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* src/eval.c (internal_lisp_condition_case): Don't take XCAR
without making sure the value is a cons cell. (Bug#48479)
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Allow a condition-case handler on the form (:success BODY) to be
specified as the success continuation of the protected form, with
the specified variable bound to its result.
* src/eval.c (Fcondition_case): Update the doc string.
(internal_lisp_condition_case): Implement in interpreter.
(syms_of_eval): Defsym :success.
* lisp/emacs-lisp/bytecomp.el (byte-compile-condition-case):
Implement in byte-compiler.
* lisp/emacs-lisp/cl-macs.el (cl--self-tco): Allow self-TCO
from success handler.
* doc/lispref/control.texi (Handling Errors): Update manual.
* etc/NEWS: Announce.
* test/lisp/emacs-lisp/bytecomp-tests.el (bytecomp-tests--test-cases)
(bytecomp-condition-case-success):
* test/lisp/emacs-lisp/cl-macs-tests.el (cl-macs--labels):
Add test cases.
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Further testing seems to confirm my suspicion that the increase in the
specpdl comes from the recent change to `pcase--if`.
* lisp/international/mule-cmds.el (update-leim-list-file): Revert workaround.
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* doc/lispref/commands.texi (Using Interactive): Document the
extended `interactive' form.
* doc/lispref/loading.texi (Autoload): Document list-of-modes
form.
* lisp/emacs-lisp/autoload.el (make-autoload): Pick the list of
modes from `interactive' out of the functions.
* lisp/emacs-lisp/bytecomp.el (byte-compile-lambda): Allow for the
extended `interactive' form.
* src/callint.c (Finteractive): Document the extended form.
* src/data.c (Finteractive_form): Return the interactive form in
the old format (even when there's an extended `interactive') to
avoid having other parts of Emacs be aware of this.
(Fcommand_modes): New defun.
* src/emacs-module.c (GCALIGNED_STRUCT): Allow for modules to
return command modes.
* src/lisp.h: New function module_function_command_modes.
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* lisp/minibuffer.el (exit-minibuffer): When in a minibuffer, throw an error
should the command loop nesting level be wrong.
* src/lisp.h (minibuffer_quit_level): declare as an extern.
(command_loop_level): Move definition from src/window.h
* src/window.h (command_loop_level): move definition to src/lisp.h.
* src/eval.c (minibuffer_quit_level): Move this variable to file level from
being a static inside internal_catch.
(internal_catch): Simplify the logic.
* src/minibuf.c (Vcommand_loop_level_list): New variable.
(move_minibuffer_onto_frame): Set the major mode of *Minibuf-0*.
(Fminibuffer_innermost_command_loop_p): New primitive.
(Fabort_minibuffers): Check the command loop level before throwing t to 'exit,
and set minibuffer_quit_level too.
(read_minibuf): New variable calling_window.
Before stacking up minibuffers on the current mini-window, check that the
mini-window is not the current one.
Do not call choose_minibuf_frame from read_minibuf's unwinding process.
Bind calling_frame and calling_window over the recursive edit.
Set the new minibuffer's major mode directly.
Remove the switching away from the minibuffer after the recursive edit.
(get_minibuffer): Record the command loop level in new variable
Vcommand_loop_level_list. No longer set the major mode of a returned
minibuffer.
(minibuf_c_loop_level): New function.
(read_minibuf_unwind): New variables calling_frame, calling_window are unbound
from the binding stack. Remove old variable `window', which could not be set
reliably to the expired mini-window.
The expired minibuffer is determined as the nth in the list, rather than the
contents of the current or previous mini-window.
Switch the current window away from the mini-window here (moved from
read_minibuf).
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* src/data.c (Fmake_variable_buffer_local):
* src/eval.c (Fdefvar): Add cross-references to 'defvar-local'.
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In particular, add a new value to the variable, and fix several bugs apparent
with the implementation up till now.
* doc/emacs/mini.texi (Basic Minibuffer): Add a description of the new
non-nil, non-t value of minibuffer-follows-selected-frame.
* doc/emacs/trouble.texi (Quitting): Add a description of how C-g handles
recursive minibuffers when typed in one which isn't the most nested.
* doc/lispref/minibuf.texi (Intro to Minibuffers): Add an @dfn for "active
minibuffer".
(Minibuffer Commands): Document that exit-minibuffer throws an error when not
invoked from the innermost Minibuffer.
(Recursive Mini): Amend the description of the visibility of outer level
minibuffers.
(Minibuffer Misc): In the description of the minibuffer hooks, replace "the
minibuffer" with "a minibuffer".
* etc/NEWS (Entry announcing minibuffer-follows-selected-frame): Add a
description of the new non-nil, non-t value.
* lisp/cus-start.el (top level): make the customize entry for
minibuffer-follows-selected-frame a choice between three entries.
* lisp/minibuffer.el (exit-minibuffer): throw an error when we're not in the
most nested minibuffer.
(top level): Bind C-g to abort-minibuffers in minibuffer-local-map.
* lisp/window.el (window-deletable-p): return the symbol `frame' when (amongst
other things) minibuffer-follows-selected-frame is t.
* src/eval.c (internal_catch): Add a mechanism to (throw 'exit t) repeatedly
when the throw currently being processed doesn't terminate the current
minibuffer.
* src/lisp.h (this_minibuffer_depth): New extern declaration
(minibuf_level): extern declaration moved here from window.h.
* src/minibuf.c (minibuffer_follows_frame, minibuf_stays_put)
(minibuf_moves_frame_when_opened): New and amended functions to query the
value of minibuffer-follows-selected-frame.
(choose_minibuf_frame): check (minibuf > 1) in place of (minibufer > 0) at a
particular place. At another place, check that an alleged frame is so and is
live. Before selecting a non-miniwindow on a different frame, ensure it
really is a different frame.
(move_minibuffer_onto_frame): Stack up all recursive minibuffers on the target
frame. Check the minibuf_window isn't in the old frame before setting that
frame's miniwindow to an inactive minibuffer.
(Finnermost_minibuffer_p, Fabort_minibuffers): New primitives.
(this_minibuffer_depth): New function.
(read_minibuf): Record the calling frame in a variable, and switch back to it
after the recursive edit has terminated normally, using
select-frame-set-input-focus. Stack up all the recursive minibuffers on the
miniwindow where a new minibuffer is being opened. After the recursive edit,
switch the selected window away from the expired minibuffer's window.
(nth_minibuffer): New function.
(minibuffer-follows-selected-frame): Change from a DEFVAR_BOOL to a
DEFVAR_LISP.
* src/window.c (decode_next_window_args): Set *minibuf to w's mini-window's
content when that content is a minibuffer.
* src/window.h (minibuf_level) Declaration moved from here to lisp.h.
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* src/eval.c (signal_or_quit): Don't try to call the debugger if it's
inhibited or we are about to dump or bootstrap. In those cases the
debugger probably wouldn't work anyway.
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Run "TZ=UTC0 admin/update-copyright".
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* src/lisp.h (internal_condition_case_4)
(internal_condition_case_5): Declare.
* src/eval.c (internal_condition_case_5): New function.
* src/comp.c (eln_load_path_final_clean_up): Use
'internal_condition_case_5'.
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* src/eval.c (syms_of_eval) <backtrace-on-error-noninteractive>:
Format the doc string according to conventions.
* etc/NEWS: Improve formatting and wording of the entry describing
'backtrace-on-error-noninteractive.
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* src/eval.c (syms_of_eval): Define new variable
'backtrace-on-error-noninteractive' to selectively enable backtrace
printing in batch mode.
(signal_or_quit): Use it.
* etc/NEWS: Document new variable.
* test/src/eval-tests.el (eval-tests/backtrace-in-batch-mode/inhibit):
New unit test.
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* src/eval.c (signal_or_quit): Print a backtrace in batch mode if no
error handler was found.
* test/src/eval-tests.el (eval-tests/backtrace-in-batch-mode)
(eval-tests/backtrace-in-batch-mode/demoted-errors): New unit tests.
* etc/NEWS: Document change.
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We used to store module runtime and environment pointers in the static
lists Vmodule_runtimes and Vmodule_environments. However, this is
incorrect because these objects have to be kept per-thread. With this
naive approach, interleaving module function calls in separate threads
leads to environments being removed in the wrong order, which in turn
can cause local module values to be incorrectly garbage-collected.
The fix isn't completely trivial: specbinding the lists wouldn't work
either, because then the garbage collector wouldn't find the
environments in other threads than the current ones, again leading to
objects being garbage-collected incorrectly. While introducing custom
pseudovector types would fix this, it's simpler to put the runtime and
environment pointers into the specbinding list as new specbinding
kinds. This works since we need to unwind them anyway, and we only
ever treat the lists as a stack. The thread switching machinery
ensures that the specbinding lists are thread-local, and that all
elements of the specbinding lists in all threads are marked during
garbage collection.
Module assertions now have to walk the specbinding list for the
current thread, which is more correct since they now only find
environments for the current thread. As a result, we can now remove
the faulty Vmodule_runtimes and Vmodule_environments variables
entirely.
Also add a unit test that exemplifies the problem. It interleaves two
module calls in two threads so that the first call ends while the
second one is still active. Without this change, this test triggers
an assertion failure.
* src/lisp.h (enum specbind_tag): Add new tags for module runtimes and
environments.
* src/eval.c (record_unwind_protect_module): New function to record a
module object in the specpdl list.
(do_one_unbind): Unwind module objects.
(backtrace_eval_unrewind, default_toplevel_binding, lexbound_p)
(Fbacktrace__locals): Deal with new specbinding types.
(mark_specpdl): Mark module environments as needed.
* src/alloc.c (garbage_collect): Remove call to 'mark-modules'.
Garbage collection of module values is now handled as part of marking
the specpdl of each thread.
* src/emacs-module.c (Fmodule_load, funcall_module): Use specpdl to
record module runtimes and environments.
(module_assert_runtime, module_assert_env, value_to_lisp): Walk
through specpdl list instead of list variables.
(mark_module_environment): Rename from 'mark_modules'. Don't attempt
to walk though current thread's environments only, since that would
miss other threads.
(initialize_environment, finalize_environment): Don't change
Vmodule_environments variable; environments are now in the specpdl
list.
(finalize_environment_unwind, finalize_runtime_unwind): Make 'extern'
since do_one_unbind now calls them.
(finalize_runtime_unwind): Don't change Vmodule_runtimes variable;
runtimes are now in the specpdl list.
(syms_of_module): Remove Vmodule_runtimes and Vmodule_environments.
* test/data/emacs-module/mod-test.c (Fmod_test_funcall): New test
function.
(emacs_module_init): Bind it.
* test/src/emacs-module-tests.el (emacs-module-tests--variable): New
helper type to guard access to state in a thread-safe way.
(emacs-module-tests--wait-for-variable)
(emacs-module-tests--change-variable): New helper functions.
(emacs-module-tests/interleaved-threads): New unit test.
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* src/eval.c (lexbound_p): New function.
(Finternal__define_uninitialized_variable): Use it.
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* src/eval.c (Ffunction): Mention that `function' isn't quite like
`quote' in non-bytecompile circumstances, too (bug#41864).
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* src/eval.c (Fapply): Handle (apply nil) without crashing.
Document single-argument form.
* lisp/emacs-lisp/byte-opt.el (byte-optimize-apply): Don't attempt
to optimize single-argument apply.
* doc/lispref/functions.texi (Calling Functions): Document
single-argument apply. Provide example (bug#40968).
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* src/data.c (Finteractive_form):
* src/eval.c (Fcommandp): Fix builds without modules.
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* src/module-env-28.h: Add field for 'make_interactive' function.
* src/emacs-module.c (Lisp_Module_Function): Add new field holding the
interactive form.
(allocate_module_function): Adapt to structure layout change.
(module_make_interactive, module_function_interactive_form): New
functions.
(initialize_environment): Use them.
* src/eval.c (Fcommandp):
* src/data.c (Finteractive_form): Also handle interactive module
functions.
* test/data/emacs-module/mod-test.c (Fmod_test_identity): New test
function.
(emacs_module_init): Create two interactive module test functions.
* test/src/emacs-module-tests.el (module/interactive/return-t)
(module/interactive/return-t-int, module/interactive/identity):
New unit tests.
* doc/lispref/internals.texi (Module Functions): Document new
function. Rework paragraph about wrapping module functions, as the
example no longer applies.
* etc/NEWS: Document new facility.
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The report that they broke macOS was a false alarm, as the
previous commit was also broken (Bug#43152#62).
* src/alloc.c (live_string_holding, live_cons_holding)
(live_symbol_holding):
Count only pointers that point to a struct component,
or are a tagged pointer to the start of the struct.
Exception: for non-bool-vector pseudovectors,
count any pointer past the header, since it’s too much
of a pain to write code for every pseudovector.
(live_float_holding, live_vector_pointer):
New functions, which are similar about counting pointers.
(live_float_p, live_large_vector_holding)
(live_small_vector_pointer, mark_maybe_pointer): Use them.
(mark_maybe_object, mark_maybe_objects): Remove,
and remove all callers; mark_maybe_pointer now suffices.
(mark_objects): New function.
* src/alloc.c (mark_vectorlike, mark_face_cache):
* src/eval.c (mark_specpdl):
* src/fringe.c (mark_fringe_data):
* src/keyboard.c (mark_kboards):
Simplify by using mark_objects.
* src/lisp.h (SAFE_ALLOCA_LISP_EXTRA):
Clear any Lisp_Object arrays large enough to not fit into the stack,
so that GC need not worry about whether they contain objects.
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* src/alloc.c (live_string_holding, live_cons_holding)
(live_symbol_holding, live_large_vector_holding)
(live_small_vector_holding):
Go back to old approach of treating every would-be pointer to any
byte in the object (though not to just past the object end) as
addressing the object.
(live_float_p): Require that the would-be float point
to the start of the Lisp_Float, and not anywhere else.
(live_vector_pointer, live_float_holding, mark_objects):
Remove. All uses removed.
(mark_maybe_object, mark_maybe_objects):
Bring back these functions.
* src/lisp.h (SAFE_ALLOCA_LISP_EXTRA): Do not clear the
new slots, as they're now checked via mark_maybe_objects,
not via mark_objects.
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* src/alloc.c (mark_vectorlike, mark_face_cache):
* src/eval.c (mark_specpdl):
* src/fringe.c (mark_fringe_data):
* src/keyboard.c (mark_kboards):
Use mark_objects instead of doing it by hand.
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* src/alloc.c (mark_maybe_object, mark_maybe_objects): Remove.
(mark_objects): New function.
* src/eval.c (mark_specpdl): Use mark_objects instead of
mark_maybe_objects, since the array now has only valid Lisp objects.
* src/lisp.h (SAFE_ALLOCA_LISP_EXTRA): When allocating a large
array, clear it so that it contains only valid Lisp objects. This
is simpler and safer, and does not hurt performance significantly
on my usual benchmark as the code is executed so rarely.
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5280e118c0 (origin/emacs-27) ; * src/xdisp.c (pos_visible_p): Fix las...
bb1a9481c9 Fix posn-at-point at beginning of a display string
0c4b033670 Improve documentation of Info node movement commands
632b0119e1 Add Jansson dependency to Windows Build
dbfcdab837 Unbreak 'reverse-region'
c37de84845 Fix typos and markup in fill column indicator docs
f61bff3ee9 ; * CONTRIBUTE: Clarify the preferences for patch formatting.
368e140660 Avoid crashes in 'defconst'
11e3413cff Fix text about Lisp archives in the Emacs FQ
4c81724675 Don't use 'cl' functions in ELisp manual's examples
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* src/eval.c (Fdefconst): Verify that SYMBOL is a known symbol.
(Bug#41817)
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Add an initial implementation to support dynamic scope. Arg
parsing/binding it's done using the existing code in use for
bytecode (no ad-hoc code is synthetized for that).
* src/lisp.h (struct Lisp_Subr): Add lambda_list field.
(SUBR_NATIVE_COMPILED_DYNP): New inliner.
* src/alloc.c (mark_object): Update for Add lambda_list field.
* src/eval.c (eval_sub, Ffuncall, funcall_lambda): Handle native
compiled dynamic scope
* src/comp.c (declare_lex_function): Rename from declare_function
and rework.
(declare_function): New function.
(make_subr): Handle daynamic scope
* src/pdumper.c (dump_subr): Update for lambda_list field.
* lisp/emacs-lisp/comp.el (comp-func): Remove args slot.
(comp-func-l, comp-func-d): New classes deriving from `comp-func'.
(comp-spill-lap-function): Rework.
(comp-prepare-args-for-top-level): New function.
(comp-emit-for-top-level, comp-emit-lambda-for-top-level): Make
use of `comp-prepare-args-for-top-level'.
(comp-limplify-top-level): Use `comp-func-l'.
(comp-limplify-function): Emit arg prologue only for dynamic
scoped functions.
(comp-call-optim-form-call): Use `comp-func-l'.
(comp-call-optim, comp-tco): Do not optimize dynamic scoped code.
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When closing emacs will inspect all directories from which it loaded
native compilation units. If it finds a ".eln.old" file it will try to
delete it, if it fails that means that another Emacs instance is using it.
When compiling a file we rename the file that was in the output path
in case it has been loaded into another Emacs instance.
When deleting a package we move any ".eln" or ".eln.old" files in the
package folder that we can't delete to `package-user-dir`. Emacs will
check that directory when closing and delete them.
* lisp/emacs-lisp/comp.el (comp--replace-output-file): Function called
from C code to finish the compilation process. It performs renaming of
the old file if necessary.
* lisp/emacs-lisp/package.el (package--delete-directory): Function to
delete a package directory. It moves native compilation units that it
can't delete to `package-user-dir'.
* src/alloc.c (cleanup_vector): Call dispose_comp_unit().
(garbage_collect): Call finish_delayed_disposal_of_comp_units().
* src/comp.c: Restore the signal mask using unwind-protect. Store
loaded native compilation units in a hash table for disposal on
close. Store filenames of native compilation units GC'd in a linked
list to finish their disposal when the GC is over.
(clean_comp_unit_directory): Delete all *.eln.old files in a
directory.
(clean_package_user_dir_of_old_comp_units): Delete all *.eln.old files
in `package-user-dir'.
(dispose_all_remaining_comp_units): Dispose of native compilation
units that are still loaded.
(dispose_comp_unit): Close handle and cleanup directory or arrange for
later cleanup if DELAY is true.
(finish_delayed_disposal_of_comp_units): Dispose of native compilation
units that were GC'd.
(register_native_comp_unit): Register native compilation unit for
disposal when Emacs closes.
* src/comp.h: Introduce cfile member in Lisp_Native_Comp_Unit.
Add declarations of functions that: clean directories of unused native
compilation units, handle disposal of native compilation units.
* src/emacs.c (kill-emacs): Dispose all remaining compilation units
right right before calling exit().
* src/eval.c (internal_condition_case_3, internal_condition_case_4):
Add functions.
* src/lisp.h (internal_condition_case_3, internal_condition_case_4):
Add functions.
* src/pdumper.c (dump_do_dump_relocation): Set cfile to a copy of the
Lisp string specifying the file path.
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* src/eval.c (Ffetch_bytecode): Check for multibyte bytecodes
here too. Problem reported by Stefan Monnier in:
https://lists.gnu.org/r/emacs-devel/2020-05/msg02876.html
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Check Lisp_Compiled objects better as they’re created,
so that the byte-code interpreter needn’t do the checks
each time it executes them. This improved performance
of ‘make compile-always’ by 1.5% on my platform. Also,
improve the quality of the (still-incomplete) checks, as
this is more practical now that they’re done less often.
* src/alloc.c (make_byte_code): Remove. All uses removed.
(Fmake_byte_code): Put a better (though still incomplete)
check here instead. Simplify by using Fvector instead
of make_uninit_vector followed by memcpy, and by using
XSETPVECTYPE instead of make_byte_code followed by XSETCOMPILED.
* src/bytecode.c (Fbyte_code): Do sanity check and conditional
translation to unibyte here instead of each time the function is
executed.
(exec_byte_code): Omit no-longer-necessary sanity and
unibyte checking. Use SCHARS instead of SBYTES where
either will do, as SCHARS is faster.
* src/eval.c (fetch_and_exec_byte_code): New function.
(funcall_lambda): Use it.
(funcall_lambda, lambda_arity, Ffetch_bytecode):
Omit no-longer-necessary sanity checks.
(Ffetch_bytecode): Add sanity check if actually fetching.
* src/lisp.h (XSETCOMPILED): Remove. All uses removed.
* src/lread.c (read1): Check byte-code objects more thoroughly,
albeit still incompletely, and do translation to unibyte here
instead of each time the function is executed.
(read1): Use XSETPVECYPE instead of make_byte_code.
(read_vector): Omit no-longer-necessary sanity check.
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backtrace_eval_unrewind is used to temporarily reverse
let-bindings (it's called with a positive argument to reverse
bindings, and then a negative argument to re-apply them) by
backtrace--locals and backtrace-eval. For the SPECPDL_LET_DEFAULT and
SPECPDL_LET_LOCAL cases (which occur for let-bindings on buffer-local
variables), the code calls Fdefault_value and Fbuffer_local_value on
the symbol.
For symbols which are unbound at top-level, the first (with positive
argument) call to backtrace_eval_unrewind will set the symbol's value
to unbound (putting the current value in the specpdl's "old value"
slot). On the second (with negative argument) call,
backtrace_eval_unrewind attempts to retrieve the symbol's value with
Fdefault_value or Fbuffer_local_value, but that raises a void-variable
signal. This interrupts the restoration of the let-bindings, so any
other variables more recent on the stack will now have the wrong
value.
* src/data.c (default_value): Make non-static.
* src/lisp.h: Declare it.
* src/eval.c (backtrace_eval_unrewind): Replace the calls to
Fdefault_value and Fbuffer_local_value with default_value and
buffer_local_value, respectively. The latter do exactly the same as
the former, except if the symbol's value is Qunbound they just return
it instead of signaling void-variable.
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