View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000547 | LDMud 3.3 | Portability | public | 2008-07-02 13:42 | 2008-07-02 15:35 |
| Reporter | zesstra | Assigned To | |||
| Priority | normal | Severity | crash | Reproducibility | always |
| Status | resolved | Resolution | no change required | ||
| Platform | x86_64 | OS | MacOS X | OS Version | 10.5.x |
| Product Version | 3.3.716 | ||||
| Summary | 0000547: possible crash upon (first) memory allocation (x86_64) | ||||
| Description | A binary compiled for x86_64 on MacOS 10.5.3 crashes while allocating the first chunk of memory with Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000001008c6104 Stacktrace: (gdb) bt full #0 0x0000000100115150 in add_large_free (ptr=0x100846004, block_size=65568) at slaballoc.c:3031 No locals. 0000001 0x00000001001155a3 in large_malloc (size=2960, force_more=0) at slaballoc.c:3289 chunk_size = 262272 block_size = 65568 extra = 0 real_size = 8 ptr = (word_t *) 0x100846004 orig_size = 11828 0000002 0x0000000100112ca1 in mem_alloc (size=64) at slaballoc.c:1717 numObjects = 184 slabSize = 11828 slab = (mslab_t *) 0x0 block = (word_t *) 0x0 ix = 7 0000003 0x00000001001172ce in xalloc_traced (size=56, malloc_trace_file=0x1001281eb "main.c", malloc_trace_line=404) at xalloc.c:540 p = (word_t *) 0x10012a7aa 0000004 0x00000001000905f0 in main (argc=2, argv=0x7fff5fbff858) at main.c:404 buf = "__DEBUG_LOG__=\"/phoenix.debug.log\"", '\0' <repeats 261 times> name = 0x7fff5fbff3f0 "phoenix.debug.log\"" tmp = (struct lpc_predef_s *) 0x0 i = 246 p = 0x7fff5fbff7f4 "\366" set = 8192 rc = 0 add_large_free() tries to join neighbouring free blocks and the first thing is: /* If the next block is free, coagulate */ if (!(*(ptr+block_size) & THIS_BLOCK)) { remove_from_free_list(ptr+block_size); block_size += (ptr+block_size)[M_LSIZE]; } (gdb) print ptr+block_size $2 = (word_t *) 0x1008c6104 (gdb) print *(ptr+block_size) Cannot access memory at address 0x1008c6104 There is no memory mapped at 0x1008c6104 (see below the relevant part of the process address space) as the allocated block is the first allocated block. MALLOC_LARGE 0000000100846000-0000000100847000 [ 4K] rw-/rwx SM=COW MALLOC_LARGE 0000000100847000-0000000100887000 [ 256K] rw-/rwx SM=ZER MALLOC_TINY 0000000100900000-0000000100901000 [ 4K] rw-/rwx SM=COW | ||||
| Tags | No tags attached. | ||||
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Ok, after some discussion with Gnomi and searching through stuff, the problem is caused by wrong values for SIZEOF_CHAR_P and SIZEOF_LONG in machine.h and therefore some configure problem. Was then solved by the right target and host options for configure... (Why did that work a few weeks ago with the old configure script...?) |
