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i2p.i2p/installer/c/i2pExe/java.c
str4d 51f072cc72 Migrated limewireExe to i2pExe
2013-04-03 01:52:14 +00:00

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29 KiB
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/*
* Derived from the shared source for the 'java' command line tool.
*
* Original comments as follows:
* Shared source for 'java' command line tool.
*
* If JAVA_ARGS is defined, then acts as a launcher for applications. For
* instance, the JDK command line tools such as javac and javadoc (see
* makefiles for more details) are built with this program. Any arguments
* prefixed with '-J' will be passed directly to the 'java' command.
*/
/*
* One job of the launcher is to remove command line options which the
* vm does not understand and will not process. These options include
* options which select which style of vm is run (e.g. -client and
* -server) as well as options which select the data model to use.
* Additionally, for tools which invoke an underlying vm "-J-foo"
* options are turned into "-foo" options to the vm. This option
* filtering is handled in a number of places in the launcher, some of
* it in machine-dependent code. In this file, the function
* CheckJVMType removes vm style options and TranslateDashJArgs
* removes "-J" prefixes. On unix platforms, the
* CreateExecutionEnvironment function from the unix java_md.c file
* processes and removes -d<n> options. However, in case
* CreateExecutionEnvironment does not need to exec because
* LD_LIBRARY_PATH is set acceptably and the data model does not need
* to be changed, ParseArguments will screen out the redundant -d<n>
* options and prevent them from being passed to the vm; this is done
* by using the machine-dependent call
* RemovableMachineDependentOption.
*/
#include "errors.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "jni.h"
#include "java.h"
#ifndef FULL_VERSION
#define FULL_VERSION JDK_MAJOR_VERSION "." JDK_MINOR_VERSION
#endif
static jboolean printVersion = JNI_FALSE; /* print and exit */
static jboolean showVersion = JNI_FALSE; /* print but continue */
/*
* List of VM options to be specified when the VM is created.
*/
static JavaVMOption *options;
static int numOptions, maxOptions;
/*
* Prototypes for functions internal to launcher.
*/
static void AddOption(char *str, void *info);
static void SetClassPath(char *s);
static jboolean ParseArguments(int *pargc, char ***pargv, char **pjarfile,
char **pclassname, int *pret);
static jboolean InitializeJVM(JavaVM **pvm, JNIEnv **penv,
InvocationFunctions *ifn);
static jstring NewPlatformString(JNIEnv *env, char *s);
static jobjectArray NewPlatformStringArray(JNIEnv *env, char **strv, int strc);
static jclass LoadClass(JNIEnv *env, char *name);
static jstring GetMainClassName(JNIEnv *env, char *jarname);
static void SetJavaCommandLineProp(char* classname, char* jarfile, int argc, char** argv);
static void PrintJavaVersion(JNIEnv *env);
/* Support for options such as -hotspot, -classic etc. */
#define INIT_MAX_KNOWN_VMS 10
#define VM_UNKNOWN -1
#define VM_KNOWN 0
#define VM_ALIASED_TO 1
#define VM_WARN 2
#define VM_ERROR 3
struct vmdesc {
char *name;
int flag;
char *alias;
};
static struct vmdesc *knownVMs = NULL;
static int knownVMsCount = 0;
static int knownVMsLimit = 0;
static void GrowKnownVMs();
static int KnownVMIndex(const char* name);
static void FreeKnownVMs();
/* flag which if set suppresses error messages from the launcher */
static int noExitErrorMessage = 0;
jboolean ServerClassMachine();
/*
* Entry point.
*/
int
launchJVM(int argc, char ** argv)
{
JavaVM *vm = 0;
JNIEnv *env = 0;
char *jarfile = 0;
char *classname = 0;
char *s = 0;
char *main_class = NULL;
jstring mainClassName;
jclass mainClass;
jmethodID mainID;
jobjectArray mainArgs;
int ret;
InvocationFunctions ifn;
char jrepath[MAXPATHLEN], jvmpath[MAXPATHLEN];
char ** original_argv = argv;
int create_ret;
/*
* Error message to print or display; by default the message will
* only be displayed in a window.
*/
char * message = "Fatal exception occurred. Program will exit.";
jboolean messageDest = JNI_FALSE;
/* copy original argv */
{
int i;
original_argv = (char**)MemAlloc(sizeof(char*)*(argc+1));
for(i = 0; i < argc+1; i++)
original_argv[i] = argv[i];
}
create_ret = CreateExecutionEnvironment(&argc, &argv,
jrepath, sizeof(jrepath),
jvmpath, sizeof(jvmpath),
original_argv);
if(create_ret != 0)
return ERROR_COULDNT_FIND_JVM;
ifn.CreateJavaVM = 0;
ifn.GetDefaultJavaVMInitArgs = 0;
if (!LoadJavaVM(jvmpath, &ifn)) {
return ERROR_COULDNT_LOAD_JVM;
}
// ignore the program name when processing arguments.
++argv;
--argc;
/*
* Parse command line options; if the return value of
* ParseArguments is false, the program should exit.
*/
if (!ParseArguments(&argc, &argv, &jarfile, &classname, &ret)) {
return ERROR_COULDNT_PARSE_ARGUMENTS;
}
/* Override class path if -jar flag was specified */
if (jarfile != 0) {
SetClassPath(jarfile);
}
/* set the -Dsun.java.command pseudo property */
SetJavaCommandLineProp(classname, jarfile, argc, argv);
/* Initialize the virtual machine */
if (!InitializeJVM(&vm, &env, &ifn)) {
ReportErrorMessage("Could not create the Java virtual machine.", JNI_TRUE);
return ERROR_COULDNT_INITIALIZE_JVM;
}
if (printVersion || showVersion) {
PrintJavaVersion(env);
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
if (printVersion) {
ret = 0;
message = NULL;
goto leave;
}
if (showVersion) {
fprintf(stderr, "\n");
}
}
/* If the user specified neither a class name nor a JAR file */
if (jarfile == 0 && classname == 0) {
message = NULL;
goto leave;
}
FreeKnownVMs(); /* after last possible PrintUsage() */
/* At this stage, argc/argv have the applications' arguments */
ret = 1;
/* Get the application's main class */
if (jarfile != 0) {
mainClassName = GetMainClassName(env, jarfile);
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
if (mainClassName == NULL) {
const char * format = "Failed to load Main-Class manifest "
"attribute from\n%s";
message = (char*)MemAlloc((strlen(format) + strlen(jarfile)) *
sizeof(char));
sprintf(message, format, jarfile);
messageDest = JNI_TRUE;
goto leave;
}
classname = (char *)(*env)->GetStringUTFChars(env, mainClassName, 0);
if (classname == NULL) {
ReportExceptionDescription(env);
goto leave;
}
mainClass = LoadClass(env, classname);
if(mainClass == NULL) { /* exception occured */
ReportExceptionDescription(env);
message = "Could not find the main class. Program will exit.";
goto leave;
}
(*env)->ReleaseStringUTFChars(env, mainClassName, classname);
} else {
mainClassName = NewPlatformString(env, classname);
if (mainClassName == NULL) {
const char * format = "Failed to load Main Class: %s";
message = (char *)MemAlloc((strlen(format) + strlen(classname)) *
sizeof(char) );
sprintf(message, format, classname);
messageDest = JNI_TRUE;
goto leave;
}
classname = (char *)(*env)->GetStringUTFChars(env, mainClassName, 0);
if (classname == NULL) {
ReportExceptionDescription(env);
goto leave;
}
mainClass = LoadClass(env, classname);
if(mainClass == NULL) { /* exception occured */
ReportExceptionDescription(env);
message = "Could not find the main class. Program will exit.";
goto leave;
}
(*env)->ReleaseStringUTFChars(env, mainClassName, classname);
}
/* Get the application's main method */
mainID = (*env)->GetStaticMethodID(env, mainClass, "main",
"([Ljava/lang/String;)V");
if (mainID == NULL) {
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
} else {
message = "No main method found in specified class.";
messageDest = JNI_TRUE;
}
goto leave;
}
{ /* Make sure the main method is public */
jint mods;
jmethodID mid;
jobject obj = (*env)->ToReflectedMethod(env, mainClass,
mainID, JNI_TRUE);
if( obj == NULL) { /* exception occurred */
ReportExceptionDescription(env);
goto leave;
}
mid =
(*env)->GetMethodID(env,
(*env)->GetObjectClass(env, obj),
"getModifiers", "()I");
if ((*env)->ExceptionOccurred(env)) {
ReportExceptionDescription(env);
goto leave;
}
mods = (*env)->CallIntMethod(env, obj, mid);
if ((mods & 1) == 0) { /* if (!Modifier.isPublic(mods)) ... */
message = "Main method not public.";
messageDest = JNI_TRUE;
goto leave;
}
}
/* Build argument array */
mainArgs = NewPlatformStringArray(env, argv, argc);
if (mainArgs == NULL) {
ReportExceptionDescription(env);
goto leave;
}
/* Invoke main method. */
(*env)->CallStaticVoidMethod(env, mainClass, mainID, mainArgs);
if ((*env)->ExceptionOccurred(env)) {
/*
* Formerly, we used to call the "uncaughtException" method of
* the main thread group, but this was later shown to be
* unnecessary since the default definition merely printed out
* the same exception stack trace as ExceptionDescribe and
* could never actually be overridden by application programs.
*/
ReportExceptionDescription(env);
goto leave;
}
/*
* Detach the current thread so that it appears to have exited when
* the application's main method exits.
*/
if ((*vm)->DetachCurrentThread(vm) != 0) {
message = "Could not detach main thread.";
messageDest = JNI_TRUE;
goto leave;
}
ret = 0;
message = NULL;
leave:
(*vm)->DestroyJavaVM(vm);
if(message != NULL && !noExitErrorMessage)
ReportErrorMessage(message, messageDest);
return ERROR_STARTING_PROGRAM;
}
/*
* Checks the command line options to find which JVM type was
* specified. If no command line option was given for the JVM type,
* the default type is used. The environment variable
* JDK_ALTERNATE_VM and the command line option -XXaltjvm= are also
* checked as ways of specifying which JVM type to invoke.
*/
char *
CheckJvmType(int *pargc, char ***argv, jboolean speculative) {
int i, argi;
int argc;
char **newArgv;
int newArgvIdx = 0;
int isVMType;
int jvmidx = -1;
char *jvmtype = getenv("JDK_ALTERNATE_VM");
argc = *pargc;
/* To make things simpler we always copy the argv array */
newArgv = MemAlloc((argc + 1) * sizeof(char *));
/* The program name is always present */
newArgv[newArgvIdx++] = (*argv)[0];
for (argi = 1; argi < argc; argi++) {
char *arg = (*argv)[argi];
isVMType = 0;
if (strcmp(arg, "-classpath") == 0 ||
strcmp(arg, "-cp") == 0) {
newArgv[newArgvIdx++] = arg;
argi++;
if (argi < argc) {
newArgv[newArgvIdx++] = (*argv)[argi];
}
continue;
}
if (arg[0] != '-') break;
/* Did the user pass an explicit VM type? */
i = KnownVMIndex(arg);
if (i >= 0) {
jvmtype = knownVMs[jvmidx = i].name + 1; /* skip the - */
isVMType = 1;
*pargc = *pargc - 1;
}
/* Did the user specify an "alternate" VM? */
else if (strncmp(arg, "-XXaltjvm=", 10) == 0 || strncmp(arg, "-J-XXaltjvm=", 12) == 0) {
isVMType = 1;
jvmtype = arg+((arg[1]=='X')? 10 : 12);
jvmidx = -1;
}
if (!isVMType) {
newArgv[newArgvIdx++] = arg;
}
}
/*
* Finish copying the arguments if we aborted the above loop.
* NOTE that if we aborted via "break" then we did NOT copy the
* last argument above, and in addition argi will be less than
* argc.
*/
while (argi < argc) {
newArgv[newArgvIdx++] = (*argv)[argi];
argi++;
}
/* argv is null-terminated */
newArgv[newArgvIdx] = 0;
/* Copy back argv */
*argv = newArgv;
*pargc = newArgvIdx;
/* use the default VM type if not specified (no alias processing) */
if (jvmtype == NULL)
return knownVMs[0].name+1;
/* if using an alternate VM, no alias processing */
if (jvmidx < 0)
return jvmtype;
/* Resolve aliases first */
{
int loopCount = 0;
while (knownVMs[jvmidx].flag == VM_ALIASED_TO) {
int nextIdx = KnownVMIndex(knownVMs[jvmidx].alias);
if (loopCount > knownVMsCount) {
if (!speculative) {
ReportErrorMessage("Error: Corrupt jvm.cfg file; cycle in alias list.",
JNI_TRUE);
return "ERROR";
} else {
return "ERROR";
/* break; */
}
}
if (nextIdx < 0) {
if (!speculative) {
ReportErrorMessage2("Error: Unable to resolve VM alias %s",
knownVMs[jvmidx].alias, JNI_TRUE);
return "ERROR";
} else {
return "ERROR";
}
}
jvmidx = nextIdx;
jvmtype = knownVMs[jvmidx].name+1;
loopCount++;
}
}
switch (knownVMs[jvmidx].flag) {
case VM_WARN:
if (!speculative) {
fprintf(stderr, "Warning: %s VM not supported; %s VM will be used\n",
jvmtype, knownVMs[0].name + 1);
}
jvmtype = knownVMs[jvmidx=0].name + 1;
/* fall through */
case VM_KNOWN:
break;
case VM_ERROR:
if (!speculative) {
ReportErrorMessage2("Error: %s VM not supported", jvmtype, JNI_TRUE);
return "ERROR";
} else {
return "ERROR";
}
}
return jvmtype;
}
/*
* Adds a new VM option with the given given name and value.
*/
static void
AddOption(char *str, void *info)
{
/*
* Expand options array if needed to accommodate at least one more
* VM option.
*/
if (numOptions >= maxOptions) {
if (options == 0) {
maxOptions = 4;
options = MemAlloc(maxOptions * sizeof(JavaVMOption));
} else {
JavaVMOption *tmp;
maxOptions *= 2;
tmp = MemAlloc(maxOptions * sizeof(JavaVMOption));
memcpy(tmp, options, numOptions * sizeof(JavaVMOption));
free(options);
options = tmp;
}
}
options[numOptions].optionString = str;
options[numOptions++].extraInfo = info;
}
static void
SetClassPath(char *s)
{
char *def = MemAlloc(strlen(s) + 40);
sprintf(def, "-Djava.class.path=%s", s);
AddOption(def, NULL);
}
/*
* Parses command line arguments. Returns JNI_FALSE if launcher
* should exit without starting vm (e.g. certain version and usage
* options); returns JNI_TRUE if vm needs to be started to process
* given options. *pret (the launcher process return value) is set to
* 0 for a normal exit.
*/
static jboolean
ParseArguments(int *pargc, char ***pargv, char **pjarfile,
char **pclassname, int *pret)
{
int argc = *pargc;
char **argv = *pargv;
jboolean jarflag = JNI_FALSE;
char *arg;
*pret = 1;
while ((arg = *argv) != 0 && *arg == '-') {
argv++; --argc;
if (strcmp(arg, "-classpath") == 0 || strcmp(arg, "-cp") == 0) {
if (argc < 1) {
ReportErrorMessage2("%s requires class path specification",
arg, JNI_TRUE);
return JNI_FALSE;
}
SetClassPath(*argv);
argv++; --argc;
} else if (strcmp(arg, "-jar") == 0) {
jarflag = JNI_TRUE;
} else if (strcmp(arg, "-version") == 0) {
printVersion = JNI_TRUE;
return JNI_TRUE;
} else if (strcmp(arg, "-showversion") == 0) {
showVersion = JNI_TRUE;
} else if (strcmp(arg, "-X") == 0) {
*pret = 0;
return JNI_FALSE;
/*
* The following case provide backward compatibility with old-style
* command line options.
*/
} else if (strcmp(arg, "-verbosegc") == 0) {
AddOption("-verbose:gc", NULL);
} else if (strcmp(arg, "-t") == 0) {
AddOption("-Xt", NULL);
} else if (strcmp(arg, "-tm") == 0) {
AddOption("-Xtm", NULL);
} else if (strcmp(arg, "-debug") == 0) {
AddOption("-Xdebug", NULL);
} else if (strcmp(arg, "-noclassgc") == 0) {
AddOption("-Xnoclassgc", NULL);
} else if (strcmp(arg, "-Xfuture") == 0) {
AddOption("-Xverify:all", NULL);
} else if (strcmp(arg, "-verify") == 0) {
AddOption("-Xverify:all", NULL);
} else if (strcmp(arg, "-verifyremote") == 0) {
AddOption("-Xverify:remote", NULL);
} else if (strcmp(arg, "-noverify") == 0) {
AddOption("-Xverify:none", NULL);
} else if (strcmp(arg, "-XXsuppressExitMessage") == 0) {
noExitErrorMessage = 1;
} else if (strncmp(arg, "-prof", 5) == 0) {
char *p = arg + 5;
char *tmp = MemAlloc(strlen(arg) + 50);
if (*p) {
sprintf(tmp, "-Xrunhprof:cpu=old,file=%s", p + 1);
} else {
sprintf(tmp, "-Xrunhprof:cpu=old,file=java.prof");
}
AddOption(tmp, NULL);
} else if (strncmp(arg, "-ss", 3) == 0 ||
strncmp(arg, "-oss", 4) == 0 ||
strncmp(arg, "-ms", 3) == 0 ||
strncmp(arg, "-mx", 3) == 0) {
char *tmp = MemAlloc(strlen(arg) + 6);
sprintf(tmp, "-X%s", arg + 1); /* skip '-' */
AddOption(tmp, NULL);
} else if (strcmp(arg, "-checksource") == 0 ||
strcmp(arg, "-cs") == 0 ||
strcmp(arg, "-noasyncgc") == 0) {
/* No longer supported */
fprintf(stderr,
"Warning: %s option is no longer supported.\n",
arg);
} else if (strncmp(arg, "-version:", 9) == 0 ||
strcmp(arg, "-no-jre-restrict-search") == 0 ||
strcmp(arg, "-jre-restrict-search") == 0) {
; /* Ignore machine independent options already handled */
} else if (RemovableMachineDependentOption(arg) ) {
; /* Do not pass option to vm. */
}
else {
AddOption(arg, NULL);
}
}
if (--argc >= 0) {
if (jarflag) {
*pjarfile = *argv++;
*pclassname = 0;
} else {
*pjarfile = 0;
*pclassname = *argv++;
}
*pargc = argc;
*pargv = argv;
}
return JNI_TRUE;
}
/*
* Initializes the Java Virtual Machine. Also frees options array when
* finished.
*/
static jboolean
InitializeJVM(JavaVM **pvm, JNIEnv **penv, InvocationFunctions *ifn)
{
JavaVMInitArgs args;
jint r;
memset(&args, 0, sizeof(args));
args.version = JNI_VERSION_1_2;
args.nOptions = numOptions;
args.options = options;
args.ignoreUnrecognized = JNI_FALSE;
r = ifn->CreateJavaVM(pvm, (void **)penv, &args);
free(options);
return r == JNI_OK;
}
#define NULL_CHECK0(e) if ((e) == 0) return 0
#define NULL_CHECK(e) if ((e) == 0) return
/*
* Returns a pointer to a block of at least 'size' bytes of memory.
* Prints error message and exits if the memory could not be allocated.
*/
void *
MemAlloc(size_t size)
{
void *p = malloc(size);
if (p == 0) {
perror("malloc");
exit(1);
}
return p;
}
/*
* Returns a new Java string object for the specified platform string.
*/
static jstring
NewPlatformString(JNIEnv *env, char *s)
{
int len = (int)strlen(s);
jclass cls;
jmethodID mid;
jbyteArray ary;
if (s == NULL)
return 0;
NULL_CHECK0(cls = (*env)->FindClass(env, "java/lang/String"));
NULL_CHECK0(mid = (*env)->GetMethodID(env, cls, "<init>", "([B)V"));
ary = (*env)->NewByteArray(env, len);
if (ary != 0) {
jstring str = 0;
(*env)->SetByteArrayRegion(env, ary, 0, len, (jbyte *)s);
if (!(*env)->ExceptionOccurred(env)) {
str = (*env)->NewObject(env, cls, mid, ary);
}
(*env)->DeleteLocalRef(env, ary);
return str;
}
return 0;
}
/*
* Returns a new array of Java string objects for the specified
* array of platform strings.
*/
static jobjectArray
NewPlatformStringArray(JNIEnv *env, char **strv, int strc)
{
jarray cls;
jarray ary;
int i;
NULL_CHECK0(cls = (*env)->FindClass(env, "java/lang/String"));
NULL_CHECK0(ary = (*env)->NewObjectArray(env, strc, cls, 0));
for (i = 0; i < strc; i++) {
jstring str = NewPlatformString(env, *strv++);
NULL_CHECK0(str);
(*env)->SetObjectArrayElement(env, ary, i, str);
(*env)->DeleteLocalRef(env, str);
}
return ary;
}
/*
* Loads a class, convert the '.' to '/'.
*/
static jclass
LoadClass(JNIEnv *env, char *name)
{
char *buf = MemAlloc(strlen(name) + 1);
char *s = buf, *t = name, c;
jclass cls;
do {
c = *t++;
*s++ = (c == '.') ? '/' : c;
} while (c != '\0');
cls = (*env)->FindClass(env, buf);
free(buf);
return cls;
}
/*
* Returns the main class name for the specified jar file.
*/
static jstring
GetMainClassName(JNIEnv *env, char *jarname)
{
#define MAIN_CLASS "Main-Class"
jclass cls;
jmethodID mid;
jobject jar, man, attr;
jstring str, result = 0;
NULL_CHECK0(cls = (*env)->FindClass(env, "java/util/jar/JarFile"));
NULL_CHECK0(mid = (*env)->GetMethodID(env, cls, "<init>",
"(Ljava/lang/String;)V"));
NULL_CHECK0(str = NewPlatformString(env, jarname));
NULL_CHECK0(jar = (*env)->NewObject(env, cls, mid, str));
NULL_CHECK0(mid = (*env)->GetMethodID(env, cls, "getManifest",
"()Ljava/util/jar/Manifest;"));
man = (*env)->CallObjectMethod(env, jar, mid);
if (man != 0) {
NULL_CHECK0(mid = (*env)->GetMethodID(env,
(*env)->GetObjectClass(env, man),
"getMainAttributes",
"()Ljava/util/jar/Attributes;"));
attr = (*env)->CallObjectMethod(env, man, mid);
if (attr != 0) {
NULL_CHECK0(mid = (*env)->GetMethodID(env,
(*env)->GetObjectClass(env, attr),
"getValue",
"(Ljava/lang/String;)Ljava/lang/String;"));
NULL_CHECK0(str = NewPlatformString(env, MAIN_CLASS));
result = (*env)->CallObjectMethod(env, attr, mid, str);
}
}
return result;
}
/*
* inject the -Dsun.java.command pseudo property into the args structure
* this pseudo property is used in the HotSpot VM to expose the
* Java class name and arguments to the main method to the VM. The
* HotSpot VM uses this pseudo property to store the Java class name
* (or jar file name) and the arguments to the class's main method
* to the instrumentation memory region. The sun.java.command pseudo
* property is not exported by HotSpot to the Java layer.
*/
void
SetJavaCommandLineProp(char *classname, char *jarfile,
int argc, char **argv)
{
int i = 0;
size_t len = 0;
char* javaCommand = NULL;
char* dashDstr = "-Dsun.java.command=";
if (classname == NULL && jarfile == NULL) {
/* unexpected, one of these should be set. just return without
* setting the property
*/
return;
}
/* if the class name is not set, then use the jarfile name */
if (classname == NULL) {
classname = jarfile;
}
/* determine the amount of memory to allocate assuming
* the individual components will be space separated
*/
len = strlen(classname);
for (i = 0; i < argc; i++) {
len += strlen(argv[i]) + 1;
}
/* allocate the memory */
javaCommand = (char*) MemAlloc(len + strlen(dashDstr) + 1);
/* build the -D string */
*javaCommand = '\0';
strcat(javaCommand, dashDstr);
strcat(javaCommand, classname);
for (i = 0; i < argc; i++) {
/* the components of the string are space separated. In
* the case of embedded white space, the relationship of
* the white space separated components to their true
* positional arguments will be ambiguous. This issue may
* be addressed in a future release.
*/
strcat(javaCommand, " ");
strcat(javaCommand, argv[i]);
}
AddOption(javaCommand, NULL);
}
/*
* Prints the version information from the java.version and other properties.
*/
static void
PrintJavaVersion(JNIEnv *env)
{
jclass ver;
jmethodID print;
NULL_CHECK(ver = (*env)->FindClass(env, "sun/misc/Version"));
NULL_CHECK(print = (*env)->GetStaticMethodID(env, ver, "print", "()V"));
(*env)->CallStaticVoidMethod(env, ver, print);
}
/*
* Read the jvm.cfg file and fill the knownJVMs[] array.
*
* The functionality of the jvm.cfg file is subject to change without
* notice and the mechanism will be removed in the future.
*
* The lexical structure of the jvm.cfg file is as follows:
*
* jvmcfg := { vmLine }
* vmLine := knownLine
* | aliasLine
* | warnLine
* | errorLine
* | commentLine
* knownLine := flag "KNOWN" EOL
* warnLine := flag "WARN" EOL
* errorLine := flag "ERROR" EOL
* aliasLine := flag "ALIASED_TO" flag EOL
* commentLine := "#" text EOL
* flag := "-" identifier
*
* The semantics are that when someone specifies a flag on the command line:
* - if the flag appears on a knownLine, then the identifier is used as
* the name of the directory holding the JVM library (the name of the JVM).
* - if the flag appears as the first flag on an aliasLine, the identifier
* of the second flag is used as the name of the JVM.
* - if the flag appears on a warnLine, the identifier is used as the
* name of the JVM, but a warning is generated.
* - if the flag appears on an errorLine, an error is generated.
* If no flag is given on the command line, the first vmLine of the jvm.cfg
* file determines the name of the JVM.
*
* The intent of the jvm.cfg file is to allow several JVM libraries to
* be installed in different subdirectories of a single JRE installation,
* for space-savings and convenience in testing.
* The intent is explicitly not to provide a full aliasing or predicate
* mechanism.
*/
jint
ReadKnownVMs(const char *jrepath, char * arch, jboolean speculative)
{
FILE *jvmCfg;
char jvmCfgName[MAXPATHLEN+20];
char line[MAXPATHLEN+20];
int cnt = 0;
int lineno = 0;
int vmType;
char *tmpPtr;
char *altVMName;
struct stat s;
static char *whiteSpace = " \t";
sprintf(jvmCfgName, "%s\\lib\\%s\\jvm.cfg\0", jrepath, arch);
if(stat(jvmCfgName, &s) != 0)
// try without arch -- for java 1.3 compatability
sprintf(jvmCfgName, "%s\\lib\\jvm.cfg\0", jrepath);
jvmCfg = fopen(jvmCfgName, "r");
if (jvmCfg == NULL) {
if (!speculative) {
ReportErrorMessage2("Error: could not open `%s'", jvmCfgName,
JNI_TRUE);
return -1;
} else {
return -1;
}
}
while (fgets(line, sizeof(line), jvmCfg) != NULL) {
vmType = VM_UNKNOWN;
lineno++;
if (line[0] == '#')
continue;
if (line[0] != '-') {
fprintf(stderr, "Warning: no leading - on line %d of `%s'\n",
lineno, jvmCfgName);
}
if (cnt >= knownVMsLimit) {
GrowKnownVMs(cnt);
}
line[strlen(line)-1] = '\0'; /* remove trailing newline */
tmpPtr = line + strcspn(line, whiteSpace);
if (*tmpPtr == 0) {
fprintf(stderr, "Warning: missing VM type on line %d of `%s'\n",
lineno, jvmCfgName);
vmType = VM_KNOWN; // assume known, for java 1.3 compatability
} else {
/* Null-terminate this string for strdup below */
*tmpPtr++ = 0;
tmpPtr += strspn(tmpPtr, whiteSpace);
if (*tmpPtr == 0) {
fprintf(stderr, "Warning: missing VM type on line %d of `%s'\n",
lineno, jvmCfgName);
} else {
if (!strncmp(tmpPtr, "KNOWN", strlen("KNOWN"))) {
vmType = VM_KNOWN;
} else if (!strncmp(tmpPtr, "ALIASED_TO", strlen("ALIASED_TO"))) {
tmpPtr += strcspn(tmpPtr, whiteSpace);
if (*tmpPtr != 0) {
tmpPtr += strspn(tmpPtr, whiteSpace);
}
if (*tmpPtr == 0) {
fprintf(stderr, "Warning: missing VM alias on line %d of `%s'\n",
lineno, jvmCfgName);
} else {
/* Null terminate altVMName */
altVMName = tmpPtr;
tmpPtr += strcspn(tmpPtr, whiteSpace);
*tmpPtr = 0;
vmType = VM_ALIASED_TO;
}
} else if (!strncmp(tmpPtr, "WARN", strlen("WARN"))) {
vmType = VM_WARN;
} else if (!strncmp(tmpPtr, "ERROR", strlen("ERROR"))) {
vmType = VM_ERROR;
} else {
fprintf(stderr, "Warning: unknown VM type on line %d of `%s'\n",
lineno, &jvmCfgName[0]);
vmType = VM_KNOWN;
}
}
}
if (vmType != VM_UNKNOWN) {
knownVMs[cnt].name = strdup(line);
knownVMs[cnt].flag = vmType;
switch (vmType) {
default:
break;
case VM_ALIASED_TO:
knownVMs[cnt].alias = strdup(altVMName);
break;
}
cnt++;
}
}
fclose(jvmCfg);
knownVMsCount = cnt;
return cnt;
}
static void
GrowKnownVMs(int minimum)
{
struct vmdesc* newKnownVMs;
int newMax;
newMax = (knownVMsLimit == 0 ? INIT_MAX_KNOWN_VMS : (2 * knownVMsLimit));
if (newMax <= minimum) {
newMax = minimum;
}
newKnownVMs = (struct vmdesc*) MemAlloc(newMax * sizeof(struct vmdesc));
if (knownVMs != NULL) {
memcpy(newKnownVMs, knownVMs, knownVMsLimit * sizeof(struct vmdesc));
}
free(knownVMs);
knownVMs = newKnownVMs;
knownVMsLimit = newMax;
}
/* Returns index of VM or -1 if not found */
static int
KnownVMIndex(const char* name)
{
int i;
if (strncmp(name, "-J", 2) == 0) name += 2;
for (i = 0; i < knownVMsCount; i++) {
if (!strcmp(name, knownVMs[i].name)) {
return i;
}
}
return -1;
}
static void
FreeKnownVMs()
{
int i;
for (i = 0; i < knownVMsCount; i++) {
free(knownVMs[i].name);
knownVMs[i].name = NULL;
}
free(knownVMs);
}
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