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229 lines
7.9 KiB
229 lines
7.9 KiB
#pragma once
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#include <sys/mman.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "client_socket.h"
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#include "panic.h"
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#include "sandbox_request.h"
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#include "memlogging.h"
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/***************************
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* Public API *
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**************************/
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struct sandbox *sandbox_allocate(struct sandbox_request *sandbox_request);
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void sandbox_free(struct sandbox *sandbox);
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void sandbox_main(struct sandbox *sandbox);
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void sandbox_switch_to(struct sandbox *next_sandbox);
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static inline void
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sandbox_close_http(struct sandbox *sandbox)
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{
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assert(sandbox != NULL);
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int rc = epoll_ctl(worker_thread_epoll_file_descriptor, EPOLL_CTL_DEL, sandbox->client_socket_descriptor, NULL);
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if (unlikely(rc < 0)) panic_err();
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client_socket_close(sandbox->client_socket_descriptor, &sandbox->client_address);
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}
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/**
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* Remove the client fd from epoll
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*/
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static inline void
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sandbox_remove_from_epoll(struct sandbox *sandbox)
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{
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assert(sandbox != NULL);
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int rc = epoll_ctl(worker_thread_epoll_file_descriptor, EPOLL_CTL_DEL, sandbox->client_socket_descriptor, NULL);
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if (unlikely(rc < 0)) panic_err();
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}
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/**
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* Initializes a sandbox fd ready for use with the proper preopen magic
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* @param sandbox
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* @return index of handle we preopened or -1 on error (sandbox is null or all io_handles are exhausted)
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*/
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static inline int
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sandbox_initialize_file_descriptor(struct sandbox *sandbox)
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{
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if (!sandbox) return -1;
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int sandbox_fd;
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for (sandbox_fd = 0; sandbox_fd < SANDBOX_MAX_FD_COUNT; sandbox_fd++) {
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if (sandbox->file_descriptors[sandbox_fd] < 0) break;
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}
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if (sandbox_fd == SANDBOX_MAX_FD_COUNT) return -1;
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sandbox->file_descriptors[sandbox_fd] = SANDBOX_FILE_DESCRIPTOR_PREOPEN_MAGIC;
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return sandbox_fd;
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}
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/**
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* Free Linear Memory, leaving stack in place
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* @param sandbox
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*/
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static inline void
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sandbox_free_linear_memory(struct sandbox *sandbox)
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{
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int rc = munmap(sandbox->linear_memory_start, SANDBOX_MAX_MEMORY + PAGE_SIZE);
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if (rc == -1) panic("sandbox_free_linear_memory - munmap failed\n");
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sandbox->linear_memory_start = NULL;
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}
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/**
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* Given a sandbox, returns the module that sandbox is executing
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* @param sandbox the sandbox whose module we want
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* @return the module of the provided sandbox
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*/
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static inline struct module *
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sandbox_get_module(struct sandbox *sandbox)
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{
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if (!sandbox) return NULL;
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return sandbox->module;
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}
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/**
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* Resolve a sandbox's fd to the host fd it maps to
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* @param sandbox
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* @param sandbox_fd index into the sandbox's fd table
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* @returns file descriptor or -1 in case of error
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*/
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static inline int
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sandbox_get_file_descriptor(struct sandbox *sandbox, int sandbox_fd)
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{
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if (!sandbox) return -1;
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if (sandbox_fd >= SANDBOX_MAX_FD_COUNT || sandbox_fd < 0) return -1;
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return sandbox->file_descriptors[sandbox_fd];
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}
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static inline uint64_t
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sandbox_get_priority(void *element)
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{
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struct sandbox *sandbox = (struct sandbox *)element;
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return sandbox->absolute_deadline;
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};
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/**
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* Maps a sandbox fd to an underlying host fd
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* Returns error condition if the file_descriptor to set does not contain sandbox preopen magic
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* @param sandbox
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* @param sandbox_fd index of the sandbox fd we want to set
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* @param file_descriptor the file descripter we want to set it to
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* @returns the index that was set or -1 in case of error
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*/
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static inline int
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sandbox_set_file_descriptor(struct sandbox *sandbox, int sandbox_fd, int host_fd)
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{
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if (!sandbox) return -1;
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if (sandbox_fd >= SANDBOX_MAX_FD_COUNT || sandbox_fd < 0) return -1;
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if (host_fd < 0 || sandbox->file_descriptors[sandbox_fd] != SANDBOX_FILE_DESCRIPTOR_PREOPEN_MAGIC) return -1;
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sandbox->file_descriptors[sandbox_fd] = host_fd;
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return sandbox_fd;
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}
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/**
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* Map the host stdin, stdout, stderr to the sandbox
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* @param sandbox - the sandbox on which we are initializing stdio
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*/
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static inline void
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sandbox_initialize_stdio(struct sandbox *sandbox)
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{
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int sandbox_fd, rc;
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for (int host_fd = 0; host_fd <= 2; host_fd++) {
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sandbox_fd = sandbox_initialize_file_descriptor(sandbox);
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assert(sandbox_fd == host_fd);
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rc = sandbox_set_file_descriptor(sandbox, sandbox_fd, host_fd);
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assert(rc != -1);
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}
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}
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static inline void
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sandbox_open_http(struct sandbox *sandbox)
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{
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assert(sandbox != NULL);
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http_parser_init(&sandbox->http_parser, HTTP_REQUEST);
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/* Set the sandbox as the data the http-parser has access to */
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sandbox->http_parser.data = sandbox;
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/* Freshly allocated sandbox going runnable for first time, so register client socket with epoll */
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struct epoll_event accept_evt;
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accept_evt.data.ptr = (void *)sandbox;
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accept_evt.events = EPOLLIN | EPOLLOUT | EPOLLET;
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int rc = epoll_ctl(worker_thread_epoll_file_descriptor, EPOLL_CTL_ADD, sandbox->client_socket_descriptor,
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&accept_evt);
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if (unlikely(rc < 0)) panic_err();
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}
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/**
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* Prints key performance metrics for a sandbox to runtime_sandbox_perf_log in runtime
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* This is defined by an environment variable
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* @param sandbox
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*/
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static inline void
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sandbox_print_perf(struct sandbox *sandbox)
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{
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#ifndef LOG_RUNTIME_FILE_LOG
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return;
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#endif
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/* If the log was not defined by an environment variable, early out */
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if (runtime_sandbox_perf_log == NULL) return;
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uint32_t total_time_us = sandbox->total_time / runtime_processor_speed_MHz;
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uint32_t queued_us = (sandbox->allocation_timestamp - sandbox->enqueue_timestamp)
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/ runtime_processor_speed_MHz;
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uint32_t initializing_us = sandbox->initializing_duration / runtime_processor_speed_MHz;
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uint32_t runnable_us = sandbox->runnable_duration / runtime_processor_speed_MHz;
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uint32_t running_us = sandbox->running_duration / runtime_processor_speed_MHz;
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uint32_t blocked_us = sandbox->blocked_duration / runtime_processor_speed_MHz;
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uint32_t returned_us = sandbox->returned_duration / runtime_processor_speed_MHz;
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/*
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* Assumption: A sandbox is never able to free pages. If linear memory management
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* becomes more intelligent, then peak linear memory size needs to be tracked
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* seperately from current linear memory size.
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*/
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fprintf(runtime_sandbox_perf_log, "%lu,%s():%d,%s,%u,%u,%u,%u,%u,%u,%u,%u,%u\n", sandbox->id,
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sandbox->module->name, sandbox->module->port, sandbox_state_stringify(sandbox->state),
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sandbox->module->relative_deadline_us, total_time_us, queued_us, initializing_us, runnable_us,
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running_us, blocked_us, returned_us, sandbox->linear_memory_size);
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}
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/**
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* Prints key performance metrics for a sandbox to memory in runtime
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* @param sandbox
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*/
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static inline void
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sandbox_mem_print_perf(struct sandbox *sandbox)
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{
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#ifndef LOG_RUNTIME_MEM_LOG
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return;
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#endif
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/* If the log was not defined by an environment variable, early out */
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if (runtime_sandbox_perf_log == NULL) return;
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uint32_t total_time_us = sandbox->total_time / runtime_processor_speed_MHz;
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uint32_t queued_us = (sandbox->allocation_timestamp - sandbox->enqueue_timestamp)
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/ runtime_processor_speed_MHz;
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uint32_t initializing_us = sandbox->initializing_duration / runtime_processor_speed_MHz;
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uint32_t runnable_us = sandbox->runnable_duration / runtime_processor_speed_MHz;
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uint32_t running_us = sandbox->running_duration / runtime_processor_speed_MHz;
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uint32_t blocked_us = sandbox->blocked_duration / runtime_processor_speed_MHz;
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uint32_t returned_us = sandbox->returned_duration / runtime_processor_speed_MHz;
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/*
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* Assumption: A sandbox is never able to free pages. If linear memory management
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* becomes more intelligent, then peak linear memory size needs to be tracked
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* seperately from current linear memory size.
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*/
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mem_log("%lu,%s():%d,%s,%u,%u,%u,%u,%u,%u,%u,%u,%u\n", sandbox->id,
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sandbox->module->name, sandbox->module->port, sandbox_state_stringify(sandbox->state),
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sandbox->module->relative_deadline_us, total_time_us, queued_us, initializing_us, runnable_us,
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running_us, blocked_us, returned_us, sandbox->linear_memory_size);
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}
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