SIGBUS信号处理
功能描述
结合数据库运行信息处理SIGBUS返回值，将处理结果记录到日志后再中止数据库运行。
提示信息说明
| 日志信息注释 | 数据库日志提示信息 |
|---|---|
| 数据库初始化共享内存打印日志 | “LOG: Buffer poll start virtual address = xxxxx .”，记录内存结束位置”LOG: Buffer pool end virtual address = xxxxx.” |
| 无效的地址对齐/不存在的物理地址/特定对象硬件错误 | PANIC: errcode:xxxx, SIGBUS signal received, Gaussdb will shut down immediately. |
| SIGBUS地址错误在共享缓冲区并被使用 | PANIC: Uncorrected Error occurred at dirty page. The error address is:xxxxx, Gaussdb wil shut down immediately. |
| SIGBUS地址错误在共享缓冲区未被使用 | WARNING: Uncorrected Error occurred at clean/free page. The error address is:xxxx. GaussDB will shutdown. |
| SIGBUS返回地址为0 | PANIC: SIGBUS signal received, sigbus addr is None. Gaussdb will shut down immediately. |
| SIGBUS返回地址为其他 | PANIC: SIGBUS signal received. The error address is:xxx, Gaussdb will shut down immediately. |
注：以上xxxx代表需要打印的变量信息。
注意事项
SIGBUS信号处理依赖GUC参数enable_incremental_checkpoint，请确保该参数处于开启状态（默认开启）。
