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- Newsgroups: comp.sources.misc
- From: allbery@uunet.UU.NET (Brandon S. Allbery - comp.sources.misc)
- Subject: v07i057: DBUG Package (Part 1 of 3)
- Reply-To: fnf@estinc.UUCP
-
- Posting-number: Volume 7, Issue 57
- Submitted-by: fnf@estinc.UUCP
- Archive-name: dbug/part01
-
- This is the latest version of my dbug package, a relatively portable and
- machine independent macro based C debugging package. The dbug package
- has proven to be a very flexible and useful tool for debugging, testing,
- and porting C programs.
-
- All of the features of the dbug package can be enabled or disabled
- dynamically at execution time. This means that production programs will
- run normally when debugging is not enabled, and eliminates the need to
- maintain two separate versions of a program during testing.
-
- Many of the things easily accomplished with conventional debugging tools,
- such as symbolic debuggers, are difficult or impossible with this package,
- and vice versa. Thus the dbug package should not be thought of as a
- replacement or substitute for other debugging tools, but simply as a useful
- addition to the program development and maintenance environment.
-
- One of the new features with this version is stack usage accounting. You
- can discover the total amount of stack used by your program, and the amount
- used by each individual function. You will need to know in which direction
- you stack grows (up or down).
-
- -Fred Fish 12-Jun-89
-
- #--------CUT---------CUT---------CUT---------CUT--------#
- #########################################################
- # #
- # This is a shell archive file. To extract files: #
- # #
- # 1) Make a directory for the files. #
- # 2) Write a file, such as "file.shar", containing #
- # this archive file into the directory. #
- # 3) Type "sh file.shar". Do not use csh. #
- # #
- #########################################################
- #
- #
- echo Extracting dbug.h:
- sed 's/^Z//' >dbug.h <<\STUNKYFLUFF
- Z/******************************************************************************
- Z * *
- Z * N O T I C E *
- Z * *
- Z * Copyright Abandoned, 1987, Fred Fish *
- Z * *
- Z * *
- Z * This previously copyrighted work has been placed into the public *
- Z * domain by the author and may be freely used for any purpose, *
- Z * private or commercial. *
- Z * *
- Z * Because of the number of inquiries I was receiving about the use *
- Z * of this product in commercially developed works I have decided to *
- Z * simply make it public domain to further its unrestricted use. I *
- Z * specifically would be most happy to see this material become a *
- Z * part of the standard Unix distributions by AT&T and the Berkeley *
- Z * Computer Science Research Group, and a standard part of the GNU *
- Z * system from the Free Software Foundation. *
- Z * *
- Z * I would appreciate it, as a courtesy, if this notice is left in *
- Z * all copies and derivative works. Thank you. *
- Z * *
- Z * The author makes no warranty of any kind with respect to this *
- Z * product and explicitly disclaims any implied warranties of mer- *
- Z * chantability or fitness for any particular purpose. *
- Z * *
- Z ******************************************************************************
- Z */
- Z
- Z
- Z/*
- Z * FILE
- Z *
- Z * dbug.h user include file for programs using the dbug package
- Z *
- Z * SYNOPSIS
- Z *
- Z * #include <local/dbug.h>
- Z *
- Z * SCCS ID
- Z *
- Z * @(#)dbug.h 1.12 4/2/89
- Z *
- Z * DESCRIPTION
- Z *
- Z * Programs which use the dbug package must include this file.
- Z * It contains the appropriate macros to call support routines
- Z * in the dbug runtime library.
- Z *
- Z * To disable compilation of the macro expansions define the
- Z * preprocessor symbol "DBUG_OFF". This will result in null
- Z * macros expansions so that the resulting code will be smaller
- Z * and faster. (The difference may be smaller than you think
- Z * so this step is recommended only when absolutely necessary).
- Z * In general, tradeoffs between space and efficiency are
- Z * decided in favor of efficiency since space is seldom a
- Z * problem on the new machines).
- Z *
- Z * All externally visible symbol names follow the pattern
- Z * "_db_xxx..xx_" to minimize the possibility of a dbug package
- Z * symbol colliding with a user defined symbol.
- Z *
- Z * The DBUG_<N> style macros are obsolete and should not be used
- Z * in new code. Macros to map them to instances of DBUG_PRINT
- Z * are provided for compatibility with older code. They may go
- Z * away completely in subsequent releases.
- Z *
- Z * AUTHOR
- Z *
- Z * Fred Fish
- Z * (Currently employed by Motorola Computer Division, Tempe, Az.)
- Z * hao!noao!mcdsun!fnf
- Z * (602) 438-3614
- Z *
- Z */
- Z
- Z
- Z/*
- Z * Internally used dbug variables which must be global.
- Z */
- Z
- Z#ifndef DBUG_OFF
- Z extern int _db_on_; /* TRUE if debug currently enabled */
- Z extern FILE *_db_fp_; /* Current debug output stream */
- Z extern char *_db_process_; /* Name of current process */
- Z extern int _db_keyword_ (); /* Accept/reject keyword */
- Z extern void _db_push_ (); /* Push state, set up new state */
- Z extern void _db_pop_ (); /* Pop previous debug state */
- Z extern void _db_enter_ (); /* New user function entered */
- Z extern void _db_return_ (); /* User function return */
- Z extern void _db_pargs_ (); /* Remember args for line */
- Z extern void _db_doprnt_ (); /* Print debug output */
- Z extern void _db_setjmp_ (); /* Save debugger environment */
- Z extern void _db_longjmp_ (); /* Restore debugger environment */
- Z# endif
- Z
- Z
- Z/*
- Z * These macros provide a user interface into functions in the
- Z * dbug runtime support library. They isolate users from changes
- Z * in the MACROS and/or runtime support.
- Z *
- Z * The symbols "__LINE__" and "__FILE__" are expanded by the
- Z * preprocessor to the current source file line number and file
- Z * name respectively.
- Z *
- Z * WARNING --- Because the DBUG_ENTER macro allocates space on
- Z * the user function's stack, it must precede any executable
- Z * statements in the user function.
- Z *
- Z */
- Z
- Z# ifdef DBUG_OFF
- Z# define DBUG_ENTER(a1)
- Z# define DBUG_RETURN(a1) return(a1)
- Z# define DBUG_VOID_RETURN return
- Z# define DBUG_EXECUTE(keyword,a1)
- Z# define DBUG_PRINT(keyword,arglist)
- Z# define DBUG_2(keyword,format) /* Obsolete */
- Z# define DBUG_3(keyword,format,a1) /* Obsolete */
- Z# define DBUG_4(keyword,format,a1,a2) /* Obsolete */
- Z# define DBUG_5(keyword,format,a1,a2,a3) /* Obsolete */
- Z# define DBUG_PUSH(a1)
- Z# define DBUG_POP()
- Z# define DBUG_PROCESS(a1)
- Z# define DBUG_FILE (stderr)
- Z# define DBUG_SETJMP setjmp
- Z# define DBUG_LONGJMP longjmp
- Z# else
- Z# define DBUG_ENTER(a) \
- Z auto char *_db_func_; auto char *_db_file_; auto int _db_level_; \
- Z auto char *_db_framep_; \
- Z _db_enter_ (a,__FILE__,__LINE__,&_db_func_,&_db_file_,&_db_level_, \
- Z &_db_framep_)
- Z# define DBUG_LEAVE \
- Z (_db_return_ (__LINE__, &_db_func_, &_db_file_, &_db_level_))
- Z# define DBUG_RETURN(a1) return (DBUG_LEAVE, (a1))
- Z/* define DBUG_RETURN(a1) {DBUG_LEAVE; return(a1);} Alternate form */
- Z# define DBUG_VOID_RETURN {DBUG_LEAVE; return;}
- Z# define DBUG_EXECUTE(keyword,a1) \
- Z {if (_db_on_) {if (_db_keyword_ (keyword)) { a1 }}}
- Z# define DBUG_PRINT(keyword,arglist) \
- Z {if (_db_on_) {_db_pargs_(__LINE__,keyword); _db_doprnt_ arglist;}}
- Z# define DBUG_2(keyword,format) \
- Z DBUG_PRINT(keyword,(format)) /* Obsolete */
- Z# define DBUG_3(keyword,format,a1) \
- Z DBUG_PRINT(keyword,(format,a1)) /* Obsolete */
- Z# define DBUG_4(keyword,format,a1,a2) \
- Z DBUG_PRINT(keyword,(format,a1,a2)) /* Obsolete */
- Z# define DBUG_5(keyword,format,a1,a2,a3) \
- Z DBUG_PRINT(keyword,(format,a1,a2,a3)) /* Obsolete */
- Z# define DBUG_PUSH(a1) _db_push_ (a1)
- Z# define DBUG_POP() _db_pop_ ()
- Z# define DBUG_PROCESS(a1) (_db_process_ = a1)
- Z# define DBUG_FILE (_db_fp_)
- Z# define DBUG_SETJMP(a1) (_db_setjmp_ (), setjmp (a1))
- Z# define DBUG_LONGJMP(a1,a2) (_db_longjmp_ (), longjmp (a1, a2))
- Z# endif
- STUNKYFLUFF
- set `sum dbug.h`
- if test 16096 != $1
- then
- echo dbug.h: Checksum error. Is: $1, should be: 16096.
- fi
- #
- #
- echo Extracting dbug.c:
- sed 's/^Z//' >dbug.c <<\STUNKYFLUFF
- Z/******************************************************************************
- Z * *
- Z * N O T I C E *
- Z * *
- Z * Copyright Abandoned, 1987, Fred Fish *
- Z * *
- Z * *
- Z * This previously copyrighted work has been placed into the public *
- Z * domain by the author and may be freely used for any purpose, *
- Z * private or commercial. *
- Z * *
- Z * Because of the number of inquiries I was receiving about the use *
- Z * of this product in commercially developed works I have decided to *
- Z * simply make it public domain to further its unrestricted use. I *
- Z * specifically would be most happy to see this material become a *
- Z * part of the standard Unix distributions by AT&T and the Berkeley *
- Z * Computer Science Research Group, and a standard part of the GNU *
- Z * system from the Free Software Foundation. *
- Z * *
- Z * I would appreciate it, as a courtesy, if this notice is left in *
- Z * all copies and derivative works. Thank you. *
- Z * *
- Z * The author makes no warranty of any kind with respect to this *
- Z * product and explicitly disclaims any implied warranties of mer- *
- Z * chantability or fitness for any particular purpose. *
- Z * *
- Z ******************************************************************************
- Z */
- Z
- Z
- Z/*
- Z * FILE
- Z *
- Z * dbug.c runtime support routines for dbug package
- Z *
- Z * SCCS
- Z *
- Z * @(#)dbug.c 1.19 9/5/87
- Z *
- Z * DESCRIPTION
- Z *
- Z * These are the runtime support routines for the dbug package.
- Z * The dbug package has two main components; the user include
- Z * file containing various macro definitions, and the runtime
- Z * support routines which are called from the macro expansions.
- Z *
- Z * Externally visible functions in the runtime support module
- Z * use the naming convention pattern "_db_xx...xx_", thus
- Z * they are unlikely to collide with user defined function names.
- Z *
- Z * AUTHOR(S)
- Z *
- Z * Fred Fish (base code)
- Z * Enhanced Software Technologies, Tempe, AZ
- Z * asuvax!mcdphx!estinc!fnf
- Z *
- Z * Binayak Banerjee (profiling enhancements)
- Z * seismo!bpa!sjuvax!bbanerje
- Z */
- Z
- Z
- Z#include <stdio.h>
- Z
- Z#if NO_VARARGS
- Z#include "vargs.h" /* Use our "fake" varargs */
- Z#else
- Z#include <varargs.h> /* Use system supplied varargs package */
- Z#endif
- Z
- Z#if amiga
- Z#define HZ (50) /* Probably in some header somewhere */
- Z#endif
- Z
- Z#ifdef M_XENIX /* Some xenix compilers predefine this */
- Z#ifndef xenix
- Z#define xenix 1
- Z#endif
- Z#endif
- Z
- Z/*
- Z * Manifest constants that should not require any changes.
- Z */
- Z
- Z#define FALSE 0 /* Boolean FALSE */
- Z#define TRUE 1 /* Boolean TRUE */
- Z#define EOS '\000' /* End Of String marker */
- Z
- Z/*
- Z * Manifest constants which may be "tuned" if desired.
- Z */
- Z
- Z#define PRINTBUF 1024 /* Print buffer size */
- Z#define INDENT 4 /* Indentation per trace level */
- Z#define MAXDEPTH 200 /* Maximum trace depth default */
- Z
- Z/*
- Z * The following flags are used to determine which
- Z * capabilities the user has enabled with the state
- Z * push macro.
- Z */
- Z
- Z#define TRACE_ON 000001 /* Trace enabled */
- Z#define DEBUG_ON 000002 /* Debug enabled */
- Z#define FILE_ON 000004 /* File name print enabled */
- Z#define LINE_ON 000010 /* Line number print enabled */
- Z#define DEPTH_ON 000020 /* Function nest level print enabled */
- Z#define PROCESS_ON 000040 /* Process name print enabled */
- Z#define NUMBER_ON 000100 /* Number each line of output */
- Z#define PROFILE_ON 000200 /* Print out profiling code */
- Z#define PID_ON 000400 /* Identify each line with process id */
- Z
- Z#define TRACING (stack -> flags & TRACE_ON)
- Z#define DEBUGGING (stack -> flags & DEBUG_ON)
- Z#define PROFILING (stack -> flags & PROFILE_ON)
- Z#define STREQ(a,b) (strcmp(a,b) == 0)
- Z
- Z/*
- Z * Typedefs to make things more obvious.
- Z */
- Z
- Z#define VOID void /* Can't use typedef for most compilers */
- Ztypedef int BOOLEAN;
- Z
- Z/*
- Z * Make it easy to change storage classes if necessary.
- Z */
- Z
- Z#define LOCAL static /* Names not needed by outside world */
- Z#define IMPORT extern /* Names defined externally */
- Z#define EXPORT /* Allocated here, available globally */
- Z#define AUTO auto /* Names to be allocated on stack */
- Z#define REGISTER register /* Names to be placed in registers */
- Z
- Z/*
- Z * The default file for profiling. Could also add another flag
- Z * (G?) which allowed the user to specify this.
- Z *
- Z * If the automatic variables get allocated on the stack in
- Z * reverse order from their declarations, then define AUTOS_REVERSE.
- Z * This is used by the code that keeps track of stack usage. For
- Z * forward allocation, the difference in the dbug frame pointers
- Z * represents stack used by the callee function. For reverse allocation,
- Z * the difference represents stack used by the caller function.
- Z *
- Z */
- Z
- Z#define PROF_FILE "dbugmon.out"
- Z#define PROF_EFMT "E\t%ld\t%s\n"
- Z#define PROF_SFMT "S\t%lx\t%lx\t%s\n"
- Z#define PROF_XFMT "X\t%ld\t%s\n"
- Z
- Z#if M_I386 /* predefined by xenix 386 compiler */
- Z#define AUTOS_REVERSE 1
- Z#endif
- Z
- Z/*
- Z * Variables which are available externally but should only
- Z * be accessed via the macro package facilities.
- Z */
- Z
- ZEXPORT FILE *_db_fp_ = stderr; /* Output stream, default stderr */
- ZEXPORT FILE *_db_pfp_ = (FILE *)0; /* Profile stream, 'dbugmon.out' */
- ZEXPORT char *_db_process_ = "dbug"; /* Pointer to process name; argv[0] */
- ZEXPORT BOOLEAN _db_on_ = FALSE; /* TRUE if debugging currently on */
- ZEXPORT BOOLEAN _db_pon_ = FALSE; /* TRUE if debugging currently on */
- Z
- Z/*
- Z * Externally supplied functions.
- Z */
- Z
- Z#if (unix || xenix) /* Only needed for unix */
- ZIMPORT VOID perror (); /* Print system/library error */
- ZIMPORT int chown (); /* Change owner of a file */
- ZIMPORT int getgid (); /* Get real group id */
- ZIMPORT int getuid (); /* Get real user id */
- ZIMPORT int access (); /* Test file for access */
- Z#else
- Z#if !(amiga && LATTICE)
- ZLOCAL VOID perror (); /* Fake system/library error print routine */
- Z#endif
- Z#endif
- Z
- Z# if BSD4_3 || sun
- ZIMPORT int getrusage ();
- Z#endif
- Z
- ZIMPORT int atoi (); /* Convert ascii to integer */
- ZIMPORT VOID exit (); /* Terminate execution */
- ZIMPORT int fclose (); /* Close a stream */
- ZIMPORT FILE *fopen (); /* Open a stream */
- ZIMPORT int fprintf (); /* Formatted print on file */
- ZIMPORT int vfprintf (); /* Varargs form of fprintf */
- ZIMPORT VOID free ();
- ZIMPORT char *malloc (); /* Allocate memory */
- ZIMPORT int strcmp (); /* Compare strings */
- ZIMPORT char *strcpy (); /* Copy strings around */
- ZIMPORT int strlen (); /* Find length of string */
- Z
- Z#ifndef fflush /* This is sometimes a macro */
- ZIMPORT int fflush (); /* Flush output for stream */
- Z#endif
- Z
- Z
- Z/*
- Z * The user may specify a list of functions to trace or
- Z * debug. These lists are kept in a linear linked list,
- Z * a very simple implementation.
- Z */
- Z
- Zstruct link {
- Z char *string; /* Pointer to link's contents */
- Z struct link *next_link; /* Pointer to the next link */
- Z};
- Z
- Z
- Z/*
- Z * Debugging states can be pushed or popped off of a
- Z * stack which is implemented as a linked list. Note
- Z * that the head of the list is the current state and the
- Z * stack is pushed by adding a new state to the head of the
- Z * list or popped by removing the first link.
- Z */
- Z
- Zstruct state {
- Z int flags; /* Current state flags */
- Z int maxdepth; /* Current maximum trace depth */
- Z unsigned int delay; /* Delay after each output line */
- Z int level; /* Current function nesting level */
- Z FILE *out_file; /* Current output stream */
- Z FILE *prof_file; /* Current profiling stream */
- Z struct link *functions; /* List of functions */
- Z struct link *p_functions; /* List of profiled functions */
- Z struct link *keywords; /* List of debug keywords */
- Z struct link *processes; /* List of process names */
- Z struct state *next_state; /* Next state in the list */
- Z};
- Z
- ZLOCAL struct state *stack = NULL; /* Linked list of stacked states */
- Z
- Z/*
- Z * Local variables not seen by user.
- Z */
- Z
- ZLOCAL int lineno = 0; /* Current debugger output line number */
- ZLOCAL char *func = "?func"; /* Name of current user function */
- ZLOCAL char *file = "?file"; /* Name of current user file */
- ZLOCAL BOOLEAN init_done = FALSE;/* Set to TRUE when initialization done */
- ZLOCAL char **framep = NULL; /* Pointer to current frame */
- Z
- Z#if (unix || xenix || amiga)
- ZLOCAL int jmplevel; /* Remember nesting level at setjmp () */
- ZLOCAL char *jmpfunc; /* Remember current function for setjmp */
- ZLOCAL char *jmpfile; /* Remember current file for setjmp */
- Z#endif
- Z
- ZLOCAL struct link *ListParse ();/* Parse a debug command string */
- ZLOCAL char *StrDup (); /* Make a fresh copy of a string */
- ZLOCAL VOID OpenFile (); /* Open debug output stream */
- ZLOCAL VOID OpenProfile (); /* Open profile output stream */
- ZLOCAL VOID CloseFile (); /* Close debug output stream */
- ZLOCAL VOID PushState (); /* Push current debug state */
- ZLOCAL VOID ChangeOwner (); /* Change file owner and group */
- ZLOCAL BOOLEAN DoTrace (); /* Test for tracing enabled */
- ZLOCAL BOOLEAN Writable (); /* Test to see if file is writable */
- ZLOCAL unsigned long Clock (); /* Return current user time (ms) */
- ZLOCAL long *DbugMalloc (); /* Allocate memory for runtime support */
- ZLOCAL char *BaseName (); /* Remove leading pathname components */
- ZLOCAL VOID DoPrefix (); /* Print debugger line prefix */
- ZLOCAL VOID FreeList (); /* Free memory from linked list */
- ZLOCAL VOID Indent (); /* Indent line to specified indent */
- Z
- Z /* Supplied in Sys V runtime environ */
- ZLOCAL char *strtok (); /* Break string into tokens */
- ZLOCAL char *strrchr (); /* Find last occurance of char */
- Z
- Z/*
- Z * The following local variables are used to hold the state information
- Z * between the call to _db_pargs_() and _db_doprnt_(), during
- Z * expansion of the DBUG_PRINT macro. This is the only macro
- Z * that currently uses these variables.
- Z *
- Z * These variables are currently used only by _db_pargs_() and
- Z * _db_doprnt_().
- Z */
- Z
- ZLOCAL int u_line = 0; /* User source code line number */
- ZLOCAL char *u_keyword = "?"; /* Keyword for current macro */
- Z
- Z/*
- Z * Miscellaneous printf format strings.
- Z */
- Z
- Z#define ERR_MISSING_RETURN "%s: missing DBUG_RETURN or DBUG_VOID_RETURN macro in function \"%s\"\n"
- Z#define ERR_OPEN "%s: can't open debug output stream \"%s\": "
- Z#define ERR_CLOSE "%s: can't close debug file: "
- Z#define ERR_ABORT "%s: debugger aborting because %s\n"
- Z#define ERR_CHOWN "%s: can't change owner/group of \"%s\": "
- Z
- Z/*
- Z * Macros and defines for testing file accessibility under UNIX.
- Z */
- Z
- Z#if (unix || xenix)
- Z# define A_EXISTS 00 /* Test for file existance */
- Z# define A_EXECUTE 01 /* Test for execute permission */
- Z# define A_WRITE 02 /* Test for write access */
- Z# define A_READ 03 /* Test for read access */
- Z# define EXISTS(pathname) (access (pathname, A_EXISTS) == 0)
- Z# define WRITABLE(pathname) (access (pathname, A_WRITE) == 0)
- Z#else
- Z# define EXISTS(pathname) (FALSE) /* Assume no existance */
- Z#endif
- Z
- Z/*
- Z * Translate some calls among different systems.
- Z */
- Z
- Z#if (unix || xenix)
- Z# define Delay sleep
- ZIMPORT unsigned int sleep (); /* Pause for given number of seconds */
- Z#endif
- Z
- Z#if amiga
- ZIMPORT int Delay (); /* Pause for given number of ticks */
- Z#endif
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_push_ push current debugger state and set up new one
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_push_ (control)
- Z * char *control;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given pointer to a debug control string in "control", pushes
- Z * the current debug state, parses the control string, and sets
- Z * up a new debug state.
- Z *
- Z * The only attribute of the new state inherited from the previous
- Z * state is the current function nesting level. This can be
- Z * overridden by using the "r" flag in the control string.
- Z *
- Z * The debug control string is a sequence of colon separated fields
- Z * as follows:
- Z *
- Z * <field_1>:<field_2>:...:<field_N>
- Z *
- Z * Each field consists of a mandatory flag character followed by
- Z * an optional "," and comma separated list of modifiers:
- Z *
- Z * flag[,modifier,modifier,...,modifier]
- Z *
- Z * The currently recognized flag characters are:
- Z *
- Z * d Enable output from DBUG_<N> macros for
- Z * for the current state. May be followed
- Z * by a list of keywords which selects output
- Z * only for the DBUG macros with that keyword.
- Z * A null list of keywords implies output for
- Z * all macros.
- Z *
- Z * D Delay after each debugger output line.
- Z * The argument is the number of tenths of seconds
- Z * to delay, subject to machine capabilities.
- Z * I.E. -#D,20 is delay two seconds.
- Z *
- Z * f Limit debugging and/or tracing, and profiling to the
- Z * list of named functions. Note that a null list will
- Z * disable all functions. The appropriate "d" or "t"
- Z * flags must still be given, this flag only limits their
- Z * actions if they are enabled.
- Z *
- Z * F Identify the source file name for each
- Z * line of debug or trace output.
- Z *
- Z * i Identify the process with the pid for each line of
- Z * debug or trace output.
- Z *
- Z * g Enable profiling. Create a file called 'dbugmon.out'
- Z * containing information that can be used to profile
- Z * the program. May be followed by a list of keywords
- Z * that select profiling only for the functions in that
- Z * list. A null list implies that all functions are
- Z * considered.
- Z *
- Z * L Identify the source file line number for
- Z * each line of debug or trace output.
- Z *
- Z * n Print the current function nesting depth for
- Z * each line of debug or trace output.
- Z *
- Z * N Number each line of dbug output.
- Z *
- Z * o Redirect the debugger output stream to the
- Z * specified file. The default output is stderr.
- Z *
- Z * p Limit debugger actions to specified processes.
- Z * A process must be identified with the
- Z * DBUG_PROCESS macro and match one in the list
- Z * for debugger actions to occur.
- Z *
- Z * P Print the current process name for each
- Z * line of debug or trace output.
- Z *
- Z * r When pushing a new state, do not inherit
- Z * the previous state's function nesting level.
- Z * Useful when the output is to start at the
- Z * left margin.
- Z *
- Z * t Enable function call/exit trace lines.
- Z * May be followed by a list (containing only
- Z * one modifier) giving a numeric maximum
- Z * trace level, beyond which no output will
- Z * occur for either debugging or tracing
- Z * macros. The default is a compile time
- Z * option.
- Z *
- Z * Some examples of debug control strings which might appear
- Z * on a shell command line (the "-#" is typically used to
- Z * introduce a control string to an application program) are:
- Z *
- Z * -#d:t
- Z * -#d:f,main,subr1:F:L:t,20
- Z * -#d,input,output,files:n
- Z *
- Z * For convenience, any leading "-#" is stripped off.
- Z *
- Z */
- Z
- Z
- ZVOID _db_push_ (control)
- Zchar *control;
- Z{
- Z REGISTER char *scan;
- Z REGISTER struct link *temp;
- Z
- Z if (control && *control == '-') {
- Z if (*++control == '#') {
- Z control++;
- Z }
- Z }
- Z control = StrDup (control);
- Z PushState ();
- Z scan = strtok (control, ":");
- Z for (; scan != NULL; scan = strtok ((char *)NULL, ":")) {
- Z switch (*scan++) {
- Z case 'd':
- Z _db_on_ = TRUE;
- Z stack -> flags |= DEBUG_ON;
- Z if (*scan++ == ',') {
- Z stack -> keywords = ListParse (scan);
- Z }
- Z break;
- Z case 'D':
- Z stack -> delay = 0;
- Z if (*scan++ == ',') {
- Z temp = ListParse (scan);
- Z stack -> delay = DelayArg (atoi (temp -> string));
- Z FreeList (temp);
- Z }
- Z break;
- Z case 'f':
- Z if (*scan++ == ',') {
- Z stack -> functions = ListParse (scan);
- Z }
- Z break;
- Z case 'F':
- Z stack -> flags |= FILE_ON;
- Z break;
- Z case 'i':
- Z stack -> flags |= PID_ON;
- Z break;
- Z case 'g':
- Z _db_pon_ = TRUE;
- Z OpenProfile(PROF_FILE);
- Z stack -> flags |= PROFILE_ON;
- Z if (*scan++ == ',') {
- Z stack -> p_functions = ListParse (scan);
- Z }
- Z break;
- Z case 'L':
- Z stack -> flags |= LINE_ON;
- Z break;
- Z case 'n':
- Z stack -> flags |= DEPTH_ON;
- Z break;
- Z case 'N':
- Z stack -> flags |= NUMBER_ON;
- Z break;
- Z case 'o':
- Z if (*scan++ == ',') {
- Z temp = ListParse (scan);
- Z OpenFile (temp -> string);
- Z FreeList (temp);
- Z } else {
- Z OpenFile ("-");
- Z }
- Z break;
- Z case 'p':
- Z if (*scan++ == ',') {
- Z stack -> processes = ListParse (scan);
- Z }
- Z break;
- Z case 'P':
- Z stack -> flags |= PROCESS_ON;
- Z break;
- Z case 'r':
- Z stack -> level = 0;
- Z break;
- Z case 't':
- Z stack -> flags |= TRACE_ON;
- Z if (*scan++ == ',') {
- Z temp = ListParse (scan);
- Z stack -> maxdepth = atoi (temp -> string);
- Z FreeList (temp);
- Z }
- Z break;
- Z }
- Z }
- Z free (control);
- Z}
- Z
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_pop_ pop the debug stack
- Z *
- Z * DESCRIPTION
- Z *
- Z * Pops the debug stack, returning the debug state to its
- Z * condition prior to the most recent _db_push_ invocation.
- Z * Note that the pop will fail if it would remove the last
- Z * valid state from the stack. This prevents user errors
- Z * in the push/pop sequence from screwing up the debugger.
- Z * Maybe there should be some kind of warning printed if the
- Z * user tries to pop too many states.
- Z *
- Z */
- Z
- ZVOID _db_pop_ ()
- Z{
- Z REGISTER struct state *discard;
- Z
- Z discard = stack;
- Z if (discard != NULL && discard -> next_state != NULL) {
- Z stack = discard -> next_state;
- Z _db_fp_ = stack -> out_file;
- Z _db_pfp_ = stack -> prof_file;
- Z if (discard -> keywords != NULL) {
- Z FreeList (discard -> keywords);
- Z }
- Z if (discard -> functions != NULL) {
- Z FreeList (discard -> functions);
- Z }
- Z if (discard -> processes != NULL) {
- Z FreeList (discard -> processes);
- Z }
- Z if (discard -> p_functions != NULL) {
- Z FreeList (discard -> p_functions);
- Z }
- Z CloseFile (discard -> out_file);
- Z CloseFile (discard -> prof_file);
- Z free ((char *) discard);
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_enter_ process entry point to user function
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_enter_ (_func_, _file_, _line_,
- Z * _sfunc_, _sfile_, _slevel_, _sframep_)
- Z * char *_func_; points to current function name
- Z * char *_file_; points to current file name
- Z * int _line_; called from source line number
- Z * char **_sfunc_; save previous _func_
- Z * char **_sfile_; save previous _file_
- Z * int *_slevel_; save previous nesting level
- Z * char ***_sframep_; save previous frame pointer
- Z *
- Z * DESCRIPTION
- Z *
- Z * Called at the beginning of each user function to tell
- Z * the debugger that a new function has been entered.
- Z * Note that the pointers to the previous user function
- Z * name and previous user file name are stored on the
- Z * caller's stack (this is why the ENTER macro must be
- Z * the first "executable" code in a function, since it
- Z * allocates these storage locations). The previous nesting
- Z * level is also stored on the callers stack for internal
- Z * self consistency checks.
- Z *
- Z * Also prints a trace line if tracing is enabled and
- Z * increments the current function nesting depth.
- Z *
- Z * Note that this mechanism allows the debugger to know
- Z * what the current user function is at all times, without
- Z * maintaining an internal stack for the function names.
- Z *
- Z */
- Z
- ZVOID _db_enter_ (_func_, _file_, _line_, _sfunc_, _sfile_, _slevel_,
- Z _sframep_)
- Zchar *_func_;
- Zchar *_file_;
- Zint _line_;
- Zchar **_sfunc_;
- Zchar **_sfile_;
- Zint *_slevel_;
- Zchar ***_sframep_;
- Z{
- Z long stackused;
- Z
- Z if (!init_done) {
- Z _db_push_ ("");
- Z }
- Z *_sfunc_ = func;
- Z func = _func_;
- Z *_sfile_ = file;
- Z file = BaseName (_file_);
- Z stack -> level++;
- Z *_slevel_ = stack -> level;
- Z *_sframep_ = framep;
- Z framep = (char **) _sframep_;
- Z if (DoProfile ()) {
- Z if (*framep == NULL) {
- Z stackused = 0;
- Z } else {
- Z stackused = ((long)(*framep)) - ((long)(framep));
- Z stackused = stackused > 0 ? stackused : -stackused;
- Z }
- Z (VOID) fprintf (_db_pfp_, PROF_EFMT , Clock (), func);
- Z#if AUTOS_REVERSE
- Z (VOID) fprintf (_db_pfp_, PROF_SFMT, framep, stackused, *_sfunc_);
- Z#else
- Z (VOID) fprintf (_db_pfp_, PROF_SFMT, framep, stackused, func);
- Z#endif
- Z (VOID) fflush (_db_pfp_);
- Z }
- Z if (DoTrace ()) {
- Z DoPrefix (_line_);
- Z Indent (stack -> level);
- Z (VOID) fprintf (_db_fp_, ">%s\n", func);
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_return_ process exit from user function
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_return_ (_line_, _sfunc_, _sfile_, _slevel_)
- Z * int _line_; current source line number
- Z * char **_sfunc_; where previous _func_ is to be retrieved
- Z * char **_sfile_; where previous _file_ is to be retrieved
- Z * int *_slevel_; where previous level was stashed
- Z *
- Z * DESCRIPTION
- Z *
- Z * Called just before user function executes an explicit or implicit
- Z * return. Prints a trace line if trace is enabled, decrements
- Z * the current nesting level, and restores the current function and
- Z * file names from the defunct function's stack.
- Z *
- Z */
- Z
- ZVOID _db_return_ (_line_, _sfunc_, _sfile_, _slevel_)
- Zint _line_;
- Zchar **_sfunc_;
- Zchar **_sfile_;
- Zint *_slevel_;
- Z{
- Z if (!init_done) {
- Z _db_push_ ("");
- Z }
- Z if (stack -> level != *_slevel_ && (TRACING || DEBUGGING || PROFILING)) {
- Z (VOID) fprintf (_db_fp_, ERR_MISSING_RETURN, _db_process_, func);
- Z } else if (DoProfile ()) {
- Z (VOID) fprintf (_db_pfp_, PROF_XFMT, Clock(), func);
- Z } else if (DoTrace ()) {
- Z DoPrefix (_line_);
- Z Indent (stack -> level);
- Z (VOID) fprintf (_db_fp_, "<%s\n", func);
- Z }
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z stack -> level = *_slevel_ - 1;
- Z func = *_sfunc_;
- Z file = *_sfile_;
- Z if (framep != NULL) {
- Z framep = (char **) *framep;
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_pargs_ log arguments for subsequent use by _db_doprnt_()
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_pargs_ (_line_, keyword)
- Z * int _line_;
- Z * char *keyword;
- Z *
- Z * DESCRIPTION
- Z *
- Z * The new universal printing macro DBUG_PRINT, which replaces
- Z * all forms of the DBUG_N macros, needs two calls to runtime
- Z * support routines. The first, this function, remembers arguments
- Z * that are used by the subsequent call to _db_doprnt_().
- Z*
- Z */
- Z
- ZVOID _db_pargs_ (_line_, keyword)
- Zint _line_;
- Zchar *keyword;
- Z{
- Z u_line = _line_;
- Z u_keyword = keyword;
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_doprnt_ handle print of debug lines
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_doprnt_ (format, va_alist)
- Z * char *format;
- Z * va_dcl;
- Z *
- Z * DESCRIPTION
- Z *
- Z * When invoked via one of the DBUG macros, tests the current keyword
- Z * set by calling _db_pargs_() to see if that macro has been selected
- Z * for processing via the debugger control string, and if so, handles
- Z * printing of the arguments via the format string. The line number
- Z * of the DBUG macro in the source is found in u_line.
- Z *
- Z * Note that the format string SHOULD NOT include a terminating
- Z * newline, this is supplied automatically.
- Z *
- Z */
- Z
- Z/*VARARGS1*/
- ZVOID _db_doprnt_ (format, va_alist)
- Zchar *format;
- Zva_dcl
- Z{
- Z va_list args;
- Z
- Z va_start (args);
- Z if (_db_keyword_ (u_keyword)) {
- Z DoPrefix (u_line);
- Z if (TRACING) {
- Z Indent (stack -> level + 1);
- Z } else {
- Z (VOID) fprintf (_db_fp_, "%s: ", func);
- Z }
- Z (VOID) fprintf (_db_fp_, "%s: ", u_keyword);
- Z (VOID) vfprintf (_db_fp_, format, args);
- Z (VOID) fprintf (_db_fp_, "\n");
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z }
- Z va_end (args);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * ListParse parse list of modifiers in debug control string
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL struct link *ListParse (ctlp)
- Z * char *ctlp;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given pointer to a comma separated list of strings in "cltp",
- Z * parses the list, building a list and returning a pointer to it.
- Z * The original comma separated list is destroyed in the process of
- Z * building the linked list, thus it had better be a duplicate
- Z * if it is important.
- Z *
- Z * Note that since each link is added at the head of the list,
- Z * the final list will be in "reverse order", which is not
- Z * significant for our usage here.
- Z *
- Z */
- Z
- ZLOCAL struct link *ListParse (ctlp)
- Zchar *ctlp;
- Z{
- Z REGISTER char *start;
- Z REGISTER struct link *new;
- Z REGISTER struct link *head;
- Z
- Z head = NULL;
- Z while (*ctlp != EOS) {
- Z start = ctlp;
- Z while (*ctlp != EOS && *ctlp != ',') {
- Z ctlp++;
- Z }
- Z if (*ctlp == ',') {
- Z *ctlp++ = EOS;
- Z }
- Z new = (struct link *) DbugMalloc (sizeof (struct link));
- Z new -> string = StrDup (start);
- Z new -> next_link = head;
- Z head = new;
- Z }
- Z return (head);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * InList test a given string for member of a given list
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL BOOLEAN InList (linkp, cp)
- Z * struct link *linkp;
- Z * char *cp;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Tests the string pointed to by "cp" to determine if it is in
- Z * the list pointed to by "linkp". Linkp points to the first
- Z * link in the list. If linkp is NULL then the string is treated
- Z * as if it is in the list (I.E all strings are in the null list).
- Z * This may seem rather strange at first but leads to the desired
- Z * operation if no list is given. The net effect is that all
- Z * strings will be accepted when there is no list, and when there
- Z * is a list, only those strings in the list will be accepted.
- Z *
- Z */
- Z
- ZLOCAL BOOLEAN InList (linkp, cp)
- Zstruct link *linkp;
- Zchar *cp;
- Z{
- Z REGISTER struct link *scan;
- Z REGISTER BOOLEAN accept;
- Z
- Z if (linkp == NULL) {
- Z accept = TRUE;
- Z } else {
- Z accept = FALSE;
- Z for (scan = linkp; scan != NULL; scan = scan -> next_link) {
- Z if (STREQ (scan -> string, cp)) {
- Z accept = TRUE;
- Z break;
- Z }
- Z }
- Z }
- Z return (accept);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * PushState push current state onto stack and set up new one
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID PushState ()
- Z *
- Z * DESCRIPTION
- Z *
- Z * Pushes the current state on the state stack, and initializes
- Z * a new state. The only parameter inherited from the previous
- Z * state is the function nesting level. This action can be
- Z * inhibited if desired, via the "r" flag.
- Z *
- Z * The state stack is a linked list of states, with the new
- Z * state added at the head. This allows the stack to grow
- Z * to the limits of memory if necessary.
- Z *
- Z */
- Z
- ZLOCAL VOID PushState ()
- Z{
- Z REGISTER struct state *new;
- Z
- Z new = (struct state *) DbugMalloc (sizeof (struct state));
- Z new -> flags = 0;
- Z new -> delay = 0;
- Z new -> maxdepth = MAXDEPTH;
- Z if (stack != NULL) {
- Z new -> level = stack -> level;
- Z } else {
- Z new -> level = 0;
- Z }
- Z new -> out_file = stderr;
- Z new -> functions = NULL;
- Z new -> p_functions = NULL;
- Z new -> keywords = NULL;
- Z new -> processes = NULL;
- Z new -> next_state = stack;
- Z stack = new;
- Z init_done = TRUE;
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DoTrace check to see if tracing is current enabled
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL BOOLEAN DoTrace ()
- Z *
- Z * DESCRIPTION
- Z *
- Z * Checks to see if tracing is enabled based on whether the
- Z * user has specified tracing, the maximum trace depth has
- Z * not yet been reached, the current function is selected,
- Z * and the current process is selected. Returns TRUE if
- Z * tracing is enabled, FALSE otherwise.
- Z *
- Z */
- Z
- ZLOCAL BOOLEAN DoTrace ()
- Z{
- Z REGISTER BOOLEAN trace;
- Z
- Z trace = FALSE;
- Z if (TRACING) {
- Z if (stack -> level <= stack -> maxdepth) {
- Z if (InList (stack -> functions, func)) {
- Z if (InList (stack -> processes, _db_process_)) {
- Z trace = TRUE;
- Z }
- Z }
- Z }
- Z }
- Z return (trace);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DoProfile check to see if profiling is current enabled
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL BOOLEAN DoProfile ()
- Z *
- Z * DESCRIPTION
- Z *
- Z * Checks to see if profiling is enabled based on whether the
- Z * user has specified profiling, the maximum trace depth has
- Z * not yet been reached, the current function is selected,
- Z * and the current process is selected. Returns TRUE if
- Z * profiling is enabled, FALSE otherwise.
- Z *
- Z */
- Z
- ZLOCAL BOOLEAN DoProfile ()
- Z{
- Z REGISTER BOOLEAN profile;
- Z
- Z profile = FALSE;
- Z if (PROFILING) {
- Z if (stack -> level <= stack -> maxdepth) {
- Z if (InList (stack -> p_functions, func)) {
- Z if (InList (stack -> processes, _db_process_)) {
- Z profile = TRUE;
- Z }
- Z }
- Z }
- Z }
- Z return (profile);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_keyword_ test keyword for member of keyword list
- Z *
- Z * SYNOPSIS
- Z *
- Z * BOOLEAN _db_keyword_ (keyword)
- Z * char *keyword;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Test a keyword to determine if it is in the currently active
- Z * keyword list. As with the function list, a keyword is accepted
- Z * if the list is null, otherwise it must match one of the list
- Z * members. When debugging is not on, no keywords are accepted.
- Z * After the maximum trace level is exceeded, no keywords are
- Z * accepted (this behavior subject to change). Additionally,
- Z * the current function and process must be accepted based on
- Z * their respective lists.
- Z *
- Z * Returns TRUE if keyword accepted, FALSE otherwise.
- Z *
- Z */
- Z
- ZBOOLEAN _db_keyword_ (keyword)
- Zchar *keyword;
- Z{
- Z REGISTER BOOLEAN accept;
- Z
- Z if (!init_done) {
- Z _db_push_ ("");
- Z }
- Z accept = FALSE;
- Z if (DEBUGGING) {
- Z if (stack -> level <= stack -> maxdepth) {
- Z if (InList (stack -> functions, func)) {
- Z if (InList (stack -> keywords, keyword)) {
- Z if (InList (stack -> processes, _db_process_)) {
- Z accept = TRUE;
- Z }
- Z }
- Z }
- Z }
- Z }
- Z return (accept);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * Indent indent a line to the given indentation level
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID Indent (indent)
- Z * int indent;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Indent a line to the given level. Note that this is
- Z * a simple minded but portable implementation.
- Z * There are better ways.
- Z *
- Z * Also, the indent must be scaled by the compile time option
- Z * of character positions per nesting level.
- Z *
- Z */
- Z
- ZLOCAL VOID Indent (indent)
- Zint indent;
- Z{
- Z REGISTER int count;
- Z AUTO char buffer[PRINTBUF];
- Z
- Z indent *= INDENT;
- Z for (count = 0; (count < (indent - INDENT)) && (count < (PRINTBUF - 1)); count++) {
- Z if ((count % INDENT) == 0) {
- Z buffer[count] = '|';
- Z } else {
- Z buffer[count] = ' ';
- Z }
- Z }
- Z buffer[count] = EOS;
- Z (VOID) fprintf (_db_fp_, buffer);
- Z (VOID) fflush (_db_fp_);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * FreeList free all memory associated with a linked list
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID FreeList (linkp)
- Z * struct link *linkp;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given pointer to the head of a linked list, frees all
- Z * memory held by the list and the members of the list.
- Z *
- Z */
- Z
- ZLOCAL VOID FreeList (linkp)
- Zstruct link *linkp;
- Z{
- Z REGISTER struct link *old;
- Z
- Z while (linkp != NULL) {
- Z old = linkp;
- Z linkp = linkp -> next_link;
- Z if (old -> string != NULL) {
- Z free (old -> string);
- Z }
- Z free ((char *) old);
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * StrDup make a duplicate of a string in new memory
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL char *StrDup (string)
- Z * char *string;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given pointer to a string, allocates sufficient memory to make
- Z * a duplicate copy, and copies the string to the newly allocated
- Z * memory. Failure to allocated sufficient memory is immediately
- Z * fatal.
- Z *
- Z */
- Z
- Z
- ZLOCAL char *StrDup (string)
- Zchar *string;
- Z{
- Z REGISTER char *new;
- Z
- Z new = (char *) DbugMalloc (strlen (string) + 1);
- Z (VOID) strcpy (new, string);
- Z return (new);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DoPrefix print debugger line prefix prior to indentation
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID DoPrefix (_line_)
- Z * int _line_;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Print prefix common to all debugger output lines, prior to
- Z * doing indentation if necessary. Print such information as
- Z * current process name, current source file name and line number,
- Z * and current function nesting depth.
- Z *
- Z */
- Z
- Z
- ZLOCAL VOID DoPrefix (_line_)
- Zint _line_;
- Z{
- Z#if (unix || xenix)
- Z extern int getpid ();
- Z#endif
- Z
- Z lineno++;
- Z#if (unix || xenix)
- Z if (stack -> flags & PID_ON) {
- Z (VOID) fprintf (_db_fp_, "%5d: ", getpid ());
- Z }
- Z#endif
- Z if (stack -> flags & NUMBER_ON) {
- Z (VOID) fprintf (_db_fp_, "%5d: ", lineno);
- Z }
- Z if (stack -> flags & PROCESS_ON) {
- Z (VOID) fprintf (_db_fp_, "%s: ", _db_process_);
- Z }
- Z if (stack -> flags & FILE_ON) {
- Z (VOID) fprintf (_db_fp_, "%14s: ", file);
- Z }
- Z if (stack -> flags & LINE_ON) {
- Z (VOID) fprintf (_db_fp_, "%5d: ", _line_);
- Z }
- Z if (stack -> flags & DEPTH_ON) {
- Z (VOID) fprintf (_db_fp_, "%4d: ", stack -> level);
- Z }
- Z (VOID) fflush (_db_fp_);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * OpenFile open new output stream for debugger output
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID OpenFile (name)
- Z * char *name;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given name of a new file (or "-" for stdout) opens the file
- Z * and sets the output stream to the new file.
- Z *
- Z */
- Z
- ZLOCAL VOID OpenFile (name)
- Zchar *name;
- Z{
- Z REGISTER FILE *fp;
- Z REGISTER BOOLEAN newfile;
- Z
- Z if (name != NULL) {
- Z if (strcmp (name, "-") == 0) {
- Z _db_fp_ = stdout;
- Z stack -> out_file = _db_fp_;
- Z } else {
- Z if (!Writable (name)) {
- Z (VOID) fprintf (_db_fp_, ERR_OPEN, _db_process_, name);
- Z perror ("");
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z } else {
- Z if (EXISTS (name)) {
- Z newfile = FALSE;
- Z } else {
- Z newfile = TRUE;
- Z }
- Z fp = fopen (name, "a");
- Z if (fp == NULL) {
- Z (VOID) fprintf (_db_fp_, ERR_OPEN, _db_process_, name);
- Z perror ("");
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z } else {
- Z _db_fp_ = fp;
- Z stack -> out_file = fp;
- Z if (newfile) {
- Z ChangeOwner (name);
- Z }
- Z }
- Z }
- Z }
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * OpenProfile open new output stream for profiler output
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID OpenProfile (name)
- Z * char *name;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given name of a new file, opens the file
- Z * and sets the profiler output stream to the new file.
- Z *
- Z * It is currently unclear whether the prefered behavior is
- Z * to truncate any existing file, or simply append to it.
- Z * The latter behavior would be desirable for collecting
- Z * accumulated runtime history over a number of separate
- Z * runs. It might take some changes to the analyzer program
- Z * though, and the notes that Binayak sent with the profiling
- Z * diffs indicated that append was the normal mode, but this
- Z * does not appear to agree with the actual code. I haven't
- Z * investigated at this time [fnf; 24-Jul-87].
- Z */
- Z
- ZLOCAL VOID OpenProfile (name)
- Zchar *name;
- Z{
- Z REGISTER FILE *fp;
- Z REGISTER BOOLEAN newfile;
- Z
- Z if (name != NULL) {
- Z if (!Writable (name)) {
- Z (VOID) fprintf (_db_fp_, ERR_OPEN, _db_process_, name);
- Z perror ("");
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z } else {
- Z if (EXISTS (name)) {
- Z newfile = FALSE;
- Z } else {
- Z newfile = TRUE;
- Z }
- Z fp = fopen (name, "w");
- Z if (fp == NULL) {
- Z (VOID) fprintf (_db_fp_, ERR_OPEN, _db_process_, name);
- Z perror ("");
- Z (VOID) fflush (_db_fp_);
- Z (VOID) Delay (stack -> delay);
- Z } else {
- Z _db_pfp_ = fp;
- Z stack -> prof_file = fp;
- Z if (newfile) {
- Z ChangeOwner (name);
- Z }
- Z }
- Z }
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * CloseFile close the debug output stream
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID CloseFile (fp)
- Z * FILE *fp;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Closes the debug output stream unless it is standard output
- Z * or standard error.
- Z *
- Z */
- Z
- ZLOCAL VOID CloseFile (fp)
- ZFILE *fp;
- Z{
- Z if (fp != stderr && fp != stdout) {
- Z if (fclose (fp) == EOF) {
- Z (VOID) fprintf (stderr, ERR_CLOSE, _db_process_);
- Z perror ("");
- Z (VOID) fflush (stderr);
- Z (VOID) Delay (stack -> delay);
- Z }
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DbugExit print error message and exit
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID DbugExit (why)
- Z * char *why;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Prints error message using current process name, the reason for
- Z * aborting (typically out of memory), and exits with status 1.
- Z * This should probably be changed to use a status code
- Z * defined in the user's debugger include file.
- Z *
- Z */
- Z
- ZLOCAL VOID DbugExit (why)
- Zchar *why;
- Z{
- Z (VOID) fprintf (stderr, ERR_ABORT, _db_process_, why);
- Z (VOID) fflush (stderr);
- Z (VOID) Delay (stack -> delay);
- Z exit (1);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DbugMalloc allocate memory for debugger runtime support
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL long *DbugMalloc (size)
- Z * int size;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Allocate more memory for debugger runtime support functions.
- Z * Failure to to allocate the requested number of bytes is
- Z * immediately fatal to the current process. This may be
- Z * rather unfriendly behavior. It might be better to simply
- Z * print a warning message, freeze the current debugger state,
- Z * and continue execution.
- Z *
- Z */
- Z
- ZLOCAL long *DbugMalloc (size)
- Zint size;
- Z{
- Z register long *new;
- Z
- Z new = (long *) malloc ((unsigned int) size);
- Z if (new == NULL) {
- Z DbugExit ("out of memory");
- Z }
- Z return (new);
- Z}
- Z
- Z
- Z/*
- Z * This function may be eliminated when strtok is available
- Z * in the runtime environment (missing from BSD4.1).
- Z */
- Z
- ZLOCAL char *strtok (s1, s2)
- Zchar *s1, *s2;
- Z{
- Z static char *end = NULL;
- Z REGISTER char *rtnval;
- Z
- Z rtnval = NULL;
- Z if (s2 != NULL) {
- Z if (s1 != NULL) {
- Z end = s1;
- Z rtnval = strtok ((char *) NULL, s2);
- Z } else if (end != NULL) {
- Z if (*end != EOS) {
- Z rtnval = end;
- Z while (*end != *s2 && *end != EOS) {end++;}
- Z if (*end != EOS) {
- Z *end++ = EOS;
- Z }
- Z }
- Z }
- Z }
- Z return (rtnval);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * BaseName strip leading pathname components from name
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL char *BaseName (pathname)
- Z * char *pathname;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Given pointer to a complete pathname, locates the base file
- Z * name at the end of the pathname and returns a pointer to
- Z * it.
- Z *
- Z */
- Z
- ZLOCAL char *BaseName (pathname)
- Zchar *pathname;
- Z{
- Z register char *base;
- Z
- Z base = strrchr (pathname, '/');
- Z if (base++ == NULL) {
- Z base = pathname;
- Z }
- Z return (base);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * Writable test to see if a pathname is writable/creatable
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL BOOLEAN Writable (pathname)
- Z * char *pathname;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Because the debugger might be linked in with a program that
- Z * runs with the set-uid-bit (suid) set, we have to be careful
- Z * about opening a user named file for debug output. This consists
- Z * of checking the file for write access with the real user id,
- Z * or checking the directory where the file will be created.
- Z *
- Z * Returns TRUE if the user would normally be allowed write or
- Z * create access to the named file. Returns FALSE otherwise.
- Z *
- Z */
- Z
- ZLOCAL BOOLEAN Writable (pathname)
- Zchar *pathname;
- Z{
- Z REGISTER BOOLEAN granted;
- Z#if (unix || xenix)
- Z REGISTER char *lastslash;
- Z#endif
- Z
- Z#if (!unix && !xenix)
- Z granted = TRUE;
- Z#else
- Z granted = FALSE;
- Z if (EXISTS (pathname)) {
- Z if (WRITABLE (pathname)) {
- Z granted = TRUE;
- Z }
- Z } else {
- Z lastslash = strrchr (pathname, '/');
- Z if (lastslash != NULL) {
- Z *lastslash = EOS;
- Z } else {
- Z pathname = ".";
- Z }
- Z if (WRITABLE (pathname)) {
- Z granted = TRUE;
- Z }
- Z if (lastslash != NULL) {
- Z *lastslash = '/';
- Z }
- Z }
- Z#endif
- Z return (granted);
- Z}
- Z
- Z
- Z/*
- Z * This function may be eliminated when strrchr is available
- Z * in the runtime environment (missing from BSD4.1).
- Z * Alternately, you can use rindex() on BSD systems.
- Z */
- Z
- ZLOCAL char *strrchr (s, c)
- Zchar *s;
- Zchar c;
- Z{
- Z REGISTER char *scan;
- Z
- Z for (scan = s; *scan != EOS; scan++) {;}
- Z while (scan > s && *--scan != c) {;}
- Z if (*scan != c) {
- Z scan = NULL;
- Z }
- Z return (scan);
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * ChangeOwner change owner to real user for suid programs
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID ChangeOwner (pathname)
- Z *
- Z * DESCRIPTION
- Z *
- Z * For unix systems, change the owner of the newly created debug
- Z * file to the real owner. This is strictly for the benefit of
- Z * programs that are running with the set-user-id bit set.
- Z *
- Z * Note that at this point, the fact that pathname represents
- Z * a newly created file has already been established. If the
- Z * program that the debugger is linked to is not running with
- Z * the suid bit set, then this operation is redundant (but
- Z * harmless).
- Z *
- Z */
- Z
- ZLOCAL VOID ChangeOwner (pathname)
- Zchar *pathname;
- Z{
- Z#if (unix || xenix)
- Z if (chown (pathname, getuid (), getgid ()) == -1) {
- Z (VOID) fprintf (stderr, ERR_CHOWN, _db_process_, pathname);
- Z perror ("");
- Z (VOID) fflush (stderr);
- Z (VOID) Delay (stack -> delay);
- Z }
- Z#endif
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_setjmp_ save debugger environment
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_setjmp_ ()
- Z *
- Z * DESCRIPTION
- Z *
- Z * Invoked as part of the user's DBUG_SETJMP macro to save
- Z * the debugger environment in parallel with saving the user's
- Z * environment.
- Z *
- Z */
- Z
- ZVOID _db_setjmp_ ()
- Z{
- Z jmplevel = stack -> level;
- Z jmpfunc = func;
- Z jmpfile = file;
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * _db_longjmp_ restore previously saved debugger environment
- Z *
- Z * SYNOPSIS
- Z *
- Z * VOID _db_longjmp_ ()
- Z *
- Z * DESCRIPTION
- Z *
- Z * Invoked as part of the user's DBUG_LONGJMP macro to restore
- Z * the debugger environment in parallel with restoring the user's
- Z * previously saved environment.
- Z *
- Z */
- Z
- ZVOID _db_longjmp_ ()
- Z{
- Z stack -> level = jmplevel;
- Z if (jmpfunc) {
- Z func = jmpfunc;
- Z }
- Z if (jmpfile) {
- Z file = jmpfile;
- Z }
- Z}
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * DelayArg convert D flag argument to appropriate value
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL int DelayArg (value)
- Z * int value;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Converts delay argument, given in tenths of a second, to the
- Z * appropriate numerical argument used by the system to delay
- Z * that that many tenths of a second. For example, on the
- Z * amiga, there is a system call "Delay()" which takes an
- Z * argument in ticks (50 per second). On unix, the sleep
- Z * command takes seconds. Thus a value of "10", for one
- Z * second of delay, gets converted to 50 on the amiga, and 1
- Z * on unix. Other systems will need to use a timing loop.
- Z *
- Z */
- Z
- ZLOCAL int DelayArg (value)
- Zint value;
- Z{
- Z unsigned int delayarg = 0;
- Z
- Z#if (unix || xenix)
- Z delayarg = value / 10; /* Delay is in seconds for sleep () */
- Z#endif
- Z#if amiga
- Z delayarg = (HZ * value) / 10; /* Delay in ticks for Delay () */
- Z#endif
- Z return (delayarg);
- Z}
- Z
- Z
- Z/*
- Z * A dummy delay stub for systems that do not support delays.
- Z * With a little work, this can be turned into a timing loop.
- Z */
- Z
- Z#if (!unix && !xenix && !amiga)
- ZDelay ()
- Z{
- Z}
- Z#endif
- Z
- Z
- Z/*
- Z * FUNCTION
- Z *
- Z * perror perror simulation for systems that don't have it
- Z *
- Z * SYNOPSIS
- Z *
- Z * LOCAL VOID perror (s)
- Z * char *s;
- Z *
- Z * DESCRIPTION
- Z *
- Z * Perror produces a message on the standard error stream which
- Z * provides more information about the library or system error
- Z * just encountered. The argument string s is printed, followed
- Z * by a ':', a blank, and then a message and a newline.
- Z *
- Z * An undocumented feature of the unix perror is that if the string
- Z * 's' is a null string (NOT a NULL pointer!), then the ':' and
- Z * blank are not printed.
- Z *
- Z * This version just complains about an "unknown system error".
- Z *
- Z */
- Z
- Z#if !unix && !xenix && !(amiga && LATTICE)
- Z
- ZLOCAL VOID perror (s)
- Zchar *s;
- Z{
- Z if (s && *s != EOS) {
- Z (VOID) fprintf (stderr, "%s: ", s);
- Z }
- Z (VOID) fprintf (stderr, "<unknown system error>\n");
- Z}
- Z
- Z#endif /* !unix && !xenix && !(amiga && LATTICE) */
- Z
- Z/*
- Z * Here we need the definitions of the clock routine. Add your
- Z * own for whatever system that you have.
- Z */
- Z
- Z#if (unix || xenix)
- Z
- Z# include <sys/param.h>
- Z# if BSD4_3 || sun
- Z
- Z/*
- Z * Definition of the Clock() routine for 4.3 BSD.
- Z */
- Z
- Z#include <sys/time.h>
- Z#include <sys/resource.h>
- Z
- Z/*
- Z * Returns the user time in milliseconds used by this process so
- Z * far.
- Z */
- Z
- ZLOCAL unsigned long Clock ()
- Z{
- Z struct rusage ru;
- Z
- Z (VOID) getrusage (RUSAGE_SELF, &ru);
- Z return ((ru.ru_utime.tv_sec * 1000) + (ru.ru_utime.tv_usec / 1000));
- Z}
- Z
- Z#else
- Z
- ZLOCAL unsigned long Clock ()
- Z{
- Z return (0);
- Z}
- Z
- Z# endif
- Z
- Z#else
- Z
- Z#if amiga
- Z
- Zstruct DateStamp { /* Yes, this is a hack, but doing it right */
- Z long ds_Days; /* is incredibly ugly without splitting this */
- Z long ds_Minute; /* off into a separate file */
- Z long ds_Tick;
- Z};
- Z
- Zstatic int first_clock = TRUE;
- Zstatic struct DateStamp begin;
- Zstatic struct DateStamp elapsed;
- Z
- ZLOCAL unsigned long Clock ()
- Z{
- Z register struct DateStamp *now;
- Z register unsigned long millisec = 0;
- Z extern VOID *AllocMem ();
- Z
- Z now = (struct DateStamp *) AllocMem ((long) sizeof (struct DateStamp), 0L);
- Z if (now != NULL) {
- Z if (first_clock == TRUE) {
- Z first_clock = FALSE;
- Z (VOID) DateStamp (now);
- Z begin = *now;
- Z }
- Z (VOID) DateStamp (now);
- Z millisec = 24 * 3600 * (1000 / HZ) * (now -> ds_Days - begin.ds_Days);
- Z millisec += 60 * (1000 / HZ) * (now -> ds_Minute - begin.ds_Minute);
- Z millisec += (1000 / HZ) * (now -> ds_Tick - begin.ds_Tick);
- Z (VOID) FreeMem (now, (long) sizeof (struct DateStamp));
- Z }
- Z return (millisec);
- Z}
- Z
- Z#endif /* amiga */
- Z#endif /* unix */
- STUNKYFLUFF
- set `sum dbug.c`
- if test 40274 != $1
- then
- echo dbug.c: Checksum error. Is: $1, should be: 40274.
- fi
- #
- #
- echo Extracting Makefile:
- sed 's/^Z//' >Makefile <<\STUNKYFLUFF
- Z#
- Z# FILE
- Z#
- Z# Makefile Makefile for dbug package
- Z#
- Z# SCCS ID
- Z#
- Z# @(#)Makefile 1.11 3/12/88
- Z#
- Z# DESCRIPTION
- Z#
- Z# Makefile for the dbug package (under UNIX system V or 4.2BSD).
- Z#
- Z# Interesting things to make are:
- Z#
- Z# lib => Makes the runtime support library in the
- Z# current directory.
- Z#
- Z# lintlib => Makes the lint library in the current directory.
- Z#
- Z# install => Install pieces from current directory to
- Z# where they belong.
- Z#
- Z# doc => Makes the documentation in the current
- Z# directory.
- Z#
- Z# clean => Remove objects, temporary files, etc from
- Z# current directory.
- Z#
- Z# superclean => Remove everything except sccs source files.
- Z# Uses interactive remove for verification.
- Z
- Z# Define NO_VARARGS if you have no <varargs.h> to include.
- Z#VARARGS = -DNO_VARARGS
- Z
- ZSH = /bin/sh
- ZAR = ar
- ZRM = rm
- ZCFLAGS = -O $(VARARGS)
- ZGFLAGS = -s
- ZINSTALL = $(SH) install.sh
- ZCHMOD = chmod
- ZMAKE = make
- ZINC = /usr/include/local
- ZLIB = /usr/lib
- ZRANLIB = $(SH) ranlib.sh
- ZMODE = 664
- Z
- Z# The following is provided for example only, it is set by "doinstall.sh".
- ZLLIB = /usr/lib
- Z
- Z.SUFFIXES: .r .r~ .c .c~
- Z
- Z.c~.c:
- Z $(GET) $(GFLAGS) -p $< >$*.c
- Z
- Z.r~.r:
- Z $(GET) $(GFLAGS) -p $< >$*.r
- Z
- Z.c~.r:
- Z $(GET) $(GFLAGS) -p $< >$*.c
- Z sed "s/\\\/\\\e/" <$*.c >$*.r
- Z $(RM) -f $*.c
- Z
- Z.c.r:
- Z sed "s/\\\/\\\e/" <$< >$*.r
- Z
- ZEXAMPLES = example1.r example2.r example3.r
- ZOUTPUTS = output1.r output2.r output3.r output4.r output5.r
- Z
- ZNROFF_INC = main.r factorial.r $(OUTPUTS) $(EXAMPLES)
- Z
- Z
- Z#
- Z# The default thing to do is remake the local runtime support
- Z# library, local lint library, and local documentation as
- Z# necessary.
- Z#
- Z
- Zall : lib lintlib analyze doc
- Z
- Zlib : libdbug.a
- Z
- Zlintlib : llib-ldbug.ln
- Z
- Zdoc : factorial user.t
- Z
- Z#
- Z# Make the local runtime support library "libdbug.a" from
- Z# sources.
- Z#
- Z
- Zlibdbug.a : dbug.o
- Z rm -f $@
- Z $(AR) cr $@ $?
- Z $(RANLIB) $@
- Z
- Z#
- Z# Clean up the local directory.
- Z#
- Z
- Zclean :
- Z $(RM) -f *.o *.ln *.a *.BAK nohup.out factorial $(NROFF_INC)
- Z
- Zsuperclean :
- Z $(RM) -i ?[!.]*
- Z
- Z#
- Z# Install the new header and library files. Since things go in
- Z# different places depending upon the system (lint libraries
- Z# go in /usr/lib under SV and /usr/lib/lint under BSD for example),
- Z# the shell script "doinstall.sh" figures out the environment and
- Z# does a recursive make with the appropriate pathnames set.
- Z#
- Z
- Zinstall :
- Z $(SH) doinstall.sh $(MAKE) sysinstall
- Z
- Zsysinstall: $(INC) $(INC)/dbug.h $(LIB)/libdbug.a \
- Z $(LLIB)/llib-ldbug.ln $(LLIB)/llib-ldbug
- Z
- Z$(INC) :
- Z -if test -d $@ ;then true ;else mkdir $@ ;fi
- Z
- Z$(INC)/dbug.h : dbug.h
- Z $(INSTALL) $? $@
- Z $(CHMOD) $(MODE) $@
- Z
- Z$(LIB)/libdbug.a : libdbug.a
- Z $(INSTALL) $? $@
- Z $(CHMOD) $(MODE) $@
- Z
- Z$(LLIB)/llib-ldbug.ln : llib-ldbug.ln
- Z $(INSTALL) $? $@
- Z $(CHMOD) $(MODE) $@
- Z
- Z$(LLIB)/llib-ldbug : llib-ldbug
- Z $(INSTALL) $? $@
- Z $(CHMOD) $(MODE) $@
- Z
- Z#
- Z# Make the local lint library.
- Z#
- Z
- Zllib-ldbug.ln : llib-ldbug
- Z $(SH) mklintlib.sh $? $@
- Z
- Z#
- Z# Make the test/example program "factorial".
- Z#
- Z# Note that the objects depend on the LOCAL dbug.h file and
- Z# the compilations are set up to find dbug.h in the current
- Z# directory even though the sources have "#include <dbug.h>".
- Z# This allows the examples to look like the code a user would
- Z# write but still be used as test cases for new versions
- Z# of dbug.
- Z
- Zfactorial : main.o factorial.o libdbug.a
- Z $(CC) -o $@ main.o factorial.o libdbug.a
- Z
- Zmain.o : main.c dbug.h
- Z $(CC) $(CFLAGS) -c -I. main.c
- Z
- Zfactorial.o : factorial.c dbug.h
- Z $(CC) $(CFLAGS) -c -I. factorial.c
- Z
- Z
- Z#
- Z# Make the analyze program for runtime profiling support.
- Z#
- Z
- Zanalyze : analyze.o libdbug.a
- Z $(CC) -o $@ analyze.o libdbug.a
- Z
- Zanalyze.o : analyze.c useful.h dbug.h
- Z $(CC) $(CFLAGS) -c -I. analyze.c
- Z
- Z#
- Z# Rebuild the documentation
- Z#
- Z
- Zuser.t : user.r $(NROFF_INC)
- Z nroff -cm user.r >$@
- Z
- Z#
- Z# Run the factorial program to produce the sample outputs.
- Z#
- Z
- Zoutput1.r: factorial
- Z ./factorial 1 2 3 4 5 >$@
- Z
- Zoutput2.r: factorial
- Z ./factorial -#t:o 2 3 >$@
- Z
- Zoutput3.r: factorial
- Z ./factorial -#d:t:o 3 >$@
- Z
- Zoutput4.r: factorial
- Z ./factorial -#d,result:o 4 >$@
- Z
- Zoutput5.r: factorial
- Z ./factorial -#d:f,factorial:F:L:o 3 >$@
- Z
- Z#
- Z# All files included by user.r depend on user.r, thus
- Z# forcing them to be remade if user.r changes.
- Z#
- Z
- Z$(NROFF_INC) : user.r
- Z
- STUNKYFLUFF
- set `sum Makefile`
- if test 62626 != $1
- then
- echo Makefile: Checksum error. Is: $1, should be: 62626.
- fi
- #
- #
- echo Extracting README.prof:
- sed 's/^Z//' >README.prof <<\STUNKYFLUFF
- ZHi,
- Z
- ZI'm sending you the modifications I made to your Dbug routines to
- Zallow profiling in a (relatively) machine independent fashion.
- ZI use your Dbug routines fairly extensively. Unfortunately, it's
- Za royal pain to have to keep profiled versions of various libraries
- Zaround. The modifications allow profiling without the need for this.
- Z
- ZHow it works.
- Z------------
- Z
- ZBasically, I just added code in the dbug routines to write out a file
- Zcalled dbugmon.out (by default). This is an ascii file containing lines
- Zof the form:
- Z
- Z<function-name> E <time-entered>
- Z<function-name> X <time-exited>
- Z
- ZA second program (analyze) reads this file, and produces a report on
- Zstandard output.
- Z
- ZProfiling is enabled through the `g' flag. It can take a list of
- Zprocedure names for which profiling is enabled. By default, it
- Zprofiles all procedures.
- Z
- ZThe code in ``dbug.c'' opens the profile file for appending. This
- Zis in order that one can run a program several times, and get the
- Zsum total of all the times, etc.
- Z
- ZThe only system dependent part that I'm aware of is the routine
- ZClock() at the end of dbug.c. This returns the elapsed user time
- Zin milliseconds. The version which I have is for 4.3 BSD. As I
- Zdon't have access to other systems, I'm not certain how this would
- Zchange.
- Z
- ZAn example of the report generated follows:
- Z
- Z Profile of Execution
- Z Execution times are in milliseconds
- Z
- Z Calls Time
- Z ----- ----
- Z Times Percentage Time Spent Percentage
- ZFunction Called of total in Function of total Importance
- Z======== ====== ========== =========== ========== ==========
- Zfactorial 5 83.33 30 100.00 8333
- Zmain 1 16.67 0 0.00 0
- Z======== ====== ========== =========== ==========
- ZTotals 6 100.00 30 100.00
- Z
- Z
- ZAs you can see, it's quite self-evident. The ``Importance'' column is a
- Zmetric obtained by multiplying the percentage of the calls and the percentage
- Zof the time. Functions with higher 'importance' benefit the most from
- Zbeing sped up.
- Z
- ZI'm really not certain how to add support for setjmp/longjmp, or for
- Zchild processes, so I've ignored that for the time being. In most of
- Zthe code that I write, it isn't necessary. If you have any good ideas,
- Zfeel free to add them.
- Z
- ZThis has been very useful to me. If you can use it as part of your
- Zdbug distribution, please feel free to do so.
- Z
- ZRegards,
- Z
- Z Binayak Banerjee
- Z {allegra | astrovax | bpa | burdvax}!sjuvax!bbanerje
- Z bbanerje%sjuvax.sju.edu@relay.cs.net
- Z July 9, 1987
- STUNKYFLUFF
- set `sum README.prof`
- if test 15724 != $1
- then
- echo README.prof: Checksum error. Is: $1, should be: 15724.
- fi
- echo ALL DONE BUNKY!
- exit 0
-
-
-