| 1 | /* deb.c |
| 2 | * |
| 3 | * Copyright (c) 1991-1994, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * "Didst thou think that the eyes of the White Tower were blind? Nay, I |
| 12 | * have seen more than thou knowest, Gray Fool." --Denethor |
| 13 | */ |
| 14 | |
| 15 | #include "EXTERN.h" |
| 16 | #include "perl.h" |
| 17 | |
| 18 | #ifdef DEBUGGING |
| 19 | #if !defined(I_STDARG) && !defined(I_VARARGS) |
| 20 | |
| 21 | /* |
| 22 | * Fallback on the old hackers way of doing varargs |
| 23 | */ |
| 24 | |
| 25 | /*VARARGS1*/ |
| 26 | void |
| 27 | deb(pat,a1,a2,a3,a4,a5,a6,a7,a8) |
| 28 | char *pat; |
| 29 | { |
| 30 | register I32 i; |
| 31 | GV* gv = curcop->cop_filegv; |
| 32 | |
| 33 | PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", |
| 34 | SvTYPE(gv) == SVt_PVGV ? SvPVX(GvSV(gv)) : "<free>", |
| 35 | (long)curcop->cop_line); |
| 36 | for (i=0; i<dlevel; i++) |
| 37 | PerlIO_printf(Perl_debug_log, "%c%c ",debname[i],debdelim[i]); |
| 38 | PerlIO_printf(Perl_debug_log, pat,a1,a2,a3,a4,a5,a6,a7,a8); |
| 39 | } |
| 40 | |
| 41 | #else /* !defined(I_STDARG) && !defined(I_VARARGS) */ |
| 42 | |
| 43 | # ifdef I_STDARG |
| 44 | void |
| 45 | deb(const char *pat, ...) |
| 46 | # else |
| 47 | /*VARARGS1*/ |
| 48 | void |
| 49 | deb(pat, va_alist) |
| 50 | const char *pat; |
| 51 | va_dcl |
| 52 | # endif |
| 53 | { |
| 54 | va_list args; |
| 55 | register I32 i; |
| 56 | GV* gv = curcop->cop_filegv; |
| 57 | |
| 58 | PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", |
| 59 | SvTYPE(gv) == SVt_PVGV ? SvPVX(GvSV(gv)) : "<free>", |
| 60 | (long)curcop->cop_line); |
| 61 | for (i=0; i<dlevel; i++) |
| 62 | PerlIO_printf(Perl_debug_log, "%c%c ",debname[i],debdelim[i]); |
| 63 | |
| 64 | # ifdef I_STDARG |
| 65 | va_start(args, pat); |
| 66 | # else |
| 67 | va_start(args); |
| 68 | # endif |
| 69 | (void) PerlIO_vprintf(Perl_debug_log,pat,args); |
| 70 | va_end( args ); |
| 71 | } |
| 72 | #endif /* !defined(I_STDARG) && !defined(I_VARARGS) */ |
| 73 | |
| 74 | void |
| 75 | deb_growlevel() |
| 76 | { |
| 77 | dlmax += 128; |
| 78 | Renew(debname, dlmax, char); |
| 79 | Renew(debdelim, dlmax, char); |
| 80 | } |
| 81 | |
| 82 | I32 |
| 83 | debstackptrs() |
| 84 | { |
| 85 | PerlIO_printf(Perl_debug_log, "%8lx %8lx %8ld %8ld %8ld\n", |
| 86 | (unsigned long)curstack, (unsigned long)stack_base, |
| 87 | (long)*markstack_ptr, (long)(stack_sp-stack_base), |
| 88 | (long)(stack_max-stack_base)); |
| 89 | PerlIO_printf(Perl_debug_log, "%8lx %8lx %8ld %8ld %8ld\n", |
| 90 | (unsigned long)mainstack, (unsigned long)AvARRAY(curstack), |
| 91 | (long)mainstack, (long)AvFILL(curstack), (long)AvMAX(curstack)); |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | I32 |
| 96 | debstack() |
| 97 | { |
| 98 | I32 top = stack_sp - stack_base; |
| 99 | register I32 i = top - 30; |
| 100 | I32 *markscan = markstack; |
| 101 | |
| 102 | if (i < 0) |
| 103 | i = 0; |
| 104 | |
| 105 | while (++markscan <= markstack_ptr) |
| 106 | if (*markscan >= i) |
| 107 | break; |
| 108 | |
| 109 | PerlIO_printf(Perl_debug_log, i ? " => ... " : " => "); |
| 110 | if (stack_base[0] != &sv_undef || stack_sp < stack_base) |
| 111 | PerlIO_printf(Perl_debug_log, " [STACK UNDERFLOW!!!]\n"); |
| 112 | do { |
| 113 | ++i; |
| 114 | if (markscan <= markstack_ptr && *markscan < i) { |
| 115 | do { |
| 116 | ++markscan; |
| 117 | PerlIO_putc(Perl_debug_log, '*'); |
| 118 | } |
| 119 | while (markscan <= markstack_ptr && *markscan < i); |
| 120 | PerlIO_printf(Perl_debug_log, " "); |
| 121 | } |
| 122 | if (i > top) |
| 123 | break; |
| 124 | PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(stack_base[i])); |
| 125 | } |
| 126 | while (1); |
| 127 | PerlIO_printf(Perl_debug_log, "\n"); |
| 128 | return 0; |
| 129 | } |
| 130 | #else |
| 131 | static int dummy; /* avoid totally empty deb.o file */ |
| 132 | #endif /* DEBUGGING */ |