8030027: nsk/jvmti/scenarios/hotswap/HS101/hs101t006 Crashed the vm on Linux-amd64: SIGSEGV in JavaThread::last_java_vframe(RegisterMap*)+0xfa
Summary: Add a safe guard to VMOp_GetCurrentLocation against non-walkable stack of target thread exiting from Java execution
Reviewed-by: mgronlun, dholmes, sla, dcubed
Contributed-by: serguei.spitsyn@oracle.com
#
# 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 was split out from Profiles.gmk to allow GenSrcMisc.gmk to include it
# without attempting to generate lists for output files that don't exist yet
# These are the external names of each profile
PROFILE_NAMES := compact1 compact2 compact3
# The include files use 1,2,3 for simplicity and conciseness. Internally we
# use profile_1, profile_2 and profile_3.
ALL_PROFILES := profile_1 profile_2 profile_3
# This defines targets to generate per-profile Version.java/class files into
# distinct locations
VERSION_JAVA_DIR := sun/misc
VERSION_JAVA_FILE := Version.java
VERSION_JAVA_PATH := $(VERSION_JAVA_DIR)/$(VERSION_JAVA_FILE)
VERSION_CLASS_PATH := $(VERSION_JAVA_PATH:.java=.class)
PROFILE_VERSION_JAVA_TARGETS := $(foreach i, $(ALL_PROFILES), $(subst XXX,$i, $(JDK_OUTPUTDIR)/gen_XXX/$(VERSION_JAVA_PATH)))
PROFILE_VERSION_CLASS_TARGETS := $(foreach i, $(PROFILE_VERSION_JAVA_TARGETS), $(i:.java=.class))
# Function to map from profile designator, profile_1 etc, to its number
profile_number = $(if $(patsubst profile_%,%, $(1)), $(patsubst profile_%,%, $(1)), $(words $(PROFILE_NAMES) extra))
# Function to map from profile number, 1, 2 etc, to the corresponding name
# An invalid number maps to an empty name
profile_name = $(word $(1), $(PROFILE_NAMES))
# Function to isolate a profile number from a Version.java target
# Evaluates to the arg if the arg is not a profile version target
profile_version_number = $(patsubst $(JDK_OUTPUTDIR)/gen_profile_%/$(VERSION_JAVA_PATH), %, $(1))
# Function to go from a profile Version.java target to profile name. If not
# a profile version target then we need a number that maps to an empty name
profile_version_name = $(word $(if $(filter-out $(call profile_version_number, $(1)), $(1)), $(call profile_version_number, $(1)), $(words $(PROFILE_NAMES) extra)), $(PROFILE_NAMES))