usr/src/ucb/pascal/pdx/breakpoint.h

/* Copyright (c) 1982 Regents of the University of California */

/* static char sccsid[] = "@(#)breakpoint.h 1.2 1/18/82"; */

/*
 * Breakpoint module definitions.
 *
 * This module contains routines that manage breakpoints at a high level.
 * This includes adding and deleting breakpoints, handling the various
 * types of breakpoints when they happen, management of conditions for
 * breakpoints, and display information after single stepping.
 */

unsigned short tracing;
unsigned short var_tracing;
unsigned short inst_tracing;

BOOLEAN isstopped;

#define ss_lines                (tracing != 0)
#define ss_variables            (var_tracing != 0)
#define ss_instructions         (inst_tracing != 0)
#define single_stepping         (ss_lines || ss_variables || ss_instructions)

/*
 * types of breakpoints
 */

typedef enum {
        ALL_ON,                 /* turn TRACE on */
        ALL_OFF,                /* turn TRACE off */
        INST,                   /* trace instruction (source line) */
        CALL, RETURN,           /* trace procedure/function */
        BLOCK_ON,               /* set CALL breakpoint */
        BLOCK_OFF,              /* clear CALL breakpoint */
        TERM_ON,                /* turn TRACEVAR on */
        TERM_OFF,               /* turn TRACEVAR off */
        AT_BP,                  /* print expression at a line */
        STOP_BP,                /* stop execution */
        CALLPROC,               /* return from a "call"-ed procedure */
        END_BP,                 /* return from program */
        STOP_ON,                /* start looking for stop condition */
        STOP_OFF,               /* stop looking for stop condition */
} BPTYPE;

/*
 * Things that are on the tracing or condition list are either
 * associated with the trace (implying printing) or stop commands.
 */

typedef enum { TRPRINT, TRSTOP } TRTYPE;

/*
 * routines available from this module
 */

addvar();               /* add a variable to the trace list */
delvar();               /* delete a variable from the trace list */
printvarnews();         /* print out variables that have changed */
trfree();               /* free the entire trace list */
addcond();              /* add a condition to the list */
delcond();              /* delete a condition from the list */
BOOLEAN trcond();       /* determine if any trace condition is true */
BOOLEAN stopcond();     /* determine if any stop condition is true */

addbp();                /* add a breakpoint */
delbp();                /* delete a breakpoint, return FALSE if unsuccessful */
bpfree();               /* free all breakpoint information */
setallbps();            /* set traps for all breakpoints */
unsetallbps();          /* remove traps at all breakpoints */
BOOLEAN bpact();        /* handle a breakpoint */
fixbps();               /* destroy temporary breakpoints left after a fault */
status();               /* list items being traced */