pullpullpull

.hgignore

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+^build/
+^dist/
+nbproject/private/
+^webrev
+^.hgtip
+^.bridge2
+.DS_Store

.jcheck/conf

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+project=jdk8
+bugids=dup

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>OpenJDK</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>

ASSEMBLY_EXCEPTION

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+
+OPENJDK ASSEMBLY EXCEPTION
+
+The OpenJDK source code made available by Sun at openjdk.java.net and
+openjdk.dev.java.net ("OpenJDK Code") is distributed under the terms of the
+GNU General Public License <http://www.gnu.org/copyleft/gpl.html> version 2
+only ("GPL2"), with the following clarification and special exception.
+
+    Linking this OpenJDK Code statically or dynamically with other code
+    is making a combined work based on this library.  Thus, the terms
+    and conditions of GPL2 cover the whole combination.
+
+    As a special exception, Sun gives you permission to link this
+    OpenJDK Code with certain code licensed by Sun as indicated at
+    http://openjdk.java.net/legal/exception-modules-2007-05-08.html
+    ("Designated Exception Modules") to produce an executable,
+    regardless of the license terms of the Designated Exception Modules,
+    and to copy and distribute the resulting executable under GPL2,
+    provided that the Designated Exception Modules continue to be
+    governed by the licenses under which they were offered by Sun.
+
+As such, it allows licensees and sublicensees of Sun's GPL2 OpenJDK Code to
+build an executable that includes those portions of necessary code that Sun
+could not provide under GPL2 (or that Sun has provided under GPL2 with the
+Classpath exception).  If you modify or add to the OpenJDK code, that new
+GPL2 code may still be combined with Designated Exception Modules if the
+new code is made subject to this exception by its copyright holder.

GC到生成OopMap的调用栈

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+JVM默认单线程GC到生成OopMap的调用栈
+ GenerateOopMap::compute_map(Thread *) : void
+OopMapForCacheEntry::compute_map(Thread *) : void
+OopMapCacheEntry::fill(methodHandle, int) : void
+OopMapCache::compute_one_oop_map(methodHandle, int, InterpreterOopMap *) : void
+frame::oops_interpreted_do(OopClosure *, CLDClosure *, const RegisterMap *, bool) : void
+frame::oops_do_internal(OopClosure *, CLDClosure *, CodeBlobClosure *, RegisterMap *, bool) : void
+frame::oops_do(OopClosure *, CLDClosure *, CodeBlobClosure *, RegisterMap *) : void
+JavaThread::oops_do(OopClosure *, CLDClosure *, CodeBlobClosure *) : void
+Threads::possibly_parallel_oops_do(OopClosure *, CLDClosure *, CodeBlobClosure *) : void
+SharedHeap::process_roots(bool, enum ScanningOption, OopClosure *, OopClosure *, CLDClosure *, CLDClosure *,                                                 CodeBlobClosure *) : void
+GenCollectedHeap::gen_process_roots(int, bool, bool, enum ScanningOption, OopsInGenClosure *, OopsInGenClosure *, OopsInGenClosure *, CLDClosure *, CLDClosure *, CodeBlobClosure *) : void
+GenCollectedHeap::gen_process_roots(int, bool, bool, enum ScanningOption, bool, OopsInGenClosure *, OopsInGenClosure *,                                                                 CLDClosure *) : void
+DefNewGeneration::collect(bool, bool, size_t, bool) : void
+GenCollectedHeap::do_collection(bool, bool, size_t, bool, int) : void
+GenCollectedHeap::do_full_collection(bool, int) : void (2 matches)
+VM_GenCollectFull::doit() : void
+VM_Operation::evaluate() : void
+VMThread::execute(VM_Operation *) : void (2 matches)
+GenCollectedHeap::collect_locked(enum Cause, int) : void
+GenCollectedHeap::collect_locked(enum Cause) : void
+GenCollectedHeap::collect(enum Cause, int) : void
+GenCollectedHeap::collect(enum Cause) : void 
+JVM_GC() : void
+java : System.gc()

Makefile

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+#
+# Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+# This must be the first rule
+default:
+
+# Inclusion of this pseudo-target will cause make to execute this file
+# serially, regardless of -j. Recursively called makefiles will not be
+# affected, however. This is required for correct dependency management.
+.NOTPARALLEL:
+
+# The shell code below will be executed on /usr/ccs/bin/make on Solaris, but not in GNU make.
+# /usr/ccs/bin/make lacks basically every other flow control mechanism.
+TEST_FOR_NON_GNUMAKE:sh=echo You are not using GNU make/gmake, this is a requirement. Check your path. 1>&2 && exit 1
+
+# Assume we have GNU make, but check version.
+ifeq ($(strip $(foreach v, 3.81% 3.82% 4.%, $(filter $v, $(MAKE_VERSION)))), )
+  $(error This version of GNU Make is too low ($(MAKE_VERSION)). Check your path, or upgrade to 3.81 or newer.)
+endif
+
+# Locate this Makefile
+ifeq ($(filter /%,$(lastword $(MAKEFILE_LIST))),)
+  makefile_path:=$(CURDIR)/$(lastword $(MAKEFILE_LIST))
+else
+  makefile_path:=$(lastword $(MAKEFILE_LIST))
+endif
+root_dir:=$(dir $(makefile_path))
+
+# ... and then we can include our helper functions
+include $(root_dir)/make/MakeHelpers.gmk
+
+$(eval $(call ParseLogLevel))
+$(eval $(call ParseConfAndSpec))
+
+# Now determine if we have zero, one or several configurations to build.
+ifeq ($(SPEC),)
+  # Since we got past ParseConfAndSpec, we must be building a global target. Do nothing.
+else
+  ifeq ($(words $(SPEC)),1)
+    # We are building a single configuration. This is the normal case. Execute the Main.gmk file.
+    include $(root_dir)/make/Main.gmk
+  else
+    # We are building multiple configurations.
+    # First, find out the valid targets
+    # Run the makefile with an arbitrary SPEC using -p -q (quiet dry-run and dump rules) to find
+    # available PHONY targets. Use this list as valid targets to pass on to the repeated calls.
+    all_phony_targets=$(filter-out $(global_targets), $(strip $(shell \
+        cd $(root_dir) && $(MAKE) -p -q FRC SPEC=$(firstword $(SPEC)) | \
+        grep ^.PHONY: | head -n 1 | cut -d " " -f 2-)))
+
+    $(all_phony_targets):
+	@$(foreach spec,$(SPEC),(cd $(root_dir) && $(MAKE) SPEC=$(spec) \
+	    $(VERBOSE) VERBOSE=$(VERBOSE) LOG_LEVEL=$(LOG_LEVEL) $@) &&) true
+
+    .PHONY: $(all_phony_targets)
+
+  endif
+endif
+
+# Here are "global" targets, i.e. targets that can be executed without specifying a single configuration.
+# If you addd more global targets, please update the variable global_targets in MakeHelpers.
+
+help:
+	$(info )
+	$(info OpenJDK Makefile help)
+	$(info =====================)
+	$(info )
+	$(info Common make targets)
+	$(info .  make [default]         # Compile all product in langtools, hotspot, jaxp, jaxws,)
+	$(info .                         # corba and jdk)
+	$(info .  make all               # Compile everything, all repos and images)
+	$(info .  make images            # Create complete j2sdk and j2re images)
+	$(info .  make docs              # Create javadocs)
+	$(info .  make overlay-images    # Create limited images for sparc 64 bit platforms)
+	$(info .  make profiles          # Create complete j2re compact profile images)
+	$(info .  make bootcycle-images  # Build images twice, second time with newly build JDK)
+	$(info .  make install           # Install the generated images locally)
+	$(info .  make clean             # Remove all files generated by make, but not those)
+	$(info .                         # generated by configure)
+	$(info .  make dist-clean        # Remove all files, including configuration)
+	$(info .  make help              # Give some help on using make)
+	$(info .  make test              # Run tests, default is all tests (see TEST below))
+	$(info )
+	$(info Targets for specific components)
+	$(info (Component is any of langtools, corba, jaxp, jaxws, hotspot, jdk, nashorn, images, overlay-images, docs or test))
+	$(info .  make <component>       # Build <component> and everything it depends on. )
+	$(info .  make <component>-only  # Build <component> only, without dependencies. This)
+	$(info .                         # is faster but can result in incorrect build results!)
+	$(info .  make clean-<component> # Remove files generated by make for <component>)
+	$(info )
+	$(info Useful make variables)
+	$(info .  make CONF=             # Build all configurations (note, assignment is empty))
+	$(info .  make CONF=<substring>  # Build the configuration(s) with a name matching)
+	$(info .                         # <substring>)
+	$(info )
+	$(info .  make LOG=<loglevel>    # Change the log level from warn to <loglevel>)
+	$(info .                         # Available log levels are:)
+	$(info .                         # 'warn' (default), 'info', 'debug' and 'trace')
+	$(info .                         # To see executed command lines, use LOG=debug)
+	$(info )
+	$(info .  make JOBS=<n>          # Run <n> parallel make jobs)
+	$(info .                         # Note that -jN does not work as expected!)
+	$(info )
+	$(info .  make test TEST=<test>  # Only run the given test or tests, e.g.)
+	$(info .                         # make test TEST="jdk_lang jdk_net")
+	$(info )
+
+.PHONY: help

README

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+README:
+  This file should be located at the top of the OpenJDK Mercurial root
+  repository. A full OpenJDK repository set (forest) should also include
+  the following 6 nested repositories:
+    "jdk", "hotspot", "langtools", "corba", "jaxws"  and "jaxp".
+
+  The root repository can be obtained with something like:
+    hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
+
+  You can run the get_source.sh script located in the root repository to get
+  the other needed repositories:
+    cd openjdk8 && sh ./get_source.sh
+
+  People unfamiliar with Mercurial should read the first few chapters of
+  the Mercurial book: http://hgbook.red-bean.com/read/
+
+  See http://openjdk.java.net/ for more information about OpenJDK.
+
+Simple Build Instructions:
+
+  0. Get the necessary system software/packages installed on your system, see
+     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html
+
+  1. If you don't have a jdk7u7 or newer jdk, download and install it from
+     http://java.sun.com/javase/downloads/index.jsp
+     Add the /bin directory of this installation to your PATH environment
+     variable.
+
+  2. Configure the build:
+       bash ./configure
+
+  3. Build the OpenJDK:
+       make all
+     The resulting JDK image should be found in build/*/images/j2sdk-image
+
+where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
+is 3.81 or newer. Note that on Solaris, GNU make is called "gmake".
+
+Complete details are available in the file:
+     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html