X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Ftrace%2Flib_trace.c;h=2c10b51d0170ab142e99807ea64c19638c8eb904;hp=19e9e451f97a52e843f1d5bbf8a33014fc9aa395;hb=c976a90788f3e50afc773670ff74c5270ecb48df;hpb=55ccd2b959766810cf7db8d1c4462f338ce0afc8 diff --git a/ncurses/trace/lib_trace.c b/ncurses/trace/lib_trace.c index 19e9e451..2c10b51d 100644 --- a/ncurses/trace/lib_trace.c +++ b/ncurses/trace/lib_trace.c @@ -1,5 +1,6 @@ /**************************************************************************** - * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. * + * Copyright 2018-2019,2020 Thomas E. Dickey * + * Copyright 1998-2016,2017 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * @@ -30,10 +31,16 @@ * Author: Zeyd M. Ben-Halim 1992,1995 * * and: Eric S. Raymond * * and: Thomas E. Dickey 1996-on * + * and: Juergen Pfeifer * ****************************************************************************/ /* * lib_trace.c - Tracing/Debugging routines + * + * The _tracef() function is originally from pcurses (by Pavel Curtis) in 1982. + * pcurses allowed one to enable/disable tracing using traceon() and traceoff() + * functions. ncurses provides a trace() function which allows one to + * selectively enable or disable several tracing features. */ #include @@ -41,86 +48,150 @@ #include -MODULE_ID("$Id: lib_trace.c,v 1.58 2005/04/16 16:15:24 tom Exp $") +MODULE_ID("$Id: lib_trace.c,v 1.95 2020/02/02 23:34:34 tom Exp $") NCURSES_EXPORT_VAR(unsigned) _nc_tracing = 0; /* always define this */ #ifdef TRACE -NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = ""; -NCURSES_EXPORT_VAR(long) _nc_outchars = 0; - -static FILE *tracefp = 0; /* default to writing to stderr */ +#if USE_REENTRANT +NCURSES_EXPORT(const char *) +NCURSES_PUBLIC_VAR(_nc_tputs_trace) (void) +{ + return CURRENT_SCREEN ? CURRENT_SCREEN->_tputs_trace : _nc_prescreen._tputs_trace; +} +NCURSES_EXPORT(long) +NCURSES_PUBLIC_VAR(_nc_outchars) (void) +{ + return CURRENT_SCREEN ? CURRENT_SCREEN->_outchars : _nc_prescreen._outchars; +} NCURSES_EXPORT(void) -trace(const unsigned int tracelevel) +_nc_set_tputs_trace(const char *s) +{ + if (CURRENT_SCREEN) + CURRENT_SCREEN->_tputs_trace = s; + else + _nc_prescreen._tputs_trace = s; +} +NCURSES_EXPORT(void) +_nc_count_outchars(long increment) { - static bool been_here = FALSE; - static char my_name[PATH_MAX]; + if (CURRENT_SCREEN) + CURRENT_SCREEN->_outchars += increment; + else + _nc_prescreen._outchars += increment; +} +#else +NCURSES_EXPORT_VAR(const char *) _nc_tputs_trace = ""; +NCURSES_EXPORT_VAR(long) _nc_outchars = 0; +#endif - if ((tracefp == 0) && tracelevel) { - const char *mode = been_here ? "ab" : "wb"; +#define MyFP _nc_globals.trace_fp +#define MyFD _nc_globals.trace_fd +#define MyInit _nc_globals.trace_opened +#define MyPath _nc_globals.trace_fname +#define MyLevel _nc_globals.trace_level +#define MyNested _nc_globals.nested_tracef +#endif /* TRACE */ - if (*my_name == '\0') { - if (getcwd(my_name, sizeof(my_name) - 10) == 0) { - perror("curses: Can't get working directory"); - exit(EXIT_FAILURE); +NCURSES_EXPORT(unsigned) +curses_trace(unsigned tracelevel) +{ + unsigned result; +#if defined(TRACE) + result = _nc_tracing; + if ((MyFP == 0) && tracelevel) { + MyInit = TRUE; + if (MyFD >= 0) { + MyFP = fdopen(MyFD, BIN_W); + } else { + if (MyPath[0] == '\0') { + size_t size = sizeof(MyPath) - 12; + if (getcwd(MyPath, size) == 0) { + perror("curses: Can't get working directory"); + exit(EXIT_FAILURE); + } + MyPath[size] = '\0'; + assert(strlen(MyPath) <= size); + _nc_STRCAT(MyPath, "/trace", sizeof(MyPath)); + if (_nc_is_dir_path(MyPath)) { + _nc_STRCAT(MyPath, ".log", sizeof(MyPath)); + } + } + if (_nc_access(MyPath, W_OK) < 0 + || (MyFD = open(MyPath, O_CREAT | O_EXCL | O_RDWR, 0600)) < 0 + || (MyFP = fdopen(MyFD, BIN_W)) == 0) { + ; /* EMPTY */ } - strcat(my_name, "/trace"); } - - been_here = TRUE; _nc_tracing = tracelevel; - if (_nc_access(my_name, W_OK) < 0 - || (tracefp = fopen(my_name, mode)) == 0) { - perror("curses: Can't open 'trace' file"); - exit(EXIT_FAILURE); - } /* Try to set line-buffered mode, or (failing that) unbuffered, * so that the trace-output gets flushed automatically at the * end of each line. This is useful in case the program dies. */ + if (MyFP != 0) { #if HAVE_SETVBUF /* ANSI */ - (void) setvbuf(tracefp, (char *) 0, _IOLBF, 0); -#elif HAVE_SETBUF /* POSIX */ - (void) setbuffer(tracefp, (char *) 0); + (void) setvbuf(MyFP, (char *) 0, _IOLBF, (size_t) 0); +#elif HAVE_SETBUF /* POSIX */ + (void) setbuffer(MyFP, (char *) 0); #endif + } _tracef("TRACING NCURSES version %s.%d (tracelevel=%#x)", NCURSES_VERSION, NCURSES_VERSION_PATCH, tracelevel); } else if (tracelevel == 0) { - if (tracefp != 0) { - fclose(tracefp); - tracefp = 0; + if (MyFP != 0) { + MyFD = dup(MyFD); /* allow reopen of same file */ + fclose(MyFP); + MyFP = 0; } _nc_tracing = tracelevel; } else if (_nc_tracing != tracelevel) { _nc_tracing = tracelevel; _tracef("tracelevel=%#x", tracelevel); } +#else + (void) tracelevel; + result = 0; +#endif + return result; } +#if defined(TRACE) NCURSES_EXPORT(void) -_tracef(const char *fmt,...) +trace(const unsigned int tracelevel) +{ + curses_trace(tracelevel); +} + +static void +_nc_va_tracef(const char *fmt, va_list ap) { static const char Called[] = T_CALLED(""); static const char Return[] = T_RETURN(""); - static int level; - va_list ap; + bool before = FALSE; bool after = FALSE; unsigned doit = _nc_tracing; int save_err = errno; + FILE *fp = MyFP; + +#ifdef TRACE + /* verbose-trace in the command-line utilities relies on this */ + if (fp == 0 && !MyInit && _nc_tracing >= DEBUG_LEVEL(1)) + fp = stderr; +#endif if (strlen(fmt) >= sizeof(Called) - 1) { if (!strncmp(fmt, Called, sizeof(Called) - 1)) { before = TRUE; - level++; + MyLevel++; } else if (!strncmp(fmt, Return, sizeof(Return) - 1)) { after = TRUE; } if (before || after) { - if ((level <= 1) + if ((MyLevel <= 1) || (doit & TRACE_ICALLS) != 0) doit &= (TRACE_CALLS | TRACE_CCALLS); else @@ -128,34 +199,68 @@ _tracef(const char *fmt,...) } } - if (doit != 0) { - if (tracefp == 0) - tracefp = stderr; + if (doit != 0 && fp != 0) { +#ifdef USE_PTHREADS + /* + * TRACE_ICALLS is "really" needed to show normal use with threaded + * applications, since anything can be running during a napms(), + * making it appear in the hierarchical trace as it other functions + * are being called. + * + * Rather than add the complication of a per-thread stack, just + * show the thread-id in each line of the trace. + */ +# if USE_WEAK_SYMBOLS + if ((pthread_self)) +# endif +#ifdef _WIN32 + fprintf(fp, "%#lx:", (long) (intptr_t) pthread_self().p); +#else + fprintf(fp, "%#lx:", (long) (intptr_t) pthread_self()); +#endif +#endif if (before || after) { int n; - for (n = 1; n < level; n++) - fputs("+ ", tracefp); + for (n = 1; n < MyLevel; n++) + fputs("+ ", fp); } - va_start(ap, fmt); - vfprintf(tracefp, fmt, ap); - fputc('\n', tracefp); - va_end(ap); - fflush(tracefp); + vfprintf(fp, fmt, ap); + fputc('\n', fp); + fflush(fp); } - if (after && level) - level--; + if (after && MyLevel) + MyLevel--; + errno = save_err; } +NCURSES_EXPORT(void) +_tracef(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + _nc_va_tracef(fmt, ap); + va_end(ap); +} + /* Trace 'bool' return-values */ NCURSES_EXPORT(NCURSES_BOOL) -_nc_retrace_bool(NCURSES_BOOL code) +_nc_retrace_bool(int code) { T((T_RETURN("%s"), code ? "TRUE" : "FALSE")); return code; } +/* Trace 'char' return-values */ +NCURSES_EXPORT(char) +_nc_retrace_char(int code) +{ + T((T_RETURN("%c"), code)); + return (char) code; +} + /* Trace 'int' return-values */ NCURSES_EXPORT(int) _nc_retrace_int(int code) @@ -208,7 +313,7 @@ _nc_retrace_void_ptr(void *code) NCURSES_EXPORT(SCREEN *) _nc_retrace_sp(SCREEN *code) { - T((T_RETURN("%p"), code)); + T((T_RETURN("%p"), (void *) code)); return code; } @@ -216,7 +321,90 @@ _nc_retrace_sp(SCREEN *code) NCURSES_EXPORT(WINDOW *) _nc_retrace_win(WINDOW *code) { - T((T_RETURN("%p"), code)); + T((T_RETURN("%p"), (void *) code)); return code; } + +NCURSES_EXPORT(char *) +_nc_fmt_funcptr(char *target, const char *source, size_t size) +{ + size_t n; + char *dst = target; + bool leading = TRUE; + + union { + int value; + char bytes[sizeof(int)]; + } byteorder; + + byteorder.value = 0x1234; + + *dst++ = '0'; + *dst++ = 'x'; + + for (n = 0; n < size; ++n) { + unsigned ch = ((byteorder.bytes[0] == 0x34) + ? UChar(source[size - n - 1]) + : UChar(source[n])); + if (ch != 0 || (n + 1) >= size) + leading = FALSE; + if (!leading) { + _nc_SPRINTF(dst, _nc_SLIMIT(TR_FUNC_LEN - (dst - target)) + "%02x", ch & 0xff); + dst += 2; + } + } + *dst = '\0'; + return target; +} + +#if USE_REENTRANT +/* + * Check if the given trace-mask is enabled. + * + * This function may be called from within one of the functions that fills + * in parameters for _tracef(), but in that case we do not want to lock the + * mutex, since it is already locked. + */ +NCURSES_EXPORT(int) +_nc_use_tracef(unsigned mask) +{ + bool result = FALSE; + + _nc_lock_global(tst_tracef); + if (!MyNested++) { + if ((result = (_nc_tracing & (mask))) != 0 + && _nc_try_global(tracef) == 0) { + /* we will call _nc_locked_tracef(), no nesting so far */ + } else { + /* we will not call _nc_locked_tracef() */ + MyNested = 0; + } + } else { + /* we may call _nc_locked_tracef(), but with nested_tracef > 0 */ + result = (_nc_tracing & (mask)); + } + _nc_unlock_global(tst_tracef); + return result; +} + +/* + * We call this if _nc_use_tracef() returns true, which means we must unlock + * the tracef mutex. + */ +NCURSES_EXPORT(void) +_nc_locked_tracef(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + _nc_va_tracef(fmt, ap); + va_end(ap); + + if (--(MyNested) == 0) { + _nc_unlock_global(tracef); + } +} +#endif /* USE_REENTRANT */ + #endif /* TRACE */