duke@435: /*
duke@435:  * Copyright 1999-2005 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: /*
duke@435:  * Gamma (Hotspot internal engineering test) launcher based on 1.6.0-b28 JDK,
duke@435:  * search "GAMMA" for gamma specific changes.
duke@435:  */
duke@435: 
duke@435: #include "java.h"
duke@435: #include <dirent.h>
duke@435: #include <dlfcn.h>
duke@435: #include <fcntl.h>
duke@435: #include <inttypes.h>
duke@435: #include <stdio.h>
duke@435: #include <string.h>
duke@435: #include <stdlib.h>
duke@435: #include <limits.h>
duke@435: #include <sys/stat.h>
duke@435: #include <unistd.h>
duke@435: #include <sys/types.h>
duke@435: 
duke@435: #ifndef GAMMA
duke@435: #include "manifest_info.h"
duke@435: #include "version_comp.h"
duke@435: #endif
duke@435: 
duke@435: #define JVM_DLL "libjvm.so"
duke@435: #define JAVA_DLL "libjava.so"
duke@435: 
duke@435: #ifndef GAMMA   /* launcher.make defines ARCH */
duke@435: 
duke@435: /*
duke@435:  * If a processor / os combination has the ability to run binaries of
duke@435:  * two data models and cohabitation of jre/jdk bits with both data
duke@435:  * models is supported, then DUAL_MODE is defined.  When DUAL_MODE is
duke@435:  * defined, the architecture names for the narrow and wide version of
duke@435:  * the architecture are defined in BIG_ARCH and SMALL_ARCH.  Currently
duke@435:  * only Solaris on sparc/sparcv9 and i586/amd64 is DUAL_MODE; linux
duke@435:  * i586/amd64 could be defined as DUAL_MODE but that is not the
duke@435:  * current policy.
duke@435:  */
duke@435: 
duke@435: #ifdef _LP64
duke@435: 
duke@435: #  ifdef ia64
duke@435: #    define ARCH "ia64"
duke@435: #  elif defined(amd64)
duke@435: #    define ARCH "amd64"
duke@435: #  elif defined(__sparc)
duke@435: #    define ARCH "sparcv9"
duke@435: #  else
duke@435: #    define ARCH "unknown" /* unknown 64-bit architecture */
duke@435: #  endif
duke@435: 
duke@435: #else /* 32-bit data model */
duke@435: 
duke@435: #  ifdef i586
duke@435: #    define ARCH "i386"
duke@435: #  elif defined(__sparc)
duke@435: #    define ARCH "sparc"
duke@435: #  endif
duke@435: 
duke@435: #endif /* _LP64 */
duke@435: 
duke@435: #ifdef __sun
duke@435: #  define DUAL_MODE
duke@435: #  ifdef __sparc
duke@435: #    define BIG_ARCH "sparcv9"
duke@435: #    define SMALL_ARCH "sparc"
duke@435: #  else
duke@435: #    define BIG_ARCH "amd64"
duke@435: #    define SMALL_ARCH "i386"
duke@435: #  endif
duke@435: #  include <sys/systeminfo.h>
duke@435: #  include <sys/elf.h>
duke@435: #  include <stdio.h>
duke@435: #else
duke@435: #  ifndef ARCH
duke@435: #    include <sys/systeminfo.h>
duke@435: #  endif
duke@435: #endif
duke@435: 
duke@435: #endif /* ifndef GAMMA */
duke@435: 
duke@435: /* pointer to environment */
duke@435: extern char **environ;
duke@435: 
duke@435: #ifndef GAMMA
duke@435: 
duke@435: /*
duke@435:  *      A collection of useful strings. One should think of these as #define
duke@435:  *      entries, but actual strings can be more efficient (with many compilers).
duke@435:  */
duke@435: #ifdef __linux__
duke@435: static const char *system_dir   = "/usr/java";
duke@435: static const char *user_dir     = "/java";
duke@435: #else /* Solaris */
duke@435: static const char *system_dir   = "/usr/jdk";
duke@435: static const char *user_dir     = "/jdk";
duke@435: #endif
duke@435: 
duke@435: #endif  /* ifndef GAMMA */
duke@435: 
duke@435: /*
duke@435:  * Flowchart of launcher execs and options processing on unix
duke@435:  *
duke@435:  * The selection of the proper vm shared library to open depends on
duke@435:  * several classes of command line options, including vm "flavor"
duke@435:  * options (-client, -server) and the data model options, -d32  and
duke@435:  * -d64, as well as a version specification which may have come from
duke@435:  * the command line or from the manifest of an executable jar file.
duke@435:  * The vm selection options are not passed to the running
duke@435:  * virtual machine; they must be screened out by the launcher.
duke@435:  *
duke@435:  * The version specification (if any) is processed first by the
duke@435:  * platform independent routine SelectVersion.  This may result in
duke@435:  * the exec of the specified launcher version.
duke@435:  *
duke@435:  * Typically, the launcher execs at least once to ensure a suitable
duke@435:  * LD_LIBRARY_PATH is in effect for the process.  The first exec
duke@435:  * screens out all the data model options; leaving the choice of data
duke@435:  * model implicit in the binary selected to run.  However, in case no
duke@435:  * exec is done, the data model options are screened out before the vm
duke@435:  * is invoked.
duke@435:  *
duke@435:  *  incoming argv ------------------------------
duke@435:  *  |                                          |
duke@435:  * \|/                                         |
duke@435:  * CheckJVMType                                |
duke@435:  * (removes -client, -server, etc.)            |
duke@435:  *                                            \|/
duke@435:  *                                            CreateExecutionEnvironment
duke@435:  *                                            (removes -d32 and -d64,
duke@435:  *                                             determines desired data model,
duke@435:  *                                             sets up LD_LIBRARY_PATH,
duke@435:  *                                             and exec's)
duke@435:  *                                             |
duke@435:  *  --------------------------------------------
duke@435:  *  |
duke@435:  * \|/
duke@435:  * exec child 1 incoming argv -----------------
duke@435:  *  |                                          |
duke@435:  * \|/                                         |
duke@435:  * CheckJVMType                                |
duke@435:  * (removes -client, -server, etc.)            |
duke@435:  *  |                                         \|/
duke@435:  *  |                                          CreateExecutionEnvironment
duke@435:  *  |                                          (verifies desired data model
duke@435:  *  |                                           is running and acceptable
duke@435:  *  |                                           LD_LIBRARY_PATH;
duke@435:  *  |                                           no-op in child)
duke@435:  *  |
duke@435:  * \|/
duke@435:  * TranslateDashJArgs...
duke@435:  * (Prepare to pass args to vm)
duke@435:  *  |
duke@435:  *  |
duke@435:  *  |
duke@435:  * \|/
duke@435:  * ParseArguments
duke@435:  * (ignores -d32 and -d64,
duke@435:  *  processes version options,
duke@435:  *  creates argument list for vm,
duke@435:  *  etc.)
duke@435:  *
duke@435:  */
duke@435: 
duke@435: static char *SetExecname(char **argv);
duke@435: static char * GetExecname();
duke@435: static jboolean GetJVMPath(const char *jrepath, const char *jvmtype,
duke@435:                            char *jvmpath, jint jvmpathsize, char * arch);
duke@435: static jboolean GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative);
duke@435: 
duke@435: const char *
duke@435: GetArch()
duke@435: {
duke@435:     static char *arch = NULL;
duke@435:     static char buf[12];
duke@435:     if (arch) {
duke@435:         return arch;
duke@435:     }
duke@435: 
duke@435: #ifdef ARCH
duke@435:     strcpy(buf, ARCH);
duke@435: #else
duke@435:     sysinfo(SI_ARCHITECTURE, buf, sizeof(buf));
duke@435: #endif
duke@435:     arch = buf;
duke@435:     return arch;
duke@435: }
duke@435: 
duke@435: void
duke@435: CreateExecutionEnvironment(int *_argcp,
duke@435:                            char ***_argvp,
duke@435:                            char jrepath[],
duke@435:                            jint so_jrepath,
duke@435:                            char jvmpath[],
duke@435:                            jint so_jvmpath,
duke@435:                            char **original_argv) {
duke@435:   /*
duke@435:    * First, determine if we are running the desired data model.  If we
duke@435:    * are running the desired data model, all the error messages
duke@435:    * associated with calling GetJREPath, ReadKnownVMs, etc. should be
duke@435:    * output.  However, if we are not running the desired data model,
duke@435:    * some of the errors should be suppressed since it is more
duke@435:    * informative to issue an error message based on whether or not the
duke@435:    * os/processor combination has dual mode capabilities.
duke@435:    */
duke@435: 
duke@435:     char *execname = NULL;
duke@435:     int original_argc = *_argcp;
duke@435:     jboolean jvmpathExists;
duke@435: 
duke@435:     /* Compute the name of the executable */
duke@435:     execname = SetExecname(*_argvp);
duke@435: 
duke@435: #ifndef GAMMA
duke@435:     /* Set the LD_LIBRARY_PATH environment variable, check data model
duke@435:        flags, and exec process, if needed */
duke@435:     {
duke@435:       char *arch        = (char *)GetArch(); /* like sparc or sparcv9 */
duke@435:       char * jvmtype    = NULL;
duke@435:       int argc          = *_argcp;
duke@435:       char **argv       = original_argv;
duke@435: 
duke@435:       char *runpath     = NULL; /* existing effective LD_LIBRARY_PATH
duke@435:                                    setting */
duke@435: 
duke@435:       int running       =       /* What data model is being ILP32 =>
duke@435:                                    32 bit vm; LP64 => 64 bit vm */
duke@435: #ifdef _LP64
duke@435:         64;
duke@435: #else
duke@435:       32;
duke@435: #endif
duke@435: 
duke@435:       int wanted        = running;      /* What data mode is being
duke@435:                                            asked for? Current model is
duke@435:                                            fine unless another model
duke@435:                                            is asked for */
duke@435: 
duke@435:       char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
duke@435:       char* newpath     = NULL; /* path on new LD_LIBRARY_PATH */
duke@435:       char* lastslash   = NULL;
duke@435: 
duke@435:       char** newenvp    = NULL; /* current environment */
duke@435: 
duke@435:       char** newargv    = NULL;
duke@435:       int    newargc    = 0;
duke@435: #ifdef __sun
duke@435:       char*  dmpath     = NULL;  /* data model specific LD_LIBRARY_PATH,
duke@435:                                     Solaris only */
duke@435: #endif
duke@435: 
duke@435:       /*
duke@435:        * Starting in 1.5, all unix platforms accept the -d32 and -d64
duke@435:        * options.  On platforms where only one data-model is supported
duke@435:        * (e.g. ia-64 Linux), using the flag for the other data model is
duke@435:        * an error and will terminate the program.
duke@435:        */
duke@435: 
duke@435:       { /* open new scope to declare local variables */
duke@435:         int i;
duke@435: 
duke@435:         newargv = (char **)MemAlloc((argc+1) * sizeof(*newargv));
duke@435:         newargv[newargc++] = argv[0];
duke@435: 
duke@435:         /* scan for data model arguments and remove from argument list;
duke@435:            last occurrence determines desired data model */
duke@435:         for (i=1; i < argc; i++) {
duke@435: 
duke@435:           if (strcmp(argv[i], "-J-d64") == 0 || strcmp(argv[i], "-d64") == 0) {
duke@435:             wanted = 64;
duke@435:             continue;
duke@435:           }
duke@435:           if (strcmp(argv[i], "-J-d32") == 0 || strcmp(argv[i], "-d32") == 0) {
duke@435:             wanted = 32;
duke@435:             continue;
duke@435:           }
duke@435:           newargv[newargc++] = argv[i];
duke@435: 
duke@435: #ifdef JAVA_ARGS
duke@435:           if (argv[i][0] != '-')
duke@435:             continue;
duke@435: #else
duke@435:           if (strcmp(argv[i], "-classpath") == 0 || strcmp(argv[i], "-cp") == 0) {
duke@435:             i++;
duke@435:             if (i >= argc) break;
duke@435:             newargv[newargc++] = argv[i];
duke@435:             continue;
duke@435:           }
duke@435:           if (argv[i][0] != '-') { i++; break; }
duke@435: #endif
duke@435:         }
duke@435: 
duke@435:         /* copy rest of args [i .. argc) */
duke@435:         while (i < argc) {
duke@435:           newargv[newargc++] = argv[i++];
duke@435:         }
duke@435:         newargv[newargc] = NULL;
duke@435: 
duke@435:         /*
duke@435:          * newargv has all proper arguments here
duke@435:          */
duke@435: 
duke@435:         argc = newargc;
duke@435:         argv = newargv;
duke@435:       }
duke@435: 
duke@435:       /* If the data model is not changing, it is an error if the
duke@435:          jvmpath does not exist */
duke@435:       if (wanted == running) {
duke@435:         /* Find out where the JRE is that we will be using. */
duke@435:         if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
duke@435:           fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
duke@435:           exit(2);
duke@435:         }
duke@435: 
duke@435:         /* Find the specified JVM type */
duke@435:         if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) {
duke@435:           fprintf(stderr, "Error: no known VMs. (check for corrupt jvm.cfg file)\n");
duke@435:           exit(1);
duke@435:         }
duke@435: 
duke@435:         jvmpath[0] = '\0';
duke@435:         jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE);
duke@435: 
duke@435:         if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) {
duke@435:           fprintf(stderr, "Error: no `%s' JVM at `%s'.\n", jvmtype, jvmpath);
duke@435:           exit(4);
duke@435:         }
duke@435:       } else {  /* do the same speculatively or exit */
duke@435: #ifdef DUAL_MODE
duke@435:         if (running != wanted) {
duke@435:           /* Find out where the JRE is that we will be using. */
duke@435:           if (!GetJREPath(jrepath, so_jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE)) {
duke@435:             goto EndDataModelSpeculate;
duke@435:           }
duke@435: 
duke@435:           /*
duke@435:            * Read in jvm.cfg for target data model and process vm
duke@435:            * selection options.
duke@435:            */
duke@435:           if (ReadKnownVMs(jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH), JNI_TRUE) < 1) {
duke@435:             goto EndDataModelSpeculate;
duke@435:           }
duke@435:           jvmpath[0] = '\0';
duke@435:           jvmtype = CheckJvmType(_argcp, _argvp, JNI_TRUE);
duke@435:           /* exec child can do error checking on the existence of the path */
duke@435:           jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath,
duke@435:                                      ((wanted==64)?BIG_ARCH:SMALL_ARCH));
duke@435: 
duke@435:         }
duke@435:       EndDataModelSpeculate: /* give up and let other code report error message */
duke@435:         ;
duke@435: #else
duke@435:         fprintf(stderr, "Running a %d-bit JVM is not supported on this platform.\n", wanted);
duke@435:         exit(1);
duke@435: #endif
duke@435:       }
duke@435: 
duke@435:       /*
duke@435:        * We will set the LD_LIBRARY_PATH as follows:
duke@435:        *
duke@435:        *     o          $JVMPATH (directory portion only)
duke@435:        *     o          $JRE/lib/$ARCH
duke@435:        *     o          $JRE/../lib/$ARCH
duke@435:        *
duke@435:        * followed by the user's previous effective LD_LIBRARY_PATH, if
duke@435:        * any.
duke@435:        */
duke@435: 
duke@435: #ifdef __sun
duke@435:       /*
duke@435:        * Starting in Solaris 7, ld.so.1 supports three LD_LIBRARY_PATH
duke@435:        * variables:
duke@435:        *
duke@435:        * 1. LD_LIBRARY_PATH -- used for 32 and 64 bit searches if
duke@435:        * data-model specific variables are not set.
duke@435:        *
duke@435:        * 2. LD_LIBRARY_PATH_64 -- overrides and replaces LD_LIBRARY_PATH
duke@435:        * for 64-bit binaries.
duke@435:        *
duke@435:        * 3. LD_LIBRARY_PATH_32 -- overrides and replaces LD_LIBRARY_PATH
duke@435:        * for 32-bit binaries.
duke@435:        *
duke@435:        * The vm uses LD_LIBRARY_PATH to set the java.library.path system
duke@435:        * property.  To shield the vm from the complication of multiple
duke@435:        * LD_LIBRARY_PATH variables, if the appropriate data model
duke@435:        * specific variable is set, we will act as if LD_LIBRARY_PATH had
duke@435:        * the value of the data model specific variant and the data model
duke@435:        * specific variant will be unset.  Note that the variable for the
duke@435:        * *wanted* data model must be used (if it is set), not simply the
duke@435:        * current running data model.
duke@435:        */
duke@435: 
duke@435:       switch(wanted) {
duke@435:       case 0:
duke@435:         if(running == 32) {
duke@435:           dmpath = getenv("LD_LIBRARY_PATH_32");
duke@435:           wanted = 32;
duke@435:         }
duke@435:         else {
duke@435:           dmpath = getenv("LD_LIBRARY_PATH_64");
duke@435:           wanted = 64;
duke@435:         }
duke@435:         break;
duke@435: 
duke@435:       case 32:
duke@435:         dmpath = getenv("LD_LIBRARY_PATH_32");
duke@435:         break;
duke@435: 
duke@435:       case 64:
duke@435:         dmpath = getenv("LD_LIBRARY_PATH_64");
duke@435:         break;
duke@435: 
duke@435:       default:
duke@435:         fprintf(stderr, "Improper value at line %d.", __LINE__);
duke@435:         exit(1); /* unknown value in wanted */
duke@435:         break;
duke@435:       }
duke@435: 
duke@435:       /*
duke@435:        * If dmpath is NULL, the relevant data model specific variable is
duke@435:        * not set and normal LD_LIBRARY_PATH should be used.
duke@435:        */
duke@435:       if( dmpath == NULL) {
duke@435:         runpath = getenv("LD_LIBRARY_PATH");
duke@435:       }
duke@435:       else {
duke@435:         runpath = dmpath;
duke@435:       }
duke@435: #else
duke@435:       /*
duke@435:        * If not on Solaris, assume only a single LD_LIBRARY_PATH
duke@435:        * variable.
duke@435:        */
duke@435:       runpath = getenv("LD_LIBRARY_PATH");
duke@435: #endif /* __sun */
duke@435: 
duke@435: #ifdef __linux
duke@435:       /*
duke@435:        * On linux, if a binary is running as sgid or suid, glibc sets
duke@435:        * LD_LIBRARY_PATH to the empty string for security purposes.  (In
duke@435:        * contrast, on Solaris the LD_LIBRARY_PATH variable for a
duke@435:        * privileged binary does not lose its settings; but the dynamic
duke@435:        * linker does apply more scrutiny to the path.) The launcher uses
duke@435:        * the value of LD_LIBRARY_PATH to prevent an exec loop.
duke@435:        * Therefore, if we are running sgid or suid, this function's
duke@435:        * setting of LD_LIBRARY_PATH will be ineffective and we should
duke@435:        * return from the function now.  Getting the right libraries to
duke@435:        * be found must be handled through other mechanisms.
duke@435:        */
duke@435:       if((getgid() != getegid()) || (getuid() != geteuid()) ) {
duke@435:         return;
duke@435:       }
duke@435: #endif
duke@435: 
duke@435:       /* runpath contains current effective LD_LIBRARY_PATH setting */
duke@435: 
duke@435:       jvmpath = strdup(jvmpath);
duke@435:       new_runpath = MemAlloc( ((runpath!=NULL)?strlen(runpath):0) +
duke@435:                               2*strlen(jrepath) + 2*strlen(arch) +
duke@435:                               strlen(jvmpath) + 52);
duke@435:       newpath = new_runpath + strlen("LD_LIBRARY_PATH=");
duke@435: 
duke@435: 
duke@435:       /*
duke@435:        * Create desired LD_LIBRARY_PATH value for target data model.
duke@435:        */
duke@435:       {
duke@435:         /* remove the name of the .so from the JVM path */
duke@435:         lastslash = strrchr(jvmpath, '/');
duke@435:         if (lastslash)
duke@435:           *lastslash = '\0';
duke@435: 
duke@435: 
duke@435:         /* jvmpath, ((running != wanted)?((wanted==64)?"/"BIG_ARCH:"/.."):""), */
duke@435: 
duke@435:         sprintf(new_runpath, "LD_LIBRARY_PATH="
duke@435:                 "%s:"
duke@435:                 "%s/lib/%s:"
duke@435:                 "%s/../lib/%s",
duke@435:                 jvmpath,
duke@435: #ifdef DUAL_MODE
duke@435:                 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH),
duke@435:                 jrepath, ((wanted==64)?BIG_ARCH:SMALL_ARCH)
duke@435: #else
duke@435:                 jrepath, arch,
duke@435:                 jrepath, arch
duke@435: #endif
duke@435:                 );
duke@435: 
duke@435: 
duke@435:         /*
duke@435:          * Check to make sure that the prefix of the current path is the
duke@435:          * desired environment variable setting.
duke@435:          */
duke@435:         if (runpath != NULL &&
duke@435:             strncmp(newpath, runpath, strlen(newpath))==0 &&
duke@435:             (runpath[strlen(newpath)] == 0 || runpath[strlen(newpath)] == ':') &&
duke@435:             (running == wanted) /* data model does not have to be changed */
duke@435: #ifdef __sun
duke@435:             && (dmpath == NULL)    /* data model specific variables not set  */
duke@435: #endif
duke@435:             ) {
duke@435: 
duke@435:           return;
duke@435: 
duke@435:         }
duke@435:       }
duke@435: 
duke@435:       /*
duke@435:        * Place the desired environment setting onto the prefix of
duke@435:        * LD_LIBRARY_PATH.  Note that this prevents any possible infinite
duke@435:        * loop of execv() because we test for the prefix, above.
duke@435:        */
duke@435:       if (runpath != 0) {
duke@435:         strcat(new_runpath, ":");
duke@435:         strcat(new_runpath, runpath);
duke@435:       }
duke@435: 
duke@435:       if( putenv(new_runpath) != 0) {
duke@435:         exit(1); /* problem allocating memory; LD_LIBRARY_PATH not set
duke@435:                     properly */
duke@435:       }
duke@435: 
duke@435:       /*
duke@435:        * Unix systems document that they look at LD_LIBRARY_PATH only
duke@435:        * once at startup, so we have to re-exec the current executable
duke@435:        * to get the changed environment variable to have an effect.
duke@435:        */
duke@435: 
duke@435: #ifdef __sun
duke@435:       /*
duke@435:        * If dmpath is not NULL, remove the data model specific string
duke@435:        * in the environment for the exec'ed child.
duke@435:        */
duke@435: 
duke@435:       if( dmpath != NULL)
duke@435:         (void)UnsetEnv((wanted==32)?"LD_LIBRARY_PATH_32":"LD_LIBRARY_PATH_64");
duke@435: #endif
duke@435: 
duke@435:       newenvp = environ;
duke@435: 
duke@435:       {
duke@435:         char *newexec = execname;
duke@435: #ifdef DUAL_MODE
duke@435:         /*
duke@435:          * If the data model is being changed, the path to the
duke@435:          * executable must be updated accordingly; the executable name
duke@435:          * and directory the executable resides in are separate.  In the
duke@435:          * case of 32 => 64, the new bits are assumed to reside in, e.g.
duke@435:          * "olddir/BIGARCH/execname"; in the case of 64 => 32,
duke@435:          * the bits are assumed to be in "olddir/../execname".  For example,
duke@435:          *
duke@435:          * olddir/sparcv9/execname
duke@435:          * olddir/amd64/execname
duke@435:          *
duke@435:          * for Solaris SPARC and Linux amd64, respectively.
duke@435:          */
duke@435: 
duke@435:         if (running != wanted) {
duke@435:           char *oldexec = strcpy(MemAlloc(strlen(execname) + 1), execname);
duke@435:           char *olddir = oldexec;
duke@435:           char *oldbase = strrchr(oldexec, '/');
duke@435: 
duke@435: 
duke@435:           newexec = MemAlloc(strlen(execname) + 20);
duke@435:           *oldbase++ = 0;
duke@435:           sprintf(newexec, "%s/%s/%s", olddir,
duke@435:                   ((wanted==64) ? BIG_ARCH : ".."), oldbase);
duke@435:           argv[0] = newexec;
duke@435:         }
duke@435: #endif
duke@435: 
duke@435:         execve(newexec, argv, newenvp);
duke@435:         perror("execve()");
duke@435: 
duke@435:         fprintf(stderr, "Error trying to exec %s.\n", newexec);
duke@435:         fprintf(stderr, "Check if file exists and permissions are set correctly.\n");
duke@435: 
duke@435: #ifdef DUAL_MODE
duke@435:         if (running != wanted) {
duke@435:           fprintf(stderr, "Failed to start a %d-bit JVM process from a %d-bit JVM.\n",
duke@435:                   wanted, running);
duke@435: #  ifdef __sun
duke@435: 
duke@435: #    ifdef __sparc
duke@435:           fprintf(stderr, "Verify all necessary J2SE components have been installed.\n" );
duke@435:           fprintf(stderr,
duke@435:                   "(Solaris SPARC 64-bit components must be installed after 32-bit components.)\n" );
duke@435: #    else
duke@435:           fprintf(stderr, "Either 64-bit processes are not supported by this platform\n");
duke@435:           fprintf(stderr, "or the 64-bit components have not been installed.\n");
duke@435: #    endif
duke@435:         }
duke@435: #  endif
duke@435: #endif
duke@435: 
duke@435:       }
duke@435: 
duke@435:       exit(1);
duke@435:     }
duke@435: 
duke@435: #else  /* ifndef GAMMA */
duke@435: 
duke@435:   /* gamma launcher is simpler in that it doesn't handle VM flavors, data  */
duke@435:   /* model, LD_LIBRARY_PATH, etc. Assuming everything is set-up correctly  */
duke@435:   /* all we need to do here is to return correct path names. See also      */
duke@435:   /* GetJVMPath() and GetApplicationHome().                                */
duke@435: 
duke@435:   { char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
duke@435:     char *p;
duke@435: 
duke@435:     if (!GetJREPath(jrepath, so_jrepath, arch, JNI_FALSE) ) {
duke@435:       fprintf(stderr, "Error: could not find Java 2 Runtime Environment.\n");
duke@435:       exit(2);
duke@435:     }
duke@435: 
duke@435:     if (!GetJVMPath(jrepath, NULL, jvmpath, so_jvmpath, arch )) {
duke@435:       fprintf(stderr, "Error: no JVM at `%s'.\n", jvmpath);
duke@435:       exit(4);
duke@435:     }
duke@435:   }
duke@435: 
duke@435: #endif  /* ifndef GAMMA */
duke@435: }
duke@435: 
duke@435: 
duke@435: /*
duke@435:  * On Solaris VM choosing is done by the launcher (java.c).
duke@435:  */
duke@435: static jboolean
duke@435: GetJVMPath(const char *jrepath, const char *jvmtype,
duke@435:            char *jvmpath, jint jvmpathsize, char * arch)
duke@435: {
duke@435:     struct stat s;
duke@435: 
duke@435: #ifndef GAMMA
duke@435:     if (strchr(jvmtype, '/')) {
duke@435:         sprintf(jvmpath, "%s/" JVM_DLL, jvmtype);
duke@435:     } else {
duke@435:         sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype);
duke@435:     }
duke@435: #else
duke@435:     /* For gamma launcher, JVM is either built-in or in the same directory. */
duke@435:     /* Either way we return "<exe_path>/libjvm.so" where <exe_path> is the  */
duke@435:     /* directory where gamma launcher is located.                           */
duke@435: 
duke@435:     char *p;
duke@435: 
duke@435:     snprintf(jvmpath, jvmpathsize, "%s", GetExecname());
duke@435:     p = strrchr(jvmpath, '/');
duke@435:     if (p) {
duke@435:        /* replace executable name with libjvm.so */
duke@435:        snprintf(p + 1, jvmpathsize - (p + 1 - jvmpath), "%s", JVM_DLL);
duke@435:     } else {
duke@435:        /* this case shouldn't happen */
duke@435:        snprintf(jvmpath, jvmpathsize, "%s", JVM_DLL);
duke@435:     }
duke@435: #endif
duke@435: 
duke@435:     if (_launcher_debug)
duke@435:       printf("Does `%s' exist ... ", jvmpath);
duke@435: 
duke@435:     if (stat(jvmpath, &s) == 0) {
duke@435:         if (_launcher_debug)
duke@435:           printf("yes.\n");
duke@435:         return JNI_TRUE;
duke@435:     } else {
duke@435:         if (_launcher_debug)
duke@435:           printf("no.\n");
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Find path to JRE based on .exe's location or registry settings.
duke@435:  */
duke@435: static jboolean
duke@435: GetJREPath(char *path, jint pathsize, char * arch, jboolean speculative)
duke@435: {
duke@435:     char libjava[MAXPATHLEN];
duke@435: 
duke@435:     if (GetApplicationHome(path, pathsize)) {
duke@435:         /* Is JRE co-located with the application? */
duke@435:         sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch);
duke@435:         if (access(libjava, F_OK) == 0) {
duke@435:             goto found;
duke@435:         }
duke@435: 
duke@435:         /* Does the app ship a private JRE in <apphome>/jre directory? */
duke@435:         sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch);
duke@435:         if (access(libjava, F_OK) == 0) {
duke@435:             strcat(path, "/jre");
duke@435:             goto found;
duke@435:         }
duke@435:     }
duke@435: 
duke@435:     if (!speculative)
duke@435:       fprintf(stderr, "Error: could not find " JAVA_DLL "\n");
duke@435:     return JNI_FALSE;
duke@435: 
duke@435:  found:
duke@435:     if (_launcher_debug)
duke@435:       printf("JRE path is %s\n", path);
duke@435:     return JNI_TRUE;
duke@435: }
duke@435: 
duke@435: jboolean
duke@435: LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
duke@435: {
duke@435: #ifdef GAMMA
duke@435:     /* JVM is directly linked with gamma launcher; no dlopen() */
duke@435:     ifn->CreateJavaVM = JNI_CreateJavaVM;
duke@435:     ifn->GetDefaultJavaVMInitArgs = JNI_GetDefaultJavaVMInitArgs;
duke@435:     return JNI_TRUE;
duke@435: #else
duke@435:     Dl_info dlinfo;
duke@435:     void *libjvm;
duke@435: 
duke@435:     if (_launcher_debug) {
duke@435:         printf("JVM path is %s\n", jvmpath);
duke@435:     }
duke@435: 
duke@435:     libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
duke@435:     if (libjvm == NULL) {
duke@435: #if defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
duke@435:       FILE * fp;
duke@435:       Elf32_Ehdr elf_head;
duke@435:       int count;
duke@435:       int location;
duke@435: 
duke@435:       fp = fopen(jvmpath, "r");
duke@435:       if(fp == NULL)
duke@435:         goto error;
duke@435: 
duke@435:       /* read in elf header */
duke@435:       count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
duke@435:       fclose(fp);
duke@435:       if(count < 1)
duke@435:         goto error;
duke@435: 
duke@435:       /*
duke@435:        * Check for running a server vm (compiled with -xarch=v8plus)
duke@435:        * on a stock v8 processor.  In this case, the machine type in
duke@435:        * the elf header would not be included the architecture list
duke@435:        * provided by the isalist command, which is turn is gotten from
duke@435:        * sysinfo.  This case cannot occur on 64-bit hardware and thus
duke@435:        * does not have to be checked for in binaries with an LP64 data
duke@435:        * model.
duke@435:        */
duke@435:       if(elf_head.e_machine == EM_SPARC32PLUS) {
duke@435:         char buf[257];  /* recommended buffer size from sysinfo man
duke@435:                            page */
duke@435:         long length;
duke@435:         char* location;
duke@435: 
duke@435:         length = sysinfo(SI_ISALIST, buf, 257);
duke@435:         if(length > 0) {
duke@435:           location = strstr(buf, "sparcv8plus ");
duke@435:           if(location == NULL) {
duke@435:             fprintf(stderr, "SPARC V8 processor detected; Server compiler requires V9 or better.\n");
duke@435:             fprintf(stderr, "Use Client compiler on V8 processors.\n");
duke@435:             fprintf(stderr, "Could not create the Java virtual machine.\n");
duke@435:             return JNI_FALSE;
duke@435:           }
duke@435:         }
duke@435:       }
duke@435: #endif
duke@435:       fprintf(stderr, "dl failure on line %d", __LINE__);
duke@435:       goto error;
duke@435:     }
duke@435: 
duke@435:     ifn->CreateJavaVM = (CreateJavaVM_t)
duke@435:       dlsym(libjvm, "JNI_CreateJavaVM");
duke@435:     if (ifn->CreateJavaVM == NULL)
duke@435:         goto error;
duke@435: 
duke@435:     ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
duke@435:         dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
duke@435:     if (ifn->GetDefaultJavaVMInitArgs == NULL)
duke@435:       goto error;
duke@435: 
duke@435:     return JNI_TRUE;
duke@435: 
duke@435: error:
duke@435:     fprintf(stderr, "Error: failed %s, because %s\n", jvmpath, dlerror());
duke@435:     return JNI_FALSE;
duke@435: #endif /* GAMMA */
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Get the path to the file that has the usage message for -X options.
duke@435:  */
duke@435: void
duke@435: GetXUsagePath(char *buf, jint bufsize)
duke@435: {
duke@435:     static const char Xusage_txt[] = "/Xusage.txt";
duke@435:     Dl_info dlinfo;
duke@435: 
duke@435:     /* we use RTLD_NOW because of problems with ld.so.1 and green threads */
duke@435:     dladdr(dlsym(dlopen(JVM_DLL, RTLD_NOW), "JNI_CreateJavaVM"), &dlinfo);
duke@435:     strncpy(buf, (char *)dlinfo.dli_fname, bufsize - sizeof(Xusage_txt));
duke@435: 
duke@435:     buf[bufsize-1] = '\0';
duke@435:     strcpy(strrchr(buf, '/'), Xusage_txt);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put
duke@435:  * "/foo" into buf.
duke@435:  */
duke@435: jboolean
duke@435: GetApplicationHome(char *buf, jint bufsize)
duke@435: {
duke@435: #ifdef __linux__
duke@435:     char *execname = GetExecname();
duke@435:     if (execname) {
duke@435:         strncpy(buf, execname, bufsize-1);
duke@435:         buf[bufsize-1] = '\0';
duke@435:     } else {
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435: #else
duke@435:     Dl_info dlinfo;
duke@435: 
duke@435:     dladdr((void *)GetApplicationHome, &dlinfo);
duke@435:     if (realpath(dlinfo.dli_fname, buf) == NULL) {
duke@435:         fprintf(stderr, "Error: realpath(`%s') failed.\n", dlinfo.dli_fname);
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435: #endif
duke@435: 
duke@435: #ifdef GAMMA
duke@435:     {
duke@435:       /* gamma launcher uses JAVA_HOME environment variable to find JDK/JRE */
duke@435:       char* java_home_var = getenv("JAVA_HOME");
duke@435:       if (java_home_var == NULL) {
duke@435:         printf("JAVA_HOME must point to a valid JDK/JRE to run gamma\n");
duke@435:         return JNI_FALSE;
duke@435:       }
duke@435:       snprintf(buf, bufsize, "%s", java_home_var);
duke@435:     }
duke@435: #else
duke@435:     if (strrchr(buf, '/') == 0) {
duke@435:         buf[0] = '\0';
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435:     *(strrchr(buf, '/')) = '\0';        /* executable file      */
duke@435:     if (strlen(buf) < 4 || strrchr(buf, '/') == 0) {
duke@435:         buf[0] = '\0';
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435:     if (strcmp("/bin", buf + strlen(buf) - 4) != 0)
duke@435:         *(strrchr(buf, '/')) = '\0';    /* sparcv9 or amd64     */
duke@435:     if (strlen(buf) < 4 || strcmp("/bin", buf + strlen(buf) - 4) != 0) {
duke@435:         buf[0] = '\0';
duke@435:         return JNI_FALSE;
duke@435:     }
duke@435:     *(strrchr(buf, '/')) = '\0';        /* bin                  */
duke@435: #endif /* GAMMA */
duke@435: 
duke@435:     return JNI_TRUE;
duke@435: }
duke@435: 
duke@435: 
duke@435: /*
duke@435:  * Return true if the named program exists
duke@435:  */
duke@435: static int
duke@435: ProgramExists(char *name)
duke@435: {
duke@435:     struct stat sb;
duke@435:     if (stat(name, &sb) != 0) return 0;
duke@435:     if (S_ISDIR(sb.st_mode)) return 0;
duke@435:     return (sb.st_mode & S_IEXEC) != 0;
duke@435: }
duke@435: 
duke@435: 
duke@435: /*
duke@435:  * Find a command in a directory, returning the path.
duke@435:  */
duke@435: static char *
duke@435: Resolve(char *indir, char *cmd)
duke@435: {
duke@435:     char name[PATH_MAX + 2], *real;
duke@435: 
duke@435:     if ((strlen(indir) + strlen(cmd) + 1)  > PATH_MAX) return 0;
duke@435:     sprintf(name, "%s%c%s", indir, FILE_SEPARATOR, cmd);
duke@435:     if (!ProgramExists(name)) return 0;
duke@435:     real = MemAlloc(PATH_MAX + 2);
duke@435:     if (!realpath(name, real))
duke@435:         strcpy(real, name);
duke@435:     return real;
duke@435: }
duke@435: 
duke@435: 
duke@435: /*
duke@435:  * Find a path for the executable
duke@435:  */
duke@435: static char *
duke@435: FindExecName(char *program)
duke@435: {
duke@435:     char cwdbuf[PATH_MAX+2];
duke@435:     char *path;
duke@435:     char *tmp_path;
duke@435:     char *f;
duke@435:     char *result = NULL;
duke@435: 
duke@435:     /* absolute path? */
duke@435:     if (*program == FILE_SEPARATOR ||
duke@435:         (FILE_SEPARATOR=='\\' && strrchr(program, ':')))
duke@435:         return Resolve("", program+1);
duke@435: 
duke@435:     /* relative path? */
duke@435:     if (strrchr(program, FILE_SEPARATOR) != 0) {
duke@435:         char buf[PATH_MAX+2];
duke@435:         return Resolve(getcwd(cwdbuf, sizeof(cwdbuf)), program);
duke@435:     }
duke@435: 
duke@435:     /* from search path? */
duke@435:     path = getenv("PATH");
duke@435:     if (!path || !*path) path = ".";
duke@435:     tmp_path = MemAlloc(strlen(path) + 2);
duke@435:     strcpy(tmp_path, path);
duke@435: 
duke@435:     for (f=tmp_path; *f && result==0; ) {
duke@435:         char *s = f;
duke@435:         while (*f && (*f != PATH_SEPARATOR)) ++f;
duke@435:         if (*f) *f++ = 0;
duke@435:         if (*s == FILE_SEPARATOR)
duke@435:             result = Resolve(s, program);
duke@435:         else {
duke@435:             /* relative path element */
duke@435:             char dir[2*PATH_MAX];
duke@435:             sprintf(dir, "%s%c%s", getcwd(cwdbuf, sizeof(cwdbuf)),
duke@435:                     FILE_SEPARATOR, s);
duke@435:             result = Resolve(dir, program);
duke@435:         }
duke@435:         if (result != 0) break;
duke@435:     }
duke@435: 
duke@435:     free(tmp_path);
duke@435:     return result;
duke@435: }
duke@435: 
duke@435: 
duke@435: /* Store the name of the executable once computed */
duke@435: static char *execname = NULL;
duke@435: 
duke@435: /*
duke@435:  * Compute the name of the executable
duke@435:  *
duke@435:  * In order to re-exec securely we need the absolute path of the
duke@435:  * executable. On Solaris getexecname(3c) may not return an absolute
duke@435:  * path so we use dladdr to get the filename of the executable and
duke@435:  * then use realpath to derive an absolute path. From Solaris 9
duke@435:  * onwards the filename returned in DL_info structure from dladdr is
duke@435:  * an absolute pathname so technically realpath isn't required.
duke@435:  * On Linux we read the executable name from /proc/self/exe.
duke@435:  * As a fallback, and for platforms other than Solaris and Linux,
duke@435:  * we use FindExecName to compute the executable name.
duke@435:  */
duke@435: static char *
duke@435: SetExecname(char **argv)
duke@435: {
duke@435:     char* exec_path = NULL;
duke@435: 
duke@435:     if (execname != NULL)       /* Already determined */
duke@435:         return (execname);
duke@435: 
duke@435: #if defined(__sun)
duke@435:     {
duke@435:         Dl_info dlinfo;
duke@435:         if (dladdr((void*)&SetExecname, &dlinfo)) {
duke@435:             char *resolved = (char*)MemAlloc(PATH_MAX+1);
duke@435:             if (resolved != NULL) {
duke@435:                 exec_path = realpath(dlinfo.dli_fname, resolved);
duke@435:                 if (exec_path == NULL) {
duke@435:                     free(resolved);
duke@435:                 }
duke@435:             }
duke@435:         }
duke@435:     }
duke@435: #elif defined(__linux__)
duke@435:     {
duke@435:         const char* self = "/proc/self/exe";
duke@435:         char buf[PATH_MAX+1];
duke@435:         int len = readlink(self, buf, PATH_MAX);
duke@435:         if (len >= 0) {
duke@435:             buf[len] = '\0';            /* readlink doesn't nul terminate */
duke@435:             exec_path = strdup(buf);
duke@435:         }
duke@435:     }
duke@435: #else /* !__sun && !__linux */
duke@435:     {
duke@435:         /* Not implemented */
duke@435:     }
duke@435: #endif
duke@435: 
duke@435:     if (exec_path == NULL) {
duke@435:         exec_path = FindExecName(argv[0]);
duke@435:     }
duke@435:     execname = exec_path;
duke@435:     return exec_path;
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Return the name of the executable.  Used in java_md.c to find the JRE area.
duke@435:  */
duke@435: static char *
duke@435: GetExecname() {
duke@435:   return execname;
duke@435: }
duke@435: 
duke@435: void ReportErrorMessage(char * message, jboolean always) {
duke@435:   if (always) {
duke@435:     fprintf(stderr, "%s\n", message);
duke@435:   }
duke@435: }
duke@435: 
duke@435: void ReportErrorMessage2(char * format, char * string, jboolean always) {
duke@435:   if (always) {
duke@435:     fprintf(stderr, format, string);
duke@435:     fprintf(stderr, "\n");
duke@435:   }
duke@435: }
duke@435: 
duke@435: void  ReportExceptionDescription(JNIEnv * env) {
duke@435:   (*env)->ExceptionDescribe(env);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Return JNI_TRUE for an option string that has no effect but should
duke@435:  * _not_ be passed on to the vm; return JNI_FALSE otherwise.  On
duke@435:  * Solaris SPARC, this screening needs to be done if:
duke@435:  * 1) LD_LIBRARY_PATH does _not_ need to be reset and
duke@435:  * 2) -d32 or -d64 is passed to a binary with a matching data model
duke@435:  *    (the exec in SetLibraryPath removes -d<n> options and points the
duke@435:  *    exec to the proper binary).  When this exec is not done, these options
duke@435:  *    would end up getting passed onto the vm.
duke@435:  */
duke@435: jboolean RemovableMachineDependentOption(char * option) {
duke@435:   /*
duke@435:    * Unconditionally remove both -d32 and -d64 options since only
duke@435:    * the last such options has an effect; e.g.
duke@435:    * java -d32 -d64 -d32 -version
duke@435:    * is equivalent to
duke@435:    * java -d32 -version
duke@435:    */
duke@435: 
duke@435:   if( (strcmp(option, "-d32")  == 0 ) ||
duke@435:       (strcmp(option, "-d64")  == 0 ))
duke@435:     return JNI_TRUE;
duke@435:   else
duke@435:     return JNI_FALSE;
duke@435: }
duke@435: 
duke@435: void PrintMachineDependentOptions() {
duke@435:       fprintf(stdout,
duke@435:         "    -d32          use a 32-bit data model if available\n"
duke@435:         "\n"
duke@435:         "    -d64          use a 64-bit data model if available\n");
duke@435:       return;
duke@435: }
duke@435: 
duke@435: #ifndef GAMMA  /* gamma launcher does not have ergonomics */
duke@435: 
duke@435: /*
duke@435:  * The following methods (down to ServerClassMachine()) answer
duke@435:  * the question about whether a machine is a "server-class"
duke@435:  * machine.  A server-class machine is loosely defined as one
duke@435:  * with 2 or more processors and 2 gigabytes or more physical
duke@435:  * memory.  The definition of a processor is a physical package,
duke@435:  * not a hyperthreaded chip masquerading as a multi-processor.
duke@435:  * The definition of memory is also somewhat fuzzy, since x86
duke@435:  * machines seem not to report all the memory in their DIMMs, we
duke@435:  * think because of memory mapping of graphics cards, etc.
duke@435:  *
duke@435:  * This code is somewhat more confused with #ifdef's than we'd
duke@435:  * like because this file is used by both Solaris and Linux
duke@435:  * platforms, and so needs to be parameterized for SPARC and
duke@435:  * i586 hardware.  The other Linux platforms (amd64 and ia64)
duke@435:  * don't even ask this question, because they only come with
duke@435:  * server JVMs.  */
duke@435: 
duke@435: # define KB (1024UL)
duke@435: # define MB (1024UL * KB)
duke@435: # define GB (1024UL * MB)
duke@435: 
duke@435: /* Compute physical memory by asking the OS */
duke@435: uint64_t
duke@435: physical_memory(void) {
duke@435:   const uint64_t pages     = (uint64_t) sysconf(_SC_PHYS_PAGES);
duke@435:   const uint64_t page_size = (uint64_t) sysconf(_SC_PAGESIZE);
duke@435:   const uint64_t result    = pages * page_size;
duke@435: # define UINT64_FORMAT "%" PRIu64
duke@435: 
duke@435:   if (_launcher_debug) {
duke@435:     printf("pages: " UINT64_FORMAT
duke@435:            "  page_size: " UINT64_FORMAT
duke@435:            "  physical memory: " UINT64_FORMAT " (%.3fGB)\n",
duke@435:            pages, page_size, result, result / (double) GB);
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #if defined(__sun) && defined(__sparc)
duke@435: 
duke@435: /* Methods for solaris-sparc: these are easy. */
duke@435: 
duke@435: /* Ask the OS how many processors there are. */
duke@435: unsigned long
duke@435: physical_processors(void) {
duke@435:   const unsigned long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
duke@435: 
duke@435:   if (_launcher_debug) {
duke@435:     printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
duke@435:   }
duke@435:   return sys_processors;
duke@435: }
duke@435: 
duke@435: /* The solaris-sparc version of the "server-class" predicate. */
duke@435: jboolean
duke@435: solaris_sparc_ServerClassMachine(void) {
duke@435:   jboolean            result            = JNI_FALSE;
duke@435:   /* How big is a server class machine? */
duke@435:   const unsigned long server_processors = 2UL;
duke@435:   const uint64_t      server_memory     = 2UL * GB;
duke@435:   const uint64_t      actual_memory     = physical_memory();
duke@435: 
duke@435:   /* Is this a server class machine? */
duke@435:   if (actual_memory >= server_memory) {
duke@435:     const unsigned long actual_processors = physical_processors();
duke@435:     if (actual_processors >= server_processors) {
duke@435:       result = JNI_TRUE;
duke@435:     }
duke@435:   }
duke@435:   if (_launcher_debug) {
duke@435:     printf("solaris_" ARCH "_ServerClassMachine: %s\n",
duke@435:            (result == JNI_TRUE ? "JNI_TRUE" : "JNI_FALSE"));
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #endif /* __sun && __sparc */
duke@435: 
duke@435: #if defined(__sun) && defined(i586)
duke@435: 
duke@435: /*
duke@435:  * A utility method for asking the CPU about itself.
duke@435:  * There's a corresponding version of linux-i586
duke@435:  * because the compilers are different.
duke@435:  */
duke@435: void
duke@435: get_cpuid(uint32_t arg,
duke@435:           uint32_t* eaxp,
duke@435:           uint32_t* ebxp,
duke@435:           uint32_t* ecxp,
duke@435:           uint32_t* edxp) {
duke@435: #ifdef _LP64
duke@435:   asm(
duke@435:   /* rbx is a callee-saved register */
duke@435:       " movq    %rbx, %r11  \n"
duke@435:   /* rdx and rcx are 3rd and 4th argument registers */
duke@435:       " movq    %rdx, %r10  \n"
duke@435:       " movq    %rcx, %r9   \n"
duke@435:       " movl    %edi, %eax  \n"
duke@435:       " cpuid               \n"
duke@435:       " movl    %eax, (%rsi)\n"
duke@435:       " movl    %ebx, (%r10)\n"
duke@435:       " movl    %ecx, (%r9) \n"
duke@435:       " movl    %edx, (%r8) \n"
duke@435:   /* Restore rbx */
duke@435:       " movq    %r11, %rbx");
duke@435: #else
duke@435:   /* EBX is a callee-saved register */
duke@435:   asm(" pushl   %ebx");
duke@435:   /* Need ESI for storing through arguments */
duke@435:   asm(" pushl   %esi");
duke@435:   asm(" movl    8(%ebp), %eax   \n"
duke@435:       " cpuid                   \n"
duke@435:       " movl    12(%ebp), %esi  \n"
duke@435:       " movl    %eax, (%esi)    \n"
duke@435:       " movl    16(%ebp), %esi  \n"
duke@435:       " movl    %ebx, (%esi)    \n"
duke@435:       " movl    20(%ebp), %esi  \n"
duke@435:       " movl    %ecx, (%esi)    \n"
duke@435:       " movl    24(%ebp), %esi  \n"
duke@435:       " movl    %edx, (%esi)      ");
duke@435:   /* Restore ESI and EBX */
duke@435:   asm(" popl    %esi");
duke@435:   /* Restore EBX */
duke@435:   asm(" popl    %ebx");
duke@435: #endif
duke@435: }
duke@435: 
duke@435: #endif /* __sun && i586 */
duke@435: 
duke@435: #if defined(__linux__) && defined(i586)
duke@435: 
duke@435: /*
duke@435:  * A utility method for asking the CPU about itself.
duke@435:  * There's a corresponding version of solaris-i586
duke@435:  * because the compilers are different.
duke@435:  */
duke@435: void
duke@435: get_cpuid(uint32_t arg,
duke@435:           uint32_t* eaxp,
duke@435:           uint32_t* ebxp,
duke@435:           uint32_t* ecxp,
duke@435:           uint32_t* edxp) {
duke@435: #ifdef _LP64
duke@435:   __asm__ volatile (/* Instructions */
duke@435:                     "   movl    %4, %%eax  \n"
duke@435:                     "   cpuid              \n"
duke@435:                     "   movl    %%eax, (%0)\n"
duke@435:                     "   movl    %%ebx, (%1)\n"
duke@435:                     "   movl    %%ecx, (%2)\n"
duke@435:                     "   movl    %%edx, (%3)\n"
duke@435:                     : /* Outputs */
duke@435:                     : /* Inputs */
duke@435:                     "r" (eaxp),
duke@435:                     "r" (ebxp),
duke@435:                     "r" (ecxp),
duke@435:                     "r" (edxp),
duke@435:                     "r" (arg)
duke@435:                     : /* Clobbers */
duke@435:                     "%rax", "%rbx", "%rcx", "%rdx", "memory"
duke@435:                     );
duke@435: #else
duke@435:   uint32_t value_of_eax = 0;
duke@435:   uint32_t value_of_ebx = 0;
duke@435:   uint32_t value_of_ecx = 0;
duke@435:   uint32_t value_of_edx = 0;
duke@435:   __asm__ volatile (/* Instructions */
duke@435:                         /* ebx is callee-save, so push it */
duke@435:                         /* even though it's in the clobbers section */
duke@435:                     "   pushl   %%ebx      \n"
duke@435:                     "   movl    %4, %%eax  \n"
duke@435:                     "   cpuid              \n"
duke@435:                     "   movl    %%eax, %0  \n"
duke@435:                     "   movl    %%ebx, %1  \n"
duke@435:                     "   movl    %%ecx, %2  \n"
duke@435:                     "   movl    %%edx, %3  \n"
duke@435:                         /* restore ebx */
duke@435:                     "   popl    %%ebx      \n"
duke@435: 
duke@435:                     : /* Outputs */
duke@435:                     "=m" (value_of_eax),
duke@435:                     "=m" (value_of_ebx),
duke@435:                     "=m" (value_of_ecx),
duke@435:                     "=m" (value_of_edx)
duke@435:                     : /* Inputs */
duke@435:                     "m" (arg)
duke@435:                     : /* Clobbers */
duke@435:                     "%eax", "%ebx", "%ecx", "%edx"
duke@435:                     );
duke@435:   *eaxp = value_of_eax;
duke@435:   *ebxp = value_of_ebx;
duke@435:   *ecxp = value_of_ecx;
duke@435:   *edxp = value_of_edx;
duke@435: #endif
duke@435: }
duke@435: 
duke@435: #endif /* __linux__ && i586 */
duke@435: 
duke@435: #ifdef i586
duke@435: /*
duke@435:  * Routines shared by solaris-i586 and linux-i586.
duke@435:  */
duke@435: 
duke@435: enum HyperThreadingSupport_enum {
duke@435:   hts_supported        =  1,
duke@435:   hts_too_soon_to_tell =  0,
duke@435:   hts_not_supported    = -1,
duke@435:   hts_not_pentium4     = -2,
duke@435:   hts_not_intel        = -3
duke@435: };
duke@435: typedef enum HyperThreadingSupport_enum HyperThreadingSupport;
duke@435: 
duke@435: /* Determine if hyperthreading is supported */
duke@435: HyperThreadingSupport
duke@435: hyperthreading_support(void) {
duke@435:   HyperThreadingSupport result = hts_too_soon_to_tell;
duke@435:   /* Bits 11 through 8 is family processor id */
duke@435: # define FAMILY_ID_SHIFT 8
duke@435: # define FAMILY_ID_MASK 0xf
duke@435:   /* Bits 23 through 20 is extended family processor id */
duke@435: # define EXT_FAMILY_ID_SHIFT 20
duke@435: # define EXT_FAMILY_ID_MASK 0xf
duke@435:   /* Pentium 4 family processor id */
duke@435: # define PENTIUM4_FAMILY_ID 0xf
duke@435:   /* Bit 28 indicates Hyper-Threading Technology support */
duke@435: # define HT_BIT_SHIFT 28
duke@435: # define HT_BIT_MASK 1
duke@435:   uint32_t vendor_id[3] = { 0U, 0U, 0U };
duke@435:   uint32_t value_of_eax = 0U;
duke@435:   uint32_t value_of_edx = 0U;
duke@435:   uint32_t dummy        = 0U;
duke@435: 
duke@435:   /* Yes, this is supposed to be [0], [2], [1] */
duke@435:   get_cpuid(0, &dummy, &vendor_id[0], &vendor_id[2], &vendor_id[1]);
duke@435:   if (_launcher_debug) {
duke@435:     printf("vendor: %c %c %c %c %c %c %c %c %c %c %c %c \n",
duke@435:            ((vendor_id[0] >>  0) & 0xff),
duke@435:            ((vendor_id[0] >>  8) & 0xff),
duke@435:            ((vendor_id[0] >> 16) & 0xff),
duke@435:            ((vendor_id[0] >> 24) & 0xff),
duke@435:            ((vendor_id[1] >>  0) & 0xff),
duke@435:            ((vendor_id[1] >>  8) & 0xff),
duke@435:            ((vendor_id[1] >> 16) & 0xff),
duke@435:            ((vendor_id[1] >> 24) & 0xff),
duke@435:            ((vendor_id[2] >>  0) & 0xff),
duke@435:            ((vendor_id[2] >>  8) & 0xff),
duke@435:            ((vendor_id[2] >> 16) & 0xff),
duke@435:            ((vendor_id[2] >> 24) & 0xff));
duke@435:   }
duke@435:   get_cpuid(1, &value_of_eax, &dummy, &dummy, &value_of_edx);
duke@435:   if (_launcher_debug) {
duke@435:     printf("value_of_eax: 0x%x  value_of_edx: 0x%x\n",
duke@435:            value_of_eax, value_of_edx);
duke@435:   }
duke@435:   if ((((value_of_eax >> FAMILY_ID_SHIFT) & FAMILY_ID_MASK) == PENTIUM4_FAMILY_ID) ||
duke@435:       (((value_of_eax >> EXT_FAMILY_ID_SHIFT) & EXT_FAMILY_ID_MASK) != 0)) {
duke@435:     if ((((vendor_id[0] >>  0) & 0xff) == 'G') &&
duke@435:         (((vendor_id[0] >>  8) & 0xff) == 'e') &&
duke@435:         (((vendor_id[0] >> 16) & 0xff) == 'n') &&
duke@435:         (((vendor_id[0] >> 24) & 0xff) == 'u') &&
duke@435:         (((vendor_id[1] >>  0) & 0xff) == 'i') &&
duke@435:         (((vendor_id[1] >>  8) & 0xff) == 'n') &&
duke@435:         (((vendor_id[1] >> 16) & 0xff) == 'e') &&
duke@435:         (((vendor_id[1] >> 24) & 0xff) == 'I') &&
duke@435:         (((vendor_id[2] >>  0) & 0xff) == 'n') &&
duke@435:         (((vendor_id[2] >>  8) & 0xff) == 't') &&
duke@435:         (((vendor_id[2] >> 16) & 0xff) == 'e') &&
duke@435:         (((vendor_id[2] >> 24) & 0xff) == 'l')) {
duke@435:       if (((value_of_edx >> HT_BIT_SHIFT) & HT_BIT_MASK) == HT_BIT_MASK) {
duke@435:         if (_launcher_debug) {
duke@435:           printf("Hyperthreading supported\n");
duke@435:         }
duke@435:         result = hts_supported;
duke@435:       } else {
duke@435:         if (_launcher_debug) {
duke@435:           printf("Hyperthreading not supported\n");
duke@435:         }
duke@435:         result = hts_not_supported;
duke@435:       }
duke@435:     } else {
duke@435:       if (_launcher_debug) {
duke@435:         printf("Not GenuineIntel\n");
duke@435:       }
duke@435:       result = hts_not_intel;
duke@435:     }
duke@435:   } else {
duke@435:     if (_launcher_debug) {
duke@435:       printf("not Pentium 4 or extended\n");
duke@435:     }
duke@435:     result = hts_not_pentium4;
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: /* Determine how many logical processors there are per CPU */
duke@435: unsigned int
duke@435: logical_processors_per_package(void) {
duke@435:   /*
duke@435:    * After CPUID with EAX==1, register EBX bits 23 through 16
duke@435:    * indicate the number of logical processors per package
duke@435:    */
duke@435: # define NUM_LOGICAL_SHIFT 16
duke@435: # define NUM_LOGICAL_MASK 0xff
duke@435:   unsigned int result                        = 1U;
duke@435:   const HyperThreadingSupport hyperthreading = hyperthreading_support();
duke@435: 
duke@435:   if (hyperthreading == hts_supported) {
duke@435:     uint32_t value_of_ebx = 0U;
duke@435:     uint32_t dummy        = 0U;
duke@435: 
duke@435:     get_cpuid(1, &dummy, &value_of_ebx, &dummy, &dummy);
duke@435:     result = (value_of_ebx >> NUM_LOGICAL_SHIFT) & NUM_LOGICAL_MASK;
duke@435:     if (_launcher_debug) {
duke@435:       printf("logical processors per package: %u\n", result);
duke@435:     }
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: /* Compute the number of physical processors, not logical processors */
duke@435: unsigned long
duke@435: physical_processors(void) {
duke@435:   const long sys_processors = sysconf(_SC_NPROCESSORS_CONF);
duke@435:   unsigned long result      = sys_processors;
duke@435: 
duke@435:   if (_launcher_debug) {
duke@435:     printf("sysconf(_SC_NPROCESSORS_CONF): %lu\n", sys_processors);
duke@435:   }
duke@435:   if (sys_processors > 1) {
duke@435:     unsigned int logical_processors = logical_processors_per_package();
duke@435:     if (logical_processors > 1) {
duke@435:       result = (unsigned long) sys_processors / logical_processors;
duke@435:     }
duke@435:   }
duke@435:   if (_launcher_debug) {
duke@435:     printf("physical processors: %lu\n", result);
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #endif /* i586 */
duke@435: 
duke@435: #if defined(__sun) && defined(i586)
duke@435: 
duke@435: /* The definition of a server-class machine for solaris-i586/amd64 */
duke@435: jboolean
duke@435: solaris_i586_ServerClassMachine(void) {
duke@435:   jboolean            result            = JNI_FALSE;
duke@435:   /* How big is a server class machine? */
duke@435:   const unsigned long server_processors = 2UL;
duke@435:   const uint64_t      server_memory     = 2UL * GB;
duke@435:   /*
duke@435:    * We seem not to get our full complement of memory.
duke@435:    *     We allow some part (1/8?) of the memory to be "missing",
duke@435:    *     based on the sizes of DIMMs, and maybe graphics cards.
duke@435:    */
duke@435:   const uint64_t      missing_memory    = 256UL * MB;
duke@435:   const uint64_t      actual_memory     = physical_memory();
duke@435: 
duke@435:   /* Is this a server class machine? */
duke@435:   if (actual_memory >= (server_memory - missing_memory)) {
duke@435:     const unsigned long actual_processors = physical_processors();
duke@435:     if (actual_processors >= server_processors) {
duke@435:       result = JNI_TRUE;
duke@435:     }
duke@435:   }
duke@435:   if (_launcher_debug) {
duke@435:     printf("solaris_" ARCH "_ServerClassMachine: %s\n",
duke@435:            (result == JNI_TRUE ? "true" : "false"));
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #endif /* __sun && i586 */
duke@435: 
duke@435: #if defined(__linux__) && defined(i586)
duke@435: 
duke@435: /* The definition of a server-class machine for linux-i586 */
duke@435: jboolean
duke@435: linux_i586_ServerClassMachine(void) {
duke@435:   jboolean            result            = JNI_FALSE;
duke@435:   /* How big is a server class machine? */
duke@435:   const unsigned long server_processors = 2UL;
duke@435:   const uint64_t      server_memory     = 2UL * GB;
duke@435:   /*
duke@435:    * We seem not to get our full complement of memory.
duke@435:    *     We allow some part (1/8?) of the memory to be "missing",
duke@435:    *     based on the sizes of DIMMs, and maybe graphics cards.
duke@435:    */
duke@435:   const uint64_t      missing_memory    = 256UL * MB;
duke@435:   const uint64_t      actual_memory     = physical_memory();
duke@435: 
duke@435:   /* Is this a server class machine? */
duke@435:   if (actual_memory >= (server_memory - missing_memory)) {
duke@435:     const unsigned long actual_processors = physical_processors();
duke@435:     if (actual_processors >= server_processors) {
duke@435:       result = JNI_TRUE;
duke@435:     }
duke@435:   }
duke@435:   if (_launcher_debug) {
duke@435:     printf("linux_" ARCH "_ServerClassMachine: %s\n",
duke@435:            (result == JNI_TRUE ? "true" : "false"));
duke@435:   }
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #endif /* __linux__ && i586 */
duke@435: 
duke@435: /* Dispatch to the platform-specific definition of "server-class" */
duke@435: jboolean
duke@435: ServerClassMachine(void) {
duke@435:   jboolean result = JNI_FALSE;
duke@435: #if   defined(__sun) && defined(__sparc)
duke@435:   result = solaris_sparc_ServerClassMachine();
duke@435: #elif defined(__sun) && defined(i586)
duke@435:   result = solaris_i586_ServerClassMachine();
duke@435: #elif defined(__linux__) && defined(i586)
duke@435:   result = linux_i586_ServerClassMachine();
duke@435: #else
duke@435:   if (_launcher_debug) {
duke@435:     printf("ServerClassMachine: returns default value of %s\n",
duke@435:            (result == JNI_TRUE ? "true" : "false"));
duke@435:   }
duke@435: #endif
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: #endif /* ifndef GAMMA */
duke@435: 
duke@435: #ifndef GAMMA /* gamma launcher does not choose JDK/JRE/JVM */
duke@435: 
duke@435: /*
duke@435:  *      Since using the file system as a registry is a bit risky, perform
duke@435:  *      additional sanity checks on the identified directory to validate
duke@435:  *      it as a valid jre/sdk.
duke@435:  *
duke@435:  *      Return 0 if the tests fail; otherwise return non-zero (true).
duke@435:  *
duke@435:  *      Note that checking for anything more than the existence of an
duke@435:  *      executable object at bin/java relative to the path being checked
duke@435:  *      will break the regression tests.
duke@435:  */
duke@435: static int
duke@435: CheckSanity(char *path, char *dir)
duke@435: {
duke@435:     char    buffer[PATH_MAX];
duke@435: 
duke@435:     if (strlen(path) + strlen(dir) + 11 > PATH_MAX)
duke@435:         return (0);     /* Silently reject "impossibly" long paths */
duke@435: 
duke@435:     (void)strcat(strcat(strcat(strcpy(buffer, path), "/"), dir), "/bin/java");
duke@435:     return ((access(buffer, X_OK) == 0) ? 1 : 0);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  *      Determine if there is an acceptable JRE in the directory dirname.
duke@435:  *      Upon locating the "best" one, return a fully qualified path to
duke@435:  *      it. "Best" is defined as the most advanced JRE meeting the
duke@435:  *      constraints contained in the manifest_info. If no JRE in this
duke@435:  *      directory meets the constraints, return NULL.
duke@435:  *
duke@435:  *      Note that we don't check for errors in reading the directory
duke@435:  *      (which would be done by checking errno).  This is because it
duke@435:  *      doesn't matter if we get an error reading the directory, or
duke@435:  *      we just don't find anything interesting in the directory.  We
duke@435:  *      just return NULL in either case.
duke@435:  *
duke@435:  *      The historical names of j2sdk and j2re were changed to jdk and
duke@435:  *      jre respecively as part of the 1.5 rebranding effort.  Since the
duke@435:  *      former names are legacy on Linux, they must be recognized for
duke@435:  *      all time.  Fortunately, this is a minor cost.
duke@435:  */
duke@435: static char
duke@435: *ProcessDir(manifest_info *info, char *dirname)
duke@435: {
duke@435:     DIR     *dirp;
duke@435:     struct dirent *dp;
duke@435:     char    *best = NULL;
duke@435:     int     offset;
duke@435:     int     best_offset = 0;
duke@435:     char    *ret_str = NULL;
duke@435:     char    buffer[PATH_MAX];
duke@435: 
duke@435:     if ((dirp = opendir(dirname)) == NULL)
duke@435:         return (NULL);
duke@435: 
duke@435:     do {
duke@435:         if ((dp = readdir(dirp)) != NULL) {
duke@435:             offset = 0;
duke@435:             if ((strncmp(dp->d_name, "jre", 3) == 0) ||
duke@435:                 (strncmp(dp->d_name, "jdk", 3) == 0))
duke@435:                 offset = 3;
duke@435:             else if (strncmp(dp->d_name, "j2re", 4) == 0)
duke@435:                 offset = 4;
duke@435:             else if (strncmp(dp->d_name, "j2sdk", 5) == 0)
duke@435:                 offset = 5;
duke@435:             if (offset > 0) {
duke@435:                 if ((acceptable_release(dp->d_name + offset,
duke@435:                     info->jre_version)) && CheckSanity(dirname, dp->d_name))
duke@435:                     if ((best == NULL) || (exact_version_id(
duke@435:                       dp->d_name + offset, best + best_offset) > 0)) {
duke@435:                         if (best != NULL)
duke@435:                             free(best);
duke@435:                         best = strdup(dp->d_name);
duke@435:                         best_offset = offset;
duke@435:                     }
duke@435:             }
duke@435:         }
duke@435:     } while (dp != NULL);
duke@435:     (void) closedir(dirp);
duke@435:     if (best == NULL)
duke@435:         return (NULL);
duke@435:     else {
duke@435:         ret_str = MemAlloc(strlen(dirname) + strlen(best) + 2);
duke@435:         ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best);
duke@435:         free(best);
duke@435:         return (ret_str);
duke@435:     }
duke@435: }
duke@435: 
duke@435: /*
duke@435:  *      This is the global entry point. It examines the host for the optimal
duke@435:  *      JRE to be used by scanning a set of directories.  The set of directories
duke@435:  *      is platform dependent and can be overridden by the environment
duke@435:  *      variable JAVA_VERSION_PATH.
duke@435:  *
duke@435:  *      This routine itself simply determines the set of appropriate
duke@435:  *      directories before passing control onto ProcessDir().
duke@435:  */
duke@435: char*
duke@435: LocateJRE(manifest_info* info)
duke@435: {
duke@435:     char        *path;
duke@435:     char        *home;
duke@435:     char        *target = NULL;
duke@435:     char        *dp;
duke@435:     char        *cp;
duke@435: 
duke@435:     /*
duke@435:      * Start by getting JAVA_VERSION_PATH
duke@435:      */
duke@435:     if (info->jre_restrict_search)
duke@435:         path = strdup(system_dir);
duke@435:     else if ((path = getenv("JAVA_VERSION_PATH")) != NULL)
duke@435:         path = strdup(path);
duke@435:     else
duke@435:         if ((home = getenv("HOME")) != NULL) {
duke@435:             path = (char *)MemAlloc(strlen(home) + 13);
duke@435:             path = strcat(strcat(strcat(strcpy(path, home),
duke@435:                 user_dir), ":"), system_dir);
duke@435:         } else
duke@435:             path = strdup(system_dir);
duke@435: 
duke@435:     /*
duke@435:      * Step through each directory on the path. Terminate the scan with
duke@435:      * the first directory with an acceptable JRE.
duke@435:      */
duke@435:     cp = dp = path;
duke@435:     while (dp != NULL) {
duke@435:         cp = strchr(dp, (int)':');
duke@435:         if (cp != NULL)
duke@435:             *cp = (char)NULL;
duke@435:         if ((target = ProcessDir(info, dp)) != NULL)
duke@435:             break;
duke@435:         dp = cp;
duke@435:         if (dp != NULL)
duke@435:             dp++;
duke@435:     }
duke@435:     free(path);
duke@435:     return (target);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * Given a path to a jre to execute, this routine checks if this process
duke@435:  * is indeed that jre.  If not, it exec's that jre.
duke@435:  *
duke@435:  * We want to actually check the paths rather than just the version string
duke@435:  * built into the executable, so that given version specification (and
duke@435:  * JAVA_VERSION_PATH) will yield the exact same Java environment, regardless
duke@435:  * of the version of the arbitrary launcher we start with.
duke@435:  */
duke@435: void
duke@435: ExecJRE(char *jre, char **argv)
duke@435: {
duke@435:     char    wanted[PATH_MAX];
duke@435:     char    *execname;
duke@435:     char    *progname;
duke@435: 
duke@435:     /*
duke@435:      * Resolve the real path to the directory containing the selected JRE.
duke@435:      */
duke@435:     if (realpath(jre, wanted) == NULL) {
duke@435:         fprintf(stderr, "Unable to resolve %s\n", jre);
duke@435:         exit(1);
duke@435:     }
duke@435: 
duke@435:     /*
duke@435:      * Resolve the real path to the currently running launcher.
duke@435:      */
duke@435:     execname = SetExecname(argv);
duke@435:     if (execname == NULL) {
duke@435:         fprintf(stderr, "Unable to resolve current executable\n");
duke@435:         exit(1);
duke@435:     }
duke@435: 
duke@435:     /*
duke@435:      * If the path to the selected JRE directory is a match to the initial
duke@435:      * portion of the path to the currently executing JRE, we have a winner!
duke@435:      * If so, just return.
duke@435:      */
duke@435:     if (strncmp(wanted, execname, strlen(wanted)) == 0)
duke@435:         return;                 /* I am the droid you were looking for */
duke@435: 
duke@435:     /*
duke@435:      * If this isn't the selected version, exec the selected version.
duke@435:      */
duke@435: #ifdef JAVA_ARGS  /* javac, jar and friends. */
duke@435:     progname = "java";
duke@435: #else             /* java, oldjava, javaw and friends */
duke@435: #ifdef PROGNAME
duke@435:     progname = PROGNAME;
duke@435: #else
duke@435:     progname = *argv;
duke@435:     if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
duke@435:         progname = s + 1;
duke@435:     }
duke@435: #endif /* PROGNAME */
duke@435: #endif /* JAVA_ARGS */
duke@435: 
duke@435:     /*
duke@435:      * This should never happen (because of the selection code in SelectJRE),
duke@435:      * but check for "impossibly" long path names just because buffer overruns
duke@435:      * can be so deadly.
duke@435:      */
duke@435:     if (strlen(wanted) + strlen(progname) + 6 > PATH_MAX) {
duke@435:         fprintf(stderr, "Path length exceeds maximum length (PATH_MAX)\n");
duke@435:         exit(1);
duke@435:     }
duke@435: 
duke@435:     /*
duke@435:      * Construct the path and exec it.
duke@435:      */
duke@435:     (void)strcat(strcat(wanted, "/bin/"), progname);
duke@435:     argv[0] = progname;
duke@435:     if (_launcher_debug) {
duke@435:         int i;
duke@435:         printf("execv(\"%s\"", wanted);
duke@435:         for (i = 0; argv[i] != NULL; i++)
duke@435:             printf(", \"%s\"", argv[i]);
duke@435:         printf(")\n");
duke@435:     }
duke@435:     execv(wanted, argv);
duke@435:     fprintf(stderr, "Exec of %s failed\n", wanted);
duke@435:     exit(1);
duke@435: }
duke@435: 
duke@435: #endif /* ifndef GAMMA */
duke@435: 
duke@435: /*
duke@435:  * "Borrowed" from Solaris 10 where the unsetenv() function is being added
duke@435:  * to libc thanks to SUSv3 (Standard Unix Specification, version 3). As
duke@435:  * such, in the fullness of time this will appear in libc on all relevant
duke@435:  * Solaris/Linux platforms and maybe even the Windows platform.  At that
duke@435:  * time, this stub can be removed.
duke@435:  *
duke@435:  * This implementation removes the environment locking for multithreaded
duke@435:  * applications.  (We don't have access to these mutexes within libc and
duke@435:  * the launcher isn't multithreaded.)  Note that what remains is platform
duke@435:  * independent, because it only relies on attributes that a POSIX environment
duke@435:  * defines.
duke@435:  *
duke@435:  * Returns 0 on success, -1 on failure.
duke@435:  *
duke@435:  * Also removed was the setting of errno.  The only value of errno set
duke@435:  * was EINVAL ("Invalid Argument").
duke@435:  */
duke@435: 
duke@435: /*
duke@435:  * s1(environ) is name=value
duke@435:  * s2(name) is name(not the form of name=value).
duke@435:  * if names match, return value of 1, else return 0
duke@435:  */
duke@435: static int
duke@435: match_noeq(const char *s1, const char *s2)
duke@435: {
duke@435:         while (*s1 == *s2++) {
duke@435:                 if (*s1++ == '=')
duke@435:                         return (1);
duke@435:         }
duke@435:         if (*s1 == '=' && s2[-1] == '\0')
duke@435:                 return (1);
duke@435:         return (0);
duke@435: }
duke@435: 
duke@435: /*
duke@435:  * added for SUSv3 standard
duke@435:  *
duke@435:  * Delete entry from environ.
duke@435:  * Do not free() memory!  Other threads may be using it.
duke@435:  * Keep it around forever.
duke@435:  */
duke@435: static int
duke@435: borrowed_unsetenv(const char *name)
duke@435: {
duke@435:         long    idx;            /* index into environ */
duke@435: 
duke@435:         if (name == NULL || *name == '\0' ||
duke@435:             strchr(name, '=') != NULL) {
duke@435:                 return (-1);
duke@435:         }
duke@435: 
duke@435:         for (idx = 0; environ[idx] != NULL; idx++) {
duke@435:                 if (match_noeq(environ[idx], name))
duke@435:                         break;
duke@435:         }
duke@435:         if (environ[idx] == NULL) {
duke@435:                 /* name not found but still a success */
duke@435:                 return (0);
duke@435:         }
duke@435:         /* squeeze up one entry */
duke@435:         do {
duke@435:                 environ[idx] = environ[idx+1];
duke@435:         } while (environ[++idx] != NULL);
duke@435: 
duke@435:         return (0);
duke@435: }
duke@435: /* --- End of "borrowed" code --- */
duke@435: 
duke@435: /*
duke@435:  * Wrapper for unsetenv() function.
duke@435:  */
duke@435: int
duke@435: UnsetEnv(char *name)
duke@435: {
duke@435:     return(borrowed_unsetenv(name));
duke@435: }
ksrini@823: /*
ksrini@823:  * The implementation for finding classes from the bootstrap
ksrini@823:  * class loader, refer to java.h
ksrini@823:  */
ksrini@823: static FindClassFromBootLoader_t *findBootClass = NULL;
ksrini@823: 
ksrini@823: jclass
ksrini@823: FindBootStrapClass(JNIEnv *env, const char* classname)
ksrini@823: {
ksrini@823:    if (findBootClass == NULL) {
ksrini@823:        findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT,
ksrini@823:           "JVM_FindClassFromBootLoader");
ksrini@823:        if (findBootClass == NULL) {
ksrini@823:            fprintf(stderr, "Error: could load method JVM_FindClassFromBootLoader");
ksrini@823:            return NULL;
ksrini@823:        }
ksrini@823:    }
ksrini@823:    return findBootClass(env, classname, JNI_FALSE);
ksrini@823: }
ksrini@823: