1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* 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.
*/
#include "wasm-common.h"
#include <assert.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#if COMPILER_IS_MSVC
#include <fcntl.h>
#include <io.h>
#endif
#include "wasm-allocator.h"
#define V(rtype, type1, type2, mem_size, code, NAME, text) \
[code] = {text, WASM_TYPE_##rtype, WASM_TYPE_##type1, WASM_TYPE_##type2, \
mem_size},
WasmOpcodeInfo g_wasm_opcode_info[] = {WASM_FOREACH_OPCODE(V)};
#undef V
const char* g_wasm_kind_name[] = {"func", "table", "memory", "global"};
WASM_STATIC_ASSERT(WASM_ARRAY_SIZE(g_wasm_kind_name) ==
WASM_NUM_EXTERNAL_KINDS);
WasmBool wasm_is_naturally_aligned(WasmOpcode opcode, uint32_t alignment) {
uint32_t opcode_align = wasm_get_opcode_memory_size(opcode);
return alignment == WASM_USE_NATURAL_ALIGNMENT || alignment == opcode_align;
}
uint32_t wasm_get_opcode_alignment(WasmOpcode opcode, uint32_t alignment) {
if (alignment == WASM_USE_NATURAL_ALIGNMENT)
return wasm_get_opcode_memory_size(opcode);
return alignment;
}
WasmStringSlice wasm_empty_string_slice(void) {
WasmStringSlice result;
result.start = "";
result.length = 0;
return result;
}
WasmStringSlice wasm_string_slice_from_cstr(const char* string) {
WasmStringSlice result;
result.start = string;
result.length = strlen(string);
return result;
}
WasmBool wasm_string_slices_are_equal(const WasmStringSlice* a,
const WasmStringSlice* b) {
return a->start && b->start && a->length == b->length &&
memcmp(a->start, b->start, a->length) == 0;
}
void wasm_destroy_string_slice(WasmAllocator* allocator, WasmStringSlice* str) {
wasm_free(allocator, (void*)str->start);
}
WasmResult wasm_read_file(WasmAllocator* allocator,
const char* filename,
void** out_data,
size_t* out_size) {
FILE* infile = fopen(filename, "rb");
if (!infile) {
fprintf(stderr, "unable to read %s\n", filename);
return WASM_ERROR;
}
if (fseek(infile, 0, SEEK_END) < 0) {
fprintf(stderr, "fseek to end failed.\n");
return WASM_ERROR;
}
long size = ftell(infile);
if (size < 0) {
fprintf(stderr, "ftell failed.\n");
return WASM_ERROR;
}
if (fseek(infile, 0, SEEK_SET) < 0) {
fprintf(stderr, "fseek to beginning failed.\n");
return WASM_ERROR;
}
void* data = wasm_alloc(allocator, size, WASM_DEFAULT_ALIGN);
if (fread(data, size, 1, infile) != 1) {
fprintf(stderr, "fread failed.\n");
return WASM_ERROR;
}
*out_data = data;
*out_size = size;
fclose(infile);
return WASM_OK;
}
static void print_carets(FILE* out,
size_t num_spaces,
size_t num_carets,
size_t max_line) {
/* print the caret */
char* carets = alloca(max_line);
memset(carets, '^', max_line);
if (num_carets > max_line - num_spaces)
num_carets = max_line - num_spaces;
/* always print at least one caret */
if (num_carets == 0)
num_carets = 1;
fprintf(out, "%*s%.*s\n", (int)num_spaces, "", (int)num_carets, carets);
}
static void print_source_error(FILE* out,
const WasmLocation* loc,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset) {
fprintf(out, "%s:%d:%d: %s\n", loc->filename, loc->line, loc->first_column,
error);
if (source_line && source_line_length > 0) {
fprintf(out, "%s\n", source_line);
size_t num_spaces = (loc->first_column - 1) - source_line_column_offset;
size_t num_carets = loc->last_column - loc->first_column;
print_carets(out, num_spaces, num_carets, source_line_length);
}
}
void wasm_default_source_error_callback(const WasmLocation* loc,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data) {
print_source_error(stderr, loc, error, source_line, source_line_length,
source_line_column_offset);
}
void wasm_default_assert_invalid_source_error_callback(
const WasmLocation* loc,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data) {
fprintf(stdout, "assert_invalid error:\n ");
print_source_error(stdout, loc, error, source_line, source_line_length,
source_line_column_offset);
}
void wasm_default_assert_malformed_source_error_callback(
const WasmLocation* loc,
const char* error,
const char* source_line,
size_t source_line_length,
size_t source_line_column_offset,
void* user_data) {
fprintf(stdout, "assert_malformed error:\n ");
print_source_error(stdout, loc, error, source_line, source_line_length,
source_line_column_offset);
}
void wasm_default_binary_error_callback(uint32_t offset,
const char* error,
void* user_data) {
if (offset == WASM_UNKNOWN_OFFSET)
fprintf(stderr, "error: %s\n", error);
else
fprintf(stderr, "error: @0x%08x: %s\n", offset, error);
}
void wasm_init_stdio() {
#if COMPILER_IS_MSVC
int result = _setmode(_fileno(stdout), _O_BINARY);
if (result == -1)
perror("Cannot set mode binary to stdout");
result = _setmode(_fileno(stderr), _O_BINARY);
if (result == -1)
perror("Cannot set mode binary to stderr");
#endif
}
|
