/*
* Determine if there is an acceptable JRE in the registry directory top_key.
* 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.
*
* It doesn't matter if we get an error reading the registry, or we just
* don't find anything interesting in the directory. We just return NULL
* in either case.
*/
static char *
ProcessDir(manifest_info* info, HKEY top_key) {
DWORD index = 0;
HKEY ver_key;
char name[MAXNAMELEN];
int len;
char *best = NULL;
/*
* Enumerate "<top_key>/SOFTWARE/JavaSoft/Java Runtime Environment"
* searching for the best available version.
*/
while (RegEnumKey(top_key, index, name, MAXNAMELEN) == ERROR_SUCCESS) {
index++;
if (JLI_AcceptableRelease(name, info->jre_version))
if ((best == NULL) || (JLI_ExactVersionId(name, best) > 0)) {
if (best != NULL)
JLI_MemFree(best);
best = JLI_StringDup(name);
}
}
/*
* Extract "JavaHome" from the "best" registry directory and return
* that path. If no appropriate version was located, or there is an
* error in extracting the "JavaHome" string, return null.
*/
if (best == NULL)
return (NULL);
else {
if (RegOpenKeyEx(top_key, best, 0, KEY_READ, &ver_key)
!= ERROR_SUCCESS) {
JLI_MemFree(best);
if (ver_key != NULL)
RegCloseKey(ver_key);
return (NULL);
}
JLI_MemFree(best);
len = MAXNAMELEN;
if (RegQueryValueEx(ver_key, "JavaHome", NULL, NULL, (LPBYTE)name, &len)
!= ERROR_SUCCESS) {
if (ver_key != NULL)
RegCloseKey(ver_key);
return (NULL);
}
if (ver_key != NULL)
RegCloseKey(ver_key);
return (JLI_StringDup(name));
}
}
/*
* 从给定目录中搜索与指定版本最匹配的jre安装路径
*/
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];
printf("%s[%d] [tid: %lu]: 开始从目录[%]中搜索安装的最佳jre版本...\n", __FILE__, __LINE__, pthread_self(), dirname);
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){
printf("%s[%d] [tid: %lu]: 目录[%]中没有找到合适的jre版本...\n", __FILE__, __LINE__, pthread_self(), dirname);
return (NULL);
}
else {
ret_str = JLI_MemAlloc(JLI_StrLen(dirname) + JLI_StrLen(best) + 2);
sprintf(ret_str, "%s/%s", dirname, best);
JLI_MemFree(best);
printf("%s[%d] [tid: %lu]: 搜索到最合适的jre版本: %s...\n", __FILE__, __LINE__, pthread_self(), ret_str);
return (ret_str);
}
}
/*
* 搜索指定的jre环境
*/
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 = '\0';
if ((target = ProcessDir(info, dp)) != NULL)
break;
dp = cp;
if (dp != NULL)
dp++;
}
JLI_MemFree(path);
return (target);
}
/*
* Modeled after strcmp(), compare two version-ids for an Exact
* Match as defined in JSR 56.
*/
int
JLI_ExactVersionId(const char *id1, char *id2)
{
char *s1 = JLI_StringDup(id1);
char *s2 = JLI_StringDup(id2);
char *m1 = s1;
char *m2 = s2;
char *end1 = NULL;
char *end2 = NULL;
int res = 0;
do {
if ((s1 != NULL) && ((end1 = JLI_StrPBrk(s1, separators)) != NULL))
*end1 = '\0';
if ((s2 != NULL) && ((end2 = JLI_StrPBrk(s2, separators)) != NULL))
*end2 = '\0';
if ((s1 != NULL) && (s2 == NULL))
res = comp_string(s1, zero_string);
else if ((s1 == NULL) && (s2 != NULL))
res = comp_string(zero_string, s2);
else
res = comp_string(s1, s2);
if (end1 != NULL)
s1 = end1 + 1;
else
s1 = NULL;
if (end2 != NULL)
s2 = end2 + 1;
else
s2 = NULL;
} while (res == 0 && ((s1 != NULL) || (s2 != NULL)));
JLI_MemFree(m1);
JLI_MemFree(m2);
return (res);
}
/*
* 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;
}
/*
* contains a lib/$LIBARCH/{server,client}/libjvm.so ?
*/
static jboolean
ContainsLibJVM(int wanted, const char *env) {
char clientPattern[PATH_MAX + 1];
char serverPattern[PATH_MAX + 1];
char *envpath;
char *path;
jboolean clientPatternFound;
jboolean serverPatternFound;
/* fastest path */
if (env == NULL) {
return JNI_FALSE;
}
/* the usual suspects */
JLI_Snprintf(clientPattern, PATH_MAX, "lib/%s/client", GetArchPath(wanted));
JLI_Snprintf(serverPattern, PATH_MAX, "lib/%s/server", GetArchPath(wanted));
/* 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 = JLI_StrTok(envpath, ":"); path != NULL; path = JLI_StrTok(NULL, ":")) {
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;
}
/*
* Checks if release is acceptable by the specification version-string.
* Return true if this version-string (as defined in JSR 56) forms
* an acceptable match. A version-string is the union (or) of multiple
* elements.
*/
int
JLI_AcceptableRelease(const char *release, char *version_string)
{
char *vs;
char *m1;
char *end;
m1 = vs = JLI_StringDup(version_string);
do {
if ((end = JLI_StrChr(vs, ' ')) != NULL)
*end = '\0';
if (acceptable_element(release, vs)) {
JLI_MemFree(m1);
return (1);
}
if (end != NULL)
vs = end + 1;
} while (end != NULL);
JLI_MemFree(m1);
return (0);
}
static WildcardIterator
WildcardIterator_for(const char *wildcard)
{
DIR *dir;
int wildlen = JLI_StrLen(wildcard);
if (wildlen < 2) {
dir = opendir(".");
} else {
char *dirname = JLI_StringDup(wildcard);
dirname[wildlen - 1] = '\0';
dir = opendir(dirname);
JLI_MemFree(dirname);
}
if (dir == NULL)
return NULL;
else {
WildcardIterator it = NEW_(WildcardIterator);
it->dir = dir;
return it;
}
}
/*
* Validates a version string by the extended JSR 56 grammar.
*/
int
JLI_ValidVersionString(char *version_string)
{
char *vs;
char *m1;
char *end;
if ((version_string == NULL) || (JLI_StrLen(version_string) == 0))
return (0);
m1 = vs = JLI_StringDup(version_string);
do {
if ((end = JLI_StrChr(vs, ' ')) != NULL)
*end = '\0';
if (!valid_element(vs)) {
JLI_MemFree(m1);
return (0);
}
if (end != NULL)
vs = end + 1;
} while (end != NULL);
JLI_MemFree(m1);
return (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 *progname;
char path[MAXPATHLEN + 1];
/*
* Determine the executable we are building (or in the rare case, running).
*/
#ifdef JAVA_ARGS /* javac, jar and friends. */
progname = "java";
#else /* java, oldjava, javaw and friends */
#ifdef PROGNAME
progname = PROGNAME;
#else
{
char *s;
progname = *argv;
if ((s = strrchr(progname, FILE_SEPARATOR)) != 0) {
progname = s + 1;
}
}
#endif /* PROGNAME */
#endif /* JAVA_ARGS */
/*
* Resolve the real path to the currently running launcher.
*/
len = GetModuleFileName(NULL, path, MAXPATHLEN + 1);
if (len == 0 || len > MAXPATHLEN) {
ReportSysErrorMessage2(
"Unable to resolve path to current %s executable: %s",
progname, JNI_TRUE);
exit(1);
}
if (_launcher_debug) {
printf("ExecJRE: old: %s\n", path);
printf("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. (strnicmp() is the Windows equiv. of strncasecmp().)
*/
if (strnicmp(jre, path, strlen(jre)) == 0)
return; /* I am the droid you were looking for */
/*
* If this isn't the selected version, exec the selected version.
*/
(void)strcat(strcat(strcpy(path, jre), "\\bin\\"), progname);
(void)strcat(path, ".exe");
/*
* 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);
* ReportErrorMessage2("Exec of %s failed\n", path, JNI_TRUE);
* 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(strlen(path) + strlen(np) + 4);
if (strchr(path, (int)' ') == NULL && strchr(path, (int)'\t') == NULL)
cmdline = strcpy(cmdline, path);
else
cmdline = strcat(strcat(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 (strcmp(unquoted, "-classpath") == 0 ||
strcmp(unquoted, "-cp") == 0) { /* Unique cp syntax */
cmdline = strcat(strcat(cmdline, " "), p);
p = nextarg(&np);
if (*p != (char)0) /* If a token was isolated */
cmdline = strcat(strcat(cmdline, " "), p);
} else if (strncmp(unquoted, "-version:", 9) != 0 &&
strcmp(unquoted, "-jre-restrict-search") != 0 &&
strcmp(unquoted, "-no-jre-restrict-search") != 0) {
cmdline = strcat(strcat(cmdline, " "), p);
}
} else { /* End of options */
cmdline = strcat(strcat(cmdline, " "), p);
cmdline = strcat(strcat(cmdline, " "), np);
JLI_MemFree((void *)unquoted);
break;
}
JLI_MemFree((void *)unquoted);
}
}
JLI_MemFree((void *)ccl);
if (_launcher_debug) {
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 */
ReportSysErrorMessage2("CreateProcess(%s, ...) failed: %s",
path, JNI_TRUE);
exit(1);
}
if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED) {
if (GetExitCodeProcess(pi.hProcess, &exitCode) == FALSE)
exitCode = 1;
} else {
ReportErrorMessage("WaitForSingleObject() failed.", JNI_TRUE);
exitCode = 1;
}
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
exit(exitCode);
}
}
/*
* 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);
}
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);
}
}
