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rust_builtin.cpp
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rust_builtin.cpp
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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/* Foreign builtins. */
#include "rust_sched_loop.h"
#include "rust_task.h"
#include "rust_util.h"
#include "rust_scheduler.h"
#include "sync/timer.h"
#include "sync/rust_thread.h"
#include "rust_abi.h"
#include <time.h>
#ifdef __APPLE__
#include <crt_externs.h>
#endif
#if !defined(__WIN32__)
#include <sys/time.h>
#endif
#ifdef __FreeBSD__
extern char **environ;
#endif
#ifdef __ANDROID__
time_t
timegm(struct tm *tm)
{
time_t ret;
char *tz;
tz = getenv("TZ");
setenv("TZ", "", 1);
tzset();
ret = mktime(tm);
if (tz)
setenv("TZ", tz, 1);
else
unsetenv("TZ");
tzset();
return ret;
}
#endif
#if defined(__WIN32__)
extern "C" CDECL char**
rust_env_pairs() {
return 0;
}
#else
extern "C" CDECL char**
rust_env_pairs() {
#ifdef __APPLE__
char **environ = *_NSGetEnviron();
#endif
return environ;
}
#endif
extern "C" CDECL void
vec_reserve_shared_actual(type_desc* ty, rust_vec_box** vp,
size_t n_elts) {
rust_task *task = rust_get_current_task();
reserve_vec_exact_shared(task, vp, n_elts * ty->size);
}
// This is completely misnamed.
extern "C" CDECL void
vec_reserve_shared(type_desc* ty, rust_vec_box** vp,
size_t n_elts) {
reserve_vec_exact(vp, n_elts * ty->size);
}
extern "C" CDECL size_t
rand_seed_size() {
return rng_seed_size();
}
extern "C" CDECL void
rand_gen_seed(uint8_t* dest, size_t size) {
rust_task *task = rust_get_current_task();
rng_gen_seed(task->kernel, dest, size);
}
extern "C" CDECL void *
rand_new_seeded(uint8_t* seed, size_t seed_size) {
rust_task *task = rust_get_current_task();
rust_rng *rng = (rust_rng *) task->malloc(sizeof(rust_rng),
"rand_new_seeded");
if (!rng) {
task->fail();
return NULL;
}
rng_init(task->kernel, rng, seed, seed_size);
return rng;
}
extern "C" CDECL uint32_t
rand_next(rust_rng *rng) {
rust_task *task = rust_get_current_task();
return rng_gen_u32(task->kernel, rng);
}
extern "C" CDECL void
rand_free(rust_rng *rng) {
rust_task *task = rust_get_current_task();
task->free(rng);
}
/* Debug helpers strictly to verify ABI conformance.
*
* FIXME (#2665): move these into a testcase when the testsuite
* understands how to have explicit C files included.
*/
struct quad {
uint64_t a;
uint64_t b;
uint64_t c;
uint64_t d;
};
struct floats {
double a;
uint8_t b;
double c;
};
extern "C" quad
debug_abi_1(quad q) {
quad qq = { q.c + 1,
q.d - 1,
q.a + 1,
q.b - 1 };
return qq;
}
extern "C" floats
debug_abi_2(floats f) {
floats ff = { f.c + 1.0,
0xff,
f.a - 1.0 };
return ff;
}
/* Debug builtins for std::dbg. */
static void
debug_tydesc_helper(type_desc *t)
{
rust_task *task = rust_get_current_task();
LOG(task, stdlib, " size %" PRIdPTR ", align %" PRIdPTR,
t->size, t->align);
}
extern "C" CDECL void
debug_tydesc(type_desc *t) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_tydesc");
debug_tydesc_helper(t);
}
extern "C" CDECL void
debug_opaque(type_desc *t, uint8_t *front) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_opaque");
debug_tydesc_helper(t);
// Account for alignment. `front` may not indeed be the
// front byte of the passed-in argument
if (((uintptr_t)front % t->align) != 0) {
front = (uint8_t *)align_to((uintptr_t)front, (size_t)t->align);
}
for (uintptr_t i = 0; i < t->size; ++front, ++i) {
LOG(task, stdlib, " byte %" PRIdPTR ": 0x%" PRIx8, i, *front);
}
}
extern "C" CDECL void
debug_box(type_desc *t, rust_opaque_box *box) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_box(0x%" PRIxPTR ")", box);
debug_tydesc_helper(t);
LOG(task, stdlib, " refcount %" PRIdPTR,
box->ref_count - 1); // -1 because we ref'ed for this call
uint8_t *data = (uint8_t *)box_body(box);
for (uintptr_t i = 0; i < t->size; ++i) {
LOG(task, stdlib, " byte %" PRIdPTR ": 0x%" PRIx8, i, data[i]);
}
}
struct rust_tag {
uintptr_t discriminant;
uint8_t variant[];
};
extern "C" CDECL void
debug_tag(type_desc *t, rust_tag *tag) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_tag");
debug_tydesc_helper(t);
LOG(task, stdlib, " discriminant %" PRIdPTR, tag->discriminant);
for (uintptr_t i = 0; i < t->size - sizeof(tag->discriminant); ++i)
LOG(task, stdlib, " byte %" PRIdPTR ": 0x%" PRIx8, i,
tag->variant[i]);
}
extern "C" CDECL void
debug_fn(type_desc *t, fn_env_pair *fn) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_fn");
debug_tydesc_helper(t);
LOG(task, stdlib, " fn at 0x%" PRIxPTR, fn->f);
LOG(task, stdlib, " env at 0x%" PRIxPTR, fn->env);
if (fn->env) {
LOG(task, stdlib, " refcount %" PRIdPTR, fn->env->ref_count);
}
}
extern "C" CDECL void *
debug_ptrcast(type_desc *from_ty,
type_desc *to_ty,
void *ptr) {
rust_task *task = rust_get_current_task();
LOG(task, stdlib, "debug_ptrcast from");
debug_tydesc_helper(from_ty);
LOG(task, stdlib, "to");
debug_tydesc_helper(to_ty);
return ptr;
}
extern "C" CDECL void *
debug_get_stk_seg() {
rust_task *task = rust_get_current_task();
return task->stk;
}
extern "C" CDECL char*
#if defined(__WIN32__)
rust_list_dir_val(WIN32_FIND_DATA* entry_ptr) {
return entry_ptr->cFileName;
}
#else
rust_list_dir_val(dirent* entry_ptr) {
return entry_ptr->d_name;
}
#endif
extern "C" CDECL size_t
#if defined(__WIN32__)
rust_list_dir_wfd_size() {
return sizeof(WIN32_FIND_DATAW);
}
#else
rust_list_dir_wfd_size() {
return 0;
}
#endif
extern "C" CDECL void*
#if defined(__WIN32__)
rust_list_dir_wfd_fp_buf(WIN32_FIND_DATAW* wfd) {
if(wfd == NULL) {
return 0;
}
else {
return wfd->cFileName;
}
}
#else
rust_list_dir_wfd_fp_buf(void* wfd) {
return 0;
}
#endif
extern "C" CDECL int
rust_path_is_dir(char *path) {
struct stat buf;
if (stat(path, &buf)) {
return 0;
}
return S_ISDIR(buf.st_mode);
}
extern "C" CDECL int
rust_path_exists(char *path) {
struct stat buf;
if (stat(path, &buf)) {
return 0;
}
return 1;
}
extern "C" CDECL FILE* rust_get_stdin() {return stdin;}
extern "C" CDECL FILE* rust_get_stdout() {return stdout;}
extern "C" CDECL FILE* rust_get_stderr() {return stderr;}
#if defined(__WIN32__)
extern "C" CDECL void
get_time(int64_t *sec, int32_t *nsec) {
FILETIME fileTime;
GetSystemTimeAsFileTime(&fileTime);
// A FILETIME contains a 64-bit value representing the number of
// hectonanosecond (100-nanosecond) intervals since 1601-01-01T00:00:00Z.
// http://support.microsoft.com/kb/167296/en-us
ULARGE_INTEGER ul;
ul.LowPart = fileTime.dwLowDateTime;
ul.HighPart = fileTime.dwHighDateTime;
uint64_t ns_since_1601 = ul.QuadPart / 10;
const uint64_t NANOSECONDS_FROM_1601_TO_1970 = 11644473600000000ull;
uint64_t ns_since_1970 = ns_since_1601 - NANOSECONDS_FROM_1601_TO_1970;
*sec = ns_since_1970 / 1000000;
*nsec = (ns_since_1970 % 1000000) * 1000;
}
#else
extern "C" CDECL void
get_time(int64_t *sec, int32_t *nsec) {
#ifdef __APPLE__
struct timeval tv;
gettimeofday(&tv, NULL);
*sec = tv.tv_sec;
*nsec = tv.tv_usec * 1000;
#else
timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
*sec = ts.tv_sec;
*nsec = ts.tv_nsec;
#endif
}
#endif
extern "C" CDECL void
precise_time_ns(uint64_t *ns) {
timer t;
*ns = t.time_ns();
}
struct rust_tm {
int32_t tm_sec;
int32_t tm_min;
int32_t tm_hour;
int32_t tm_mday;
int32_t tm_mon;
int32_t tm_year;
int32_t tm_wday;
int32_t tm_yday;
int32_t tm_isdst;
int32_t tm_gmtoff;
rust_str *tm_zone;
int32_t tm_nsec;
};
void rust_tm_to_tm(rust_tm* in_tm, tm* out_tm) {
memset(out_tm, 0, sizeof(tm));
out_tm->tm_sec = in_tm->tm_sec;
out_tm->tm_min = in_tm->tm_min;
out_tm->tm_hour = in_tm->tm_hour;
out_tm->tm_mday = in_tm->tm_mday;
out_tm->tm_mon = in_tm->tm_mon;
out_tm->tm_year = in_tm->tm_year;
out_tm->tm_wday = in_tm->tm_wday;
out_tm->tm_yday = in_tm->tm_yday;
out_tm->tm_isdst = in_tm->tm_isdst;
}
void tm_to_rust_tm(tm* in_tm, rust_tm* out_tm, int32_t gmtoff,
const char *zone, int32_t nsec) {
out_tm->tm_sec = in_tm->tm_sec;
out_tm->tm_min = in_tm->tm_min;
out_tm->tm_hour = in_tm->tm_hour;
out_tm->tm_mday = in_tm->tm_mday;
out_tm->tm_mon = in_tm->tm_mon;
out_tm->tm_year = in_tm->tm_year;
out_tm->tm_wday = in_tm->tm_wday;
out_tm->tm_yday = in_tm->tm_yday;
out_tm->tm_isdst = in_tm->tm_isdst;
out_tm->tm_gmtoff = gmtoff;
out_tm->tm_nsec = nsec;
if (zone != NULL) {
size_t size = strlen(zone);
reserve_vec_exact(&out_tm->tm_zone, size + 1);
memcpy(out_tm->tm_zone->body.data, zone, size);
out_tm->tm_zone->body.fill = size + 1;
out_tm->tm_zone->body.data[size] = '\0';
}
}
#if defined(__WIN32__)
#define TZSET() _tzset()
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#define GMTIME(clock, result) gmtime_s((result), (clock))
#define LOCALTIME(clock, result) localtime_s((result), (clock))
#define TIMEGM(result) _mkgmtime64(result)
#else
struct tm* GMTIME(const time_t *clock, tm *result) {
struct tm* t = gmtime(clock);
if (t == NULL || result == NULL) { return NULL; }
*result = *t;
return result;
}
struct tm* LOCALTIME(const time_t *clock, tm *result) {
struct tm* t = localtime(clock);
if (t == NULL || result == NULL) { return NULL; }
*result = *t;
return result;
}
#define TIMEGM(result) mktime((result)) - _timezone
#endif
#else
#define TZSET() tzset()
#define GMTIME(clock, result) gmtime_r((clock), (result))
#define LOCALTIME(clock, result) localtime_r((clock), (result))
#define TIMEGM(result) timegm(result)
#endif
extern "C" CDECL void
rust_tzset() {
TZSET();
}
extern "C" CDECL void
rust_gmtime(int64_t sec, int32_t nsec, rust_tm *timeptr) {
tm tm;
time_t s = sec;
GMTIME(&s, &tm);
tm_to_rust_tm(&tm, timeptr, 0, "UTC", nsec);
}
extern "C" CDECL void
rust_localtime(int64_t sec, int32_t nsec, rust_tm *timeptr) {
tm tm;
time_t s = sec;
LOCALTIME(&s, &tm);
#if defined(__WIN32__)
int32_t gmtoff = -timezone;
char zone[64];
strftime(zone, sizeof(zone), "%Z", &tm);
#else
int32_t gmtoff = tm.tm_gmtoff;
const char *zone = tm.tm_zone;
#endif
tm_to_rust_tm(&tm, timeptr, gmtoff, zone, nsec);
}
extern "C" CDECL void
rust_timegm(rust_tm* timeptr, int64_t *out) {
tm t;
rust_tm_to_tm(timeptr, &t);
*out = TIMEGM(&t);
}
extern "C" CDECL void
rust_mktime(rust_tm* timeptr, int64_t *out) {
tm t;
rust_tm_to_tm(timeptr, &t);
*out = mktime(&t);
}
extern "C" CDECL rust_sched_id
rust_get_sched_id() {
rust_task *task = rust_get_current_task();
return task->sched->get_id();
}
extern "C" CDECL uintptr_t
rust_num_threads() {
rust_task *task = rust_get_current_task();
return task->kernel->env->num_sched_threads;
}
extern "C" CDECL int
rust_get_argc() {
rust_task *task = rust_get_current_task();
return task->kernel->env->argc;
}
extern "C" CDECL char**
rust_get_argv() {
rust_task *task = rust_get_current_task();
return task->kernel->env->argv;
}
extern "C" CDECL rust_sched_id
rust_new_sched(uintptr_t threads) {
rust_task *task = rust_get_current_task();
assert(threads > 0 && "Can't create a scheduler with no threads, silly!");
return task->kernel->create_scheduler(threads);
}
extern "C" CDECL rust_task_id
get_task_id() {
rust_task *task = rust_get_current_task();
return task->id;
}
static rust_task*
new_task_common(rust_scheduler *sched, rust_task *parent) {
return sched->create_task(parent, NULL);
}
extern "C" CDECL rust_task*
new_task() {
rust_task *task = rust_get_current_task();
rust_sched_id sched_id = task->kernel->main_sched_id();
rust_scheduler *sched = task->kernel->get_scheduler_by_id(sched_id);
assert(sched != NULL && "should always have a main scheduler");
return new_task_common(sched, task);
}
extern "C" CDECL rust_task*
rust_new_task_in_sched(rust_sched_id id) {
rust_task *task = rust_get_current_task();
rust_scheduler *sched = task->kernel->get_scheduler_by_id(id);
if (sched == NULL)
return NULL;
return new_task_common(sched, task);
}
extern "C" rust_task *
rust_get_task() {
return rust_get_current_task();
}
extern "C" rust_task *
rust_try_get_task() {
return rust_try_get_current_task();
}
extern "C" CDECL stk_seg *
rust_get_stack_segment() {
return rust_get_current_task()->stk;
}
extern "C" CDECL stk_seg *
rust_get_c_stack() {
return rust_get_current_task()->get_c_stack();
}
extern "C" CDECL void
start_task(rust_task *target, fn_env_pair *f) {
target->start(f->f, f->env, NULL);
}
extern "C" CDECL size_t
rust_sched_current_nonlazy_threads() {
rust_task *task = rust_get_current_task();
return task->sched->number_of_threads();
}
extern "C" CDECL size_t
rust_sched_threads() {
rust_task *task = rust_get_current_task();
return task->sched->max_number_of_threads();
}
// This is called by an intrinsic on the Rust stack and must run
// entirely in the red zone. Do not call on the C stack.
extern "C" CDECL MUST_CHECK bool
rust_task_yield(rust_task *task, bool *killed) {
return task->yield();
}
extern "C" CDECL void
rust_set_exit_status(intptr_t code) {
rust_task *task = rust_get_current_task();
task->kernel->set_exit_status((int)code);
}
extern void log_console_on();
extern "C" CDECL void
rust_log_console_on() {
log_console_on();
}
extern void log_console_off(rust_env *env);
extern "C" CDECL void
rust_log_console_off() {
rust_task *task = rust_get_current_task();
log_console_off(task->kernel->env);
}
extern "C" CDECL void
rust_dbg_breakpoint() {
BREAKPOINT_AWESOME;
}
extern "C" CDECL rust_sched_id
rust_osmain_sched_id() {
rust_task *task = rust_get_current_task();
return task->kernel->osmain_sched_id();
}
extern "C" void
rust_task_inhibit_kill(rust_task *task) {
task->inhibit_kill();
}
extern "C" void
rust_task_allow_kill(rust_task *task) {
task->allow_kill();
}
extern "C" void
rust_task_inhibit_yield(rust_task *task) {
task->inhibit_yield();
}
extern "C" void
rust_task_allow_yield(rust_task *task) {
task->allow_yield();
}
extern "C" void
rust_task_kill_other(rust_task *task) { /* Used for linked failure */
task->kill();
}
extern "C" void
rust_task_kill_all(rust_task *task) { /* Used for linked failure */
task->fail_sched_loop();
// This must not happen twice.
static bool main_taskgroup_failed = false;
assert(!main_taskgroup_failed);
main_taskgroup_failed = true;
}
extern "C" CDECL
bool rust_task_is_unwinding(rust_task *rt) {
return rt->unwinding;
}
extern "C" lock_and_signal*
rust_create_little_lock() {
return new lock_and_signal();
}
extern "C" void
rust_destroy_little_lock(lock_and_signal *lock) {
delete lock;
}
extern "C" void
rust_lock_little_lock(lock_and_signal *lock) {
lock->lock();
}
extern "C" void
rust_unlock_little_lock(lock_and_signal *lock) {
lock->unlock();
}
// set/get/atexit task_local_data can run on the rust stack for speed.
extern "C" void *
rust_get_task_local_data(rust_task *task) {
return task->task_local_data;
}
extern "C" void
rust_set_task_local_data(rust_task *task, void *data) {
task->task_local_data = data;
}
extern "C" void
rust_task_local_data_atexit(rust_task *task, void (*cleanup_fn)(void *data)) {
task->task_local_data_cleanup = cleanup_fn;
}
extern "C" void
task_clear_event_reject(rust_task *task) {
task->clear_event_reject();
}
// Waits on an event, returning the pointer to the event that unblocked this
// task.
extern "C" MUST_CHECK bool
task_wait_event(rust_task *task, void **result) {
// Maybe (if not too slow) assert that the passed in task is the currently
// running task. We wouldn't want to wait some other task.
return task->wait_event(result);
}
extern "C" void
task_signal_event(rust_task *target, void *event) {
target->signal_event(event);
}
// Can safely run on the rust stack.
extern "C" void
rust_task_ref(rust_task *task) {
task->ref();
}
// Don't run on the rust stack!
extern "C" void
rust_task_deref(rust_task *task) {
task->deref();
}
// Must call on rust stack.
extern "C" CDECL void
rust_call_tydesc_glue(void *root, size_t *tydesc, size_t glue_index) {
void (*glue_fn)(void *, void *, void *, void *) =
(void (*)(void *, void *, void *, void *))tydesc[glue_index];
if (glue_fn)
glue_fn(0, 0, 0, root);
}
// Don't run on the Rust stack!
extern "C" void
rust_log_str(uint32_t level, const char *str, size_t size) {
rust_task *task = rust_get_current_task();
task->sched_loop->get_log().log(task, level, "%.*s", (int)size, str);
}
extern "C" CDECL void record_sp_limit(void *limit);
class raw_thread: public rust_thread {
public:
fn_env_pair fn;
raw_thread(fn_env_pair fn) : fn(fn) { }
virtual void run() {
record_sp_limit(0);
fn.f(NULL, fn.env, NULL);
}
};
extern "C" raw_thread*
rust_raw_thread_start(fn_env_pair *fn) {
assert(fn);
raw_thread *thread = new raw_thread(*fn);
thread->start();
return thread;
}
extern "C" void
rust_raw_thread_join_delete(raw_thread *thread) {
assert(thread);
thread->join();
delete thread;
}
extern "C" void
rust_register_exit_function(spawn_fn runner, fn_env_pair *f) {
rust_task *task = rust_get_current_task();
task->kernel->register_exit_function(runner, f);
}
extern "C" void *
rust_get_global_data_ptr() {
rust_task *task = rust_get_current_task();
return &task->kernel->global_data;
}
extern "C" void
rust_inc_kernel_live_count() {
rust_task *task = rust_get_current_task();
task->kernel->inc_live_count();
}
extern "C" void
rust_dec_kernel_live_count() {
rust_task *task = rust_get_current_task();
task->kernel->dec_live_count();
}
#ifndef _WIN32
#include <sys/types.h>
#include <dirent.h>
extern "C" DIR*
rust_opendir(char *dirname) {
return opendir(dirname);
}
extern "C" dirent*
rust_readdir(DIR *dirp) {
return readdir(dirp);
}
#else
extern "C" void
rust_opendir() {
}
extern "C" void
rust_readdir() {
}
#endif
extern "C" rust_env*
rust_get_rt_env() {
rust_task *task = rust_get_current_task();
return task->kernel->env;
}
typedef void *(*nullary_fn)();
extern "C" CDECL void
rust_call_nullary_fn(nullary_fn f) {
f();
}
#ifndef _WIN32
pthread_key_t sched_key;
#else
DWORD sched_key;
#endif
extern "C" void*
rust_get_sched_tls_key() {
return &sched_key;
}
// Initialize the global state required by the new scheduler
extern "C" CDECL void
rust_initialize_global_state() {
static lock_and_signal init_lock;
static bool initialized = false;
scoped_lock with(init_lock);
if (!initialized) {
#ifndef _WIN32
assert(!pthread_key_create(&sched_key, NULL));
#else
sched_key = TlsAlloc();
assert(sched_key != TLS_OUT_OF_INDEXES);
#endif
initialized = true;
}
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
//