void* SplashProcAddress(const char* name) {
if (!hSplashLib) {
int ret;
char jrePath[MAXPATHLEN];
char splashPath[MAXPATHLEN];
if (!GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE)) {
JLI_ReportErrorMessage(JRE_ERROR1);
return NULL;
}
ret = JLI_Snprintf(splashPath, sizeof(splashPath), "%s/lib/%s/%s",
jrePath, GetArch(), 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;
}
}
/*
* Load a jvm from "jvmpath" and initialize the invocation functions.
*/
jboolean
LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
{
HINSTANCE handle;
JLI_TraceLauncher("JVM path is %s\n", jvmpath);
/*
* The Microsoft C Runtime Library needs to be loaded first. A copy is
* assumed to be present in the "JRE path" directory. If it is not found
* there (or "JRE path" fails to resolve), skip the explicit load and let
* nature take its course, which is likely to be a failure to execute.
*
*/
LoadMSVCRT();
/* Load the Java VM DLL */
if ((handle = LoadLibrary(jvmpath)) == 0) {
JLI_ReportErrorMessage(DLL_ERROR4, (char *)jvmpath);
return JNI_FALSE;
}
/* Now get the function addresses */
ifn->CreateJavaVM =
(void *)GetProcAddress(handle, "JNI_CreateJavaVM");
ifn->GetDefaultJavaVMInitArgs =
(void *)GetProcAddress(handle, "JNI_GetDefaultJavaVMInitArgs");
if (ifn->CreateJavaVM == 0 || ifn->GetDefaultJavaVMInitArgs == 0) {
JLI_ReportErrorMessage(JNI_ERROR1, (char *)jvmpath);
return JNI_FALSE;
}
return JNI_TRUE;
}
static jboolean
LoadMSVCRT()
{
// Only do this once
static int loaded = 0;
char crtpath[MAXPATHLEN];
if (!loaded) {
/*
* The Microsoft C Runtime Library needs to be loaded first. A copy is
* assumed to be present in the "JRE path" directory. If it is not found
* there (or "JRE path" fails to resolve), skip the explicit load and let
* nature take its course, which is likely to be a failure to execute.
* The makefiles will provide the correct lib contained in quotes in the
* macro MSVCR_DLL_NAME.
*/
#ifdef MSVCR_DLL_NAME
if (GetJREPath(crtpath, MAXPATHLEN)) {
if (JLI_StrLen(crtpath) + JLI_StrLen("\\bin\\") +
JLI_StrLen(MSVCR_DLL_NAME) >= MAXPATHLEN) {
JLI_ReportErrorMessage(JRE_ERROR11);
return JNI_FALSE;
}
(void)JLI_StrCat(crtpath, "\\bin\\" MSVCR_DLL_NAME); /* Add crt dll */
JLI_TraceLauncher("CRT path is %s\n", crtpath);
if (_access(crtpath, 0) == 0) {
if (LoadLibrary(crtpath) == 0) {
JLI_ReportErrorMessage(DLL_ERROR4, crtpath);
return JNI_FALSE;
}
}
}
#endif /* MSVCR_DLL_NAME */
#ifdef MSVCP_DLL_NAME
if (GetJREPath(crtpath, MAXPATHLEN)) {
if (JLI_StrLen(crtpath) + JLI_StrLen("\\bin\\") +
JLI_StrLen(MSVCP_DLL_NAME) >= MAXPATHLEN) {
JLI_ReportErrorMessage(JRE_ERROR11);
return JNI_FALSE;
}
(void)JLI_StrCat(crtpath, "\\bin\\" MSVCP_DLL_NAME); /* Add prt dll */
JLI_TraceLauncher("PRT path is %s\n", crtpath);
if (_access(crtpath, 0) == 0) {
if (LoadLibrary(crtpath) == 0) {
JLI_ReportErrorMessage(DLL_ERROR4, crtpath);
return JNI_FALSE;
}
}
}
#endif /* MSVCP_DLL_NAME */
loaded = 1;
}
return JNI_TRUE;
}
/*
* Find path to JRE based on .exe's location or registry settings.
*/
jboolean
GetJREPath(char *path, jint pathsize)
{
char javadll[MAXPATHLEN];
struct stat s;
if (GetApplicationHome(path, pathsize)) {
/* Is JRE co-located with the application? */
JLI_Snprintf(javadll, sizeof(javadll), "%s\\bin\\" JAVA_DLL, path);
if (stat(javadll, &s) == 0) {
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
/* Does this app ship a private JRE in <apphome>\jre directory? */
JLI_Snprintf(javadll, sizeof (javadll), "%s\\jre\\bin\\" JAVA_DLL, path);
if (stat(javadll, &s) == 0) {
JLI_StrCat(path, "\\jre");
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
}
/* Look for a public JRE on this machine. */
if (GetPublicJREHome(path, pathsize)) {
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
return JNI_FALSE;
}
/*
* 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;
{
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);
}
}
}
}
if (exec_path == NULL) {
exec_path = FindExecName(argv[0]);
}
execname = exec_path;
return exec_path;
}
/*
* 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? */
JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/%s/" JAVA_DLL, path, arch);
if (access(libjava, F_OK) == 0) {
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
/* Does the app ship a private JRE in <apphome>/jre directory? */
JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/%s/" JAVA_DLL, path, arch);
if (access(libjava, F_OK) == 0) {
JLI_StrCat(path, "/jre");
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
}
if (!speculative)
JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
return JNI_FALSE;
}
static jboolean
LoadMSVCRT()
{
// Only do this once
static int loaded = 0;
char crtpath[MAXPATHLEN];
if (!loaded) {
/*
* The Microsoft C Runtime Library needs to be loaded first. A copy is
* assumed to be present in the "JRE path" directory. If it is not found
* there (or "JRE path" fails to resolve), skip the explicit load and let
* nature take its course, which is likely to be a failure to execute.
* This is clearly completely specific to the exact compiler version
* which isn't very nice, but its hardly the only place.
* No attempt to look for compiler versions in between 2003 and 2010
* as we aren't supporting building with those.
*/
#ifdef _MSC_VER
#if _MSC_VER < 1400
#define CRT_DLL "msvcr71.dll"
#endif
#if _MSC_VER >= 1600
#define CRT_DLL "msvcr100.dll"
#endif
#ifdef CRT_DLL
if (GetJREPath(crtpath, MAXPATHLEN)) {
if (JLI_StrLen(crtpath) + JLI_StrLen("\\bin\\") +
JLI_StrLen(CRT_DLL) >= MAXPATHLEN) {
JLI_ReportErrorMessage(JRE_ERROR11);
return JNI_FALSE;
}
(void)JLI_StrCat(crtpath, "\\bin\\" CRT_DLL); /* Add crt dll */
JLI_TraceLauncher("CRT path is %s\n", crtpath);
if (_access(crtpath, 0) == 0) {
if (LoadLibrary(crtpath) == 0) {
JLI_ReportErrorMessage(DLL_ERROR4, crtpath);
return JNI_FALSE;
}
}
}
#endif /* CRT_DLL */
#endif /* _MSC_VER */
loaded = 1;
}
return JNI_TRUE;
}
/*
* 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? */
JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
if (access(libjava, F_OK) == 0) {
return JNI_TRUE;
}
/* ensure storage for path + /jre + NULL */
if ((JLI_StrLen(path) + 4 + 1) > 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;
}
}
/* try to find ourselves instead */
Dl_info selfInfo;
dladdr(&GetJREPath, &selfInfo);
char *realPathToSelf = realpath(selfInfo.dli_fname, path);
if (realPathToSelf != path) {
return JNI_FALSE;
}
size_t pathLen = strlen(realPathToSelf);
if (pathLen == 0) {
return JNI_FALSE;
}
const char lastPathComponent[] = "/lib/jli/libjli.dylib";
size_t sizeOfLastPathComponent = sizeof(lastPathComponent) - 1;
if (pathLen < sizeOfLastPathComponent) {
return JNI_FALSE;
}
size_t indexOfLastPathComponent = pathLen - sizeOfLastPathComponent;
if (0 == strncmp(realPathToSelf + indexOfLastPathComponent, lastPathComponent, sizeOfLastPathComponent - 1)) {
realPathToSelf[indexOfLastPathComponent + 1] = '\0';
return JNI_TRUE;
}
if (!speculative)
JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
return JNI_FALSE;
}
void* SplashProcAddress(const char* name) {
if (!hSplashLib) {
char jrePath[PATH_MAX];
if (!GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE)) {
JLI_ReportErrorMessage(JRE_ERROR1);
return NULL;
}
char splashPath[PATH_MAX];
const int 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);
// It's OK if dlopen() fails. The splash screen library binary file
// might have been stripped out from the JRE image to reduce its size
// (e.g. on embedded platforms).
if (hSplashLib) {
if (!SetJavaVMValue()) {
dlclose(hSplashLib);
hSplashLib = NULL;
}
}
}
if (hSplashLib) {
void* sym = dlsym(hSplashLib, name);
return sym;
} else {
return NULL;
}
}
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) {
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;
}
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);
}
static InvocationFunctions *GetExportedJNIFunctions() {
if (sExportedJNIFunctions != NULL) return sExportedJNIFunctions;
char jrePath[PATH_MAX];
jboolean gotJREPath = GetJREPath(jrePath, sizeof(jrePath), GetArch(), JNI_FALSE);
if (!gotJREPath) {
JLI_ReportErrorMessage("Failed to GetJREPath()");
return NULL;
}
char *preferredJVM = sPreferredJVMType;
if (preferredJVM == NULL) {
#if defined(__i386__)
preferredJVM = "client";
#elif defined(__x86_64__)
preferredJVM = "server";
#else
#error "Unknown architecture - needs definition"
#endif
}
char jvmPath[PATH_MAX];
jboolean gotJVMPath = GetJVMPath(jrePath, preferredJVM, jvmPath, sizeof(jvmPath), GetArch(), CURRENT_DATA_MODEL);
if (!gotJVMPath) {
JLI_ReportErrorMessage("Failed to GetJVMPath()");
return NULL;
}
InvocationFunctions *fxns = malloc(sizeof(InvocationFunctions));
jboolean vmLoaded = LoadJavaVM(jvmPath, fxns);
if (!vmLoaded) {
JLI_ReportErrorMessage("Failed to LoadJavaVM()");
return NULL;
}
return sExportedJNIFunctions = fxns;
}
jclass
FindBootStrapClass(JNIEnv *env, const char* classname)
{
if (findBootClass == NULL) {
printf("%s[%d] [tid: %lu]: 试图获取函数[JVM_FindClassFromBootLoader]的指针(地址)...\n", __FILE__, __LINE__, pthread_self());
findBootClass = (FindClassFromBootLoader_t *)dlsym(RTLD_DEFAULT, "JVM_FindClassFromBootLoader");
if (findBootClass == NULL) {
JLI_ReportErrorMessage(DLL_ERROR4,
"JVM_FindClassFromBootLoader");
return NULL;
}
}
return findBootClass(env, classname);
}
/*
* Find path to JRE based on .exe's location or registry settings.
*/
jboolean
GetJREPath(char *path, jint pathsize)
{
char javadll[MAXPATHLEN];
struct stat s;
if (GetApplicationHome(path, pathsize)) {
/* Is JRE co-located with the application? */
JLI_Snprintf(javadll, sizeof(javadll), "%s\\bin\\" JAVA_DLL, path);
if (stat(javadll, &s) == 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 this app ship a private JRE in <apphome>\jre directory? */
JLI_Snprintf(javadll, sizeof (javadll), "%s\\jre\\bin\\" JAVA_DLL, path);
if (stat(javadll, &s) == 0) {
JLI_StrCat(path, "\\jre");
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
}
/* Try getting path to JRE from path to JLI.DLL */
if (GetApplicationHomeFromDll(path, pathsize)) {
JLI_Snprintf(javadll, sizeof(javadll), "%s\\bin\\" JAVA_DLL, path);
if (stat(javadll, &s) == 0) {
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
}
#ifdef USE_REGISTRY_LOOKUP
/* Lookup public JRE using Windows registry. */
if (GetPublicJREHome(path, pathsize)) {
JLI_TraceLauncher("JRE path is %s\n", path);
return JNI_TRUE;
}
#endif
JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
return JNI_FALSE;
}
/*
* 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;
}
jclass FindBootStrapClass(JNIEnv *env, const char *classname)
{
HMODULE hJvm;
if (findBootClass == NULL) {
hJvm = GetModuleHandle(JVM_DLL);
if (hJvm == NULL) return NULL;
/* need to use the demangled entry point */
findBootClass = (FindClassFromBootLoader_t *)GetProcAddress(hJvm,
"JVM_FindClassFromBootLoader");
if (findBootClass == NULL) {
JLI_ReportErrorMessage(DLL_ERROR4, "JVM_FindClassFromBootLoader");
return NULL;
}
}
return findBootClass(env, classname);
}
/*
* 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];
struct stat s;
if (GetApplicationHome(path, pathsize)) {
/* Is JRE co-located with the application? */
JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/%s/" JAVA_DLL, path, arch);
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/%s/" JAVA_DLL, path, arch);
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/%s/" JAVA_DLL, path, arch);
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;
}
/*
* 使用指定的jvm版本来运行java程序
*
* ******************************************************************************
* 函数原型： char *realpath(const char *path, char *resolved_path);
* 函数说明： 用来将参数path所指的相对路径转换成绝对路径后存于参数resolved_path所指的字符串数组或指针中
* 函数返回： 成功则返回指向resolved_path的指针，失败返回NULL，错误代码存于errno
*
* ******************************************************************************
* 函数原型: int execve(const char * filename,char * const argv[],char * const envp[]);
* 函数说明： execve用来执行参数filename字符串所代表的文件路径,第二个参数是利用数组指针来传递给执行文件,并且需要以
* 空指针(NULL)结束,最后一个参数则为传递给执行文件的新环境变量数组.exec函数一共有六个,其中execve为内核
* 级系统调用,其他(execl,execle,execlp,execv,execvp)都是调用execve的库函数
* 函数返回： 如果执行成功则函数不会返回,执行失败则直接返回-1,失败原因存于errno中
*/
void ExecJRE(char *jre, char **argv)
{
char wanted[PATH_MAX];
const char* progname = GetProgramName();
const char* execname = NULL;
/*
* 转换成绝对路径
*/
if (realpath(jre, wanted) == NULL) {
JLI_ReportErrorMessage(JRE_ERROR9, jre);
exit(1);
}
/*
* 获取启动当前JVM进程的命令
*/
SetExecname(argv);
execname = GetExecName();
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");
//刷当前进程的标准输出/错误输出流
(void)fflush(stdout);
(void)fflush(stderr);
//执行新的可执行程序
execv(wanted, argv);
JLI_ReportErrorMessageSys(JRE_ERROR12, wanted);
exit(1);
}
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) {
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;
}
return JNI_TRUE;
}
void
CreateExecutionEnvironment(int *pargc, char ***pargv,
char jrepath[], jint so_jrepath,
char jvmpath[], jint so_jvmpath,
char jvmcfg[], jint so_jvmcfg) {
/*
* 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.
*/
jboolean jvmpathExists;
/* Compute/set the name of the executable */
SetExecname(*pargv);
/* Check data model flags, and exec process, if needed */
{
char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
char * jvmtype = NULL;
int argc = *pargc;
char **argv = *pargv;
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(char*));
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);
}
JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%s%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, arch, wanted)) {
JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath);
exit(4);
}
/*
* Mac OS X requires the Cocoa event loop to be run on the "main"
* thread. Spawn off a new thread to run main() and pass
* this thread off to the Cocoa event loop.
*/
MacOSXStartup(argc, argv);
/*
* we seem to have everything we need, so without further ado
* we return back, otherwise proceed to set the environment.
*/
return;
} else { /* do the same speculatively or exit */
#if defined(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)) {
/* give up and let other code report error message */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%s%sjvm.cfg",
jrepath, FILESEP, FILESEP, "", "");
/*
* Read in jvm.cfg for target data model and process vm
* selection options.
*/
if (ReadKnownVMs(jvmcfg, JNI_TRUE) < 1) {
/* give up and let other code report error message */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
jvmpath[0] = '\0';
jvmtype = CheckJvmType(pargc, pargv, JNI_TRUE);
if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
JLI_ReportErrorMessage(CFG_ERROR9);
exit(4);
}
/* exec child can do error checking on the existence of the path */
jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, GetArchPath(wanted), wanted);
}
#else /* ! DUAL_MODE */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
#endif /* DUAL_MODE */
}
{
char *newexec = execname;
JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n");
(void) fflush(stdout);
(void) fflush(stderr);
/*
* Use posix_spawn() instead of execv() on Mac OS X.
* This allows us to choose which architecture the child process
* should run as.
*/
{
posix_spawnattr_t attr;
size_t unused_size;
pid_t unused_pid;
#if defined(__i386__) || defined(__x86_64__)
cpu_type_t cpu_type[] = { (wanted == 64) ? CPU_TYPE_X86_64 : CPU_TYPE_X86,
(running== 64) ? CPU_TYPE_X86_64 : CPU_TYPE_X86 };
#else
cpu_type_t cpu_type[] = { CPU_TYPE_ANY };
#endif /* __i386 .. */
posix_spawnattr_init(&attr);
posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETEXEC);
posix_spawnattr_setbinpref_np(&attr, sizeof(cpu_type) / sizeof(cpu_type_t),
cpu_type, &unused_size);
posix_spawn(&unused_pid, newexec, NULL, &attr, argv, environ);
}
JLI_ReportErrorMessageSys(JRE_ERROR4, newexec);
#if defined(DUAL_MODE)
if (running != wanted) {
JLI_ReportErrorMessage(JRE_ERROR5, wanted, running);
}
#endif /* DUAL_MODE */
}
exit(1);
}
}
void
CreateExecutionEnvironment(int *pargc, char ***pargv,
char jrepath[], jint so_jrepath,
char jvmpath[], jint so_jvmpath) {
/*
* 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.
*/
jboolean jvmpathExists;
/* Compute/set the name of the executable */
SetExecname(*pargv);
/* Check data model flags, and exec process, if needed */
{
char *arch = (char *)GetArch(); /* like sparc or sparcv9 */
char * jvmtype = NULL;
int argc = *pargc;
char **argv = *pargv;
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 */
#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 */
#ifdef __solaris__
char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
Solaris only */
#endif /* __solaris__ */
#endif /* SETENV_REQUIRED */
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(char*));
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(pargc, pargv, JNI_FALSE);
if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
JLI_ReportErrorMessage(CFG_ERROR9);
exit(4);
}
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, otherwise proceed to set the environment.
*/
#ifdef SETENV_REQUIRED
mustsetenv = RequiresSetenv(wanted, jvmpath);
JLI_TraceLauncher("mustsetenv: %s\n", mustsetenv ? "TRUE" : "FALSE");
if (mustsetenv == JNI_FALSE) {
return;
}
#else
return;
#endif /* SETENV_REQUIRED */
} 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)) {
/* give up and let other code report error message */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
/*
* Read in jvm.cfg for target data model and process vm
* selection options.
*/
if (ReadKnownVMs(jrepath, GetArchPath(wanted), JNI_TRUE) < 1) {
/* give up and let other code report error message */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
jvmpath[0] = '\0';
jvmtype = CheckJvmType(pargc, pargv, JNI_TRUE);
if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
JLI_ReportErrorMessage(CFG_ERROR9);
exit(4);
}
/* exec child can do error checking on the existence of the path */
jvmpathExists = GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath, GetArchPath(wanted));
#ifdef SETENV_REQUIRED
mustsetenv = RequiresSetenv(wanted, jvmpath);
#endif /* SETENV_REQUIRED */
}
#else
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
#endif
}
#ifdef SETENV_REQUIRED
if (mustsetenv) {
/*
* 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 __solaris__
/*
* 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:
JLI_ReportErrorMessage(JRE_ERROR3, __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 /* __solaris__ */
/* runpath contains current effective LD_LIBRARY_PATH setting */
jvmpath = JLI_StringDup(jvmpath);
new_runpath = JLI_MemAlloc(((runpath != NULL) ? JLI_StrLen(runpath) : 0) +
2 * JLI_StrLen(jrepath) + 2 * JLI_StrLen(arch) +
JLI_StrLen(jvmpath) + 52);
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(jvmpath, '/');
if (lastslash)
*lastslash = '\0';
sprintf(new_runpath, "LD_LIBRARY_PATH="
"%s:"
"%s/lib/%s:"
"%s/../lib/%s",
jvmpath,
#ifdef DUAL_MODE
jrepath, GetArchPath(wanted),
jrepath, GetArchPath(wanted)
#else
jrepath, arch,
jrepath, arch
#endif
);
/*
* 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)] == ':') &&
(running == wanted) /* data model does not have to be changed */
#ifdef __solaris__
&& (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) {
JLI_StrCat(new_runpath, ":");
JLI_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 __solaris__
/*
* 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;
}
#endif /* SETENV_REQUIRED */
{
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 /* DUAL_MODE */
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
execv(newexec, argv);
#endif /* SETENV_REQUIRED */
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 /* __sparc */
}
#endif /* __solaris__ */
#endif /* DUAL_MODE */
}
exit(1);
}
}
void
CreateExecutionEnvironment(int *pargc, char ***pargv,
char jrepath[], jint so_jrepath,
char jvmpath[], jint so_jvmpath,
char jvmcfg[], jint so_jvmcfg) {
/*
* 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, otherwise we simply exit with an error, as we no longer
* support dual data models.
*/
jboolean jvmpathExists;
/* Compute/set the name of the executable */
SetExecname(*pargv);
/* Check data model flags, and exec process, if needed */
{
char *arch = LIBARCHNAME; /* like sparc or sparcv9 */
char * jvmtype = NULL;
int argc = *pargc;
char **argv = *pargv;
int running = CURRENT_DATA_MODEL;
/*
* As of jdk9, there is no support for dual mode operations, however
* for legacy error reporting purposes and until -d options are supported
* we need this.
*/
int wanted = running;
#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;
#ifdef __solaris__
char* dmpath = NULL; /* data model specific LD_LIBRARY_PATH,
Solaris only */
#endif /* __solaris__ */
#endif /* SETENV_REQUIRED */
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(char*));
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);
}
JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%s%s%sjvm.cfg",
jrepath, FILESEP, FILESEP, arch, 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, arch, 0 )) {
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) {
JLI_MemFree(newargv);
return;
}
#else
JLI_MemFree(newargv);
return;
#endif /* SETENV_REQUIRED */
} else { /* do the same speculatively or exit */
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
#ifdef SETENV_REQUIRED
if (mustsetenv) {
/*
* 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 __solaris__
/*
* 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.
* 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:
case 64:
dmpath = getenv("LD_LIBRARY_PATH_64");
wanted = 64;
break;
default:
JLI_ReportErrorMessage(JRE_ERROR3, __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 /* ! __solaris__ */
/*
* If not on Solaris, assume only a single LD_LIBRARY_PATH
* variable.
*/
runpath = getenv(LD_LIBRARY_PATH);
#endif /* __solaris__ */
/* runpath contains current effective LD_LIBRARY_PATH setting */
jvmpath = JLI_StringDup(jvmpath);
new_runpath_size = ((runpath != NULL) ? JLI_StrLen(runpath) : 0) +
2 * JLI_StrLen(jrepath) + 2 * JLI_StrLen(arch) +
#ifdef AIX
/* On AIX we additionally need 'jli' in the path because ld doesn't support $ORIGIN. */
JLI_StrLen(jrepath) + JLI_StrLen(arch) + JLI_StrLen("/lib//jli:") +
#endif
JLI_StrLen(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(jvmpath, '/');
if (lastslash)
*lastslash = '\0';
sprintf(new_runpath, LD_LIBRARY_PATH "="
"%s:"
"%s/lib/%s:"
#ifdef AIX
"%s/lib/%s/jli:" /* Needed on AIX because ld doesn't support $ORIGIN. */
#endif
"%s/../lib/%s",
jvmpath,
jrepath, arch,
#ifdef AIX
jrepath, arch,
#endif
jrepath, arch
);
/*
* 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)] == ':') &&
(running == wanted) /* data model does not have to be changed */
#ifdef __solaris__
&& (dmpath == NULL) /* data model specific variables not set */
#endif /* __solaris__ */
) {
JLI_MemFree(newargv);
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) {
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 __solaris__
/*
* If dmpath is not NULL, remove the data model specific string
* in the environment for the exec'ed child.
*/
if (dmpath != NULL)
(void)UnsetEnv("LD_LIBRARY_PATH_64");
#endif /* __solaris */
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);
}
}
/*
* 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 will yield
* the exact same Java environment, regardless of the version of the arbitrary
* launcher we start with.
*/
void
ExecJRE(char *jre, char **argv) {
int len;
char path[MAXPATHLEN + 1];
const char *progname = GetProgramName();
/*
* Resolve the real path to the currently running launcher.
*/
len = GetModuleFileName(NULL, path, MAXPATHLEN + 1);
if (len == 0 || len > MAXPATHLEN) {
JLI_ReportErrorMessageSys(JRE_ERROR9, progname);
exit(1);
}
JLI_TraceLauncher("ExecJRE: old: %s\n", path);
JLI_TraceLauncher("ExecJRE: new: %s\n", jre);
/*
* 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_StrNCaseCmp(jre, path, JLI_StrLen(jre)) == 0)
return; /* I am the droid you were looking for */
/*
* If this isn't the selected version, exec the selected version.
*/
JLI_Snprintf(path, sizeof(path), "%s\\bin\\%s.exe", jre, progname);
/*
* Although Windows has an execv() entrypoint, it doesn't actually
* overlay a process: it can only create a new process and terminate
* the old process. Therefore, any processes waiting on the initial
* process wake up and they shouldn't. Hence, a chain of pseudo-zombie
* processes must be retained to maintain the proper wait semantics.
* Fortunately the image size of the launcher isn't too large at this
* time.
*
* If it weren't for this semantic flaw, the code below would be ...
*
* execv(path, argv);
* JLI_ReportErrorMessage("Error: Exec of %s failed\n", path);
* exit(1);
*
* The incorrect exec semantics could be addressed by:
*
* exit((int)spawnv(_P_WAIT, path, argv));
*
* Unfortunately, a bug in Windows spawn/exec impementation prevents
* this from completely working. All the Windows POSIX process creation
* interfaces are implemented as wrappers around the native Windows
* function CreateProcess(). CreateProcess() takes a single string
* to specify command line options and arguments, so the POSIX routine
* wrappers build a single string from the argv[] array and in the
* process, any quoting information is lost.
*
* The solution to this to get the original command line, to process it
* to remove the new multiple JRE options (if any) as was done for argv
* in the common SelectVersion() routine and finally to pass it directly
* to the native CreateProcess() Windows process control interface.
*/
{
char *cmdline;
char *p;
char *np;
char *ocl;
char *ccl;
char *unquoted;
DWORD exitCode;
STARTUPINFO si;
PROCESS_INFORMATION pi;
/*
* The following code block gets and processes the original command
* line, replacing the argv[0] equivalent in the command line with
* the path to the new executable and removing the appropriate
* Multiple JRE support options. Note that similar logic exists
* in the platform independent SelectVersion routine, but is
* replicated here due to the syntax of CreateProcess().
*
* The magic "+ 4" characters added to the command line length are
* 2 possible quotes around the path (argv[0]), a space after the
* path and a terminating null character.
*/
ocl = GetCommandLine();
np = ccl = JLI_StringDup(ocl);
p = nextarg(&np); /* Discard argv[0] */
cmdline = (char *)JLI_MemAlloc(JLI_StrLen(path) + JLI_StrLen(np) + 4);
if (JLI_StrChr(path, (int)' ') == NULL && JLI_StrChr(path, (int)'\t') == NULL)
cmdline = JLI_StrCpy(cmdline, path);
else
cmdline = JLI_StrCat(JLI_StrCat(JLI_StrCpy(cmdline, "\""), path), "\"");
while (*np != (char)0) { /* While more command-line */
p = nextarg(&np);
if (*p != (char)0) { /* If a token was isolated */
unquoted = unquote(p);
if (*unquoted == '-') { /* Looks like an option */
if (JLI_StrCmp(unquoted, "-classpath") == 0 ||
JLI_StrCmp(unquoted, "-cp") == 0) { /* Unique cp syntax */
cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p);
p = nextarg(&np);
if (*p != (char)0) /* If a token was isolated */
cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p);
} else if (JLI_StrNCmp(unquoted, "-version:", 9) != 0 &&
JLI_StrCmp(unquoted, "-jre-restrict-search") != 0 &&
JLI_StrCmp(unquoted, "-no-jre-restrict-search") != 0) {
cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p);
}
} else { /* End of options */
cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), p);
cmdline = JLI_StrCat(JLI_StrCat(cmdline, " "), np);
JLI_MemFree((void *)unquoted);
break;
}
JLI_MemFree((void *)unquoted);
}
}
JLI_MemFree((void *)ccl);
if (JLI_IsTraceLauncher()) {
np = ccl = JLI_StringDup(cmdline);
p = nextarg(&np);
printf("ReExec Command: %s (%s)\n", path, p);
printf("ReExec Args: %s\n", np);
JLI_MemFree((void *)ccl);
}
(void)fflush(stdout);
(void)fflush(stderr);
/*
* The following code is modeled after a model presented in the
* Microsoft Technical Article "Moving Unix Applications to
* Windows NT" (March 6, 1994) and "Creating Processes" on MSDN
* (Februrary 2005). It approximates UNIX spawn semantics with
* the parent waiting for termination of the child.
*/
memset(&si, 0, sizeof(si));
si.cb =sizeof(STARTUPINFO);
memset(&pi, 0, sizeof(pi));
if (!CreateProcess((LPCTSTR)path, /* executable name */
(LPTSTR)cmdline, /* command line */
(LPSECURITY_ATTRIBUTES)NULL, /* process security attr. */
(LPSECURITY_ATTRIBUTES)NULL, /* thread security attr. */
(BOOL)TRUE, /* inherits system handles */
(DWORD)0, /* creation flags */
(LPVOID)NULL, /* environment block */
(LPCTSTR)NULL, /* current directory */
(LPSTARTUPINFO)&si, /* (in) startup information */
(LPPROCESS_INFORMATION)&pi)) { /* (out) process information */
JLI_ReportErrorMessageSys(SYS_ERROR1, path);
exit(1);
}
if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED) {
if (GetExitCodeProcess(pi.hProcess, &exitCode) == FALSE)
exitCode = 1;
} else {
JLI_ReportErrorMessage(SYS_ERROR2);
exitCode = 1;
}
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
exit(exitCode);
}
}
static jboolean
GetPublicJREHome(char *buf, jint bufsize)
{
HKEY key, subkey;
char version[MAXPATHLEN];
/*
* Note: There is a very similar implementation of the following
* registry reading code in the Windows java control panel (javacp.cpl).
* If there are bugs here, a similar bug probably exists there. Hence,
* changes here require inspection there.
*/
/* Find the current version of the JRE */
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, JRE_KEY, 0, KEY_READ, &key) != 0) {
JLI_ReportErrorMessage(REG_ERROR1, JRE_KEY);
return JNI_FALSE;
}
if (!GetStringFromRegistry(key, "CurrentVersion",
version, sizeof(version))) {
JLI_ReportErrorMessage(REG_ERROR2, JRE_KEY);
RegCloseKey(key);
return JNI_FALSE;
}
if (JLI_StrCmp(version, GetDotVersion()) != 0) {
JLI_ReportErrorMessage(REG_ERROR3, JRE_KEY, version, GetDotVersion()
);
RegCloseKey(key);
return JNI_FALSE;
}
/* Find directory where the current version is installed. */
if (RegOpenKeyEx(key, version, 0, KEY_READ, &subkey) != 0) {
JLI_ReportErrorMessage(REG_ERROR1, JRE_KEY, version);
RegCloseKey(key);
return JNI_FALSE;
}
if (!GetStringFromRegistry(subkey, "JavaHome", buf, bufsize)) {
JLI_ReportErrorMessage(REG_ERROR4, JRE_KEY, version);
RegCloseKey(key);
RegCloseKey(subkey);
return JNI_FALSE;
}
if (JLI_IsTraceLauncher()) {
char micro[MAXPATHLEN];
if (!GetStringFromRegistry(subkey, "MicroVersion", micro,
sizeof(micro))) {
printf("Warning: Can't read MicroVersion\n");
micro[0] = '\0';
}
printf("Version major.minor.micro = %s.%s\n", version, micro);
}
RegCloseKey(key);
RegCloseKey(subkey);
return JNI_TRUE;
}
void
CreateExecutionEnvironment(int *pargc, char ***pargv,
char *jrepath, jint so_jrepath,
char *jvmpath, jint so_jvmpath) {
char * jvmtype;
int i = 0;
int running = CURRENT_DATA_MODEL;
int wanted = running;
char** argv = *pargv;
for (i = 0; i < *pargc ; 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;
}
}
if (running != wanted) {
JLI_ReportErrorMessage(JRE_ERROR2, wanted);
exit(1);
}
/* Find out where the JRE is that we will be using. */
if (!GetJREPath(jrepath, so_jrepath)) {
JLI_ReportErrorMessage(JRE_ERROR1);
exit(2);
}
/* Find the specified JVM type */
if (ReadKnownVMs(jrepath, (char*)GetArch(), JNI_FALSE) < 1) {
JLI_ReportErrorMessage(CFG_ERROR7);
exit(1);
}
jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE);
if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
JLI_ReportErrorMessage(CFG_ERROR9);
exit(4);
}
jvmpath[0] = '\0';
if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) {
JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath);
exit(4);
}
/* If we got here, jvmpath has been correctly initialized. */
/* Check if we need preload AWT */
#ifdef ENABLE_AWT_PRELOAD
argv = *pargv;
for (i = 0; i < *pargc ; i++) {
/* Tests the "turn on" parameter only if not set yet. */
if (awtPreloadD3D < 0) {
if (GetBoolParamValue(PARAM_PRELOAD_D3D, argv[i]) == 1) {
awtPreloadD3D = 1;
}
}
/* Test parameters which can disable preloading if not already disabled. */
if (awtPreloadD3D != 0) {
if (GetBoolParamValue(PARAM_NODDRAW, argv[i]) == 1
|| GetBoolParamValue(PARAM_D3D, argv[i]) == 0
|| GetBoolParamValue(PARAM_OPENGL, argv[i]) == 1)
{
awtPreloadD3D = 0;
/* no need to test the rest of the parameters */
break;
}
}
}
#endif /* ENABLE_AWT_PRELOAD */
}
/*
* Starts AWT preloading
*/
int AWTPreload(const char *funcName)
{
int result = -1;
/* load AWT library once (if several preload function should be called) */
if (hPreloadAwt == NULL) {
/* awt.dll is not loaded yet */
char libraryPath[MAXPATHLEN];
size_t jrePathLen = 0;
HMODULE hJava = NULL;
HMODULE hVerify = NULL;
while (1) {
/* awt.dll depends on jvm.dll & java.dll;
* jvm.dll is already loaded, so we need only java.dll;
* java.dll depends on MSVCRT lib & verify.dll.
*/
if (!GetJREPath(libraryPath, MAXPATHLEN)) {
break;
}
/* save path length */
jrePathLen = JLI_StrLen(libraryPath);
if (jrePathLen + JLI_StrLen("\\bin\\verify.dll") >= MAXPATHLEN) {
/* jre path is too long, the library path will not fit there;
* report and abort preloading
*/
JLI_ReportErrorMessage(JRE_ERROR11);
break;
}
/* load msvcrt 1st */
LoadMSVCRT();
/* load verify.dll */
JLI_StrCat(libraryPath, "\\bin\\verify.dll");
hVerify = LoadLibrary(libraryPath);
if (hVerify == NULL) {
break;
}
/* restore jrePath */
libraryPath[jrePathLen] = 0;
/* load java.dll */
JLI_StrCat(libraryPath, "\\bin\\" JAVA_DLL);
hJava = LoadLibrary(libraryPath);
if (hJava == NULL) {
break;
}
/* restore jrePath */
libraryPath[jrePathLen] = 0;
/* load awt.dll */
JLI_StrCat(libraryPath, "\\bin\\awt.dll");
hPreloadAwt = LoadLibrary(libraryPath);
if (hPreloadAwt == NULL) {
break;
}
/* get "preloadStop" func ptr */
fnPreloadStop = (FnPreloadStop *)GetProcAddress(hPreloadAwt, "preloadStop");
break;
}
}
if (hPreloadAwt != NULL) {
FnPreloadStart *fnInit = (FnPreloadStart *)GetProcAddress(hPreloadAwt, funcName);
if (fnInit != NULL) {
/* don't forget to stop preloading */
awtPreloaded = 1;
result = fnInit();
}
}
return result;
}
