patch 8.1.1195: Vim script debugger functionality needs cleanupv8.1.1195

Problem:    Vim script debugger functionality needs cleanup.
Solution:   Move debugger code to a separate file.  Add more tests. (Yegappan
            Lakshmanan, closes #4285)

1 files changed, 990 insertions, 0 deletions

diff --git a/src/debugger.c b/src/debugger.c
new file mode 100644
index 000000000..10dc86dcc
--- /dev/null
+++ b/src/debugger.c
@@ -0,0 +1,990 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * debugger.c: Vim script debugger functions
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+static int debug_greedy = FALSE;	/* batch mode debugging: don't save
+					   and restore typeahead. */
+static void do_setdebugtracelevel(char_u *arg);
+static void do_checkbacktracelevel(void);
+static void do_showbacktrace(char_u *cmd);
+
+static char_u *debug_oldval = NULL;	/* old and newval for debug expressions */
+static char_u *debug_newval = NULL;
+static int     debug_expr   = 0;        /* use debug_expr */
+
+    int
+has_watchexpr(void)
+{
+    return debug_expr;
+}
+
+/*
+ * do_debug(): Debug mode.
+ * Repeatedly get Ex commands, until told to continue normal execution.
+ */
+    void
+do_debug(char_u *cmd)
+{
+    int		save_msg_scroll = msg_scroll;
+    int		save_State = State;
+    int		save_did_emsg = did_emsg;
+    int		save_cmd_silent = cmd_silent;
+    int		save_msg_silent = msg_silent;
+    int		save_emsg_silent = emsg_silent;
+    int		save_redir_off = redir_off;
+    tasave_T	typeaheadbuf;
+    int		typeahead_saved = FALSE;
+    int		save_ignore_script = 0;
+    int		save_ex_normal_busy;
+    int		n;
+    char_u	*cmdline = NULL;
+    char_u	*p;
+    char	*tail = NULL;
+    static int	last_cmd = 0;
+#define CMD_CONT	1
+#define CMD_NEXT	2
+#define CMD_STEP	3
+#define CMD_FINISH	4
+#define CMD_QUIT	5
+#define CMD_INTERRUPT	6
+#define CMD_BACKTRACE	7
+#define CMD_FRAME	8
+#define CMD_UP		9
+#define CMD_DOWN	10
+
+#ifdef ALWAYS_USE_GUI
+    /* Can't do this when there is no terminal for input/output. */
+    if (!gui.in_use)
+    {
+	/* Break as soon as possible. */
+	debug_break_level = 9999;
+	return;
+    }
+#endif
+
+    /* Make sure we are in raw mode and start termcap mode.  Might have side
+     * effects... */
+    settmode(TMODE_RAW);
+    starttermcap();
+
+    ++RedrawingDisabled;	/* don't redisplay the window */
+    ++no_wait_return;		/* don't wait for return */
+    did_emsg = FALSE;		/* don't use error from debugged stuff */
+    cmd_silent = FALSE;		/* display commands */
+    msg_silent = FALSE;		/* display messages */
+    emsg_silent = FALSE;	/* display error messages */
+    redir_off = TRUE;		/* don't redirect debug commands */
+
+    State = NORMAL;
+    debug_mode = TRUE;
+
+    if (!debug_did_msg)
+	msg(_("Entering Debug mode.  Type \"cont\" to continue."));
+    if (debug_oldval != NULL)
+    {
+	smsg(_("Oldval = \"%s\""), debug_oldval);
+	vim_free(debug_oldval);
+	debug_oldval = NULL;
+    }
+    if (debug_newval != NULL)
+    {
+	smsg(_("Newval = \"%s\""), debug_newval);
+	vim_free(debug_newval);
+	debug_newval = NULL;
+    }
+    if (sourcing_name != NULL)
+	msg((char *)sourcing_name);
+    if (sourcing_lnum != 0)
+	smsg(_("line %ld: %s"), (long)sourcing_lnum, cmd);
+    else
+	smsg(_("cmd: %s"), cmd);
+    /*
+     * Repeat getting a command and executing it.
+     */
+    for (;;)
+    {
+	msg_scroll = TRUE;
+	need_wait_return = FALSE;
+
+	/* Save the current typeahead buffer and replace it with an empty one.
+	 * This makes sure we get input from the user here and don't interfere
+	 * with the commands being executed.  Reset "ex_normal_busy" to avoid
+	 * the side effects of using ":normal". Save the stuff buffer and make
+	 * it empty. Set ignore_script to avoid reading from script input. */
+	save_ex_normal_busy = ex_normal_busy;
+	ex_normal_busy = 0;
+	if (!debug_greedy)
+	{
+	    save_typeahead(&typeaheadbuf);
+	    typeahead_saved = TRUE;
+	    save_ignore_script = ignore_script;
+	    ignore_script = TRUE;
+	}
+
+	vim_free(cmdline);
+	cmdline = getcmdline_prompt('>', NULL, 0, EXPAND_NOTHING, NULL);
+
+	if (typeahead_saved)
+	{
+	    restore_typeahead(&typeaheadbuf);
+	    ignore_script = save_ignore_script;
+	}
+	ex_normal_busy = save_ex_normal_busy;
+
+	cmdline_row = msg_row;
+	msg_starthere();
+	if (cmdline != NULL)
+	{
+	    /* If this is a debug command, set "last_cmd".
+	     * If not, reset "last_cmd".
+	     * For a blank line use previous command. */
+	    p = skipwhite(cmdline);
+	    if (*p != NUL)
+	    {
+		switch (*p)
+		{
+		    case 'c': last_cmd = CMD_CONT;
+			      tail = "ont";
+			      break;
+		    case 'n': last_cmd = CMD_NEXT;
+			      tail = "ext";
+			      break;
+		    case 's': last_cmd = CMD_STEP;
+			      tail = "tep";
+			      break;
+		    case 'f':
+			      last_cmd = 0;
+			      if (p[1] == 'r')
+			      {
+				  last_cmd = CMD_FRAME;
+				  tail = "rame";
+			      }
+			      else
+			      {
+				  last_cmd = CMD_FINISH;
+				  tail = "inish";
+			      }
+			      break;
+		    case 'q': last_cmd = CMD_QUIT;
+			      tail = "uit";
+			      break;
+		    case 'i': last_cmd = CMD_INTERRUPT;
+			      tail = "nterrupt";
+			      break;
+		    case 'b': last_cmd = CMD_BACKTRACE;
+			      if (p[1] == 't')
+				  tail = "t";
+			      else
+				  tail = "acktrace";
+			      break;
+		    case 'w': last_cmd = CMD_BACKTRACE;
+			      tail = "here";
+			      break;
+		    case 'u': last_cmd = CMD_UP;
+			      tail = "p";
+			      break;
+		    case 'd': last_cmd = CMD_DOWN;
+			      tail = "own";
+			      break;
+		    default: last_cmd = 0;
+		}
+		if (last_cmd != 0)
+		{
+		    /* Check that the tail matches. */
+		    ++p;
+		    while (*p != NUL && *p == *tail)
+		    {
+			++p;
+			++tail;
+		    }
+		    if (ASCII_ISALPHA(*p) && last_cmd != CMD_FRAME)
+			last_cmd = 0;
+		}
+	    }
+
+	    if (last_cmd != 0)
+	    {
+		/* Execute debug command: decided where to break next and
+		 * return. */
+		switch (last_cmd)
+		{
+		    case CMD_CONT:
+			debug_break_level = -1;
+			break;
+		    case CMD_NEXT:
+			debug_break_level = ex_nesting_level;
+			break;
+		    case CMD_STEP:
+			debug_break_level = 9999;
+			break;
+		    case CMD_FINISH:
+			debug_break_level = ex_nesting_level - 1;
+			break;
+		    case CMD_QUIT:
+			got_int = TRUE;
+			debug_break_level = -1;
+			break;
+		    case CMD_INTERRUPT:
+			got_int = TRUE;
+			debug_break_level = 9999;
+			/* Do not repeat ">interrupt" cmd, continue stepping. */
+			last_cmd = CMD_STEP;
+			break;
+		    case CMD_BACKTRACE:
+			do_showbacktrace(cmd);
+			continue;
+		    case CMD_FRAME:
+			if (*p == NUL)
+			{
+			    do_showbacktrace(cmd);
+			}
+			else
+			{
+			    p = skipwhite(p);
+			    do_setdebugtracelevel(p);
+			}
+			continue;
+		    case CMD_UP:
+			debug_backtrace_level++;
+			do_checkbacktracelevel();
+			continue;
+		    case CMD_DOWN:
+			debug_backtrace_level--;
+			do_checkbacktracelevel();
+			continue;
+		}
+		/* Going out reset backtrace_level */
+		debug_backtrace_level = 0;
+		break;
+	    }
+
+	    /* don't debug this command */
+	    n = debug_break_level;
+	    debug_break_level = -1;
+	    (void)do_cmdline(cmdline, getexline, NULL,
+						DOCMD_VERBOSE|DOCMD_EXCRESET);
+	    debug_break_level = n;
+	}
+	lines_left = Rows - 1;
+    }
+    vim_free(cmdline);
+
+    --RedrawingDisabled;
+    --no_wait_return;
+    redraw_all_later(NOT_VALID);
+    need_wait_return = FALSE;
+    msg_scroll = save_msg_scroll;
+    lines_left = Rows - 1;
+    State = save_State;
+    debug_mode = FALSE;
+    did_emsg = save_did_emsg;
+    cmd_silent = save_cmd_silent;
+    msg_silent = save_msg_silent;
+    emsg_silent = save_emsg_silent;
+    redir_off = save_redir_off;
+
+    /* Only print the message again when typing a command before coming back
+     * here. */
+    debug_did_msg = TRUE;
+}
+
+    static int
+get_maxbacktrace_level(void)
+{
+    char	*p, *q;
+    int		maxbacktrace = 0;
+
+    if (sourcing_name != NULL)
+    {
+	p = (char *)sourcing_name;
+	while ((q = strstr(p, "..")) != NULL)
+	{
+	    p = q + 2;
+	    maxbacktrace++;
+	}
+    }
+    return maxbacktrace;
+}
+
+    static void
+do_setdebugtracelevel(char_u *arg)
+{
+    int level;
+
+    level = atoi((char *)arg);
+    if (*arg == '+' || level < 0)
+	debug_backtrace_level += level;
+    else
+	debug_backtrace_level = level;
+
+    do_checkbacktracelevel();
+}
+
+    static void
+do_checkbacktracelevel(void)
+{
+    if (debug_backtrace_level < 0)
+    {
+	debug_backtrace_level = 0;
+	msg(_("frame is zero"));
+    }
+    else
+    {
+	int max = get_maxbacktrace_level();
+
+	if (debug_backtrace_level > max)
+	{
+	    debug_backtrace_level = max;
+	    smsg(_("frame at highest level: %d"), max);
+	}
+    }
+}
+
+    static void
+do_showbacktrace(char_u *cmd)
+{
+    char    *cur;
+    char    *next;
+    int	    i = 0;
+    int	    max = get_maxbacktrace_level();
+
+    if (sourcing_name != NULL)
+    {
+	cur = (char *)sourcing_name;
+	while (!got_int)
+	{
+	    next = strstr(cur, "..");
+	    if (next != NULL)
+		*next = NUL;
+	    if (i == max - debug_backtrace_level)
+		smsg("->%d %s", max - i, cur);
+	    else
+		smsg("  %d %s", max - i, cur);
+	    ++i;
+	    if (next == NULL)
+		break;
+	    *next = '.';
+	    cur = next + 2;
+	}
+    }
+    if (sourcing_lnum != 0)
+       smsg(_("line %ld: %s"), (long)sourcing_lnum, cmd);
+    else
+       smsg(_("cmd: %s"), cmd);
+}
+
+/*
+ * ":debug".
+ */
+    void
+ex_debug(exarg_T *eap)
+{
+    int		debug_break_level_save = debug_break_level;
+
+    debug_break_level = 9999;
+    do_cmdline_cmd(eap->arg);
+    debug_break_level = debug_break_level_save;
+}
+
+static char_u	*debug_breakpoint_name = NULL;
+static linenr_T	debug_breakpoint_lnum;
+
+/*
+ * When debugging or a breakpoint is set on a skipped command, no debug prompt
+ * is shown by do_one_cmd().  This situation is indicated by debug_skipped, and
+ * debug_skipped_name is then set to the source name in the breakpoint case.  If
+ * a skipped command decides itself that a debug prompt should be displayed, it
+ * can do so by calling dbg_check_skipped().
+ */
+static int	debug_skipped;
+static char_u	*debug_skipped_name;
+
+/*
+ * Go to debug mode when a breakpoint was encountered or "ex_nesting_level" is
+ * at or below the break level.  But only when the line is actually
+ * executed.  Return TRUE and set breakpoint_name for skipped commands that
+ * decide to execute something themselves.
+ * Called from do_one_cmd() before executing a command.
+ */
+    void
+dbg_check_breakpoint(exarg_T *eap)
+{
+    char_u	*p;
+
+    debug_skipped = FALSE;
+    if (debug_breakpoint_name != NULL)
+    {
+	if (!eap->skip)
+	{
+	    /* replace K_SNR with "<SNR>" */
+	    if (debug_breakpoint_name[0] == K_SPECIAL
+		    && debug_breakpoint_name[1] == KS_EXTRA
+		    && debug_breakpoint_name[2] == (int)KE_SNR)
+		p = (char_u *)"<SNR>";
+	    else
+		p = (char_u *)"";
+	    smsg(_("Breakpoint in \"%s%s\" line %ld"),
+		    p,
+		    debug_breakpoint_name + (*p == NUL ? 0 : 3),
+		    (long)debug_breakpoint_lnum);
+	    debug_breakpoint_name = NULL;
+	    do_debug(eap->cmd);
+	}
+	else
+	{
+	    debug_skipped = TRUE;
+	    debug_skipped_name = debug_breakpoint_name;
+	    debug_breakpoint_name = NULL;
+	}
+    }
+    else if (ex_nesting_level <= debug_break_level)
+    {
+	if (!eap->skip)
+	    do_debug(eap->cmd);
+	else
+	{
+	    debug_skipped = TRUE;
+	    debug_skipped_name = NULL;
+	}
+    }
+}
+
+/*
+ * Go to debug mode if skipped by dbg_check_breakpoint() because eap->skip was
+ * set.  Return TRUE when the debug mode is entered this time.
+ */
+    int
+dbg_check_skipped(exarg_T *eap)
+{
+    int		prev_got_int;
+
+    if (debug_skipped)
+    {
+	/*
+	 * Save the value of got_int and reset it.  We don't want a previous
+	 * interruption cause flushing the input buffer.
+	 */
+	prev_got_int = got_int;
+	got_int = FALSE;
+	debug_breakpoint_name = debug_skipped_name;
+	/* eap->skip is TRUE */
+	eap->skip = FALSE;
+	(void)dbg_check_breakpoint(eap);
+	eap->skip = TRUE;
+	got_int |= prev_got_int;
+	return TRUE;
+    }
+    return FALSE;
+}
+
+/*
+ * The list of breakpoints: dbg_breakp.
+ * This is a grow-array of structs.
+ */
+struct debuggy
+{
+    int		dbg_nr;		/* breakpoint number */
+    int		dbg_type;	/* DBG_FUNC, DBG_FILE or DBG_EXPR */
+    char_u	*dbg_name;	/* function, expression or file name */
+    regprog_T	*dbg_prog;	/* regexp program */
+    linenr_T	dbg_lnum;	/* line number in function or file */
+    int		dbg_forceit;	/* ! used */
+#ifdef FEAT_EVAL
+    typval_T    *dbg_val;       /* last result of watchexpression */
+#endif
+    int		dbg_level;      /* stored nested level for expr */
+};
+
+static garray_T dbg_breakp = {0, 0, sizeof(struct debuggy), 4, NULL};
+#define BREAKP(idx)		(((struct debuggy *)dbg_breakp.ga_data)[idx])
+#define DEBUGGY(gap, idx)	(((struct debuggy *)gap->ga_data)[idx])
+static int last_breakp = 0;	/* nr of last defined breakpoint */
+
+#ifdef FEAT_PROFILE
+/* Profiling uses file and func names similar to breakpoints. */
+static garray_T prof_ga = {0, 0, sizeof(struct debuggy), 4, NULL};
+#endif
+#define DBG_FUNC	1
+#define DBG_FILE	2
+#define DBG_EXPR	3
+
+static linenr_T debuggy_find(int file,char_u *fname, linenr_T after, garray_T *gap, int *fp);
+
+/*
+ * Parse the arguments of ":profile", ":breakadd" or ":breakdel" and put them
+ * in the entry just after the last one in dbg_breakp.  Note that "dbg_name"
+ * is allocated.
+ * Returns FAIL for failure.
+ */
+    static int
+dbg_parsearg(
+    char_u	*arg,
+    garray_T	*gap)	    /* either &dbg_breakp or &prof_ga */
+{
+    char_u	*p = arg;
+    char_u	*q;
+    struct debuggy *bp;
+    int		here = FALSE;
+
+    if (ga_grow(gap, 1) == FAIL)
+	return FAIL;
+    bp = &DEBUGGY(gap, gap->ga_len);
+
+    /* Find "func" or "file". */
+    if (STRNCMP(p, "func", 4) == 0)
+	bp->dbg_type = DBG_FUNC;
+    else if (STRNCMP(p, "file", 4) == 0)
+	bp->dbg_type = DBG_FILE;
+    else if (
+#ifdef FEAT_PROFILE
+	    gap != &prof_ga &&
+#endif
+	    STRNCMP(p, "here", 4) == 0)
+    {
+	if (curbuf->b_ffname == NULL)
+	{
+	    emsg(_(e_noname));
+	    return FAIL;
+	}
+	bp->dbg_type = DBG_FILE;
+	here = TRUE;
+    }
+    else if (
+#ifdef FEAT_PROFILE
+	    gap != &prof_ga &&
+#endif
+	    STRNCMP(p, "expr", 4) == 0)
+	bp->dbg_type = DBG_EXPR;
+    else
+    {
+	semsg(_(e_invarg2), p);
+	return FAIL;
+    }
+    p = skipwhite(p + 4);
+
+    /* Find optional line number. */
+    if (here)
+	bp->dbg_lnum = curwin->w_cursor.lnum;
+    else if (
+#ifdef FEAT_PROFILE
+	    gap != &prof_ga &&
+#endif
+	    VIM_ISDIGIT(*p))
+    {
+	bp->dbg_lnum = getdigits(&p);
+	p = skipwhite(p);
+    }
+    else
+	bp->dbg_lnum = 0;
+
+    /* Find the function or file name.  Don't accept a function name with (). */
+    if ((!here && *p == NUL)
+	    || (here && *p != NUL)
+	    || (bp->dbg_type == DBG_FUNC && strstr((char *)p, "()") != NULL))
+    {
+	semsg(_(e_invarg2), arg);
+	return FAIL;
+    }
+
+    if (bp->dbg_type == DBG_FUNC)
+	bp->dbg_name = vim_strsave(p);
+    else if (here)
+	bp->dbg_name = vim_strsave(curbuf->b_ffname);
+    else if (bp->dbg_type == DBG_EXPR)
+    {
+	bp->dbg_name = vim_strsave(p);
+	if (bp->dbg_name != NULL)
+	    bp->dbg_val = eval_expr(bp->dbg_name, NULL);
+    }
+    else
+    {
+	/* Expand the file name in the same way as do_source().  This means
+	 * doing it twice, so that $DIR/file gets expanded when $DIR is
+	 * "~/dir". */
+	q = expand_env_save(p);
+	if (q == NULL)
+	    return FAIL;
+	p = expand_env_save(q);
+	vim_free(q);
+	if (p == NULL)
+	    return FAIL;
+	if (*p != '*')
+	{
+	    bp->dbg_name = fix_fname(p);
+	    vim_free(p);
+	}
+	else
+	    bp->dbg_name = p;
+    }
+
+    if (bp->dbg_name == NULL)
+	return FAIL;
+    return OK;
+}
+
+/*
+ * ":breakadd".  Also used for ":profile".
+ */
+    void
+ex_breakadd(exarg_T *eap)
+{
+    struct debuggy *bp;
+    char_u	*pat;
+    garray_T	*gap;
+
+    gap = &dbg_breakp;
+#ifdef FEAT_PROFILE
+    if (eap->cmdidx == CMD_profile)
+	gap = &prof_ga;
+#endif
+
+    if (dbg_parsearg(eap->arg, gap) == OK)
+    {
+	bp = &DEBUGGY(gap, gap->ga_len);
+	bp->dbg_forceit = eap->forceit;
+
+	if (bp->dbg_type != DBG_EXPR)
+	{
+	    pat = file_pat_to_reg_pat(bp->dbg_name, NULL, NULL, FALSE);
+	    if (pat != NULL)
+	    {
+		bp->dbg_prog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
+		vim_free(pat);
+	    }
+	    if (pat == NULL || bp->dbg_prog == NULL)
+		vim_free(bp->dbg_name);
+	    else
+	    {
+		if (bp->dbg_lnum == 0)	/* default line number is 1 */
+		    bp->dbg_lnum = 1;
+#ifdef FEAT_PROFILE
+		if (eap->cmdidx != CMD_profile)
+#endif
+		{
+		    DEBUGGY(gap, gap->ga_len).dbg_nr = ++last_breakp;
+		    ++debug_tick;
+		}
+		++gap->ga_len;
+	    }
+	}
+	else
+	{
+	    /* DBG_EXPR */
+	    DEBUGGY(gap, gap->ga_len++).dbg_nr = ++last_breakp;
+	    ++debug_tick;
+	}
+    }
+}
+
+/*
+ * ":debuggreedy".
+ */
+    void
+ex_debuggreedy(exarg_T *eap)
+{
+    if (eap->addr_count == 0 || eap->line2 != 0)
+	debug_greedy = TRUE;
+    else
+	debug_greedy = FALSE;
+}
+
+/*
+ * ":breakdel" and ":profdel".
+ */
+    void
+ex_breakdel(exarg_T *eap)
+{
+    struct debuggy *bp, *bpi;
+    int		nr;
+    int		todel = -1;
+    int		del_all = FALSE;
+    int		i;
+    linenr_T	best_lnum = 0;
+    garray_T	*gap;
+
+    gap = &dbg_breakp;
+    if (eap->cmdidx == CMD_profdel)
+    {
+#ifdef FEAT_PROFILE
+	gap = &prof_ga;
+#else
+	ex_ni(eap);
+	return;
+#endif
+    }
+
+    if (vim_isdigit(*eap->arg))
+    {
+	/* ":breakdel {nr}" */
+	nr = atol((char *)eap->arg);
+	for (i = 0; i < gap->ga_len; ++i)
+	    if (DEBUGGY(gap, i).dbg_nr == nr)
+	    {
+		todel = i;
+		break;
+	    }
+    }
+    else if (*eap->arg == '*')
+    {
+	todel = 0;
+	del_all = TRUE;
+    }
+    else
+    {
+	/* ":breakdel {func|file|expr} [lnum] {name}" */
+	if (dbg_parsearg(eap->arg, gap) == FAIL)
+	    return;
+	bp = &DEBUGGY(gap, gap->ga_len);
+	for (i = 0; i < gap->ga_len; ++i)
+	{
+	    bpi = &DEBUGGY(gap, i);
+	    if (bp->dbg_type == bpi->dbg_type
+		    && STRCMP(bp->dbg_name, bpi->dbg_name) == 0
+		    && (bp->dbg_lnum == bpi->dbg_lnum
+			|| (bp->dbg_lnum == 0
+			    && (best_lnum == 0
+				|| bpi->dbg_lnum < best_lnum))))
+	    {
+		todel = i;
+		best_lnum = bpi->dbg_lnum;
+	    }
+	}
+	vim_free(bp->dbg_name);
+    }
+
+    if (todel < 0)
+	semsg(_("E161: Breakpoint not found: %s"), eap->arg);
+    else
+    {
+	while (gap->ga_len > 0)
+	{
+	    vim_free(DEBUGGY(gap, todel).dbg_name);
+#ifdef FEAT_EVAL
+	    if (DEBUGGY(gap, todel).dbg_type == DBG_EXPR
+		    && DEBUGGY(gap, todel).dbg_val != NULL)
+		free_tv(DEBUGGY(gap, todel).dbg_val);
+#endif
+	    vim_regfree(DEBUGGY(gap, todel).dbg_prog);
+	    --gap->ga_len;
+	    if (todel < gap->ga_len)
+		mch_memmove(&DEBUGGY(gap, todel), &DEBUGGY(gap, todel + 1),
+			      (gap->ga_len - todel) * sizeof(struct debuggy));
+#ifdef FEAT_PROFILE
+	    if (eap->cmdidx == CMD_breakdel)
+#endif
+		++debug_tick;
+	    if (!del_all)
+		break;
+	}
+
+	/* If all breakpoints were removed clear the array. */
+	if (gap->ga_len == 0)
+	    ga_clear(gap);
+    }
+}
+
+/*
+ * ":breaklist".
+ */
+    void
+ex_breaklist(exarg_T *eap UNUSED)
+{
+    struct debuggy *bp;
+    int		i;
+
+    if (dbg_breakp.ga_len == 0)
+	msg(_("No breakpoints defined"));
+    else
+	for (i = 0; i < dbg_breakp.ga_len; ++i)
+	{
+	    bp = &BREAKP(i);
+	    if (bp->dbg_type == DBG_FILE)
+		home_replace(NULL, bp->dbg_name, NameBuff, MAXPATHL, TRUE);
+	    if (bp->dbg_type != DBG_EXPR)
+		smsg(_("%3d  %s %s  line %ld"),
+		    bp->dbg_nr,
+		    bp->dbg_type == DBG_FUNC ? "func" : "file",
+		    bp->dbg_type == DBG_FUNC ? bp->dbg_name : NameBuff,
+		    (long)bp->dbg_lnum);
+	    else
+		smsg(_("%3d  expr %s"),
+		    bp->dbg_nr, bp->dbg_name);
+	}
+}
+
+/*
+ * Find a breakpoint for a function or sourced file.
+ * Returns line number at which to break; zero when no matching breakpoint.
+ */
+    linenr_T
+dbg_find_breakpoint(
+    int		file,	    /* TRUE for a file, FALSE for a function */
+    char_u	*fname,	    /* file or function name */
+    linenr_T	after)	    /* after this line number */
+{
+    return debuggy_find(file, fname, after, &dbg_breakp, NULL);
+}
+
+#if defined(FEAT_PROFILE) || defined(PROTO)
+/*
+ * Return TRUE if profiling is on for a function or sourced file.
+ */
+    int
+has_profiling(
+    int		file,	    /* TRUE for a file, FALSE for a function */
+    char_u	*fname,	    /* file or function name */
+    int		*fp)	    /* return: forceit */
+{
+    return (debuggy_find(file, fname, (linenr_T)0, &prof_ga, fp)
+							      != (linenr_T)0);
+}
+#endif
+
+/*
+ * Common code for dbg_find_breakpoint() and has_profiling().
+ */
+    static linenr_T
+debuggy_find(
+    int		file,	    /* TRUE for a file, FALSE for a function */
+    char_u	*fname,	    /* file or function name */
+    linenr_T	after,	    /* after this line number */
+    garray_T	*gap,	    /* either &dbg_breakp or &prof_ga */
+    int		*fp)	    /* if not NULL: return forceit */
+{
+    struct debuggy *bp;
+    int		i;
+    linenr_T	lnum = 0;
+    char_u	*name = fname;
+    int		prev_got_int;
+
+    /* Return quickly when there are no breakpoints. */
+    if (gap->ga_len == 0)
+	return (linenr_T)0;
+
+    /* Replace K_SNR in function name with "<SNR>". */
+    if (!file && fname[0] == K_SPECIAL)
+    {
+	name = alloc((unsigned)STRLEN(fname) + 3);
+	if (name == NULL)
+	    name = fname;
+	else
+	{
+	    STRCPY(name, "<SNR>");
+	    STRCPY(name + 5, fname + 3);
+	}
+    }
+
+    for (i = 0; i < gap->ga_len; ++i)
+    {
+	/* Skip entries that are not useful or are for a line that is beyond
+	 * an already found breakpoint. */
+	bp = &DEBUGGY(gap, i);
+	if (((bp->dbg_type == DBG_FILE) == file &&
+		bp->dbg_type != DBG_EXPR && (
+#ifdef FEAT_PROFILE
+		gap == &prof_ga ||
+#endif
+		(bp->dbg_lnum > after && (lnum == 0 || bp->dbg_lnum < lnum)))))
+	{
+	    /*
+	     * Save the value of got_int and reset it.  We don't want a
+	     * previous interruption cancel matching, only hitting CTRL-C
+	     * while matching should abort it.
+	     */
+	    prev_got_int = got_int;
+	    got_int = FALSE;
+	    if (vim_regexec_prog(&bp->dbg_prog, FALSE, name, (colnr_T)0))
+	    {
+		lnum = bp->dbg_lnum;
+		if (fp != NULL)
+		    *fp = bp->dbg_forceit;
+	    }
+	    got_int |= prev_got_int;
+	}
+#ifdef FEAT_EVAL
+	else if (bp->dbg_type == DBG_EXPR)
+	{
+	    typval_T *tv;
+	    int	      line = FALSE;
+
+	    prev_got_int = got_int;
+	    got_int = FALSE;
+
+	    tv = eval_expr(bp->dbg_name, NULL);
+	    if (tv != NULL)
+	    {
+		if (bp->dbg_val == NULL)
+		{
+		    debug_oldval = typval_tostring(NULL);
+		    bp->dbg_val = tv;
+		    debug_newval = typval_tostring(bp->dbg_val);
+		    line = TRUE;
+		}
+		else
+		{
+		    if (typval_compare(tv, bp->dbg_val, TYPE_EQUAL,
+							     TRUE, FALSE) == OK
+			    && tv->vval.v_number == FALSE)
+		    {
+			typval_T *v;
+
+			line = TRUE;
+			debug_oldval = typval_tostring(bp->dbg_val);
+			/* Need to evaluate again, typval_compare() overwrites
+			 * "tv". */
+			v = eval_expr(bp->dbg_name, NULL);
+			debug_newval = typval_tostring(v);
+			free_tv(bp->dbg_val);
+			bp->dbg_val = v;
+		    }
+		    free_tv(tv);
+		}
+	    }
+	    else if (bp->dbg_val != NULL)
+	    {
+		debug_oldval = typval_tostring(bp->dbg_val);
+		debug_newval = typval_tostring(NULL);
+		free_tv(bp->dbg_val);
+		bp->dbg_val = NULL;
+		line = TRUE;
+	    }
+
+	    if (line)
+	    {
+		lnum = after > 0 ? after : 1;
+		break;
+	    }
+
+	    got_int |= prev_got_int;
+	}
+#endif
+    }
+    if (name != fname)
+	vim_free(name);
+
+    return lnum;
+}
+
+/*
+ * Called when a breakpoint was encountered.
+ */
+    void
+dbg_breakpoint(char_u *name, linenr_T lnum)
+{
+    /* We need to check if this line is actually executed in do_one_cmd() */
+    debug_breakpoint_name = name;
+    debug_breakpoint_lnum = lnum;
+}
+#endif