| Commit message (Collapse) | Author | Age | Files | Lines |
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* debug.h (debug_init): Define as ((void) 0) macro in the
no debug support case.
* unwind.h (uw_last_form_expanded): No-debug-support version
must yield a value, not void.
* unwind.c (ffcal_frame_type, eval_frame_type, expand_frame_type):
Define only if CONFIG_DEBUG_SUPPORT is enabled, to suppress
unused warnings.
* eval.c (do_eval): Conditionally define debug-related code.
The uw_push_eval function doesn't exist if CONFIG_DEBUG_SUPPORT
isn't enabled.
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* LICENSE, LICENSE-CYG, METALICENSE, Makefile, alloca.h,
args.c, args.h, arith.c, arith.h, autoload.c, autoload.h,
buf.c, buf.h, cadr.c, cadr.h, chksum.c, chksum.h,
chksums/crc32.c, chksums/crc32.h, combi.c, combi.h, configure,
debug.c, debug.h, eval.c, eval.h, ffi.c, ffi.h, filter.c,
filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c, glob.h, gzio.c,
gzio.h, hash.c, hash.h, itypes.c, itypes.h, jmp.S,
lex.yy.c.shipped, lib.c, lib.h, linenoise/linenoise.c,
linenoise/linenoise.h, match.c, match.h, parser.c, parser.h,
parser.l, parser.y, protsym.c, psquare.h, rand.c, rand.h,
regex.c, regex.h, signal.c, signal.h, socket.c, socket.h,
stdlib/arith-each.tl, stdlib/asm.tl, stdlib/awk.tl,
stdlib/build.tl, stdlib/cadr.tl, stdlib/compiler.tl,
stdlib/constfun.tl, stdlib/conv.tl, stdlib/copy-file.tl,
stdlib/debugger.tl, stdlib/defset.tl, stdlib/doloop.tl,
stdlib/each-prod.tl, stdlib/error.tl, stdlib/except.tl,
stdlib/ffi.tl, stdlib/getopts.tl, stdlib/getput.tl,
stdlib/hash.tl, stdlib/ifa.tl, stdlib/keyparams.tl,
stdlib/match.tl, stdlib/op.tl, stdlib/optimize.tl,
stdlib/package.tl, stdlib/param.tl, stdlib/path-test.tl,
stdlib/pic.tl, stdlib/place.tl, stdlib/pmac.tl,
stdlib/quips.tl, stdlib/save-exe.tl, stdlib/socket.tl,
stdlib/stream-wrap.tl, stdlib/struct.tl, stdlib/tagbody.tl,
stdlib/termios.tl, stdlib/trace.tl, stdlib/txr-case.tl,
stdlib/type.tl, stdlib/vm-param.tl, stdlib/with-resources.tl,
stdlib/with-stream.tl, stdlib/yield.tl, stream.c, stream.h,
struct.c, struct.h, strudel.c, strudel.h, sysif.c, sysif.h,
syslog.c, syslog.h, termios.c, termios.h, time.c, time.h,
tree.c, tree.h, txr.1, txr.c, txr.h, unwind.c, unwind.h,
utf8.c, utf8.h, vm.c, vm.h, vmop.h, win/cleansvg.txr,
y.tab.c.shipped: Copyright year bumped to 2023.
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* jmp.S (jmp_save, jmp_restore): Define for Loongarch.
* unwind.h (struct jmp): Likewise.
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Everything compiles, and most tests pass. Failing test are:
- tests/014/dgram-stream.tl:
- tests/017/glob-carray.tl:
- tests/017/qsort.tl:
The datagram test is not able to bind a UDP socket to a port.
On the gcc402 machine of the GCC Compile Farm, attempts bind a
UDP socket to any of the ports 1024-65535 all fail with errno
99 (EADDRNOTAVAIL).
The FFI test cases are segfaulting. The qosrt.tl case has
the problem in the test cases which abort the callback with
a return-from.
* unwind.h (struct jmp): Define for RISC-V.
* jmp.S (DEFUN): Define macro for RISC-V.
(jmp_save, jmp_restore): Define for RISC-V.
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*LICENSE, LICENSE-CYG, METALICENSE, Makefile, alloca.h,
args.c, args.h, arith.c, arith.h, buf.c, buf.h, cadr.c,
cadr.h, chksum.c, chksum.h, chksums/crc32.c, chksums/crc32.h,
combi.c, combi.h, configure, debug.c, debug.h, eval.c, eval.h,
ffi.c, ffi.h, filter.c, filter.h, ftw.c, ftw.h, gc.c, gc.h,
glob.c, glob.h, hash.c, hash.h, itypes.c, itypes.h, jmp.S,
lex.yy.c.shipped, lib.c, lib.h, linenoise/linenoise.c,
linenoise/linenoise.h, lisplib.c, lisplib.h, match.c, match.h,
parser.c, parser.h, parser.l, parser.y, protsym.c, psquare.h,
rand.c, rand.h, regex.c, regex.h, signal.c, signal.h,
socket.c, socket.h, stdlib/arith-each.tl, stdlib/asm.tl,
stdlib/awk.tl, stdlib/build.tl, stdlib/cadr.tl,
stdlib/compiler.tl, stdlib/constfun.tl, stdlib/conv.tl,
stdlib/copy-file.tl, stdlib/debugger.tl, stdlib/defset.tl,
stdlib/doloop.tl, stdlib/each-prod.tl, stdlib/error.tl,
stdlib/except.tl, stdlib/ffi.tl, stdlib/getopts.tl,
stdlib/getput.tl, stdlib/hash.tl, stdlib/ifa.tl,
stdlib/keyparams.tl, stdlib/match.tl, stdlib/op.tl,
stdlib/optimize.tl, stdlib/package.tl, stdlib/param.tl,
stdlib/path-test.tl, stdlib/pic.tl, stdlib/place.tl,
stdlib/pmac.tl, stdlib/quips.tl, stdlib/save-exe.tl,
stdlib/socket.tl, stdlib/stream-wrap.tl, stdlib/struct.tl,
stdlib/tagbody.tl, stdlib/termios.tl, stdlib/trace.tl,
stdlib/txr-case.tl, stdlib/type.tl, stdlib/vm-param.tl,
stdlib/with-resources.tl, stdlib/with-stream.tl,
stdlib/yield.tl, stream.c, stream.h, struct.c, struct.h,
strudel.c, strudel.h, sysif.c, sysif.h, syslog.c, syslog.h,
termios.c, termios.h, time.c, time.h, tree.c, tree.h, txr.1,
txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h, vm.c, vm.h,
vmop.h, win/cleansvg.txr, y.tab.c.shipped: Copyright year
bumped to 2022.
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* unwind.h (uw_last_form_expanded): Add missing # token.
Because of this, code won't compile without CONFIG_DEBUG_SUPPORT.
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The use of -ansi doesn't by itself diagnose instances of some
constructs we don't want in the project, like mixed
declarations and statements.
* configure (diag_flags): Add -Werror=declaration-after-statement.
This is C only, so filter it out for C++.
Also add -Werror=vla.
* HACKING: Update inaccurate statements about what dialect we
are using. TXR isn't pure C90: some GCC extensions are used.
We even use long long if the configure script detects it as
working, and some C99 library features.
* buf.c (replace_buf, buf_list): Fix by reordering.
* eval.c (op_dohash, op_load_time_lit): Fix by reordering.
* ffi.c (ffi_simple_release): Fix by reordering.
(align_sw_get): Fix empty macro to expand to dummy declaration
so a semicolon after it isn't interpreted as a statement.
On platforms with alignment, remove a semicolon from the macro
so that it requires one.
(ffi_i8_put, ffi_u8_put): Fix by reordering.
* gc.c (gc_init): Fix with extra braces.
* hash.c (hash_init): Fix by reordering.
* lib.c (list_collect_revappend, sub_iter, replace_str,
replace_vec, mapcar_listout, mappend, mapdo, window_map_list,
subst): Fix by reordering.
(gensym, find, rfind, pos, rpos, in, search_common): Fix by
renaming optional argument and using declaration instead of
assignment.
* linenoise/linenoise.c (edit_in_editor): Fix by reordering.
* parser.c (is_balanced_line): Fix by reordering.
* regex.c (nfa_count_one, print_rec): Fix by reordering.
* signal.c (sig_mask): Fix by reordering.
* stream.c (get_string): Fix by renaming optional argument and
using declaration instead of assignment.
* struct.c (lookup_static_slot_desc): Fix by turning mutated
variable into block local.
(umethod_args_fun): Fix by reordering.
(get_special_slot): Fix by new scope via braces.
* sysif.c (usleep_wrap): Fix by new scope via braces.
(setrlimit_wrap): Fix by new scope via braces.
* time.c (time_string_meth, time_parse_meth): Fix by reordering.
* tree.c (tr_do_delete_spec): Fix by new scope via braces.
* unwind.h (uw_block_beg): New macro which doesn't define
RESULTVAR but expects it to refers to an existing one.
(uw_block_begin): Replace do while (0) with enum trick
so that we have a declaration that requires a semicolon,
rather than a statement, allowing declarations to follow.
(uw_match_env_begin): Now opens a scope and features the
same enum trick as in uw_block_begin.
This fixes a declaration-follows-statement issue in
the v_output function in match.c.
(uw_match_env_end): Closes scope opened by uw_match_env_begin.
* unwind.c (revive_cont): Fix by introducing variable, and
using new uw_block_beg macro.
* vm.c (vm_execute_closure): Fix using combination of local
variable and reordering.
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Basic idea: when we throw an exception that pertains to a
system error which has an errno code, we can stick the errno
into the memory area of the character string, into the wchar_t
that immediately follows the null terminator. We can do this
because strings track their actual allocation size.
A pair of setter/getter functions to set and retrieve this
value are provided, and all functions in the code which can
set such a code are updated to do so, simply by calling the
newly added uw_ethrowf that drop-in replaces for uw_throwf.
* lib.[ch] (string_set_code, string_get_code): New functions.
* unwind.[ch] (uw_ethrowf): New function.
* eval.c (eval_init): Register string-set-code and
string-get-code intrinsics.
* ftw.c (ftw_wrap): Switch to uw_ethrowf.
* parser.c (open_txr_file): Likewise.
* socket.c (dgram_overflow): Store the ENOBUFS error in errno,
and use uw_ethrowf instead uw_throwf.
(dgram_get_byte_callback, dgram_flush, sock_bind, to_connect,
open_sockfd, sock_connect, sock_listen, sock_accept,
sock_shutdown, sock_timeout, socketpair_wrap): Switch to
uw_ethrowf.
* stream.c (dev_null_get_fd, stdio_maybe_read_error,
stdio_maybe_error, stdio_close, pipe_close, open_directory,
open_file, open_fileno, open_tail, fds_subst,
open_subprocess, open_command, remove_path, rename_path,
tmpfile_wrap, mkdtemp_wrap, mkstemp_wrap): Switch to uw_ethrowf.
* sysif.c (mkdir_wrap, ensure_dir, chdir_wrap, getcwd_wrap,
rmdir_wrap, mknod_wrap, mkfifo_wrap, chmod_wrap, do_chown,
symlink_wrap, link_wrap, readlink_wrap, close_wrap, val
exec_wrap, stat_impl, do_utimes, pipe_wrap, poll_wrap,
getgroups_wrap, setuid_wrap, seteuid_wrap, setgid_wrap,
setegid_wrap, setgroups_wrap, getresuid_wrap, setresuid_wrap,
setresgid_wrap, crypt_wrap, uname_wrap, opendir_wrap,
getrlimit_wrap, setrlimit_wrap): Likewise.
* termios.c (tcgetattr_wrap, tcsetattr_wrap, tcsendbreak_wrap,
tcdrain_wrap, tcflush_wrap, tcflow_wrap): Likewise.
* tests/018/errno.tl: New file.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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* unwind.[ch] (uw_errorf): Function removed.
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* Makefile, alloca.h, args.c, args.h, arith.c, arith.h, buf.c,
buf.h, chksum.c, chksum.h, chksums/crc32.c, chksums/crc32.h,
combi.c, combi.h, debug.c, debug.h, eval.c, eval.h, ffi.c,
ffi.h, filter.c, filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c,
glob.h, hash.c, hash.h, itypes.c, itypes.h, jmp.S, lib.c,
lib.h, lisplib.c, lisplib.h, match.c, match.h, parser.c,
parser.h, parser.l, parser.y, rand.c, rand.h, regex.c,
regex.h, signal.c, signal.h, socket.c, socket.h,
stdlib/asm.tl, stdlib/awk.tl, stdlib/build.tl,
stdlib/compiler.tl, stdlib/constfun.tl, stdlib/conv.tl,
stdlib/copy-file.tl, stdlib/debugger.tl, stdlib/defset.tl,
stdlib/doloop.tl, stdlib/each-prod.tl, stdlib/error.tl,
stdlib/except.tl, stdlib/ffi.tl, stdlib/getopts.tl,
stdlib/getput.tl, stdlib/hash.tl, stdlib/ifa.tl,
stdlib/keyparams.tl, stdlib/match.tl, stdlib/op.tl,
stdlib/optimize.tl, stdlib/package.tl, stdlib/param.tl,
stdlib/path-test.tl, stdlib/pic.tl, stdlib/place.tl,
stdlib/pmac.tl, stdlib/quips.tl, stdlib/save-exe.tl,
stdlib/socket.tl, stdlib/stream-wrap.tl, stdlib/struct.tl,
stdlib/tagbody.tl, stdlib/termios.tl, stdlib/trace.tl,
stdlib/txr-case.tl, stdlib/type.tl, stdlib/vm-param.tl,
stdlib/with-resources.tl, stdlib/with-stream.tl,
stdlib/yield.tl, stream.c, stream.h, struct.c, struct.h,
strudel.c, strudel.h, sysif.c, sysif.h, syslog.c, syslog.h,
termios.c, termios.h, time.c, time.h, tree.c, tree.h, txr.c,
txr.h, unwind.c, unwind.h, utf8.c, utf8.h, vm.c, vm.h, vmop.h:
License reformatted.
* lex.yy.c.shipped, y.tab.c.shipped, y.tab.h.shipped: Updated.
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* eval.c (eval_exception): New parameter distinguishes whether
this function is called from expansion time. If so, it behaves
similarly to the compile-error funtion in error.tl: if
a recursive load is in effect, a there is no error handler,
then deferred warnings are dumped to standard error, followed
by the error message. Then the exception is thrown.
(eval_error, eval_warn): Pass zero to eval_exception to
indicate that this is not expansion time.
(expand_error, missing_arg_error, excess_args_error,
no_dot_check, syn_check): New static functions.
(me_def_variable, me_each, me_for, me_gen, me_gun, me_delay,
me_when, me_unless, me_while_until, me_whie_until_star,
me_equot, me_case, me_dotimes, me_lcons, me_mlet,
me_load_time, me_l1_val, me_l1_setq, me_assert): Add syntactic
checks to built-in macros.
(do_expand): Add syntactic checks for a number of special
operators.
* unwind.c (catch_frame_s): New symbol variable.
(uw_late_init): Initialize catch_frame_s and use that in
registering the catch-frame structure.
* unwind.c (catch_frame_s): Declared.
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* arith.c (invalid_ops, invalid_op): Static functions removed.
* unwind.c (invalid_oips, invalid_op): Functions added here,
as external functions.
* unwind.h (invalid_oips, invalid_op): Declared.
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* unwind.h (UW_FRAME_ALIGN): Define on __amd64__, if compiled
by __clang__. This is because MMX instructions are used for
manipulating the stack which require 16 byte alignment.
This was discovered as a bus error crash on OpenBSD in the
tests/012/cont.tl test case, acessing otherwise perfectly
valid memory. The faulting address was only 8 byte aligned,
not 16.
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* METALICENSE: 2020 copyrights bumped to 2021. Added note
about SHA-256 routines from Colin Percival.
* LICENSE, LICENSE-CYG, Makefile, alloca.h, args.c, args.h,
arith.c, arith.h, buf.c, buf.h, cadr.c, cadr.h, chksum.c,
chksum.h, chksums/crc32.c, chksums/crc32.h, combi.c, combi.h,
configure, debug.c, debug.h, eval.c, eval.h, ffi.c, ffi.h,
filter.c, filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c, glob.h,
hash.c, hash.h, itypes.c, itypes.h, jmp.S, lex.yy.c.shipped,
lib.c, lib.h, linenoise/linenoise.c, linenoise/linenoise.h,
lisplib.c, lisplib.h, match.c, match.h, parser.c, parser.h,
parser.l, parser.y, protsym.c, rand.c, rand.h, regex.c,
regex.h, share/txr/stdlib/asm.tl, share/txr/stdlib/awk.tl,
share/txr/stdlib/build.tl, share/txr/stdlib/cadr.tl,
share/txr/stdlib/compiler.tl, share/txr/stdlib/conv.tl,
share/txr/stdlib/copy-file.tl, share/txr/stdlib/debugger.tl,
share/txr/stdlib/defset.tl, share/txr/stdlib/doloop.tl,
share/txr/stdlib/each-prod.tl, share/txr/stdlib/error.tl,
share/txr/stdlib/except.tl, share/txr/stdlib/ffi.tl,
share/txr/stdlib/getopts.tl, share/txr/stdlib/getput.tl,
share/txr/stdlib/hash.tl, share/txr/stdlib/ifa.tl,
share/txr/stdlib/keyparams.tl, share/txr/stdlib/op.tl,
share/txr/stdlib/package.tl, share/txr/stdlib/param.tl,
share/txr/stdlib/path-test.tl, share/txr/stdlib/place.tl,
share/txr/stdlib/pmac.tl, share/txr/stdlib/quips.tl,
share/txr/stdlib/save-exe.tl, share/txr/stdlib/socket.tl,
share/txr/stdlib/stream-wrap.tl, share/txr/stdlib/struct.tl,
share/txr/stdlib/tagbody.tl, share/txr/stdlib/termios.tl,
share/txr/stdlib/trace.tl, share/txr/stdlib/txr-case.tl,
share/txr/stdlib/type.tl, share/txr/stdlib/vm-param.tl,
share/txr/stdlib/with-resources.tl,
share/txr/stdlib/with-stream.tl, share/txr/stdlib/yield.tl,
signal.c, signal.h, socket.c, socket.h, stream.c, stream.h,
struct.c, struct.h, strudel.c, strudel.h, sysif.c, sysif.h,
syslog.c, syslog.h, termios.c, termios.h, time.c, time.h,
tree.c, tree.h, txr.1, txr.c, txr.h, unwind.c, unwind.h,
utf8.c, utf8.h, vm.c, vm.h, vmop.h, win/cleansvg.txr,
y.tab.c.shipped: Copyright year bumped to 2021.
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The noreturn macro is respelled to harmonize with the
upper-case INLINE and NOINLINE.
* lib.h (noreturn): Rename to NORETURN.
* arith.c (not_number, not_integer, invalid_ops, invalid_op):
Declaration updated.
* arith.c (do_mp_error): Likewise.
* eval.c (eval_error, no_bindable_error, dotted_form_error):
Likewise.
* eval.h (eval_error): Likewise.
* lib.c (unsup_obj, callerror, wrongargs): Likewise.
* match.c (sem_error): Likewise.
* stream.c (unimpl, unimpl_put_string, unimpl_put_char,
unimpl_put_byte, unimpl_get_line, unimpl_get_char,
unimpl_get_byte, unimpl_unget_char, unimpl_unget_byte,
unimpl_put_buf, unimpl_fill_buf, unimpl_seek, unimpl_truncate,
unimpl_get_sock_family, unimpl_get_sock_type,
unimpl_get_sock_peer, unimpl_set_sock_peer): Likewise.
* struct.c (no_such_struct, no_such_slot,
no_such_static_slot): Likewise.
* unwind.h (jmp_restore, uw_throw, uw_throwf, uw_errorf,
uw_errorfv, type_mismatch): Likewise.
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* jmp.S (jmp_save, jmp_restore): Defined for MIPS64.
* unwind.h (struct_jmp): Provide same definition for 32 and 64
by #ifdef-ing on just __mips__.
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* jmp.S (jmp_save, jmp_restore): Implement for 32 bit MIPS.
* unwind.h (struct jmp): 32 bit MIPS definition added.
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This patch makes a fundamental change in exception behavior.
Going forward, if an exception that is not derived from
error is not handled (no catch intercepts it, and no handler
accepts it) then the throw call simply returns nil to the
caller instead of unwinding and terminating the process.
For error exceptions, the behavior is the same: the
*uhandled-hook* is called, if it exists, and if it doesn't
exist or returns, unwinding and termination with diagnostics
ensues.
The rationale for not treating non-error exceptions fatally
is that this simplifies the use of code that throws exceptions
for non-error situations like progress updates. The code can
be used without the caller having to establish a handler.
* txr.1: Documentation updates and comaptibility notes.
* unwind.c (uw_rthrow): New returning throw function based on
the implementation of uw_throw.
(uw_rthrowv, uw_rthrowvf): New functions.
(uw_throw): Now a wrapper for uw_rthrow. Because uw_throw
still does not return, it calls abort if uw_rthrow
returns. uw_throw is used internally only for error
exceptions.
(uw_throwv, uw_throwfv): Functions removed.
(uw_late_init): Register throw and throwf to the
new functions uw_rthrowv an uw_rthrowfv.
* unwind.h (uw_rthrow, uw_rthrowv, uw_rthrowfv): Declared.
(uw_throwv, uw_throwfv): Declarations removed.
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This is the seventh round of an effort to enable GCC's -Wextra
option. Warnings about switch fallthrough situations are
addressed. GCC now has a diagnostic for this that is enabled
by -Wextra in such a way that if a fallthrough comment is
present, the diagnostic is suppressed. In much of the code,
we have such a comment. It's missing in a few places, or
misplaced. There are also some real bugs.
* hash.c (hash_buf): Add fallthrough comments to intentional
fallthrough cases.
(hash_hash_op): bugfix: add break statement. The 32 and 64
bit cases are independent (at compile time).
* lib.c (cdr, nullify, list_collect, empty): Add fallthrough
comment.
(int_str): Add missing break. This has not caused a
bug though because setting the octzero flag in the zerox
case is harmless to the logic which follows.
* linenoise.c (edit): Move misplaced fallthrough.
* sysif.c (fcntl_wrap): Bugfix: add missing break, without
which errno is tampered to hold EINVAL, in spite of a
successful F_SETLK, F_SETLKW or F_GETLK operation.
* unwind.h (jmp_restore): Declare noreturn, so that GCC
does not issue a false positive warning about a fallthrough
in uw_unwind_to_exit_point.
* utf8.c (utf8_from_buf, utf8_decode): Move a fallthrough
comment outside of preprocessing, so it is properly processed
by GCC's diagnostic.
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This is the second round of an effort to enable GCC's -Wextra
option. All function parameters that are unused and
are removable are removed. They are eliminated from the
function defintions, declarations, callers, and any related
function pointer variables or structure members.
* arith.c (nary_simple_op): Remove unused self parameter.
See lib.c: maxv, minv.
* chksum.c (crc32_buf, crc32_str): Remove unused self
parameter.
(crc32): Don't pass self to the above functions.
* eval.c (copy_env_handler, copy_bh_env_handler): Remove
unused parent parameter. See unwind.c.
(supplement_op_syms): Remove unused max parameter.
(me_op): Don't pass max to supplement_op_syms.
* lib.c (seq_iter_rewind): Remove unused self parameter.
(lazy_flatten_func): Remove unused env parameter.
(lazy_flatten): Use func_n1 to create non-environment-carrying
funtion out of lazy_flatten_func.
(maxv, minv): Don't pass self parameter to nary_simple_op.
(middle_pivot): Remove unused lessfun param.
(quicksort): Don't pass lessfun to middle_pivot.
(diff, isec): Don't pass self to seq_iter_rewind.
* lib.h (seq_iter_rewind, nary_simple_op): Declarations
updated.
* struct.c (get_super_slots): Remove unused self parameteer.
(make_struct_type): Don't pass self to get_super_slots.
* sysif.c (flock_unpack): Remove unused self parameter.
(fcntl_wrap): Don't pass self to flock_unpack.
* unwind.c (uw_push_cont_copy): Remove parent parameter from
function pointer parameter. See eval.c: copy_env_handler.
(call_copy_handlers): Remove parent parameter and don't
pass that argument to the indirect call via pointer
to the copy handler function.
(revive_cont, capture_cont): Don't pass 0 value to
removed parent parameter of call_copy_handlers.
* unwind.h (struct uw_cont_copy): Function pointer member copy
loses parent parameter.
(uw_push_cont_copy): Declaration updated.
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* LICENSE, LICENSE-CYG, METALICENSE, Makefile, alloca.h, args.c,
args.h, arith.c, arith.h, buf.c, buf.h, cadr.c, cadr.h,
chksum.c, chksum.h, chksums/crc32.c, chksums/crc32.h, combi.c,
combi.h, configure, debug.c, debug.h, eval.c, eval.h, ffi.c,
ffi.h, filter.c, filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c,
glob.h, hash.c, hash.h, itypes.c, itypes.h, jmp.S, lib.c,
lib.h, linenoise/linenoise.c, linenoise/linenoise.h,
lisplib.c, lisplib.h, match.c, match.h, parser.c, parser.h,
parser.l, parser.y, protsym.c, rand.c, rand.h, regex.c,
regex.h, share/txr/stdlib/asm.tl, share/txr/stdlib/awk.tl,
share/txr/stdlib/build.tl, share/txr/stdlib/cadr.tl,
share/txr/stdlib/compiler.tl, share/txr/stdlib/conv.tl,
share/txr/stdlib/debugger.tl, share/txr/stdlib/defset.tl,
share/txr/stdlib/doloop.tl, share/txr/stdlib/error.tl,
share/txr/stdlib/except.tl, share/txr/stdlib/ffi.tl,
share/txr/stdlib/getopts.tl, share/txr/stdlib/getput.tl,
share/txr/stdlib/hash.tl, share/txr/stdlib/ifa.tl,
share/txr/stdlib/keyparams.tl, share/txr/stdlib/op.tl,
share/txr/stdlib/package.tl, share/txr/stdlib/param.tl,
share/txr/stdlib/path-test.tl, share/txr/stdlib/place.tl,
share/txr/stdlib/pmac.tl, share/txr/stdlib/save-exe.tl,
share/txr/stdlib/socket.tl, share/txr/stdlib/stream-wrap.tl,
share/txr/stdlib/struct.tl, share/txr/stdlib/tagbody.tl,
share/txr/stdlib/termios.tl, share/txr/stdlib/trace.tl,
share/txr/stdlib/txr-case.tl, share/txr/stdlib/type.tl,
share/txr/stdlib/vm-param.tl,
share/txr/stdlib/with-resources.tl,
share/txr/stdlib/with-stream.tl, share/txr/stdlib/yield.tl,
signal.c, signal.h, socket.c, socket.h, stream.c, stream.h,
struct.c, struct.h, strudel.c, strudel.h, sysif.c, sysif.h,
syslog.c, syslog.h, termios.c, termios.h, tree.c, tree.h,
txr.1, txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h, vm.c,
vm.h, vmop.h, win/cleansvg.txr: Extended copyright notices
to 2020.
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* gc.c: Include "unwind.h" for jmp_buf.
* signal.h (struct jmp): All versions removed from here.
(jmp_save, jmp_restore): Declarations removed from here.
(EJ_DBG_MEMB): Macro removed.
(extended_jmp_buf): Struct type removed.
(extended_setjmp, extended_longjmp): Macros removed.
(extjmp_save, extjmp_restore): Declarations removed.
* unwind.h (struct jmp): Declared here.
(jmp_save, jmp_restore): Declared here.
(EJ_DBG_MEMB): Macro moved here.
(extended_jmp_buf): Struct type moved here.
(extended_setjmp, extended_longjmp): Declared here.
(extjmp_save, extjmp_restore): Declared here.
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Convenience function for throwing warnings.
* unwind.c (uw_warningf): New function.
* unwind.h (uw_warningf): Declared.
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This patch adds special unwind frames for backtracing
expansions. With this, we can get rid of the global variable
last_form_expanded, since to get the last form expanded, we
just search for the most enclosing expand frame.
* eval.c (last_form_expanded): Global variable removed.
(error_trace): Use uw_last_form_expanded() instead of
last_form_expanded.
(expand_eval): No need to save and restore
last_form_expanded any more.
(expand_lisp_setq, expand_setqf, expand_lisp1, do_expand): Use
uw_last_form_expanded().
(expand, do_macroexpand_1): Push and pop expand frame.
This fixes a bug: do_macroexpand_1 was not recording
last_form_expanded. Evaluation of top-level forms uses
explicit macroexpansion, therefore top-level evaluation was
neglecting to set last_form_expanded.
This explains weird behavior I saw in the listener from
time to time, when errors would report against the expansion
of the wrong form.
(eval_init): Remove reference to last_form_expanded variable.
* eval.h (last_form_expanded): Declaration removed.
* share/txr/stdlib/debug.tl (expand-frame print-trace,
expand-frame loc): New methods.
(print-backtrace): Include uw-expand frames in the backtrace.
* unwind.c (expand_frame_type): New static variable.
(uw_find_frames_by_mask): Handle UW_EXPAND.
(uw_last_form_expanded, uw_push_expand): New functions.
(uw_late_init): Register expand-frame struct type.
* unwind.h (enum uw_frtype): New enum member, UW_EXPAND.
(uw_last_form_expanded, uw_push_expand): Declared.
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We introduce evaluation tracking frames. The backtrace
function can use these to deduce the line from which
a function is called (if called from interpreted code).
Eventually we will have analogous virtual machine
frames to do this for compiled code.
* eval.c (do_eval): If backtraces are enabled, then push
and pop an eval frame, which holds the two key pieces: the
form and environment.
* share/txr/stdlib/debug.tl ((fcall-frame loc), (fcall-frame
print-trace), (eval-frame loc), (eval-frame print-trace)):
New methods.
(print-backtrace): Loop reduced to just dispatching
frame-specific print-trace methods. It gives the previous and
next frame to each method.
The (fcall-frame print-trace) method prints function frames,
using the previous form to deduce the location from which
the function is called. The (eval-frame print-trace) method
mostly suppresses the printing of eval frames. We print
an eval frame if it is the parent of an internal function
frame, and if it is the topmost frame (to identify the
toplevel form at the root of the backtrace).
* unwind.c (form_s): New symbol variable.
(eval_frame_type): New static variable.
(uw_find_frames_by_mask): Handle UW_EVAL case, producing
eval-frame struct.
(uw_push_eval): New function.
(uw_late_init): Allocate eval-frame struct type, storing it in
eval_frame_type, and gc-protect that new variable.
Register uw-eval variable evaluating to a one bit mask
with the UW_EVAL-th bit set.
* unwind.h (enum uw_frtype): New enum constant UW_EVAL.
(struct uw_eval): New struct type.
(union uw_frame): New member, el.
(uw_push_eval): Declared.
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* debug.c (debug_state): Switch to unsigned, since this is now
a bitmask.
(sys_print_backtrace_s): New symbol variable.
(dbg_clear, dbg_set, dbg_restore): New static functions.
(debug_init): Initialize sys_print_backtrace_s. Register
dbg-clear, dbg-set, dbg-restore intrinsics. Register
dbg-enable, dbg-step, dbg-backtrace and dbg-all bitmask
variables, Lisp equivalents of DBG_ENABLE, DBG_SETP,
DBG_BACKTRACE and DBG_ALL.
(debug_dump_backtrace): New function.
* debug.h (opt_debugger): Declaration removed.
(debug_state): Declaration updated.
(DBG_ENABLE, DBG_STEP, DBG_BACKTRACE, DBG_ALL): New
preprocessor symbols.
(debug_set_state): Inline function removed.
(debug_clear, debug_set, debug_restore): New inline functions.
(dbg_backtrace, dbg_fcall_begin, dbg_fcall_end): New macros.
(debug_dump_backtrace): Declared.
* eval.c (error_trace): Invoke debug_dump_backtrace if support
is compiled in and backtraces are enabled.
* lib.c (do_generic_funcall): New function, copy of
generic_funcall.
(generic_funcall): Now a wrapper for do_generic_funcall which
registers fcall frames if backtrace support is enabled.
(funcall, funcall1, funcall2, funcall3, funcall4): Route to
slow generic_funcall path if backtraces are enabled.
* lisplib.c (debugger_instantiate, debugger_set_entries):
New static functions.
(lisplib_init): Autload support for debug module via above
new functions.
(lisplib_try_load): Save and restore debugger state in new
way using debug_set and debug_restore, with specific mask
values.
* parser.y (parse_once): Disable debugging in new way.
* share/txr/stdlib/debug.tl New file.
* sighal.h (EJ_DBG_MEMB, EJ_DBG_SAVE, EJ_DBG_REST): New
macros for saving/restoring debug state.
(EJ_OPT_MEMB, EJ_OPT_SAVE, EJ_OPT_REST): Reference the above
macros to include debug state in extended jump context.
* txr.c (help): Document --backtrace and that that -d
implies --backtrace.
(txr_main): Enable debugger using debug_set.
Provide new --backtrace option to enable backtraces only.
* unwind.c (args_s): New symbol variable.
(fcall_frame_type): New static variable.
(unwind_to_exit_point): Save pointer to original frame stack
and restore it when calling error_trace. This is so that
error_trace can walk the stack to collect a backtrace.
(uw_find_frames_by_mask, uw_push_fcall): New functions.
(uw_late_init): Initialize args_s and fcall_frame_type.
gc-protect fcall_frame_type. Register uw-* variables
corresponding to the UW_* frame types.
* unwind.h (uw_frtype_t): New enum constant UW_FCALL.
(struct uw_fcall): New frame structure.
(union uw_frame): New member fc.
(uw_push_fcall, uw_find_frames_by_mask): Declared.
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Errors encountered when parsing or evaluating a source file
should be handled using a handler rather than a catch, so that
the unwind stack is available to the error reporting function.
This anticipates being able to dump a backtrace.
* txr.c (parse_once_noerr, read_eval_stream_noerr): Adjust
to reduced argument count in ignerr_func_body macro.
* unwind.c (uw_trace_error): New function.
* unwind.h (uw_trace_error): Declared.
(ignerr_func_body): Revised to establish a handler in addition
to the catch. The catch now doesn't do anything other than
provide an intercepting exit point; the error_trace call is
moved into the handler, and so it executes in a context where
unwinding hasn't happened yet.
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* eval.c (op_catch): Extra argument in sys:catch syntax
specifies an expression that evaluates to a description
field.
(expand_catch): Expand the desc expression in sys:catch
syntax.
* parser.c (read_file_common): Increase acceptance of compiled
files from versions 1-4 to 1-5, since we are now marking
compiled files with version 5.0 rather than 4.0.
* share/txr/stdlib/asm.tl (op-catch catch): Support new
argument in the opcode syntax. Turns out we have a spare field
in the instruction format which was previously set to zero
We can use that for the description. Thus, the instruction
set and VM remain backward compatible: old code works.
* share/txr/stdlib/compiler.tl (compiler comp-catch): Handle
the desc argument introduced into the sys:catch form.
We must compile it as an expression, then inject the code into
the instruction template, and reference the output register of
that code block in the catch instruction.
(%tlo-ver%): Bump up the compiled file version to 5.0.
* share/txr/stdlib/except.tl (usr:catch, catch*): Add desc
argument to generated sys:catch form, specifying it as nil.
* unwind.c (desc_s): New symbol variable.
(uw_find_frames_impl): Set the desc member of the extracted
catch structure from the corresponding field in the catch
frame.
(uw_late_init): Initialize desc_s with interned symbol.
Add desc slot to catch-frame type.
* unwind.h (struct uw_catch): New member, desc.
(uw_catch_begin_w_desc): New macro.
* vm.c (vm_catch): Extract the desc field from the catch
instruction, and use uw_catch_begin_w_desc to propagate that
to the catch frame.
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* debug.c (debug_depth, debug_quit_s): Variables removed.
(step_mode, next_depth, breakpoints, last_command, cols):
Static variables removed.
(debug_check): C99 inline instantiation removed.
(help, show_bindings): Static functions removed.
(debug): Function removed.
(debug_set_state): Now takes one int argument, returns int.
It's anticipated that the new debug system will have a
simple on-off switch; there won't be a debug_depth hack.
(debug_restore_state): Function removed.
(debug_init): Emptied.
* debug.h (debug_depth, debug_state_t): Declarations removed.
(debug_enter, debug_leave, debug_return): Macros removed.
(debug_check): Inline function removed.
(debug_set_state): Declaration updated.
(debug_restore_state): Declaration removed.
(debug_frame, debug_end): Macros removed.
* eval.c (do_eval, me_interp_macro): Debugging support scrubbed.
* lisplib.c (lisplib_try_load): Adapt to debug_set_state
interface change.
* match.c (h_fun, do_match_line, v_fun, match_files,
match_fun): Debugging support scrubbed.
* parser.y (parse_once): Adapt to debug_set_state interface
change.
* protsym.c: Regenerated.
* signal.h (debug_depth): Declaration removed.
(EJ_DBG_MEMB, EJ_DBG_SAVE, EJ_DBG_REST): Macros removed.
(EJ_OPT_MEMB, EJ_OPT_SAVE, EJ_OPT_REST): Reduced to
unconditionally empty definitions for future use.
* unwind.c (uw_push_debug): Function removed.
* unwind.h (uw_frtype_t): UW_DBG enum member removed.
(struct uw_debug): struct declaration removed.
(union uw_frame): db member removed.
(uw_push_debug): Declaration removed.
* txr.1: Debugger doc removed.
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Unwind frames of type ENV exist for the sake of the pattern
language. Let's rename them accordingly.
* match.c (tleval, tleval_progn, h_fun, tx_subst_vars, v_bind,
v_output, v_filter, v_fun): Occurrences of the macros
uw_env_begin and uw_env_end are renamed.
* unwind.c (uw_env_stack): Renamed to uw_menv_stack.
(uw_unwind_to_exit_point, uw_abscond_to_exit_point,
uw_find_env, uw_pop_frame, revive_cont): Follow
rename of UW_ENV to UW_MENV and uw_env_stack to uw_menv_stack.
(uw_push_env): Renamed to uw_push_match_env, and updated to
follow renames.
* unwind.h (enum uw_frtype, uw_frtype_t): UW_ENV renamed
to UW_MENV.
(uw_push_env): Renamed to uw_push_match_env.
(uw_env_begin, uw_env_end): Renamed to uw_match_env_begin an
uw_match_env_end.
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* LICENSE, LICENSE-CYG, METALICENSE, Makefile, args.c, args.h,
arith.c, arith.h, buf.c, buf.h, cadr.c, cadr.h, combi.c,
combi.h, configure, debug.c, debug.h, eval.c, eval.h, ffi.c,
ffi.h, filter.c, filter.h, ftw.h, gc.c, gc.h, glob.c, glob.h,
hash.c, hash.h, itypes.c, itypes.h, jmp.S, lib.c, lib.h,
lisplib.c, lisplib.h, match.c, match.h, parser.c, parser.h,
parser.l, parser.y, protsym.c, rand.c, rand.h, regex.c,
regex.h, share/txr/stdlib/asm.tl, share/txr/stdlib/awk.tl,
share/txr/stdlib/build.tl, share/txr/stdlib/cadr.tl,
share/txr/stdlib/compiler.tl, share/txr/stdlib/conv.tl,
share/txr/stdlib/doloop.tl, share/txr/stdlib/error.tl,
share/txr/stdlib/except.tl, share/txr/stdlib/ffi.tl,
share/txr/stdlib/getopts.tl, share/txr/stdlib/getput.tl,
share/txr/stdlib/hash.tl, share/txr/stdlib/ifa.tl,
share/txr/stdlib/keyparams.tl, share/txr/stdlib/op.tl,
share/txr/stdlib/package.tl, share/txr/stdlib/path-test.tl,
share/txr/stdlib/place.tl, share/txr/stdlib/pmac.tl,
share/txr/stdlib/socket.tl, share/txr/stdlib/stream-wrap.tl,
share/txr/stdlib/struct.tl, share/txr/stdlib/tagbody.tl,
share/txr/stdlib/termios.tl, share/txr/stdlib/trace.tl,
share/txr/stdlib/txr-case.tl, share/txr/stdlib/type.tl,
share/txr/stdlib/vm-param.tl, share/txr/stdlib/with-resources.tl,
share/txr/stdlib/with-stream.tl, share/txr/stdlib/yield.tl,
signal.c, signal.h, socket.c, socket.h, stream.c, stream.h,
struct.c, struct.h, strudel.c, strudel.h, sysif.c, sysif.h,
syslog.c, syslog.h, termios.c, termios.h, txr.1, txr.c, txr.h,
unwind.c, unwind.h, utf8.c, utf8.h, vm.c, vm.h, vmop.h,
win/cleansvg.txr: Extended Copyright line to 2018.
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Now that the compiler has a more efficient treatment of global
lexical variables, code which accesses global variables that
have not yet been defined will misbehave if the intent is to
for those variables to be dynamically scoped.
There is such a bug in the op expander, in fact.
* eval.c (me_def_variable): When defvar/defparm are expanding,
they now check whether there is an outstanding unbound warning
against the variable. If so, then a warning is issued that the
variable was previously used lexically and is now being marked
special.
* unwind.c (uw_warning_exists): New function.
* unwind.h (uw_warning_exists): Declared.
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The new abstraction layer used by linenoise throws exceptions,
but linenoise excpects a null pointer when a file open fails.
* parser.c (lino_open, lino_open8): Catch error exceptions
and convert to null return, using new macros to reduce
repetitive coding.
* unwind.h (ignerr_begin, ignerr_end): New macros.
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It doesn't Just Work out of the box. Here is why.
The struct vm state is declared somewhere on the stack,
and then the vm executes various recursive functions.
A block is established by vm_block(). Then if a continuation
is captured up to that block, it will not include that part
of the stack which holds the VM state. When the continuation
is restarted, the struct vm * pointers inside the stack will
be garbage.
The solution: when a continuation is captured to a prompt that
is set up by the VM block instruction (vm_block function),
we put information into the block which says "don't just
capture me plus some slack: please capture the stack all the
way up to this specific address here". That address, of
course, is just past the VM state, ensuring that the VM state
is included in the snapshot.
In short: a delimited continuation terminating in a prompt
set up by the VM just include the entire VM context from the
stack frame where the struct vm on down (i.e. up the stack)
to the capture point.
* unwind.c (uw_push_block): Initialize cont_bottom
member to zero. Interpreted blocks leave this as zero.
Blocks set up by the VM override it.
(revive_cont): Critical: the range check must include
the orig_end endpoint, because when the struct vm is captured
into the continuation it is right at the end of the capture
memory, and the prompt block's cont_bottom member points
exactly to orig_end: one element past the struct vm.
The cont_bottom member must be adjusted by delta
so that continuations captured by the revived VM
inside the continuation get the adjusted cont_bottom at their
current stack location.
(capture_cont): If the block is publishing a non-zer
cont_bottom value, then take that value if it is a higher
address than the lim (including the UW_CONT_FRAME_AFTER
slack).
* unwind.h (struct uw_block): New member, cont_bottom.
By means of this, a block can indicate a higher address
to which a continuation capture can extend.
* vm.c (vm_block): Publish the address one byte past the
virtual machine state as the stack bottom for continuations.
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* LICENSE, LICENSE-CYG, METALICENSE, Makefile, args.c, args.h,
arith.c, arith.h, buf.c, buf.h, cadr.c, cadr.h, combi.c,
combi.h, configure, debug.c, debug.h, eval.c, eval.h, ffi.c,
ffi.h, filter.c, filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c,
glob.h, hash.c, hash.h, itypes.c, itypes.h, jmp.S, lib.c,
lib.h, lisplib.c, lisplib.h, match.c, match.h, parser.c,
parser.h, parser.l, parser.y, protsym.c, rand.c, rand.h,
regex.c, regex.h, share/txr/stdlib/awk.tl,
share/txr/stdlib/build.tl, share/txr/stdlib/cadr.tl,
share/txr/stdlib/conv.tl, share/txr/stdlib/doloop.tl,
share/txr/stdlib/error.tl, share/txr/stdlib/except.tl,
share/txr/stdlib/ffi.tl, share/txr/stdlib/getopts.tl,
share/txr/stdlib/getput.tl, share/txr/stdlib/hash.tl,
share/txr/stdlib/ifa.tl, share/txr/stdlib/keyparams.tl,
share/txr/stdlib/op.tl, share/txr/stdlib/package.tl,
share/txr/stdlib/path-test.tl, share/txr/stdlib/place.tl,
share/txr/stdlib/pmac.tl, share/txr/stdlib/socket.tl,
share/txr/stdlib/stream-wrap.tl, share/txr/stdlib/struct.tl,
share/txr/stdlib/tagbody.tl, share/txr/stdlib/termios.tl,
share/txr/stdlib/txr-case.tl, share/txr/stdlib/type.tl,
share/txr/stdlib/with-resources.tl,
share/txr/stdlib/with-stream.tl, share/txr/stdlib/yield.tl,
signal.c, signal.h, socket.c, socket.h, stream.c, stream.h,
struct.c, struct.h, strudel.c, strudel.h, sysif.c, sysif.h,
syslog.c, syslog.h, termios.c, termios.h, txr.1, txr.c, txr.h,
unwind.c, unwind.h, utf8.c, utf8.h, win/cleansvg.txr:
Extended Copyright line to 2018.
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If an error is thrown while parsing a .txr file
or while reading and evaluating the forms of a .tl
file.
* parser.y (parse_once, parse): Wording change in message when
exception is caught. Only exceptions derived from error are
caught.
* txr.c (parse_once_noerr, read_eval_stream_noerr): New static
functions.
(txr_main): Use parse_once_noerr and read_eval_stream_noerr
instead of parse_once and read_eval_stream.
Don't exit if a TXR file has parser errors; in that situation,
exit only if interactive mode is not requested, otherwise
go interactive. Make sure *self-path* is registered to the
name of the input source in this case also.
* unwind.h (ignerr_func_body): New macro.
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* unwind.c (UW_CONT_FRAME_BEFORE, UW_CONT_FRAME_AFTER): New
preprocessor symbols.
(revive_cont): The "frame slack" zero-filled padding logic
is replaced by capturing an actual part of the real stack
before the uw_stack unwind frame. On aarch64, there is
content there we must actually capture. Experiment shows
that exactly 128 bytes is enough, and that corresponds to
the frame_slack value.
(capture_cont): Capture UW_CONT_FRAME_BEFORE bytes before
the uw_stack unwind frame location. Also, the "capture_extra"
is replaced by UW_CONT_FRAME_AFTER constant, to harmonize.
* unwind.h (UW_FRAME_ALIGN): New preprocessor symbol.
(union uw_frame): On aarch64, we ask the compiler, via
a GCC-specific attribute syntax, to align the address of
frame objects to a 16 byte boundary. This solves a crash
in the continuation code. Continuation capture is keyed
to unwind frame addresses. When a captured continuation is
revived onto the stack, the delta between its original address
and the revive address must be a multiple of 16. The reason
is that this preserves the stack and frame pointer alignment.
Certain instructions on the aarch64, require the stack pointer
to be 16 byte aligned. There are other ways we could achieve
this, but the easiest is to align the original frames to 16
bytes.
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When setting up a handler frame, we note down the current
package alist and package in the frame. Then when invoking the
handler, we rebind the *package* and *package-alist* special
variables.
This is a needed security measure for sandboxing. Since
handlers do not unwind (and therefore do not restore special
variables) a handler in sandboxed code could catch an
exception from non-sandboxed code that has changed *package*
or *package-alist*, and take advantage of those changed
values to escape from the sandbox.
* unwind.c (uw_push_handler): Store current package and
package-alist into new fields in the handler frame.
(invoke_handler): Set up a new dynamic environment and
bind *package* and *package-alist* around the handler
call, to the values noted in the frame. Thus the handler
executes with whatever package context was current when
the handler was established.
* unwind.h (struct uw_handler): New members, package and
package_alist.
* txr.1: Add paragraph to Exception Handling about this
issue.
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Deferrable warnings now get their own subtype, defr-warning.
The tag is a regular argument: no funny dotted argument list.
* eval.c (eval_defr_warn): Throw new style deferrable warning.
(me_op, no_warn_expand): Catch defr-warning rather than
warning. Use uw_muffle_warning to suppress it.
(gather_free_refs): Parse new representation of deferrable
warning.
(expand_with_free_refs): Catch defr-warning rather than
warning.
* lib.c (defr_warning_s): New symbol variable defined.
(obj_init): Initialize defr_warning_s.
* lib.h (defr_warning_s): Declared.
* share/txr/stdlib/error.tl (compile-defr-warning): Throw
new-style deferrable warning.
* unwind.c (uw_muffle_deferrable_warning): Function removed.
(uw_throw): Bugfix: handle warnings by checking by subtype
rather than exactly for the warning type. Distinguish
deferrable warnings by subtype rather than argument list
shape.
(uw_defer_warning): Take the new style args and reconstruct
the (msg . tag) representation for a deferred warning, so
the other functions don't have to change.
(uw_late_init): Register defr-warning as exception subtype
of warning.
* unwind.h (uw_muffle_deferrable_warning): Decl removed.
* txr.1: Adjusted all documentation touching on the subject
of the representation of deferrable warnings.
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We should be re-throwing deferred warnings as ordinary
warnings, not dumping them to a stream.
* eval.c (eval_exception): Use uw_release_deferred_warnings
instead of uw_dupm_deferred_warnings.
(load): Likewise.
* parser.c (read_eval_ret_last): Likewise.
* txr.c (txr_main): Likewise.
* unwind.c (uw_release_deferred_warnings): New function.
* unwind.h (uw_release_deferred_warnings): Declared.
* txr.1: Documented release-deferred-warnings and updated
documentation for dump-deferred-warnings.
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The problem is that if some macrology is performing its own
expansion with sys:expand, and if all warnings are muffled in
sys:expand, it means that some warnings will never be seen.
Expansion is the last chance to produce warnings issued by
macros. Once they are expanded, a redundant expansion pass
won't issue the warnings any more.
* eval.c (no_warn_expand); Use the
uw_muffle_deferrable_warning handler isntead of
uw_muffle_warnings.
* unwind.c (uw_muffle_deferrable_warning): New function.
* unwind.h (uw_muffle_deferrable_warning): Declared.
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* LICENSE, LICENSE-CYG, METALICENSE, Makefile, args.c, args.h,
arith.c, arith.h, cadr.c, cadr.h, combi.c, combi.h, configure,
debug.c, debug.h, eval.c, eval.h, filter.c, filter.h, ftw.c,
ftw.h, gc.c, gc.h, glob.c, glob.h, hash.c, hash.h, jmp.S,
lib.c, lib.h, lisplib.c, lisplib.h, match.c, match.h,
parser.c, parser.h, parser.l, parser.y, rand.c, rand.h,
regex.c, regex.h, signal.c, signal.h, stream.c, stream.h,
struct.c, struct.h, sysif.c, sysif.h, syslog.c, syslog.h,
termios.c, termios.h, txr.1, txr.c, txr.h, unwind.c, unwind.h,
utf8.c, utf8.h, share/txr/stdlib/awk.tl,
share/txr/stdlib/build.tl, share/txr/stdlib/cadr.tl,
share/txr/stdlib/conv.tl, share/txr/stdlib/except.tl,
share/txr/stdlib/getopts.tl, share/txr/stdlib/getput.tl,
share/txr/stdlib/hash.tl, share/txr/stdlib/ifa.tl,
share/txr/stdlib/package.tl, share/txr/stdlib/path-test.tl,
share/txr/stdlib/place.tl, share/txr/stdlib/socket.tl,
share/txr/stdlib/struct.tl, share/txr/stdlib/tagbody.tl,
share/txr/stdlib/termios.tl, share/txr/stdlib/txr-case.tl,
share/txr/stdlib/type.tl, share/txr/stdlib/with-resources.tl,
share/txr/stdlib/with-stream.tl, share/txr/stdlib/yield.tl:
Add 2017 to all copyright headers and strings.
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Tentative defs record the fact that some definition has been
seen at expansion time, even though that definition has not
been put into effect. They suppress warnings.
* unwind.c (tentative_defs): New static variable.
(uw_defer_warning): Throw away the warning if
it matches a tentative def.
(uw_register_tentative_def, uw_tentative_def_exists): New
functions.
(uw_dump_deferred_warnings): Purge the tag from the list of
deferred defs also.
(uw_init): gc-protect tentative_defs.
Register intrinsics register-tentative-def and
tentative-def-exists.
* unwind.h (uw_register_tentative_def,
uw_tentative_def_exists): Declared.
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Warnings about undefined functions and variables are now
deferred during loading, so forward references do not generate
nuisance diagnostics.
* eval.c (load_recursive_s): New symbol variable.
(eval_defr_warn): New static function.
(op_defvarl, op_defun): Purge any deferred warning about the
given function or variable not being defined.
(load): Rebind the sys:*load-recursive* special var to true
around the load. After the load, dump deferred warnings
if the prior binding of sys:*load-recursive* is false.
Discard deferred warnings in the case of termination by
a nonlocal control transfer.
(do_expand): Treat unbound vars and functions as deferrable
warnings, specially tagged for individual purging frkm
the deferred list.
(eval_init): Intern sys:*load-recursive* and initialize
load_recursive_s variable.
* eval.h (load_recursive_s): Declared.
* parse.c (repl_warning): Accept variable arguments.
Check whether we are loading and if so, defer deferrable
(repl): Adjustment for altered signature of repl_warning.
warnings.
* txr.c (txr_main): dump deferred warnings after
evaluating Lisp stream.
* unwind.c (deferred_warnings): New static variable.
(uw_throw): When a deferrable warning is caught,
suppress the usual message and add it to the
deferred_warnings list.
(uw_defer_warning, uw_dump_deferred_warnings,
uw_dump_deferred_warnings, uw_purge_deferred_warnings): New
functions.
(uw_late_init): gc-protect deferred_warnings.
* unwind.h (uw_defer_warning, uw_dump_deferred_warnings,
uw_dump_deferred_warnings, uw_purge_deferred_warnings): New
functions declared.
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* unwind.c (uw_find_frames_impl): New static function, made
from uw_find_frame.
(uw_find_frame): Reduced to wrapper around
uw_find_frames_impl.
(uw_find_frames): New function.
(uw_late_init): Register find-frames intrinsic.
* unwind.h (uw_find_frames): Declared.
* txr.1: Documented.
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* eval.c (warning_continue): Static function removed.
(no_warn_expand): Use uw_muffle_warning instead of
removed function.
* parser.y (warning_continue): Static function removed.
(parse_once): Use uw_muffle_warning instead of
removed function.
* unwind.c (uw_muffle_warning): New function.
* unwind.h (uw_muffle_warning): Declared.
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We have a bug in that when an exception occurs in a context
called from obj_print, the guard for stopping continuation
captures across obj_print also unintentially blocks the
unwinding. Let's make the unwinding blockage optional
* unwind.c (uw_unwind_to_exit_point): If a UW_GUARD is
encountered, do not abort if the uw_ok flag is set;
keep unwinding.
(uw_push_guard): New uw_ok argument, initializes the
uw_ok member of a guard frame.
* unwind.h (struct uw_guard): New struct type.
(union uw_frame): New member gu of type struct uw_guard.
(uw_push_guard): Declaration updated.
* ftw.c (ftw_callback): Pass zero as new uw_push_guard
argument: no unwinding across the POSIX library function ftw.
* glob.c (errfunc_thunk): Likewise, no unwinding across
the library function glob.
* lib.c (obj_print): Pass 1 as new uw_push_guard argument:
continuations can't be captured, but unwinding is okay.
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* Makefile, args.c, args.h, arith.c, arith.h, cadr.c, cadr.h, combi.c,
combi.h, configure, debug.c, debug.h, eval.c, eval.h, filter.c,
filter.h, ftw.c, ftw.h, gc.c, gc.h, glob.c, glob.h, hash.c, hash.h,
jmp.S, lib.c, lib.h, lisplib.c, lisplib.h, match.c, match.h, parser.c,
parser.h, parser.l, parser.y, rand.c, rand.h, regex.c, regex.h,
share/txr/stdlib/awk.tl, share/txr/stdlib/build.tl,
share/txr/stdlib/cadr.tl, share/txr/stdlib/conv.tl,
share/txr/stdlib/except.tl, share/txr/stdlib/hash.tl,
share/txr/stdlib/ifa.tl, share/txr/stdlib/path-test.tl,
share/txr/stdlib/place.tl, share/txr/stdlib/socket.tl,
share/txr/stdlib/struct.tl, share/txr/stdlib/termios.tl,
share/txr/stdlib/txr-case.tl, share/txr/stdlib/type.tl,
share/txr/stdlib/with-resources.tl, share/txr/stdlib/with-stream.tl,
share/txr/stdlib/yield.tl, signal.c, signal.h, socket.c, socket.h,
stream.c, stream.h, struct.c, struct.h, sysif.c, sysif.h, syslog.c,
syslog.h, termios.c, termios.h, txr.1, txr.c, txr.h, unwind.c,
unwind.h, utf8.c, utf8.h: Revert to verbatim 2-Clause BSD.
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* lib.c (panic_s): New symbol variable.
(obj_init): Initialize panic_s.
* lib.h (panic_s): Declared.
* unwind.c (uw_init): Register panic exception.
* unwind.h (panic): New macro.
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* glob.c (s_exit_point): New static variable.
(errfunc_thunk): Set up a continuation guard frame, so
the error function cannot capture a continuation across
glob's stack frames. Intercept all unwinding with
a simple unwind block, save the exit point in the
global variable and then stop the unwinding by
setting the unwind frame's exit point to null.
(glob_wrap): Check for glob being re-entered and
throw error if so. If the glob callback bailed due
to unwinding (as seen by a non-null value in the
exit point global variable), clean up the glob memory
with globfree and continue the unwinding to the
exit point.
unwind.h (uw_curr_exit_point): New macro for accessing
saved exit point in pure unwind frame.
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