| 1 | #include "_gen/core/runtime.asdl.h" // Cell, etc
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| 2 | #include "_gen/frontend/syntax.asdl.h"
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| 3 | #include "vendor/greatest.h"
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| 4 |
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| 5 | TEST sizeof_syntax() {
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| 6 | // 40 bytes (after merging with line_span January 2023)
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| 7 | // - Get rid of 'string val'
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| 8 | // - Replace 'int line_id' with SourceLine
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| 9 | // - Maybe recompute length on demand
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| 10 | log("sizeof(Token) = %d", sizeof(syntax_asdl::Token));
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| 11 | log("alignof(Token) = %d", alignof(syntax_asdl::Token));
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| 12 | log("alignof(Token*) = %d", alignof(syntax_asdl::Token *));
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| 13 |
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| 14 | // Reordered to be 16 bytes
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| 15 | log("sizeof(runtime_asdl::Cell) = %d", sizeof(runtime_asdl::Cell));
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| 16 |
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| 17 | // 24 bytes: std::vector
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| 18 | log("sizeof(List<int>) = %d", sizeof(List<int>));
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| 19 | log("sizeof(List<BigStr*>) = %d", sizeof(List<BigStr *>));
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| 20 |
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| 21 | log("sizeof(Slab<int>) = %d", sizeof(Slab<int>));
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| 22 | log("sizeof(Slab<BigStr*>) = %d", sizeof(Slab<BigStr *>));
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| 23 | // Right after object header
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| 24 | log("kSlabHeaderSize = %d", kSlabHeaderSize);
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| 25 |
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| 26 | // Unlike Python, this is -1, not 255!
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| 27 | int mod = -1 % 256;
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| 28 | log("mod = %d", mod);
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| 29 |
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| 30 | log("alignof(bool) = %d", alignof(bool));
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| 31 | log("alignof(int) = %d", alignof(int));
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| 32 | log("alignof(float) = %d", alignof(float));
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| 33 |
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| 34 | log("sizeof(BigStr) = %d", sizeof(BigStr));
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| 35 | log("alignof(BigStr) = %d", alignof(BigStr));
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| 36 |
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| 37 | log("sizeof(BigStr*) = %d", sizeof(BigStr *));
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| 38 | log("alignof(BigStr*) = %d", alignof(BigStr *));
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| 39 |
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| 40 | log("alignof(max_align_t) = %d", alignof(max_align_t));
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| 41 |
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| 42 | PASS();
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| 43 | }
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| 44 |
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| 45 | // Doesn't really test anything
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| 46 | TEST sizeof_core_types() {
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| 47 | log("");
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| 48 |
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| 49 | // 8 byte header
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| 50 | log("sizeof(ObjHeader) = %d", sizeof(ObjHeader));
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| 51 | // 8 + 128 possible entries
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| 52 | // log("sizeof(LayoutFixed) = %d", sizeof(LayoutFixed));
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| 53 |
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| 54 | // 24 = 4 + (4 + 4 + 4) + 8
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| 55 | // Feels like a small string optimization here would be nice.
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| 56 | log("sizeof(BigStr) = %d", sizeof(BigStr));
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| 57 | // 16 = 4 + pad4 + 8
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| 58 | log("sizeof(List) = %d", sizeof(List<int>));
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| 59 | // 32 = 4 + pad4 + 8 + 8 + 8
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| 60 | log("sizeof(Dict) = %d", sizeof(Dict<int, int>));
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| 61 |
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| 62 | #ifndef MARK_SWEEP
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| 63 | int min_obj_size = sizeof(LayoutForwarded);
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| 64 | int short_str_size = aligned(kStrHeaderSize + 1);
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| 65 |
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| 66 | log("kStrHeaderSize = %d", kStrHeaderSize);
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| 67 | log("aligned(kStrHeaderSize + 1) = %d", short_str_size);
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| 68 | log("sizeof(LayoutForwarded) = %d", min_obj_size);
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| 69 |
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| 70 | ASSERT(min_obj_size <= short_str_size);
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| 71 | #endif
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| 72 |
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| 73 | #if 0
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| 74 | char* p = static_cast<char*>(gHeap.Allocate(17));
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| 75 | char* q = static_cast<char*>(gHeap.Allocate(9));
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| 76 | log("p = %p", p);
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| 77 | log("q = %p", q);
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| 78 | #endif
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| 79 |
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| 80 | // BigStr = 16 and List = 24.
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| 81 | // Rejected ideas about slicing:
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| 82 | //
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| 83 | // - Use data[len] == '\0' as OWNING and data[len] != '\0' as a slice?
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| 84 | // It doesn't work because s[1:] would always have that problem
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| 85 | //
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| 86 | // - s->data == (void*)(s + 1)
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| 87 | // Owning string has the data RIGHT AFTER?
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| 88 | // Maybe works? but probably a bad idea because of GLOBAL BigStr instances.
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| 89 |
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| 90 | log("");
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| 91 | log("sizeof(BigStr) = %zu", sizeof(BigStr));
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| 92 | log("sizeof(List<int>) = %zu", sizeof(List<int>));
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| 93 | log("sizeof(Dict<int, BigStr*>) = %zu", sizeof(Dict<int, BigStr *>));
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| 94 | log("sizeof(Tuple2<int, int>) = %zu", sizeof(Tuple2<int, int>));
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| 95 | log("sizeof(Tuple2<BigStr*, BigStr*>) = %zu",
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| 96 | sizeof(Tuple2<BigStr *, BigStr *>));
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| 97 | log("sizeof(Tuple3<int, int, int>) = %zu", sizeof(Tuple3<int, int, int>));
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| 98 |
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| 99 | PASS();
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| 100 | }
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| 101 |
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| 102 | TEST slab_growth() {
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| 103 | // TODO: All slabs should start out at 32
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| 104 |
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| 105 | auto li = Alloc<List<int>>();
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| 106 | log("li->items_ %p", li->slab_);
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| 107 |
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| 108 | // At some point it moves
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| 109 | for (int i = 0; i < 20; ++i) {
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| 110 | li->append(42);
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| 111 | int size = 8 + (sizeof(int) * li->capacity_);
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| 112 | log("%2d. cap %2d, size %3d, li->slab_ %p", i, li->capacity_, size,
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| 113 | li->slab_);
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| 114 | }
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| 115 |
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| 116 | log("---");
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| 117 |
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| 118 | auto lp = Alloc<List<BigStr *>>();
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| 119 | log("lp->items_ %p", lp->slab_);
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| 120 |
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| 121 | // At some point it moves
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| 122 | for (int i = 0; i < 20; ++i) {
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| 123 | lp->append(kEmptyString);
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| 124 | int size = 8 + (sizeof(BigStr *) * lp->capacity_);
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| 125 | log("%2d. cap %2d, size %3d, lp->slab_ %p", i, lp->capacity_, size,
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| 126 | lp->slab_);
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| 127 | }
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| 128 |
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| 129 | PASS();
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| 130 | }
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| 131 |
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| 132 | TEST malloc_address_test() {
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| 133 | // glibc gives us blocks of 32 bytes!
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| 134 | // 1. diff = -240
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| 135 | // 2. diff = 94064
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| 136 | // 3. diff = 32
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| 137 | // 4. diff = 32
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| 138 | // 5. diff = 32
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| 139 |
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| 140 | // tcmalloc has tighter packing!
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| 141 | // 1. diff = -8
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| 142 | // 2. diff = 32
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| 143 | // 3. diff = 8
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| 144 | // 4. diff = 8
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| 145 | // 5. diff = 8
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| 146 |
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| 147 | // 2023-08: If I pass 4096, I get 4112, so 16 byte diff
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| 148 | // 2023-08: If I pass 4080, I get 4096
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| 149 |
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| 150 | // int alloc_size = 24 * 682; // 16368 is close to 16384 - 16 bytes again
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| 151 | int alloc_size = 48 * 341; // heap 2 is the same size
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| 152 |
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| 153 | // int alloc_size = 4080;
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| 154 | // int alloc_size = 1;
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| 155 |
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| 156 | char *p[20];
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| 157 | for (int i = 0; i < 20; ++i) {
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| 158 | p[i] = static_cast<char *>(malloc(alloc_size));
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| 159 | if (i != 0) {
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| 160 | char *prev = p[i - 1];
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| 161 | log("%2d. diff = %d", i, p[i] - prev);
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | for (int i = 0; i < 20; ++i) {
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| 166 | free(p[i]);
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| 167 | }
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| 168 |
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| 169 | PASS();
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| 170 | }
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| 171 |
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| 172 | GREATEST_MAIN_DEFS();
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| 173 |
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| 174 | int main(int argc, char **argv) {
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| 175 | gHeap.Init();
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| 176 |
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| 177 | GREATEST_MAIN_BEGIN();
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| 178 |
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| 179 | RUN_TEST(sizeof_syntax);
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| 180 | RUN_TEST(sizeof_core_types);
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| 181 | RUN_TEST(slab_growth);
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| 182 | RUN_TEST(malloc_address_test);
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| 183 |
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| 184 | gHeap.CleanProcessExit();
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| 185 |
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| 186 | GREATEST_MAIN_END();
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| 187 | return 0;
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| 188 | }
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