <tromey@adacore.com>

	* gdb.ada/bias.exp: New file.
	* gdb.ada/bias/bias.adb: New file.
	* gdb.ada/print_chars.exp: Add regression test.
	* gdb.ada/print_chars/foo.adb (My_Character): New type.
	(MC): New variable.
2019-09-03 10:20:40 -06:00
Simon Marchi
23c13d4299 dwarf2read: fix compilation issue with gcc 4.8
gcc 4.8 (and probably other versions too) doesn't like that the local
variable symbol_linkage has the same name as the enum class defined in
the same context:

      CXX    dwarf2read.o
    /home/smarchi/src/binutils-gdb/gdb/dwarf2read.c: In member function ‘dwarf2_per_cu_data* dw2_debug_names_iterator::next()’:
    /home/smarchi/src/binutils-gdb/gdb/dwarf2read.c:5850:22: error: ‘symbol_linkage’ is not a class, namespace, or enumeration
       } symbol_linkage = symbol_linkage::unknown;
                      ^

Rename the local variable to avoid this.

This problem was originally reported with the Netbsd builder on the
buildbot, which uses gcc 5.5, I believe.  I am not able to test it on
that builder right now, but chances are that the fix will work there
too.

gdb/ChangeLog:

	* dwarf2read.c (dw2_debug_names_iterator::next): Rename local
	variable symbol_linkage to symbol_linkage_.
2019-08-25 21:30:12 -04:00
Simon Marchi
beadd3e84e dwarf2read: replace gdb::optional<bool> with enum
gdb::optional<bool> is dangerous, because it's easy to do:

  if (opt_bool)

when you actually meant

  if (*opt_bool)

or vice-versa.  The first checks if the optional is set, the second
checks if the wrapped bool is true.

Replace it with an enum that explicitly defines the three possible
states.

gdb/ChangeLog:

	* dwarf2read.c (dw2_debug_names_iterator::next): Use enum to
	represent whether the symbol is static, dynamic, or we don't
	know.
2019-08-25 18:09:47 -04:00
Tom de Vries
eba4caf231 [gdb] Fix gdb.dwarf2/varval.exp with -fPIE/-pie
With target board unix/-fPIE/-pie, we get:
...
FAIL: gdb.dwarf2/varval.exp: print varval2
...

This is due comparing a get_frame_pc result (which includes the for PIE
non-zero relocation offset) with pc_high and pc_low obtained using
get_scope_pc_bounds (which do not include the relocation offset).

Fix this by adjusting pc_high and pc_low with the relocation offset.

Tested on x86_64-linux with target board unix/-fPIE/-pie.

gdb/ChangeLog:

2019-08-09  Tom de Vries  <tdevries@suse.de>

	PR gdb/24591
	* dwarf2read.c (dwarf2_fetch_die_loc_sect_off): Adjust pc_high and
	pc_low with relocation offset.
2019-08-09 06:49:04 +02:00
Tom Tromey
0cf9feb996 Introduce obstack_strndup
This introduces obstack_strndup and changes gdb to use it.

Note that obstack_strndup works like savestring, and not exactly like
xstrndup.  The difference is that obstack_strndup uses the passed-in
length, while xstrndup uses strnlen to choose the length.

gdb/ChangeLog
2019-08-06  Tom Tromey  <tom@tromey.com>

	* stabsread.c (patch_block_stabs, read_one_struct_field)
	(read_enum_type): Use obstack_strndup.
	* rust-exp.y (rust_parser::copy_name): Use obstack_strndup.
	* gdb_obstack.h (obstack_strndup): Use obstack_strndup.
	* dwarf2read.c (guess_full_die_structure_name)
	(anonymous_struct_prefix): Use obstack_strndup.
	* dbxread.c (cp_set_block_scope): Use obstack_strndup.
	* c-exp.y (yylex): Use obstack_strndup.
	* ada-exp.y (write_object_renaming, write_ambiguous_var)
	(write_var_or_type): Use obstack_strndup.
2019-08-06 20:08:48 -06:00
Tom Tromey
efba19b06a Add obstack_strdup overload taking a std::string
This adds an obstack_strdup overload that takes a std::string, and
changes a few spots in gdb to use it.

gdb/ChangeLog
2019-08-06  Tom Tromey  <tom@tromey.com>

	* symfile.c (reread_symbols): Use obstack_strdup.
	* stabsread.c (read_type): Use obstack_strdup.
	* gdb_obstack.h (obstack_strdup): New overload.
	* dwarf2read.c (dwarf2_compute_name, create_dwo_unit_in_dwp_v1)
	(create_dwo_unit_in_dwp_v2, build_error_marker_type)
	(dwarf2_canonicalize_name): Use obstack_strdup.
	* dbxread.c (read_dbx_symtab): Use obstack_strdup.
	* cp-support.c (inspect_type, replace_typedefs_qualified_name):
	Use obstack_strdup.
2019-08-06 20:08:48 -06:00
Tom Tromey
021887d88a Use obstack_strdup more
This changes gdb to use obstack_strdup when appropriate, rather than
the wordier obstack_copy0.

gdb/ChangeLog
2019-08-06  Tom Tromey  <tom@tromey.com>

	* xcoffread.c (SYMNAME_ALLOC, process_xcoff_symbol): Use
	obstack_strdup.
	* typeprint.c (typedef_hash_table::find_global_typedef): Use
	obstack_strdup.
	* symfile.c (allocate_compunit_symtab): Use obstack_strdup.
	* stabsread.c (common_block_start): Use obstack_strdup.
	* objfiles.c (set_objfile_main_name, objfile): Use
	obstack_strdup.
	* namespace.c (add_using_directive): Use obstack_strdup.
	* mdebugread.c (parse_symbol, parse_type): Use obstack_strdup.
	* jit.c (finalize_symtab): Use obstack_strdup.
	* dwarf2read.c (fixup_go_packaging, dwarf2_physname)
	(guess_partial_die_structure_name, partial_die_info::fixup)
	(dwarf2_name): Use obstack_strdup.
	* coffread.c (coff_read_struct_type, coff_read_enum_type): Use
	obstack_strdup.
	* c-exp.y (scan_macro_expansion): Use obstack_strdup.
	* buildsym.c (buildsym_compunit::end_symtab_with_blockvector): Use
	obstack_strdup.
	* ada-lang.c (ada_decode_symbol): Use obstack_strdup.
2019-08-06 20:08:48 -06:00
Philippe Waroquiers
590042fc45 Make first and last lines of 'command help documentation' consistent.
With this patch, the help docs now respect 2 invariants:
  * The first line of a command help is terminated by a '.' character.
  * The last character of a command help is not a newline character.

Note that the changes for the last invariant were done by Tom, as part of :
 [PATCH] Remove trailing newlines from help text
 https://sourceware.org/ml/gdb-patches/2019-06/msg00050.html
but some occurrences have been re-introduced since then.

Some help docs had to be rephrased/restructured to respect the above
invariants.

Before this patch, print_doc_line was printing the first line
of a command help documentation, but stopping at the first '.'
or ',' character.

This was giving inconsistent results :
  * The first line of command helps was sometimes '.' terminated,
    sometimes not.
  * The first line of command helps was not always designed to be
    readable/understandable/unambiguous when stopping at the first
    '.' or ',' character.

This e.g. created the following inconsistencies/problems:
< catch exception -- Catch Ada exceptions
< catch handlers -- Catch Ada exceptions
< catch syscall -- Catch system calls by their names
< down-silently -- Same as the `down' command
while the new help is:
> catch exception -- Catch Ada exceptions, when raised.
> catch handlers -- Catch Ada exceptions, when handled.
> catch syscall -- Catch system calls by their names, groups and/or numbers.
> down-silently -- Same as the `down' command, but does not print anything.

Also, the command help doc should not be terminated by a newline
character, but this was not respected by all commands.
The cli-option -OPT framework re-introduced some occurences.
So, the -OPT build help framework was changed to not output newlines at the
end of %OPTIONS% replacement.

This patch changes the help documentations to ensure the 2 invariants
given above.

It implied to slightly rephrase or restructure some help docs.

Based on the above invariants, print_doc_line (called by
'apropos' and 'help' commands to print the first line of a command
help) now outputs the full first line of a command help.

This all results in a lot of small changes in the produced help docs.
There are less code changes than changes in the help docs, as a lot
of docs are produced by some code (e.g. the remote packet usage settings).

gdb/ChangeLog
2019-08-07  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* cli/cli-decode.h (print_doc_line): Add for_value_prefix argument.
	* cli/cli-decode.c (print_doc_line): Likewise.  It now prints
	the full first line, except when FOR_VALUE_PREFIX.  In this case,
	the trailing '.' is not output, and the first character is uppercased.
	(print_help_for_command): Update call to print_doc_line.
	(print_doc_of_command): Likewise.
	* cli/cli-setshow.c (deprecated_show_value_hack): Likewise.
	* cli/cli-option.c (append_indented_doc): Do not append newline.
	(build_help_option): Append newline after first appended_indented_doc
	only if a second call is done.
	(build_help): Append 2 new lines before each option, except the first
	one.
	* compile/compile.c (_initialize_compile): Add new lines after
	%OPTIONS%, when not at the end of the help.
	Change help doc or code
	producing the help doc to respect the invariants.
	* maint-test-options.c (_initialize_maint_test_options): Likewise.
	Also removed the new line after 'Options:', as all other commands
	do not put an empty line between 'Options:' and the first option.
	* printcmd.c (_initialize_printcmd): Likewise.
	* stack.c (_initialize_stack): Likewise.
	* interps.c (interpreter_exec_cmd): Fix "Usage:" line that was
	incorrectly telling COMMAND is optional.
	* ada-lang.c (_initialize_ada_language): Change help doc or code
	producing the help doc to respect the invariants.
	* ada-tasks.c (_initialize_ada_tasks): Likewise.
	* breakpoint.c (_initialize_breakpoint): Likewise.
	* cli/cli-cmds.c (_initialize_cli_cmds): Likewise.
	* cli/cli-logging.c (_initialize_cli_logging): Likewise.
	* cli/cli-setshow.c (_initialize_cli_setshow): Likewise.
	* cli/cli-style.c (cli_style_option::add_setshow_commands,
	_initialize_cli_style): Likewise.
	* corelow.c (core_target_info): Likewise.
	* dwarf-index-cache.c (_initialize_index_cache): Likewise.
	* dwarf2read.c (_initialize_dwarf2_read): Likewise.
	* filesystem.c (_initialize_filesystem): Likewise.
	* frame.c (_initialize_frame): Likewise.
	* gnu-nat.c (add_task_commands): Likewise.
	* infcall.c (_initialize_infcall): Likewise.
	* infcmd.c (_initialize_infcmd): Likewise.
	* interps.c (_initialize_interpreter): Likewise.
	* language.c (_initialize_language): Likewise.
	* linux-fork.c (_initialize_linux_fork): Likewise.
	* maint-test-settings.c (_initialize_maint_test_settings): Likewise.
	* maint.c (_initialize_maint_cmds): Likewise.
	* memattr.c (_initialize_mem): Likewise.
	* printcmd.c (_initialize_printcmd): Likewise.
	* python/lib/gdb/function/strfns.py (_MemEq, _StrLen, _StrEq,
	_RegEx): Likewise.
	* ravenscar-thread.c (_initialize_ravenscar): Likewise.
	* record-btrace.c (_initialize_record_btrace): Likewise.
	* record-full.c (_initialize_record_full): Likewise.
	* record.c (_initialize_record): Likewise.
	* regcache-dump.c (_initialize_regcache_dump): Likewise.
	* regcache.c (_initialize_regcache): Likewise.
	* remote.c (add_packet_config_cmd, init_remote_threadtests,
	_initialize_remote): Likewise.
	* ser-tcp.c (_initialize_ser_tcp): Likewise.
	* serial.c (_initialize_serial): Likewise.
	* skip.c (_initialize_step_skip): Likewise.
	* source.c (_initialize_source): Likewise.
	* stack.c (_initialize_stack): Likewise.
	* symfile.c (_initialize_symfile): Likewise.
	* symtab.c (_initialize_symtab): Likewise.
	* target-descriptions.c (_initialize_target_descriptions): Likewise.
	* top.c (init_main): Likewise.
	* tracefile-tfile.c (tfile_target_info): Likewise.
	* tracepoint.c (_initialize_tracepoint): Likewise.
	* tui/tui-win.c (_initialize_tui_win): Likewise.
	* utils.c (add_internal_problem_command): Likewise.
	* valprint.c (value_print_option_defs): Likewise.

gdb/testsuite/ChangeLog
2019-08-07  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* gdb.base/style.exp: Update tests for help doc new invariants.
	* gdb.base/help.exp: Likewise.
2019-08-07 00:04:33 +02:00
Simon Marchi
2b79f3761c Remove some variables in favor of using gdb::optional
While reading that code, I noticed that some variables essentially meant
whether to consider some other variable or not.  I think using
gdb::optional (which was not available when this code was written) is
clearer, as it embeds the used/not used predicate directly in the type
of the variable, making it harder to miss.

gdb/ChangeLog:

	* dwarf2read.c (struct dw2_symtab_iterator):
	<want_specific_block>: Remove.
	<block_index>: Change type to gdb::optional.
	(dw2_symtab_iter_init): Remove WANT_SPECIFIC_BLOCK parameter,
	change type of BLOCK_INDEX parameter to gdb::optional.
	(dw2_symtab_iter_next): Re-write in function of gdb::optional.
	(dw2_lookup_symbol): Don't pass argument for
	WANT_SPECIFIC_BLOCK.
	(dw2_expand_symtabs_for_function): Don't pass argument for
	WANT_SPECIFIC_BLOCK, pass empty optional for BLOCK_INDEX.
	(class dw2_debug_names_iterator)
	<dw2_debug_names_iterator>: Remove WANT_SPECIFIC_BLOCK
	parameter, change BLOCK_INDEX type to gdb::optional.
	<m_want_specific_block>: Remove.
	<m_block_index>: Change type to gdb::optional.
	(dw2_debug_names_iterator::next): Change type of IS_STATIC to
	gdb::optional.  Re-write in function of gdb::optional.
	(dw2_debug_names_lookup_symbol): Don't pass argument for
	WANT_SPECIFIC_BLOCK.
	(dw2_debug_names_expand_symtabs_for_function): Don't pass
	argument for WANT_SPECIFIC_BLOCK, pass empty optional for
	BLOCK_INDEX.
2019-08-04 22:44:05 -04:00
Andrew Burgess
9a49df9d4b gdb: Carry default property type around with dynamic properties
This commit is preparation for the next one, with the aim of better
supporting signed dynamic properties on targets where the address size
specified in the DWARF headers is smaller than a CORE_ADDR, for
example debugging an i386 application on x86-64.

Consider this small Fortran program 'bounds.f90':

    program test
      integer, allocatable :: array (:)
      allocate (array (-5:5))
      array(3) = 1
    end program test

Compiled with 'gfortran -m32 -g3 -O0 -o bounds bounds.f90'.  The DWARF
for 'array' looks like this:

   <2><97>: Abbrev Number: 10 (DW_TAG_variable)
      <98>   DW_AT_name        : (indirect string, offset: 0x0): array
      <9c>   DW_AT_decl_file   : 1
      <9d>   DW_AT_decl_line   : 2
      <9e>   DW_AT_type        : <0xaf>
      <a2>   DW_AT_location    : 2 byte block: 91 58              (DW_OP_fbreg: -40)
   <2><a5>: Abbrev Number: 11 (DW_TAG_lexical_block)
      <a6>   DW_AT_low_pc      : 0x80485c3
      <aa>   DW_AT_high_pc     : 0x8b
   <2><ae>: Abbrev Number: 0
   <1><af>: Abbrev Number: 12 (DW_TAG_array_type)
      <b0>   DW_AT_data_location: 2 byte block: 97 6              (DW_OP_push_object_address; DW_OP_deref)
      <b3>   DW_AT_allocated   : 4 byte block: 97 6 30 2e         (DW_OP_push_object_address; DW_OP_deref; DW_OP_lit0; DW_OP_ne)
      <b8>   DW_AT_type        : <0x2a>
   <2><bc>: Abbrev Number: 13 (DW_TAG_subrange_type)
      <bd>   DW_AT_lower_bound : 4 byte block: 97 23 10 6         (DW_OP_push_object_address; DW_OP_plus_uconst: 16; DW_OP_deref)
      <c2>   DW_AT_upper_bound : 4 byte block: 97 23 14 6         (DW_OP_push_object_address; DW_OP_plus_uconst: 20; DW_OP_deref)
      <c7>   DW_AT_byte_stride : 6 byte block: 97 23 c 6 34 1e    (DW_OP_push_object_address; DW_OP_plus_uconst: 12; DW_OP_deref; DW_OP_lit4; DW_OP_mul)
   <2><ce>: Abbrev Number: 0

If we look at the DW_AT_lower_bound attribute, which will become a
dynamic property that GDB evaluates when needed by calling
dwarf2_evaluate_property.

The process of evaluating a dynamic property requires GDB to execute
each DW_OP_* operation, the results of these operations is held on a
stack of 'struct value *'s.

When the entire expression is evaluated the result is on top of the
stack.

If we look at DW_AT_lower_bound then the last operation is
DW_OP_deref, this loads a signed address the size of which matches the
DWARF address size, and so in our i386 on x86-64 situation, the top of
the stack will be a signed 4-byte value.

The problem is how these values are fetched from the stack.  Currently
they are always fetched by a call to dwarf_expr_context::fetch_address,
which converts the value to an unsigned value with a length matching
the values current length, before converting to a CORE_ADDR.  This
means we loose the signed nature of the property.

I wonder if the best solution for dealing with signed properties will
be to move away from an over reliance on fetch_address, and instead
come up with a new solution that considers the current type of the
value on the stack, and the type that the value needs to become;
basically a solution built around casting rather than assuming we
always want an address.

However, before we can start to even think about moving away from
fetch_address, there is a more urgent issue to fix, which is we don't
currently know what type each property should be.  We just hold the
value of the property in a CORE_ADDR as returned by fetch_address, and
rely on higher level code (outside of the DWARF expression evaluation
code) to fix things up for us.  This is what this patch aims to
address.

When creating a dynamic property (see attr_to_dynamic_prop in
dwarf2read.c) we can sometimes figure out the type of a property; if
the property is a reference to another DIE then it will have a
DW_AT_type attribute.

However, the DW_AT_lower_bound case above isn't a reference to another
DIE, it's just a DWARF expression.  We don't have any indication for
what type the property should have.

Luckily, the DWARF spec helps us out, for the lower and upper bounds
5.13 of the DWARFv5 spec tells us that without any other type
information the bounds are signed integers the same size as a DWARF
address.

It is my belief that we can find a suitable default type for every
dynamic property, either specified explicitly in the DWARF spec, or we
can infer an obvious choice if the spec doesn't help us.

This commit extends the creation of all dynamic properties to include
suggesting a suitable default type, all dynamic properties now always
carry their type around with them.

In later commits we can use this property type to ensure that the
value we extract from the DWARF stack is handled in a suitable manor
to correctly maintain its sign extension.

There should be no user visible changes from this commit.  The actual
fix to correctly support negative array bounds will come later.

gdb/ChangeLog:

	* dwarf2loc.c (dwarf2_evaluate_property): Update to take account
	of changes to field names, and use new is_reference field to
	decide if a property is a reference or not.
	* dwarf2loc.h (struct dwarf2_locexpr_baton): Add 'is_reference'
	field.
	(struct dwarf2_property_baton): Update header comment, rename
	'referenced_type' to 'property_type' and update comments.
	* dwarf2read.c (attr_to_dynamic_prop): Add extra parameter to hold
	default property type, store in property baton, update to take
	accound of renamed field.
	(read_func_scope): Update call to attr_to_dynamic_prop.
	(read_array_type): Likewise.
	(dwarf2_per_cu_addr_sized_int_type): New function.
	(read_subrange_index_type): Move type finding code to
	dwarf2_per_cu_addr_sized_int_type.
	(read_subrange_type): Update calls to attr_to_dynamic_prop.
	(dwarf2_per_cu_addr_type): New function.
	(set_die_type): Update calls to attr_to_dynamic_prop.
2019-07-12 12:09:54 +01:00
Andrew Burgess
b86352cfc1 gdb/dwarf: Ensure the target type of ranges is not void
If a DW_TAG_subrange_type DWARF entry has no DW_AT_type then a default
type based on the size of an address on the current target is assumed.
We store this type as the target type for GDB's range types.

Currently GDB can create ranges for which the target type is VOID,
this is incorrect but seems to cause no problems. I believe the reason
this doesn't cause any issues is because the languages (for example
Ada) that actually make use of a ranges target type also have
compilers that generate DWARF that includes a DW_AT_type attribute.

However, gfortran does not include a DW_AT_type, its DWARF instead
relies on the default target type.  This isn't currently a problem for
GDB as gfortran doesn't make use of the target type when printing
subranges, but it shouldn't hurt to fix this issue now.

I've added an assert into create_range_type that will catch this issue
if it comes up again.

This was tested on an x86-64/GNU-Linux machine with both the Ada and
gfortran compilers available with both '--target_board=unix' and
'--target_board=unix/-m32'.  There are no user visible changes after
this commit.

gdb/ChangeLog:

	* dwarf2read.c (read_subrange_index_type): New function.
	(read_subrange_type): Move code into new function and call it.
	* gdbtypes.c (create_range_type): Add some asserts.
2019-07-12 12:09:53 +01:00
Tom Tromey
268a13a5a3 Rename common to gdbsupport
This is the next patch in the ongoing series to move gdbsever to the
top level.

This patch just renames the "common" directory.  The idea is to do
this move in two parts: first rename the directory (this patch), then
move the directory to the top.  This approach makes the patches a bit
more tractable.

I chose the name "gdbsupport" for the directory.  However, as this
patch was largely written by sed, we could pick a new name without too
much difficulty.

Tested by the buildbot.

gdb/ChangeLog
2019-07-09  Tom Tromey  <tom@tromey.com>

	* contrib/ari/gdb_ari.sh: Change common to gdbsupport.
	* configure: Rebuild.
	* configure.ac: Change common to gdbsupport.
	* gdbsupport: Rename from common.
	* acinclude.m4: Change common to gdbsupport.
	* Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES)
	(HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to
	gdbsupport.
	* aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c,
	amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c,
	amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c,
	amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c,
	amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c,
	arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c,
	arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c,
	arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c,
	arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c,
	auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h,
	btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c,
	charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c,
	cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c,
	coff-pe-read.c, command.h, compile/compile-c-support.c,
	compile/compile-c.h, compile/compile-cplus-symbols.c,
	compile/compile-cplus-types.c, compile/compile-cplus.h,
	compile/compile-loc2c.c, compile/compile.c, completer.c,
	completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c,
	cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c,
	darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c,
	disasm.h, dtrace-probe.c, dwarf-index-cache.c,
	dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c,
	dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c,
	event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c,
	features/aarch64-core.c, features/aarch64-fpu.c,
	features/aarch64-pauth.c, features/aarch64-sve.c,
	features/i386/32bit-avx.c, features/i386/32bit-avx512.c,
	features/i386/32bit-core.c, features/i386/32bit-linux.c,
	features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c,
	features/i386/32bit-segments.c, features/i386/32bit-sse.c,
	features/i386/64bit-avx.c, features/i386/64bit-avx512.c,
	features/i386/64bit-core.c, features/i386/64bit-linux.c,
	features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c,
	features/i386/64bit-segments.c, features/i386/64bit-sse.c,
	features/i386/x32-core.c, features/riscv/32bit-cpu.c,
	features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c,
	features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c,
	features/riscv/64bit-fpu.c, features/tic6x-c6xp.c,
	features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h,
	findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h,
	gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c,
	gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c,
	go32-nat.c, guile/guile.c, guile/scm-ports.c,
	guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c,
	i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c,
	i386-linux-tdep.c, i386-tdep.c, i387-tdep.c,
	ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c,
	inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h,
	inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h,
	inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c,
	linux-tdep.c, linux-thread-db.c, location.c, machoread.c,
	macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h,
	mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c,
	mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h,
	minsyms.c, mips-linux-tdep.c, namespace.h,
	nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h,
	nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c,
	nat/amd64-linux-siginfo.c, nat/fork-inferior.c,
	nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c,
	nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c,
	nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h,
	nat/linux-waitpid.c, nat/mips-linux-watch.c,
	nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c,
	nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c,
	nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h,
	obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c,
	parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c,
	procfs.c, producer.c, progspace.h, psymtab.h,
	python/py-framefilter.c, python/py-inferior.c, python/py-ref.h,
	python/py-type.c, python/python.c, record-btrace.c, record-full.c,
	record.c, record.h, regcache-dump.c, regcache.c, regcache.h,
	remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c,
	riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c,
	selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c,
	ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c,
	source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c,
	stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h,
	symtab.c, symtab.h, target-descriptions.c, target-descriptions.h,
	target-memory.c, target.c, target.h, target/waitstatus.c,
	target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c,
	top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c,
	tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h,
	unittests/array-view-selftests.c,
	unittests/child-path-selftests.c, unittests/cli-utils-selftests.c,
	unittests/common-utils-selftests.c,
	unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c,
	unittests/format_pieces-selftests.c,
	unittests/function-view-selftests.c,
	unittests/lookup_name_info-selftests.c,
	unittests/memory-map-selftests.c, unittests/memrange-selftests.c,
	unittests/mkdir-recursive-selftests.c,
	unittests/observable-selftests.c,
	unittests/offset-type-selftests.c, unittests/optional-selftests.c,
	unittests/parse-connection-spec-selftests.c,
	unittests/ptid-selftests.c, unittests/rsp-low-selftests.c,
	unittests/scoped_fd-selftests.c,
	unittests/scoped_mmap-selftests.c,
	unittests/scoped_restore-selftests.c,
	unittests/string_view-selftests.c, unittests/style-selftests.c,
	unittests/tracepoint-selftests.c, unittests/unpack-selftests.c,
	unittests/utils-selftests.c, unittests/xml-utils-selftests.c,
	utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c,
	value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c,
	xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c,
	xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport.

gdb/gdbserver/ChangeLog
2019-07-09  Tom Tromey  <tom@tromey.com>

	* configure: Rebuild.
	* configure.ac: Change common to gdbsupport.
	* acinclude.m4: Change common to gdbsupport.
	* Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS)
	(version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change
	common to gdbsupport.
	* ax.c, event-loop.c, fork-child.c, gdb_proc_service.h,
	gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c,
	inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c,
	linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c,
	linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c,
	linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h,
	nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c,
	server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h,
	thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change
	common to gdbsupport.
2019-07-09 07:45:38 -06:00
Tom Tromey
54ee425275 Avoid use-after-free in DWARF debug names code
A static analyzer pointed out that find_vec_in_debug_names will use
the contents of a unique_ptr after it has been destroyed.  This patch
fixes the bug by hoisting the declaration into the appropriate
enclosing block.

I'm checking this in as obvious.

gdb/ChangeLog
2019-07-01  Tom Tromey  <tromey@adacore.com>

	* dwarf2read.c
	(dw2_debug_names_iterator::find_vec_in_debug_names): Hoist
	declaration of without_params.  Fix formatting.
2019-07-01 09:36:30 -06:00
Tom Tromey
10d06d8219 Handle either order of name and linkage name
We discovered that the Ada support in gdb depends on the order of the
DW_AT_name and DW_AT_linkage_name attributes in the DWARF.  In
particular, if they are emitted in the "wrong" order for some system
symbols, "catch exception" will not work.

This patch fixes this problem by arranging to always prefer the
linkage name if both exist.  This seems to be what the full symbol
reader already does -- that is, this is another bug arising from
having two different DWARF readers.

Another possible issue here is that gdb still doesn't really preserve
mangled names properly.  There's a PR open about this.  However, this
seems to be somewhat involved to fix, which is why this patch
continues to work around the bigger issue.

gdb/ChangeLog
2019-06-28  Tom Tromey  <tromey@adacore.com>

	* dwarf2read.c (partial_die_info::read): Prefer the linkage name
	for Ada.

gdb/testsuite/ChangeLog
2019-06-28  Tom Tromey  <tromey@adacore.com>

	* gdb.dwarf2/ada-linkage-name.c: New file.
	* gdb.dwarf2/ada-linkage-name.exp: New file.
2019-06-28 08:37:38 -06:00
Tom de Vries
47e3f47487 [gdb] Fix s390x -m31 build
When building gdb on s390x with -m31, we run into this Wformat
warning (which Werror turns into an error):
...
gdb/dwarf2read.c: In function \
  'void create_addrmap_from_aranges(dwarf2_per_objfile*, \
                                    dwarf2_section_info*)':
gdb/dwarf2read.c:3277:22: error: format '%zu' expects argument of type \
  'size_t', but argument 3 has type 'int' [-Werror=format=]
    warning (_("Section .debug_aranges in %s entry at offset %zu "
...

The Wformat warning is triggered in this statement:
...
          warning (_("Section .debug_aranges in %s entry at offset %zu "
                     "length %s exceeds section length %s, "
                     "ignoring .debug_aranges."),
                   objfile_name (objfile), entry_addr - section->buffer,
                   plongest (bytes_read + entry_length),
                   pulongest (section->size));
...
where 'entry_addr - section->buffer' is of type ptrdiff_t and '%zu' prints an
unsigned with the same size as size_t/ssize_t.

On s390x with -m31, we have:
- size_t   : unsigned long int (32-bit)
- ptrdiff_t: int               (32-bit)

Wformat warns against this because even though long int and int have the same
size, the types are not compatible.

[ The Wformat warning is to similar to what we would get for x86_64 -m32
(where long and int are also the same size) and:
...
int i;
printf ("%ld", i);
... ]

Fix this by using '%s' and plongest instead of '%zu' to print ptrdiff_t.

Build and reg-tested on x86_64.

gdb/ChangeLog:

2019-06-22  Tom de Vries  <tdevries@suse.de>

	* dwarf2read.c (create_addrmap_from_aranges)
	(read_debug_names_from_section): Print ptrdiff_t using '%s' and plongest
	instead of '%zu'.
2019-06-22 10:59:37 +02:00
Simon Marchi
fd5866f6aa dwarf2read: Get rid of VEC (dwarf2_section_info_def)
This patch removes uses of VEC (dwarf2_section_info_def) in favor of
std::vector<dwarf2_section_info>.  The conversion is relatively
straightforward, no function changes are intended.

gdb/ChangeLog:

	* dwarf2read.h (dwarf2_section_info_def): Remove.
	(DEF_VEC_O (dwarf2_section_info_def)): Remove.
	* dwarf2read.c (struct dwo_sections) <types>: Change type to
	std::vector<dwarf2_section_info>.
	(struct dwo_file) <~dwo_file>: Remove.
	(dwarf2_per_objfile::~dwarf2_per_objfile): Don't manually free
	types field.
	(dwarf2_per_objfile::locate_sections): Adjust to std::vector.
	(dwarf2_read_debug_names): Likewise.
	(create_debug_types_hash_table): Change parameter type to
	array_view, adjust code accordingly.
	(dwarf2_locate_dwo_sections): Adjust to std::vector.
	(partial_die_info::fixup): Likewise.
	(determine_prefix): Likewise.
	* dwarf-index-write.c (write_psymtabs_to_index): Adjust.
2019-06-21 14:11:15 -04:00
Simon Marchi
fb1eb2f94a dwarf2read: Make dwo_file::dbfd a gdb_bfd_ref_ptr
This removes the manual call to gdb_bfd_ref in favor of gdb_bfd_ref_ptr.

gdb/ChangeLog:

	* dwarf2read.c (struct dwo_file) <dbfd>: Change type to
	gdb_bfd_ref_ptr.
	<~dwo_file>: Remove call to gdb_bfd_unref.
	(open_and_init_dwo_file): Move gdb_bfd_ref_ptr into dbfd field. Call
	gdb_bfd_ref_ptr::get.
2019-06-21 14:11:13 -04:00
Simon Marchi
51ac9db596 dwarf2read: C++ify dwo_file
This patch changes dwo_file to be allocated/deallocated with new/delete,
so that we can start using C++ features in it, and in struct
dwo_sections.

The free_dwo_file function becomes the destructor of struct dwo_file
(and will disappear in upcoming patches, which will use gdb_bfd_ref_ptr
for dbfd and an std::vector for sections.types).

gdb/ChangeLog:

	* dwarf2read.h (struct dwarf2_per_objfile) <dwo_files>: Change
	type to htab_up.
	* dwarf2read.c (struct dwo_file): Initialize fields.
	<~dwo_file>: New.
	(free_dwo_file): Remove, move content to ~dwo_file.
	(struct dwo_file_deleter): Remove.
	(dwo_file_up>: Remove custom deleter.
	(free_dwo_files): Remove.
	(dwarf2_per_objfile::~dwarf2_per_objfile): Don't explicitly free
	dwo_files.
	(process_skeletonless_type_units): Call unique_ptr::get.
	(allocate_dwo_file_hash_table): Add deleter to created hash
	table.  Change return type to htab_up.
	(lookup_dwo_file_slot): Don't memset dwo_file, call
	unique_ptr::get.
	(create_dwo_unit_in_dwp_v1): Allocate dwo_file with new.
	(create_dwo_unit_in_dwp_v2): Likewise.
	(open_and_init_dwo_file): Likewise.
	(free_dwo_file_from_slot): Remove.
2019-06-21 14:10:14 -04:00
Simon Marchi
dc4ccb6f7f dwarf2read: Use bool for dwarf2_section_info fields
Use bool instead of char where applicable in dwarf2_section_info.

No functional changes intended.

gdb/ChangeLog:

	* dwarf2read.h (struct dwarf2_section_info) <readin,
	is_virtual>: Change type to bool.
	* dwarf2read.c (dwarf2_read_section, create_dwp_v2_section): Use
	true instead of 1.
2019-06-21 14:10:13 -04:00
Tom de Vries
3360b6e796 [gdb] Fix abstract_to_concrete type
The test-case varval.exp fails here:
...
FAIL: gdb.dwarf2/varval.exp: print varval2
...
with boards readnow/cc-with-gdb-index/cc-with-debug-names, as well as if gdb
is build with -fsanitize=address -lasan.

The problem is that the abstract_to_concrete map in which we track the
association of abstract to concrete DIEs (for DW_OP_GNU_variable_value
support) has type std::unordered_map<die_info_ptr, std::vector<die_info_ptr>>,
and the die_info_ptrs that we register in the map may be invalid by the time
that we start to lookup DIEs in the map.

Fix this by using the sect_offset instead to identify the DIEs in the map.

Build and tested on x86_64-linux.

gdb/ChangeLog:

2019-06-18  Tom de Vries  <tdevries@suse.de>

	PR gdb/24515
	* dwarf2read.h (abstract_to_concrete): Change type from
	std::unordered_map<die_info_ptr, std::vector<die_info_ptr>> to
	std::unordered_map<sect_offset, std::vector<sect_offset>>.
	* dwarf2read.c (read_variable): Update.
	(dwarf2_fetch_die_loc_sect_off): Update.
2019-06-18 18:59:51 +02:00
Simon Marchi
c497330687 Write index for dwz -m file
PR 24445 ("dwz multifile index not written to index cache") exposed the
fact that we are not doing things right when we generate an index for an
object file that has is linked to a dwz file.  The same happens whether
the index is generated with the intent of populating the index cache or
using the save gdb-index command.

The problem can be observed when running these tests with the
cc-with-dwz-m board:

    FAIL: gdb.base/index-cache.exp: test_cache_enabled_hit: check index-cache stats
    FAIL: gdb.dwarf2/gdb-index.exp: index used
    FAIL: gdb.dwarf2/gdb-index.exp: index used after symbol reloading

When generating the index for such file and inspecting the CU list of the
resulting index (with readelf --debug-dump=gdb_index), we can see something
like:

    CU table:
    [  0] 0x0 - 0xb9
    [  1] 0x0 - 0x44

This is supposed to be a sorted list of the ranges of all CUs in the
file this index represents, so already having some overlap is a red
flag.  It turns out that we save the ranges of CUs coming from both the
main file and the dwz file in the same index.

After digging a little bit, it became quite obvious that the index in
the main file should only list the CUs present in the main file, and a
separate index should be generated for the dwz file, listing the CUs
present in that file.

First, that's what happens if you run dwz on a file that already has a
GDB index embedded.  Second, dwarf2read.c has code to read an index from
a dwz file.  The index in the dwz file is actually required to be
present, if the main file has an index.

So this patch changes write_psymtabs_to_index to generate an index for
the dwz file, if present.  That index only contains a CU list, just like
what the dwz tool does when processing a file that already contains an
index.

Some notes about the implementation:

- The file management (creating a temp file, make sure it's
  close/removed on error - in the right order) is a bit heavy in
  write_psymtabs_to_index, and I needed to add a third file.  I factored
  this pattern in a separate class, index_wip_file.
- It became a bit tedious to keep the call to assert_file_size in
  write_psymtabs_to_index, write_gdbindex would have had to return two
  sizes.  Instead, I moved the calls to assert_file_size where the file
  is written.  The downside is that we lose the filename at this point,
  but it was only used for the very improbable case of ftell failing, so
  I think it's not a problem.
- The actual writing of the index file is factored out to
  write_gdbindex_1, so it can be re-used for both index files.
- While the "save gdb-index" command will now write two .gdb-index
  files, this patch does not update the gdb-add-index.sh script, this
  will come in a later patch.

gdb/ChangeLog:

YYYY-MM-DD  Simon Marchi  <simon.marchi@efficios.com>

	PR gdb/24445
	* dwarf-index-write.h (write_psymtabs_to_index): Add
	dwz_basename parameter.
	* dwarf-index-write.c (write_gdbindex): Move file writing to
	write_gdbindex_1.  Change return type void.
	(assert_file_size): Move up, remove filename parameter.
	(write_gdbindex_1): New function.
	(write_debug_names): Change return type to void, call
	assert_file_size.
	(struct index_wip_file): New struct.
	(write_psymtabs_to_index): Add dwz_basename parameter.  Move
	file logic to index_wip_file.  Write index for dwz file if
	needed.
	(save_gdb_index_command): Pass basename of dwz file, if present.
	* dwarf-index-cache.c (index_cache::store): Obtain and pass
	build-id of dwz file, if present.
	* dwarf2read.c (struct dwz_file): Move to dwarf2read.h.
	(dwarf2_get_dwz_file): Likewise.
	* dwarf2read.h (struct dwz_file): Move from dwarf2read.c.
	(dwarf2_get_dwz_file): Likewise.

gdb/testsuite/ChangeLog:

YYYY-MM-DD  Tom de Vries  <tdevries@suse.de>

	PR gdb/24445
	* gdb.dwarf2/gdb-index.exp (add_gdb_index): Update dwz file with
	generated index.
2019-06-16 13:24:12 -04:00
Bernhard Heckel
a5fd13a915 Dwarf: Don't add nameless modules to partial symbol table
A name for BLOCK DATA in Fortran is optional.  If no name has been
assigned, GDB crashes during read-in of DWARF when BLOCK DATA is
represented via DW_TAG_module.  BLOCK DATA is used for one-time
initialization of non-pointer variables in named common blocks.

As of now there is no issue when gfortran is used as DW_TAG_module is
not emitted.  However, with Intel ifort the nameless DW_TAG_module is
present and has the following form:

 ...
  <1><dd>: Abbrev Number: 7 (DW_TAG_module)
     <de>   DW_AT_decl_line   : 46
     <df>   DW_AT_decl_file   : 1
     <e0>   DW_AT_description : (indirect string, offset: 0x110): block
 data
     <e4>   DW_AT_high_pc     : 0x402bb7
     <ec>   DW_AT_low_pc      : 0x402bb7
 ...

The missing name leads to a crash in add_partial_symbol, during length
calculation.

gdb/ChangeLog:
2019-06-11  Bernhard Heckel  <bernhard.heckel@intel.com>

	* dwarf2read.c (add_partial_symbol): Skip nameless modules.

gdb/testsuite/Changelog:
2019-06-11  Bernhard Heckel  <bernhard.heckel@intel.com>

	* gdb.fortran/block-data.f: New.
	* gdb.fortran/block-data.exp: New.
2019-06-11 19:20:09 +01:00
Tom de Vries
9ab084121f [gdb] Fix heap-buffer-overflow in cp_find_first_component_aux
When compiling gdb with '-lasan -fsanitizer=address' and running tests with:
- export ASAN_OPTIONS="detect_leaks=0:alloc_dealloc_mismatch=0",
- target board cc-with-gdb-index,
- the "[gdb/testsuite] Fix gdb.base/break-probes.exp with native-gdbserver"
  commit reverted to avoid running into PR24617,
we get with gdb.arch/amd64-init-x87-values.exp:
...
==31229==ERROR: AddressSanitizer: heap-buffer-overflow on address \
  0x62500098c93c at pc 0x000000bcc748 bp 0x7ffe39487660 sp 0x7ffe39487658
READ of size 1 at 0x62500098c93c thread T0
    #0 0xbcc747 in cp_find_first_component_aux src/gdb/cp-support.c:999
    #1 0xbcc6e9 in cp_find_first_component(char const*) \
                   src/gdb/cp-support.c:977
    #2 0xcc2cf3 in mapped_index_base::build_name_components() \
                   src/gdb/dwarf2read.c:4499
    #3 0xcc3322 in dw2_expand_symtabs_matching_symbol src/gdb/dwarf2read.c:4552
    #4 0xcc817f in dw2_expand_symtabs_matching src/gdb/dwarf2read.c:5228
    #5 0xfe8f48 in iterate_over_all_matching_symtabs src/gdb/linespec.c:1147
    #6 0x1003506 in add_matching_symbols_to_info src/gdb/linespec.c:4413
    #7 0xffe21b in find_function_symbols src/gdb/linespec.c:3886
    #8 0xffe4a2 in find_linespec_symbols src/gdb/linespec.c:3914
    #9 0xfee3ad in linespec_parse_basic src/gdb/linespec.c:1865
    #10 0xff5128 in parse_linespec src/gdb/linespec.c:2655
    #11 0xff8872 in event_location_to_sals src/gdb/linespec.c:3150
    #12 0xff90a8 in decode_line_full(event_location const*, int, \
                    program_space*, symtab*, int, linespec_result*, \
		    char const*, char const*) src/gdb/linespec.c:3230
    #13 0x9ce449 in parse_breakpoint_sals src/gdb/breakpoint.c:9057
    #14 0x9ea022 in create_sals_from_location_default src/gdb/breakpoint.c:13708
    #15 0x9e2c1f in bkpt_create_sals_from_location src/gdb/breakpoint.c:12514
    #16 0x9cff06 in create_breakpoint(gdbarch*, event_location const*, \
                    char const*, int, char const*, int, int, bptype, int, \
		    auto_boolean, breakpoint_ops const*, int, int, int, \
		    unsigned int) src/gdb/breakpoint.c:9238
    #17 0x9d114a in break_command_1 src/gdb/breakpoint.c:9402
    #18 0x9d1b60 in break_command(char const*, int) src/gdb/breakpoint.c:9473
    #19 0xac96aa in do_const_cfunc src/gdb/cli/cli-decode.c:106
    #20 0xad0e5a in cmd_func(cmd_list_element*, char const*, int) \
                    src/gdb/cli/cli-decode.c:1892
    #21 0x15226f6 in execute_command(char const*, int) src/gdb/top.c:630
    #22 0xddde37 in command_handler(char const*) src/gdb/event-top.c:586
    #23 0xdde7c1 in command_line_handler(std::unique_ptr<char, \
                    gdb::xfree_deleter<char> >&&) src/gdb/event-top.c:773
    #24 0xddc9e8 in gdb_rl_callback_handler src/gdb/event-top.c:217
    #25 0x16f2198 in rl_callback_read_char src/readline/callback.c:220
    #26 0xddc5a1 in gdb_rl_callback_read_char_wrapper_noexcept \
                    src/gdb/event-top.c:175
    #27 0xddc773 in gdb_rl_callback_read_char_wrapper src/gdb/event-top.c:192
    #28 0xddd9f5 in stdin_event_handler(int, void*) src/gdb/event-top.c:514
    #29 0xdd7d8f in handle_file_event src/gdb/event-loop.c:731
    #30 0xdd8607 in gdb_wait_for_event src/gdb/event-loop.c:857
    #31 0xdd629c in gdb_do_one_event() src/gdb/event-loop.c:321
    #32 0xdd6344 in start_event_loop() src/gdb/event-loop.c:370
    #33 0x10a7715 in captured_command_loop src/gdb/main.c:331
    #34 0x10aa548 in captured_main src/gdb/main.c:1173
    #35 0x10aa5d8 in gdb_main(captured_main_args*) src/gdb/main.c:1188
    #36 0x87bd35 in main src/gdb/gdb.c:32
    #37 0x7f16e1434f89 in __libc_start_main (/lib64/libc.so.6+0x20f89)
    #38 0x87bb49 in _start (build/gdb/gdb+0x87bb49)

0x62500098c93c is located 0 bytes to the right of 8252-byte region \
  [0x62500098a900,0x62500098c93c)
allocated by thread T0 here:
    #0 0x7f16e359a600 in malloc (/usr/lib64/libasan.so.5+0xeb600)
    #1 0x1742ddf in bfd_malloc src/bfd/libbfd.c:275
    #2 0x1738824 in bfd_get_full_section_contents src/bfd/compress.c:253
    #3 0xe30044 in gdb_bfd_map_section(bfd_section*, unsigned long*) \
                   src/gdb/gdb_bfd.c:704
    #4 0xcb56bf in dwarf2_read_section(objfile*, dwarf2_section_info*) \
                   src/gdb/dwarf2read.c:2539
    #5 0xd5bcd0 in get_gdb_index_contents_from_section<dwarf2_per_objfile> \
                   src/gdb/dwarf2read.c:6217
    #6 0xd7fc7d in gdb::function_view<gdb::array_view<unsigned char const> \
                   (...) const src/gdb/common/function-view.h:284
    #7 0xd7fddd in gdb::function_view<gdb::array_view<unsigned char const> \
                   (...) src/gdb/common/function-view.h:278
    #8 0xd730cf in gdb::function_view<gdb::array_view<unsigned char const> \
                   (...) const src/gdb/common/function-view.h:247
    #9 0xcbc7ee in dwarf2_read_gdb_index src/gdb/dwarf2read.c:3582
    #10 0xcce731 in dwarf2_initialize_objfile(objfile*, dw_index_kind*) \
                    src/gdb/dwarf2read.c:6297
    #11 0xdb88c4 in elf_symfile_read src/gdb/elfread.c:1256
    #12 0x141262a in read_symbols src/gdb/symfile.c:798
    #13 0x14140a7 in syms_from_objfile_1 src/gdb/symfile.c:1000
    #14 0x1414393 in syms_from_objfile src/gdb/symfile.c:1017
    #15 0x1414fb7 in symbol_file_add_with_addrs src/gdb/symfile.c:1124
    #16 0x14159b7 in symbol_file_add_from_bfd(bfd*, char const*, \
                     enum_flags<symfile_add_flag>, std::vector<other_sections, \
	             std::allocator<other_sections> >*, \
		     enum_flags<objfile_flag>, objfile*) src/gdb/symfile.c:1203
    #17 0x1415b6c in symbol_file_add(char const*,
                     enum_flags<symfile_add_flag>, std::vector<other_sections, \
		     std::allocator<other_sections> >*, \
		     enum_flags<objfile_flag>) src/gdb/symfile.c:1216
    #18 0x1415f2f in symbol_file_add_main_1 src/gdb/symfile.c:1240
    #19 0x1418599 in symbol_file_command(char const*, int) \
                     src/gdb/symfile.c:1675
    #20 0xde2fa6 in file_command src/gdb/exec.c:433
    #21 0xac96aa in do_const_cfunc src/gdb/cli/cli-decode.c:106
    #22 0xad0e5a in cmd_func(cmd_list_element*, char const*, int) \
                    src/gdb/cli/cli-decode.c:1892
    #23 0x15226f6 in execute_command(char const*, int) src/gdb/top.c:630
    #24 0xddde37 in command_handler(char const*) src/gdb/event-top.c:586
    #25 0xdde7c1 in command_line_handler(std::unique_ptr<char, \
                    gdb::xfree_deleter<char> >&&) src/gdb/event-top.c:773
    #26 0xddc9e8 in gdb_rl_callback_handler src/gdb/event-top.c:217
    #27 0x16f2198 in rl_callback_read_char src/readline/callback.c:220
    #28 0xddc5a1 in gdb_rl_callback_read_char_wrapper_noexcept \
                    src/gdb/event-top.c:175
    #29 0xddc773 in gdb_rl_callback_read_char_wrapper src/gdb/event-top.c:192

SUMMARY: AddressSanitizer: heap-buffer-overflow src/gdb/cp-support.c:999 in \
  cp_find_first_component_aux
Shadow bytes around the buggy address:
  0x0c4a801298d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a801298e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a801298f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a80129900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c4a80129910: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c4a80129920: 00 00 00 00 00 00 00[04]fa fa fa fa fa fa fa fa
  0x0c4a80129930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a80129940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a80129950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a80129960: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c4a80129970: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==31229==ABORTING
...

The problem happens as follows.

The executable amd64-init-x87-values gets an index (due to target board
cc-with-gdb-index), which looks as follows:
...
Hex dump of section '.gdb_index':
  0x00000000 08000000 18000000 28000000 28000000 ........(...(...
  0x00000010 3c000000 3c200000 00000000 00000000 <...< ..........
  0x00000020 2e000000 00000000 d4004000 00000000 ..........@.....
  0x00000030 db004000 00000000 00000000 00000000 ..@.............
  0x00000040 00000000 00000000 00000000 00000000 ................
  0x00000050 00000000 00000000 00000000 00000000 ................
  ... more zeroes ...
  0x00002010 00000000 00000000 00000000 00000000 ................
  0x00002020 00000000 00000000 00000000 00000000 ................
  0x00002030 00000000 00000000 00000000          ............
...

The structure of this index is:
...
header       : [0x0, 0x18)     : size 0x18
culist       : [0x18 ,0x28)    : size 0x10
typesculist  : [0x28, 0x28)    : size 0x0
adress area  : [0x28, 0x3c)    : size 0x14
symbol table : [0x3c, 0x203c)  : size 0x2000
constant pool: [0x203c, 0x203c): size 0x0
EOF          : 0x203c
...

Note that the symbol table consists entirely of empty slots (where an empty
slot is a pair of 32-bit zeroes), and that the constant pool is empty.

The problem happens here in mapped_index_base::build_name_components:
...
  auto count = this->symbol_name_count ();
  for (offset_type idx = 0; idx < count; idx++)
    {
      if (this->symbol_name_slot_invalid (idx))
	continue;

      const char *name = this->symbol_name_at (idx);
...
when accessing the slot at idx == 0 in the symbol table,
symbol_name_slot_invalid returns false so we calculate name, which is
calculated using 'constant_pool + symbol_table[idx].name', which means we get
name == constant_pool.  And given that the constant pool is empty, name now
points past the memory allocated for the index, and when we access name[0] for
the first time in cp_find_first_component_aux, we run into the
heap-buffer-overflow.

Fix this by fixing the definition of symbol_name_slot_invalid:
...
-    return bucket.name == 0 && bucket.vec;
+    return bucket.name == 0 && bucket.vec == 0;
...

Tested on x86_64-linux.

gdb/ChangeLog:

2019-06-10  Tom de Vries  <tdevries@suse.de>

	PR gdb/24618
	* dwarf2read.c (struct mapped_index::symbol_name_slot_invalid): Make
	sure an empty slot (defined by a 32-bit zero pair) is recognized as
	invalid.
2019-06-10 20:27:09 +02:00
Tom de Vries
81873cc81e [gdb/symtab] Support DW_AT_main_subprogram with -readnow.
DW_AT_main_subprogram is supported in normal mode in read_partial_die, but not
in -readnow mode.

Fix this by adding support for DW_AT_main_subprogram in read_func_scope.

Tested on x86_64-linux with native and RFC target board readnow (
https://sourceware.org/ml/gdb-patches/2019-05/msg00073.html ).

gdb/ChangeLog:

2019-06-10  Tom de Vries  <tdevries@suse.de>

	PR symtab/16264
	PR symtab/24517
	* dwarf2read.c (read_func_scope): Handle DW_AT_main_subprogram.
2019-06-10 09:28:30 +02:00