| /* |
| * Copyright (c) 1998, 2009, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 <dirent.h> |
| #include <dlfcn.h> |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include "manifest_info.h" |
| #include "version_comp.h" |
| |
| #ifdef __linux__ |
| #include <pthread.h> |
| #else |
| #include <thread.h> |
| #endif |
| |
| #define JVM_DLL "libjvm.so" |
| #define JAVA_DLL "libjava.so" |
| |
| /* |
| * 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. |
| */ |
| |
| #ifdef __solaris__ |
| # 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 <sys/systeminfo.h> |
| # include <sys/elf.h> |
| # include <stdio.h> |
| #endif |
| |
| /* pointer to environment */ |
| extern char **environ; |
| |
| /* |
| * 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 |
| |
| /* Store the name of the executable once computed */ |
| static char *execname = NULL; |
| |
| /* |
| * 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. |
| * |
| * Previously the launcher modified the LD_LIBRARY_PATH appropriately for the |
| * desired data model path, regardless if data models matched or not. The |
| * launcher subsequently exec'ed the desired executable, in order to make the |
| * LD_LIBRARY_PATH path available for the runtime linker. This is no longer the |
| * case, the launcher dlopens the target libjvm.so. All other required |
| * libraries are loaded by the runtime linker, by virtue of the $ORIGIN paths |
| * baked into the shared libraries, by the build infrastructure at compile time. |
| * |
| * Main |
| * (incoming argv) |
| * | |
| * \|/ |
| * SelectVersion |
| * (selects the JRE version, note: not data model) |
| * | |
| * \|/ |
| * CreateExecutionEnvironment |
| * (determines desired data model) |
| * | |
| * | |
| * \|/ |
| * Have Desired Model ? --> NO --> Is Dual-Mode ? --> NO --> Exit(with error) |
| * | | |
| * | | |
| * | \|/ |
| * | YES |
| * | | |
| * | | |
| * | \|/ |
| * | CheckJvmType |
| * | (removes -client, -server etc.) |
| * | | |
| * | | |
| * \|/ \|/ |
| * YES (find the desired executable and exec child) |
| * | | |
| * | | |
| * \|/ \|/ |
| * CheckJvmType Main |
| * (removes -client, -server, etc.) |
| * | |
| * | |
| * \|/ |
| * TranslateDashJArgs... |
| * (Prepare to pass args to vm) |
| * | |
| * | |
| * \|/ |
| * ParseArguments |
| * (removes -d32 and -d64 if any, |
| * processes version options, |
| * creates argument list for vm, |
| * etc.) |
| * |
| */ |
| |
| static const char * SetExecname(char **argv); |
| static jboolean GetJVMPath(const char *jrepath, const char *jvmtype, |
| char *jvmpath, jint jvmpathsize, const char * arch); |
| static jboolean GetJREPath(char *path, jint pathsize, const char * arch, jboolean speculative); |
| |
| |
| #define GetArch() GetArchPath(CURRENT_DATA_MODEL) |
| |
| const char * |
| GetArchPath(int nbits) |
| { |
| switch(nbits) { |
| #ifdef DUAL_MODE |
| case 32: |
| return LIBARCH32NAME; |
| case 64: |
| return LIBARCH64NAME; |
| #endif /* DUAL_MODE */ |
| default: |
| return LIBARCHNAME; |
| } |
| } |
| |
| 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. |
| */ |
| |
| int original_argc = *_argcp; |
| jboolean jvmpathExists; |
| |
| /* Compute/set the name of the executable */ |
| SetExecname(*_argvp); |
| |
| /* 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; |
| |
| int running = CURRENT_DATA_MODEL; |
| |
| int wanted = running; /* What data mode is being |
| asked for? Current model is |
| fine unless another model |
| is asked for */ |
| |
| char** newargv = NULL; |
| int newargc = 0; |
| |
| /* |
| * 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 (JLI_StrCmp(argv[i], "-J-d64") == 0 || JLI_StrCmp(argv[i], "-d64") == 0) { |
| wanted = 64; |
| continue; |
| } |
| if (JLI_StrCmp(argv[i], "-J-d32") == 0 || JLI_StrCmp(argv[i], "-d32") == 0) { |
| wanted = 32; |
| continue; |
| } |
| newargv[newargc++] = argv[i]; |
| |
| if (IsJavaArgs()) { |
| if (argv[i][0] != '-') continue; |
| } else { |
| if (JLI_StrCmp(argv[i], "-classpath") == 0 || JLI_StrCmp(argv[i], "-cp") == 0) { |
| i++; |
| if (i >= argc) break; |
| newargv[newargc++] = argv[i]; |
| continue; |
| } |
| if (argv[i][0] != '-') { i++; break; } |
| } |
| } |
| |
| /* 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) ) { |
| JLI_ReportErrorMessage(JRE_ERROR1); |
| exit(2); |
| } |
| |
| /* Find the specified JVM type */ |
| if (ReadKnownVMs(jrepath, arch, JNI_FALSE) < 1) { |
| JLI_ReportErrorMessage(CFG_ERROR7); |
| exit(1); |
| } |
| |
| jvmpath[0] = '\0'; |
| jvmtype = CheckJvmType(_argcp, _argvp, JNI_FALSE); |
| |
| if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, arch )) { |
| JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); |
| exit(4); |
| } |
| /* |
| * we seem to have everything we need, so without further ado |
| * we return back. |
| */ |
| return; |
| } 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, GetArchPath(wanted), JNI_TRUE)) { |
| goto EndDataModelSpeculate; |
| } |
| |
| /* |
| * Read in jvm.cfg for target data model and process vm |
| * selection options. |
| */ |
| if (ReadKnownVMs(jrepath, GetArchPath(wanted), 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, GetArchPath(wanted)); |
| |
| } |
| EndDataModelSpeculate: /* give up and let other code report error message */ |
| ; |
| #else |
| JLI_ReportErrorMessage(JRE_ERROR2, wanted); |
| exit(1); |
| #endif |
| } |
| |
| { |
| 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 = JLI_StrCpy(JLI_MemAlloc(JLI_StrLen(execname) + 1), execname); |
| char *olddir = oldexec; |
| char *oldbase = JLI_StrRChr(oldexec, '/'); |
| |
| |
| newexec = JLI_MemAlloc(JLI_StrLen(execname) + 20); |
| *oldbase++ = 0; |
| sprintf(newexec, "%s/%s/%s", olddir, |
| ((wanted==64) ? LIBARCH64NAME : ".."), oldbase); |
| argv[0] = newexec; |
| } |
| #endif |
| JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n"); |
| (void)fflush(stdout); |
| (void)fflush(stderr); |
| execv(newexec, argv); |
| JLI_ReportErrorMessageSys(JRE_ERROR4, newexec); |
| |
| #ifdef DUAL_MODE |
| if (running != wanted) { |
| JLI_ReportErrorMessage(JRE_ERROR5, wanted, running); |
| # ifdef __solaris__ |
| # ifdef __sparc |
| JLI_ReportErrorMessage(JRE_ERROR6); |
| # else |
| JLI_ReportErrorMessage(JRE_ERROR7); |
| # endif |
| } |
| # endif |
| #endif |
| |
| } |
| exit(1); |
| } |
| |
| } |
| |
| /* |
| * On Solaris VM choosing is done by the launcher (java.c). |
| */ |
| static jboolean |
| GetJVMPath(const char *jrepath, const char *jvmtype, |
| char *jvmpath, jint jvmpathsize, const char * arch) |
| { |
| struct stat s; |
| |
| if (JLI_StrChr(jvmtype, '/')) { |
| sprintf(jvmpath, "%s/" JVM_DLL, jvmtype); |
| } else { |
| sprintf(jvmpath, "%s/lib/%s/%s/" JVM_DLL, jrepath, arch, jvmtype); |
| } |
| |
| JLI_TraceLauncher("Does `%s' exist ... ", jvmpath); |
| |
| if (stat(jvmpath, &s) == 0) { |
| JLI_TraceLauncher("yes.\n"); |
| return JNI_TRUE; |
| } else { |
| JLI_TraceLauncher("no.\n"); |
| return JNI_FALSE; |
| } |
| } |
| |
| /* |
| * Find path to JRE based on .exe's location or registry settings. |
| */ |
| static jboolean |
| GetJREPath(char *path, jint pathsize, const char * arch, jboolean speculative) |
| { |
| char libjava[MAXPATHLEN]; |
| |
| if (GetApplicationHome(path, pathsize)) { |
| /* Is JRE co-located with the application? */ |
| sprintf(libjava, "%s/lib/%s/" JAVA_DLL, path, arch); |
| if (access(libjava, F_OK) == 0) { |
| goto found; |
| } |
| |
| /* Does the app ship a private JRE in <apphome>/jre directory? */ |
| sprintf(libjava, "%s/jre/lib/%s/" JAVA_DLL, path, arch); |
| if (access(libjava, F_OK) == 0) { |
| JLI_StrCat(path, "/jre"); |
| goto found; |
| } |
| } |
| |
| if (!speculative) |
| JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL); |
| return JNI_FALSE; |
| |
| found: |
| JLI_TraceLauncher("JRE path is %s\n", path); |
| return JNI_TRUE; |
| } |
| |
| jboolean |
| LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) |
| { |
| Dl_info dlinfo; |
| void *libjvm; |
| |
| JLI_TraceLauncher("JVM path is %s\n", jvmpath); |
| |
| libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL); |
| if (libjvm == NULL) { |
| #if defined(__solaris__) && 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 = JLI_StrStr(buf, "sparcv8plus "); |
| if(location == NULL) { |
| JLI_ReportErrorMessage(JVM_ERROR3); |
| return JNI_FALSE; |
| } |
| } |
| } |
| #endif |
| JLI_ReportErrorMessage(DLL_ERROR1, __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: |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| /* |
| * If app is "/foo/bin/javac", or "/foo/bin/sparcv9/javac" then put |
| * "/foo" into buf. |
| */ |
| jboolean |
| GetApplicationHome(char *buf, jint bufsize) |
| { |
| if (execname != NULL) { |
| JLI_StrNCpy(buf, execname, bufsize-1); |
| buf[bufsize-1] = '\0'; |
| } else { |
| return JNI_FALSE; |
| } |
| |
| if (JLI_StrRChr(buf, '/') == 0) { |
| buf[0] = '\0'; |
| return JNI_FALSE; |
| } |
| *(JLI_StrRChr(buf, '/')) = '\0'; /* executable file */ |
| if (JLI_StrLen(buf) < 4 || JLI_StrRChr(buf, '/') == 0) { |
| buf[0] = '\0'; |
| return JNI_FALSE; |
| } |
| if (JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0) |
| *(JLI_StrRChr(buf, '/')) = '\0'; /* sparcv9 or amd64 */ |
| if (JLI_StrLen(buf) < 4 || JLI_StrCmp("/bin", buf + JLI_StrLen(buf) - 4) != 0) { |
| buf[0] = '\0'; |
| return JNI_FALSE; |
| } |
| *(JLI_StrRChr(buf, '/')) = '\0'; /* bin */ |
| |
| 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 ((JLI_StrLen(indir) + JLI_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)) |
| JLI_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=='\\' && JLI_StrRChr(program, ':'))) |
| return Resolve("", program+1); |
| |
| /* relative path? */ |
| if (JLI_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(JLI_StrLen(path) + 2); |
| JLI_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; |
| } |
| |
| |
| |
| /* |
| * 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 const char* |
| SetExecname(char **argv) |
| { |
| char* exec_path = NULL; |
| #if defined(__solaris__) |
| { |
| Dl_info dlinfo; |
| int (*fptr)(); |
| |
| fptr = (int (*)())dlsym(RTLD_DEFAULT, "main"); |
| if (fptr == NULL) { |
| JLI_ReportErrorMessage(DLL_ERROR3, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| if (dladdr((void*)fptr, &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 /* !__solaris__ && !__linux */ |
| { |
| /* Not implemented */ |
| } |
| #endif |
| |
| if (exec_path == NULL) { |
| exec_path = FindExecName(argv[0]); |
| } |
| execname = exec_path; |
| return exec_path; |
| } |
| |
| void JLI_ReportErrorMessage(const char* fmt, ...) { |
| va_list vl; |
| va_start(vl, fmt); |
| vfprintf(stderr, fmt, vl); |
| fprintf(stderr, "\n"); |
| va_end(vl); |
| } |
| |
| void JLI_ReportErrorMessageSys(const char* fmt, ...) { |
| va_list vl; |
| char *emsg; |
| |
| /* |
| * TODO: its safer to use strerror_r but is not available on |
| * Solaris 8. Until then.... |
| */ |
| emsg = strerror(errno); |
| if (emsg != NULL) { |
| fprintf(stderr, "%s\n", emsg); |
| } |
| |
| va_start(vl, fmt); |
| vfprintf(stderr, fmt, vl); |
| fprintf(stderr, "\n"); |
| va_end(vl); |
| } |
| |
| void JLI_ReportExceptionDescription(JNIEnv * env) { |
| (*env)->ExceptionDescribe(env); |
| } |
| |
| /* |
| * 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 (JLI_StrLen(path) + JLI_StrLen(dir) + 11 > PATH_MAX) |
| return (0); /* Silently reject "impossibly" long paths */ |
| |
| sprintf(buffer, "%s/%s/bin/java", path, dir); |
| 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 ((JLI_StrNCmp(dp->d_name, "jre", 3) == 0) || |
| (JLI_StrNCmp(dp->d_name, "jdk", 3) == 0)) |
| offset = 3; |
| else if (JLI_StrNCmp(dp->d_name, "j2re", 4) == 0) |
| offset = 4; |
| else if (JLI_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(JLI_StrLen(dirname) + JLI_StrLen(best) + 2); |
| sprintf(ret_str, "%s/%s", 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(JLI_StrLen(home) + \ |
| JLI_StrLen(system_dir) + JLI_StrLen(user_dir) + 2); |
| sprintf(path, "%s%s:%s", 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 = JLI_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]; |
| const char* progname = GetProgramName(); |
| |
| /* |
| * Resolve the real path to the directory containing the selected JRE. |
| */ |
| if (realpath(jre, wanted) == NULL) { |
| JLI_ReportErrorMessage(JRE_ERROR9, jre); |
| exit(1); |
| } |
| |
| /* |
| * Resolve the real path to the currently running launcher. |
| */ |
| SetExecname(argv); |
| if (execname == NULL) { |
| JLI_ReportErrorMessage(JRE_ERROR10); |
| 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 (JLI_StrNCmp(wanted, execname, JLI_StrLen(wanted)) == 0) |
| return; /* I am the droid you were looking for */ |
| |
| |
| /* |
| * 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 (JLI_StrLen(wanted) + JLI_StrLen(progname) + 6 > PATH_MAX) { |
| JLI_ReportErrorMessage(JRE_ERROR11); |
| exit(1); |
| } |
| |
| /* |
| * Construct the path and exec it. |
| */ |
| (void)JLI_StrCat(JLI_StrCat(wanted, "/bin/"), progname); |
| argv[0] = JLI_StringDup(progname); |
| if (JLI_IsTraceLauncher()) { |
| 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"); |
| } |
| JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n"); |
| (void)fflush(stdout); |
| (void)fflush(stderr); |
| execv(wanted, argv); |
| JLI_ReportErrorMessageSys(JRE_ERROR12, wanted); |
| exit(1); |
| } |
| |
| /* |
| * "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' || |
| JLI_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 |
| ContinueInNewThread0(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(JLI_StrLen(substr) + MAX_PID_STR_SZ + 1); |
| sprintf(pid_prop_str, "%s%d", substr, getpid()); |
| AddOption(pid_prop_str, NULL); |
| #endif |
| } |
| |
| jboolean |
| IsJavaw() |
| { |
| /* noop on UNIX */ |
| return JNI_FALSE; |
| } |
| |
| void |
| InitLauncher(jboolean javaw) |
| { |
| JLI_SetTraceLauncher(); |
| } |
| |
| /* |
| * The implementation for finding classes from the bootstrap |
| * class loader, refer to java.h |
| */ |
| static FindClassFromBootLoader_t *findBootClass = NULL; |
| |
| jclass |
| FindBootStrapClass(JNIEnv *env, const char* classname) |
| { |
| if (findBootClass == NULL) { |
| findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT, |
| "JVM_FindClassFromBootLoader"); |
| if (findBootClass == NULL) { |
| JLI_ReportErrorMessage(DLL_ERROR4, |
| "JVM_FindClassFromBootLoader"); |
| return NULL; |
| } |
| } |
| return findBootClass(env, classname); |
| } |
