| /* |
| * Copyright (c) 1998, 2020, 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 "jvm_md.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" |
| |
| |
| #define JVM_DLL "libjvm.so" |
| #define JAVA_DLL "libjava.so" |
| #ifdef AIX |
| #define LD_LIBRARY_PATH "LIBPATH" |
| #else |
| #define LD_LIBRARY_PATH "LD_LIBRARY_PATH" |
| #endif |
| |
| /* help jettison the LD_LIBRARY_PATH settings in the future */ |
| #ifndef SETENV_REQUIRED |
| #define SETENV_REQUIRED |
| #endif |
| |
| #ifdef __solaris__ |
| # include <sys/systeminfo.h> |
| # include <sys/elf.h> |
| # include <stdio.h> |
| #endif |
| |
| /* |
| * 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). |
| * 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. |
| * |
| * Now, in most cases,the launcher will dlopen the target libjvm.so. All |
| * required libraries are loaded by the runtime linker, using the |
| * $RPATH/$ORIGIN baked into the shared libraries at compile time. Therefore, |
| * in most cases, the launcher will only exec, if the data models are |
| * mismatched, and will not set any environment variables, regardless of the |
| * data models. |
| * |
| * However, if the environment contains a LD_LIBRARY_PATH, this will cause the |
| * launcher to inspect the LD_LIBRARY_PATH. The launcher will check |
| * a. if the LD_LIBRARY_PATH's first component is the path to the desired |
| * libjvm.so |
| * b. if any other libjvm.so is found in any of the paths. |
| * If case b is true, then the launcher will set the LD_LIBRARY_PATH to the |
| * desired JRE and reexec, in order to propagate the environment. |
| * |
| * Main |
| * (incoming argv) |
| * | |
| * \|/ |
| * CreateExecutionEnvironment |
| * (determines desired data model) |
| * | |
| * | |
| * \|/ |
| * Have Desired Model ? --> NO --> Exit(with error) |
| * | |
| * | |
| * \|/ |
| * YES |
| * | |
| * | |
| * \|/ |
| * CheckJvmType |
| * (removes -client, -server, etc.) |
| * | |
| * | |
| * \|/ |
| * TranslateDashJArgs... |
| * (Prepare to pass args to vm) |
| * | |
| * | |
| * \|/ |
| * ParseArguments |
| * | |
| * | |
| * \|/ |
| * RequiresSetenv |
| * Is LD_LIBRARY_PATH |
| * and friends set ? --> NO --> Continue |
| * YES |
| * | |
| * | |
| * \|/ |
| * Path is desired JRE ? YES --> Continue |
| * NO |
| * | |
| * | |
| * \|/ |
| * Paths have well known |
| * jvm paths ? --> NO --> Error/Exit |
| * YES |
| * | |
| * | |
| * \|/ |
| * Does libjvm.so exist |
| * in any of them ? --> NO --> Continue |
| * YES |
| * | |
| * | |
| * \|/ |
| * Set the LD_LIBRARY_PATH |
| * | |
| * | |
| * \|/ |
| * Re-exec |
| * | |
| * | |
| * \|/ |
| * Main |
| */ |
| |
| /* Store the name of the executable once computed */ |
| static char *execname = NULL; |
| |
| /* |
| * execname accessor from other parts of platform dependent logic |
| */ |
| const char * |
| GetExecName() { |
| return execname; |
| } |
| |
| #ifdef SETENV_REQUIRED |
| static jboolean |
| JvmExists(const char *path) { |
| char tmp[PATH_MAX + 1]; |
| struct stat statbuf; |
| JLI_Snprintf(tmp, PATH_MAX, "%s/%s", path, JVM_DLL); |
| if (stat(tmp, &statbuf) == 0) { |
| return JNI_TRUE; |
| } |
| return JNI_FALSE; |
| } |
| /* |
| * contains a lib/{server,client}/libjvm.so ? |
| */ |
| static jboolean |
| ContainsLibJVM(const char *env) { |
| /* the usual suspects */ |
| char clientPattern[] = "lib/client"; |
| char serverPattern[] = "lib/server"; |
| char *envpath; |
| char *path; |
| char* save_ptr = NULL; |
| jboolean clientPatternFound; |
| jboolean serverPatternFound; |
| |
| /* fastest path */ |
| if (env == NULL) { |
| return JNI_FALSE; |
| } |
| |
| /* to optimize for time, test if any of our usual suspects are present. */ |
| clientPatternFound = JLI_StrStr(env, clientPattern) != NULL; |
| serverPatternFound = JLI_StrStr(env, serverPattern) != NULL; |
| if (clientPatternFound == JNI_FALSE && serverPatternFound == JNI_FALSE) { |
| return JNI_FALSE; |
| } |
| |
| /* |
| * we have a suspicious path component, check if it contains a libjvm.so |
| */ |
| envpath = JLI_StringDup(env); |
| for (path = strtok_r(envpath, ":", &save_ptr); path != NULL; path = strtok_r(NULL, ":", &save_ptr)) { |
| if (clientPatternFound && JLI_StrStr(path, clientPattern) != NULL) { |
| if (JvmExists(path)) { |
| JLI_MemFree(envpath); |
| return JNI_TRUE; |
| } |
| } |
| if (serverPatternFound && JLI_StrStr(path, serverPattern) != NULL) { |
| if (JvmExists(path)) { |
| JLI_MemFree(envpath); |
| return JNI_TRUE; |
| } |
| } |
| } |
| JLI_MemFree(envpath); |
| return JNI_FALSE; |
| } |
| |
| /* |
| * Test whether the environment variable needs to be set, see flowchart. |
| */ |
| static jboolean |
| RequiresSetenv(const char *jvmpath) { |
| char jpath[PATH_MAX + 1]; |
| char *llp; |
| char *dmllp = NULL; |
| char *p; /* a utility pointer */ |
| |
| #ifdef AIX |
| /* We always have to set the LIBPATH on AIX because ld doesn't support $ORIGIN. */ |
| return JNI_TRUE; |
| #endif |
| |
| llp = getenv("LD_LIBRARY_PATH"); |
| #ifdef __solaris__ |
| dmllp = getenv("LD_LIBRARY_PATH_64"); |
| #endif /* __solaris__ */ |
| /* no environment variable is a good environment variable */ |
| if (llp == NULL && dmllp == NULL) { |
| return JNI_FALSE; |
| } |
| #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, here and further downstream. Therefore, if we are running sgid or |
| * suid, this function's setting of LD_LIBRARY_PATH will be ineffective and |
| * we should case a return from the calling function. Getting the right |
| * libraries will be handled by the RPATH. In reality, this check is |
| * redundant, as the previous check for a non-null LD_LIBRARY_PATH will |
| * return back to the calling function forthwith, it is left here to safe |
| * guard against any changes, in the glibc's existing security policy. |
| */ |
| if ((getgid() != getegid()) || (getuid() != geteuid())) { |
| return JNI_FALSE; |
| } |
| #endif /* __linux */ |
| |
| /* |
| * Prevent recursions. Since LD_LIBRARY_PATH is the one which will be set by |
| * previous versions of the JRE, thus it is the only path that matters here. |
| * So we check to see if the desired JRE is set. |
| */ |
| JLI_StrNCpy(jpath, jvmpath, PATH_MAX); |
| p = JLI_StrRChr(jpath, '/'); |
| *p = '\0'; |
| if (llp != NULL && JLI_StrNCmp(llp, jpath, JLI_StrLen(jpath)) == 0) { |
| return JNI_FALSE; |
| } |
| |
| /* scrutinize all the paths further */ |
| if (llp != NULL && ContainsLibJVM(llp)) { |
| return JNI_TRUE; |
| } |
| if (dmllp != NULL && ContainsLibJVM(dmllp)) { |
| return JNI_TRUE; |
| } |
| return JNI_FALSE; |
| } |
| #endif /* SETENV_REQUIRED */ |
| |
| void |
| CreateExecutionEnvironment(int *pargc, char ***pargv, |
| char jrepath[], jint so_jrepath, |
| char jvmpath[], jint so_jvmpath, |
| char jvmcfg[], jint so_jvmcfg) { |
| |
| char * jvmtype = NULL; |
| int argc = *pargc; |
| char **argv = *pargv; |
| |
| #ifdef SETENV_REQUIRED |
| jboolean mustsetenv = JNI_FALSE; |
| char *runpath = NULL; /* existing effective LD_LIBRARY_PATH setting */ |
| 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 */ |
| size_t new_runpath_size; |
| #endif /* SETENV_REQUIRED */ |
| |
| /* Compute/set the name of the executable */ |
| SetExecname(*pargv); |
| |
| /* Check to see if the jvmpath exists */ |
| /* Find out where the JRE is that we will be using. */ |
| if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE)) { |
| JLI_ReportErrorMessage(JRE_ERROR1); |
| exit(2); |
| } |
| JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%sjvm.cfg", |
| jrepath, FILESEP, FILESEP); |
| /* Find the specified JVM type */ |
| if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) { |
| JLI_ReportErrorMessage(CFG_ERROR7); |
| exit(1); |
| } |
| |
| jvmpath[0] = '\0'; |
| jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE); |
| if (JLI_StrCmp(jvmtype, "ERROR") == 0) { |
| JLI_ReportErrorMessage(CFG_ERROR9); |
| exit(4); |
| } |
| |
| if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) { |
| JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath); |
| exit(4); |
| } |
| /* |
| * we seem to have everything we need, so without further ado |
| * we return back, otherwise proceed to set the environment. |
| */ |
| #ifdef SETENV_REQUIRED |
| mustsetenv = RequiresSetenv(jvmpath); |
| JLI_TraceLauncher("mustsetenv: %s\n", mustsetenv ? "TRUE" : "FALSE"); |
| |
| if (mustsetenv == JNI_FALSE) { |
| return; |
| } |
| #else |
| return; |
| #endif /* SETENV_REQUIRED */ |
| |
| #ifdef SETENV_REQUIRED |
| if (mustsetenv) { |
| /* |
| * We will set the LD_LIBRARY_PATH as follows: |
| * |
| * o $JVMPATH (directory portion only) |
| * o $JRE/lib |
| * o $JRE/../lib |
| * |
| * followed by the user's previous effective LD_LIBRARY_PATH, if |
| * any. |
| */ |
| |
| runpath = getenv(LD_LIBRARY_PATH); |
| |
| /* runpath contains current effective LD_LIBRARY_PATH setting */ |
| { /* New scope to declare local variable */ |
| char *new_jvmpath = JLI_StringDup(jvmpath); |
| new_runpath_size = ((runpath != NULL) ? JLI_StrLen(runpath) : 0) + |
| 2 * JLI_StrLen(jrepath) + |
| #ifdef AIX |
| /* On AIX we additionally need 'jli' in the path because ld doesn't support $ORIGIN. */ |
| JLI_StrLen(jrepath) + JLI_StrLen("/lib//jli:") + |
| #endif |
| JLI_StrLen(new_jvmpath) + 52; |
| new_runpath = JLI_MemAlloc(new_runpath_size); |
| newpath = new_runpath + JLI_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 = JLI_StrRChr(new_jvmpath, '/'); |
| if (lastslash) |
| *lastslash = '\0'; |
| |
| sprintf(new_runpath, LD_LIBRARY_PATH "=" |
| "%s:" |
| "%s/lib:" |
| #ifdef AIX |
| "%s/lib/jli:" /* Needed on AIX because ld doesn't support $ORIGIN. */ |
| #endif |
| "%s/../lib", |
| new_jvmpath, |
| jrepath, |
| #ifdef AIX |
| jrepath, |
| #endif |
| jrepath |
| ); |
| |
| JLI_MemFree(new_jvmpath); |
| |
| /* |
| * Check to make sure that the prefix of the current path is the |
| * desired environment variable setting, though the RequiresSetenv |
| * checks if the desired runpath exists, this logic does a more |
| * comprehensive check. |
| */ |
| if (runpath != NULL && |
| JLI_StrNCmp(newpath, runpath, JLI_StrLen(newpath)) == 0 && |
| (runpath[JLI_StrLen(newpath)] == 0 || |
| runpath[JLI_StrLen(newpath)] == ':')) { |
| JLI_MemFree(new_runpath); |
| 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) { |
| /* ensure storage for runpath + colon + NULL */ |
| if ((JLI_StrLen(runpath) + 1 + 1) > new_runpath_size) { |
| JLI_ReportErrorMessageSys(JRE_ERROR11); |
| exit(1); |
| } |
| JLI_StrCat(new_runpath, ":"); |
| JLI_StrCat(new_runpath, runpath); |
| } |
| |
| if (putenv(new_runpath) != 0) { |
| /* problem allocating memory; LD_LIBRARY_PATH not set properly */ |
| exit(1); |
| } |
| |
| /* |
| * 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. |
| */ |
| |
| newenvp = environ; |
| } |
| #endif /* SETENV_REQUIRED */ |
| { |
| char *newexec = execname; |
| JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n"); |
| (void) fflush(stdout); |
| (void) fflush(stderr); |
| #ifdef SETENV_REQUIRED |
| if (mustsetenv) { |
| execve(newexec, argv, newenvp); |
| } else { |
| execv(newexec, argv); |
| } |
| #else /* !SETENV_REQUIRED */ |
| execv(newexec, argv); |
| #endif /* SETENV_REQUIRED */ |
| JLI_ReportErrorMessageSys(JRE_ERROR4, newexec); |
| } |
| exit(1); |
| } |
| |
| |
| static jboolean |
| GetJVMPath(const char *jrepath, const char *jvmtype, |
| char *jvmpath, jint jvmpathsize) |
| { |
| struct stat s; |
| |
| if (JLI_StrChr(jvmtype, '/')) { |
| JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype); |
| } else { |
| JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, 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, jboolean speculative) |
| { |
| char libjava[MAXPATHLEN]; |
| struct stat s; |
| |
| if (GetApplicationHome(path, pathsize)) { |
| /* Is JRE co-located with the application? */ |
| JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); |
| if (access(libjava, F_OK) == 0) { |
| JLI_TraceLauncher("JRE path is %s\n", path); |
| return JNI_TRUE; |
| } |
| /* ensure storage for path + /jre + NULL */ |
| if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) { |
| JLI_TraceLauncher("Insufficient space to store JRE path\n"); |
| return JNI_FALSE; |
| } |
| /* Does the app ship a private JRE in <apphome>/jre directory? */ |
| JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path); |
| if (access(libjava, F_OK) == 0) { |
| JLI_StrCat(path, "/jre"); |
| JLI_TraceLauncher("JRE path is %s\n", path); |
| return JNI_TRUE; |
| } |
| } |
| |
| if (GetApplicationHomeFromDll(path, pathsize)) { |
| JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path); |
| if (stat(libjava, &s) == 0) { |
| JLI_TraceLauncher("JRE path is %s\n", path); |
| return JNI_TRUE; |
| } |
| } |
| |
| if (!speculative) |
| JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL); |
| return JNI_FALSE; |
| } |
| |
| jboolean |
| LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn) |
| { |
| 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) { |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| /* read in elf header */ |
| count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp); |
| fclose(fp); |
| if (count < 1) { |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| /* |
| * 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__); |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| ifn->CreateJavaVM = (CreateJavaVM_t) |
| dlsym(libjvm, "JNI_CreateJavaVM"); |
| if (ifn->CreateJavaVM == NULL) { |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t) |
| dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs"); |
| if (ifn->GetDefaultJavaVMInitArgs == NULL) { |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t) |
| dlsym(libjvm, "JNI_GetCreatedJavaVMs"); |
| if (ifn->GetCreatedJavaVMs == NULL) { |
| JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror()); |
| return JNI_FALSE; |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| /* |
| * 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. |
| */ |
| 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(2) 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; |
| } |
| |
| /* --- Splash Screen shared library support --- */ |
| static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen"); |
| static void* hSplashLib = NULL; |
| |
| void* SplashProcAddress(const char* name) { |
| if (!hSplashLib) { |
| int ret; |
| char jrePath[MAXPATHLEN]; |
| char splashPath[MAXPATHLEN]; |
| |
| if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) { |
| JLI_ReportErrorMessage(JRE_ERROR1); |
| return NULL; |
| } |
| ret = JLI_Snprintf(splashPath, sizeof(splashPath), "%s/lib/%s", |
| jrePath, SPLASHSCREEN_SO); |
| |
| if (ret >= (int) sizeof(splashPath)) { |
| JLI_ReportErrorMessage(JRE_ERROR11); |
| return NULL; |
| } |
| if (ret < 0) { |
| JLI_ReportErrorMessage(JRE_ERROR13); |
| return NULL; |
| } |
| hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL); |
| JLI_TraceLauncher("Info: loaded %s\n", splashPath); |
| } |
| if (hSplashLib) { |
| void* sym = dlsym(hSplashLib, name); |
| return sym; |
| } else { |
| return NULL; |
| } |
| } |
| |
| void SplashFreeLibrary() { |
| if (hSplashLib) { |
| dlclose(hSplashLib); |
| hSplashLib = NULL; |
| } |
| } |
| |
| /* |
| * Signature adapter for pthread_create() or thr_create(). |
| */ |
| static void* ThreadJavaMain(void* args) { |
| return (void*)(intptr_t)JavaMain(args); |
| } |
| |
| /* |
| * Block current thread and continue execution in a new thread. |
| */ |
| int |
| CallJavaMainInNewThread(jlong stack_size, void* args) { |
| int rslt; |
| #ifndef __solaris__ |
| 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); |
| } |
| pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads |
| |
| if (pthread_create(&tid, &attr, ThreadJavaMain, args) == 0) { |
| void* tmp; |
| pthread_join(tid, &tmp); |
| rslt = (int)(intptr_t)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 JavaMain as JNI_CreateJavaVM needs to create quite a |
| * few new threads, anyway, just give it a try.. |
| */ |
| rslt = JavaMain(args); |
| } |
| |
| pthread_attr_destroy(&attr); |
| #else /* __solaris__ */ |
| thread_t tid; |
| long flags = 0; |
| if (thr_create(NULL, stack_size, ThreadJavaMain, args, flags, &tid) == 0) { |
| void* tmp; |
| thr_join(tid, NULL, &tmp); |
| rslt = (int)(intptr_t)tmp; |
| } else { |
| /* See above. Continue in current thread if thr_create() failed */ |
| rslt = JavaMain(args); |
| } |
| #endif /* !__solaris__ */ |
| 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 /* __linux__ */ |
| } |
| |
| int |
| JVMInit(InvocationFunctions* ifn, jlong threadStackSize, |
| int argc, char **argv, |
| int mode, char *what, int ret) |
| { |
| ShowSplashScreen(); |
| return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret); |
| } |
| |
| void |
| PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) |
| { |
| // stubbed out for windows and *nixes. |
| } |
| |
| void |
| RegisterThread() |
| { |
| // stubbed out for windows and *nixes. |
| } |
| |
| /* |
| * on unix, we return a false to indicate this option is not applicable |
| */ |
| jboolean |
| ProcessPlatformOption(const char *arg) |
| { |
| return JNI_FALSE; |
| } |
| |
| #ifndef __solaris__ |
| |
| /* |
| * Provide a CounterGet() implementation based on gettimeofday() which |
| * is universally available, even though it may not be 'high resolution' |
| * compared to platforms that provide gethrtime() (like Solaris). It is |
| * also subject to time-of-day changes, but alternatives may not be |
| * known to be available at either build time or run time. |
| */ |
| uint64_t CounterGet() { |
| uint64_t result = 0; |
| struct timeval tv; |
| if (gettimeofday(&tv, NULL) != -1) { |
| result = 1000000LL * (uint64_t)tv.tv_sec; |
| result += (uint64_t)tv.tv_usec; |
| } |
| return result; |
| } |
| |
| #endif // !__solaris__ |
