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56 lines
1.3 KiB
56 lines
1.3 KiB
5 years ago
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#ifndef SFRT_RUNTIME_H
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#define SFRT_RUNTIME_H
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#include "types.h"
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#include <uv.h>
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#include "sandbox.h"
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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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// Assumption: bounds_check < WASM_PAGE_SIZE
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INLINE char *get_memory_ptr_for_runtime(u32 offset, u32 bounds_check);
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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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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 (1) {
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// Keep bounds checking the waters over and over until we know it's safe (we find a terminating 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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INLINE char *get_function_from_table(u32 idx, u32 type_id);
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// libc/* might need to do some setup for the libc setup
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void stub_init(char *modulename, i32 offset, mod_init_libc_fn_t fn);
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void runtime_init(void);
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static inline void
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runtime_on_alloc(uv_handle_t *h, size_t suggested, uv_buf_t *buf)
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{
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buf->base = malloc(suggested);
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memset(buf->base, 0, suggested);
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buf->len = suggested;
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}
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extern __thread uv_loop_t uvio;
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static inline uv_loop_t *
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runtime_uvio(void)
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{ return &uvio; }
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#endif /* SFRT_RUNTIME_H */
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