File: //home/ubuntu/neovim/src/nvim/debugger.c
/// @file debugger.c
///
/// Vim script debugger functions
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "nvim/ascii_defs.h"
#include "nvim/buffer_defs.h"
#include "nvim/charset.h"
#include "nvim/cmdexpand_defs.h"
#include "nvim/debugger.h"
#include "nvim/drawscreen.h"
#include "nvim/errors.h"
#include "nvim/eval.h"
#include "nvim/eval/typval.h"
#include "nvim/eval/typval_defs.h"
#include "nvim/ex_cmds_defs.h"
#include "nvim/ex_docmd.h"
#include "nvim/ex_getln.h"
#include "nvim/fileio.h"
#include "nvim/garray.h"
#include "nvim/garray_defs.h"
#include "nvim/getchar.h"
#include "nvim/getchar_defs.h"
#include "nvim/gettext_defs.h"
#include "nvim/globals.h"
#include "nvim/keycodes.h"
#include "nvim/macros_defs.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/os/os.h"
#include "nvim/os/os_defs.h"
#include "nvim/path.h"
#include "nvim/pos_defs.h"
#include "nvim/regexp.h"
#include "nvim/runtime.h"
#include "nvim/runtime_defs.h"
#include "nvim/state_defs.h"
#include "nvim/types_defs.h"
#include "nvim/vim_defs.h"
/// batch mode debugging: don't save and restore typeahead.
static bool debug_greedy = false;
static char *debug_oldval = NULL; // old and newval for debug expressions
static char *debug_newval = NULL;
/// 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 or DBG_FILE or DBG_EXPR
char *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
typval_T *dbg_val; ///< last result of watchexpression
int dbg_level; ///< stored nested level for expr
};
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "debugger.c.generated.h"
#endif
/// Debug mode. Repeatedly get Ex commands, until told to continue normal
/// execution.
void do_debug(char *cmd)
{
int save_msg_scroll = msg_scroll;
int save_State = State;
int save_did_emsg = did_emsg;
const bool save_cmd_silent = cmd_silent;
int save_msg_silent = msg_silent;
int save_emsg_silent = emsg_silent;
bool save_redir_off = redir_off;
tasave_T typeaheadbuf;
bool typeahead_saved = false;
int save_ignore_script = 0;
char *cmdline = NULL;
char *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
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 = MODE_NORMAL;
debug_mode = true;
if (!debug_did_msg) {
msg(_("Entering Debug mode. Type \"cont\" to continue."), 0);
}
if (debug_oldval != NULL) {
smsg(0, _("Oldval = \"%s\""), debug_oldval);
xfree(debug_oldval);
debug_oldval = NULL;
}
if (debug_newval != NULL) {
smsg(0, _("Newval = \"%s\""), debug_newval);
xfree(debug_newval);
debug_newval = NULL;
}
char *sname = estack_sfile(ESTACK_NONE);
if (sname != NULL) {
msg(sname, 0);
}
xfree(sname);
if (SOURCING_LNUM != 0) {
smsg(0, _("line %" PRId64 ": %s"), (int64_t)SOURCING_LNUM, cmd);
} else {
smsg(0, _("cmd: %s"), cmd);
}
// Repeat getting a command and executing it.
while (true) {
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.
int 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;
}
// don't debug any function call, e.g. from an expression mapping
int n = debug_break_level;
debug_break_level = -1;
xfree(cmdline);
cmdline = getcmdline_prompt('>', NULL, 0, EXPAND_NOTHING, NULL,
CALLBACK_NONE);
debug_break_level = n;
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: decide 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;
do_cmdline(cmdline, getexline, NULL, DOCMD_VERBOSE|DOCMD_EXCRESET);
debug_break_level = n;
}
lines_left = Rows - 1;
}
xfree(cmdline);
RedrawingDisabled--;
no_wait_return--;
redraw_all_later(UPD_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(char *sname)
{
int maxbacktrace = 0;
if (sname == NULL) {
return 0;
}
char *p = sname;
char *q;
while ((q = strstr(p, "..")) != NULL) {
p = q + 2;
maxbacktrace++;
}
return maxbacktrace;
}
static void do_setdebugtracelevel(char *arg)
{
int level = atoi(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"), 0);
} else {
char *sname = estack_sfile(ESTACK_NONE);
int max = get_maxbacktrace_level(sname);
if (debug_backtrace_level > max) {
debug_backtrace_level = max;
smsg(0, _("frame at highest level: %d"), max);
}
xfree(sname);
}
}
static void do_showbacktrace(char *cmd)
{
char *sname = estack_sfile(ESTACK_NONE);
int max = get_maxbacktrace_level(sname);
if (sname != NULL) {
int i = 0;
char *cur = sname;
while (!got_int) {
char *next = strstr(cur, "..");
if (next != NULL) {
*next = NUL;
}
if (i == max - debug_backtrace_level) {
smsg(0, "->%d %s", max - i, cur);
} else {
smsg(0, " %d %s", max - i, cur);
}
i++;
if (next == NULL) {
break;
}
*next = '.';
cur = next + 2;
}
xfree(sname);
}
if (SOURCING_LNUM != 0) {
smsg(0, _("line %" PRId64 ": %s"), (int64_t)SOURCING_LNUM, cmd);
} else {
smsg(0, _("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 *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 bool debug_skipped;
static char *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)
{
debug_skipped = false;
if (debug_breakpoint_name != NULL) {
if (!eap->skip) {
char *p;
// replace K_SNR with "<SNR>"
if ((uint8_t)debug_breakpoint_name[0] == K_SPECIAL
&& (uint8_t)debug_breakpoint_name[1] == KS_EXTRA
&& debug_breakpoint_name[2] == KE_SNR) {
p = "<SNR>";
} else {
p = "";
}
smsg(0, _("Breakpoint in \"%s%s\" line %" PRId64),
p,
debug_breakpoint_name + (*p == NUL ? 0 : 3),
(int64_t)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.
bool dbg_check_skipped(exarg_T *eap)
{
if (!debug_skipped) {
return false;
}
// Save the value of got_int and reset it. We don't want a previous
// interruption cause flushing the input buffer.
bool prev_got_int = got_int;
got_int = false;
debug_breakpoint_name = debug_skipped_name;
// eap->skip is true
eap->skip = false;
dbg_check_breakpoint(eap);
eap->skip = true;
got_int |= prev_got_int;
return true;
}
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
static bool has_expr_breakpoint = false;
// Profiling uses file and func names similar to breakpoints.
static garray_T prof_ga = { 0, 0, sizeof(struct debuggy), 4, NULL };
#define DBG_FUNC 1
#define DBG_FILE 2
#define DBG_EXPR 3
/// Evaluate the "bp->dbg_name" expression and return the result.
/// Disables error messages.
static typval_T *eval_expr_no_emsg(struct debuggy *const bp)
FUNC_ATTR_NONNULL_ALL
{
// Disable error messages, a bad expression would make Vim unusable.
emsg_off++;
typval_T *const tv = eval_expr(bp->dbg_name, NULL);
emsg_off--;
return tv;
}
/// 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.
///
/// @param arg
/// @param gap either &dbg_breakp or &prof_ga
static int dbg_parsearg(char *arg, garray_T *gap)
{
char *p = arg;
bool here = false;
ga_grow(gap, 1);
struct debuggy *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 (gap != &prof_ga && strncmp(p, "here", 4) == 0) {
if (curbuf->b_ffname == NULL) {
emsg(_(e_noname));
return FAIL;
}
bp->dbg_type = DBG_FILE;
here = true;
} else if (gap != &prof_ga && 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 (gap != &prof_ga && ascii_isdigit(*p)) {
bp->dbg_lnum = getdigits_int32(&p, true, 0);
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(p, "()") != NULL)) {
semsg(_(e_invarg2), arg);
return FAIL;
}
if (bp->dbg_type == DBG_FUNC) {
bp->dbg_name = xstrdup(strncmp(p, "g:", 2) == 0 ? p + 2 : p);
} else if (here) {
bp->dbg_name = xstrdup(curbuf->b_ffname);
} else if (bp->dbg_type == DBG_EXPR) {
bp->dbg_name = xstrdup(p);
bp->dbg_val = eval_expr_no_emsg(bp);
} 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".
char *q = expand_env_save(p);
if (q == NULL) {
return FAIL;
}
p = expand_env_save(q);
xfree(q);
if (p == NULL) {
return FAIL;
}
if (*p != '*') {
bp->dbg_name = fix_fname(p);
xfree(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)
{
garray_T *gap = &dbg_breakp;
if (eap->cmdidx == CMD_profile) {
gap = &prof_ga;
}
if (dbg_parsearg(eap->arg, gap) != OK) {
return;
}
struct debuggy *bp = &DEBUGGY(gap, gap->ga_len);
bp->dbg_forceit = eap->forceit;
if (bp->dbg_type != DBG_EXPR) {
char *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);
xfree(pat);
}
if (pat == NULL || bp->dbg_prog == NULL) {
xfree(bp->dbg_name);
} else {
if (bp->dbg_lnum == 0) { // default line number is 1
bp->dbg_lnum = 1;
}
if (eap->cmdidx != CMD_profile) {
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++;
if (gap == &dbg_breakp) {
has_expr_breakpoint = true;
}
}
}
/// ":debuggreedy".
void ex_debuggreedy(exarg_T *eap)
{
if (eap->addr_count == 0 || eap->line2 != 0) {
debug_greedy = true;
} else {
debug_greedy = false;
}
}
static void update_has_expr_breakpoint(void)
{
has_expr_breakpoint = false;
for (int i = 0; i < dbg_breakp.ga_len; i++) {
if (BREAKP(i).dbg_type == DBG_EXPR) {
has_expr_breakpoint = true;
break;
}
}
}
/// ":breakdel" and ":profdel".
void ex_breakdel(exarg_T *eap)
{
int todel = -1;
bool del_all = false;
linenr_T best_lnum = 0;
garray_T *gap = &dbg_breakp;
if (eap->cmdidx == CMD_profdel) {
gap = &prof_ga;
}
if (ascii_isdigit(*eap->arg)) {
// ":breakdel {nr}"
int nr = atoi(eap->arg);
for (int 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;
}
struct debuggy *bp = &DEBUGGY(gap, gap->ga_len);
for (int i = 0; i < gap->ga_len; i++) {
struct debuggy *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;
}
}
xfree(bp->dbg_name);
}
if (todel < 0) {
semsg(_("E161: Breakpoint not found: %s"), eap->arg);
return;
}
while (!GA_EMPTY(gap)) {
xfree(DEBUGGY(gap, todel).dbg_name);
if (DEBUGGY(gap, todel).dbg_type == DBG_EXPR
&& DEBUGGY(gap, todel).dbg_val != NULL) {
tv_free(DEBUGGY(gap, todel).dbg_val);
}
vim_regfree(DEBUGGY(gap, todel).dbg_prog);
gap->ga_len--;
if (todel < gap->ga_len) {
memmove(&DEBUGGY(gap, todel), &DEBUGGY(gap, todel + 1),
(size_t)(gap->ga_len - todel) * sizeof(struct debuggy));
}
if (eap->cmdidx == CMD_breakdel) {
debug_tick++;
}
if (!del_all) {
break;
}
}
// If all breakpoints were removed clear the array.
if (GA_EMPTY(gap)) {
ga_clear(gap);
}
if (gap == &dbg_breakp) {
update_has_expr_breakpoint();
}
}
/// ":breaklist".
void ex_breaklist(exarg_T *eap)
{
if (GA_EMPTY(&dbg_breakp)) {
msg(_("No breakpoints defined"), 0);
return;
}
for (int i = 0; i < dbg_breakp.ga_len; i++) {
struct debuggy *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(0, _("%3d %s %s line %" PRId64),
bp->dbg_nr,
bp->dbg_type == DBG_FUNC ? "func" : "file",
bp->dbg_type == DBG_FUNC ? bp->dbg_name : NameBuff,
(int64_t)bp->dbg_lnum);
} else {
smsg(0, _("%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.
///
/// @param file true for a file, false for a function
/// @param fname file or function name
/// @param after after this line number
linenr_T dbg_find_breakpoint(bool file, char *fname, linenr_T after)
{
return debuggy_find(file, fname, after, &dbg_breakp, NULL);
}
/// @param file true for a file, false for a function
/// @param fname file or function name
/// @param fp[out] forceit
///
/// @returns true if profiling is on for a function or sourced file.
bool has_profiling(bool file, char *fname, bool *fp)
{
return debuggy_find(file, fname, 0, &prof_ga, fp)
!= 0;
}
/// Common code for dbg_find_breakpoint() and has_profiling().
///
/// @param file true for a file, false for a function
/// @param fname file or function name
/// @param after after this line number
/// @param gap either &dbg_breakp or &prof_ga
/// @param fp if not NULL: return forceit
static linenr_T debuggy_find(bool file, char *fname, linenr_T after, garray_T *gap, bool *fp)
{
struct debuggy *bp;
linenr_T lnum = 0;
char *name = fname;
// Return quickly when there are no breakpoints.
if (GA_EMPTY(gap)) {
return 0;
}
// Replace K_SNR in function name with "<SNR>".
if (!file && (uint8_t)fname[0] == K_SPECIAL) {
name = xmalloc(strlen(fname) + 3);
STRCPY(name, "<SNR>");
STRCPY(name + 5, fname + 3);
}
for (int 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
&& (gap == &prof_ga
|| (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.
bool prev_got_int = got_int;
got_int = false;
if (vim_regexec_prog(&bp->dbg_prog, false, name, 0)) {
lnum = bp->dbg_lnum;
if (fp != NULL) {
*fp = bp->dbg_forceit;
}
}
got_int |= prev_got_int;
} else if (bp->dbg_type == DBG_EXPR) {
bool line = false;
typval_T *const tv = eval_expr_no_emsg(bp);
if (tv != NULL) {
if (bp->dbg_val == NULL) {
debug_oldval = typval_tostring(NULL, true);
bp->dbg_val = tv;
debug_newval = typval_tostring(bp->dbg_val, true);
line = true;
} else {
if (typval_compare(tv, bp->dbg_val, EXPR_IS, false) == OK
&& tv->vval.v_number == false) {
line = true;
debug_oldval = typval_tostring(bp->dbg_val, true);
// Need to evaluate again, typval_compare() overwrites "tv".
typval_T *const v = eval_expr_no_emsg(bp);
debug_newval = typval_tostring(v, true);
tv_free(bp->dbg_val);
bp->dbg_val = v;
}
tv_free(tv);
}
} else if (bp->dbg_val != NULL) {
debug_oldval = typval_tostring(bp->dbg_val, true);
debug_newval = typval_tostring(NULL, true);
tv_free(bp->dbg_val);
bp->dbg_val = NULL;
line = true;
}
if (line) {
lnum = after > 0 ? after : 1;
break;
}
}
}
if (name != fname) {
xfree(name);
}
return lnum;
}
/// Called when a breakpoint was encountered.
void dbg_breakpoint(char *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;
}