Based on Pip Cet’s review (Bug#36370#13).
* src/ccl.c (Fccl_execute_on_string): Use clearer indexing.
* src/dosfns.c (Fint86, Fdos_memput):
Avoid runtime checks for negative fixnums when debugging.
This restores the earlier machine code.
* src/lisp.h (XFIXNUM, XUFIXNUM): Use eassert, not eassume.
(XFIXNAT): At the start, merely eassert FIXNUMP rather
than eassuming FIXNATP. At the end, eassume that the
result is nonnegative. This restores help to the compiler
that the previous patch mistakenly removed.
A few bits of the code were relying on the fact that XFIXNUM,
XFIXNAT, and XUFIXNUM do something even with arguments that
are not fixnums/fixnats. Separate these rare uses out into
XFIXNUM_RAW and XUFIXNUM_RAW.
Problem and original patch reported by Pip Cet (Bug#36370).
* src/ccl.c (Fccl_execute_on_string):
* src/fileio.c (Finsert_file_contents, a_write)
(Fdo_auto_save):
* src/process.c (conv_lisp_to_sockaddr):
* src/textprop.c (Fnext_single_char_property_change)
(Fprevious_single_char_property_change)
(Fnext_property_change, Fnext_single_property_change)
(Fprevious_property_change)
(Fprevious_single_property_change):
Don’t assume fixnums are nonnegative.
* src/ccl.c (Fccl_execute_on_string):
Fix range-checking bug if AREF (status, i) is out of int range.
* src/data.c (arith_driver): Use XFIXNUM_RAW as we want
efficient garbage if the value is not a fixnum.
* src/dosfns.c (Fint86, Fdos_memput):
Check that args are nonnegative.
* src/image.c (lookup_image): Check that args are in range.
* src/lisp.h (lisp_h_XHASH): Use XUFIXNUM_RAW, since this
is for hashing.
(lisp_h_XFIXNAT, XFIXNAT) [USE_LSB_TAG]: Remove macros.
(lisp_h_XFIXNUM_RAW, XFIXNUM_RAW) [USE_LSB_TAG]: New macros, with
the semantics of the old macros without _RAW.
(XFIXNUM_RAW, XUFIXNUM_RAW): New inline functions, with the
semantics of the old functions without _RAW.
(FIXNUMP): Move definition up to avoid forward use.
(XFIXNUM, XFIXNAT, XUFIXNUM): Use eassume to add a runtime
check (when debugging) that the argument has the proper form.
(XFIXNUM, XFIXNAT): Now inline functions only, since they
refer to their arguments more than once now that they use eassume.
* src/textprop.c (Fprevious_single_char_property_change):
Avoid fixnum overflow with invalid input.
(set_text_properties): Fix unlikely failure
to validate arguments, by using EQ instead of XFIXNAT.
* src/w32term.c (w32_draw_glyph_string):
* src/xterm.c (x_draw_glyph_string):
Treat negative minimums as 0 rather than as garbage patterns.
Work around Bug#22884 by rewording comments and strings to avoid ‘(’
at the start of a line unless it starts a function. This change
is a short-term hack; in the longer run we plan to fix cc-mode’s
performance for C files that have ‘(’ at the start of a line in a
comment or string.
Fixes Bug#15880.
This patch also makes Q constants (e.g., Qnil) constant addresses
from the C point of view.
* make-docfile.c: Revamp to generate table of symbols, too.
Include <stdbool.h>.
(xstrdup): New function.
(main): Don't process the same file twice.
(SYMBOL): New constant in enum global_type.
(struct symbol): Turn 'value' member into a union, either v.value
for int or v.svalue for string. All uses changed.
(add_global): New arg svalue, which overrides value, so that globals
can have a string value.
(close_emacs_global): New arg num_symbols; all uses changed.
Output lispsym decl.
(write_globals): Output symbol globals too. Output more
ATTRIBUTE_CONST, now that Qnil etc. are C constants.
Output defsym_name table.
(scan_c_file): Move most of guts into ...
(scan_c_stream): ... new function. Scan for DEFSYMs and
record symbols found. Don't read past EOF if file doesn't
end in newline.
* alloc.c, bidi.c, buffer.c, bytecode.c, callint.c, casefiddle:
* casetab.c, category.c, ccl.c, charset.c, chartab.c, cmds.c, coding.c:
* composite.c, data.c, dbusbind.c, decompress.c, dired.c, dispnew.c:
* doc.c, editfns.c, emacs.c, eval.c, fileio.c, fns.c, font.c, fontset.c:
* frame.c, fringe.c, ftfont.c, ftxfont.c, gfilenotify.c, gnutls.c:
* image.c, inotify.c, insdel.c, keyboard.c, keymap.c, lread.c:
* macfont.m, macros.c, minibuf.c, nsfns.m, nsfont.m, nsimage.m:
* nsmenu.m, nsselect.m, nsterm.m, print.c, process.c, profiler.c:
* search.c, sound.c, syntax.c, term.c, terminal.c, textprop.c, undo.c:
* window.c, xdisp.c, xfaces.c, xfns.c, xftfont.c, xmenu.c, xml.c:
* xselect.c, xsettings.c, xterm.c:
Remove Q vars that represent symbols (e.g., Qnil, Qt, Qemacs).
These names are now defined automatically by make-docfile.
* alloc.c (init_symbol): New function.
(Fmake_symbol): Use it.
(c_symbol_p): New function.
(valid_lisp_object_p, purecopy): Use it.
* alloc.c (marked_pinned_symbols):
Use make_lisp_symbol instead of make_lisp_ptr.
(garbage_collect_1): Mark lispsym symbols.
(CHECK_ALLOCATED_AND_LIVE_SYMBOL): New macro.
(mark_object): Use it.
(sweep_symbols): Sweep lispsym symbols.
(symbol_uses_obj): New function.
(which_symbols): Use it. Work for lispsym symbols, too.
(init_alloc_once): Initialize Vpurify_flag here; no need to wait,
since Qt's address is already known now.
(syms_of_alloc): Add lispsym count to symbols_consed.
* buffer.c (init_buffer_once): Compare to Qnil, not to make_number (0),
when testing whether storage is all bits zero.
* dispextern (struct image_type):
* font.c (font_property_table):
* frame.c (struct frame_parm_table, frame_parms):
* keyboard.c (scroll_bar_parts, struct event_head):
* xdisp.c (struct props):
Use XSYMBOL_INIT (Qfoo) and struct Lisp_Symbol * rather than &Qfoo and
Lisp_Object *, since Qfoo is no longer an object whose address can be
taken. All uses changed.
* eval.c (run_hook): New function. Most uses of Frun_hooks changed to
use it, so that they no longer need to take the address of a Lisp sym.
(syms_of_eval): Don't use DEFSYM on Vrun_hooks, as it's a variable.
* frame.c (syms_of_frame): Add defsyms for the frame_parms table.
* keyboard.c (syms_of_keyboard): Don't DEFSYM Qmenu_bar here.
DEFSYM Qdeactivate_mark before the corresponding var.
* keymap.c (syms_of_keymap): Use DEFSYM for Qmenu_bar and Qmode_line
instead of interning their symbols; this avoids duplicates.
(LISP_INITIALLY, TAG_PTR)
(DEFINE_LISP_SYMBOL_BEGIN, DEFINE_LISP_SYMBOL_END, XSYMBOL_INIT):
New macros.
(LISP_INITIALLY_ZERO): Use it.
(enum symbol_interned, enum symbol_redirect, struct Lisp_Symbol)
(EXFUN, DEFUN_ARGS_MANY, DEFUN_ARGS_UNEVALLED, DEFUN_ARGS_*):
Move decls up, to avoid forward uses. Include globals.h earlier, too.
(make_lisp_symbol): New function.
(XSETSYMBOL): Use it.
(DEFSYM): Now just a placeholder for make-docfile.
* lread.c (DEFINE_SYMBOLS): Define, for globals.h.
(intern_sym): New function, with body taken from old intern_driver.
(intern_driver): Use it. Last arg is now Lisp integer, not ptrdiff_t.
All uses changed.
(define_symbol): New function.
(init_obarray): Define the C symbols taken from lispsym.
Use plain DEFSYM for Qt and Qnil.
* syntax.c (init_syntax_once): No need to worry about
Qchar_table_extra_slots.
src/dosfns.c (dos_memory_info): New function.
src/dosfns.h (dos_memory_info): Add prototype.
src/alloc.c (Fmemory_info) [MSDOS]: Call dos_memory_info.
src/vm-limit.c (get_lim_data) [MSDOS]: Call dos_memory_info, instead
of doing some of its job.
redisplay--mode-lines-cause.
(redisplay_internal): Keep them uptodate. Remove redundant check of
buffer_shared_and_changed.
* *.[chm]: Number every assignment to update_mode_lines so we
can track why it is set.
* nt/inc/ms-w32.h (emacs_raise): New macro.
* src/alloc.c (die):
* src/sysdep.c (emacs_abort) [HAVE_NTGUI]:
Avoid recursive loop if there's a fatal error in the function itself.
* src/atimer.c (pending_atimers):
* src/blockinput.h: Don't include "atimer.h"; no longer needed.
(interrupt_input_pending): Remove. All uses removed.
pending_signals now counts both atimers and ordinary interrupts.
This is less racy than having three separate pending-signal flags.
(block_input, unblock_input, totally_unblock_input, unblock_input_to)
(input_blocked_p):
Rename from their upper-case counterparts BLOCK_INPUT,
UNBLOCK_INPUT, TOTALLY_UNBLOCK_INPUT, UNBLOCK_INPUT_TO,
INPUT_BLOCKED_P, and turn into functions. All uses changed.
This makes it easier to access volatile variables more accurately.
(BLOCK_INPUT_RESIGNAL): Remove. All uses replaced by unblock_input ().
(input_blocked_p): Prefer this to 'interrupt_input_blocked', as
that's more reliable if the code is buggy and sets
interrupt_input_blocked to a negative value. All uses changed.
* src/atimer.c (deliver_alarm_signal):
Remove. No need to deliver this to the parent; any thread can
handle this signal now. All uses replaced by underlying handler.
* src/atimer.c (turn_on_atimers):
* src/dispnew.c (handle_window_change_signal):
* src/emacs.c (handle_danger_signal):
* src/keyboard.c (kbd_buffer_get_event):
Don't reestablish signal handler; not needed with sigaction.
* src/blockinput.h (UNBLOCK_INPUT_TO, TOTALLY_UNBLOCK_INPUT)
(UNBLOCK_INPUT_TO):
Rework to avoid unnecessary accesses to volatile variables.
(UNBLOCK_INPUT_TO): Now a function.
(totally_unblock_input, unblock_input): New decls.
* src/data.c (handle_arith_signal, deliver_arith_signal): Move to sysdep.c
(init_data): Remove. Necessary stuff now done in init_signal.
* src/emacs.c, src/xdisp.c: Include "atimer.h", since we invoke atimer functions.
* src/emacs.c (handle_fatal_signal, deliver_fatal_signal): Move to sysdep.c.
(fatal_error_code): Remove; no longer needed.
(terminate_due_to_signal): Rename from fatal_error_backtrace, since
it doesn't always backtrace. All uses changed. No need to reset
signal to default, since sigaction and/or die does that for us now.
Use emacs_raise (FOO), not kill (getpid (), FOO).
(main): Check more-accurately whether we're dumping.
Move fatal-error setup to sysdep.c
* src/floatfns.c: Do not include "syssignal.h"; no longer needed.
* src/gtkutil.c (xg_get_file_name, xg_get_font):
Remove no-longer-needed signal-mask manipulation.
* src/keyboard.c, src/process.c (POLL_FOR_INPUT):
Don't depend on USE_ASYNC_EVENTS, a symbol that is never defined.
* src/keyboard.c (read_avail_input): Remove.
All uses replaced by gobble_input.
(Ftop_level): Use TOTALLY_UNBLOCK_INPUT rather than open code.
(kbd_buffer_store_event_hold, gobble_input):
(record_asynch_buffer_change) [USABLE_SIGIO]:
(store_user_signal_events):
No need to mess with signal mask.
(gobble_input): If blocking input and there are terminals, simply
set pending_signals to 1 and return. All hooks changed to not
worry about whether input is blocked.
(process_pending_signals): Clear pending_signals before processing
them, in case a signal comes in while we're processing.
By convention callers now test pending_signals before calling us.
(UNBLOCK_INPUT_TO, unblock_input, totally_unblock_input):
New functions, to support changes to blockinput.h.
(handle_input_available_signal): Now extern.
(reinvoke_input_signal): Remove. All uses replaced by
handle_async_input.
(quit_count): Now volatile, since a signal handler uses it.
(handle_interrupt): Now takes bool IN_SIGNAL_HANDLER as arg. All
callers changed. Block SIGINT only if not already blocked.
Clear sigmask reliably, even if Fsignal returns, which it can.
Omit unnecessary accesses to volatile var.
(quit_throw_to_read_char): No need to restore sigmask.
* src/keyboard.c (gobble_input, handle_user_signal):
* src/process.c (wait_reading_process_output):
Call signal-handling code rather than killing ourselves.
* src/lisp.h: Include <float.h>, for...
(IEEE_FLOATING_POINT): New macro, moved here to avoid duplication.
(pending_signals): Now volatile.
(syms_of_data): Now const if IEEE floating point.
(handle_input_available_signal) [USABLE_SIGIO]:
(terminate_due_to_signal, record_child_status_change): New decls.
* src/process.c (create_process): Avoid disaster if memory is exhausted
while we're processing a vfork, by tightening the critical section
around the vfork.
(send_process_frame, process_sent_to, handle_pipe_signal)
(deliver_pipe_signal): Remove. No longer needed, as Emacs now
ignores SIGPIPE.
(send_process): No need for setjmp/longjmp any more, since the
SIGPIPE stuff is now gone. Instead, report an error if errno
is EPIPE.
(record_child_status_change): Now extern. PID and W are now args.
Return void, not bool. All callers changed.
* src/sysdep.c (wait_debugging) [(BSD_SYSTEM || HPUX) && !defined (__GNU__)]:
Remove. All uses removed. This bug should be fixed now in a
different way.
(wait_for_termination_1): Use waitpid rather than sigsuspend,
and record the child status change directly. This avoids the
need to futz with the signal mask.
(process_fatal_action): Move here from emacs.c.
(emacs_sigaction_flags): New function, containing
much of what used to be in emacs_sigaction_init.
(emacs_sigaction_init): Use it. Block nonfatal system signals that are
caught by emacs, to make races less likely.
(deliver_process_signal): Rename from handle_on_main_thread.
All uses changed.
(BACKTRACE_LIMIT_MAX): Now at top level.
(thread_backtrace_buffer, threadback_backtrace_pointers):
New static vars.
(deliver_thread_signal, deliver_fatal_thread_signal):
New functions, for more-accurate delivery of thread-specific signals.
(handle_fatal_signal, deliver_fatal_signal): Move here from emacs.c.
(deliver_arith_signal): Handle in this thread, not
in the main thread, since it's triggered by this thread.
(maybe_fatal_sig): New function.
(init_signals): New arg DUMPING so that we can be more accurate
about whether we're dumping. Caller changed.
Treat thread-specific signals differently from process-general signals.
Block all signals while handling fatal error; that's safer.
xsignal from SIGFPE only on non-IEEE hosts, treating it as fatal
on IEEE hosts.
When batch, ignore SIGHUP, SIGINT, SIGTERM if they were already ignored.
Ignore SIGPIPE unless batch.
(emacs_backtrace): Output backtrace for the appropriate thread,
which is not necessarily the main thread.
* src/syssignal.h: Include <stdbool.h>.
(emacs_raise): New macro.
* src/xterm.c (x_connection_signal): Remove; no longer needed
now that we use sigaction.
(x_connection_closed): No need to mess with sigmask now.
(x_initialize): No need to reset SIGPIPE handler here, since
init_signals does this for us now.
Fixes: debbugs:12471
* configure.ac (HAVE__SETJMP, HAVE_SIGSETJMP): New symbols.
(_setjmp, _longjmp): Remove.
* src/lisp.h: Include <setjmp.h> here, since we use its symbols here.
All instances of '#include <setjmp.h>' removed, if the
only reason for the instance was because "lisp.h" was included.
(sys_jmp_buf, sys_setjmp, sys_longjmp): New symbols.
Unless otherwise specified, replace all uses of jmp_buf, _setjmp,
and _longjmp with the new symbols. Emacs already uses _setjmp if
available, so this change affects only POSIXish hosts that have
sigsetjmp but not _setjmp, such as some versions of Solaris and
Unixware. (Also, POSIX-2008 marks _setjmp as obsolescent.)
* src/image.c (_setjmp, _longjmp) [HAVE_PNG && !HAVE__SETJMP]: New macros.
(png_load_body) [HAVE_PNG]:
(PNG_LONGJMP) [HAVE_PNG && PNG_LIBPNG_VER < 10500]:
(PNG_JMPBUF) [HAVE_PNG && PNG_LIBPNG_VER >= 10500]:
Use _setjmp and _longjmp rather than sys_setjmp and sys_longjmp,
since PNG requires jmp_buf. This is the only exception to the
general rule that we now use sys_setjmp and sys_longjmp.
This exception is OK since this code does not change the signal
mask or longjmp out of a signal handler.
Fixes: debbugs:12446
Replace all uses with calls to new setter functions.
Use INLINE_HEADER_BEGIN, INLINE_HEADER_END.
(FRAME_INLINE): New macro.
(fset_buffer_list, fset_buried_buffer_list, fset_condemned_scroll_bars)
(fset_current_tool_bar_string, fset_desired_tool_bar_string)
(fset_face_alist, fset_focus_frame, fset_icon_name, fset_menu_bar_items)
(fset_menu_bar_vector, fset_menu_bar_window, fset_name)
(fset_param_alist, fset_root_window, fset_scroll_bars)
(fset_selected_window, fset_title, fset_tool_bar_items)
(fset_tool_bar_position, fset_tool_bar_window): New functions.
* frame.c (FRAME_INLINE):
Define to EXTERN_INLINE, so that the corresponding functions
are compiled into code.
(fset_buffer_predicate, fset_minibuffer_window): New setter functions.
* src/lisp.h (build_unibyte_string): New function.
* src/dosfns.c, src/fileio.c, src/fns.c, src/ftfont.c, src/process.c:
* src/sysdep.c, src/w32fns.c, src/xfns.c: Use it.
* src/font.c (font_open_by_name): Change 2nd and 3rd args to the only arg
of type Lisp_Object to avoid redundant calls to make_unibyte_string.
Adjust users accordingly.
* src/font.h (font_open_by_name): Adjust prototype.
* admin/coccinelle/unibyte_string.cocci: Semantic patch to convert from
make_unibyte_string to build_unibyte_string where appropriate.
msdos/mainmake.v2 (bootstrap-clean): Do a maintainer-clean in lib, not
bootstrap-clean (which doesn't exist).
msdos/inttypes.h (PRIuMAX) [__DJGPP__ < 2.04]: Define to "llu".
msdos/sedleim.inp (MKDIR_P): Edit to DOS "md" command.
msdos/sed1v2.inp: (LIB_CLOCK_GETTIME): Edit to empty.
Remove lines that invoke PAXCTL.
(clean): Fix recipe not to run Unixy shell commands.
msdos/sed2v2.inp (GETTIMEOFDAY_TIMEZONE): Edit to 'struct timezone'.
(HAVE_STRNCASECMP): Edit to 1.
msdos/sed3v2.inp (LIB_CLOCK_GETTIME): Edit to empty.
(C_SWITCH_SYSTEM): Add "-I../msdos".
msdos/sedlibmk.inp (GNULIB_GETTIMEOFDAY, GNULIB_PSELECT)
(GNULIB_SELECT, HAVE_STRUCT_TIMEVAL, HAVE_SYS_SELECT_H)
(HAVE_SYS_TIME_H, NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H)
(NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H, NEXT_SYS_SELECT_H)
(NEXT_SYS_TIME_H, REPLACE_GETTIMEOFDAY, REPLACE_PSELECT)
(REPLACE_STRUCT_TIMEVAL): Edit to appropriate values.
(BUILT_SOURCES): Edit out sys/select.h and sys/time.h.
(mostlyclean-local, distclean-generic): Fix recipe not to run
Unixy shell commands.
src/sysselect.h [DOS_NT]: Don't include sys/select.h.
src/s/ms-w32.h (select, pselect): Don't define here, they are
defined in sysselect.h
src/sysselect.h (pselect) [!HAVE_PSELECT]: Redirect to sys_select.
src/sysdep.c: Don't include dos.h and dosfns.h.
src/process.c (sys_select):
src/msdos.c (sys_select): Accept one more argument and ignore it.
src/msdos.c (event_timestamp, sys_select): Use gnulib's gettime;
adapt data types and code to that.
src/dosfns.c:
src/msdos.c (gettime, settime): Define away the prototypes in dos.h,
which clashes with the gnulib function of the same name.
lisp/emacs-lisp/timer.el (timer-until): Subtract results of
float-time, instead of taking float-time of the result of
time-subtract, since float-time signals an error for negative time
arguments.
* font.c, image.c, keyboard.c, lread.c, menu.c, minibuf.c, msdos.c:
* print.c, syntax.c, window.c, xmenu.c, xselect.c: Replace direct
access to `contents' member of Lisp_Vector objects with AREF and ASET
where appropriate.
msdos/inttypes.h: New file.
msdos/sed2v2.inp (HAVE_DECL_STRTOULL, HAVE_DECL_STRTOUMAX)
(HAVE_STRTOULL, HAVE_STRTOULL): Define to 1.
src/sedlibmk.inp (BUILT_SOURCES): Edit out inttypes.h.
src/sed1v2.inp (CPPFLAGS): Edit to "-I../msdos".
Add ../msdos/inttypes.h to prerequisites of lread.o.
src/dosfns.c (Fint86, Fdos_memget, Fdos_memput): Use `ASIZE (FOO)'
rather than `XVECTOR (FOO)->size'.
