[0e1846] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[341696] | 4 | /* $Id$ */ |
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[0e1846] | 5 | /* |
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| 6 | * ABSTRACT - interupt handling |
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| 7 | */ |
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| 8 | |
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| 9 | /* includes */ |
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[502ea2] | 10 | #ifdef DecAlpha_OSF1 |
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| 11 | #define _XOPEN_SOURCE_EXTENDED |
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[d5bd816] | 12 | #endif /* MP3-Y2 0.022UF */ |
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[ef6f95] | 13 | |
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[0e1846] | 14 | #include <stdio.h> |
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| 15 | #include <stddef.h> |
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| 16 | #include <stdlib.h> |
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[502ea2] | 17 | #include <strings.h> |
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[0e1846] | 18 | #include <signal.h> |
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[561aa2] | 19 | #include <sys/types.h> |
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| 20 | #include <sys/wait.h> |
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[ef6f95] | 21 | |
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[b1dfaf] | 22 | #include <kernel/mod2.h> |
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| 23 | #include <omalloc/omalloc.h> |
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[737a68] | 24 | |
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| 25 | #include <kernel/polys.h> |
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[599326] | 26 | #include <kernel/febase.h> |
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[a40080] | 27 | |
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| 28 | #include "tok.h" |
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| 29 | #include "ipshell.h" |
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| 30 | #include "cntrlc.h" |
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| 31 | #include "feOpt.h" |
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| 32 | #include "version.h" |
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| 33 | #include "silink.h" |
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[dc0898] | 34 | |
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[d6681d] | 35 | /* undef, if you don't want GDB to come up on error */ |
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[b39d4d] | 36 | |
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| 37 | #if !defined(__alpha) |
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| 38 | #define CALL_GDB |
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| 39 | #endif |
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[d6681d] | 40 | |
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| 41 | #if defined(__OPTIMIZE__) && defined(CALL_GDB) |
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| 42 | #undef CALL_GDB |
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| 43 | #endif |
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| 44 | |
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[337d5b] | 45 | #if defined(unix) && !defined(hpux) |
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| 46 | #include <unistd.h> |
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| 47 | #include <sys/types.h> |
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| 48 | |
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| 49 | #ifdef TIME_WITH_SYS_TIME |
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| 50 | #include <time.h> |
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| 51 | #ifdef HAVE_SYS_TIME_H |
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| 52 | #include <sys/time.h> |
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| 53 | #endif |
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| 54 | #else |
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| 55 | #ifdef HAVE_SYS_TIME_H |
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| 56 | #include <sys/time.h> |
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| 57 | #else |
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| 58 | #include <time.h> |
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| 59 | #endif |
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| 60 | #endif |
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| 61 | #ifdef HAVE_SYS_TIMES_H |
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| 62 | #include <sys/times.h> |
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| 63 | #endif |
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| 64 | |
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| 65 | #define INTERACTIVE 0 |
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| 66 | #define STACK_TRACE 1 |
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| 67 | |
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| 68 | #ifdef CALL_GDB |
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| 69 | static void debug (int); |
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[a5da6f] | 70 | static void debug_stop (char *const*args); |
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[337d5b] | 71 | #endif |
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| 72 | #ifndef __OPTIMIZE__ |
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| 73 | static void stack_trace_sigchld (int); |
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[a5da6f] | 74 | static void stack_trace (char *const*args); |
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[337d5b] | 75 | #endif |
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| 76 | #endif |
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[0e1846] | 77 | |
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[85ab8cd] | 78 | si_link pipeLastLink=NULL; |
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[655e1f] | 79 | BOOLEAN singular_in_batchmode=FALSE; |
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[85ab8cd] | 80 | |
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| 81 | void sig_pipe_hdl(int sig) |
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| 82 | { |
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| 83 | if (pipeLastLink!=NULL) |
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| 84 | { |
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| 85 | slClose(pipeLastLink); |
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| 86 | pipeLastLink=NULL; |
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| 87 | WerrorS("pipe failed"); |
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| 88 | } |
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| 89 | } |
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| 90 | |
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[7626c5f] | 91 | void sig_term_hdl(int sig) |
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| 92 | { |
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| 93 | while (ssiToBeClosed!=NULL) |
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| 94 | { |
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| 95 | slClose(ssiToBeClosed->l); |
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[1da23e5] | 96 | if (ssiToBeClosed==NULL) break; |
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[7626c5f] | 97 | ssiToBeClosed=(link_list)ssiToBeClosed->next; |
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| 98 | } |
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[387e4a] | 99 | exit(1); |
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[7626c5f] | 100 | } |
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| 101 | |
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[d5bd816] | 102 | /*---------------------------------------------------------------------* |
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| 103 | * File scope Variables (Variables share by several functions in |
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| 104 | * the same file ) |
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| 105 | * |
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| 106 | *---------------------------------------------------------------------*/ |
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[0e1846] | 107 | /* data */ |
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[07dacd] | 108 | jmp_buf si_start_jmpbuf; |
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[0e1846] | 109 | int siRandomStart; |
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[07dacd] | 110 | short si_restart=0; |
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| 111 | BOOLEAN siCntrlc = FALSE; |
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[0e1846] | 112 | |
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[5812c69] | 113 | typedef void (*si_hdl_typ)(int); |
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| 114 | |
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[7c96c03] | 115 | |
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[0e1846] | 116 | /*0 implementation*/ |
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[d5bd816] | 117 | /*---------------------------------------------------------------------* |
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| 118 | * Functions declarations |
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| 119 | * |
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| 120 | *---------------------------------------------------------------------*/ |
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[0e1846] | 121 | void sigint_handler(int sig); |
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[d5bd816] | 122 | |
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[7c96c03] | 123 | si_hdl_typ si_set_signal ( int sig, si_hdl_typ signal_handler); |
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[d5bd816] | 124 | |
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| 125 | /*---------------------------------------------------------------------*/ |
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[337d5b] | 126 | /** |
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[d5bd816] | 127 | * @brief meta function for binding a signal to an handler |
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| 128 | |
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| 129 | @param[in] sig Signal number |
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| 130 | @param[in] signal_handler Pointer to signal handler |
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| 131 | |
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| 132 | @return value of signal() |
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| 133 | **/ |
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| 134 | /*---------------------------------------------------------------------*/ |
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[85ab8cd] | 135 | si_hdl_typ si_set_signal ( int sig, si_hdl_typ signal_handler) |
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[d5bd816] | 136 | { |
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[7c96c03] | 137 | si_hdl_typ retval=signal (sig, (si_hdl_typ)signal_handler); |
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| 138 | if (retval == SIG_ERR) |
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| 139 | { |
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[d5bd816] | 140 | fprintf(stderr, "Unable to init signal %d ... exiting...\n", sig); |
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| 141 | } |
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[206aed] | 142 | #ifdef HAVE_SIGINTERRUPT |
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[d5bd816] | 143 | siginterrupt(sig, 1); |
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[206aed] | 144 | #endif |
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[d5bd816] | 145 | return retval; |
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[7c96c03] | 146 | } /* si_set_signal */ |
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[d5bd816] | 147 | |
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[0e1846] | 148 | |
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[d5bd816] | 149 | /*---------------------------------------------------------------------*/ |
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[337d5b] | 150 | #if defined(ix86_Linux) |
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[4f818c] | 151 | #if !defined(HAVE_SIGCONTEXT) && !defined(HAVE_ASM_SIGCONTEXT_H) |
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[c7a653] | 152 | // we need the following structure sigcontext_struct. |
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| 153 | // if configure finds asm/singcontext.h we assume |
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| 154 | // that this file contains the structure and is included |
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| 155 | // via signal.h |
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[0e1846] | 156 | struct sigcontext_struct { |
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| 157 | unsigned short gs, __gsh; |
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| 158 | unsigned short fs, __fsh; |
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| 159 | unsigned short es, __esh; |
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| 160 | unsigned short ds, __dsh; |
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| 161 | unsigned long edi; |
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| 162 | unsigned long esi; |
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| 163 | unsigned long ebp; |
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| 164 | unsigned long esp; |
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| 165 | unsigned long ebx; |
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| 166 | unsigned long edx; |
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| 167 | unsigned long ecx; |
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| 168 | unsigned long eax; |
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| 169 | unsigned long trapno; |
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| 170 | unsigned long err; |
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| 171 | unsigned long eip; |
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| 172 | unsigned short cs, __csh; |
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| 173 | unsigned long eflags; |
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| 174 | unsigned long esp_at_signal; |
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| 175 | unsigned short ss, __ssh; |
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| 176 | unsigned long i387; |
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| 177 | unsigned long oldmask; |
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| 178 | unsigned long cr2; |
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| 179 | }; |
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[337d5b] | 180 | #endif |
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[f72aa03] | 181 | #define HAVE_SIGSTRUCT |
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[0e1846] | 182 | typedef struct sigcontext_struct sigcontext; |
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[f72aa03] | 183 | #endif |
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[337d5b] | 184 | |
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| 185 | #if defined(x86_64_Linux) |
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[f72aa03] | 186 | #define HAVE_SIGSTRUCT |
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| 187 | #endif |
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[0e1846] | 188 | |
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[d5bd816] | 189 | |
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[337d5b] | 190 | #if defined(HAVE_SIGSTRUCT) |
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[d5bd816] | 191 | /*2---------------------------------------------------------------------*/ |
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[337d5b] | 192 | /** |
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| 193 | * @brief signal handler for run time errors, linux/i386, x86_64 version |
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[d5bd816] | 194 | |
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[337d5b] | 195 | @param[in] sig |
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| 196 | @param[in] s |
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[d5bd816] | 197 | **/ |
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| 198 | /*---------------------------------------------------------------------*/ |
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[0e1846] | 199 | void sigsegv_handler(int sig, sigcontext s) |
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| 200 | { |
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[d7e6e0] | 201 | fprintf(stderr,"Singular : signal %d (v: %d/%s):\n",sig,SINGULAR_VERSION,feVersionId); |
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[0e1846] | 202 | if (sig!=SIGINT) |
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| 203 | { |
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[f9d901] | 204 | fprintf(stderr,"current line:>>%s<<\n",my_yylinebuf); |
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[1270db] | 205 | fprintf(stderr,"Segment fault/Bus error occurred at %lx because of %lx (r:%d)\n" |
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[0e1846] | 206 | "please inform the authors\n", |
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[c7a653] | 207 | #ifdef __i386__ |
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[28fc7b] | 208 | (long)s.eip, |
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[c7a653] | 209 | #else /* x86_64*/ |
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[28fc7b] | 210 | (long)s.rip, |
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[c7a653] | 211 | #endif |
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| 212 | (long)s.cr2,siRandomStart); |
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[0e1846] | 213 | } |
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[337d5b] | 214 | #ifdef __OPTIMIZE__ |
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[07dacd] | 215 | if(si_restart<3) |
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| 216 | { |
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| 217 | si_restart++; |
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| 218 | fprintf(stderr,"trying to restart...\n"); |
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| 219 | init_signals(); |
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| 220 | longjmp(si_start_jmpbuf,1); |
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| 221 | } |
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[337d5b] | 222 | #endif /* __OPTIMIZE__ */ |
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| 223 | #ifdef CALL_GDB |
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[9803fb] | 224 | if (sig!=SIGINT) |
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| 225 | { |
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| 226 | if (singular_in_batchmode) debug(STACK_TRACE); |
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| 227 | else debug(INTERACTIVE); |
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| 228 | } |
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[337d5b] | 229 | #endif /* CALL_GDB */ |
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[0e1846] | 230 | exit(0); |
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| 231 | } |
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| 232 | |
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[d5bd816] | 233 | /*---------------------------------------------------------------------*/ |
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[337d5b] | 234 | /** |
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[d5bd816] | 235 | * @brief additional default signal handler |
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| 236 | |
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[6b02bf2] | 237 | // some newer Linux version cannot have SIG_IGN for SIGCHLD, |
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| 238 | // so use this nice routine here: |
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| 239 | // SuSe 9.x reports -1 always |
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| 240 | // Redhat 9.x/FC x reports sometimes -1 |
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| 241 | // see also: hpux_system |
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[951dacc] | 242 | // also needed by getrusage (timer etc.) |
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[d5bd816] | 243 | |
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[337d5b] | 244 | @param[in] sig |
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[d5bd816] | 245 | **/ |
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| 246 | /*---------------------------------------------------------------------*/ |
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[7626c5f] | 247 | void sig_chld_hdl(int sig) |
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[d5bd816] | 248 | { |
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[561aa2] | 249 | waitpid(-1,NULL,WNOHANG); |
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[6b02bf2] | 250 | } |
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| 251 | |
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[0e1846] | 252 | /*2 |
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[97eb91] | 253 | * init signal handlers, linux/i386 version |
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[0e1846] | 254 | */ |
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| 255 | void init_signals() |
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| 256 | { |
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| 257 | /*4 signal handler: linux*/ |
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[7c96c03] | 258 | if (SIG_ERR==si_set_signal(SIGSEGV,(si_hdl_typ)sigsegv_handler)) |
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[057e93c] | 259 | { |
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| 260 | PrintS("cannot set signal handler for SEGV\n"); |
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| 261 | } |
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[7c96c03] | 262 | if (SIG_ERR==si_set_signal(SIGFPE, (si_hdl_typ)sigsegv_handler)) |
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[057e93c] | 263 | { |
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| 264 | PrintS("cannot set signal handler for FPE\n"); |
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| 265 | } |
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[7c96c03] | 266 | if (SIG_ERR==si_set_signal(SIGILL, (si_hdl_typ)sigsegv_handler)) |
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[057e93c] | 267 | { |
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| 268 | PrintS("cannot set signal handler for ILL\n"); |
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| 269 | } |
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[7c96c03] | 270 | if (SIG_ERR==si_set_signal(SIGIOT, (si_hdl_typ)sigsegv_handler)) |
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[057e93c] | 271 | { |
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| 272 | PrintS("cannot set signal handler for IOT\n"); |
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| 273 | } |
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[7c96c03] | 274 | if (SIG_ERR==si_set_signal(SIGINT ,(si_hdl_typ)sigint_handler)) |
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[057e93c] | 275 | { |
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| 276 | PrintS("cannot set signal handler for INT\n"); |
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| 277 | } |
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[7626c5f] | 278 | si_set_signal(SIGCHLD, (si_hdl_typ)sig_chld_hdl); |
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[ffc237] | 279 | si_set_signal(SIGPIPE, (si_hdl_typ)sig_pipe_hdl); |
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[7626c5f] | 280 | si_set_signal(SIGTERM, (si_hdl_typ)sig_term_hdl); |
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[0e1846] | 281 | } |
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| 282 | |
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[d5bd816] | 283 | /*---------------------------------------------------------------------*/ |
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[337d5b] | 284 | #elif defined(SunOS) /*SPARC_SUNOS*/ |
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[0e1846] | 285 | /*2 |
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| 286 | * signal handler for run time errors, sparc sunos 4 version |
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| 287 | */ |
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| 288 | void sigsegv_handler(int sig, int code, struct sigcontext *scp, char *addr) |
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| 289 | { |
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[d7e6e0] | 290 | fprintf(stderr,"Singular : signal %d, code %d (v: %d/%s):\n", |
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[c06a32] | 291 | sig,code,SINGULAR_VERSION,feVersionId); |
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[0e1846] | 292 | if ((sig!=SIGINT)&&(sig!=SIGABRT)) |
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| 293 | { |
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[f9d901] | 294 | fprintf(stderr,"current line:>>%s<<\n",my_yylinebuf); |
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[0e1846] | 295 | fprintf(stderr,"Segment fault/Bus error occurred at %x (r:%d)\n" |
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| 296 | "please inform the authors\n", |
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| 297 | (int)addr,siRandomStart); |
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| 298 | } |
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[337d5b] | 299 | #ifdef __OPTIMIZE__ |
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[97eb91] | 300 | if(si_restart<3) |
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| 301 | { |
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| 302 | si_restart++; |
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| 303 | fprintf(stderr,"trying to restart...\n"); |
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| 304 | init_signals(); |
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| 305 | longjmp(si_start_jmpbuf,1); |
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| 306 | } |
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[337d5b] | 307 | #endif /* __OPTIMIZE__ */ |
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| 308 | #ifdef CALL_GDB |
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[0e1846] | 309 | if (sig!=SIGINT) debug(STACK_TRACE); |
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[337d5b] | 310 | #endif /* CALL_GDB */ |
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[0e1846] | 311 | exit(0); |
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| 312 | } |
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| 313 | |
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| 314 | /*2 |
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| 315 | * init signal handlers, sparc sunos 4 version |
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| 316 | */ |
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| 317 | void init_signals() |
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| 318 | { |
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| 319 | /*4 signal handler:*/ |
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[7c96c03] | 320 | si_set_signal(SIGSEGV,sigsegv_handler); |
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| 321 | si_set_signal(SIGBUS, sigsegv_handler); |
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| 322 | si_set_signal(SIGFPE, sigsegv_handler); |
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| 323 | si_set_signal(SIGILL, sigsegv_handler); |
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| 324 | si_set_signal(SIGIOT, sigsegv_handler); |
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| 325 | si_set_signal(SIGINT ,sigint_handler); |
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| 326 | si_set_signal(SIGCHLD, (void (*)(int))SIG_IGN); |
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[85ab8cd] | 327 | si_set_signal(SIGPIPE, (si_hdl_typ)sig_pipe_hdl); |
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[0e1846] | 328 | } |
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[337d5b] | 329 | #else |
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[0e1846] | 330 | |
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[d5bd816] | 331 | /*---------------------------------------------------------------------*/ |
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[0e1846] | 332 | /*2 |
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| 333 | * signal handler for run time errors, general version |
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| 334 | */ |
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| 335 | void sigsegv_handler(int sig) |
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| 336 | { |
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[d7e6e0] | 337 | fprintf(stderr,"Singular : signal %d (v: %d/%s):\n", |
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[c06a32] | 338 | sig,SINGULAR_VERSION,feVersionId); |
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[0e1846] | 339 | if (sig!=SIGINT) |
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| 340 | { |
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[f9d901] | 341 | fprintf(stderr,"current line:>>%s<<\n",my_yylinebuf); |
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[0e1846] | 342 | fprintf(stderr,"Segment fault/Bus error occurred (r:%d)\n" |
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| 343 | "please inform the authors\n", |
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| 344 | siRandomStart); |
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| 345 | } |
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[337d5b] | 346 | #ifdef __OPTIMIZE__ |
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[97eb91] | 347 | if(si_restart<3) |
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| 348 | { |
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| 349 | si_restart++; |
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| 350 | fprintf(stderr,"trying to restart...\n"); |
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| 351 | init_signals(); |
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| 352 | longjmp(si_start_jmpbuf,1); |
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| 353 | } |
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[337d5b] | 354 | #endif /* __OPTIMIZE__ */ |
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| 355 | #if defined(unix) && !defined(hpux) |
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| 356 | /* debug(..) does not work under HPUX (because ptrace does not work..) */ |
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| 357 | #ifdef CALL_GDB |
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[0e1846] | 358 | if (sig!=SIGINT) debug(STACK_TRACE); |
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[337d5b] | 359 | #endif /* CALL_GDB */ |
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| 360 | #endif /* unix */ |
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[0e1846] | 361 | exit(0); |
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| 362 | } |
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| 363 | |
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| 364 | /*2 |
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| 365 | * init signal handlers, general version |
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| 366 | */ |
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| 367 | void init_signals() |
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| 368 | { |
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| 369 | /*4 signal handler:*/ |
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[7c96c03] | 370 | si_set_signal(SIGSEGV,(void (*) (int))sigsegv_handler); |
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[337d5b] | 371 | #ifdef SIGBUS |
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[7c96c03] | 372 | si_set_signal(SIGBUS, sigsegv_handler); |
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[337d5b] | 373 | #endif /* SIGBUS */ |
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| 374 | #ifdef SIGFPE |
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[7c96c03] | 375 | si_set_signal(SIGFPE, sigsegv_handler); |
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[337d5b] | 376 | #endif /* SIGFPE */ |
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| 377 | #ifdef SIGILL |
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[7c96c03] | 378 | si_set_signal(SIGILL, sigsegv_handler); |
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[337d5b] | 379 | #endif /* SIGILL */ |
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| 380 | #ifdef SIGIOT |
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[7c96c03] | 381 | si_set_signal(SIGIOT, sigsegv_handler); |
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[337d5b] | 382 | #endif /* SIGIOT */ |
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| 383 | #ifdef SIGXCPU |
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[7c96c03] | 384 | si_set_signal(SIGXCPU, (void (*)(int))SIG_IGN); |
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[337d5b] | 385 | #endif /* SIGIOT */ |
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[7c96c03] | 386 | si_set_signal(SIGINT ,sigint_handler); |
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[337d5b] | 387 | #if defined(HPUX_9) || defined(HPUX_10) |
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[7c96c03] | 388 | si_set_signal(SIGCHLD, (void (*)(int))SIG_IGN); |
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[337d5b] | 389 | #endif |
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[85ab8cd] | 390 | si_set_signal(SIGPIPE, (si_hdl_typ)sig_pipe_hdl); |
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[0e1846] | 391 | } |
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[337d5b] | 392 | #endif |
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[d5bd816] | 393 | |
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[0e1846] | 394 | |
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| 395 | /*2 |
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| 396 | * signal handler for SIGINT |
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| 397 | */ |
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| 398 | void sigint_handler(int sig) |
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| 399 | { |
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[66415e1] | 400 | mflush(); |
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[337d5b] | 401 | #ifdef HAVE_FEREAD |
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[0fa9018] | 402 | if (fe_is_raw_tty) fe_temp_reset(); |
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[337d5b] | 403 | #endif /* HAVE_FEREAD */ |
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[66415e1] | 404 | loop |
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| 405 | { |
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[e8a30d] | 406 | int cnt=0; |
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[2272c33] | 407 | int c; |
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[eed07e8] | 408 | if(singular_in_batchmode) |
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[2272c33] | 409 | { |
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[eed07e8] | 410 | c = 'q'; |
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[2272c33] | 411 | } |
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| 412 | else |
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| 413 | { |
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[eed07e8] | 414 | fprintf(stderr,"// ** Interrupt at cmd:`%s` in line:'%s'\n", |
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| 415 | Tok2Cmdname(iiOp),my_yylinebuf); |
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| 416 | if (feGetOptValue(FE_OPT_EMACS) == NULL) |
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| 417 | { |
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| 418 | fputs("abort command(a), continue(c) or quit Singular(q) ?",stderr);fflush(stderr); |
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| 419 | c = fgetc(stdin); |
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| 420 | } |
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| 421 | else |
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| 422 | { |
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| 423 | c = 'a'; |
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| 424 | } |
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[2272c33] | 425 | } |
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[337d5b] | 426 | |
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[2272c33] | 427 | switch(c) |
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[66415e1] | 428 | { |
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| 429 | case 'q': |
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| 430 | m2_end(2); |
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[07dacd] | 431 | case 'r': |
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| 432 | longjmp(si_start_jmpbuf,1); |
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[09e228] | 433 | case 'b': |
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| 434 | VoiceBackTrack(); |
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| 435 | break; |
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[e8a30d] | 436 | case 'a': |
---|
| 437 | siCntrlc++; |
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[66415e1] | 438 | case 'c': |
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[2272c33] | 439 | if (feGetOptValue(FE_OPT_EMACS) == NULL) fgetc(stdin); |
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[7c96c03] | 440 | si_set_signal(SIGINT ,(si_hdl_typ)sigint_handler); |
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[07dacd] | 441 | return; |
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[50b2df] | 442 | //siCntrlc ++; |
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[7c96c03] | 443 | //if (siCntrlc>2) si_set_signal(SIGINT,(si_hdl_typ) sigsegv_handler); |
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| 444 | //else si_set_signal(SIGINT,(si_hdl_typ) sigint_handler); |
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[66415e1] | 445 | } |
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[e8a30d] | 446 | cnt++; |
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| 447 | if(cnt>5) m2_end(2); |
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[66415e1] | 448 | } |
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[0e1846] | 449 | } |
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| 450 | |
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[e8a30d] | 451 | //void test_int() |
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| 452 | //{ |
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| 453 | // if (siCntrlc!=0) |
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| 454 | // { |
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| 455 | // int saveecho = si_echo; |
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| 456 | // siCntrlc = FALSE; |
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[7c96c03] | 457 | // si_set_signal(SIGINT ,sigint_handler); |
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[e8a30d] | 458 | // iiDebug(); |
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| 459 | // si_echo = saveecho; |
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| 460 | // } |
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| 461 | //} |
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[0e1846] | 462 | |
---|
| 463 | #ifdef unix |
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[d5bd816] | 464 | # ifndef hpux |
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| 465 | # ifndef __OPTIMIZE__ |
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[0e1846] | 466 | int si_stop_stack_trace_x; |
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[d5bd816] | 467 | # ifdef CALL_GDB |
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[577d19f] | 468 | static void debug (int method) |
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[0e1846] | 469 | { |
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[8a6c6a] | 470 | if (feOptValue(FE_OPT_NO_TTY)) |
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| 471 | { |
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| 472 | dReportError("Caught Signal 11"); |
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| 473 | return; |
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| 474 | } |
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[0e1846] | 475 | int pid; |
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| 476 | char buf[16]; |
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[a5da6f] | 477 | char * args[4] = { (char*)"gdb", (char*)"Singularg", NULL, NULL }; |
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[577d19f] | 478 | |
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[337d5b] | 479 | #ifdef HAVE_FEREAD |
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[0fa9018] | 480 | if (fe_is_raw_tty) fe_temp_reset(); |
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[337d5b] | 481 | #endif /* HAVE_FEREAD */ |
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[0fa9018] | 482 | |
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[0e1846] | 483 | sprintf (buf, "%d", getpid ()); |
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| 484 | |
---|
| 485 | args[2] = buf; |
---|
| 486 | |
---|
| 487 | pid = fork (); |
---|
| 488 | if (pid == 0) |
---|
| 489 | { |
---|
| 490 | switch (method) |
---|
| 491 | { |
---|
| 492 | case INTERACTIVE: |
---|
| 493 | fprintf (stderr, "debug_stop\n"); |
---|
| 494 | debug_stop (args); |
---|
| 495 | break; |
---|
[85e68dd] | 496 | #ifndef __OPTIMIZE__ |
---|
[0e1846] | 497 | case STACK_TRACE: |
---|
| 498 | fprintf (stderr, "stack_trace\n"); |
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| 499 | stack_trace (args); |
---|
| 500 | break; |
---|
[85e68dd] | 501 | #endif |
---|
[5687c9] | 502 | default: |
---|
| 503 | // should not be reached: |
---|
| 504 | exit(1); |
---|
[0e1846] | 505 | } |
---|
| 506 | } |
---|
| 507 | else if (pid == -1) |
---|
| 508 | { |
---|
| 509 | perror ("could not fork"); |
---|
| 510 | return; |
---|
| 511 | } |
---|
| 512 | |
---|
| 513 | si_stop_stack_trace_x = 1; |
---|
| 514 | while (si_stop_stack_trace_x) ; |
---|
| 515 | } |
---|
| 516 | |
---|
[a5da6f] | 517 | static void debug_stop (char *const*args) |
---|
[0e1846] | 518 | { |
---|
| 519 | execvp (args[0], args); |
---|
| 520 | perror ("exec failed"); |
---|
| 521 | _exit (0); |
---|
| 522 | } |
---|
[d5bd816] | 523 | # endif /* CALL_GDB */ |
---|
[0e1846] | 524 | |
---|
| 525 | static int stack_trace_done; |
---|
| 526 | |
---|
[a5da6f] | 527 | static void stack_trace (char *const*args) |
---|
[0e1846] | 528 | { |
---|
| 529 | int pid; |
---|
| 530 | int in_fd[2]; |
---|
| 531 | int out_fd[2]; |
---|
| 532 | fd_set fdset; |
---|
| 533 | fd_set readset; |
---|
| 534 | struct timeval tv; |
---|
| 535 | int sel, index, state; |
---|
| 536 | char buffer[256]; |
---|
| 537 | char c; |
---|
| 538 | |
---|
| 539 | stack_trace_done = 0; |
---|
| 540 | |
---|
| 541 | signal (SIGCHLD, stack_trace_sigchld); |
---|
| 542 | |
---|
| 543 | if ((pipe (in_fd) == -1) || (pipe (out_fd) == -1)) |
---|
| 544 | { |
---|
| 545 | perror ("could open pipe"); |
---|
[0fa9018] | 546 | m2_end(999); |
---|
[0e1846] | 547 | } |
---|
| 548 | |
---|
| 549 | pid = fork (); |
---|
| 550 | if (pid == 0) |
---|
| 551 | { |
---|
| 552 | close (0); dup2 (in_fd[0],0); /* set the stdin to the in pipe */ |
---|
| 553 | close (1); dup2 (out_fd[1],1); /* set the stdout to the out pipe */ |
---|
| 554 | close (2); dup2 (out_fd[1],2); /* set the stderr to the out pipe */ |
---|
| 555 | |
---|
| 556 | execvp (args[0], args); /* exec gdb */ |
---|
| 557 | perror ("exec failed"); |
---|
[0fa9018] | 558 | m2_end(999); |
---|
[0e1846] | 559 | } |
---|
| 560 | else if (pid == -1) |
---|
| 561 | { |
---|
| 562 | perror ("could not fork"); |
---|
[0fa9018] | 563 | m2_end(999); |
---|
[0e1846] | 564 | } |
---|
| 565 | |
---|
| 566 | FD_ZERO (&fdset); |
---|
| 567 | FD_SET (out_fd[0], &fdset); |
---|
| 568 | |
---|
| 569 | write (in_fd[1], "backtrace\n", 10); |
---|
| 570 | write (in_fd[1], "p si_stop_stack_trace_x = 0\n", 28); |
---|
| 571 | write (in_fd[1], "quit\n", 5); |
---|
| 572 | |
---|
| 573 | index = 0; |
---|
| 574 | state = 0; |
---|
| 575 | |
---|
| 576 | loop |
---|
| 577 | { |
---|
| 578 | readset = fdset; |
---|
| 579 | tv.tv_sec = 1; |
---|
| 580 | tv.tv_usec = 0; |
---|
| 581 | |
---|
[d5bd816] | 582 | # ifdef hpux |
---|
[0e1846] | 583 | sel = select (FD_SETSIZE, (int *)readset.fds_bits, NULL, NULL, &tv); |
---|
[d5bd816] | 584 | # else /* hpux */ |
---|
[0e1846] | 585 | sel = select (FD_SETSIZE, &readset, NULL, NULL, &tv); |
---|
[d5bd816] | 586 | # endif /* hpux */ |
---|
[0e1846] | 587 | if (sel == -1) |
---|
| 588 | break; |
---|
| 589 | |
---|
| 590 | if ((sel > 0) && (FD_ISSET (out_fd[0], &readset))) |
---|
| 591 | { |
---|
| 592 | if (read (out_fd[0], &c, 1)) |
---|
| 593 | { |
---|
| 594 | switch (state) |
---|
| 595 | { |
---|
| 596 | case 0: |
---|
| 597 | if (c == '#') |
---|
| 598 | { |
---|
| 599 | state = 1; |
---|
| 600 | index = 0; |
---|
| 601 | buffer[index++] = c; |
---|
| 602 | } |
---|
| 603 | break; |
---|
| 604 | case 1: |
---|
| 605 | buffer[index++] = c; |
---|
| 606 | if ((c == '\n') || (c == '\r')) |
---|
| 607 | { |
---|
| 608 | buffer[index] = 0; |
---|
| 609 | fprintf (stderr, "%s", buffer); |
---|
| 610 | state = 0; |
---|
| 611 | index = 0; |
---|
| 612 | } |
---|
| 613 | break; |
---|
| 614 | default: |
---|
| 615 | break; |
---|
| 616 | } |
---|
| 617 | } |
---|
| 618 | } |
---|
| 619 | else if (stack_trace_done) |
---|
| 620 | break; |
---|
| 621 | } |
---|
| 622 | |
---|
| 623 | close (in_fd[0]); |
---|
| 624 | close (in_fd[1]); |
---|
| 625 | close (out_fd[0]); |
---|
| 626 | close (out_fd[1]); |
---|
[0fa9018] | 627 | m2_end(0); |
---|
[0e1846] | 628 | } |
---|
| 629 | |
---|
| 630 | static void stack_trace_sigchld (int signum) |
---|
| 631 | { |
---|
| 632 | stack_trace_done = 1; |
---|
| 633 | } |
---|
| 634 | |
---|
[d5bd816] | 635 | # endif /* !__OPTIMIZE__ */ |
---|
| 636 | # endif /* !hpux */ |
---|
| 637 | #endif /* unix */ |
---|
[dc0898] | 638 | |
---|
| 639 | /* Under HPUX 9, system(...) returns -1 if SIGCHLD does not equal |
---|
| 640 | SIG_DFL. However, if it stays at SIG_DFL we get zombie processes |
---|
[337d5b] | 641 | for terminated childs generated by fork. Therefors some special treatment |
---|
[dc0898] | 642 | is necessary */ |
---|
| 643 | #ifdef HPUX_9 |
---|
[d5bd816] | 644 | # undef system |
---|
[dc0898] | 645 | extern "C" { |
---|
| 646 | int hpux9_system(const char* call) |
---|
| 647 | { |
---|
| 648 | int ret; |
---|
[7c96c03] | 649 | si_set_signal(SIGCHLD, (void (*)(int))SIG_DFL); |
---|
[dc0898] | 650 | ret = system(call); |
---|
[7c96c03] | 651 | si_set_signal(SIGCHLD, (void (*)(int))SIG_IGN); |
---|
[dc0898] | 652 | return ret; |
---|
| 653 | } |
---|
| 654 | } |
---|
| 655 | #endif /* HPUX_9 */ |
---|