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Fix function last line do not saved in pc2line table issue

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pc2line table only saves the diff between lines, so the function end
next line is needed to generate the function's last line diff, the
previous code missed it.

This patch fixed it by change the line number generate logic a bit.

This bug is found on https://github.com/koush/quickjs, an unofficial
debugger implementation, push it to the upstream.

Signed-off-by: pengyaozong <pengyaozong@xiaomi.com>
This commit is contained in:
pengyaozong 2021-11-15 11:23:09 +08:00
parent b5e62895c6
commit 53b327151c
1 changed files with 12 additions and 3 deletions
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15
quickjs.c
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@ -30831,7 +30831,7 @@ static __exception int resolve_variables(JSContext *ctx, JSFunctionDef *s)
next: ;
}
line_num = 0; /* avoid warning */
line_num = s->line_num; /* init with function start line num */
for (pos = 0; pos < bc_len; pos = pos_next) {
op = bc_buf[pos];
len = opcode_info[op].size;
@ -30967,9 +30967,18 @@ static __exception int resolve_variables(JSContext *ctx, JSFunctionDef *s)
/* remove dead code */
int line = -1;
dbuf_put(&bc_out, bc_buf + pos, len);
pos = skip_dead_code(s, bc_buf, bc_len, pos + len, &line);
if(pos + len < bc_len)
/* have dead code, remove it */
pos = skip_dead_code(s, bc_buf, bc_len, pos + len, &line);
else {
/* already arrive the function end */
pos += len;
line = line_num + 1; /* line_num is inited with function start line, line_num + 1 goes outside */
}
pos_next = pos;
if (pos < bc_len && line >= 0 && line_num != line) {
/* use <= to allow save the function next line num */
if (pos <= bc_len && line >= 0 && line_num != line) {
line_num = line;
s->line_number_size++;
dbuf_putc(&bc_out, OP_line_num);