/****************************************************************************** * * * N O T I C E * * * * Copyright Abandoned, 1987, Fred Fish * * * * * * This previously copyrighted work has been placed into the public * * domain by the author and may be freely used for any purpose, * * private or commercial. * * * * Because of the number of inquiries I was receiving about the use * * of this product in commercially developed works I have decided to * * simply make it public domain to further its unrestricted use. I * * specifically would be most happy to see this material become a * * part of the standard Unix distributions by AT&T and the Berkeley * * Computer Science Research Group, and a standard part of the GNU * * system from the Free Software Foundation. * * * * I would appreciate it, as a courtesy, if this notice is left in * * all copies and derivative works. Thank you. * * * * The author makes no warranty of any kind with respect to this * * product and explicitly disclaims any implied warranties of mer- * * chantability or fitness for any particular purpose. * * * ****************************************************************************** */ /* * FILE * * dbug.c runtime support routines for dbug package * * SCCS * * @(#)dbug.c 1.25 7/25/89 * * DESCRIPTION * * These are the runtime support routines for the dbug package. * The dbug package has two main components; the user include * file containing various macro definitions, and the runtime * support routines which are called from the macro expansions. * * Externally visible functions in the runtime support module * use the naming convention pattern "_db_xx...xx_", thus * they are unlikely to collide with user defined function names. * * AUTHOR(S) * * Fred Fish (base code) * Enhanced Software Technologies, Tempe, AZ * asuvax!mcdphx!estinc!fnf * * Binayak Banerjee (profiling enhancements) * seismo!bpa!sjuvax!bbanerje * * Michael Widenius: * DBUG_DUMP - To dump a block of memory. * PUSH_FLAG "O" - To be used insted of "o" if we * want flushing after each write * PUSH_FLAG "A" - as 'O', but we will append to the out file instead * of creating a new one. * Check of malloc on entry/exit (option "S") * * DBUG_EXECUTE_IF * incremental mode (-#+t:-d,info ...) * DBUG_SET, _db_explain_ * thread-local settings * */ #include #include #include #if defined(MSDOS) || defined(__WIN__) #include #endif #ifndef DBUG_OFF /* * Manifest constants which may be "tuned" if desired. */ #define PRINTBUF 1024 /* Print buffer size */ #define INDENT 2 /* Indentation per trace level */ #define MAXDEPTH 200 /* Maximum trace depth default */ /* * The following flags are used to determine which * capabilities the user has enabled with the settings * push macro. */ #define TRACE_ON 000001 /* Trace enabled */ #define DEBUG_ON 000002 /* Debug enabled */ #define FILE_ON 000004 /* File name print enabled */ #define LINE_ON 000010 /* Line number print enabled */ #define DEPTH_ON 000020 /* Function nest level print enabled */ #define PROCESS_ON 000040 /* Process name print enabled */ #define NUMBER_ON 000100 /* Number each line of output */ #define PROFILE_ON 000200 /* Print out profiling code */ #define PID_ON 000400 /* Identify each line with process id */ #define TIMESTAMP_ON 001000 /* timestamp every line of output */ #define SANITY_CHECK_ON 002000 /* Check safemalloc on DBUG_ENTER */ #define FLUSH_ON_WRITE 004000 /* Flush on every write */ #define OPEN_APPEND 010000 /* Open for append */ #define TRACING (cs->stack->flags & TRACE_ON) #define DEBUGGING (cs->stack->flags & DEBUG_ON) #define PROFILING (cs->stack->flags & PROFILE_ON) /* * Typedefs to make things more obvious. */ #ifndef __WIN__ typedef int BOOLEAN; #else #define BOOLEAN BOOL #endif /* * Make it easy to change storage classes if necessary. */ #define IMPORT extern /* Names defined externally */ #define EXPORT /* Allocated here, available globally */ #define AUTO auto /* Names to be allocated on stack */ #define REGISTER register /* Names to be placed in registers */ /* * The default file for profiling. Could also add another flag * (G?) which allowed the user to specify this. * * If the automatic variables get allocated on the stack in * reverse order from their declarations, then define AUTOS_REVERSE. * This is used by the code that keeps track of stack usage. For * forward allocation, the difference in the dbug frame pointers * represents stack used by the callee function. For reverse allocation, * the difference represents stack used by the caller function. * */ #define PROF_FILE "dbugmon.out" #define PROF_EFMT "E\t%ld\t%s\n" #define PROF_SFMT "S\t%lx\t%lx\t%s\n" #define PROF_XFMT "X\t%ld\t%s\n" #ifdef M_I386 /* predefined by xenix 386 compiler */ #define AUTOS_REVERSE 1 #endif /* * Externally supplied functions. */ #ifndef HAVE_PERROR static void perror(); /* Fake system/library error print routine */ #endif IMPORT int _sanity(const char *file,uint line); /* safemalloc sanity checker */ /* * The user may specify a list of functions to trace or * debug. These lists are kept in a linear linked list, * a very simple implementation. */ struct link { struct link *next_link; /* Pointer to the next link */ char str[1]; /* Pointer to link's contents */ }; /* * Debugging settings can be pushed or popped off of a * stack which is implemented as a linked list. Note * that the head of the list is the current settings and the * stack is pushed by adding a new settings to the head of the * list or popped by removing the first link. * * Note: if out_file is NULL, the other fields are not initialized at all! */ struct settings { int flags; /* Current settings flags */ int maxdepth; /* Current maximum trace depth */ uint delay; /* Delay after each output line */ int sub_level; /* Sub this from code_state->level */ FILE *out_file; /* Current output stream */ FILE *prof_file; /* Current profiling stream */ char name[FN_REFLEN]; /* Name of output file */ struct link *functions; /* List of functions */ struct link *p_functions; /* List of profiled functions */ struct link *keywords; /* List of debug keywords */ struct link *processes; /* List of process names */ struct settings *next; /* Next settings in the list */ }; #define is_shared(S, V) ((S)->next && (S)->next->V == (S)->V) /* * Local variables not seen by user. */ static BOOLEAN init_done= FALSE; /* Set to TRUE when initialization done */ static struct settings init_settings; static const char *db_process= 0;/* Pointer to process name; argv[0] */ typedef struct _db_code_state_ { const char *process; /* Pointer to process name; usually argv[0] */ const char *func; /* Name of current user function */ const char *file; /* Name of current user file */ char **framep; /* Pointer to current frame */ struct settings *stack; /* debugging settings */ const char *jmpfunc; /* Remember current function for setjmp */ const char *jmpfile; /* Remember current file for setjmp */ int lineno; /* Current debugger output line number */ int level; /* Current function nesting level */ int jmplevel; /* Remember nesting level at setjmp() */ /* * The following variables are used to hold the state information * between the call to _db_pargs_() and _db_doprnt_(), during * expansion of the DBUG_PRINT macro. This is the only macro * that currently uses these variables. * * These variables are currently used only by _db_pargs_() and * _db_doprnt_(). */ uint u_line; /* User source code line number */ int locked; /* If locked with _db_lock_file_ */ const char *u_keyword; /* Keyword for current macro */ } CODE_STATE; /* The test below is so we could call functions with DBUG_ENTER before my_thread_init(). */ #define get_code_state_or_return if (!cs && !((cs=code_state()))) return /* Handling lists */ static struct link *ListAdd(struct link *, const char *, const char *); static struct link *ListDel(struct link *, const char *, const char *); static struct link *ListCopy(struct link *); static void FreeList(struct link *linkp); /* OpenClose debug output stream */ static void DBUGOpenFile(CODE_STATE *,const char *, const char *, int); static void DBUGCloseFile(CODE_STATE *cs, FILE *fp); /* Push current debug settings */ static void PushState(CODE_STATE *cs); /* Free memory associated with debug state. */ static void FreeState (CODE_STATE *cs, struct settings *state, int free_state); /* Test for tracing enabled */ static BOOLEAN DoTrace(CODE_STATE *cs); /* Test to see if file is writable */ #if !(!defined(HAVE_ACCESS) || defined(MSDOS)) static BOOLEAN Writable(const char *pathname); /* Change file owner and group */ static void ChangeOwner(CODE_STATE *cs, char *pathname); /* Allocate memory for runtime support */ #endif static void DoPrefix(CODE_STATE *cs, uint line); static char *DbugMalloc(size_t size); static const char *BaseName(const char *pathname); static void Indent(CODE_STATE *cs, int indent); static BOOLEAN InList(struct link *linkp,const char *cp); static void dbug_flush(CODE_STATE *); static void DbugExit(const char *why); static const char *DbugStrTok(const char *s); #ifndef THREAD /* Open profile output stream */ static FILE *OpenProfile(CODE_STATE *cs, const char *name); /* Profile if asked for it */ static BOOLEAN DoProfile(CODE_STATE *); /* Return current user time (ms) */ static unsigned long Clock(void); #endif /* * Miscellaneous printf format strings. */ #define ERR_MISSING_RETURN "%s: missing DBUG_RETURN or DBUG_VOID_RETURN macro in function \"%s\"\n" #define ERR_OPEN "%s: can't open debug output stream \"%s\": " #define ERR_CLOSE "%s: can't close debug file: " #define ERR_ABORT "%s: debugger aborting because %s\n" #define ERR_CHOWN "%s: can't change owner/group of \"%s\": " /* * Macros and defines for testing file accessibility under UNIX and MSDOS. */ #undef EXISTS #if !defined(HAVE_ACCESS) || defined(MSDOS) #define EXISTS(pathname) (FALSE) /* Assume no existance */ #define Writable(name) (TRUE) #else #define EXISTS(pathname) (access(pathname, F_OK) == 0) #define WRITABLE(pathname) (access(pathname, W_OK) == 0) #endif #ifndef MSDOS #define ChangeOwner(cs,name) #endif /* ** Macros to allow dbugging with threads */ #ifdef THREAD #include pthread_mutex_t THR_LOCK_dbug; static CODE_STATE *code_state(void) { CODE_STATE *cs=0; struct st_my_thread_var *tmp; if (!init_done) { pthread_mutex_init(&THR_LOCK_dbug,MY_MUTEX_INIT_FAST); bzero(&init_settings, sizeof(init_settings)); init_settings.out_file=stderr; init_settings.flags=OPEN_APPEND; init_done=TRUE; } if ((tmp=my_thread_var)) { if (!(cs=(CODE_STATE *) tmp->dbug)) { cs=(CODE_STATE*) DbugMalloc(sizeof(*cs)); bzero((uchar*) cs,sizeof(*cs)); cs->process= db_process ? db_process : "dbug"; cs->func="?func"; cs->file="?file"; cs->stack=&init_settings; tmp->dbug= (void*) cs; } } return cs; } #else /* !THREAD */ static CODE_STATE static_code_state= { "dbug", "?func", "?file", NULL, &init_settings, NullS, NullS, 0,0,0,0,0,NullS }; static CODE_STATE *code_state(void) { if (!init_done) { bzero(&init_settings, sizeof(init_settings)); init_settings.out_file=stderr; init_settings.flags=OPEN_APPEND; init_done=TRUE; } return &static_code_state; } #define pthread_mutex_lock(A) {} #define pthread_mutex_unlock(A) {} #endif /* * Translate some calls among different systems. */ #ifdef HAVE_SLEEP /* sleep() wants seconds */ #define Delay(A) sleep(((uint) A)/10) #else #define Delay(A) (0) #endif /* * FUNCTION * * _db_process_ give the name to the current process/thread * * SYNOPSIS * * VOID _process_(name) * char *name; * */ void _db_process_(const char *name) { CODE_STATE *cs=0; if (!db_process) db_process= name; get_code_state_or_return; cs->process= name; } /* * FUNCTION * * DbugParse parse control string and set current debugger setting * * DESCRIPTION * * Given pointer to a debug control string in "control", * parses the control string, and sets * up a current debug settings. * * The debug control string is a sequence of colon separated fields * as follows: * * [+]::...: * * Each field consists of a mandatory flag character followed by * an optional "," and comma separated list of modifiers: * * [sign]flag[,modifier,modifier,...,modifier] * * See the manual for the list of supported signs, flags, and modifiers * * For convenience, any leading "-#" is stripped off. * */ static void DbugParse(CODE_STATE *cs, const char *control) { const char *end; int rel=0; struct settings *stack; get_code_state_or_return; stack= cs->stack; if (control[0] == '-' && control[1] == '#') control+=2; rel= control[0] == '+' || control[0] == '-'; if ((!rel || (!stack->out_file && !stack->next))) { stack->flags= 0; stack->delay= 0; stack->maxdepth= 0; stack->sub_level= 0; stack->out_file= stderr; stack->prof_file= NULL; stack->functions= NULL; stack->p_functions= NULL; stack->keywords= NULL; stack->processes= NULL; } else if (!stack->out_file) { stack->flags= stack->next->flags; stack->delay= stack->next->delay; stack->maxdepth= stack->next->maxdepth; stack->sub_level= stack->next->sub_level; strcpy(stack->name, stack->next->name); stack->out_file= stack->next->out_file; stack->prof_file= stack->next->prof_file; if (stack->next == &init_settings) { /* never share with the global parent - it can change under your feet */ stack->functions= ListCopy(init_settings.functions); stack->p_functions= ListCopy(init_settings.p_functions); stack->keywords= ListCopy(init_settings.keywords); stack->processes= ListCopy(init_settings.processes); } else { stack->functions= stack->next->functions; stack->p_functions= stack->next->p_functions; stack->keywords= stack->next->keywords; stack->processes= stack->next->processes; } } end= DbugStrTok(control); while (control < end) { int c, sign= (*control == '+') ? 1 : (*control == '-') ? -1 : 0; if (sign) control++; if (!rel) sign=0; c= *control++; if (*control == ',') control++; /* XXX when adding new cases here, don't forget _db_explain_ ! */ switch (c) { case 'd': if (sign < 0 && control == end) { if (!is_shared(stack, keywords)) FreeList(stack->keywords); stack->keywords=NULL; stack->flags &= ~DEBUG_ON; break; } if (rel && is_shared(stack, keywords)) stack->keywords= ListCopy(stack->keywords); if (sign < 0) { if (DEBUGGING) stack->keywords= ListDel(stack->keywords, control, end); break; } stack->keywords= ListAdd(stack->keywords, control, end); stack->flags |= DEBUG_ON; break; case 'D': stack->delay= atoi(control); break; case 'f': if (sign < 0 && control == end) { if (!is_shared(stack,functions)) FreeList(stack->functions); stack->functions=NULL; break; } if (rel && is_shared(stack,functions)) stack->functions= ListCopy(stack->functions); if (sign < 0) stack->functions= ListDel(stack->functions, control, end); else stack->functions= ListAdd(stack->functions, control, end); break; case 'F': if (sign < 0) stack->flags &= ~FILE_ON; else stack->flags |= FILE_ON; break; case 'i': if (sign < 0) stack->flags &= ~PID_ON; else stack->flags |= PID_ON; break; #ifndef THREAD case 'g': if (OpenProfile(cs, PROF_FILE)) { stack->flags |= PROFILE_ON; stack->p_functions= ListAdd(stack->p_functions, control, end); } break; #endif case 'L': if (sign < 0) stack->flags &= ~LINE_ON; else stack->flags |= LINE_ON; break; case 'n': if (sign < 0) stack->flags &= ~DEPTH_ON; else stack->flags |= DEPTH_ON; break; case 'N': if (sign < 0) stack->flags &= ~NUMBER_ON; else stack->flags |= NUMBER_ON; break; case 'A': case 'O': stack->flags |= FLUSH_ON_WRITE; /* fall through */ case 'a': case 'o': if (sign < 0) { if (!is_shared(stack, out_file)) DBUGCloseFile(cs, stack->out_file); stack->flags &= ~FLUSH_ON_WRITE; stack->out_file= stderr; break; } if (c == 'a' || c == 'A') stack->flags |= OPEN_APPEND; else stack->flags &= ~OPEN_APPEND; if (control != end) DBUGOpenFile(cs, control, end, stack->flags & OPEN_APPEND); else DBUGOpenFile(cs, "-",0,0); break; case 'p': if (sign < 0 && control == end) { if (!is_shared(stack,processes)) FreeList(stack->processes); stack->processes=NULL; break; } if (rel && is_shared(stack, processes)) stack->processes= ListCopy(stack->processes); if (sign < 0) stack->processes= ListDel(stack->processes, control, end); else stack->processes= ListAdd(stack->processes, control, end); break; case 'P': if (sign < 0) stack->flags &= ~PROCESS_ON; else stack->flags |= PROCESS_ON; break; case 'r': stack->sub_level= cs->level; break; case 't': if (sign < 0) { if (control != end) stack->maxdepth-= atoi(control); else stack->maxdepth= 0; } else { if (control != end) stack->maxdepth+= atoi(control); else stack->maxdepth= MAXDEPTH; } if (stack->maxdepth > 0) stack->flags |= TRACE_ON; else stack->flags &= ~TRACE_ON; break; case 'T': if (sign < 0) stack->flags &= ~TIMESTAMP_ON; else stack->flags |= TIMESTAMP_ON; break; case 'S': if (sign < 0) stack->flags &= ~SANITY_CHECK_ON; else stack->flags |= SANITY_CHECK_ON; break; } if (!*end) break; control=end+1; end= DbugStrTok(control); } } /* * FUNCTION * * _db_set_ set current debugger settings * * SYNOPSIS * * VOID _db_set_(control) * char *control; * * DESCRIPTION * * Given pointer to a debug control string in "control", * parses the control string, and sets up a current debug * settings. Pushes a new debug settings if the current is * set to the initial debugger settings. */ void _db_set_(CODE_STATE *cs, const char *control) { get_code_state_or_return; if (cs->stack == &init_settings) PushState(cs); DbugParse(cs, control); } /* * FUNCTION * * _db_push_ push current debugger settings and set up new one * * SYNOPSIS * * VOID _db_push_(control) * char *control; * * DESCRIPTION * * Given pointer to a debug control string in "control", pushes * the current debug settings, parses the control string, and sets * up a new debug settings with DbugParse() * */ void _db_push_(const char *control) { CODE_STATE *cs=0; get_code_state_or_return; PushState(cs); DbugParse(cs, control); } /* * FUNCTION * * _db_set_init_ set initial debugger settings * * SYNOPSIS * * VOID _db_set_init_(control) * char *control; * * DESCRIPTION * see _db_set_ * */ void _db_set_init_(const char *control) { CODE_STATE tmp_cs; bzero((uchar*) &tmp_cs, sizeof(tmp_cs)); tmp_cs.stack= &init_settings; DbugParse(&tmp_cs, control); } /* * FUNCTION * * _db_pop_ pop the debug stack * * DESCRIPTION * * Pops the debug stack, returning the debug settings to its * condition prior to the most recent _db_push_ invocation. * Note that the pop will fail if it would remove the last * valid settings from the stack. This prevents user errors * in the push/pop sequence from screwing up the debugger. * Maybe there should be some kind of warning printed if the * user tries to pop too many states. * */ void _db_pop_() { struct settings *discard; CODE_STATE *cs=0; get_code_state_or_return; discard= cs->stack; if (discard->next != NULL) { cs->stack= discard->next; FreeState(cs, discard, 1); } } /* * FUNCTION * * _db_explain_ generates 'control' string for the current settings * * RETURN * 0 - ok * 1 - buffer too short, output truncated * */ /* helper macros */ #define char_to_buf(C) do { \ *buf++=(C); \ if (buf >= end) goto overflow; \ } while (0) #define str_to_buf(S) do { \ char_to_buf(','); \ buf=strnmov(buf, (S), len+1); \ if (buf >= end) goto overflow; \ } while (0) #define list_to_buf(l) do { \ struct link *listp=(l); \ while (listp) \ { \ str_to_buf(listp->str); \ listp=listp->next_link; \ } \ } while (0) #define int_to_buf(i) do { \ char b[50]; \ int10_to_str((i), b, 10); \ str_to_buf(b); \ } while (0) #define colon_to_buf do { \ if (buf != start) char_to_buf(':'); \ } while(0) #define op_int_to_buf(C, val, def) do { \ if ((val) != (def)) \ { \ colon_to_buf; \ char_to_buf((C)); \ int_to_buf(val); \ } \ } while (0) #define op_intf_to_buf(C, val, def, cond) do { \ if ((cond)) \ { \ colon_to_buf; \ char_to_buf((C)); \ if ((val) != (def)) int_to_buf(val); \ } \ } while (0) #define op_str_to_buf(C, val, cond) do { \ if ((cond)) \ { \ char *s=(val); \ colon_to_buf; \ char_to_buf((C)); \ if (*s) str_to_buf(s); \ } \ } while (0) #define op_list_to_buf(C, val, cond) do { \ if ((cond)) \ { \ colon_to_buf; \ char_to_buf((C)); \ list_to_buf(val); \ } \ } while (0) #define op_bool_to_buf(C, cond) do { \ if ((cond)) \ { \ colon_to_buf; \ char_to_buf((C)); \ } \ } while (0) int _db_explain_ (CODE_STATE *cs, char *buf, size_t len) { char *start=buf, *end=buf+len-4; get_code_state_or_return *buf=0; op_list_to_buf('d', cs->stack->keywords, DEBUGGING); op_int_to_buf ('D', cs->stack->delay, 0); op_list_to_buf('f', cs->stack->functions, cs->stack->functions); op_bool_to_buf('F', cs->stack->flags & FILE_ON); op_bool_to_buf('i', cs->stack->flags & PID_ON); op_list_to_buf('g', cs->stack->p_functions, PROFILING); op_bool_to_buf('L', cs->stack->flags & LINE_ON); op_bool_to_buf('n', cs->stack->flags & DEPTH_ON); op_bool_to_buf('N', cs->stack->flags & NUMBER_ON); op_str_to_buf( ((cs->stack->flags & FLUSH_ON_WRITE ? 0 : 32) | (cs->stack->flags & OPEN_APPEND ? 'A' : 'O')), cs->stack->name, cs->stack->out_file != stderr); op_list_to_buf('p', cs->stack->processes, cs->stack->processes); op_bool_to_buf('P', cs->stack->flags & PROCESS_ON); op_bool_to_buf('r', cs->stack->sub_level != 0); op_intf_to_buf('t', cs->stack->maxdepth, MAXDEPTH, TRACING); op_bool_to_buf('T', cs->stack->flags & TIMESTAMP_ON); op_bool_to_buf('S', cs->stack->flags & SANITY_CHECK_ON); *buf= '\0'; return 0; overflow: *end++= '.'; *end++= '.'; *end++= '.'; *end= '\0'; return 1; } #undef char_to_buf #undef str_to_buf #undef list_to_buf #undef int_to_buf #undef colon_to_buf #undef op_int_to_buf #undef op_intf_to_buf #undef op_str_to_buf #undef op_list_to_buf #undef op_bool_to_buf /* * FUNCTION * * _db_explain_init_ explain initial debugger settings * * DESCRIPTION * see _db_explain_ */ int _db_explain_init_(char *buf, size_t len) { CODE_STATE cs; bzero((uchar*) &cs,sizeof(cs)); cs.stack=&init_settings; return _db_explain_(&cs, buf, len); } /* * FUNCTION * * _db_enter_ process entry point to user function * * SYNOPSIS * * VOID _db_enter_(_func_, _file_, _line_, * _sfunc_, _sfile_, _slevel_, _sframep_) * char *_func_; points to current function name * char *_file_; points to current file name * int _line_; called from source line number * char **_sfunc_; save previous _func_ * char **_sfile_; save previous _file_ * int *_slevel_; save previous nesting level * char ***_sframep_; save previous frame pointer * * DESCRIPTION * * Called at the beginning of each user function to tell * the debugger that a new function has been entered. * Note that the pointers to the previous user function * name and previous user file name are stored on the * caller's stack (this is why the ENTER macro must be * the first "executable" code in a function, since it * allocates these storage locations). The previous nesting * level is also stored on the callers stack for internal * self consistency checks. * * Also prints a trace line if tracing is enabled and * increments the current function nesting depth. * * Note that this mechanism allows the debugger to know * what the current user function is at all times, without * maintaining an internal stack for the function names. * */ void _db_enter_(const char *_func_, const char *_file_, uint _line_, const char **_sfunc_, const char **_sfile_, uint *_slevel_, char ***_sframep_ __attribute__((unused))) { int save_errno=errno; CODE_STATE *cs=0; get_code_state_or_return; *_sfunc_= cs->func; *_sfile_= cs->file; cs->func= _func_; cs->file= _file_; *_slevel_= ++cs->level; #ifndef THREAD *_sframep_= cs->framep; cs->framep= (char **) _sframep_; if (DoProfile(cs)) { long stackused; if (*cs->framep == NULL) stackused= 0; else { stackused= ((long)(*cs->framep)) - ((long)(cs->framep)); stackused= stackused > 0 ? stackused : -stackused; } (void) fprintf(cs->stack->prof_file, PROF_EFMT , Clock(), cs->func); #ifdef AUTOS_REVERSE (void) fprintf(cs->stack->prof_file, PROF_SFMT, cs->framep, stackused, *_sfunc_); #else (void) fprintf(cs->stack->prof_file, PROF_SFMT, (ulong) cs->framep, stackused, cs->func); #endif (void) fflush(cs->stack->prof_file); } #endif if (DoTrace(cs)) { if (!cs->locked) pthread_mutex_lock(&THR_LOCK_dbug); DoPrefix(cs, _line_); Indent(cs, cs->level); (void) fprintf(cs->stack->out_file, ">%s\n", cs->func); dbug_flush(cs); /* This does a unlock */ } #ifdef SAFEMALLOC if (cs->stack->flags & SANITY_CHECK_ON) if (_sanity(_file_,_line_)) /* Check of safemalloc */ cs->stack->flags &= ~SANITY_CHECK_ON; #endif errno=save_errno; } /* * FUNCTION * * _db_return_ process exit from user function * * SYNOPSIS * * VOID _db_return_(_line_, _sfunc_, _sfile_, _slevel_) * int _line_; current source line number * char **_sfunc_; where previous _func_ is to be retrieved * char **_sfile_; where previous _file_ is to be retrieved * int *_slevel_; where previous level was stashed * * DESCRIPTION * * Called just before user function executes an explicit or implicit * return. Prints a trace line if trace is enabled, decrements * the current nesting level, and restores the current function and * file names from the defunct function's stack. * */ /* helper macro */ void _db_return_(uint _line_, const char **_sfunc_, const char **_sfile_, uint *_slevel_) { int save_errno=errno; CODE_STATE *cs=0; get_code_state_or_return; if (cs->level != (int) *_slevel_) { if (!cs->locked) pthread_mutex_lock(&THR_LOCK_dbug); (void) fprintf(cs->stack->out_file, ERR_MISSING_RETURN, cs->process, cs->func); dbug_flush(cs); } else { #ifdef SAFEMALLOC if (cs->stack->flags & SANITY_CHECK_ON) { if (_sanity(*_sfile_,_line_)) cs->stack->flags &= ~SANITY_CHECK_ON; } #endif #ifndef THREAD if (DoProfile(cs)) (void) fprintf(cs->stack->prof_file, PROF_XFMT, Clock(), cs->func); #endif if (DoTrace(cs)) { if (!cs->locked) pthread_mutex_lock(&THR_LOCK_dbug); DoPrefix(cs, _line_); Indent(cs, cs->level); (void) fprintf(cs->stack->out_file, "<%s\n", cs->func); dbug_flush(cs); } } cs->level= *_slevel_-1; cs->func= *_sfunc_; cs->file= *_sfile_; #ifndef THREAD if (cs->framep != NULL) cs->framep= (char **) *cs->framep; #endif errno=save_errno; } /* * FUNCTION * * _db_pargs_ log arguments for subsequent use by _db_doprnt_() * * SYNOPSIS * * VOID _db_pargs_(_line_, keyword) * int _line_; * char *keyword; * * DESCRIPTION * * The new universal printing macro DBUG_PRINT, which replaces * all forms of the DBUG_N macros, needs two calls to runtime * support routines. The first, this function, remembers arguments * that are used by the subsequent call to _db_doprnt_(). * */ void _db_pargs_(uint _line_, const char *keyword) { CODE_STATE *cs=0; get_code_state_or_return; cs->u_line= _line_; cs->u_keyword= keyword; } /* * FUNCTION * * _db_doprnt_ handle print of debug lines * * SYNOPSIS * * VOID _db_doprnt_(format, va_alist) * char *format; * va_dcl; * * DESCRIPTION * * When invoked via one of the DBUG macros, tests the current keyword * set by calling _db_pargs_() to see if that macro has been selected * for processing via the debugger control string, and if so, handles * printing of the arguments via the format string. The line number * of the DBUG macro in the source is found in u_line. * * Note that the format string SHOULD NOT include a terminating * newline, this is supplied automatically. * */ #include void _db_doprnt_(const char *format,...) { va_list args; CODE_STATE *cs=0; get_code_state_or_return; va_start(args,format); if (_db_keyword_(cs, cs->u_keyword)) { int save_errno=errno; if (!cs->locked) pthread_mutex_lock(&THR_LOCK_dbug); DoPrefix(cs, cs->u_line); if (TRACING) Indent(cs, cs->level + 1); else (void) fprintf(cs->stack->out_file, "%s: ", cs->func); (void) fprintf(cs->stack->out_file, "%s: ", cs->u_keyword); (void) vfprintf(cs->stack->out_file, format, args); (void) fputc('\n',cs->stack->out_file); dbug_flush(cs); errno=save_errno; } va_end(args); } /* * FUNCTION * * _db_dump_ dump a string in hex * * SYNOPSIS * * void _db_dump_(_line_,keyword,memory,length) * int _line_; current source line number * char *keyword; * char *memory; Memory to print * int length; Bytes to print * * DESCRIPTION * Dump N characters in a binary array. * Is used to examine corrputed memory or arrays. */ void _db_dump_(uint _line_, const char *keyword, const unsigned char *memory, size_t length) { int pos; char dbuff[90]; CODE_STATE *cs=0; get_code_state_or_return; if (_db_keyword_(cs, keyword)) { if (!cs->locked) pthread_mutex_lock(&THR_LOCK_dbug); DoPrefix(cs, _line_); if (TRACING) { Indent(cs, cs->level + 1); pos= min(max(cs->level-cs->stack->sub_level,0)*INDENT,80); } else { fprintf(cs->stack->out_file, "%s: ", cs->func); } sprintf(dbuff,"%s: Memory: 0x%lx Bytes: (%ld)\n", keyword, (ulong) memory, (long) length); (void) fputs(dbuff,cs->stack->out_file); pos=0; while (length-- > 0) { uint tmp= *((unsigned char*) memory++); if ((pos+=3) >= 80) { fputc('\n',cs->stack->out_file); pos=3; } fputc(_dig_vec_upper[((tmp >> 4) & 15)], cs->stack->out_file); fputc(_dig_vec_upper[tmp & 15], cs->stack->out_file); fputc(' ',cs->stack->out_file); } (void) fputc('\n',cs->stack->out_file); dbug_flush(cs); } } /* * FUNCTION * * ListAdd add to the list modifiers from debug control string * * SYNOPSIS * * static struct link *ListAdd(listp, ctlp, end) * struct link *listp; * char *ctlp; * char *end; * * DESCRIPTION * * Given pointer to a comma separated list of strings in "cltp", * parses the list, and adds it to listp, returning a pointer * to the new list * * Note that since each link is added at the head of the list, * the final list will be in "reverse order", which is not * significant for our usage here. * */ static struct link *ListAdd(struct link *head, const char *ctlp, const char *end) { const char *start; struct link *new_malloc; int len; while (ctlp < end) { start= ctlp; while (ctlp < end && *ctlp != ',') ctlp++; len=ctlp-start; new_malloc= (struct link *) DbugMalloc(sizeof(struct link)+len); memcpy(new_malloc->str, start, len); new_malloc->str[len]=0; new_malloc->next_link= head; head= new_malloc; ctlp++; } return head; } /* * FUNCTION * * ListDel remove from the list modifiers in debug control string * * SYNOPSIS * * static struct link *ListDel(listp, ctlp, end) * struct link *listp; * char *ctlp; * char *end; * * DESCRIPTION * * Given pointer to a comma separated list of strings in "cltp", * parses the list, and removes these strings from the listp, * returning a pointer to the new list. * */ static struct link *ListDel(struct link *head, const char *ctlp, const char *end) { const char *start; struct link **cur; int len; while (ctlp < end) { start= ctlp; while (ctlp < end && *ctlp != ',') ctlp++; len=ctlp-start; cur=&head; do { while (*cur && !strncmp((*cur)->str, start, len)) { struct link *delme=*cur; *cur=(*cur)->next_link; free((void*) delme); } } while (*cur && *(cur=&((*cur)->next_link))); } return head; } /* * FUNCTION * * ListCopy make a copy of the list * * SYNOPSIS * * static struct link *ListCopy(orig) * struct link *orig; * * DESCRIPTION * * Given pointer to list, which contains a copy of every element from * the original list. * * the orig pointer can be NULL * * Note that since each link is added at the head of the list, * the final list will be in "reverse order", which is not * significant for our usage here. * */ static struct link *ListCopy(struct link *orig) { struct link *new_malloc; struct link *head; int len; head= NULL; while (orig != NULL) { len= strlen(orig->str); new_malloc= (struct link *) DbugMalloc(sizeof(struct link)+len); memcpy(new_malloc->str, orig->str, len); new_malloc->str[len]= 0; new_malloc->next_link= head; head= new_malloc; orig= orig->next_link; } return head; } /* * FUNCTION * * InList test a given string for member of a given list * * SYNOPSIS * * static BOOLEAN InList(linkp, cp) * struct link *linkp; * char *cp; * * DESCRIPTION * * Tests the string pointed to by "cp" to determine if it is in * the list pointed to by "linkp". Linkp points to the first * link in the list. If linkp is NULL then the string is treated * as if it is in the list (I.E all strings are in the null list). * This may seem rather strange at first but leads to the desired * operation if no list is given. The net effect is that all * strings will be accepted when there is no list, and when there * is a list, only those strings in the list will be accepted. * */ static BOOLEAN InList(struct link *linkp, const char *cp) { REGISTER struct link *scan; REGISTER BOOLEAN result; if (linkp == NULL) result= TRUE; else { result= FALSE; for (scan= linkp; scan != NULL; scan= scan->next_link) { if (!strcmp(scan->str, cp)) { result= TRUE; break; } } } return result; } /* * FUNCTION * * PushState push current settings onto stack and set up new one * * SYNOPSIS * * static VOID PushState() * * DESCRIPTION * * Pushes the current settings on the settings stack, and creates * a new settings. The new settings is NOT initialized * * The settings stack is a linked list of settings, with the new * settings added at the head. This allows the stack to grow * to the limits of memory if necessary. * */ static void PushState(CODE_STATE *cs) { struct settings *new_malloc; new_malloc= (struct settings *) DbugMalloc(sizeof(struct settings)); new_malloc->next= cs->stack; new_malloc->out_file= NULL; cs->stack= new_malloc; } /* * FUNCTION * * FreeState Free memory associated with a struct state. * * SYNOPSIS * * static void FreeState (state) * struct state *state; * int free_state; * * DESCRIPTION * * Deallocates the memory allocated for various information in a * state. If free_state is set, also free 'state' * */ static void FreeState(CODE_STATE *cs, struct settings *state, int free_state) { if (!is_shared(state, keywords)) FreeList(state->keywords); if (!is_shared(state, functions)) FreeList(state->functions); if (!is_shared(state, processes)) FreeList(state->processes); if (!is_shared(state, p_functions)) FreeList(state->p_functions); if (!is_shared(state, out_file)) DBUGCloseFile(cs, state->out_file); (void) fflush(cs->stack->out_file); if (state->prof_file) DBUGCloseFile(cs, state->prof_file); if (free_state) free((void*) state); } /* * FUNCTION * * _db_end_ End debugging, freeing state stack memory. * * SYNOPSIS * * static VOID _db_end_ () * * DESCRIPTION * * Ends debugging, de-allocating the memory allocated to the * state stack. * * To be called at the very end of the program. * */ void _db_end_() { struct settings *discard; static struct settings tmp; CODE_STATE *cs=0; get_code_state_or_return; while ((discard= cs->stack)) { if (discard == &init_settings) break; cs->stack= discard->next; FreeState(cs, discard, 1); } tmp= init_settings; /* Use mutex lock to make it less likely anyone access out_file */ pthread_mutex_lock(&THR_LOCK_dbug); init_settings.flags= OPEN_APPEND; init_settings.out_file= stderr; init_settings.prof_file= stderr; init_settings.maxdepth= 0; init_settings.delay= 0; init_settings.sub_level= 0; init_settings.functions= 0; init_settings.p_functions= 0; init_settings.keywords= 0; init_settings.processes= 0; pthread_mutex_unlock(&THR_LOCK_dbug); FreeState(cs, &tmp, 0); } /* * FUNCTION * * DoTrace check to see if tracing is current enabled * * SYNOPSIS * * static BOOLEAN DoTrace(stack) * * DESCRIPTION * * Checks to see if tracing is enabled based on whether the * user has specified tracing, the maximum trace depth has * not yet been reached, the current function is selected, * and the current process is selected. Returns TRUE if * tracing is enabled, FALSE otherwise. * */ static BOOLEAN DoTrace(CODE_STATE *cs) { return (TRACING && cs->level <= cs->stack->maxdepth && InList(cs->stack->functions, cs->func) && InList(cs->stack->processes, cs->process)); } /* * FUNCTION * * DoProfile check to see if profiling is current enabled * * SYNOPSIS * * static BOOLEAN DoProfile() * * DESCRIPTION * * Checks to see if profiling is enabled based on whether the * user has specified profiling, the maximum trace depth has * not yet been reached, the current function is selected, * and the current process is selected. Returns TRUE if * profiling is enabled, FALSE otherwise. * */ #ifndef THREAD static BOOLEAN DoProfile(CODE_STATE *cs) { return PROFILING && cs->level <= cs->stack->maxdepth && InList(cs->stack->p_functions, cs->func) && InList(cs->stack->processes, cs->process); } #endif FILE *_db_fp_(void) { CODE_STATE *cs=0; get_code_state_or_return NULL; return cs->stack->out_file; } /* * FUNCTION * * _db_strict_keyword_ test keyword for member of keyword list * * SYNOPSIS * * BOOLEAN _db_strict_keyword_(keyword) * char *keyword; * * DESCRIPTION * * Similar to _db_keyword_, but keyword is NOT accepted if keyword list * is empty. Used in DBUG_EXECUTE_IF() - for actions that must not be * executed by default. * * Returns TRUE if keyword accepted, FALSE otherwise. * */ BOOLEAN _db_strict_keyword_(const char *keyword) { CODE_STATE *cs=0; get_code_state_or_return FALSE; if (!DEBUGGING || cs->stack->keywords == NULL) return FALSE; return _db_keyword_(cs, keyword); } /* * FUNCTION * * _db_keyword_ test keyword for member of keyword list * * SYNOPSIS * * BOOLEAN _db_keyword_(keyword) * char *keyword; * * DESCRIPTION * * Test a keyword to determine if it is in the currently active * keyword list. As with the function list, a keyword is accepted * if the list is null, otherwise it must match one of the list * members. When debugging is not on, no keywords are accepted. * After the maximum trace level is exceeded, no keywords are * accepted (this behavior subject to change). Additionally, * the current function and process must be accepted based on * their respective lists. * * Returns TRUE if keyword accepted, FALSE otherwise. * */ BOOLEAN _db_keyword_(CODE_STATE *cs, const char *keyword) { get_code_state_or_return FALSE; return (DEBUGGING && (!TRACING || cs->level <= cs->stack->maxdepth) && InList(cs->stack->functions, cs->func) && InList(cs->stack->keywords, keyword) && InList(cs->stack->processes, cs->process)); } /* * FUNCTION * * _db_keywords_ test keyword formed by a set of strings for member * of keyword list * * DESCRIPTION * * This function is similar to _db_keyword but receives a set of strings to * be concatenated in order to make the keyword to be compared. */ BOOLEAN _db_keywords_(const char *function, const char *type) { char dest[_DBUG_MAX_FUNC_NAME_ + 1]; strxnmov(dest, _DBUG_MAX_FUNC_NAME_, function, type, NULL); return _db_strict_keyword_(dest); } /* * FUNCTION * * Indent indent a line to the given indentation level * * SYNOPSIS * * static VOID Indent(indent) * int indent; * * DESCRIPTION * * Indent a line to the given level. Note that this is * a simple minded but portable implementation. * There are better ways. * * Also, the indent must be scaled by the compile time option * of character positions per nesting level. * */ static void Indent(CODE_STATE *cs, int indent) { REGISTER int count; indent= max(indent-1-cs->stack->sub_level,0)*INDENT; for (count= 0; count < indent ; count++) { if ((count % INDENT) == 0) fputc('|',cs->stack->out_file); else fputc(' ',cs->stack->out_file); } } /* * FUNCTION * * FreeList free all memory associated with a linked list * * SYNOPSIS * * static VOID FreeList(linkp) * struct link *linkp; * * DESCRIPTION * * Given pointer to the head of a linked list, frees all * memory held by the list and the members of the list. * */ static void FreeList(struct link *linkp) { REGISTER struct link *old; while (linkp != NULL) { old= linkp; linkp= linkp->next_link; free((void*) old); } } /* * FUNCTION * * DoPrefix print debugger line prefix prior to indentation * * SYNOPSIS * * static VOID DoPrefix(_line_) * int _line_; * * DESCRIPTION * * Print prefix common to all debugger output lines, prior to * doing indentation if necessary. Print such information as * current process name, current source file name and line number, * and current function nesting depth. * */ static void DoPrefix(CODE_STATE *cs, uint _line_) { cs->lineno++; if (cs->stack->flags & PID_ON) { #ifdef THREAD (void) fprintf(cs->stack->out_file, "%-7s: ", my_thread_name()); #else (void) fprintf(cs->stack->out_file, "%5d: ", (int) getpid()); #endif } if (cs->stack->flags & NUMBER_ON) (void) fprintf(cs->stack->out_file, "%5d: ", cs->lineno); if (cs->stack->flags & TIMESTAMP_ON) { #ifdef __WIN__ /* FIXME This doesn't give microseconds as in Unix case, and the resolution is in system ticks, 10 ms intervals. See my_getsystime.c for high res */ SYSTEMTIME loc_t; GetLocalTime(&loc_t); (void) fprintf (cs->stack->out_file, /* "%04d-%02d-%02d " */ "%02d:%02d:%02d.%06d ", /*tm_p->tm_year + 1900, tm_p->tm_mon + 1, tm_p->tm_mday,*/ loc_t.wHour, loc_t.wMinute, loc_t.wSecond, loc_t.wMilliseconds); #else struct timeval tv; struct tm *tm_p; if (gettimeofday(&tv, NULL) != -1) { if ((tm_p= localtime((const time_t *)&tv.tv_sec))) { (void) fprintf (cs->stack->out_file, /* "%04d-%02d-%02d " */ "%02d:%02d:%02d.%06d ", /*tm_p->tm_year + 1900, tm_p->tm_mon + 1, tm_p->tm_mday,*/ tm_p->tm_hour, tm_p->tm_min, tm_p->tm_sec, (int) (tv.tv_usec)); } } #endif } if (cs->stack->flags & PROCESS_ON) (void) fprintf(cs->stack->out_file, "%s: ", cs->process); if (cs->stack->flags & FILE_ON) (void) fprintf(cs->stack->out_file, "%14s: ", BaseName(cs->file)); if (cs->stack->flags & LINE_ON) (void) fprintf(cs->stack->out_file, "%5d: ", _line_); if (cs->stack->flags & DEPTH_ON) (void) fprintf(cs->stack->out_file, "%4d: ", cs->level); } /* * FUNCTION * * DBUGOpenFile open new output stream for debugger output * * SYNOPSIS * * static VOID DBUGOpenFile(name) * char *name; * * DESCRIPTION * * Given name of a new file (or "-" for stdout) opens the file * and sets the output stream to the new file. * */ static void DBUGOpenFile(CODE_STATE *cs, const char *name,const char *end,int append) { REGISTER FILE *fp; REGISTER BOOLEAN newfile; if (name != NULL) { if (end) { int len=end-name; memcpy(cs->stack->name, name, len); cs->stack->name[len]=0; } else strmov(cs->stack->name,name); name=cs->stack->name; if (strcmp(name, "-") == 0) { cs->stack->out_file= stdout; cs->stack->flags |= FLUSH_ON_WRITE; cs->stack->name[0]=0; } else { if (!Writable(name)) { (void) fprintf(stderr, ERR_OPEN, cs->process, name); perror(""); fflush(stderr); } else { newfile= !EXISTS(name); if (!(fp= fopen(name, append ? "a+" : "w"))) { (void) fprintf(stderr, ERR_OPEN, cs->process, name); perror(""); fflush(stderr); } else { cs->stack->out_file= fp; if (newfile) { ChangeOwner(cs, name); } } } } } } /* * FUNCTION * * OpenProfile open new output stream for profiler output * * SYNOPSIS * * static FILE *OpenProfile(name) * char *name; * * DESCRIPTION * * Given name of a new file, opens the file * and sets the profiler output stream to the new file. * * It is currently unclear whether the prefered behavior is * to truncate any existing file, or simply append to it. * The latter behavior would be desirable for collecting * accumulated runtime history over a number of separate * runs. It might take some changes to the analyzer program * though, and the notes that Binayak sent with the profiling * diffs indicated that append was the normal mode, but this * does not appear to agree with the actual code. I haven't * investigated at this time [fnf; 24-Jul-87]. */ #ifndef THREAD static FILE *OpenProfile(CODE_STATE *cs, const char *name) { REGISTER FILE *fp; REGISTER BOOLEAN newfile; fp=0; if (!Writable(name)) { (void) fprintf(cs->stack->out_file, ERR_OPEN, cs->process, name); perror(""); (void) Delay(cs->stack->delay); } else { newfile= !EXISTS(name); if (!(fp= fopen(name, "w"))) { (void) fprintf(cs->stack->out_file, ERR_OPEN, cs->process, name); perror(""); } else { cs->stack->prof_file= fp; if (newfile) { ChangeOwner(cs, name); } } } return fp; } #endif /* * FUNCTION * * DBUGCloseFile close the debug output stream * * SYNOPSIS * * static VOID DBUGCloseFile(fp) * FILE *fp; * * DESCRIPTION * * Closes the debug output stream unless it is standard output * or standard error. * */ static void DBUGCloseFile(CODE_STATE *cs, FILE *fp) { if (fp != stderr && fp != stdout && fclose(fp) == EOF) { pthread_mutex_lock(&THR_LOCK_dbug); (void) fprintf(cs->stack->out_file, ERR_CLOSE, cs->process); perror(""); dbug_flush(cs); } } /* * FUNCTION * * DbugExit print error message and exit * * SYNOPSIS * * static VOID DbugExit(why) * char *why; * * DESCRIPTION * * Prints error message using current process name, the reason for * aborting (typically out of memory), and exits with status 1. * This should probably be changed to use a status code * defined in the user's debugger include file. * */ static void DbugExit(const char *why) { CODE_STATE *cs=code_state(); (void) fprintf(stderr, ERR_ABORT, cs ? cs->process : "(null)", why); (void) fflush(stderr); exit(1); } /* * FUNCTION * * DbugMalloc allocate memory for debugger runtime support * * SYNOPSIS * * static long *DbugMalloc(size) * int size; * * DESCRIPTION * * Allocate more memory for debugger runtime support functions. * Failure to to allocate the requested number of bytes is * immediately fatal to the current process. This may be * rather unfriendly behavior. It might be better to simply * print a warning message, freeze the current debugger cs, * and continue execution. * */ static char *DbugMalloc(size_t size) { register char *new_malloc; if (!(new_malloc= (char*) malloc(size))) DbugExit("out of memory"); return new_malloc; } /* * strtok lookalike - splits on ':', magically handles ::, :\ and :/ */ static const char *DbugStrTok(const char *s) { while (s[0] && (s[0] != ':' || (s[1] == '\\' || s[1] == '/' || (s[1] == ':' && s++)))) s++; return s; } /* * FUNCTION * * BaseName strip leading pathname components from name * * SYNOPSIS * * static char *BaseName(pathname) * char *pathname; * * DESCRIPTION * * Given pointer to a complete pathname, locates the base file * name at the end of the pathname and returns a pointer to * it. * */ static const char *BaseName(const char *pathname) { register const char *base; base= strrchr(pathname, FN_LIBCHAR); if (base++ == NullS) base= pathname; return base; } /* * FUNCTION * * Writable test to see if a pathname is writable/creatable * * SYNOPSIS * * static BOOLEAN Writable(pathname) * char *pathname; * * DESCRIPTION * * Because the debugger might be linked in with a program that * runs with the set-uid-bit (suid) set, we have to be careful * about opening a user named file for debug output. This consists * of checking the file for write access with the real user id, * or checking the directory where the file will be created. * * Returns TRUE if the user would normally be allowed write or * create access to the named file. Returns FALSE otherwise. * */ #ifndef Writable static BOOLEAN Writable(const char *pathname) { REGISTER BOOLEAN granted; REGISTER char *lastslash; granted= FALSE; if (EXISTS(pathname)) { if (WRITABLE(pathname)) granted= TRUE; } else { lastslash= strrchr(pathname, '/'); if (lastslash != NULL) *lastslash= '\0'; else pathname= "."; if (WRITABLE(pathname)) granted= TRUE; if (lastslash != NULL) *lastslash= '/'; } return granted; } #endif /* * FUNCTION * * ChangeOwner change owner to real user for suid programs * * SYNOPSIS * * static VOID ChangeOwner(pathname) * * DESCRIPTION * * For unix systems, change the owner of the newly created debug * file to the real owner. This is strictly for the benefit of * programs that are running with the set-user-id bit set. * * Note that at this point, the fact that pathname represents * a newly created file has already been established. If the * program that the debugger is linked to is not running with * the suid bit set, then this operation is redundant (but * harmless). * */ #ifndef ChangeOwner static void ChangeOwner(CODE_STATE *cs, char *pathname) { if (chown(pathname, getuid(), getgid()) == -1) { (void) fprintf(stderr, ERR_CHOWN, cs->process, pathname); perror(""); (void) fflush(stderr); } } #endif /* * FUNCTION * * _db_setjmp_ save debugger environment * * SYNOPSIS * * VOID _db_setjmp_() * * DESCRIPTION * * Invoked as part of the user's DBUG_SETJMP macro to save * the debugger environment in parallel with saving the user's * environment. * */ #ifdef HAVE_LONGJMP EXPORT void _db_setjmp_() { CODE_STATE *cs=0; get_code_state_or_return; cs->jmplevel= cs->level; cs->jmpfunc= cs->func; cs->jmpfile= cs->file; } /* * FUNCTION * * _db_longjmp_ restore previously saved debugger environment * * SYNOPSIS * * VOID _db_longjmp_() * * DESCRIPTION * * Invoked as part of the user's DBUG_LONGJMP macro to restore * the debugger environment in parallel with restoring the user's * previously saved environment. * */ EXPORT void _db_longjmp_() { CODE_STATE *cs=0; get_code_state_or_return; cs->level= cs->jmplevel; if (cs->jmpfunc) cs->func= cs->jmpfunc; if (cs->jmpfile) cs->file= cs->jmpfile; } #endif /* * FUNCTION * * perror perror simulation for systems that don't have it * * SYNOPSIS * * static VOID perror(s) * char *s; * * DESCRIPTION * * Perror produces a message on the standard error stream which * provides more information about the library or system error * just encountered. The argument string s is printed, followed * by a ':', a blank, and then a message and a newline. * * An undocumented feature of the unix perror is that if the string * 's' is a null string (NOT a NULL pointer!), then the ':' and * blank are not printed. * * This version just complains about an "unknown system error". * */ #ifndef HAVE_PERROR static void perror(s) char *s; { if (s && *s != '\0') (void) fprintf(stderr, "%s: ", s); (void) fprintf(stderr, "\n"); } #endif /* HAVE_PERROR */ /* flush dbug-stream, free mutex lock & wait delay */ /* This is because some systems (MSDOS!!) dosn't flush fileheader */ /* and dbug-file isn't readable after a system crash !! */ static void dbug_flush(CODE_STATE *cs) { #ifndef THREAD if (cs->stack->flags & FLUSH_ON_WRITE) #endif { (void) fflush(cs->stack->out_file); if (cs->stack->delay) (void) Delay(cs->stack->delay); } if (!cs->locked) pthread_mutex_unlock(&THR_LOCK_dbug); } /* dbug_flush */ void _db_lock_file_() { CODE_STATE *cs=0; get_code_state_or_return; pthread_mutex_lock(&THR_LOCK_dbug); cs->locked=1; } void _db_unlock_file_() { CODE_STATE *cs=0; get_code_state_or_return; cs->locked=0; pthread_mutex_unlock(&THR_LOCK_dbug); } const char* _db_get_func_(void) { CODE_STATE *cs= 0; get_code_state_or_return NULL; return cs->func; } /* * Here we need the definitions of the clock routine. Add your * own for whatever system that you have. */ #ifndef THREAD #if defined(HAVE_GETRUSAGE) #include #include /* extern int getrusage(int, struct rusage *); */ /* * Returns the user time in milliseconds used by this process so * far. */ static unsigned long Clock() { struct rusage ru; (void) getrusage(RUSAGE_SELF, &ru); return ru.ru_utime.tv_sec*1000 + ru.ru_utime.tv_usec/1000; } #elif defined(MSDOS) || defined(__WIN__) static ulong Clock() { return clock()*(1000/CLOCKS_PER_SEC); } #elif defined(amiga) struct DateStamp { /* Yes, this is a hack, but doing it right */ long ds_Days; /* is incredibly ugly without splitting this */ long ds_Minute; /* off into a separate file */ long ds_Tick; }; static int first_clock= TRUE; static struct DateStamp begin; static struct DateStamp elapsed; static unsigned long Clock() { register struct DateStamp *now; register unsigned long millisec= 0; extern VOID *AllocMem(); now= (struct DateStamp *) AllocMem((long) sizeof(struct DateStamp), 0L); if (now != NULL) { if (first_clock == TRUE) { first_clock= FALSE; (void) DateStamp(now); begin= *now; } (void) DateStamp(now); millisec= 24 * 3600 * (1000 / HZ) * (now->ds_Days - begin.ds_Days); millisec += 60 * (1000 / HZ) * (now->ds_Minute - begin.ds_Minute); millisec += (1000 / HZ) * (now->ds_Tick - begin.ds_Tick); (void) FreeMem(now, (long) sizeof(struct DateStamp)); } return millisec; } #else static unsigned long Clock() { return 0; } #endif /* RUSAGE */ #endif /* THREADS */ #ifdef NO_VARARGS /* * Fake vfprintf for systems that don't support it. If this * doesn't work, you are probably SOL... */ static int vfprintf(stream, format, ap) FILE *stream; char *format; va_list ap; { int rtnval; ARGS_DCL; ARG0= va_arg(ap, ARGS_TYPE); ARG1= va_arg(ap, ARGS_TYPE); ARG2= va_arg(ap, ARGS_TYPE); ARG3= va_arg(ap, ARGS_TYPE); ARG4= va_arg(ap, ARGS_TYPE); ARG5= va_arg(ap, ARGS_TYPE); ARG6= va_arg(ap, ARGS_TYPE); ARG7= va_arg(ap, ARGS_TYPE); ARG8= va_arg(ap, ARGS_TYPE); ARG9= va_arg(ap, ARGS_TYPE); rtnval= fprintf(stream, format, ARGS_LIST); return rtnval; } #endif /* NO_VARARGS */ #else /* * Dummy function, workaround for MySQL bug#14420 related * build failure on a platform where linking with an empty * archive fails. * * This block can be removed as soon as a fix for bug#14420 * is implemented. */ int i_am_a_dummy_function() { return 0; } #endif