Thread. Source code analysis of start() method

For threads Thread Class has a core method called start(), Its bottom layer calls start0() This native Method .

Want to continue to learn more start0 What did you do , We need to download one OpenJDK
openjdk Write in JNI Usually one-to-one correspondence ,Thread.java The corresponding is Thread.c( be located openjdk8\jdk\src\share\native\java\lang Under the table of contents ), At this point, you can see the source code in jvm.h Declaration found in

Continue to read jvm.cpp file （openjdk8\hotspot\src\share\vm\prims） Medium JVM_StartThread Method


By reading the above method , We see the key calls Thread::start(native_thread), So we need to keep chasing , see thread.cpp file （ be located openjdk\hotspot\src\share\vm\runtime Under the table of contents ）, After analysis, the source code includes comments , We found that the operating system allocates threads at the bottom .