メモリ セグメントの動的配列によってメイン メモリを複製する宿題の C コードを書いています。
これらのメモリ セグメントは、それ自体が uint32_ts の単なる静的配列である別のインターフェイスから取得されます。
私のメイン メモリ インターフェイスは heapmem (ヒープ メモリのように) と呼ばれ、スイッチ以来、奇妙な valgrind 読み取り/書き込みエラーが発生しています。私を噛む前に、私は調べて調査し、最後の手段としてSOに来ています。
ここにエラーがあります
==30352== Invalid write of size 8
==30352== at 0x401661: HeapMem_map (heapmem.c:84)
==30352== by 0x400E74: map (um.c:109)
==30352== by 0x4010FD: runOpcode (um.c:182)
==30352== by 0x4011A1: UM_run (um.c:209)
==30352== by 0x400A71: main (main.c:10)
==30352== Address 0x4c53b00 is 0 bytes after a block of size 16 alloc'd
==30352== at 0x4A0610C: malloc (vg_replace_malloc.c:195)
==30352== by 0x401425: HeapMem_new (heapmem.c:32)
==30352== by 0x400ABE: UM_new (um.c:31)
==30352== by 0x400A64: main (main.c:8)
==30352==
==30352== Invalid read of size 8
==30352== at 0x401787: HeapMem_put (heapmem.c:114)
==30352== by 0x400D38: sstore (um.c:90)
==30352== by 0x401090: runOpcode (um.c:167)
==30352== by 0x4011A1: UM_run (um.c:209)
==30352== by 0x400A71: main (main.c:10)
==30352== Address 0x4c53b00 is 0 bytes after a block of size 16 alloc'd
==30352== at 0x4A0610C: malloc (vg_replace_malloc.c:195)
==30352== by 0x401425: HeapMem_new (heapmem.c:32)
==30352== by 0x400ABE: UM_new (um.c:31)
==30352== by 0x400A64: main (main.c:8)
==30352==
==30352== Invalid read of size 8
==30352== at 0x401956: car_double (heapmem.c:151)
==30352== by 0x401640: HeapMem_map (heapmem.c:82)
==30352== by 0x400E74: map (um.c:109)
==30352== by 0x4010FD: runOpcode (um.c:182)
==30352== by 0x4011A1: UM_run (um.c:209)
==30352== by 0x400A71: main (main.c:10)
==30352== Address 0x4c53b00 is 0 bytes after a block of size 16 alloc'd
==30352== at 0x4A0610C: malloc (vg_replace_malloc.c:195)
==30352== by 0x401425: HeapMem_new (heapmem.c:32)
==30352== by 0x400ABE: UM_new (um.c:31)
==30352== by 0x400A64: main (main.c:8)
==30352==
==30352== Invalid read of size 8
==30352== at 0x40174A: HeapMem_get (heapmem.c:108)
==30352== by 0x400CD9: sload (um.c:86)
==30352== by 0x401079: runOpcode (um.c:164)
==30352== by 0x4011A1: UM_run (um.c:209)
==30352== by 0x400A71: main (main.c:10)
==30352== Address 0x4c7e0f0 is 0 bytes after a block of size 4,096 alloc'd
==30352== at 0x4A0610C: malloc (vg_replace_malloc.c:195)
==30352== by 0x401923: car_double (heapmem.c:148)
==30352== by 0x401640: HeapMem_map (heapmem.c:82)
==30352== by 0x400E74: map (um.c:109)
==30352== by 0x4010FD: runOpcode (um.c:182)
==30352== by 0x4011A1: UM_run (um.c:209)
==30352== by 0x400A71: main (main.c:10)
エラーが発生するコード内の関数は次のとおりです。
// Heap Memory Structure
struct T {
Stack_T SegID_stack;
MemSeg_T* HeapMem_car;
int length, highest;
};
// Create a new heap memory structure
T HeapMem_new (MemSeg_T program) {
assert (program);
T retHeap = malloc(sizeof(*retHeap));
Stack_T structStack = Stack_new ();
retHeap->length = INIT_SIZE;
retHeap->highest = 0;
MemSeg_T* structCar = malloc(INIT_SIZE * sizeof(*structCar));
// Fill the array with NULL ptrs
for (int i = 0; i < INIT_SIZE; i++) {
structCar[i] = NULL;
}
retHeap->HeapMem_car = structCar;
retHeap->SegID_stack = structStack;
// We'll be using the map function to initialize
// the heap with a program at the 0th segment.
HeapMem_map (retHeap, MemSeg_length (program));
retHeap->HeapMem_car[PROGRAM_LOC] = program;
return retHeap;
}
// Line 84
heapmem->HeapMem_car[toMap] = segment;
// Line 114
MemSeg_T segToPut = heapmem->HeapMem_car[toPut];
// Line 151
newCar[i] = heapmem->HeapMem_car[i];
// Line 108
MemSeg_T wordSeg = heapmem->HeapMem_car[toGet];
残りのコードはこちらから入手できます。