OTP 源码编译
来自Dennis的知识库
2017年1月7日 (六) 11:21Dennis zhuang(讨论 | 贡献)的版本
OTP 源码阅读杂记
编译
git clone https://github.com/erlang/otp.git cd otp export ERL_TOP=`pwd` ./otp_build setup brew install fop openssl ./configure --help #查看编译选项 ./configure --with-ssl=/usr/local/opt/openssl make
erl_process.c
- 优先运行 port 直到完成。
/* * Find a new port to run. */ if (RUNQ_READ_LEN(&rq->ports.info.len)) { int have_outstanding_io; have_outstanding_io = erts_port_task_execute(rq, &esdp->current_port); if ((!erts_eager_check_io && have_outstanding_io && fcalls > 2*input_reductions) || rq->halt_in_progress) { /* * If we have performed more than 2*INPUT_REDUCTIONS since * last call to erl_sys_schedule() and we still haven't * handled all I/O tasks we stop running processes and * focus completely on ports. * * One could argue that this is a strange behavior. The * reason for doing it this way is that it is similar * to the behavior before port tasks were introduced. * We don't want to change the behavior too much, at * least not at the time of writing. This behavior * might change in the future. * * /rickard */ goto check_activities_to_run; } }
- erl_lock_check.c 确保 BEAM 的加锁顺序是一致的,防止死锁。
* Description: A lock checker that checks that each thread acquires * locks according to a predefined global lock order. The * global lock order is used to prevent deadlocks. If the * lock order is violated, an error message is printed * and the emulator aborts. The lock checker is only * intended to be enabled when debugging.