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devicescript.c
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185 lines (151 loc) · 5.4 KB
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#include "devs_internal.h"
#include "storage/jd_storage.h"
STATIC_ASSERT(sizeof(devs_img_section_t) == DEVS_SECTION_HEADER_SIZE);
STATIC_ASSERT(sizeof(devs_img_header_t) ==
DEVS_FIX_HEADER_SIZE + DEVS_SECTION_HEADER_SIZE * DEVS_NUM_IMG_SECTIONS);
STATIC_ASSERT(sizeof(devs_function_desc_t) == DEVS_FUNCTION_HEADER_SIZE);
STATIC_ASSERT(sizeof(devs_role_desc_t) == DEVS_ROLE_HEADER_SIZE);
static void setup_ctx(devs_ctx_t *ctx, const uint8_t *img) {
ctx->img.data = img;
ctx->gc = devs_gc_create();
ctx->globals = devs_try_alloc(ctx, sizeof(value_t) * ctx->img.header->num_globals);
ctx->roles = devs_try_alloc(ctx, sizeof(devs_role_t) * devs_img_num_roles(ctx->img));
ctx->fn_protos = devs_short_map_try_alloc(ctx);
if (ctx->error_code)
return;
devs_fiber_sync_now(ctx);
devs_jd_reset_packet(ctx);
devs_jd_init_roles(ctx);
if (ctx->error_code)
return;
devs_gc_set_ctx(ctx->gc, ctx);
// reference the "main" function (first function)
ctx->the_stack[0] = devs_value_from_handle(DEVS_HANDLE_TYPE_STATIC_FUNCTION, 0);
ctx->stack_top_for_gc = 1;
// run it in bg
devs_fiber_start(ctx, 0, DEVS_OPCALL_BG);
}
devs_ctx_t *devs_create_ctx(const uint8_t *img, uint32_t size, const devs_cfg_t *cfg) {
if (size < sizeof(devs_img_header_t)) {
DMESG("image too small");
return NULL;
}
int error = devs_verify(img, size);
devs_dump_versions(img);
if (error != 0)
return NULL;
devs_ctx_t *ctx = jd_alloc(sizeof(*ctx));
ctx->cfg = *cfg;
if (!jd_lstore_is_enabled()) {
ctx->flags |= DEVS_CTX_TRACE_DISABLED;
} else {
devs_trace_ev_init_t ev = {.image_hash = jd_hash_fnv1a(img, size)};
devs_trace(ctx, DEVS_TRACE_EV_INIT, &ev, sizeof(ev));
}
setup_ctx(ctx, img);
return ctx;
}
static void devs_enter(devs_ctx_t *ctx) {
JD_ASSERT((ctx->flags & DEVS_CTX_FLAG_BUSY) == 0);
ctx->flags |= DEVS_CTX_FLAG_BUSY;
}
static void devs_leave(devs_ctx_t *ctx) {
JD_ASSERT((ctx->flags & DEVS_CTX_FLAG_BUSY) != 0);
ctx->flags &= ~DEVS_CTX_FLAG_BUSY;
}
unsigned devs_error_code(devs_ctx_t *ctx, unsigned *pc) {
if (pc)
*pc = ctx->error_pc;
return ctx->error_code;
}
void devs_client_event_handler(devs_ctx_t *ctx, int event_id, void *arg0, void *arg1) {
if (!ctx)
return;
// jd_device_t *dev = arg0;
jd_device_service_t *serv = arg0;
jd_packet_t *pkt = arg1;
jd_role_t *role = arg1;
// jd_register_query_t *reg = arg1;
devs_enter(ctx);
// sync time so we get it in trace;
// devs_fiber_poke() does this anyway, so optimize it out
if (event_id != JD_CLIENT_EV_PROCESS)
devs_fiber_sync_now(ctx);
if (ctx->flags & DEVS_CTX_PENDING_RESUME) {
ctx->flags ^= DEVS_CTX_PENDING_RESUME;
if (ctx->curr_fiber) {
ctx->ignore_brk = true;
// re-process throw if needed
if (ctx->in_throw)
devs_process_throw(ctx);
if (ctx->curr_fiber) // throw might have killed the thread
devs_fiber_run(ctx->curr_fiber);
ctx->ignore_brk = false; // just in case
devs_fiber_poke(ctx);
}
}
// all bytecode execution is called from one of these event handlers
switch (event_id) {
case JD_CLIENT_EV_SERVICE_PACKET:
devs_trace(ctx, DEVS_TRACE_EV_SERVICE_PACKET, pkt, pkt->service_size + 16);
if (serv->service_class == JD_SERVICE_CLASS_TIMESERIES_AGGREGATOR &&
pkt->service_command == JD_TIMESERIES_AGGREGATOR_CMD_STORED)
jd_lstore_append(1, JD_LSTORE_TYPE_JD_FRAME, pkt, pkt->service_size + 16);
devs_jd_process_pkt(ctx, serv, pkt);
break;
case JD_CLIENT_EV_BROADCAST_PACKET:
devs_trace(ctx, DEVS_TRACE_EV_BROADCAST_PACKET, pkt, pkt->service_size + 16);
break;
case JD_CLIENT_EV_NON_SERVICE_PACKET:
devs_trace(ctx, DEVS_TRACE_EV_NON_SERVICE_PACKET, pkt, pkt->service_size + 16);
break;
case JD_CLIENT_EV_ROLE_CHANGED:
devs_jd_role_changed(ctx, role);
break;
case JD_CLIENT_EV_PROCESS:
devs_fiber_poke(ctx);
break;
}
devs_leave(ctx);
}
static void clear_ctx(devs_ctx_t *ctx) {
devs_jd_free_roles(ctx);
devs_vm_clear_breakpoints(ctx);
devs_enter(ctx);
devs_regcache_free_all(&ctx->regcache);
devs_fiber_free_all_fibers(ctx);
devs_free(ctx, ctx->globals);
devs_free(ctx, ctx->roles);
devs_gc_destroy(ctx->gc);
memset(ctx, 0, sizeof(*ctx));
}
void devs_restart(devs_ctx_t *ctx) {
const uint8_t *img = ctx->img.data;
clear_ctx(ctx);
setup_ctx(ctx, img);
}
void devs_free_ctx(devs_ctx_t *ctx) {
if (ctx) {
clear_ctx(ctx);
jd_free(ctx);
}
}
#define DEVS_TRACE_LOG_IDX 0
void devs_trace(devs_ctx_t *ctx, unsigned evtype, const void *data, unsigned data_size) {
if (!devs_trace_enabled(ctx))
return;
uint32_t n = devs_now(ctx);
if (n != ctx->_logged_now) {
ctx->_logged_now = n;
jd_lstore_append(DEVS_TRACE_LOG_IDX, DEVS_TRACE_EV_NOW, &ctx->_logged_now,
sizeof(ctx->_logged_now));
}
jd_lstore_append(DEVS_TRACE_LOG_IDX, evtype, data, data_size);
}
void devs_oom(devs_ctx_t *ctx, unsigned size) {
JD_LOG("devs: OOM (%u bytes)", (unsigned)size);
devs_panic(ctx, DEVS_PANIC_OOM);
}
void devs_free(devs_ctx_t *ctx, void *ptr) {
jd_gc_free(ctx->gc, ptr);
}