bool GetJREPath(char* path, size_t pathSize, const char* configFile,
const char* arch)
{
bool found = false;
if (arch == NULL) {
arch = GetArchPath();
}
// check if a JRE location is specified in the config file
if (!found && configFile != NULL) {
found = GetJREPathFromConfig(path, pathSize, configFile);
}
// check if a JRE is specified in an ENV var (eg. JAVA_HOME)
if (!found) {
found = GetJREPathFromEnvVars(path, pathSize, arch);
}
// check if a JRE is located in a common location
if (!found) {
found = GetJREPathOSSpecific(path, pathSize, arch);
}
return found;
}
/*
* 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;
}
/*
* On Solaris VM choosing is done by the launcher (java.c).
*/
bool GetJVMPath(const char* jrePath, const char* jvmType,
char* jvmPath, size_t jvmPathSize, const char* arch)
{
if (arch == NULL) {
arch = GetArchPath();
}
if (*jvmType == '/') {
SNPRINTF(jvmPath, jvmPathSize, "%s/"JVM_LIB, jvmType);
} else {
SNPRINTF(jvmPath, jvmPathSize, "%s/lib/%s/%s/"JVM_LIB, jrePath, arch,
jvmType);
}
return FileExists(jvmPath);
}
/*
* Given a JRE location and a JVM type, construct what the name the
* JVM shared library will be. Return true, if such a library
* exists, false otherwise.
*/
bool GetJVMPath(const char* jrePath, const char* jvmType,
char* jvmPath, size_t jvmPathSize, const char* arch)
{
if (arch == NULL) {
arch = GetArchPath();
}
if ((*jvmType == '/') || (*jvmType == '\\')) {
SNPRINTF(jvmPath, jvmPathSize, "%s\\"JVM_LIB, jvmType);
} else {
SNPRINTF(jvmPath, jvmPathSize, "%s\\bin\\%s\\"JVM_LIB, jrePath,
jvmType);
}
return FileExists(jvmPath);
}
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. 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);
}
}
