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NDK中使用pthread多线程中自己写的一个BUG，ndkpthread
在使用pthread进行NDK中的多线程开发时，自己写了一个BUG，
1 void *darkGrayThread(void *args) 2 { 3 ThreadParam *param = (ThreadParam *)args; 4 LOG("start%d end%d ", param->start, param->end); 5 int end = param->end; 6 for(int i = param->start, j = i * 4; i < end; ++i, j+=4) 7 { 8 LOG("d1"); 9 param->r[i] = param->rgba[j]; 10 param->g[i] = param->rgba[j + 1]; 11 param->b[i] = param->rgba[j + 2]; 12 LOG("d2 %d end%d", i, param->end); 13 param->dark[i] = MINT(param->rgba[j], param->rgba[j + 1], param->rgba[j + 2]); 14 param->gray[i] = (UCHAR)((param->rgba[j] * 1224 + param->rgba[j + 1] * 2404 +param->rgba[j + 2] * 467) >> 12); 15 LOG("d3"); 16 } 17 }
这个是启动函数，即相当于Java中的Thread的run方法。初一看没啥问题，编译也能过，APP也能跑，但是每次都会crash。我把crash线程的log贴出来如下：
1 04-16 14:28:31.577 27602 28062 D MyJni : d2 2087309 end2073600 2 04-16 14:28:31.637 27602 28062 D MyJni : d3 3 04-16 14:28:31.641 27602 28062 D MyJni : d3 4 04-16 14:28:31.641 27602 28062 D MyJni : d1 5 04-16 14:28:31.641 27602 28062 D MyJni : d2 2087552 end2073600 6 04-16 14:28:31.642 27602 28062 D MyJni : d3 7 04-16 14:28:31.642 27602 28062 D MyJni : d1 8 04-16 14:28:31.642 27602 28062 D MyJni : d1 9 04-16 14:28:31.642 27602 28062 D MyJni : d2 2087567 end2073600 10 04-16 14:28:31.642 27602 28062 D MyJni : d3 11 04-16 14:28:31.642 27602 28062 D MyJni : d3 12 04-16 14:28:31.785 27602 28062 D MyJni : d2 2089380 end2073600 13 04-16 14:28:31.785 27602 28062 D MyJni : d3 14 04-16 14:28:31.785 27602 28062 D MyJni : d1 15 04-16 14:28:31.786 27602 28062 D MyJni : d1 16 04-16 14:28:31.786 27602 28062 D MyJni : d2 2089401 end2073600 17 04-16 14:28:31.786 27602 28062 D MyJni : d2 2089402 end2073600 18 04-16 14:28:31.786 27602 28062 D MyJni : d3 19 04-16 14:28:31.786 27602 28062 D MyJni : d2 2089404 end2073600 20 04-16 14:28:32.339 27602 28062 F libc : Fatal signal 11 (SIGSEGV), code 1, fault addr 0xc6800000 in tid 28062 (Thread-4) 21 04-16 14:28:32.339 27602 28062 F libc : Fatal signal 11 (SIGSEGV), code 1, fault addr 0xc6800000 in tid 28062 (Thread-4) 22 04-16 14:28:32.340 454 454 W : debuggerd: handling request: pid=27602 uid=10129 gid=10129 tid=28062 23 04-16 14:28:32.381 28088 28088 F DEBUG : pid: 27602, tid: 28062, name: Thread-4 >>> com.willhua.opencvstudy <<< 24 04-16 14:28:32.381 28088 28088 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xc6800000 25 04-16 14:28:32.381 28088 28088 F DEBUG : r0 000000a7 r1 c6600000 r2 cac6ef0e r3 000000be 26 04-16 14:28:32.381 28088 28088 F DEBUG : r4 caa4ca9c r5 00200000 r6 00000964 r7 c62038f8 27 04-16 14:28:32.381 28088 28088 F DEBUG : r8 00800002 r9 000001d3 sl cac6ef0e fp cac6ebe0 28 04-16 14:28:32.381 28088 28088 F DEBUG : ip c7680000 sp c62038e8 lr caa8e93f pc caa8e99a cpsr 200f0030 29 04-16 14:28:32.383 28088 28088 F DEBUG : 30 04-16 14:28:32.383 28088 28088 F DEBU