mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-12 17:27:56 +00:00
3f26dfbb31
This is a breaking change. It defines the new environment variable named _COSMO_FDS_V2 which is used for inheriting non-stdio file descriptors on execve() or posix_spawn(). No effort has been spent thus far integrating with the older variable. If a new binary launches the older ones or vice versa they'll only be able to pass stdin / stdout / stderr to each other therefore it's important that you upgrade all your cosmo binaries if you depend on this functionality. You'll be glad you did because inheritance of file descriptors is more aligned with the POSIX standard than before.
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
#ifndef COSMOPOLITAN_MAPS_H_
|
|
#define COSMOPOLITAN_MAPS_H_
|
|
#include "libc/intrin/atomic.h"
|
|
#include "libc/intrin/tree.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/thread/tls2.internal.h"
|
|
COSMOPOLITAN_C_START_
|
|
|
|
#define MAPS_RETRY ((void *)-1)
|
|
|
|
#define MAP_TREE_CONTAINER(e) TREE_CONTAINER(struct Map, tree, e)
|
|
|
|
struct Map {
|
|
char *addr; /* granule aligned */
|
|
size_t size; /* must be nonzero */
|
|
int64_t off; /* ignore for anon */
|
|
int prot; /* memory protects */
|
|
int flags; /* memory map flag */
|
|
bool iscow; /* windows nt only */
|
|
bool readonlyfile; /* windows nt only */
|
|
unsigned visited; /* checks and fork */
|
|
intptr_t hand; /* windows nt only */
|
|
union {
|
|
struct Tree tree;
|
|
struct Map *freed;
|
|
};
|
|
};
|
|
|
|
struct Maps {
|
|
struct Tree *maps;
|
|
_Atomic(uint64_t) lock;
|
|
_Atomic(struct Map *) freed;
|
|
size_t count;
|
|
size_t pages;
|
|
_Atomic(char *) pick;
|
|
struct Map stack;
|
|
struct Map guard;
|
|
};
|
|
|
|
struct AddrSize {
|
|
char *addr;
|
|
size_t size;
|
|
};
|
|
|
|
extern struct Maps __maps;
|
|
|
|
void __maps_init(void);
|
|
bool __maps_lock(void);
|
|
void __maps_check(void);
|
|
void __maps_unlock(void);
|
|
void *__maps_randaddr(void);
|
|
void *__maps_pickaddr(size_t);
|
|
void __maps_add(struct Map *);
|
|
void __maps_free(struct Map *);
|
|
void __maps_insert(struct Map *);
|
|
struct Map *__maps_alloc(void);
|
|
struct Map *__maps_floor(const char *);
|
|
void __maps_stack(char *, int, int, size_t, int, intptr_t);
|
|
int __maps_compare(const struct Tree *, const struct Tree *);
|
|
struct AddrSize __get_main_stack(void);
|
|
|
|
forceinline optimizespeed int __maps_search(const void *key,
|
|
const struct Tree *node) {
|
|
const char *addr = (const char *)key;
|
|
const struct Map *map = (const struct Map *)MAP_TREE_CONTAINER(node);
|
|
return (addr > map->addr) - (addr < map->addr);
|
|
}
|
|
|
|
static inline struct Map *__maps_next(struct Map *map) {
|
|
struct Tree *node;
|
|
if ((node = tree_next(&map->tree)))
|
|
return MAP_TREE_CONTAINER(node);
|
|
return 0;
|
|
}
|
|
|
|
static inline struct Map *__maps_first(void) {
|
|
struct Tree *node;
|
|
if ((node = tree_first(__maps.maps)))
|
|
return MAP_TREE_CONTAINER(node);
|
|
return 0;
|
|
}
|
|
|
|
COSMOPOLITAN_C_END_
|
|
#endif /* COSMOPOLITAN_MAPS_H_ */
|