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85 lines
2.1 KiB
85 lines
2.1 KiB
#ifndef SFRT_RUNTIME_H
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#define SFRT_RUNTIME_H
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#include <sys/epoll.h> // for epoll_create1(), epoll_ctl(), struct epoll_event
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#include <uv.h>
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#include "module.h"
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#include "sandbox.h"
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#include "types.h"
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extern int epoll_file_descriptor;
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extern struct deque_sandbox *global_deque;
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extern pthread_mutex_t global_deque_mutex;
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extern __thread uv_loop_t uvio_handle;
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void alloc_linear_memory(void);
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void expand_memory(void);
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void free_linear_memory(void *base, u32 bound, u32 max);
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INLINE char *get_function_from_table(u32 idx, u32 type_id);
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INLINE char *get_memory_ptr_for_runtime(u32 offset, u32 bounds_check);
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void initialize_runtime(void);
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void initialize_listener_thread(void);
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void stub_init(i32 offset);
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void *worker_thread_main(void *return_code);
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/**
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* TODO: ???
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* @param offset TODO: ????
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* @param bounds_check TODO: ???
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* @return TODO: ???
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**/
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static inline void *
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get_memory_ptr_void(u32 offset, u32 bounds_check)
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{
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return (void *)get_memory_ptr_for_runtime(offset, bounds_check);
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}
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/**
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* TODO: ???
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* @param offset TODO: ????
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* @return TODO: ???
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**/
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static inline char *
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get_memory_string(u32 offset)
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{
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char *naive_ptr = get_memory_ptr_for_runtime(offset, 1);
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int i = 0;
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while (true) {
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// Keep bounds checking the waters over and over until we know it's safe (we find a terminating
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// character)
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char ith_element = get_memory_ptr_for_runtime(offset, i + 1)[i];
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if (ith_element == '\0') return naive_ptr;
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i++;
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}
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}
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/**
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* Get global libuv handle
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**/
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static inline uv_loop_t *
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get_thread_libuv_handle(void)
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{
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return &uvio_handle;
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}
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/**
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* Get CPU time in cycles using the Intel instruction rdtsc
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* @return CPU time in cycles
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**/
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static unsigned long long int
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rdtsc(void)
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{
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unsigned long long int cpu_time_in_cycles = 0;
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unsigned int cycles_lo;
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unsigned int cycles_hi;
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__asm__ volatile("RDTSC" : "=a"(cycles_lo), "=d"(cycles_hi));
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cpu_time_in_cycles = (unsigned long long int)cycles_hi << 32 | cycles_lo;
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return cpu_time_in_cycles;
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}
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#endif /* SFRT_RUNTIME_H */
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