--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os/solaris/launcher/java_md.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1828 @@
+/*
+ * Copyright 1998-2005 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+/*
+ * Gamma (Hotspot internal engineering test) launcher based on 1.6.0-b28 JDK,
+ * search "GAMMA" for gamma specific changes.
+ */
+
+#include "java.h"
+#include <dirent.h>
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#ifndef GAMMA
+#include "manifest_info.h"
+#include "version_comp.h"
+#endif
+
+#define JVM_DLL "libjvm.so"
+#define JAVA_DLL "libjava.so"
+
+#ifndef GAMMA   /* launcher.make defines ARCH */
+
+/*
+ * If a processor / os combination has the ability to run binaries of
+ * two data models and cohabitation of jre/jdk bits with both data
+ * models is supported, then DUAL_MODE is defined.  When DUAL_MODE is
+ * defined, the architecture names for the narrow and wide version of
+ * the architecture are defined in BIG_ARCH and SMALL_ARCH.  Currently
+ * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
+ * i586/amd64 could be defined as DUAL_MODE but that is not the
+ * current policy.
+ */
+
+#ifdef _LP64
+
+#  ifdef ia64
+#    define ARCH "ia64"
+#  elif defined(amd64)
+#    define ARCH "amd64"
+#  elif defined(__sparc)
+#    define ARCH "sparcv9"
+#  else
+#    define ARCH "unknown" /* unknown 64-bit architecture */
+#  endif
+
+#else /* 32-bit data model */
+
+#  ifdef i586
+#    define ARCH "i386"
+#  elif defined(__sparc)
+#    define ARCH "sparc"
+#  endif
+
+#endif /* _LP64 */
+
+#ifdef __sun
+#  define DUAL_MODE
+#  ifdef __sparc
+#    define BIG_ARCH "sparcv9"
+#    define SMALL_ARCH "sparc"
+#  else
+#    define BIG_ARCH "amd64"
+#    define SMALL_ARCH "i386"
+#  endif
+#  include <sys/systeminfo.h>
+#  include <sys/elf.h>
+#  include <stdio.h>
+#else
+#  ifndef ARCH
+#    include <sys/systeminfo.h>
+#  endif
+#endif
+
+#endif /* ifndef GAMMA */
+
+/* pointer to environment */
+extern char **environ;
+
+#ifndef GAMMA
+
+/*
+ *      A collection of useful strings. One should think of these as #define
+ *      entries, but actual strings can be more efficient (with many compilers).
+ */
+#ifdef __linux__
+static const char *system_dir   = "/usr/java";
+static const char *user_dir     = "/java";
+#else /* Solaris */
+static const char *system_dir   = "/usr/jdk";
+static const char *user_dir     = "/jdk";
+#endif
+
+#endif  /* ifndef GAMMA */
+
+/*
+ * Flowchart of launcher execs and options processing on unix
+ *
+ * The selection of the proper vm shared library to open depends on
+ * several classes of command line options, including vm "flavor"
+ * options (-client, -server) and the data model options, -d32  and
+ * -d64, as well as a version specification which may have come from
+ * the command line or from the manifest of an executable jar file.
+ * The vm selection options are not passed to the running
+ * virtual machine; they must be screened out by the launcher.
+ *
+ * The version specification (if any) is processed first by the
+ * platform independent routine SelectVersion.  This may result in
+ * the exec of the specified launcher version.
+ *
+ * Typically, the launcher execs at least once to ensure a suitable
+ * LD_LIBRARY_PATH is in effect for the process.  The first exec
+ * screens out all the data model options; leaving the choice of data
+ * model implicit in the binary selected to run.  However, in case no
+ * exec is done, the data model options are screened out before the vm
+ * is invoked.
+ *
+ *  incoming argv ------------------------------
+ *  |                                          |
+ * \|/                                         |
+ * CheckJVMType                                |
+ * (removes -client, -server, etc.)            |
+ *                                            \|/
+ *                                            CreateExecutionEnvironment
+ *                                            (removes -d32 and -d64,
+ *                                             determines desired data model,
+ *                                             sets up LD_LIBRARY_PATH,
+ *                                             and exec's)
+ *                                             |
+ *  --------------------------------------------
+ *  |
+ * \|/
+ * exec child 1 incoming argv -----------------
+ *  |                                          |
+ * \|/                                         |
+ * CheckJVMType                                |
+ * (removes -client, -server, etc.)            |
+ *  |                                         \|/
+ *  |                                          CreateExecutionEnvironment
+ *  |                                          (verifies desired data model
+ *  |                                           is running and acceptable
+ *  |                                           LD_LIBRARY_PATH;
+ *  |                                           no-op in child)
+ *  |
+ * \|/
+ * TranslateDashJArgs...
+ * (Prepare to pass args to vm)
+ *  |
+ *  |
+ *  |
+ * \|/
+ * ParseArguments
+ * (ignores -d32 and -d64,
+ *  processes version options,
+ *  creates argument list for vm,
+ *  etc.)
+ *
+ */
+
+static char *SetExecname(char **argv);
+static char * GetExecname();
+static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
+                           char *jvmpath, jint jvmpathsize, char * arch);
+static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
+
+const char *
+GetArch()
+{
+    static char *arch = NULL;
+    static char buf[12];
+    if (arch) {
+        return arch;
+    }
+
+#ifdef ARCH
+    strcpy(buf, ARCH);
+#else
+    sysinfo(SI_ARCHITECTURE, buf, sizeof(buf));
+#endif
+    arch = buf;
+    return arch;
+}
+
+void
+CreateExecutionEnvironment(int *_argcp,
+                           char ***_argvp,
+                           char jrepath[],
+                           jint so_jrepath,
+                           char jvmpath[],
+                           jint so_jvmpath,
+                           char **original_argv) {
+  /*
+   * First, determine if we are running the desired data model.  If we
+   * are running the desired data model, all the error messages
+   * associated with calling GetJREPath, ReadKnownVMs, etc. should be
+   * output.  However, if we are not running the desired data model,
+   * some of the errors should be suppressed since it is more
+   * informative to issue an error message based on whether or not the
+   * os/processor combination has dual mode capabilities.
+   */
+
+    char *execname = NULL;
+    int original_argc = *_argcp;
+    jboolean jvmpathExists;
+
+    /* Compute the name of the executable */
+    execname = SetExecname(*_argvp);
+
+#ifndef GAMMA
+    /* Set the LD_LIBRARY_PATH environment variable, check data model
+       flags, and exec process, if needed */
+    {
+      char *arch        = (char *)GetArch(); /* like sparc or sparcv9 */
+      char * jvmtype    = NULL;
+      int argc          = *_argcp;
+      char **argv       = original_argv;
+
+      char *runpath     = NULL; /* existing effective LD_LIBRARY_PATH
+                                   setting */
+
+      int running       =       /* What data model is being ILP32 =>
+                                   32 bit vm; LP64 => 64 bit vm */
+#ifdef _LP64
+        64;
+#else
+      32;
+#endif
+
+      int wanted        = running;      /* What data mode is being
+                                           asked for? Current model is
+                                           fine unless another model
+                                           is asked for */
+
+      char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
+      char* newpath     = NULL; /* path on new LD_LIBRARY_PATH */
+      char* lastslash   = NULL;
+
+      char** newenvp    = NULL; /* current environment */
+
+      char** newargv    = NULL;
+      int    newargc    = 0;
+#ifdef __sun
+      char*  dmpath     = NULL;  /* data model specific LD_LIBRARY_PATH,
+                                    Solaris only */
+#endif
+
+      /*
+       * Starting in 1.5, all unix platforms accept the -d32 and -d64
+       * options.  On platforms where only one data-model is supported
+       * (e.g. ia-64 Linux), using the flag for the other data model is
+       * an error and will terminate the program.
+       */
+
+      { /* open new scope to declare local variables */
+        int i;
+
+        newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv));
+        newargv[newargc++] = argv[0];
+
+        /* scan for data model arguments and remove from argument list;
+           last occurrence determines desired data model */
+        for (i=1; i < argc; i++) {
+
+          if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
+            wanted = 64;
+            continue;
+          }
+          if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
+            wanted = 32;
+            continue;
+          }
+          newargv[newargc++] = argv[i];
+
+#ifdef JAVA_ARGS
+          if (argv[i][0] != '-')
+            continue;
+#else
+          if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
+            i++;
+            if (i >= argc) break;
+            newargv[newargc++] = argv[i];
+            continue;
+          }
+          if (argv[i][0] != '-') { i++; break; }
+#endif
+        }
+
+        /* copy rest of args [i .. argc) */
+        while (i < argc) {
+          newargv[newargc++] = argv[i++];
+        }
+        newargv[newargc] = NULL;
+
+        /*
+         * newargv has all proper arguments here
+         */
+
+        argc = newargc;
+        argv = newargv;
+      }
+
+      /* If the data model is not changing, it is an error if the
+         jvmpath does not exist */
+      if (wanted == running) {
+        /* Find out where the JRE is that we will be using. */
+        if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
+          fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
+          exit(2);
+        }
+
+        /* Find the specified JVM type */
+        if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
+          fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
+          exit(1);
+        }
+
+        jvmpath[0] = '\0';
+        jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
+
+        if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
+          fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
+          exit(4);
+        }
+      } else {  /* do the same speculatively or exit */
+#ifdef DUAL_MODE
+        if (running != wanted) {
+          /* Find out where the JRE is that we will be using. */
+          if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) {
+            goto EndDataModelSpeculate;
+          }
+
+          /*
+           * Read in jvm.cfg for target data model and process vm
+           * selection options.
+           */
+          if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) {
+            goto EndDataModelSpeculate;
+          }
+          jvmpath[0] = '\0';
+          jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
+          /* exec child can do error checking on the existence of the path */
+          jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
+                                     ((wanted==64)?BIG_ARCH:SMALL_ARCH));
+
+        }
+      EndDataModelSpeculate: /* give up and let other code report error message */
+        ;
+#else
+        fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
+        exit(1);
+#endif
+      }
+
+      /*
+       * We will set the LD_LIBRARY_PATH as follows:
+       *
+       *     o          $JVMPATH (directory portion only)
+       *     o          $JRE/lib/$ARCH
+       *     o          $JRE/../lib/$ARCH
+       *
+       * followed by the user's previous effective LD_LIBRARY_PATH, if
+       * any.
+       */
+
+#ifdef __sun
+      /*
+       * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
+       * variables:
+       *
+       * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
+       * data-model specific variables are not set.
+       *
+       * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
+       * for 64-bit binaries.
+       *
+       * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
+       * for 32-bit binaries.
+       *
+       * The vm uses LD_LIBRARY_PATH to set the java.library.path system
+       * property.  To shield the vm from the complication of multiple
+       * LD_LIBRARY_PATH variables, if the appropriate data model
+       * specific variable is set, we will act as if LD_LIBRARY_PATH had
+       * the value of the data model specific variant and the data model
+       * specific variant will be unset.  Note that the variable for the
+       * *wanted* data model must be used (if it is set), not simply the
+       * current running data model.
+       */
+
+      switch(wanted) {
+      case 0:
+        if(running == 32) {
+          dmpath = getenv("LD_LIBRARY_PATH_32");
+          wanted = 32;
+        }
+        else {
+          dmpath = getenv("LD_LIBRARY_PATH_64");
+          wanted = 64;
+        }
+        break;
+
+      case 32:
+        dmpath = getenv("LD_LIBRARY_PATH_32");
+        break;
+
+      case 64:
+        dmpath = getenv("LD_LIBRARY_PATH_64");
+        break;
+
+      default:
+        fprintf(stderr, "Improper value at line %d.", __LINE__);
+        exit(1); /* unknown value in wanted */
+        break;
+      }
+
+      /*
+       * If dmpath is NULL, the relevant data model specific variable is
+       * not set and normal LD_LIBRARY_PATH should be used.
+       */
+      if( dmpath == NULL) {
+        runpath = getenv("LD_LIBRARY_PATH");
+      }
+      else {
+        runpath = dmpath;
+      }
+#else
+      /*
+       * If not on Solaris, assume only a single LD_LIBRARY_PATH
+       * variable.
+       */
+      runpath = getenv("LD_LIBRARY_PATH");
+#endif /* __sun */
+
+#ifdef __linux
+      /*
+       * On linux, if a binary is running as sgid or suid, glibc sets
+       * LD_LIBRARY_PATH to the empty string for security purposes.  (In
+       * contrast, on Solaris the LD_LIBRARY_PATH variable for a
+       * privileged binary does not lose its settings; but the dynamic
+       * linker does apply more scrutiny to the path.) The launcher uses
+       * the value of LD_LIBRARY_PATH to prevent an exec loop.
+       * Therefore, if we are running sgid or suid, this function's
+       * setting of LD_LIBRARY_PATH will be ineffective and we should
+       * return from the function now.  Getting the right libraries to
+       * be found must be handled through other mechanisms.
+       */
+      if((getgid() != getegid()) || (getuid() != geteuid()) ) {
+        return;
+      }
+#endif
+
+      /* runpath contains current effective LD_LIBRARY_PATH setting */
+
+      jvmpath = strdup(jvmpath);
+      new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
+                              2*strlen(jrepath) + 2*strlen(arch) +
+                              strlen(jvmpath) + 52);
+      newpath = new_runpath + strlen("LD_LIBRARY_PATH=");
+
+
+      /*
+       * Create desired LD_LIBRARY_PATH value for target data model.
+       */
+      {
+        /* remove the name of the .so from the JVM path */
+        lastslash = strrchr(jvmpath, '/');
+        if (lastslash)
+          *lastslash = '\0';
+
+
+        /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */
+
+        sprintf(new_runpath, "LD_LIBRARY_PATH="
+                "%s:"
+                "%s/lib/%s:"
+                "%s/../lib/%s",
+                jvmpath,
+#ifdef DUAL_MODE
+                jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH),
+                jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH)
+#else
+                jrepath, arch,
+                jrepath, arch
+#endif
+                );
+
+
+        /*
+         * Check to make sure that the prefix of the current path is the
+         * desired environment variable setting.
+         */
+        if (runpath != NULL &&
+            strncmp(newpath, runpath, strlen(newpath))==0 &&
+            (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
+            (running == wanted) /* data model does not have to be changed */
+#ifdef __sun
+            && (dmpath == NULL)    /* data model specific variables not set  */
+#endif
+            ) {
+
+          return;
+
+        }
+      }
+
+      /*
+       * Place the desired environment setting onto the prefix of
+       * LD_LIBRARY_PATH.  Note that this prevents any possible infinite
+       * loop of execv() because we test for the prefix, above.
+       */
+      if (runpath != 0) {
+        strcat(new_runpath, ":");
+        strcat(new_runpath, runpath);
+      }
+
+      if( putenv(new_runpath) != 0) {
+        exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
+                    properly */
+      }
+
+      /*
+       * Unix systems document that they look at LD_LIBRARY_PATH only
+       * once at startup, so we have to re-exec the current executable
+       * to get the changed environment variable to have an effect.
+       */
+
+#ifdef __sun
+      /*
+       * If dmpath is not NULL, remove the data model specific string
+       * in the environment for the exec'ed child.
+       */
+
+      if( dmpath != NULL)
+        (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
+#endif
+
+      newenvp = environ;
+
+      {
+        char *newexec = execname;
+#ifdef DUAL_MODE
+        /*
+         * If the data model is being changed, the path to the
+         * executable must be updated accordingly; the executable name
+         * and directory the executable resides in are separate.  In the
+         * case of 32 => 64, the new bits are assumed to reside in, e.g.
+         * "olddir/BIGARCH/execname"; in the case of 64 => 32,
+         * the bits are assumed to be in "olddir/../execname".  For example,
+         *
+         * olddir/sparcv9/execname
+         * olddir/amd64/execname
+         *
+         * for Solaris SPARC and Linux amd64, respectively.
+         */
+
+        if (running != wanted) {
+          char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname);
+          char *olddir = oldexec;
+          char *oldbase = strrchr(oldexec, '/');
+
+
+          newexec = MemAlloc(strlen(execname) + 20);
+          *oldbase++ = 0;
+          sprintf(newexec, "%s/%s/%s", olddir,
+                  ((wanted==64) ? BIG_ARCH : ".."), oldbase);
+          argv[0] = newexec;
+        }
+#endif
+
+        execve(newexec, argv, newenvp);
+        perror("execve()");
+
+        fprintf(stderr, "Error trying to exec %s.\n", newexec);
+        fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
+
+#ifdef DUAL_MODE
+        if (running != wanted) {
+          fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
+                  wanted, running);
+#  ifdef __sun
+
+#    ifdef __sparc
+          fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
+          fprintf(stderr,
+                  "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
+#    else
+          fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
+          fprintf(stderr, "or the 64-bit components have not been installed.\n");
+#    endif
+        }
+#  endif
+#endif
+
+      }
+
+      exit(1);
+    }
+
+#else  /* ifndef GAMMA */
+
+  /* gamma launcher is simpler in that it doesn't handle VM flavors, data  */
+  /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly  */
+  /* all we need to do here is to return correct path names. See also      */
+  /* GetJVMPath() and GetApplicationHome().                                */
+
+  { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
+    char *p;
+
+    if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
+      fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
+      exit(2);
+    }
+
+    if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
+      fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
+      exit(4);
+    }
+  }
+
+#endif  /* ifndef GAMMA */
+}
+
+
+/*
+ * On Solaris VM choosing is done by the launcher (java.c).
+ */
+static jboolean
+GetJVMPath(const char *jrepath, const char *jvmtype,
+           char *jvmpath, jint jvmpathsize, char * arch)
+{
+    struct stat s;
+
+#ifndef GAMMA
+    if (strchr(jvmtype, '/')) {
+        sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
+    } else {
+        sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
+    }
+#else
+    /* For gamma launcher, JVM is either built-in or in the same directory. */
+    /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the  */
+    /* directory where gamma launcher is located.                           */
+
+    char *p;
+
+    snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
+    p = strrchr(jvmpath, '/');
+    if (p) {
+       /* replace executable name with libjvm.so */
+       snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
+    } else {
+       /* this case shouldn't happen */
+       snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
+    }
+#endif
+
+    if (_launcher_debug)
+      printf("Does `%s' exist ... ", jvmpath);
+
+    if (stat(jvmpath, &s) == 0) {
+        if (_launcher_debug)
+          printf("yes.\n");
+        return JNI_TRUE;
+    } else {
+        if (_launcher_debug)
+          printf("no.\n");
+        return JNI_FALSE;
+    }
+}
+
+/*
+ * Find path to JRE based on .exe's location or registry settings.
+ */
+static jboolean
+GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
+{
+    char libjava[MAXPATHLEN];
+
+    if (GetApplicationHome(path, pathsize)) {
+        /* Is JRE co-located with the application? */
+        sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch);
+        if (access(libjava, F_OK) == 0) {
+            goto found;
+        }
+
+        /* Does the app ship a private JRE in <apphome>/jre directory? */
+        sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch);
+        if (access(libjava, F_OK) == 0) {
+            strcat(path, "/jre");
+            goto found;
+        }
+    }
+
+    if (!speculative)
+      fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
+    return JNI_FALSE;
+
+ found:
+    if (_launcher_debug)
+      printf("JRE path is %s\n", path);
+    return JNI_TRUE;
+}
+
+jboolean
+LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
+{
+#ifdef GAMMA
+    /* JVM is directly linked with gamma launcher; no dlopen() */
+    ifn->CreateJavaVM = JNI_CreateJavaVM;
+    ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs;
+    return JNI_TRUE;
+#else
+    Dl_info dlinfo;
+    void *libjvm;
+
+    if (_launcher_debug) {
+        printf("JVM path is %s\n", jvmpath);
+    }
+
+    libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
+    if (libjvm == NULL) {
+#if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
+      FILE * fp;
+      Elf32_Ehdr elf_head;
+      int count;
+      int location;
+
+      fp = fopen(jvmpath, "r");
+      if(fp == NULL)
+        goto error;
+
+      /* read in elf header */
+      count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
+      fclose(fp);
+      if(count < 1)
+        goto error;
+
+      /*
+       * Check for running a server vm (compiled with -xarch=v8plus)
+       * on a stock v8 processor.  In this case, the machine type in
+       * the elf header would not be included the architecture list
+       * provided by the isalist command, which is turn is gotten from
+       * sysinfo.  This case cannot occur on 64-bit hardware and thus
+       * does not have to be checked for in binaries with an LP64 data
+       * model.
+       */
+      if(elf_head.e_machine == EM_SPARC32PLUS) {
+        char buf[257];  /* recommended buffer size from sysinfo man
+                           page */
+        long length;
+        char* location;
+
+        length = sysinfo(SI_ISALIST, buf, 257);
+        if(length > 0) {
+          location = strstr(buf, "sparcv8plus ");
+          if(location == NULL) {
+            fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n");
+            fprintf(stderr, "Use Client compiler on V8 processors.\n");
+            fprintf(stderr, "Could not create the Java virtual machine.\n");
+            return JNI_FALSE;
+          }
+        }
+      }
+#endif
+      fprintf(stderr, "dl failure on line %d", __LINE__);
+      goto error;
+    }
+
+    ifn->CreateJavaVM = (CreateJavaVM_t)
+      dlsym(libjvm, "JNI_CreateJavaVM");
+    if (ifn->CreateJavaVM == NULL)
+        goto error;
+
+    ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
+        dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
+    if (ifn->GetDefaultJavaVMInitArgs == NULL)
+      goto error;
+
+    return JNI_TRUE;
+
+error:
+    fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
+    return JNI_FALSE;
+#endif /* GAMMA */
+}
+
+/*
+ * Get the path to the file that has the usage message for -X options.
+ */
+void
+GetXUsagePath(char *buf, jint bufsize)
+{
+    static const char Xusage_txt[] = "/Xusage.txt";
+    Dl_info dlinfo;
+
+    /* we use RTLD_NOW because of problems with ld.so.1 and green threads */
+    dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo);
+    strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt));
+
+    buf[bufsize-1] = '\0';
+    strcpy(strrchr(buf, '/'), Xusage_txt);
+}
+
+/*
+ * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
+ * "/foo" into buf.
+ */
+jboolean
+GetApplicationHome(char *buf, jint bufsize)
+{
+#ifdef __linux__
+    char *execname = GetExecname();
+    if (execname) {
+        strncpy(buf, execname, bufsize-1);
+        buf[bufsize-1] = '\0';
+    } else {
+        return JNI_FALSE;
+    }
+#else
+    Dl_info dlinfo;
+
+    dladdr((void *)GetApplicationHome, &dlinfo);
+    if (realpath(dlinfo.dli_fname, buf) == NULL) {
+        fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
+        return JNI_FALSE;
+    }
+#endif
+
+#ifdef GAMMA
+    {
+      /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */
+      char* java_home_var = getenv("JAVA_HOME");
+      if (java_home_var == NULL) {
+        printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
+        return JNI_FALSE;
+      }
+      snprintf(buf, bufsize, "%s", java_home_var);
+    }
+#else
+    if (strrchr(buf, '/') == 0) {
+        buf[0] = '\0';
+        return JNI_FALSE;
+    }
+    *(strrchr(buf, '/')) = '\0';        /* executable file      */
+    if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
+        buf[0] = '\0';
+        return JNI_FALSE;
+    }
+    if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
+        *(strrchr(buf, '/')) = '\0';    /* sparcv9 or amd64     */
+    if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
+        buf[0] = '\0';
+        return JNI_FALSE;
+    }
+    *(strrchr(buf, '/')) = '\0';        /* bin                  */
+#endif /* GAMMA */
+
+    return JNI_TRUE;
+}
+
+
+/*
+ * Return true if the named program exists
+ */
+static int
+ProgramExists(char *name)
+{
+    struct stat sb;
+    if (stat(name, &sb) != 0) return 0;
+    if (S_ISDIR(sb.st_mode)) return 0;
+    return (sb.st_mode & S_IEXEC) != 0;
+}
+
+
+/*
+ * Find a command in a directory, returning the path.
+ */
+static char *
+Resolve(char *indir, char *cmd)
+{
+    char name[PATH_MAX + 2], *real;
+
+    if ((strlen(indir) + strlen(cmd) + 1)  > PATH_MAX) return 0;
+    sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
+    if (!ProgramExists(name)) return 0;
+    real = MemAlloc(PATH_MAX + 2);
+    if (!realpath(name, real))
+        strcpy(real, name);
+    return real;
+}
+
+
+/*
+ * Find a path for the executable
+ */
+static char *
+FindExecName(char *program)
+{
+    char cwdbuf[PATH_MAX+2];
+    char *path;
+    char *tmp_path;
+    char *f;
+    char *result = NULL;
+
+    /* absolute path? */
+    if (*program == FILE_SEPARATOR ||
+        (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
+        return Resolve("", program+1);
+
+    /* relative path? */
+    if (strrchr(program, FILE_SEPARATOR) != 0) {
+        char buf[PATH_MAX+2];
+        return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
+    }
+
+    /* from search path? */
+    path = getenv("PATH");
+    if (!path || !*path) path = ".";
+    tmp_path = MemAlloc(strlen(path) + 2);
+    strcpy(tmp_path, path);
+
+    for (f=tmp_path; *f && result==0; ) {
+        char *s = f;
+        while (*f && (*f != PATH_SEPARATOR)) ++f;
+        if (*f) *f++ = 0;
+        if (*s == FILE_SEPARATOR)
+            result = Resolve(s, program);
+        else {
+            /* relative path element */
+            char dir[2*PATH_MAX];
+            sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
+                    FILE_SEPARATOR, s);
+            result = Resolve(dir, program);
+        }
+        if (result != 0) break;
+    }
+
+    free(tmp_path);
+    return result;
+}
+
+
+/* Store the name of the executable once computed */
+static char *execname = NULL;
+
+/*
+ * Compute the name of the executable
+ *
+ * In order to re-exec securely we need the absolute path of the
+ * executable. On Solaris getexecname(3c) may not return an absolute
+ * path so we use dladdr to get the filename of the executable and
+ * then use realpath to derive an absolute path. From Solaris 9
+ * onwards the filename returned in DL_info structure from dladdr is
+ * an absolute pathname so technically realpath isn't required.
+ * On Linux we read the executable name from /proc/self/exe.
+ * As a fallback, and for platforms other than Solaris and Linux,
+ * we use FindExecName to compute the executable name.
+ */
+static char *
+SetExecname(char **argv)
+{
+    char* exec_path = NULL;
+
+    if (execname != NULL)       /* Already determined */
+        return (execname);
+
+#if defined(__sun)
+    {
+        Dl_info dlinfo;
+        if (dladdr((void*)&SetExecname, &dlinfo)) {
+            char *resolved = (char*)MemAlloc(PATH_MAX+1);
+            if (resolved != NULL) {
+                exec_path = realpath(dlinfo.dli_fname, resolved);
+                if (exec_path == NULL) {
+                    free(resolved);
+                }
+            }
+        }
+    }
+#elif defined(__linux__)
+    {
+        const char* self = "/proc/self/exe";
+        char buf[PATH_MAX+1];
+        int len = readlink(self, buf, PATH_MAX);
+        if (len >= 0) {
+            buf[len] = '\0';            /* readlink doesn't nul terminate */
+            exec_path = strdup(buf);
+        }
+    }
+#else /* !__sun && !__linux */
+    {
+        /* Not implemented */
+    }
+#endif
+
+    if (exec_path == NULL) {
+        exec_path = FindExecName(argv[0]);
+    }
+    execname = exec_path;
+    return exec_path;
+}
+
+/*
+ * Return the name of the executable.  Used in java_md.c to find the JRE area.
+ */
+static char *
+GetExecname() {
+  return execname;
+}
+
+void ReportErrorMessage(char * message, jboolean always) {
+  if (always) {
+    fprintf(stderr, "%s\n", message);
+  }
+}
+
+void ReportErrorMessage2(char * format, char * string, jboolean always) {
+  if (always) {
+    fprintf(stderr, format, string);
+    fprintf(stderr, "\n");
+  }
+}
+
+void  ReportExceptionDescription(JNIEnv * env) {
+  (*env)->ExceptionDescribe(env);
+}
+
+/*
+ * Return JNI_TRUE for an option string that has no effect but should
+ * _not_ be passed on to the vm; return JNI_FALSE otherwise.  On
+ * Solaris SPARC, this screening needs to be done if:
+ * 1) LD_LIBRARY_PATH does _not_ need to be reset and
+ * 2) -d32 or -d64 is passed to a binary with a matching data model
+ *    (the exec in SetLibraryPath removes -d<n> options and points the
+ *    exec to the proper binary).  When this exec is not done, these options
+ *    would end up getting passed onto the vm.
+ */
+jboolean RemovableMachineDependentOption(char * option) {
+  /*
+   * Unconditionally remove both -d32 and -d64 options since only
+   * the last such options has an effect; e.g.
+   * java -d32 -d64 -d32 -version
+   * is equivalent to
+   * java -d32 -version
+   */
+
+  if( (strcmp(option, "-d32")  == 0 ) ||
+      (strcmp(option, "-d64")  == 0 ))
+    return JNI_TRUE;
+  else
+    return JNI_FALSE;
+}
+
+void PrintMachineDependentOptions() {
+      fprintf(stdout,
+        "    -d32          use a 32-bit data model if available\n"
+        "\n"
+        "    -d64          use a 64-bit data model if available\n");
+      return;
+}
+
+#ifndef GAMMA  /* gamma launcher does not have ergonomics */
+
+/*
+ * The following methods (down to ServerClassMachine()) answer
+ * the question about whether a machine is a "server-class"
+ * machine.  A server-class machine is loosely defined as one
+ * with 2 or more processors and 2 gigabytes or more physical
+ * memory.  The definition of a processor is a physical package,
+ * not a hyperthreaded chip masquerading as a multi-processor.
+ * The definition of memory is also somewhat fuzzy, since x86
+ * machines seem not to report all the memory in their DIMMs, we
+ * think because of memory mapping of graphics cards, etc.
+ *
+ * This code is somewhat more confused with #ifdef's than we'd
+ * like because this file is used by both Solaris and Linux
+ * platforms, and so needs to be parameterized for SPARC and
+ * i586 hardware.  The other Linux platforms (amd64 and ia64)
+ * don't even ask this question, because they only come with
+ * server JVMs.  */
+
+# define KB (1024UL)
+# define MB (1024UL * KB)
+# define GB (1024UL * MB)
+
+/* Compute physical memory by asking the OS */
+uint64_t
+physical_memory(void) {
+  const uint64_t pages     = (uint64_t) sysconf(_SC_PHYS_PAGES);
+  const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
+  const uint64_t result    = pages * page_size;
+# define UINT64_FORMAT "%" PRIu64
+
+  if (_launcher_debug) {
+    printf("pages: " UINT64_FORMAT
+           "  page_size: " UINT64_FORMAT
+           "  physical memory: " UINT64_FORMAT " (%.3fGB)\n",
+           pages, page_size, result, result / (double) GB);
+  }
+  return result;
+}
+
+#if defined(__sun) && defined(__sparc)
+
+/* Methods for solaris-sparc: these are easy. */
+
+/* Ask the OS how many processors there are. */
+unsigned long
+physical_processors(void) {
+  const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
+
+  if (_launcher_debug) {
+    printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
+  }
+  return sys_processors;
+}
+
+/* The solaris-sparc version of the "server-class" predicate. */
+jboolean
+solaris_sparc_ServerClassMachine(void) {
+  jboolean            result            = JNI_FALSE;
+  /* How big is a server class machine? */
+  const unsigned long server_processors = 2UL;
+  const uint64_t      server_memory     = 2UL * GB;
+  const uint64_t      actual_memory     = physical_memory();
+
+  /* Is this a server class machine? */
+  if (actual_memory >= server_memory) {
+    const unsigned long actual_processors = physical_processors();
+    if (actual_processors >= server_processors) {
+      result = JNI_TRUE;
+    }
+  }
+  if (_launcher_debug) {
+    printf("solaris_" ARCH "_ServerClassMachine: %s\n",
+           (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
+  }
+  return result;
+}
+
+#endif /* __sun && __sparc */
+
+#if defined(__sun) && defined(i586)
+
+/*
+ * A utility method for asking the CPU about itself.
+ * There's a corresponding version of linux-i586
+ * because the compilers are different.
+ */
+void
+get_cpuid(uint32_t arg,
+          uint32_t* eaxp,
+          uint32_t* ebxp,
+          uint32_t* ecxp,
+          uint32_t* edxp) {
+#ifdef _LP64
+  asm(
+  /* rbx is a callee-saved register */
+      " movq    %rbx, %r11  \n"
+  /* rdx and rcx are 3rd and 4th argument registers */
+      " movq    %rdx, %r10  \n"
+      " movq    %rcx, %r9   \n"
+      " movl    %edi, %eax  \n"
+      " cpuid               \n"
+      " movl    %eax, (%rsi)\n"
+      " movl    %ebx, (%r10)\n"
+      " movl    %ecx, (%r9) \n"
+      " movl    %edx, (%r8) \n"
+  /* Restore rbx */
+      " movq    %r11, %rbx");
+#else
+  /* EBX is a callee-saved register */
+  asm(" pushl   %ebx");
+  /* Need ESI for storing through arguments */
+  asm(" pushl   %esi");
+  asm(" movl    8(%ebp), %eax   \n"
+      " cpuid                   \n"
+      " movl    12(%ebp), %esi  \n"
+      " movl    %eax, (%esi)    \n"
+      " movl    16(%ebp), %esi  \n"
+      " movl    %ebx, (%esi)    \n"
+      " movl    20(%ebp), %esi  \n"
+      " movl    %ecx, (%esi)    \n"
+      " movl    24(%ebp), %esi  \n"
+      " movl    %edx, (%esi)      ");
+  /* Restore ESI and EBX */
+  asm(" popl    %esi");
+  /* Restore EBX */
+  asm(" popl    %ebx");
+#endif
+}
+
+#endif /* __sun && i586 */
+
+#if defined(__linux__) && defined(i586)
+
+/*
+ * A utility method for asking the CPU about itself.
+ * There's a corresponding version of solaris-i586
+ * because the compilers are different.
+ */
+void
+get_cpuid(uint32_t arg,
+          uint32_t* eaxp,
+          uint32_t* ebxp,
+          uint32_t* ecxp,
+          uint32_t* edxp) {
+#ifdef _LP64
+  __asm__ volatile (/* Instructions */
+                    "   movl    %4, %%eax  \n"
+                    "   cpuid              \n"
+                    "   movl    %%eax, (%0)\n"
+                    "   movl    %%ebx, (%1)\n"
+                    "   movl    %%ecx, (%2)\n"
+                    "   movl    %%edx, (%3)\n"
+                    : /* Outputs */
+                    : /* Inputs */
+                    "r" (eaxp),
+                    "r" (ebxp),
+                    "r" (ecxp),
+                    "r" (edxp),
+                    "r" (arg)
+                    : /* Clobbers */
+                    "%rax", "%rbx", "%rcx", "%rdx", "memory"
+                    );
+#else
+  uint32_t value_of_eax = 0;
+  uint32_t value_of_ebx = 0;
+  uint32_t value_of_ecx = 0;
+  uint32_t value_of_edx = 0;
+  __asm__ volatile (/* Instructions */
+                        /* ebx is callee-save, so push it */
+                        /* even though it's in the clobbers section */
+                    "   pushl   %%ebx      \n"
+                    "   movl    %4, %%eax  \n"
+                    "   cpuid              \n"
+                    "   movl    %%eax, %0  \n"
+                    "   movl    %%ebx, %1  \n"
+                    "   movl    %%ecx, %2  \n"
+                    "   movl    %%edx, %3  \n"
+                        /* restore ebx */
+                    "   popl    %%ebx      \n"
+
+                    : /* Outputs */
+                    "=m" (value_of_eax),
+                    "=m" (value_of_ebx),
+                    "=m" (value_of_ecx),
+                    "=m" (value_of_edx)
+                    : /* Inputs */
+                    "m" (arg)
+                    : /* Clobbers */
+                    "%eax", "%ebx", "%ecx", "%edx"
+                    );
+  *eaxp = value_of_eax;
+  *ebxp = value_of_ebx;
+  *ecxp = value_of_ecx;
+  *edxp = value_of_edx;
+#endif
+}
+
+#endif /* __linux__ && i586 */
+
+#ifdef i586
+/*
+ * Routines shared by solaris-i586 and linux-i586.
+ */
+
+enum HyperThreadingSupport_enum {
+  hts_supported        =  1,
+  hts_too_soon_to_tell =  0,
+  hts_not_supported    = -1,
+  hts_not_pentium4     = -2,
+  hts_not_intel        = -3
+};
+typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
+
+/* Determine if hyperthreading is supported */
+HyperThreadingSupport
+hyperthreading_support(void) {
+  HyperThreadingSupport result = hts_too_soon_to_tell;
+  /* Bits 11 through 8 is family processor id */
+# define FAMILY_ID_SHIFT 8
+# define FAMILY_ID_MASK 0xf
+  /* Bits 23 through 20 is extended family processor id */
+# define EXT_FAMILY_ID_SHIFT 20
+# define EXT_FAMILY_ID_MASK 0xf
+  /* Pentium 4 family processor id */
+# define PENTIUM4_FAMILY_ID 0xf
+  /* Bit 28 indicates Hyper-Threading Technology support */
+# define HT_BIT_SHIFT 28
+# define HT_BIT_MASK 1
+  uint32_t vendor_id[3] = { 0U, 0U, 0U };
+  uint32_t value_of_eax = 0U;
+  uint32_t value_of_edx = 0U;
+  uint32_t dummy        = 0U;
+
+  /* Yes, this is supposed to be [0], [2], [1] */
+  get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
+  if (_launcher_debug) {
+    printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
+           ((vendor_id[0] >>  0) & 0xff),
+           ((vendor_id[0] >>  8) & 0xff),
+           ((vendor_id[0] >> 16) & 0xff),
+           ((vendor_id[0] >> 24) & 0xff),
+           ((vendor_id[1] >>  0) & 0xff),
+           ((vendor_id[1] >>  8) & 0xff),
+           ((vendor_id[1] >> 16) & 0xff),
+           ((vendor_id[1] >> 24) & 0xff),
+           ((vendor_id[2] >>  0) & 0xff),
+           ((vendor_id[2] >>  8) & 0xff),
+           ((vendor_id[2] >> 16) & 0xff),
+           ((vendor_id[2] >> 24) & 0xff));
+  }
+  get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
+  if (_launcher_debug) {
+    printf("value_of_eax: 0x%x  value_of_edx: 0x%x\n",
+           value_of_eax, value_of_edx);
+  }
+  if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
+      (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
+    if ((((vendor_id[0] >>  0) & 0xff) == 'G') &&
+        (((vendor_id[0] >>  8) & 0xff) == 'e') &&
+        (((vendor_id[0] >> 16) & 0xff) == 'n') &&
+        (((vendor_id[0] >> 24) & 0xff) == 'u') &&
+        (((vendor_id[1] >>  0) & 0xff) == 'i') &&
+        (((vendor_id[1] >>  8) & 0xff) == 'n') &&
+        (((vendor_id[1] >> 16) & 0xff) == 'e') &&
+        (((vendor_id[1] >> 24) & 0xff) == 'I') &&
+        (((vendor_id[2] >>  0) & 0xff) == 'n') &&
+        (((vendor_id[2] >>  8) & 0xff) == 't') &&
+        (((vendor_id[2] >> 16) & 0xff) == 'e') &&
+        (((vendor_id[2] >> 24) & 0xff) == 'l')) {
+      if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
+        if (_launcher_debug) {
+          printf("Hyperthreading supported\n");
+        }
+        result = hts_supported;
+      } else {
+        if (_launcher_debug) {
+          printf("Hyperthreading not supported\n");
+        }
+        result = hts_not_supported;
+      }
+    } else {
+      if (_launcher_debug) {
+        printf("Not GenuineIntel\n");
+      }
+      result = hts_not_intel;
+    }
+  } else {
+    if (_launcher_debug) {
+      printf("not Pentium 4 or extended\n");
+    }
+    result = hts_not_pentium4;
+  }
+  return result;
+}
+
+/* Determine how many logical processors there are per CPU */
+unsigned int
+logical_processors_per_package(void) {
+  /*
+   * After CPUID with EAX==1, register EBX bits 23 through 16
+   * indicate the number of logical processors per package
+   */
+# define NUM_LOGICAL_SHIFT 16
+# define NUM_LOGICAL_MASK 0xff
+  unsigned int result                        = 1U;
+  const HyperThreadingSupport hyperthreading = hyperthreading_support();
+
+  if (hyperthreading == hts_supported) {
+    uint32_t value_of_ebx = 0U;
+    uint32_t dummy        = 0U;
+
+    get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
+    result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
+    if (_launcher_debug) {
+      printf("logical processors per package: %u\n", result);
+    }
+  }
+  return result;
+}
+
+/* Compute the number of physical processors, not logical processors */
+unsigned long
+physical_processors(void) {
+  const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
+  unsigned long result      = sys_processors;
+
+  if (_launcher_debug) {
+    printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
+  }
+  if (sys_processors > 1) {
+    unsigned int logical_processors = logical_processors_per_package();
+    if (logical_processors > 1) {
+      result = (unsigned long) sys_processors / logical_processors;
+    }
+  }
+  if (_launcher_debug) {
+    printf("physical processors: %lu\n", result);
+  }
+  return result;
+}
+
+#endif /* i586 */
+
+#if defined(__sun) && defined(i586)
+
+/* The definition of a server-class machine for solaris-i586/amd64 */
+jboolean
+solaris_i586_ServerClassMachine(void) {
+  jboolean            result            = JNI_FALSE;
+  /* How big is a server class machine? */
+  const unsigned long server_processors = 2UL;
+  const uint64_t      server_memory     = 2UL * GB;
+  /*
+   * We seem not to get our full complement of memory.
+   *     We allow some part (1/8?) of the memory to be "missing",
+   *     based on the sizes of DIMMs, and maybe graphics cards.
+   */
+  const uint64_t      missing_memory    = 256UL * MB;
+  const uint64_t      actual_memory     = physical_memory();
+
+  /* Is this a server class machine? */
+  if (actual_memory >= (server_memory - missing_memory)) {
+    const unsigned long actual_processors = physical_processors();
+    if (actual_processors >= server_processors) {
+      result = JNI_TRUE;
+    }
+  }
+  if (_launcher_debug) {
+    printf("solaris_" ARCH "_ServerClassMachine: %s\n",
+           (result == JNI_TRUE ? "true" : "false"));
+  }
+  return result;
+}
+
+#endif /* __sun && i586 */
+
+#if defined(__linux__) && defined(i586)
+
+/* The definition of a server-class machine for linux-i586 */
+jboolean
+linux_i586_ServerClassMachine(void) {
+  jboolean            result            = JNI_FALSE;
+  /* How big is a server class machine? */
+  const unsigned long server_processors = 2UL;
+  const uint64_t      server_memory     = 2UL * GB;
+  /*
+   * We seem not to get our full complement of memory.
+   *     We allow some part (1/8?) of the memory to be "missing",
+   *     based on the sizes of DIMMs, and maybe graphics cards.
+   */
+  const uint64_t      missing_memory    = 256UL * MB;
+  const uint64_t      actual_memory     = physical_memory();
+
+  /* Is this a server class machine? */
+  if (actual_memory >= (server_memory - missing_memory)) {
+    const unsigned long actual_processors = physical_processors();
+    if (actual_processors >= server_processors) {
+      result = JNI_TRUE;
+    }
+  }
+  if (_launcher_debug) {
+    printf("linux_" ARCH "_ServerClassMachine: %s\n",
+           (result == JNI_TRUE ? "true" : "false"));
+  }
+  return result;
+}
+
+#endif /* __linux__ && i586 */
+
+/* Dispatch to the platform-specific definition of "server-class" */
+jboolean
+ServerClassMachine(void) {
+  jboolean result = JNI_FALSE;
+#if   defined(__sun) && defined(__sparc)
+  result = solaris_sparc_ServerClassMachine();
+#elif defined(__sun) && defined(i586)
+  result = solaris_i586_ServerClassMachine();
+#elif defined(__linux__) && defined(i586)
+  result = linux_i586_ServerClassMachine();
+#else
+  if (_launcher_debug) {
+    printf("ServerClassMachine: returns default value of %s\n",
+           (result == JNI_TRUE ? "true" : "false"));
+  }
+#endif
+  return result;
+}
+
+#endif /* ifndef GAMMA */
+
+#ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */
+
+/*
+ *      Since using the file system as a registry is a bit risky, perform
+ *      additional sanity checks on the identified directory to validate
+ *      it as a valid jre/sdk.
+ *
+ *      Return 0 if the tests fail; otherwise return non-zero (true).
+ *
+ *      Note that checking for anything more than the existence of an
+ *      executable object at bin/java relative to the path being checked
+ *      will break the regression tests.
+ */
+static int
+CheckSanity(char *path, char *dir)
+{
+    char    buffer[PATH_MAX];
+
+    if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
+        return (0);     /* Silently reject "impossibly" long paths */
+
+    (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
+    return ((access(buffer, X_OK) == 0) ? 1 : 0);
+}
+
+/*
+ *      Determine if there is an acceptable JRE in the directory dirname.
+ *      Upon locating the "best" one, return a fully qualified path to
+ *      it. "Best" is defined as the most advanced JRE meeting the
+ *      constraints contained in the manifest_info. If no JRE in this
+ *      directory meets the constraints, return NULL.
+ *
+ *      Note that we don't check for errors in reading the directory
+ *      (which would be done by checking errno).  This is because it
+ *      doesn't matter if we get an error reading the directory, or
+ *      we just don't find anything interesting in the directory.  We
+ *      just return NULL in either case.
+ *
+ *      The historical names of j2sdk and j2re were changed to jdk and
+ *      jre respecively as part of the 1.5 rebranding effort.  Since the
+ *      former names are legacy on Linux, they must be recognized for
+ *      all time.  Fortunately, this is a minor cost.
+ */
+static char
+*ProcessDir(manifest_info *info, char *dirname)
+{
+    DIR     *dirp;
+    struct dirent *dp;
+    char    *best = NULL;
+    int     offset;
+    int     best_offset = 0;
+    char    *ret_str = NULL;
+    char    buffer[PATH_MAX];
+
+    if ((dirp = opendir(dirname)) == NULL)
+        return (NULL);
+
+    do {
+        if ((dp = readdir(dirp)) != NULL) {
+            offset = 0;
+            if ((strncmp(dp->d_name, "jre", 3) == 0) ||
+                (strncmp(dp->d_name, "jdk", 3) == 0))
+                offset = 3;
+            else if (strncmp(dp->d_name, "j2re", 4) == 0)
+                offset = 4;
+            else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
+                offset = 5;
+            if (offset > 0) {
+                if ((acceptable_release(dp->d_name + offset,
+                    info->jre_version)) && CheckSanity(dirname, dp->d_name))
+                    if ((best == NULL) || (exact_version_id(
+                      dp->d_name + offset, best + best_offset) > 0)) {
+                        if (best != NULL)
+                            free(best);
+                        best = strdup(dp->d_name);
+                        best_offset = offset;
+                    }
+            }
+        }
+    } while (dp != NULL);
+    (void) closedir(dirp);
+    if (best == NULL)
+        return (NULL);
+    else {
+        ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2);
+        ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
+        free(best);
+        return (ret_str);
+    }
+}
+
+/*
+ *      This is the global entry point. It examines the host for the optimal
+ *      JRE to be used by scanning a set of directories.  The set of directories
+ *      is platform dependent and can be overridden by the environment
+ *      variable JAVA_VERSION_PATH.
+ *
+ *      This routine itself simply determines the set of appropriate
+ *      directories before passing control onto ProcessDir().
+ */
+char*
+LocateJRE(manifest_info* info)
+{
+    char        *path;
+    char        *home;
+    char        *target = NULL;
+    char        *dp;
+    char        *cp;
+
+    /*
+     * Start by getting JAVA_VERSION_PATH
+     */
+    if (info->jre_restrict_search)
+        path = strdup(system_dir);
+    else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
+        path = strdup(path);
+    else
+        if ((home = getenv("HOME")) != NULL) {
+            path = (char *)MemAlloc(strlen(home) + 13);
+            path = strcat(strcat(strcat(strcpy(path, home),
+                user_dir), ":"), system_dir);
+        } else
+            path = strdup(system_dir);
+
+    /*
+     * Step through each directory on the path. Terminate the scan with
+     * the first directory with an acceptable JRE.
+     */
+    cp = dp = path;
+    while (dp != NULL) {
+        cp = strchr(dp, (int)':');
+        if (cp != NULL)
+            *cp = (char)NULL;
+        if ((target = ProcessDir(info, dp)) != NULL)
+            break;
+        dp = cp;
+        if (dp != NULL)
+            dp++;
+    }
+    free(path);
+    return (target);
+}
+
+/*
+ * Given a path to a jre to execute, this routine checks if this process
+ * is indeed that jre.  If not, it exec's that jre.
+ *
+ * We want to actually check the paths rather than just the version string
+ * built into the executable, so that given version specification (and
+ * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
+ * of the version of the arbitrary launcher we start with.
+ */
+void
+ExecJRE(char *jre, char **argv)
+{
+    char    wanted[PATH_MAX];
+    char    *execname;
+    char    *progname;
+
+    /*
+     * Resolve the real path to the directory containing the selected JRE.
+     */
+    if (realpath(jre, wanted) == NULL) {
+        fprintf(stderr, "Unable to resolve %s\n", jre);
+        exit(1);
+    }
+
+    /*
+     * Resolve the real path to the currently running launcher.
+     */
+    execname = SetExecname(argv);
+    if (execname == NULL) {
+        fprintf(stderr, "Unable to resolve current executable\n");
+        exit(1);
+    }
+
+    /*
+     * If the path to the selected JRE directory is a match to the initial
+     * portion of the path to the currently executing JRE, we have a winner!
+     * If so, just return.
+     */
+    if (strncmp(wanted, execname, strlen(wanted)) == 0)
+        return;                 /* I am the droid you were looking for */
+
+    /*
+     * If this isn't the selected version, exec the selected version.
+     */
+#ifdef JAVA_ARGS  /* javac, jar and friends. */
+    progname = "java";
+#else             /* java, oldjava, javaw and friends */
+#ifdef PROGNAME
+    progname = PROGNAME;
+#else
+    progname = *argv;
+    if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
+        progname = s + 1;
+    }
+#endif /* PROGNAME */
+#endif /* JAVA_ARGS */
+
+    /*
+     * This should never happen (because of the selection code in SelectJRE),
+     * but check for "impossibly" long path names just because buffer overruns
+     * can be so deadly.
+     */
+    if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
+        fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
+        exit(1);
+    }
+
+    /*
+     * Construct the path and exec it.
+     */
+    (void)strcat(strcat(wanted, "/bin/"), progname);
+    argv[0] = progname;
+    if (_launcher_debug) {
+        int i;
+        printf("execv(\"%s\"", wanted);
+        for (i = 0; argv[i] != NULL; i++)
+            printf(", \"%s\"", argv[i]);
+        printf(")\n");
+    }
+    execv(wanted, argv);
+    fprintf(stderr, "Exec of %s failed\n", wanted);
+    exit(1);
+}
+
+#endif /* ifndef GAMMA */
+
+/*
+ * "Borrowed" from Solaris 10 where the unsetenv() function is being added
+ * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
+ * such, in the fullness of time this will appear in libc on all relevant
+ * Solaris/Linux platforms and maybe even the Windows platform.  At that
+ * time, this stub can be removed.
+ *
+ * This implementation removes the environment locking for multithreaded
+ * applications.  (We don't have access to these mutexes within libc and
+ * the launcher isn't multithreaded.)  Note that what remains is platform
+ * independent, because it only relies on attributes that a POSIX environment
+ * defines.
+ *
+ * Returns 0 on success, -1 on failure.
+ *
+ * Also removed was the setting of errno.  The only value of errno set
+ * was EINVAL ("Invalid Argument").
+ */
+
+/*
+ * s1(environ) is name=value
+ * s2(name) is name(not the form of name=value).
+ * if names match, return value of 1, else return 0
+ */
+static int
+match_noeq(const char *s1, const char *s2)
+{
+        while (*s1 == *s2++) {
+                if (*s1++ == '=')
+                        return (1);
+        }
+        if (*s1 == '=' && s2[-1] == '\0')
+                return (1);
+        return (0);
+}
+
+/*
+ * added for SUSv3 standard
+ *
+ * Delete entry from environ.
+ * Do not free() memory!  Other threads may be using it.
+ * Keep it around forever.
+ */
+static int
+borrowed_unsetenv(const char *name)
+{
+        long    idx;            /* index into environ */
+
+        if (name == NULL || *name == '\0' ||
+            strchr(name, '=') != NULL) {
+                return (-1);
+        }
+
+        for (idx = 0; environ[idx] != NULL; idx++) {
+                if (match_noeq(environ[idx], name))
+                        break;
+        }
+        if (environ[idx] == NULL) {
+                /* name not found but still a success */
+                return (0);
+        }
+        /* squeeze up one entry */
+        do {
+                environ[idx] = environ[idx+1];
+        } while (environ[++idx] != NULL);
+
+        return (0);
+}
+/* --- End of "borrowed" code --- */
+
+/*
+ * Wrapper for unsetenv() function.
+ */
+int
+UnsetEnv(char *name)
+{
+    return(borrowed_unsetenv(name));
+}