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do not use mrb_alloca() that keeps memory until mrb_state freed

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2013-08-26 16:33:27 +09:00
parent f18837886c
commit f3c8cf6735
1 changed files with 4 additions and 18 deletions
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src/backtrace.c
+4 -18
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@@ -31,7 +31,7 @@ static void
get_backtrace_i(mrb_state *mrb, void *stream, int level, const char *format, ...)
{
va_list ap;
mrb_value ary;
mrb_value ary, str;
int len, ai;
if (level > 0) {
@@ -42,24 +42,10 @@ get_backtrace_i(mrb_state *mrb, void *stream, int level, const char *format, ...
ary = mrb_obj_value((struct RArray*)stream);
va_start(ap, format);
len = vsnprintf(NULL, 0, format, ap);
str = mrb_str_new(mrb, 0, len);
vsnprintf(RSTRING_PTR(str), len, format, ap);
mrb_ary_push(mrb, ary, str);
va_end(ap);
if (len < MIN_BUFSIZE) {
char buf[MIN_BUFSIZE + 1];
va_start(ap, format);
vsnprintf(buf, MIN_BUFSIZE, format, ap);
va_end(ap);
mrb_ary_push(mrb, ary, mrb_str_new(mrb, buf, len));
}
else {
char *buf = (char*)mrb_alloca(mrb, len + 1);
va_start(ap, format);
vsnprintf(buf, len, format, ap);
va_end(ap);
mrb_ary_push(mrb, ary, mrb_str_new(mrb, buf, len));
}
mrb_gc_arena_restore(mrb, ai);
}