jint init_globals() {
HandleMark hm;
management_init();
bytecodes_init();
classLoader_init();
codeCache_init();
VM_Version_init();
os_init_globals();
stubRoutines_init1();
jint status = universe_init(); // dependent on codeCache_init and
// stubRoutines_init1
if (status != JNI_OK)
return status;
interpreter_init(); // before any methods loaded
invocationCounter_init(); // before any methods loaded
marksweep_init();
accessFlags_init();
templateTable_init();
InterfaceSupport_init();
SharedRuntime::generate_stubs();
universe2_init(); // dependent on codeCache_init and stubRoutines_init1
referenceProcessor_init();
jni_handles_init();
#ifndef VM_STRUCTS_KERNEL
vmStructs_init();
#endif // VM_STRUCTS_KERNEL
vtableStubs_init();
InlineCacheBuffer_init();
compilerOracle_init();
compilationPolicy_init();
compileBroker_init();
VMRegImpl::set_regName();
if (!universe_post_init()) {
return JNI_ERR;
}
javaClasses_init(); // must happen after vtable initialization
stubRoutines_init2(); // note: StubRoutines need 2-phase init
// Although we'd like to, we can't easily do a heap verify
// here because the main thread isn't yet a JavaThread, so
// its TLAB may not be made parseable from the usual interfaces.
if (VerifyBeforeGC && !UseTLAB &&
Universe::heap()->total_collections() >= VerifyGCStartAt) {
Universe::heap()->prepare_for_verify();
Universe::verify(); // make sure we're starting with a clean slate
}
// All the flags that get adjusted by VM_Version_init and os::init_2
// have been set so dump the flags now.
if (PrintFlagsFinal) {
CommandLineFlags::printFlags(tty, false);
}
return JNI_OK;
}
jint init_globals() {
HandleMark hm;
management_init();
bytecodes_init();
classLoader_init();
codeCache_init();
VM_Version_init();
os_init_globals();
stubRoutines_init1();
jint status = universe_init(); // dependent on codeCache_init and
// stubRoutines_init1 and metaspace_init.
if (status != JNI_OK)
return status;
interpreter_init(); // before any methods loaded
invocationCounter_init(); // before any methods loaded
marksweep_init();
accessFlags_init();
templateTable_init();
InterfaceSupport_init();
SharedRuntime::generate_stubs();
universe2_init(); // dependent on codeCache_init and stubRoutines_init1
referenceProcessor_init();
jni_handles_init();
#if INCLUDE_VM_STRUCTS
vmStructs_init();
#endif // INCLUDE_VM_STRUCTS
vtableStubs_init();
InlineCacheBuffer_init();
compilerOracle_init();
compilationPolicy_init();
compileBroker_init();
VMRegImpl::set_regName();
if (!universe_post_init()) {
return JNI_ERR;
}
javaClasses_init(); // must happen after vtable initialization
stubRoutines_init2(); // note: StubRoutines need 2-phase init
// All the flags that get adjusted by VM_Version_init and os::init_2
// have been set so dump the flags now.
if (PrintFlagsFinal) {
CommandLineFlags::printFlags(tty, false);
}
return JNI_OK;
}
jint init_globals() {
HandleMark hm;
management_init();
bytecodes_init();
classLoader_init1();
compilationPolicy_init();
codeCache_init();
CodeCacheExtensions::initialize();
VM_Version_init();
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::VMVersion);
os_init_globals();
stubRoutines_init1();
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::StubRoutines1);
jint status = universe_init(); // dependent on codeCache_init and
// stubRoutines_init1 and metaspace_init.
if (status != JNI_OK)
return status;
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::Universe);
interpreter_init(); // before any methods loaded
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::Interpreter);
invocationCounter_init(); // before any methods loaded
marksweep_init();
accessFlags_init();
templateTable_init();
InterfaceSupport_init();
SharedRuntime::generate_stubs();
universe2_init(); // dependent on codeCache_init and stubRoutines_init1
referenceProcessor_init();
jni_handles_init();
#if INCLUDE_VM_STRUCTS
vmStructs_init();
#endif // INCLUDE_VM_STRUCTS
vtableStubs_init();
InlineCacheBuffer_init();
compilerOracle_init();
dependencyContext_init();
if (!compileBroker_init()) {
return JNI_EINVAL;
}
VMRegImpl::set_regName();
if (!universe_post_init()) {
return JNI_ERR;
}
javaClasses_init(); // must happen after vtable initialization
stubRoutines_init2(); // note: StubRoutines need 2-phase init
MethodHandles::generate_adapters();
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::StubRoutines2);
#if INCLUDE_NMT
// Solaris stack is walkable only after stubRoutines are set up.
// On Other platforms, the stack is always walkable.
NMT_stack_walkable = true;
#endif // INCLUDE_NMT
// All the flags that get adjusted by VM_Version_init and os::init_2
// have been set so dump the flags now.
if (PrintFlagsFinal || PrintFlagsRanges) {
CommandLineFlags::printFlags(tty, false, PrintFlagsRanges);
}
CodeCacheExtensions::complete_step(CodeCacheExtensionsSteps::InitGlobals);
return JNI_OK;
}
jint init_globals() {
HandleMark hm;
// 初始化各子系统的监控及管理服务
// JMX、线程和同步子系统、类加载子系统的监控和管理
management_init();
// 初始化字节码表，如istore、iload、iadd
bytecodes_init();
// 类加载器初始化
classLoader_init();
// 代码缓存池初始化
codeCache_init();
// VM版本初始化
VM_Version_init();
// 系统初始化
os_init_globals();
stubRoutines_init1();
// ============================
// 初始化堆以及决定所使用GC策略
// ============================
jint status = universe_init(); // dependent on codeCache_init and
// stubRoutines_init1
if (status != JNI_OK)
return status;
// 初始化解析器
interpreter_init(); // before any methods loaded
// 初始化动作触发器
invocationCounter_init(); // before any methods loaded
// 初始化MarkSweep
marksweep_init();
// 初始化访问标识
accessFlags_init();
// 初始化操作码模板表
templateTable_init();
// 接口支持提供了VM_LEAF_BASE和VM_ENTRY_BASE宏
InterfaceSupport_init();
SharedRuntime::generate_stubs();
// 初始化语法表及系统字典等
universe2_init(); // dependent on codeCache_init and stubRoutines_init1
// 初始化软引用时间戳表并设定软引用清除策略
referenceProcessor_init();
jni_handles_init();
// 代码数据结构的必要性检查（仅限debug版本）
vmStructs_init();
vtableStubs_init();
InlineCacheBuffer_init();
// oracle编译器初始化（oracle编译器是一个编译器开关接口）
compilerOracle_init();
// 初始化编译策略（根据启动参数决定编译策略）
compilationPolicy_init();
compileBroker_init();
VMRegImpl::set_regName();
// 执行初始化
if (!universe_post_init()) {
return JNI_ERR;
}
// 计算各种filed的偏移量？？
javaClasses_init(); // must happen after vtable initialization
stubRoutines_init2(); // note: StubRoutines need 2-phase init
// All the flags that get adjusted by VM_Version_init and os::init_2
// have been set so dump the flags now.
if (PrintFlagsFinal) {
CommandLineFlags::printFlags(tty, false);
}
return JNI_OK;
}