Question

我有一个简单的程序：

#include <iostream>

int main() {
    std::cout << "Starting" << std::endl;
    while (1) {
    }

    return 0;
}

我编译并运行它：

clang -o test test.cpp
bash$ ./test
Starting

在另一个终端，我检查并杀死它：

bash$ top

Processes: 284 total, 3 running, 9 stuck, 272 sleeping, 1505 threads                       14:45:49
Load Avg: 1.86, 1.81, 2.06  CPU usage: 13.57% user, 0.96% sys, 85.45% idle
SharedLibs: 21M resident, 12M data, 0B linkedit.
MemRegions: 87372 total, 4974M resident, 86M private, 1203M shared.
PhysMem: 15G used (1887M wired), 1450M unused.
VM: 729G vsize, 1064M framework vsize, 3299196(0) swapins, 3711511(0) swapouts.
Networks: packets: 2686338/648M in, 2068186/355M out.
Disks: 1141818/44G read, 1926370/100G written.

PID    COMMAND      %CPU  TIME     #TH   #WQ  #PORT MEM    PURG   CMPRS  PGRP  PPID  STATE
30161  test         100.3 02:12.71 1/1   0    9     312K   0B     0B     29470 28181 running
66064  Terminal     2.7   01:29.69 9     3    257   53M    0B     4580K  66064 1     sleeping


bash$ ls -al /cores/
total 917024
drwxrwxr-t@  3 root    admin        102 May  1 14:54 .
drwxr-xr-x  33 root    wheel       1190 Apr 14 09:13 ..

bash$ killall -SIGSEGV test

bash$ ls -al /cores/
total 1818048
drwxrwxr-t@  4 root    admin        136 May  1 14:55 .
drwxr-xr-x  33 root    wheel       1190 Apr 14 09:13 ..
-r--------   1 stebro  admin  469516288 May  1 14:54 core.30161

vmmap说：

==== Summary for process 50745
ReadOnly portion of Libraries: Total=316K resident=280K(89%) swapped_out_or_unallocated=36K(11%)
Writable regions: Total=40.3M written=16K(0%) resident=12.1M(30%) swapped_out=14.4M(36%) unallocated=28.3M(70%)

REGION TYPE                      VIRTUAL
===========                      =======
Kernel Alloc Once                     4K
MALLOC                             9388K        see MALLOC ZONE table below
MALLOC (admin)                       24K
STACK GUARD                        56.0M
Stack                              8192K
VM_ALLOCATE                           4K
__DATA                              680K
__LINKEDIT                         70.9M
__TEXT                             5960K
shared memory                         4K
===========                      =======
TOTAL                             150.6M

                                 VIRTUAL ALLOCATION      BYTES
MALLOC ZONE                         SIZE      COUNT  ALLOCATED  % FULL
===========                      =======  =========  =========  ======
DefaultMallocZone_0x104a0e000      9216K        357        27K      0%

为什么我的核心文件是469 MB？

Answer 1

您的核心转储包括完整的内存状态以及您的应用程序当时运行的框架和库的符号信息。那是很多数据。有关更多信息，您可以查看technical note 2124

的核心转储部分

为什么OSX核心文件如此之大？

1 个答案: