1 #
2 # Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 #
5 # This code is free software; you can redistribute it and/or modify it
6 # under the terms of the GNU General Public License version 2 only, as
7 # published by the Free Software Foundation. Oracle designates this
8 # particular file as subject to the "Classpath" exception as provided
9 # by Oracle in the LICENSE file that accompanied this code.
10 #
11 # This code is distributed in the hope that it will be useful, but WITHOUT
12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 # version 2 for more details (a copy is included in the LICENSE file that
15 # accompanied this code).
16 #
17 # You should have received a copy of the GNU General Public License version
18 # 2 along with this work; if not, write to the Free Software Foundation,
19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 #
21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 # or visit www.oracle.com if you need additional information or have any
23 # questions.
24 #
25
26 $(eval $(call IncludeCustomExtension, hotspot/lib/JvmMapfile.gmk))
27
28 ################################################################################
29 # Combine a list of static symbols
30
31 ifeq ($(call And, $(call isTargetOs, windows) $(call isTargetCpu, x86_64)), false)
32 # On Windows x86_64, we should not have any symbols at all, since that
33 # results in duplicate warnings from the linker (JDK-8043491).
34 SYMBOLS_SRC += $(TOPDIR)/make/hotspot/symbols/symbols-shared
35 endif
36
37 ifeq ($(call isTargetOsType, unix), true)
38 SYMBOLS_SRC += $(TOPDIR)/make/hotspot/symbols/symbols-unix
39 endif
40
41 ifneq ($(wildcard $(TOPDIR)/make/hotspot/symbols/symbols-$(OPENJDK_TARGET_OS)), )
42 SYMBOLS_SRC += $(TOPDIR)/make/hotspot/symbols/symbols-$(OPENJDK_TARGET_OS)
43 endif
44
45 ifneq ($(findstring debug, $(DEBUG_LEVEL)), )
46 ifneq ($(wildcard $(TOPDIR)/make/hotspot/symbols/symbols-$(OPENJDK_TARGET_OS)-debug), )
47 SYMBOLS_SRC += $(TOPDIR)/make/hotspot/symbols/symbols-$(OPENJDK_TARGET_OS)-debug
48 endif
49 endif
50
51 ################################################################################
52 # Create a dynamic list of symbols from the built object files. This is highly
53 # platform dependent.
54
55 ifeq ($(call isTargetOs, linux), true)
56 DUMP_SYMBOLS_CMD := $(NM) --defined-only *.o
57 ifneq ($(FILTER_SYMBOLS_PATTERN), )
58 FILTER_SYMBOLS_PATTERN := $(FILTER_SYMBOLS_PATTERN)|
59 endif
60 FILTER_SYMBOLS_PATTERN := $(FILTER_SYMBOLS_PATTERN)^_ZTV|^gHotSpotVM|^UseSharedSpaces$$
61 FILTER_SYMBOLS_PATTERN := $(FILTER_SYMBOLS_PATTERN)|^_ZN9Arguments17SharedArchivePathE$$
62 FILTER_SYMBOLS_AWK_SCRIPT := \
63 '{ \
64 if ($$3 ~ /$(FILTER_SYMBOLS_PATTERN)/) print $$3; \
65 }'
66
67 else ifeq ($(call isTargetOs, macosx), true)
68 # nm on macosx prints out "warning: nm: no name list" to stderr for
69 # files without symbols. Hide this, even at the expense of hiding real errors.
70 DUMP_SYMBOLS_CMD := $(NM) -Uj *.o 2> /dev/null
71 ifneq ($(FILTER_SYMBOLS_PATTERN), )
72 FILTER_SYMBOLS_PATTERN := $(FILTER_SYMBOLS_PATTERN)|
73 endif
74 FILTER_SYMBOLS_PATTERN := $(FILTER_SYMBOLS_PATTERN)^_ZTV|^gHotSpotVM
75 FILTER_SYMBOLS_AWK_SCRIPT := \
76 '{ \
77 if ($$3 ~ /$(FILTER_SYMBOLS_PATTERN)/) print $$3; \
78 }'
79
80 # NOTE: The script is from the old build. It is broken and finds no symbols.
81 # The script below might be what was intended, but it failes to link with tons
82 # of 'cannot export hidden symbol vtable for X'.
83 # '{ if ($$1 ~ /^__ZTV/ || $$1 ~ /^_gHotSpotVM/) print substr($$1, 2) }'
84 else ifeq ($(call isTargetOs, aix), true)
85 # NOTE: The old build had the solution below. This should to be fixed in
86 # configure instead.
87
88 # On AIX we have to prevent that we pick up the 'nm' version from the GNU binutils
89 # which may be installed under /opt/freeware/bin. So better use an absolute path here!
90 # NM=/usr/bin/nm
91
92 DUMP_SYMBOLS_CMD := $(NM) -X64 -B -C *.o
93 FILTER_SYMBOLS_AWK_SCRIPT := \
94 '{ \
95 if (($$2="d" || $$2="D") && ($$3 ~ /^__vft/ || $$3 ~ /^gHotSpotVM/)) print $$3; \
96 if ($$3 ~ /^UseSharedSpaces$$/) print $$3; \
97 if ($$3 ~ /^SharedArchivePath__9Arguments$$/) print $$3; \
98 }'
99
100 else ifeq ($(call isTargetOs, windows), true)
101 DUMP_SYMBOLS_CMD := $(DUMPBIN) -symbols *.obj
102 FILTER_SYMBOLS_AWK_SCRIPT := \
103 '{ \
104 if ($$7 ~ /??_7.*@@6B@/ && $$7 !~ /type_info/) print $$7; \
105 }'
106
107 else
108 $(error Unknown target OS $(OPENJDK_TARGET_OS) in JvmMapfile.gmk)
109 endif
110
111 # A more correct solution would be to send BUILD_LIBJVM_ALL_OBJS instead of
112 # cd && *.o, but this will result in very long command lines, which is
113 # problematic on some platforms.
114 $(JVM_OUTPUTDIR)/symbols-objects: $(BUILD_LIBJVM_ALL_OBJS)
115 $(call LogInfo, Generating symbol list from object files)
116 $(CD) $(JVM_OUTPUTDIR)/objs && \
117 $(DUMP_SYMBOLS_CMD) | $(NAWK) $(FILTER_SYMBOLS_AWK_SCRIPT) | $(SORT) -u > $@
118
119 SYMBOLS_SRC += $(JVM_OUTPUTDIR)/symbols-objects
120
121 ################################################################################
122 # Now concatenate all symbol lists into a single file and remove comments.
123
124 $(JVM_OUTPUTDIR)/symbols: $(SYMBOLS_SRC)
125 $(SED) -e '/^#/d' $^ > $@
126
127 ################################################################################
128 # Finally convert the symbol list into a platform-specific mapfile
129
130 ifeq ($(call isTargetOs, macosx), true)
131 # On macosx, we need to add a leading underscore
132 define create-mapfile-work
133 $(AWK) '{ if ($$0 ~ ".") { print " _" $$0 } }' < $^ > $@.tmp
134 endef
135 else ifeq ($(call isTargetOs, windows), true)
136 # On windows, add an 'EXPORTS' header
137 define create-mapfile-work
138 $(ECHO) "EXPORTS" > $@.tmp
139 $(AWK) '{ if ($$0 ~ ".") { print " " $$0 } }' < $^ >> $@.tmp
140 endef
141 else
142 # Assume standard linker script
143 define create-mapfile-work
144 $(PRINTF) "SUNWprivate_1.1 { \n global: \n" > $@.tmp
145 $(AWK) '{ if ($$0 ~ ".") { print " " $$0 ";" } }' < $^ >> $@.tmp
146 $(PRINTF) " local: \n *; \n }; \n" >> $@.tmp
147 endef
148 endif
149
150 define create-mapfile
151 $(call LogInfo, Creating mapfile)
152 $(call MakeDir, $(@D))
153 $(call create-mapfile-work)
154 $(RM) $@
155 $(MV) $@.tmp $@
156 endef
157
158 $(JVM_MAPFILE): $(JVM_OUTPUTDIR)/symbols
159 $(call create-mapfile)