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25 
26 /**
27  * @test
28  *
29  * @requires os.arch == "aarch64" & vm.compiler2.enabled & os.family == "linux"
30  * @summary Verify VM SVE checking behavior
31  * @library /test/lib
32  * @requires vm.flagless
33  *
34  * @run main/othervm/native compiler.c2.aarch64.TestSVEWithJNI
35  */
36 
37 package compiler.c2.aarch64;
38 
39 import java.util.ArrayList;
40 import java.util.Collections;
41 import java.util.List;
42 import jdk.test.lib.process.ProcessTools;
43 import jdk.test.lib.process.OutputAnalyzer;
44 
45 public class TestSVEWithJNI {
46     static {
47         System.loadLibrary("TestSVEWithJNI");
48     }
49 
50     static final int EXIT_CODE = 99;
51     // Returns a nonnegative on success, or a negative value on error.
setVectorLength(int arg)52     public static native int setVectorLength(int arg);
53     // Returns a nonnegative value on success, or a negative value on error.
getVectorLength()54     public static native int getVectorLength();
55 
56     public static final String MSG = "Current Vector Size: ";
testNormal()57     public static void testNormal() {
58         int vlen = getVectorLength();
59         System.out.println(MSG + vlen);
60         // Should be fine if no vector length changed.
61         if (setVectorLength(vlen) < 0) {
62             throw new Error("Error in setting vector length.");
63         }
64     }
65 
testAbort()66     public static void testAbort() {
67         int vlen = getVectorLength();
68         if (vlen <= 16) {
69             throw new Error("Error: unsupported vector length.");
70         }
71         if (setVectorLength(16) < 0) {
72             throw new Error("Error: setting vector length failed.");
73         }
74     }
75 
createProcessBuilder(String [] args, String mode)76     public static ProcessBuilder createProcessBuilder(String [] args, String mode) {
77         List<String> vmopts = new ArrayList<>();
78         String testjdkPath = System.getProperty("test.jdk");
79         Collections.addAll(vmopts, "-Dtest.jdk=" + testjdkPath);
80         Collections.addAll(vmopts, args);
81         Collections.addAll(vmopts, TestSVEWithJNI.class.getName(), mode);
82         return ProcessTools.createJavaProcessBuilder(vmopts.toArray(new String[vmopts.size()]));
83     }
84 
main(String [] args)85     public static void main(String [] args) throws Exception {
86         if (args.length == 0) {
87             int vlen = getVectorLength();
88             if (vlen < 0) {
89                 return;
90             }
91             String [][] testOpts = {
92                 {"-Xint", "-XX:UseSVE=1"},
93                 {"-Xcomp", "-XX:UseSVE=1"},
94             };
95             ProcessBuilder pb;
96             OutputAnalyzer output;
97             for (String [] opts : testOpts) {
98                 pb = createProcessBuilder(opts, "normal");
99                 output = new OutputAnalyzer(pb.start());
100                 output.shouldHaveExitValue(EXIT_CODE);
101 
102                 pb = createProcessBuilder(opts, "abort");
103                 output = new OutputAnalyzer(pb.start());
104                 output.shouldNotHaveExitValue(EXIT_CODE);
105                 output.shouldMatch("(error|Error|ERROR)");
106             }
107 
108             // Verify MaxVectorSize
109 
110             // Any SVE architecture should support 128-bit vector size.
111             pb = createProcessBuilder(new String []{"-XX:UseSVE=1", "-XX:MaxVectorSize=16"}, "normal");
112             output = new OutputAnalyzer(pb.start());
113             output.shouldHaveExitValue(EXIT_CODE);
114             output.shouldContain(MSG + 16);
115 
116             // An unsupported large vector size value.
117             pb = createProcessBuilder(new String []{"-XX:UseSVE=1", "-XX:MaxVectorSize=512"}, "normal");
118             output = new OutputAnalyzer(pb.start());
119             output.shouldHaveExitValue(EXIT_CODE);
120             output.shouldContain("warning");
121         } else if (args[0].equals("normal")) {
122             testNormal();
123             System.exit(EXIT_CODE);
124         } else if (args[0].equals("abort")) {
125             testAbort();
126             System.exit(EXIT_CODE);
127         }
128     }
129 }
130