v4_cli 0.5.0

CLI tool for V4 VM bytecode deployment
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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287

#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <cstring>

#include "doctest.h"
#include "v4/arena.h"
#include "v4/errors.hpp"
#include "v4/internal/vm.h"
#include "v4/opcodes.hpp"
#include "v4/vm_api.h"

/* Helper to emit bytecode */
static void emit8(v4_u8* code, int* k, v4_u8 byte)
{
  code[(*k)++] = byte;
}

TEST_CASE("VM with arena - word registration")
{
  // Setup arena
  uint8_t arena_buffer[1024];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  // Create VM with arena
  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);
  CHECK(vm->arena == &arena);

  // Register word with name
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  int idx = vm_register_word(vm, "TEST_WORD", code, k);
  CHECK(idx == 0);

  // Check word was registered
  Word* word = vm_get_word(vm, idx);
  REQUIRE(word != nullptr);
  REQUIRE(word->name != nullptr);
  CHECK(strcmp(word->name, "TEST_WORD") == 0);

  // Check name is in arena
  size_t arena_used = v4_arena_used(&arena);
  CHECK(arena_used > 0);
  CHECK(arena_used >= strlen("TEST_WORD") + 1);

  vm_destroy(vm);
}

TEST_CASE("VM with arena - multiple words")
{
  uint8_t arena_buffer[2048];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);

  // Register multiple words
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  vm_register_word(vm, "WORD1", code, k);
  vm_register_word(vm, "WORD2", code, k);
  vm_register_word(vm, "WORD3", code, k);

  CHECK(vm->word_count == 3);

  // Check all names are present
  CHECK(strcmp(vm->words[0].name, "WORD1") == 0);
  CHECK(strcmp(vm->words[1].name, "WORD2") == 0);
  CHECK(strcmp(vm->words[2].name, "WORD3") == 0);

  // Check arena usage
  size_t expected_min = strlen("WORD1") + 1 + strlen("WORD2") + 1 + strlen("WORD3") + 1;
  CHECK(v4_arena_used(&arena) >= expected_min);

  vm_destroy(vm);
}

TEST_CASE("VM with arena - anonymous words")
{
  uint8_t arena_buffer[1024];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);

  // Register anonymous word (no name)
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  size_t arena_before = v4_arena_used(&arena);
  int idx = vm_register_word(vm, nullptr, code, k);
  size_t arena_after = v4_arena_used(&arena);

  CHECK(idx == 0);
  CHECK(vm->words[0].name == nullptr);

  // Arena should not grow for anonymous word
  CHECK(arena_before == arena_after);

  vm_destroy(vm);
}

TEST_CASE("VM with arena - reset dictionary")
{
  uint8_t arena_buffer[1024];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);

  // Register words
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  vm_register_word(vm, "WORD1", code, k);
  vm_register_word(vm, "WORD2", code, k);

  size_t arena_used = v4_arena_used(&arena);
  CHECK(arena_used > 0);

  // Reset dictionary (should not free arena memory)
  vm_reset_dictionary(vm);

  CHECK(vm->word_count == 0);
  // Arena usage should remain the same (no free)
  CHECK(v4_arena_used(&arena) == arena_used);

  vm_destroy(vm);
}

TEST_CASE("VM with arena - arena reset and reuse")
{
  uint8_t arena_buffer[1024];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);

  // Register words
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  vm_register_word(vm, "WORD1", code, k);
  vm_register_word(vm, "WORD2", code, k);

  size_t arena_used = v4_arena_used(&arena);
  CHECK(arena_used > 0);

  // Reset dictionary
  vm_reset_dictionary(vm);

  // User manually resets arena
  v4_arena_reset(&arena);
  CHECK(v4_arena_used(&arena) == 0);

  // Register new words (should reuse arena space)
  vm_register_word(vm, "NEW_WORD1", code, k);
  vm_register_word(vm, "NEW_WORD2", code, k);

  CHECK(vm->word_count == 2);
  CHECK(strcmp(vm->words[0].name, "NEW_WORD1") == 0);
  CHECK(strcmp(vm->words[1].name, "NEW_WORD2") == 0);

  vm_destroy(vm);
}

TEST_CASE("VM without arena - uses malloc")
{
  // Create VM without arena (NULL)
  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = nullptr;  // No arena

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);
  CHECK(vm->arena == nullptr);

  // Register word with name
  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  int idx = vm_register_word(vm, "MALLOC_WORD", code, k);
  CHECK(idx == 0);

  // Check word was registered
  Word* word = vm_get_word(vm, idx);
  REQUIRE(word != nullptr);
  REQUIRE(word->name != nullptr);
  CHECK(strcmp(word->name, "MALLOC_WORD") == 0);

  // Reset dictionary (should free malloc'd memory)
  vm_reset_dictionary(vm);
  CHECK(vm->word_count == 0);

  vm_destroy(vm);
  // If this test passes without memory leaks in valgrind, malloc/free works correctly
}

TEST_CASE("VM with arena - out of memory")
{
  // Very small arena
  uint8_t arena_buffer[32];
  V4Arena arena;
  v4_arena_init(&arena, arena_buffer, sizeof(arena_buffer));

  uint8_t mem[256];
  VmConfig cfg;
  cfg.mem = mem;
  cfg.mem_size = sizeof(mem);
  cfg.mmio = nullptr;
  cfg.mmio_count = 0;
  cfg.arena = &arena;

  Vm* vm = vm_create(&cfg);
  REQUIRE(vm != nullptr);

  v4_u8 code[16];
  int k = 0;
  emit8(code, &k, static_cast<v4_u8>(v4::Op::RET));

  // Register words until arena runs out
  int idx1 = vm_register_word(vm, "SHORT", code, k);
  CHECK(idx1 == 0);

  // Try to register a word with a long name that won't fit
  int idx2 =
      vm_register_word(vm, "THIS_IS_A_VERY_LONG_WORD_NAME_THAT_WILL_NOT_FIT", code, k);
  CHECK(idx2 < 0);  // Should fail (InvalidArg)

  vm_destroy(vm);
}