# HG changeset patch
# User dtitov
# Date 1560450110 25200
# Node ID 2f4e214781a1d597ed36bf5a36f20928c6c82996
# Parent  2c47220ce9bb34e19c4ee1ab6e43dadffa28d29f
8225543: Jcmd fails to attach to the Java process on Linux using the main class name if whitespace options were used to launch the process
Reviewed-by: sspitsyn, dholmes

diff -r 2c47220ce9bb -r 2f4e214781a1 src/jdk.jcmd/linux/classes/sun/tools/ProcessHelper.java
--- a/src/jdk.jcmd/linux/classes/sun/tools/ProcessHelper.java	Thu Jun 13 19:37:49 2019 +0200
+++ b/src/jdk.jcmd/linux/classes/sun/tools/ProcessHelper.java	Thu Jun 13 11:21:50 2019 -0700
@@ -66,7 +66,7 @@
         if (cmdLine.startsWith(CMD_PREFIX)) {
             cmdLine = cmdLine.substring(CMD_PREFIX.length());
         }
-        String[] parts = cmdLine.split(" ");
+        String[] parts = cmdLine.split("\0");
         String mainClass = null;
 
         if(parts.length == 0) {
@@ -87,7 +87,7 @@
         // options are used then just return the value (the path to the jar file or module
         // name with a main class). Otherwise, the main class name is the first part that
         // is not a Java option (doesn't start with '-' and is not a classpath or a module
-        // path).
+        // whitespace option).
 
         for (int i = 1; i < parts.length && mainClass == null; i++) {
             if (i < parts.length - 1) {
@@ -95,10 +95,15 @@
                     return parts[i + 1];
                 }
             }
-            // If this is a classpath or a module path option then skip the next part
-            // (the classpath or the module path itself)
+
+            if (parts[i].startsWith("--module=")) {
+                return parts[i].substring("--module=".length());
+            }
+
+            // If this is a classpath or a module whitespace option then skip the next part
+            // (the classpath or the option value itself)
             if (parts[i].equals("-cp") || parts[i].equals("-classpath") ||  parts[i].equals("--class-path") ||
-                    parts[i].equals("-p") || parts[i].equals("--module-path")) {
+                    isModuleWhiteSpaceOption(parts[i])) {
                 i++;
                 continue;
             }
@@ -106,6 +111,12 @@
             if (parts[i].startsWith("-")) {
                 continue;
             }
+
+            // If it is a source-file mode then return null
+            if (parts[i].endsWith(".java")) {
+                return null;
+            }
+
             mainClass = parts[i];
         }
         return mainClass;
@@ -115,11 +126,24 @@
     private static String getCommandLine(String pid) {
         try (Stream<String> lines =
                      Files.lines(Paths.get("/proc/" + pid + "/cmdline"))) {
-            return lines.map(x -> x.replaceAll("\0", " ")).findFirst().orElse(null);
+            return lines.findFirst().orElse(null);
         } catch (IOException | UncheckedIOException e) {
             return null;
         }
     }
+
+    private static boolean isModuleWhiteSpaceOption(String option) {
+        return option.equals("-p") ||
+                option.equals("--module-path") ||
+                option.equals("--upgrade-module-path") ||
+                option.equals("--add-modules") ||
+                option.equals("--limit-modules") ||
+                option.equals("--add-exports") ||
+                option.equals("--add-opens") ||
+                option.equals("--add-reads") ||
+                option.equals("--patch-module");
+    }
+
 }
 
 
diff -r 2c47220ce9bb -r 2f4e214781a1 test/jdk/sun/tools/jcmd/TestProcessHelper.java
--- a/test/jdk/sun/tools/jcmd/TestProcessHelper.java	Thu Jun 13 19:37:49 2019 +0200
+++ b/test/jdk/sun/tools/jcmd/TestProcessHelper.java	Thu Jun 13 11:21:50 2019 -0700
@@ -73,13 +73,21 @@
             .resolve(TEST_PROCESS_MAIN_CLASS_NAME + ".class");
 
     private static final String[] CP_OPTIONS = {"-cp", "-classpath", "--class-path"};
-    private static final String[][] VM_ARGS = {{}, {"-Dtest1=aaa"}, {"-Dtest1=aaa", "-Dtest2=bbb"}};
+    private static final String[][] VM_ARGS = {{}, {"-Dtest1=aaa"}, {"-Dtest1=aaa", "-Dtest2=bbb ccc"}};
     private static final String[][] ARGS = {{}, {"param1"}, {"param1", "param2"}};
     private static final String[] MP_OPTIONS = {"-p", "--module-path"};
-    private static final String[] MODULE_OPTIONS = {"-m", "--module"};
+    private static final String[] MODULE_OPTIONS = {"-m", "--module", "--module="};
     private static final String JAR_OPTION = "-jar";
     private static final String MODULE_NAME = "module1";
+    private static final String[][] EXTRA_MODULAR_OPTIONS = {null,
+            {"--add-opens", "java.base/java.net=ALL-UNNAMED"},
+            {"--add-exports", "java.base/java.net=ALL-UNNAMED"},
+            {"--add-reads", "java.base/java.net=ALL-UNNAMED"},
+            {"--add-modules", "java.management"},
+            {"--limit-modules", "java.management"},
+            {"--upgrade-module-path", "test"}};
 
+    private static final String[] PATCH_MODULE_OPTIONS = {"--patch-module", null};
 
     public static void main(String[] args) throws Exception {
         new TestProcessHelper().runTests();
@@ -97,18 +105,24 @@
         for (String cp : CP_OPTIONS) {
             for (String[] vma : VM_ARGS) {
                 for (String[] arg : ARGS) {
-                    List<String> cmd = new LinkedList<>();
-                    cmd.add(JAVA_PATH);
-                    cmd.add(cp);
-                    cmd.add(TEST_CLASSES.toAbsolutePath().toString());
-                    for (String v : vma) {
-                        cmd.add(v);
+                    for (String[] modularOptions : EXTRA_MODULAR_OPTIONS) {
+                        List<String> cmd = new LinkedList<>();
+                        cmd.add(JAVA_PATH);
+                        cmd.add(cp);
+                        cmd.add(TEST_CLASSES.toAbsolutePath().toString());
+                        for (String v : vma) {
+                            cmd.add(v);
+                        }
+                        if (modularOptions != null) {
+                            cmd.add(modularOptions[0]);
+                            cmd.add(modularOptions[1]);
+                        }
+                        cmd.add(TEST_PROCESS_MAIN_CLASS);
+                        for (String a : arg) {
+                            cmd.add(a);
+                        }
+                        testProcessHelper(cmd, TEST_PROCESS_MAIN_CLASS);
                     }
-                    cmd.add(TEST_PROCESS_MAIN_CLASS);
-                    for (String a : arg) {
-                        cmd.add(a);
-                    }
-                    testProcessHelper(cmd, TEST_PROCESS_MAIN_CLASS);
                 }
             }
         }
@@ -144,19 +158,29 @@
             for (String m : MODULE_OPTIONS) {
                 for (String[] vma : VM_ARGS) {
                     for (String[] arg : ARGS) {
-                        List<String> cmd = new LinkedList<>();
-                        cmd.add(JAVA_PATH);
-                        cmd.add(mp);
-                        cmd.add(TEST_MODULES.toAbsolutePath().toString());
-                        for (String v : vma) {
-                            cmd.add(v);
+                        for(String patchModuleOption : PATCH_MODULE_OPTIONS) {
+                            List<String> cmd = new LinkedList<>();
+                            cmd.add(JAVA_PATH);
+                            cmd.add(mp);
+                            cmd.add(TEST_MODULES.toAbsolutePath().toString());
+                            if (patchModuleOption != null) {
+                                cmd.add(patchModuleOption);
+                                cmd.add(MODULE_NAME + "=" + TEST_MODULES.toAbsolutePath().toString());
+                            }
+                            for (String v : vma) {
+                                cmd.add(v);
+                            }
+                            if (m.endsWith("=")) {
+                                cmd.add(m + MODULE_NAME + "/" + TEST_PROCESS_MAIN_CLASS);
+                            } else {
+                                cmd.add(m);
+                                cmd.add(MODULE_NAME + "/" + TEST_PROCESS_MAIN_CLASS);
+                            }
+                            for (String a : arg) {
+                                cmd.add(a);
+                            }
+                            testProcessHelper(cmd, MODULE_NAME + "/" + TEST_PROCESS_MAIN_CLASS);
                         }
-                        cmd.add(m);
-                        cmd.add(MODULE_NAME + "/" + TEST_PROCESS_MAIN_CLASS);
-                        for (String a : arg) {
-                            cmd.add(a);
-                        }
-                        testProcessHelper(cmd, MODULE_NAME + "/" + TEST_PROCESS_MAIN_CLASS);
                     }
                 }
             }