diff -r 2968675b413e -r cb2d0a362639 src/os/posix/launcher/java_md.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os/posix/launcher/java_md.c Thu Dec 02 05:45:54 2010 -0800 @@ -0,0 +1,1878 @@ +/* + * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + + +#include "java.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifndef GAMMA +#include "manifest_info.h" +#include "version_comp.h" +#endif + +#ifdef __linux__ +#include +#else +#include +#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 LIBARCH64NAME and LIBARCH32NAME. 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. + */ + +#ifndef LIBARCHNAME +# error "The macro LIBARCHNAME was not defined on the compile line" +#endif + +#ifdef __sun +# define DUAL_MODE +# ifndef LIBARCH32NAME +# error "The macro LIBARCH32NAME was not defined on the compile line" +# endif +# ifndef LIBARCH64NAME +# error "The macro LIBARCH64NAME was not defined on the compile line" +# endif +# include +# include +# include +#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); + +#ifndef GAMMA +const char * +GetArch() +{ + return LIBARCHNAME; +} +#endif /* ifndef GAMMA */ + +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 **)JLI_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)?LIBARCH64NAME:LIBARCH32NAME), JNI_TRUE)) { + goto EndDataModelSpeculate; + } + + /* + * Read in jvm.cfg for target data model and process vm + * selection options. + */ + if (ReadKnownVMs(jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), 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)?LIBARCH64NAME:LIBARCH32NAME)); + + } + 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 $JRE/lib/$LIBARCHNAME + * o $JRE/../lib/$LIBARCHNAME + * + * 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 = JLI_StringDup(jvmpath); + new_runpath = JLI_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)?"/"LIBARCH64NAME:"/.."):""), */ + + sprintf(new_runpath, "LD_LIBRARY_PATH=" + "%s:" + "%s/lib/%s:" + "%s/../lib/%s", + jvmpath, +#ifdef DUAL_MODE + jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME), + jrepath, ((wanted==64)?LIBARCH64NAME:LIBARCH32NAME) +#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/LIBARCH64NAME/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(JLI_MemAlloc(strlen(execname) + 1), execname); + char *olddir = oldexec; + char *oldbase = strrchr(oldexec, '/'); + + + newexec = JLI_MemAlloc(strlen(execname) + 20); + *oldbase++ = 0; + sprintf(newexec, "%s/%s/%s", olddir, + ((wanted==64) ? LIBARCH64NAME : ".."), oldbase); + argv[0] = newexec; + } +#endif + + (void)fflush(stdout); + (void)fflush(stderr); + 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 *) ARCH; /* 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 "/libjvm.so" where 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 /* ifndef GAMMA */ + + 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 /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 /* ifndef GAMMA */ +} + +/* + * 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 or ALT_JAVA_HOME environment variable to find JDK/JRE */ + char* java_home_var = getenv("ALT_JAVA_HOME"); + if (java_home_var == NULL) { + java_home_var = getenv("JAVA_HOME"); + } + if (java_home_var == NULL) { + printf("JAVA_HOME or ALT_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 /* ifndef 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 = JLI_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 = JLI_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; + } + + JLI_MemFree(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*)JLI_MemAlloc(PATH_MAX+1); + if (resolved != NULL) { + exec_path = realpath(dlinfo.dli_fname, resolved); + if (exec_path == NULL) { + JLI_MemFree(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 = JLI_StringDup(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 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 +/* + * 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_" LIBARCHNAME "_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 */ + " 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", "%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_" LIBARCHNAME "_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_" LIBARCHNAME "_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(NEVER_ACT_AS_SERVER_CLASS_MACHINE) + result = JNI_FALSE; +#elif defined(ALWAYS_ACT_AS_SERVER_CLASS_MACHINE) + result = JNI_TRUE; +#elif 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; +} + +/* + * 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 ((JLI_AcceptableRelease(dp->d_name + offset, + info->jre_version)) && CheckSanity(dirname, dp->d_name)) + if ((best == NULL) || (JLI_ExactVersionId( + dp->d_name + offset, best + best_offset) > 0)) { + if (best != NULL) + JLI_MemFree(best); + best = JLI_StringDup(dp->d_name); + best_offset = offset; + } + } + } + } while (dp != NULL); + (void) closedir(dirp); + if (best == NULL) + return (NULL); + else { + ret_str = JLI_MemAlloc(strlen(dirname) + strlen(best) + 2); + ret_str = strcat(strcat(strcpy(ret_str, dirname), "/"), best); + JLI_MemFree(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 = JLI_StringDup(system_dir); + else if ((path = getenv("JAVA_VERSION_PATH")) != NULL) + path = JLI_StringDup(path); + else + if ((home = getenv("HOME")) != NULL) { + path = (char *)JLI_MemAlloc(strlen(home) + strlen(system_dir) + + strlen(user_dir) + 2); + path = strcat(strcat(strcat(strcpy(path, home), + user_dir), ":"), system_dir); + } else + path = JLI_StringDup(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++; + } + JLI_MemFree(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("ReExec Command: %s (%s)\n", wanted, argv[0]); + printf("ReExec Args:"); + for (i = 1; argv[i] != NULL; i++) + printf(" %s", argv[i]); + printf("\n"); + } + (void)fflush(stdout); + (void)fflush(stderr); + execv(wanted, argv); + perror("execv()"); + 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)); +} + +/* --- Splash Screen shared library support --- */ + +static const char* SPLASHSCREEN_SO = "libsplashscreen.so"; + +static void* hSplashLib = NULL; + +void* SplashProcAddress(const char* name) { + if (!hSplashLib) { + hSplashLib = dlopen(SPLASHSCREEN_SO, RTLD_LAZY | RTLD_GLOBAL); + } + if (hSplashLib) { + void* sym = dlsym(hSplashLib, name); + return sym; + } else { + return NULL; + } +} + +void SplashFreeLibrary() { + if (hSplashLib) { + dlclose(hSplashLib); + hSplashLib = NULL; + } +} + +const char * +jlong_format_specifier() { + return "%lld"; +} + +/* + * Block current thread and continue execution in a new thread + */ +int +ContinueInNewThread(int (JNICALL *continuation)(void *), jlong stack_size, void * args) { + int rslt; +#ifdef __linux__ + pthread_t tid; + pthread_attr_t attr; + pthread_attr_init(&attr); + pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); + + if (stack_size > 0) { + pthread_attr_setstacksize(&attr, stack_size); + } + + if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) { + void * tmp; + pthread_join(tid, &tmp); + rslt = (int)tmp; + } else { + /* + * Continue execution in current thread if for some reason (e.g. out of + * memory/LWP) a new thread can't be created. This will likely fail + * later in continuation as JNI_CreateJavaVM needs to create quite a + * few new threads, anyway, just give it a try.. + */ + rslt = continuation(args); + } + + pthread_attr_destroy(&attr); +#else + thread_t tid; + long flags = 0; + if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) { + void * tmp; + thr_join(tid, NULL, &tmp); + rslt = (int)tmp; + } else { + /* See above. Continue in current thread if thr_create() failed */ + rslt = continuation(args); + } +#endif + return rslt; +} + +/* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */ +#define MAX_PID_STR_SZ 20 + +void SetJavaLauncherPlatformProps() { + /* Linux only */ +#ifdef __linux__ + const char *substr = "-Dsun.java.launcher.pid="; + char *pid_prop_str = (char *)JLI_MemAlloc(strlen(substr) + MAX_PID_STR_SZ + 1); + sprintf(pid_prop_str, "%s%d", substr, getpid()); + AddOption(pid_prop_str, NULL); +#endif +}