segfault in Core Analyzer

[den818]

I try to analyze dump witch was created by gcore. And Core Analyzer crushed

{ "signal": 11
, "executable": "/home/korden/core_analyzer-2.17.0/app/Linux/core_analyzer"
, "stacktrace":
[ { "crash_thread": true
, "frames":
[ { "address": 4242143
, "build_id": "d4eced4303dcf56ece60431a2702f7a48a26c422"
, "build_id_offset": 47839
, "function_name": "walk_inuse_blocks(inuse_block*, unsigned long*)"
, "file_name": "/home/korden/core_analyzer-2.17.0/app/Linux/core_analyzer"
}
, { "address": 4228774
, "build_id": "d4eced4303dcf56ece60431a2702f7a48a26c422"
, "build_id_offset": 34470
, "function_name": "build_inuse_heap_blocks(unsigned long*)"
, "file_name": "/home/korden/core_analyzer-2.17.0/app/Linux/core_analyzer"
}
, { "address": 4229154
, "build_id": "d4eced4303dcf56ece60431a2702f7a48a26c422"
, "build_id_offset": 34850
, "function_name": "display_heap_leak_candidates()"
, "file_name": "/home/korden/core_analyzer-2.17.0/app/Linux/core_analyzer"
}
, { "address": 4202550
, "build_id": "d4eced4303dcf56ece60431a2702f7a48a26c422"
, "build_id_offset": 8246
, "function_name": "main"
, "file_name": "/home/korden/core_analyzer-2.17.0/app/Linux/core_analyzer"
} ]
} ]
}

#0 0x000000000040badf in walk_inuse_blocks (opBlocks=, opCount=0x7ffc52656438) at ../heap_ptmalloc.cpp:643
#1 0x00000000004086a6 in build_inuse_heap_blocks (opCount=0x7ffc526564a8) at ../heap.cpp:555
#2 0x0000000000408822 in display_heap_leak_candidates () at ../heap.cpp:1132
#3 0x0000000000402036 in main (argc=, argv=) at ../main.cpp:256

(gdb)
638 {
639 struct ca_heap* heap = g_sorted_heaps[heap_index];
640 union ca_malloc_chunk achunk;
641
642 // For mmap heap, there is only one block and in-use
643 if (heap->mArena->mType == ENUM_HEAP_MMAP_BLOCK)
644 {
645 if (!read_memory_wrapper(NULL, heap->mStartAddr - size_t_sz, &achunk, mchunk_sz))
646 continue;
647 (*opCount)++;
(gdb) p *heap
$1 = {mArena = 0x7f5f852e9770, mpNext = 0x1f3ecb0, mSegment = 0x7f5fa763da00, mStartAddr = 139714547941416, mEndAddr = 139714550190080, mChunks = 0x0, mNumChunks = 0, mCorrupted = 0, mResearved = 0}
(gdb) p heap->mArena
$2 = (ca_arena *) 0x7f5f852e9770
(gdb) p *(heap->mArena)
Cannot access memory at address 0x7f5f852e9770

[yanqi27]

I am not sure why the arena object is invalid. @den818 If it is possible, you can send the core file to me and I should be able to reproduce it locally.

[yanqi27]

Close it unless more data is available.