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src/hotspot/share/prims/jvm.cpp
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rev 52360 : 8212605: Pure-Java implementation of AccessController.doPrivileged
*** 53,63 ****
#include "oops/oop.inline.hpp"
#include "prims/jvm_misc.hpp"
#include "prims/jvmtiExport.hpp"
#include "prims/jvmtiThreadState.hpp"
#include "prims/nativeLookup.hpp"
- #include "prims/privilegedStack.hpp"
#include "prims/stackwalk.hpp"
#include "runtime/arguments.hpp"
#include "runtime/atomic.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/init.hpp"
--- 53,62 ----
*** 1164,1322 ****
oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
return (jobject) JNIHandles::make_local(env, pd);
JVM_END
- static bool is_authorized(Handle context, InstanceKlass* klass, TRAPS) {
- // If there is a security manager and protection domain, check the access
- // in the protection domain, otherwise it is authorized.
- if (java_lang_System::has_security_manager()) {
-
- // For bootstrapping, if pd implies method isn't in the JDK, allow
- // this context to revert to older behavior.
- // In this case the isAuthorized field in AccessControlContext is also not
- // present.
- if (Universe::protection_domain_implies_method() == NULL) {
- return true;
- }
-
- // Whitelist certain access control contexts
- if (java_security_AccessControlContext::is_authorized(context)) {
- return true;
- }
-
- oop prot = klass->protection_domain();
- if (prot != NULL) {
- // Call pd.implies(new SecurityPermission("createAccessControlContext"))
- // in the new wrapper.
- methodHandle m(THREAD, Universe::protection_domain_implies_method());
- Handle h_prot(THREAD, prot);
- JavaValue result(T_BOOLEAN);
- JavaCallArguments args(h_prot);
- JavaCalls::call(&result, m, &args, CHECK_false);
- return (result.get_jboolean() != 0);
- }
- }
- return true;
- }
-
- // Create an AccessControlContext with a protection domain with null codesource
- // and null permissions - which gives no permissions.
- oop create_dummy_access_control_context(TRAPS) {
- InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
- // Call constructor ProtectionDomain(null, null);
- Handle obj = JavaCalls::construct_new_instance(pd_klass,
- vmSymbols::codesource_permissioncollection_signature(),
- Handle(), Handle(), CHECK_NULL);
-
- // new ProtectionDomain[] {pd};
- objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
- context->obj_at_put(0, obj());
-
- // new AccessControlContext(new ProtectionDomain[] {pd})
- objArrayHandle h_context(THREAD, context);
- oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
- return acc;
- }
-
- JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
- JVMWrapper("JVM_DoPrivileged");
-
- if (action == NULL) {
- THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
- }
-
- // Compute the frame initiating the do privileged operation and setup the privileged stack
- vframeStream vfst(thread);
- vfst.security_get_caller_frame(1);
-
- if (vfst.at_end()) {
- THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
- }
-
- Method* method = vfst.method();
- InstanceKlass* klass = method->method_holder();
-
- // Check that action object understands "Object run()"
- Handle h_context;
- if (context != NULL) {
- h_context = Handle(THREAD, JNIHandles::resolve(context));
- bool authorized = is_authorized(h_context, klass, CHECK_NULL);
- if (!authorized) {
- // Create an unprivileged access control object and call it's run function
- // instead.
- oop noprivs = create_dummy_access_control_context(CHECK_NULL);
- h_context = Handle(THREAD, noprivs);
- }
- }
-
- // Check that action object understands "Object run()"
- Handle object (THREAD, JNIHandles::resolve(action));
-
- // get run() method
- Method* m_oop = object->klass()->uncached_lookup_method(
- vmSymbols::run_method_name(),
- vmSymbols::void_object_signature(),
- Klass::find_overpass);
-
- // See if there is a default method for "Object run()".
- if (m_oop == NULL && object->klass()->is_instance_klass()) {
- InstanceKlass* iklass = InstanceKlass::cast(object->klass());
- m_oop = iklass->lookup_method_in_ordered_interfaces(
- vmSymbols::run_method_name(),
- vmSymbols::void_object_signature());
- }
-
- methodHandle m (THREAD, m_oop);
- if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static() || m()->is_abstract()) {
- THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
- }
-
- // Stack allocated list of privileged stack elements
- PrivilegedElement pi;
- if (!vfst.at_end()) {
- pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
- thread->set_privileged_stack_top(&pi);
- }
-
-
- // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
- // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
- Handle pending_exception;
- JavaValue result(T_OBJECT);
- JavaCallArguments args(object);
- JavaCalls::call(&result, m, &args, THREAD);
-
- // done with action, remove ourselves from the list
- if (!vfst.at_end()) {
- assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
- thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
- }
-
- if (HAS_PENDING_EXCEPTION) {
- pending_exception = Handle(THREAD, PENDING_EXCEPTION);
- CLEAR_PENDING_EXCEPTION;
- // JVMTI has already reported the pending exception
- // JVMTI internal flag reset is needed in order to report PrivilegedActionException
- if (THREAD->is_Java_thread()) {
- JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
- }
- if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
- !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
- // Throw a java.security.PrivilegedActionException(Exception e) exception
- JavaCallArguments args(pending_exception);
- THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
- vmSymbols::exception_void_signature(),
- &args);
- }
- }
-
- if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
- return JNIHandles::make_local(env, (oop) result.get_jobject());
- JVM_END
-
-
// Returns the inherited_access_control_context field of the running thread.
JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
JVMWrapper("JVM_GetInheritedAccessControlContext");
oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
return JNIHandles::make_local(env, result);
--- 1163,1172 ----
*** 1347,1375 ****
// count the protection domains on the execution stack. We collapse
// duplicate consecutive protection domains into a single one, as
// well as stopping when we hit a privileged frame.
- // Use vframeStream to iterate through Java frames
- vframeStream vfst(thread);
-
oop previous_protection_domain = NULL;
Handle privileged_context(thread, NULL);
bool is_privileged = false;
oop protection_domain = NULL;
! for(; !vfst.at_end(); vfst.next()) {
// get method of frame
! Method* method = vfst.method();
! intptr_t* frame_id = vfst.frame_id();
! // check the privileged frames to see if we have a match
! if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
// this frame is privileged
is_privileged = true;
! privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
! protection_domain = thread->privileged_stack_top()->protection_domain();
} else {
protection_domain = method->method_holder()->protection_domain();
}
if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
--- 1197,1235 ----
// count the protection domains on the execution stack. We collapse
// duplicate consecutive protection domains into a single one, as
// well as stopping when we hit a privileged frame.
oop previous_protection_domain = NULL;
Handle privileged_context(thread, NULL);
bool is_privileged = false;
oop protection_domain = NULL;
! // Iterate through Java frames
! RegisterMap reg_map(thread);
! javaVFrame *vf = thread->last_java_vframe(®_map);
! for (; vf != NULL; vf = vf->java_sender()) {
// get method of frame
! Method* method = vf->method();
! // stop at the first privileged frame
! if (method->method_holder() == SystemDictionary::AccessController_klass() &&
! method->name() == vmSymbols::executePrivileged_name())
! {
// this frame is privileged
is_privileged = true;
!
! javaVFrame *priv = vf; // executePrivileged
! javaVFrame *caller_fr = priv->java_sender(); // doPrivileged
! caller_fr = caller_fr->java_sender(); // caller
!
! StackValueCollection* locals = priv->locals();
! privileged_context = locals->obj_at(1);
! Handle caller = locals->obj_at(2);
!
! Klass *caller_klass = java_lang_Class::as_Klass(caller());
! protection_domain = caller_klass->protection_domain();
} else {
protection_domain = method->method_holder()->protection_domain();
}
if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
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