Wed, 06 Jul 2011 18:15:21 -0700
7062856: Disassembler needs to be smarter about finding hsdis after 1.7 launcher changes
Summary: do explicit lookup emulating old LD_LIBRARY_PATH search
Reviewed-by: kvn, jrose
1 Copyright (c) 2008 Oracle and/or its affiliates. All rights reserved.
2 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 This code is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License version 2 only, as
6 published by the Free Software Foundation.
8 This code is distributed in the hope that it will be useful, but WITHOUT
9 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 version 2 for more details (a copy is included in the LICENSE file that
12 accompanied this code).
14 You should have received a copy of the GNU General Public License version
15 2 along with this work; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 or visit www.oracle.com if you need additional information or have any
20 questions.
22 ________________________________________________________________________
24 'hsdis': A HotSpot plugin for disassembling dynamically generated code.
26 The files in this directory (Makefile, hsdis.[ch], hsdis-demo.c)
27 are built independently of the HotSpot JVM.
29 To use the plugin with a JVM, you need a new version that can load it.
30 If the product mode of your JVM does not accept -XX:+PrintAssembly,
31 you do not have a version that is new enough.
33 * Building
35 To build this project you a copy of GNU binutils to build against. It
36 is known to work with binutils 2.17 and binutils 2.19.1. Download a
37 copy of the software from http://directory.fsf.org/project/binutils or
38 one of it's mirrors. Builds targetting windows should use at least
39 2.19 and currently requires the use of a cross compiler.
41 The makefile looks for the sources in build/binutils or you can
42 specify it's location to the makefile using BINTUILS=path. It will
43 configure binutils and build it first and then build and link the
44 disasembly adapter. Make all will build the default target for your
45 platform. If you platform support both 32 and 64 simultaneously then
46 "make both" will build them both at once. "make all64" will
47 explicitly build the 64 bit version. By default this will build the
48 disassembler library only. If you build demo it will build a demo
49 program that attempts to exercise the library.
51 Windows
53 In theory this should be buildable on Windows but getting a working
54 GNU build environment on Windows has proven difficult. MINGW should
55 be able to do it but at the time of this writing I was unable to get
56 this working. Instead you can use the mingw cross compiler on linux
57 to produce the windows binaries. For 32-bit windows you can install
58 mingw32 using your package manager and it will be added to your path
59 automatically. For 64-bit you need to download the 64 bit mingw from
60 http://sourceforge.net/projects/mingw-w64. Grab a copy of the
61 complete toolchain and unpack it somewhere. Put the bin directory of
62 the toolchain in your path. The mingw installs contain cross compile
63 versions of gcc that are named with a prefix to indicate what they are
64 targetting and you must tell the Makefile which one to use. This
65 should either be i586-mingw32msvc or x86_64-pc-mingw32 depending on
66 which on you are targetting and there should be a version of gcc in
67 your path named i586-mingw32msvc-gcc or x86_64-pc-mingw32-gcc. Tell
68 the makefile what prefix to use to find the mingw tools by using
69 MINGW=. For example:
71 make MINGW=i586-mingw32msvc BINTUILS=build/binutils-2.19.1
73 will build the Win32 cross compiled version of hsdis based on 2.19.1.
75 * Installing
77 Products are named like build/$OS-$LIBARCH/hsdis-$LIBARCH.so. You can
78 install them on your LD_LIBRARY_PATH, or inside of your JRE/JDK. The
79 search path in the JVM is:
81 1. <home>/jre/lib/<arch>/<vm>/libhsdis-<arch>.so
82 2. <home>/jre/lib/<arch>/<vm>/hsdis-<arch>.so
83 3. <home>/jre/lib/<arch>/hsdis-<arch>.so
84 4. hsdis-<arch>.so (using LD_LIBRARY_PATH)
86 Note that there's a bug in hotspot versions prior to hs22 that causes
87 steps 2 and 3 to fail when used with JDK7.
89 Now test:
91 export LD_LIBRARY_PATH .../hsdis/build/$OS-$LIBARCH:$LD_LIBRARY_PATH
92 dargs='-XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly'
93 dargs=$dargs' -XX:PrintAssemblyOptions=hsdis-print-bytes'
94 java $dargs -Xbatch CompileCommand=print,*String.hashCode HelloWorld
96 If the product mode of the JVM does not accept -XX:+PrintAssembly,
97 you do not have a version new enough to use the hsdis plugin.