| 49 | { |
| 50 | |
| 51 | inline void * |
| 52 | _alloc_raw(size_t n) |
| 53 | { |
| 54 | # ifdef JALIB_USE_MALLOC |
| 55 | return malloc(n); |
| 56 | |
| 57 | # else // ifdef JALIB_USE_MALLOC |
| 58 | |
| 59 | // #define USE_DMTCP_ALLOC_ARENA |
| 60 | # ifdef USE_DMTCP_ALLOC_ARENA |
| 61 | # ifndef __x86_64__ |
| 62 | # error "USE_DMTCP_ALLOC_ARENA can't be used with 32-bit binaries" |
| 63 | # endif // ifndef __x86_64__ |
| 64 | static void *mmapHintAddr = (void *)0x1f000000000; |
| 65 | if (n % sysconf(_SC_PAGESIZE) != 0) { |
| 66 | n = (n + sysconf(_SC_PAGESIZE) - (n % sysconf(_SC_PAGESIZE))); |
| 67 | } |
| 68 | void *p = mmap(mmapHintAddr, n, PROT_READ | PROT_WRITE, |
| 69 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
| 70 | if (p != MAP_FAILED) { |
| 71 | mmapHintAddr = p + n; |
| 72 | } |
| 73 | # else // ifdef USE_DMTCP_ALLOC_ARENA |
| 74 | void *p = |
| 75 | mmap(NULL, n, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 76 | # endif // ifdef USE_DMTCP_ALLOC_ARENA |
| 77 | |
| 78 | if (p == MAP_FAILED) { |
| 79 | perror("DMTCP(" __FILE__ "): _alloc_raw: "); |
| 80 | } |
| 81 | |
| 82 | # ifdef JALLOC_DEBUG_STATS |
| 83 | if (p != MAP_FAILED) { |
| 84 | int idx = __sync_fetch_and_add(&numAllocArenas, 1); |
| 85 | if (idx < MAX_ARENAS) { |
| 86 | allocArenas[idx].startAddr = p; |
| 87 | allocArenas[idx].endAddr = (char*)p + n; |
| 88 | } |
| 89 | } |
| 90 | # endif // ifdef JALLOC_DEBUG_STATS |
| 91 | |
| 92 | return p; |
| 93 | # endif // ifdef JALIB_USE_MALLOC |
| 94 | } |
| 95 | |
| 96 | void jalib::JAlloc::getAllocArenas(JAllocArena **arenas, int *numArenas) |
| 97 | { |