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Simon Marchi 8b8f98ad2b gdbsupport/intrusive-list: add owning_intrusive_list 
It occured to me that `intrusive_list<solib>`, as returned by
`solib_ops::current_sos`, for instance, is not very safe.  The
current_sos method returns the ownership of the solib objects
(heap-allocated) to its caller, but the `intrusive_list<solib>` type
does not convey it.  If a function is building an
`intrusive_list<solib>` and something throws, the solibs won't
automatically be deleted.  Introduce owning_intrusive_list to fill this
gap.

Interface
---------

The interface of owning_intrusive_list is mostly equivalent to
intrusive_list, with the following differences:

 - When destroyed, owning_intrusive_list deletes all element objects.
   The clear method does so as well.

 - The erase method destroys the removed object.

 - The push_front, push_back and insert methods accept a `unique_ptr<T>`
   (compared to `T &` for intrusive_list), taking ownership of the
   object.

 - owning_intrusive_list has emplace_front, emplace_back and emplace
   methods, allowing to allocate and construct an object directly in the
   list.  This is really just a shorthand over std::make_unique and
   insert (or push_back / push_front if you don't care about the return
   value), but I think it is nicer to read:

     list.emplace (pos, "hello", 2);

   rather than

     list.insert (pos, std::make_unique<Foo> ("hello", 2));

   These methods are not `noexcept`, since the allocation or the
   constructor could throw.

 - owning_intrusive_list has a release method, allowing to remove an
   element without destroying it.  The release method returns a
   pair-like struct with an iterator to the next element in the list
   (like the erase method) and a unique pointer transferring the
   ownership of the released element to the caller.

 - owning_intrusive_list does not have a clear_and_dispose method, since
   that is typically used to manually free items.

Implementation
--------------

owning_intrusive_list privately inherits from intrusive_list, in order
to re-use the linked list machinery.  It adds ownership semantics around
it.

Testing
-------

Because of the subtle differences in the behavior in behavior and what
we want to test for each type of intrusive list, I didn't see how to
share the tests for the two implementations.  I chose to copy the
intrusive_list tests and adjust them for owning_intrusive_list.

The verify_items function was made common though, and it tries to
dereference the items in the list, to make sure they have not been
deleted by mistake (which would be caught by Valgrind / ASan).

Change-Id: Idbde09c1417b79992a0a9534d6907433e706f760
Co-Authored-By: Pedro Alves <pedro@palves.net>
Reviewed-by: Keith Seitz <keiths@redhat.com>
2024-09-13 07:38:56 -04:00
..
.dir-locals.el Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
.gitattributes
acinclude.m4 gdb: move libiberty.m4 to gdbsupport 2024-01-10 19:52:52 -05:00
aclocal.m4 Finalized intl-update patches 2023-11-15 12:53:04 +00:00
agent.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
agent.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
alt-stack.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
array-view.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
ax.def Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
block-signals.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
break-common.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
btrace-common.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
btrace-common.h btrace, gdbserver: Add ptwrite to btrace_config_pt. 2024-08-14 11:20:56 +02:00
buildargv.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
byte-vector.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
ChangeLog-2020-2021
check-defines.el gdbsupport: assume that compiler supports std::{is_trivially_constructible,is_trivially_copyable} 2024-02-21 13:30:19 -05:00
cleanups.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
cleanups.h Rewrite final cleanups 2024-02-27 10:30:29 -07:00
common-debug.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
common-debug.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
common-defs.h gdb: remove some GCC version checks 2024-02-21 13:30:17 -05:00
common-exceptions.cc gdb, gdbserver, gdbsupport: use [[noreturn]] instead of ATTRIBUTE_NORETURN 2024-07-16 18:30:45 -04:00
common-exceptions.h gdb, gdbserver, gdbsupport: use [[noreturn]] instead of ATTRIBUTE_NORETURN 2024-07-16 18:30:45 -04:00
common-gdbthread.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
common-inferior.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
common-inferior.h gdb: remove get_exec_file 2024-06-07 23:09:03 -04:00
common-regcache.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
common-regcache.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
common-types.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
common-utils.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
common-utils.h gdb: add another overload of startswith 2024-09-07 21:48:34 +01:00
common.m4 btrace, python: Enable ptwrite filter registration. 2024-08-14 11:20:57 +02:00
compiler-type.m4 Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
config.in btrace, python: Enable ptwrite filter registration. 2024-08-14 11:20:57 +02:00
configure btrace, python: Enable ptwrite filter registration. 2024-08-14 11:20:57 +02:00
configure.ac autoupdate: add square brackets around arguments of AC_INIT 2024-06-10 08:25:56 +09:30
create-version.sh Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
def-vector.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
default-init-alloc.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
eintr.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
enum-flags.h gdb, gdbsupport: use using in enum flags code 2024-08-12 10:58:49 -04:00
environ.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
environ.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
errors.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
errors.h gdb, gdbserver, gdbsupport: use [[noreturn]] instead of ATTRIBUTE_NORETURN 2024-07-16 18:30:45 -04:00
event-loop.cc Use std::vector in event-loop.cc 2024-04-21 19:54:27 -06:00
event-loop.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
event-pipe.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
event-pipe.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
fileio.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
fileio.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
filestuff.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
filestuff.h Introduce read_remainder_of_file 2024-02-27 09:46:31 -07:00
filtered-iterator.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
format.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
format.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
forward-scope-exit.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
function-view.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_assert.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_binary_search.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_file.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_locale.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_obstack.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb_obstack.h Require trivial destructor in allocate_on_obstack 2024-03-21 12:21:24 -06:00
gdb_proc_service.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_ref_ptr.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_regex.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb_regex.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_select.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_setjmp.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_signals.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_splay_tree.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_sys_time.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_tilde_expand.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb_tilde_expand.h gdb: add overloads of gdb_tilde_expand 2024-06-27 15:15:26 +01:00
gdb_unique_ptr.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_unlinker.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_vecs.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb_vecs.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb_wait.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb_wait.h [gdb/build] Fix build on postmarketos 2024-03-14 21:28:44 +01:00
gdb-checked-static-cast.h gdbsupport: rename include guard in gdb-checked-static-cast.h 2024-03-19 14:41:51 +00:00
gdb-dlfcn.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
gdb-dlfcn.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb-hashtab.h Remove hashtab_obstack_allocate 2024-06-24 09:11:30 -06:00
gdb-safe-ctype.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb-sigmask.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
gdb-xfree.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
hash_enum.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
host-defs.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
intrusive_list.h gdbsupport/intrusive-list: add owning_intrusive_list 2024-09-13 07:38:56 -04:00
iterator-range.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
job-control.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
job-control.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
libiberty.m4 Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
Makefile.am Remove hashtab_obstack_allocate 2024-06-24 09:11:30 -06:00
Makefile.in Remove hashtab_obstack_allocate 2024-06-24 09:11:30 -06:00
netstuff.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
netstuff.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
new-op.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
next-iterator.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
observable.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
offset-type.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
owning_intrusive_list.h gdbsupport/intrusive-list: add owning_intrusive_list 2024-09-13 07:38:56 -04:00
packed.h gdbsupport: assume that compiler supports std::{is_trivially_constructible,is_trivially_copyable} 2024-02-21 13:30:19 -05:00
parallel-for.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
pathstuff.cc gdb: avoid '//' in filenames when searching for debuginfo 2024-08-19 15:02:56 +01:00
pathstuff.h gdb: avoid '//' in filenames when searching for debuginfo 2024-08-19 15:02:56 +01:00
poison.h gdbsupport: assume that compiler supports std::{is_trivially_constructible,is_trivially_copyable} 2024-02-21 13:30:19 -05:00
preprocessor.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
print-utils.cc gdbsupport: constify some return values in print-utils.{h,cc} 2024-04-18 10:31:54 -04:00
print-utils.h gdbsupport: constify some return values in print-utils.{h,cc} 2024-04-18 10:31:54 -04:00
ptid.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
ptid.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
ptrace.m4 Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
range-chain.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
README
refcounted-object.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
reference-to-pointer-iterator.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
rsp-low.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
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run-time-clock.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
run-time-clock.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
safe-iterator.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
safe-strerror.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
scope-exit.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
scoped_fd.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
scoped_ignore_signal.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
scoped_ignore_sigttou.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
scoped_mmap.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
scoped_mmap.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
scoped_restore.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
search.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
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selftest.m4 Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
signals-state-save-restore.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
signals-state-save-restore.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
signals.cc gdbsupport: remove #ifndef REALTIME_LO in signals.cc 2024-08-12 10:21:15 -04:00
symbol.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
task-group.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
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tdesc.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
tdesc.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
thread-pool.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
thread-pool.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
traits.h gdb: move RequireLongest to gdbsupport/traits.h 2024-04-22 21:34:19 -04:00
underlying.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
valid-expr.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
version.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00
warning.m4 gdb, gdbserver, gdbsupport: remove -Wno-vla-cxx-extension 2024-08-02 16:54:52 -04:00
x86-xstate.h gdb/gdbserver: share I386_LINUX_XSAVE_XCR0_OFFSET definition 2024-06-14 09:08:44 +01:00
xml-utils.cc gdb, gdbserver, gdbsupport: remove includes of early headers 2024-03-26 21:13:22 -04:00
xml-utils.h Update copyright year range in header of all files managed by GDB 2024-01-12 15:49:57 +00:00

README 

This is a helper library that is used by gdb and gdbserver.

To send patches, follow the gdb patch submission instructions in
../gdb/CONTRIBUTE.  For maintainers, see ../gdb/MAINTAINERS.