mirror/labs-bird
1
0
Fork 0
mirror of https://gitlab.labs.nic.cz/labs/bird.git synced 2024-05-11 16:54:54 +00:00
Code Releases Activity

Filter: Improve handling of stack frames in filter bytecode

Browse Source 
When f_line is done, we have to pop the stack frame. The old code just
removed nominal number of args/vars. Change it to use stored ventry value
modified by number of returned values. This allows to allocate variables
on a stack frame during execution of f_lines instead of just at start.

But we need to know the number of returned values for a f_line. It is 1
for term, 0 for cmd. Store that to f_line during linearization.
This commit is contained in:
Ondrej Zajicek (work)
2022-03-09 02:32:29 +01:00
committed by Ondrej Zajicek
parent f31f4e6eef
commit a2527ee53d
9 changed files with 26 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
filter/f-inst.h
View File

@@ -46,14 +46,15 @@ struct f_line {
uint len; /* Line length */
u8 args; /* Function: Args required */
u8 vars;
u8 results; /* Results left on stack: cmd -> 0, term -> 1 */
struct f_arg *arg_list;
struct f_line_item items[0]; /* The items themselves */
};
/* Convert the f_inst infix tree to the f_line structures */
struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count);
static inline struct f_line *f_linearize(const struct f_inst *root)
{ return f_linearize_concat(&root, 1); }
struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count, uint results);
static inline struct f_line *f_linearize(const struct f_inst *root, uint results)
{ return f_linearize_concat(&root, 1, results); }
void f_dump_line(const struct f_line *, uint indent);