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|
/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WASM_COMMON_H_
#define WASM_COMMON_H_
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include "wasm-config.h"
#ifdef __cplusplus
#define WASM_EXTERN_C extern "C"
#define WASM_EXTERN_C_BEGIN extern "C" {
#define WASM_EXTERN_C_END }
#else
#define WASM_EXTERN_C
#define WASM_EXTERN_C_BEGIN
#define WASM_EXTERN_C_END
#endif
#define WASM_FATAL(...) fprintf(stderr, __VA_ARGS__), exit(1)
#define WASM_ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#define WASM_ZERO_MEMORY(var) memset((void*)&(var), 0, sizeof(var))
#define WASM_USE(x) (void)x
#define WASM_UNKNOWN_OFFSET ((uint32_t)~0)
#define WASM_PAGE_SIZE 0x10000 /* 64k */
#define WASM_MAX_PAGES 0x0ffff /* # of pages that fit in 32-bit address space */
#define PRIstringslice "%.*s"
#define WASM_PRINTF_STRING_SLICE_ARG(x) (int)((x).length), (x).start
#define WASM_DEFAULT_SNPRINTF_ALLOCA_BUFSIZE 128
#define WASM_SNPRINTF_ALLOCA(buffer, len, format) \
va_list args; \
va_list args_copy; \
va_start(args, format); \
va_copy(args_copy, args); \
char fixed_buf[WASM_DEFAULT_SNPRINTF_ALLOCA_BUFSIZE]; \
char* buffer = fixed_buf; \
size_t len = wasm_vsnprintf(fixed_buf, sizeof(fixed_buf), format, args); \
va_end(args); \
if (len + 1 > sizeof(fixed_buf)) { \
buffer = alloca(len + 1); \
len = wasm_vsnprintf(buffer, len + 1, format, args_copy); \
} \
va_end(args_copy)
struct WasmAllocator;
typedef enum WasmBool {
WASM_FALSE,
WASM_TRUE,
} WasmBool;
typedef enum WasmResult {
WASM_OK,
WASM_ERROR,
} WasmResult;
#define WASM_SUCCEEDED(x) ((x) == WASM_OK)
#define WASM_FAILED(x) ((x) == WASM_ERROR)
typedef struct WasmStringSlice {
const char* start;
size_t length;
} WasmStringSlice;
typedef struct WasmLocation {
const char* filename;
int line;
int first_column;
int last_column;
} WasmLocation;
typedef void (*WasmSourceErrorCallback)(const WasmLocation*,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data);
typedef struct WasmSourceErrorHandler {
WasmSourceErrorCallback on_error;
/* on_error will be called with with source_line trimmed to this length */
size_t source_line_max_length;
void* user_data;
} WasmSourceErrorHandler;
#define WASM_SOURCE_ERROR_HANDLER_DEFAULT \
{ wasm_default_source_error_callback, 80, NULL }
#define WASM_ASSERT_INVALID_SOURCE_ERROR_HANDLER_DEFAULT \
{ wasm_default_assert_invalid_source_error_callback, 80, NULL }
typedef void (*WasmBinaryErrorCallback)(uint32_t offset,
const char* error,
void* user_data);
typedef struct WasmBinaryErrorHandler {
WasmBinaryErrorCallback on_error;
void* user_data;
} WasmBinaryErrorHandler;
#define WASM_BINARY_ERROR_HANDLER_DEFAULT \
{ wasm_default_binary_error_callback, NULL }
/* matches binary format, do not change */
enum {
WASM_TYPE_VOID,
WASM_TYPE_I32,
WASM_TYPE_I64,
WASM_TYPE_F32,
WASM_TYPE_F64,
WASM_NUM_TYPES,
WASM_TYPE____ = WASM_TYPE_VOID, /* convenient for the opcode table below */
};
typedef unsigned char WasmType;
enum { WASM_USE_NATURAL_ALIGNMENT = 0xFFFFFFFF };
/*
* tr: result type
* t1: type of the 1st parameter
* t2: type of the 2nd parameter
* m: memory size of the operation, if any
* code: opcode
* NAME: used to generate the opcode enum
* text: a string of the opcode name in the AST format
*
* tr t1 t2 m code NAME text
* ============================ */
#define WASM_FOREACH_OPCODE(V) \
V(___, ___, ___, 0, 0x00, NOP, "nop") \
V(___, ___, ___, 0, 0x01, BLOCK, "block") \
V(___, ___, ___, 0, 0x02, LOOP, "loop") \
V(___, ___, ___, 0, 0x03, IF, "if") \
V(___, ___, ___, 0, 0x04, ELSE, "else") \
V(___, ___, ___, 0, 0x05, SELECT, "select") \
V(___, ___, ___, 0, 0x06, BR, "br") \
V(___, ___, ___, 0, 0x07, BR_IF, "br_if") \
V(___, ___, ___, 0, 0x08, BR_TABLE, "br_table") \
V(___, ___, ___, 0, 0x09, RETURN, "return") \
V(___, ___, ___, 0, 0x0a, UNREACHABLE, "unreachable") \
V(___, ___, ___, 0, 0x0f, END, "end") \
V(I32, ___, ___, 0, 0x10, I32_CONST, "i32.const") \
V(I64, ___, ___, 0, 0x11, I64_CONST, "i64.const") \
V(F64, ___, ___, 0, 0x12, F64_CONST, "f64.const") \
V(F32, ___, ___, 0, 0x13, F32_CONST, "f32.const") \
V(___, ___, ___, 0, 0x14, GET_LOCAL, "get_local") \
V(___, ___, ___, 0, 0x15, SET_LOCAL, "set_local") \
V(___, ___, ___, 0, 0x16, CALL_FUNCTION, "call") \
V(___, ___, ___, 0, 0x17, CALL_INDIRECT, "call_indirect") \
V(___, ___, ___, 0, 0x18, CALL_IMPORT, "call_import") \
V(I32, I32, ___, 1, 0x20, I32_LOAD8_S, "i32.load8_s") \
V(I32, I32, ___, 1, 0x21, I32_LOAD8_U, "i32.load8_u") \
V(I32, I32, ___, 2, 0x22, I32_LOAD16_S, "i32.load16_s") \
V(I32, I32, ___, 2, 0x23, I32_LOAD16_U, "i32.load16_u") \
V(I64, I32, ___, 1, 0x24, I64_LOAD8_S, "i64.load8_s") \
V(I64, I32, ___, 1, 0x25, I64_LOAD8_U, "i64.load8_u") \
V(I64, I32, ___, 2, 0x26, I64_LOAD16_S, "i64.load16_s") \
V(I64, I32, ___, 2, 0x27, I64_LOAD16_U, "i64.load16_u") \
V(I64, I32, ___, 4, 0x28, I64_LOAD32_S, "i64.load32_s") \
V(I64, I32, ___, 4, 0x29, I64_LOAD32_U, "i64.load32_u") \
V(I32, I32, ___, 4, 0x2a, I32_LOAD, "i32.load") \
V(I64, I32, ___, 8, 0x2b, I64_LOAD, "i64.load") \
V(F32, I32, ___, 4, 0x2c, F32_LOAD, "f32.load") \
V(F64, I32, ___, 8, 0x2d, F64_LOAD, "f64.load") \
V(I32, I32, I32, 1, 0x2e, I32_STORE8, "i32.store8") \
V(I32, I32, I32, 2, 0x2f, I32_STORE16, "i32.store16") \
V(I64, I32, I64, 1, 0x30, I64_STORE8, "i64.store8") \
V(I64, I32, I64, 2, 0x31, I64_STORE16, "i64.store16") \
V(I64, I32, I64, 4, 0x32, I64_STORE32, "i64.store32") \
V(I32, I32, I32, 4, 0x33, I32_STORE, "i32.store") \
V(I64, I32, I64, 8, 0x34, I64_STORE, "i64.store") \
V(F32, I32, F32, 4, 0x35, F32_STORE, "f32.store") \
V(F64, I32, F64, 8, 0x36, F64_STORE, "f64.store") \
V(I32, ___, ___, 0, 0x3b, CURRENT_MEMORY, "current_memory") \
V(I32, I32, ___, 0, 0x39, GROW_MEMORY, "grow_memory") \
V(I32, I32, I32, 0, 0x40, I32_ADD, "i32.add") \
V(I32, I32, I32, 0, 0x41, I32_SUB, "i32.sub") \
V(I32, I32, I32, 0, 0x42, I32_MUL, "i32.mul") \
V(I32, I32, I32, 0, 0x43, I32_DIV_S, "i32.div_s") \
V(I32, I32, I32, 0, 0x44, I32_DIV_U, "i32.div_u") \
V(I32, I32, I32, 0, 0x45, I32_REM_S, "i32.rem_s") \
V(I32, I32, I32, 0, 0x46, I32_REM_U, "i32.rem_u") \
V(I32, I32, I32, 0, 0x47, I32_AND, "i32.and") \
V(I32, I32, I32, 0, 0x48, I32_OR, "i32.or") \
V(I32, I32, I32, 0, 0x49, I32_XOR, "i32.xor") \
V(I32, I32, I32, 0, 0x4a, I32_SHL, "i32.shl") \
V(I32, I32, I32, 0, 0x4b, I32_SHR_U, "i32.shr_u") \
V(I32, I32, I32, 0, 0x4c, I32_SHR_S, "i32.shr_s") \
V(I32, I32, I32, 0, 0x4d, I32_EQ, "i32.eq") \
V(I32, I32, I32, 0, 0x4e, I32_NE, "i32.ne") \
V(I32, I32, I32, 0, 0x4f, I32_LT_S, "i32.lt_s") \
V(I32, I32, I32, 0, 0x50, I32_LE_S, "i32.le_s") \
V(I32, I32, I32, 0, 0x51, I32_LT_U, "i32.lt_u") \
V(I32, I32, I32, 0, 0x52, I32_LE_U, "i32.le_u") \
V(I32, I32, I32, 0, 0x53, I32_GT_S, "i32.gt_s") \
V(I32, I32, I32, 0, 0x54, I32_GE_S, "i32.ge_s") \
V(I32, I32, I32, 0, 0x55, I32_GT_U, "i32.gt_u") \
V(I32, I32, I32, 0, 0x56, I32_GE_U, "i32.ge_u") \
V(I32, I32, ___, 0, 0x57, I32_CLZ, "i32.clz") \
V(I32, I32, ___, 0, 0x58, I32_CTZ, "i32.ctz") \
V(I32, I32, ___, 0, 0x59, I32_POPCNT, "i32.popcnt") \
V(I32, I32, ___, 0, 0x5a, I32_EQZ, "i32.eqz") \
V(I64, I64, I64, 0, 0x5b, I64_ADD, "i64.add") \
V(I64, I64, I64, 0, 0x5c, I64_SUB, "i64.sub") \
V(I64, I64, I64, 0, 0x5d, I64_MUL, "i64.mul") \
V(I64, I64, I64, 0, 0x5e, I64_DIV_S, "i64.div_s") \
V(I64, I64, I64, 0, 0x5f, I64_DIV_U, "i64.div_u") \
V(I64, I64, I64, 0, 0x60, I64_REM_S, "i64.rem_s") \
V(I64, I64, I64, 0, 0x61, I64_REM_U, "i64.rem_u") \
V(I64, I64, I64, 0, 0x62, I64_AND, "i64.and") \
V(I64, I64, I64, 0, 0x63, I64_OR, "i64.or") \
V(I64, I64, I64, 0, 0x64, I64_XOR, "i64.xor") \
V(I64, I64, I64, 0, 0x65, I64_SHL, "i64.shl") \
V(I64, I64, I64, 0, 0x66, I64_SHR_U, "i64.shr_u") \
V(I64, I64, I64, 0, 0x67, I64_SHR_S, "i64.shr_s") \
V(I32, I64, I64, 0, 0x68, I64_EQ, "i64.eq") \
V(I32, I64, I64, 0, 0x69, I64_NE, "i64.ne") \
V(I32, I64, I64, 0, 0x6a, I64_LT_S, "i64.lt_s") \
V(I32, I64, I64, 0, 0x6b, I64_LE_S, "i64.le_s") \
V(I32, I64, I64, 0, 0x6c, I64_LT_U, "i64.lt_u") \
V(I32, I64, I64, 0, 0x6d, I64_LE_U, "i64.le_u") \
V(I32, I64, I64, 0, 0x6e, I64_GT_S, "i64.gt_s") \
V(I32, I64, I64, 0, 0x6f, I64_GE_S, "i64.ge_s") \
V(I32, I64, I64, 0, 0x70, I64_GT_U, "i64.gt_u") \
V(I32, I64, I64, 0, 0x71, I64_GE_U, "i64.ge_u") \
V(I64, I64, I64, 0, 0x72, I64_CLZ, "i64.clz") \
V(I64, I64, I64, 0, 0x73, I64_CTZ, "i64.ctz") \
V(I64, I64, I64, 0, 0x74, I64_POPCNT, "i64.popcnt") \
V(F32, F32, F32, 0, 0x75, F32_ADD, "f32.add") \
V(F32, F32, F32, 0, 0x76, F32_SUB, "f32.sub") \
V(F32, F32, F32, 0, 0x77, F32_MUL, "f32.mul") \
V(F32, F32, F32, 0, 0x78, F32_DIV, "f32.div") \
V(F32, F32, F32, 0, 0x79, F32_MIN, "f32.min") \
V(F32, F32, F32, 0, 0x7a, F32_MAX, "f32.max") \
V(F32, F32, F32, 0, 0x7b, F32_ABS, "f32.abs") \
V(F32, F32, F32, 0, 0x7c, F32_NEG, "f32.neg") \
V(F32, F32, F32, 0, 0x7d, F32_COPYSIGN, "f32.copysign") \
V(F32, F32, F32, 0, 0x7e, F32_CEIL, "f32.ceil") \
V(F32, F32, F32, 0, 0x7f, F32_FLOOR, "f32.floor") \
V(F32, F32, F32, 0, 0x80, F32_TRUNC, "f32.trunc") \
V(F32, F32, F32, 0, 0x81, F32_NEAREST, "f32.nearest") \
V(F32, F32, F32, 0, 0x82, F32_SQRT, "f32.sqrt") \
V(I32, F32, F32, 0, 0x83, F32_EQ, "f32.eq") \
V(I32, F32, F32, 0, 0x84, F32_NE, "f32.ne") \
V(I32, F32, F32, 0, 0x85, F32_LT, "f32.lt") \
V(I32, F32, F32, 0, 0x86, F32_LE, "f32.le") \
V(I32, F32, F32, 0, 0x87, F32_GT, "f32.gt") \
V(I32, F32, F32, 0, 0x88, F32_GE, "f32.ge") \
V(F64, F64, F64, 0, 0x89, F64_ADD, "f64.add") \
V(F64, F64, F64, 0, 0x8a, F64_SUB, "f64.sub") \
V(F64, F64, F64, 0, 0x8b, F64_MUL, "f64.mul") \
V(F64, F64, F64, 0, 0x8c, F64_DIV, "f64.div") \
V(F64, F64, F64, 0, 0x8d, F64_MIN, "f64.min") \
V(F64, F64, F64, 0, 0x8e, F64_MAX, "f64.max") \
V(F64, F64, F64, 0, 0x8f, F64_ABS, "f64.abs") \
V(F64, F64, F64, 0, 0x90, F64_NEG, "f64.neg") \
V(F64, F64, F64, 0, 0x91, F64_COPYSIGN, "f64.copysign") \
V(F64, F64, F64, 0, 0x92, F64_CEIL, "f64.ceil") \
V(F64, F64, F64, 0, 0x93, F64_FLOOR, "f64.floor") \
V(F64, F64, F64, 0, 0x94, F64_TRUNC, "f64.trunc") \
V(F64, F64, F64, 0, 0x95, F64_NEAREST, "f64.nearest") \
V(F64, F64, F64, 0, 0x96, F64_SQRT, "f64.sqrt") \
V(I32, F64, F64, 0, 0x97, F64_EQ, "f64.eq") \
V(I32, F64, F64, 0, 0x98, F64_NE, "f64.ne") \
V(I32, F64, F64, 0, 0x99, F64_LT, "f64.lt") \
V(I32, F64, F64, 0, 0x9a, F64_LE, "f64.le") \
V(I32, F64, F64, 0, 0x9b, F64_GT, "f64.gt") \
V(I32, F64, F64, 0, 0x9c, F64_GE, "f64.ge") \
V(I32, F32, ___, 0, 0x9d, I32_TRUNC_S_F32, "i32.trunc_s/f32") \
V(I32, F64, ___, 0, 0x9e, I32_TRUNC_S_F64, "i32.trunc_s/f64") \
V(I32, F32, ___, 0, 0x9f, I32_TRUNC_U_F32, "i32.trunc_u/f32") \
V(I32, F64, ___, 0, 0xa0, I32_TRUNC_U_F64, "i32.trunc_u/f64") \
V(I32, I64, ___, 0, 0xa1, I32_WRAP_I64, "i32.wrap/i64") \
V(I64, F32, ___, 0, 0xa2, I64_TRUNC_S_F32, "i64.trunc_s/f32") \
V(I64, F64, ___, 0, 0xa3, I64_TRUNC_S_F64, "i64.trunc_s/f64") \
V(I64, F32, ___, 0, 0xa4, I64_TRUNC_U_F32, "i64.trunc_u/f32") \
V(I64, F64, ___, 0, 0xa5, I64_TRUNC_U_F64, "i64.trunc_u/f64") \
V(I64, I32, ___, 0, 0xa6, I64_EXTEND_S_I32, "i64.extend_s/i32") \
V(I64, I32, ___, 0, 0xa7, I64_EXTEND_U_I32, "i64.extend_u/i32") \
V(F32, I32, ___, 0, 0xa8, F32_CONVERT_S_I32, "f32.convert_s/i32") \
V(F32, I32, ___, 0, 0xa9, F32_CONVERT_U_I32, "f32.convert_u/i32") \
V(F32, I64, ___, 0, 0xaa, F32_CONVERT_S_I64, "f32.convert_s/i64") \
V(F32, I64, ___, 0, 0xab, F32_CONVERT_U_I64, "f32.convert_u/i64") \
V(F32, F64, ___, 0, 0xac, F32_DEMOTE_F64, "f32.demote/f64") \
V(F32, I32, ___, 0, 0xad, F32_REINTERPRET_I32, "f32.reinterpret/i32") \
V(F64, I32, ___, 0, 0xae, F64_CONVERT_S_I32, "f64.convert_s/i32") \
V(F64, I32, ___, 0, 0xaf, F64_CONVERT_U_I32, "f64.convert_u/i32") \
V(F64, I64, ___, 0, 0xb0, F64_CONVERT_S_I64, "f64.convert_s/i64") \
V(F64, I64, ___, 0, 0xb1, F64_CONVERT_U_I64, "f64.convert_u/i64") \
V(F64, F32, ___, 0, 0xb2, F64_PROMOTE_F32, "f64.promote/f32") \
V(F64, I64, ___, 0, 0xb3, F64_REINTERPRET_I64, "f64.reinterpret/i64") \
V(I32, F32, ___, 0, 0xb4, I32_REINTERPRET_F32, "i32.reinterpret/f32") \
V(I64, F64, ___, 0, 0xb5, I64_REINTERPRET_F64, "i64.reinterpret/f64") \
V(I32, I32, I32, 0, 0xb6, I32_ROTR, "i32.rotr") \
V(I32, I32, I32, 0, 0xb7, I32_ROTL, "i32.rotl") \
V(I64, I64, I64, 0, 0xb8, I64_ROTR, "i64.rotr") \
V(I64, I64, I64, 0, 0xb9, I64_ROTL, "i64.rotl") \
V(I32, I64, ___, 0, 0xba, I64_EQZ, "i64.eqz")
typedef enum WasmOpcode {
#define V(rtype, type1, type2, mem_size, code, NAME, text) \
WASM_OPCODE_##NAME = code,
WASM_FOREACH_OPCODE(V)
#undef V
WASM_LAST_OPCODE
} WasmOpcode;
typedef enum WasmLiteralType {
WASM_LITERAL_TYPE_INT,
WASM_LITERAL_TYPE_FLOAT,
WASM_LITERAL_TYPE_HEXFLOAT,
WASM_LITERAL_TYPE_INFINITY,
WASM_LITERAL_TYPE_NAN,
} WasmLiteralType;
typedef struct WasmLiteral {
WasmLiteralType type;
WasmStringSlice text;
} WasmLiteral;
WASM_EXTERN_C_BEGIN
/* return 1 if |alignment| matches the alignment of |opcode|, or if |alignment|
* is WASM_USE_NATURAL_ALIGNMENT */
WasmBool wasm_is_naturally_aligned(WasmOpcode opcode, uint32_t alignment);
/* if |alignment| is WASM_USE_NATURAL_ALIGNMENT, return the alignment of
* |opcode|, else return |alignment| */
uint32_t wasm_get_opcode_alignment(WasmOpcode opcode, uint32_t alignment);
WasmBool wasm_string_slices_are_equal(const WasmStringSlice*,
const WasmStringSlice*);
void wasm_destroy_string_slice(struct WasmAllocator*, WasmStringSlice*);
WasmResult wasm_read_file(struct WasmAllocator* allocator,
const char* filename,
void** out_data,
size_t* out_size);
void wasm_default_source_error_callback(const WasmLocation*,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data);
void wasm_default_assert_invalid_source_error_callback(
const WasmLocation*,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data);
void wasm_default_binary_error_callback(uint32_t offset,
const char* error,
void* user_data);
void wasm_init_stdio();
WASM_EXTERN_C_END
#endif /* WASM_COMMON_H_ */
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