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* Copyright year bump 2021.Kaz Kylheku2021-01-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* warning cleanup: empty do/while style.Kaz Kylheku2020-04-051-2/+2
| | | | | | | | | | This is the fifth round of an effort to enable GCC's -Wextra option. * signal.h (sig_save_enable, sig_save_disable): Fix the compiler warning about do ; while (0) benefiting from braces around the empty statement. I agree with this; I was momentarily confused myself by that semicolon.
* Copyright year bump 2020.Kaz Kylheku2019-12-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Move jmp-related stuff from signal.h to unwind.h.Kaz Kylheku2019-12-171-170/+0
| | | | | | | | | | | | | | | | | | * 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.
* bugfix: crash in extended_setjmp due to PIE.Kaz Kylheku2019-12-171-55/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A crash occurs on Ubuntu 18.04, 32 bit x86, when executing the test case tests/007/except-2.txr, whereby TXR segfaults in the v_try function. This is reminiscent of a January, 2016 report in the txr-users mailing list from Morit Barsnick, who also ran into a crash in the same test case. Background: it appears that the compiler in Ubuntu 18.04 enables PIE (position-independent executables) by default. Thus even simple executables that are not shared libraries reference their own global variables through an offset table, instead of direct addressing. To access globals, the compiler has to emit code that retrieves their addresses from a table, pulling them into a register, and then performing indirect memory accesses through the register. Sometimes the emitted code doesn't keep these addresses in a register. The address of a global variable accessed multiple times in a block of code may get spilled from a register into the stack, and then later retrieved from the stack again to access that same global. In our extended_setjmp logic, we save the values of a few global variables and restore them if the extended_longjmp takes place to return to that point. The problem is that when restoring some of the globals, the compiler is relying on retrieving the effective addresses from the temporary spill locations in the stack. However, those temporary locations have since been re-used for other purposes and the access to the globals therefore crashes or produces unpredictable results. Essentially, it's as if GCC did this around our code: { unsigned *debug_enable_addr = &debug_enable; /* save and restore logic here uses *debug_enable_addr * to refer to debug_enable */ if (extended_setjmp(...)) ... } /* Oops, debug_enable_addr is now garbage! * We are jumping back into the scope which will try to use * its value to restore the debug_enable global. */ extended_longjmp(...); I have experimented with a few approaches that did not work, and settled on moving the code which saves and restores the globals into functions. GCC will not cache the effective address calculation of a global variable access between calls to different external functions which access that variable. The mitigation in this commit gets the test cases to pass even if TXR is compiled with PIE. However, PIE should be disabled. Not only does it cause the above problem, but it has a huge performance impact: a more than 16% slowdown, which is quite unacceptable. * eval.h (dyn_env): Delare here. Some sources were depending on signal.h providing this, which is wrong. Now signal.h doesn't declare it any longer. * signal.h (EJ_DBG_SAVE, EJ_DBG_REST): Macros removed. (extended_setjmp): Greatly simplified. Extended restoring logic is now done in extended_longjmp, and the extended save for the globals is a function call. Just moving the restore into extended_longjmp probably would have fixed this issue. (extended_longjmp): Call extjmp_restore. (extjmp_save, extjmp_restore): Declared. * unwind.c (extjmp_save, extjmp_restore): New functions.
* debugger: initial backtrace support.Kaz Kylheku2019-04-161-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* debug support: crude debugger removed.Kaz Kylheku2019-04-091-14/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Copyright year bump 2019.Kaz Kylheku2019-01-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Copyright year bump 2018.Kaz Kylheku2018-02-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Port to aarch64 (ARM 8).Kaz Kylheku2017-08-161-0/+30
| | | | | | | | | | | | Continuations don't work yet. * gc.c (STACK_TOP_EXTRA_WORDS): New macro. (mark): On aarch64, we must include four words above the stack top. Some live root pointers sometimes hide there which are not in any of the callee-saved register that end up in the machine context via jmp_save. * jmp.S (jmp_save, jmp_restore): Implement for aarch64.
* Bump copyright year to 2017.Kaz Kylheku2017-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Synchronize license comments with LICENSE.Kaz Kylheku2016-10-011-16/+17
| | | | | | | | | | | | | | | | | | | | * 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.
* Port exception handling to 64 bit Cygwin.Kaz Kylheku2016-08-061-0/+4
| | | | | | | | | | | | | * jmp.S (DEFUN): Separate definition for 64 bit Cygwin, which doesn't use leading underscores and has an unusual prologue. (jmp_save, jmp_restore): Separately defined for 64 bit Cygwin, due to use of Microsoft 64 bit calling conventions. * signal.h (struct jmp): In x86-64 version, only on Cygwin, new members: rsi and rdi. These registers are considered nonvolatile and so are saved and restored by jmp_save and jmp_restore.
* Copyright year bump.Kaz Kylheku2015-12-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | * LICENSE, 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, 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/cadr.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/struct.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, stream.c, stream.h, struct.c, struct.h, sysif.c, sysif.h, syslog.c, syslog.h, txr.1, txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h: Add 2016 copyright. * linenoise/LICENSE, linenoise/linenoise.c, linenoise/linenoise.h: Bump one principal author's copyright from 2014 to 2015. The code is based on a snapshot of 2015 upstream work.
* Make small_sigset_t narrower.Kaz Kylheku2015-11-051-1/+1
| | | | | | | | | On 64 bit Darwin, sigset_t is 32 bits, sso our small_sigset_t is actually larger. Let's use unsigned int. * signal.h (small_sigset_t): Use unsignd int for set member. * signal.c (small_sigfillset): Change cast to unsigned int.
* Support Power PC 64.Kaz Kylheku2015-10-301-0/+28
| | | | | | * jmp.S (jmp_save, jmp_restore): Add PPC64 versions. * signal.h (struct jmp): Add PPC64 version.
* Reduce size of saved/restored signal masks.Kaz Kylheku2015-10-271-14/+8
| | | | | | | | | | | | | | | | | | | | | | | | | On glibc, sigset_t has a ridiculous size: one kilobyte! The kernel doesn't access most of it in the sigprocmask call. Yet it blows up the size of our dynamic frames quite a lot. In this commit, we define a small_sigset_t type and use that instead. We convert to the bloated one when calling the library. * signal.c (sig_blocked_cache): Type changes to small_sigset_t. (sig_reload_cache): Retrieve signal mask with sigprocmask into a local variable, then copy a small portion from that to sig_blocked_cache. (small_sigfillset): New static function. (set_sig_handler): Local variables of sigset_t changed to small_sigset_t. (sig_mask): Arguments are pointers to small_sigset_t. Conversion to sigset_t done around the call to sigprocmask. * signal.h (copy_sigset): Inline funtion removed. (small_sigset_t): New struct type. (extended_jmp_buf): Member blocked changed to small_sigset_t. (extended_setjmp): Cast expression updated with small_sigset_t *. (extended_longjmp): Use assignment instead of copy_sigset. (sig_blocked_cache, sig_mask): Declarations updated.
* Stop using C library setjmp/longjmp.Kaz Kylheku2015-10-251-6/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TXR is moving to custom assembly-language routines. This is mainly motivated by a very dubious thing done in the GNU C Library setjmp and longjmp in the name of security. Evidently, glibc's setjmp "mangles" certain pointer values which are stored into the jmp_buf buffer. It's been that way since 2005, evidently. This means that, firstly, all along, the use of setjmp in gc.c to get registers into a buffer so they can be scanned has not actually worked properly. More importantly, this pointer mangling in setjmp and longjmp is very hostile to a stack copying implementation of delimited continuations. The reason is that continuations contain jmp_buf buffers, which get relocated in the process of capturing and reviving a continuation. Any pointers in a jmp_buf which point into the captured stack segment have to be fixed up to point into the relocated location. Mangled pointers make this difficult, requiring hacks which are specific to glibc and the machine architecture. We might as well implement a clean, well-behaved setjmp and longjmp. * Makefile (jmp.o): New object file. (dbg/%.o, opt/%.o): New rules for .S prerequisites. * args.c, arith.c, cadr.c, combi.c, cadr.c, combi.c, debug.c, eval.c, filter.c, glob.c, hash.c, lib.c, match.c, parser.c, rand.c, regex.c, signal.c, stream.c, struct.c, sysif.c, syslog.c, txr.c, unwind.c, utf8.c: Removed <setjmp.h> include. * gc.c: Switch to struct jmp and jmp_save, instead of jmp_buf and setjmp. * jmp.S: New source file. * signal.h (struct jmp): New struct type. (jmp_save, jmp_restore): New function declarations denoting assembly language routines in jmp.S. (extended_jmp_buf): Uses struct jmp instead of setjmp. (extended_setjmp): Use jmp_save instead of setjmp. (extended_longjmp): Use jmp_restore instead of longjmp.
* C++ upkeep: cannot assign to volatile sigset_t.Kaz Kylheku2015-09-221-1/+11
| | | | | | | | | | | | | | | | This is a hack for an ugly problem. A plain old struct is actually a class in C++, and assignment to a struct goes thorugh a generated assignment operator. Unfortunately, C++ doesn't generate an assignment operator for volatile destinations, so assignment to a volatile-qualified struct object is erroneous. * signal.h (copy_sigset): New inline function to copy a sigset_t, even if the left hand side is volatile. This works by stripping the qualifier. (sig_save_enable): Use the function.
* extended_jmp_buf members should be volatile.Kaz Kylheku2015-09-151-12/+14
| | | | | | | | | | | | | Instances of extended_jmp_buf structure are defined in automatic storage. The members are manipulated after setjmp and accessed after returning via longjmp. Therefore, they should be volatile-qualified. * signal.h (EJ_DBG_MEMB): Add volatile to dbg_depth. (extended_jmp_buf): Add volatile on all members in both versions of the structure. (extended_setjmp): Cast away volatile when passing sigset_t to sig_mask.
* Allow evaluation from repl to be interrupted.Kaz Kylheku2015-09-061-1/+10
| | | | | | | | | | | * eval.c (do_eval): Check for pending signals. * parser.c (repl_intr): New static function. (repl): Set up signal handler for SIGINT around REPL. * signal.h (sig_deferred): declared. (sig_check_fast): New inline function/macro. A bit of a rearrangement here.
* Ligher weight debug instrumentation.Kaz Kylheku2015-05-221-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This speeds up the TXR Lisp interpreter, because do_eval sets up a debug frame and uses debug_return. * debug.c (debug_block_s): Symbol removed. (debug_init): Remove initialization of debug_block_s. * debug.h (debug_block_s): Declaration removed. (debug_enter): Do not establish a named block or a catch block; no time-wasting unwind stack manipulation at all. The debug_depth variable is managed by the extended setjmp context now. Provide a return value variable, and a well-defined name to branch to to exit from the debug block. (debug_return): Do not use heavy-weight uw_block_return; simply set the return variable and branch to debug_return_out label. * signal.h (EJ_DBG_MEMB, EJ_DBG_SAVE, EJ_DBG_REST, EJ_OPT_MEMB, EJ_OPT_SAVE, EJ_OPT_REST): New macros. (extended_jmp_buf): Define optional global state variables using EJ_OPT_MEMB. (extended_setjmp): Save and restore optional globals using EJ_OPT_SAVE and EJ_OPT_RESTORE. Now debug_depth is saved and restored if debugging support is compiled in. * match.c (open_data_source): Remove bogus debug_return invocations which were uncovered here by changes to the macro. * eval.c (do_eval, expand_macro): debug_return must now be after debug_end, because it won't dynamically clean up frames that it doesn't know about. The set_dyn_env is no longer unreachable in expand_macro; it is now necessary because debug_return isn't doing the longjmp that previously restored dyn_env.
* * signal.h (sig_save_disable): Bugfix: macro enablingKaz Kylheku2015-05-011-1/+1
| | | | rather than disabling async signals.
* Update copyright notices from 2014 to 2015.Kaz Kylheku2015-02-011-1/+1
| | | | | | | | | | | * arith.c, arith.h, combi.c, combi.h, debug.c, debug.h, eval.c, eval.h, filter.c, filter.h, gc.c, gc.h, hash.c, hash.h, lib.c, lib.h, match.c, match.h, parser.h, rand.c, rand.h, regex.c, regex.h, signal.c, signal.h, stream.c, stream.h, sysif.c, sysif.h, syslog.c, syslog.h, txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h: Update. * LICENSE, METALICENSE: Likewise.
* * signal.h (sig_save_enable, sig_save_disable):Kaz Kylheku2015-01-121-8/+6
| | | | | | | | Use do;while(0) trick instead of local typedef to cause terminating semicolon to be required. (sig_restore_enable, sig_restore_disable): Remove superfluous do { } while (0). Closing a brace is good enough.
* * Makefile: Removing trailing spaces.Kaz Kylheku2014-10-241-1/+1
| | | | | | | | | | (GREP_CHECK): New macro. (enforce): Rewritten using GREP_CHECK, with new checks. * arith.c, combi.c, debug.c, eval.c, filter.c, gc.c, hash.c, lib.c, * lib.h, match.c, parser.l, parser.y, rand.c, regex.c, signal.c, * signal.h, stream.c, syslog.c, txr.c, unwind.c, utf8.c: Remove trailing spaces.
* * gc.c (top): Renamed to gc_prot_top, turned extern.Kaz Kylheku2014-08-251-2/+9
| | | | | | | | | (prot1, rel1, mark): Follow rename. * gc.h (gc_prot_top): Declared. * signal.h (extended_jmp_buf): New member, gc_pt. (extended_setjmp): Save and restore gc_prot_top.
* * configure (have_sys_time): New variable.Kaz Kylheku2014-08-011-0/+5
| | | | | | | | | | | | | | Added check for setitimer/getitimer which also checks for <sys/time.h>. * signal.c (sig_init): Register itimer-real, itimer-virtual, itimer-prof variables and getitimer and setitimer functions. (tv_to_usec): New static function. (getitimer_wrap, setitimer_wrap): New functions. * signal.h (getitimer_wrap, setitimer_wrap): Declared. * txr.1: Documented itimers.
* * signal.c (set_sig_handler): Don't use SA_ONSTACKKaz Kylheku2014-08-011-1/+1
| | | | | | | | except for signals for which we use alt stack. * signal.h (sig_save_enable): Do sig_check before enabling async signals. This caused the !async_sig_enabled assertion to trip inside make_obj.
* * signal.c (sig_hup, sig_int, sig_quit, sig_ill, sig_trap, sig_abrt,Kaz Kylheku2014-08-011-7/+0
| | | | | | | | | | sig_bus, sig_fpe, sig_kill, sig_usr1, sig_segv, sig_usr2, sig_pipe, sig_alrm, sig_term, sig_chld, sig_cont, sig_stop, sig_tstp, sig_ttin, sig_ttou, sig_urg, sig_xcpu, sig_xfsz, sigtalrm, sig_prof, sig_poll, sig_sys, sig_winch, sig_iot, sig_stkflt, sig_io, sig_lost, sig_pwr): Remove unused global variables variables. * signal.h: Remove declarations thereof.
* * Makefile, arith.c, arith.h, combi.c, combi.h, configure, debug.c,Kaz Kylheku2014-07-231-16/+16
| | | | | | | | debug.h, eval.c, eval.h, filter.c, filter.h, gc.c, gc.h, hash.c, hash.h, lib.c, lib.h, match.c, match.h, parser.h, parser.l, parser.y, rand.c, rand.h, regex.c, regex.h, signal.c, signal.h, stream.c, stream.h, syslog.c, syslog.h, txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h: Synchronize license header with LICENSE.
* On platforms with sigaltstack, TXR programs can now catch theKaz Kylheku2014-03-131-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | segmentation fault that occurs when running out of stack space, and escape by throwing an exception. Also, bugfix: save and restore the gc enable/disable state. Without this, if we are ever running cod in a gc disabled state and it jumps out, gc stays disabled. * configure: added check for sigaltstack. * gc.h (gc_enabled): Declaration added for existing variable. * signal.c (is_cpu_exception): New static function. (sig_handler): For cpu_exception type signals that pertain to the execution of some instruction, turn on async_sig_enabled, so that the signal is not deferred. Otherwise we will just return without calling the user-defined handler, restart the instruction and get into a loop. Also, disable gc around the handler just in case. One issue is that we might be on an alternate stack, which gc won't like. (setup_alt_stack, teardown_alt_stack): New static functions. (set_sig_handler): If we have sigaltstack, and are asked to set up a SEGV handler, then set it up on the alternate stack. * signal.h (extended_jmp_buf): Adding new member, gc. (extended_setjmp, extended_longjmp): use gc member to save and restore the gc_enable state across setjmp and longjmp.
* Introducing some changes for improved handling of special variables.Kaz Kylheku2014-02-231-3/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Saving and restoring of individual variables is very silly and it's making it difficult to implement function parameters that are rebindings of special variables. Let's have a global pointer to a dynamic environment called dyn_env. Let's make it part of the extended_jmp_buf structure, so that it's implicitly saved and restored across exception handling. Special variable lookups go through the dyn_env chain, and fall back on the global bindings. To override some specials, we just push a new dynamic environment and stick them there. (As a bonus, the bindings can even be repeated in the lexical environment (i.e. the same objects), so they can be found faster. We have to make sure we remove that environment when we leave the scope in the normal way. If we unwind out, it is done automatically by extended_longjmp mechanism. * eval.c (dyn_env): New global variable. (lookup_var, lookup_var_l): If env is nil, look in the dyn_env first, and only if that fails, look in the global bindings top_vb. * signal.h (extended_jmp_buf): New member, de, for saving/restoring dyn_env. This structure is now used whether or not we have signals. (extended_setjmp, extended_longjmp): Updated to save and restore dyn_env, and to do it regardless of whether there is POSIX signal support. (dyn_env): Declared here.
* Long overdue MinGW port maintenance.Kaz Kylheku2014-01-091-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Makefile: Use new EXE variable from config.mk. * configure (exe, have_windows_h): New variables. Handle situations with .exe suffix; on MiGW, the rm command doesn't work on executables if the .exe suffix is not given. New tests for localtime_r and gmtime_r. * lib.c: Supply declarations which are missing on MinGW because we use gcc -ansi, because MinGW doesn't follow established conventions like -D_POSIX_SOURCE. Supply definitions for gmtime_r, localtime_r, setenv and unsetenv. * parser.l: Supply declarations which are missing on MinGW. * signal.h (async_sig_enabled): Declare differently based on HAVE_POSIX_SIGS. Misspelled typedef fixed in the code for !HAVE_POSIX_SIGS that has hitherto not been compiled. (sig_mask): Wrap declaration in #ifdef HAVE_POSIX_SIGS because it relies on sigset_t. * stream.c: Supply declarations which are missing on MinGW. Include <windows.h> if we have it. (sleep): Define for Windows. (statf): Handle missing st_blksize and st_blocks members in struct stat. (stream_init): Handle numerous missing S_* macros. * utf8.c: Supply declarations which are missing on MinGW.
* Fixing a bug and performance issue.Kaz Kylheku2013-12-201-3/+10
| | | | | | | | | | | | | | | | | | | | | Problem: we are using sigsetjmp but with a jmp_buf structure; it requires sigjmp_buf! Performance issue: sigsetjmp is a dog which makes system calls. Solution: let's roll our own cached version of sigprocmask which only calls the real sigprocmask when the mask changes. Then our extended_setjmp will just use regular setjmp, plus our own custom signal saving and restoring based on the cached version. * signal.c (sig_blocked_cache): New variable. (set_sig_handler): Use our sig_mask instead of sigprocmask. (mem_set_bits, mem_clr_bits): New static functions. (sig_mask): New function. * signal.h (extended_jmp_buf): New member, blocked. (extended_setjmp): save blocked signals by peeking into sig_blocked_cache, and restore using sig_mask. (sig_blocked_cache, sig_mask): Declared.
* * eval.c (eval_init): Registered vars for signal numbers.Kaz Kylheku2013-12-121-0/+7
| | | | | | | | | | | | * signal.c (sig_hup, sig_int, sig_quit, sig_ill, sig_trap, sig_abrt, sig_bus, val sig_fpe, sig_kill, sig_usr1, sig_segv, sig_usr2, sig_pipe, sig_alrm, val sig_term, sig_chld, sig_cont, sig_stop, sig_tstp, sig_ttin, val sig_ttou, sig_urg, sig_xcpu, sig_xfsz, sigtalrm, sig_prof, val sig_poll, sig_sys, sig_winch, sig_iot, sig_stkflt, sig_io, sig_lost, sig_pwr): New variables. (sig_init): New variables initialized. * signal.h: New variables declared.
* First cut at signal handling support.Kaz Kylheku2013-12-121-0/+93
* Makefile (OBJS-y): Include signal.o if have_posix_sigs is "y". * configure (have_posix_sigs): New variable, set by detecting POSIX signal stuff. * dep.mk: Regenerated. * arith.c, debug.c, eval.c, filter.c, hash.c, match.c, parser.y, parser.l, rand.c, regex.c, syslog.c, txr.c, utf8.c: Include new signal.h header, now required by unwind, and the <signal.h> system header. * eval.c (exit_wrap): New function. (eval_init): New functions registered as intrinsics: exit_wrap, set_sig_handler, get_sig_handler, sig_check. * gc.c (release): Unused functions removed. * gc.h (release): Declaration removed. * lib.c (init): Call sig_init. * stream.c (set_putc, se_getc, se_fflush): New static functions. (stdio_put_char_callback, stdio_get_char_callback, stdio_put_byte, stdio_flush, stdio_get_byte): Use new functions to enable signals when blocked on I/O. (tail_strategy): Allow signals across sleep. (pipev_close): Allow signals across waitpid. (se_pclose): New static function. (pipe_close): Use new function to enable signals across pclose. * unwind.c (uw_unwind_to_exit_point): use extended_longjmp instead of longjmp. * unwind.h (struct uw_block, struct uw_catch): jb member changes from jmp_buf to extended_jmp_buf. (uw_block_begin, uw_simple_catch_begin, uw_catch_begin): Use extended_setjmp instead of setjmp. * signal.c: New file. * signal.h: New file.
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