author | dcubed |
Mon, 01 Feb 2010 17:35:05 -0700 | |
changeset 4761 | bdb7375a1fee |
parent 4448 | d6ec2737186c |
child 5353 | 30f4b75f8005 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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bdb7375a1fee
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
4448
diff
changeset
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* Copyright 2003-2010 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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# include "incls/_precompiled.incl" |
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# include "incls/_jvmtiManageCapabilities.cpp.incl" |
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static const jint CAPA_SIZE = (JVMTI_INTERNAL_CAPABILITY_COUNT + 7) / 8; |
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// capabilities which are always potentially available |
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jvmtiCapabilities JvmtiManageCapabilities::always_capabilities; |
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// capabilities which are potentially available during OnLoad |
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jvmtiCapabilities JvmtiManageCapabilities::onload_capabilities; |
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// capabilities which are always potentially available |
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// but to only one environment |
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jvmtiCapabilities JvmtiManageCapabilities::always_solo_capabilities; |
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// capabilities which are potentially available during OnLoad |
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// but to only one environment |
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jvmtiCapabilities JvmtiManageCapabilities::onload_solo_capabilities; |
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// remaining capabilities which are always potentially available |
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// but to only one environment |
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jvmtiCapabilities JvmtiManageCapabilities::always_solo_remaining_capabilities; |
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// remaining capabilities which are potentially available during OnLoad |
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// but to only one environment |
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jvmtiCapabilities JvmtiManageCapabilities::onload_solo_remaining_capabilities; |
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// all capabilities ever acquired |
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jvmtiCapabilities JvmtiManageCapabilities::acquired_capabilities; |
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void JvmtiManageCapabilities::initialize() { |
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always_capabilities = init_always_capabilities(); |
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if (JvmtiEnv::get_phase() != JVMTI_PHASE_ONLOAD) { |
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recompute_always_capabilities(); |
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} |
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onload_capabilities = init_onload_capabilities(); |
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always_solo_capabilities = init_always_solo_capabilities(); |
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onload_solo_capabilities = init_onload_solo_capabilities(); |
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always_solo_remaining_capabilities = init_always_solo_capabilities(); |
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onload_solo_remaining_capabilities = init_onload_solo_capabilities(); |
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memset(&acquired_capabilities, 0, sizeof(acquired_capabilities)); |
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} |
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// if the capability sets are initialized in the onload phase then |
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// it happens before class data sharing (CDS) is initialized. If it |
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// turns out that CDS gets disabled then we must adjust the always |
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// capabilities. To ensure a consistent view of the capabililties |
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// anything we add here should already be in the onload set. |
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void JvmtiManageCapabilities::recompute_always_capabilities() { |
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if (!UseSharedSpaces) { |
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jvmtiCapabilities jc = always_capabilities; |
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jc.can_generate_all_class_hook_events = 1; |
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always_capabilities = jc; |
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} |
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} |
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// corresponding init functions |
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jvmtiCapabilities JvmtiManageCapabilities::init_always_capabilities() { |
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jvmtiCapabilities jc; |
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memset(&jc, 0, sizeof(jc)); |
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jc.can_get_bytecodes = 1; |
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jc.can_signal_thread = 1; |
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jc.can_get_source_file_name = 1; |
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jc.can_get_line_numbers = 1; |
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jc.can_get_synthetic_attribute = 1; |
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jc.can_get_monitor_info = 1; |
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jc.can_get_constant_pool = 1; |
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jc.can_generate_monitor_events = 1; |
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jc.can_generate_garbage_collection_events = 1; |
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jc.can_generate_compiled_method_load_events = 1; |
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jc.can_generate_native_method_bind_events = 1; |
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jc.can_generate_vm_object_alloc_events = 1; |
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if (os::is_thread_cpu_time_supported()) { |
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jc.can_get_current_thread_cpu_time = 1; |
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jc.can_get_thread_cpu_time = 1; |
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} |
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jc.can_redefine_classes = 1; |
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jc.can_redefine_any_class = 1; |
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jc.can_retransform_classes = 1; |
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jc.can_retransform_any_class = 1; |
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jc.can_set_native_method_prefix = 1; |
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jc.can_tag_objects = 1; |
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jc.can_generate_object_free_events = 1; |
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jc.can_generate_resource_exhaustion_heap_events = 1; |
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jc.can_generate_resource_exhaustion_threads_events = 1; |
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return jc; |
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} |
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jvmtiCapabilities JvmtiManageCapabilities::init_onload_capabilities() { |
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jvmtiCapabilities jc; |
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memset(&jc, 0, sizeof(jc)); |
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#ifndef CC_INTERP |
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jc.can_pop_frame = 1; |
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jc.can_force_early_return = 1; |
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#endif // !CC_INTERP |
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jc.can_get_source_debug_extension = 1; |
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jc.can_access_local_variables = 1; |
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jc.can_maintain_original_method_order = 1; |
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jc.can_generate_all_class_hook_events = 1; |
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jc.can_generate_single_step_events = 1; |
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jc.can_generate_exception_events = 1; |
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jc.can_generate_frame_pop_events = 1; |
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jc.can_generate_method_entry_events = 1; |
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jc.can_generate_method_exit_events = 1; |
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jc.can_get_owned_monitor_info = 1; |
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jc.can_get_owned_monitor_stack_depth_info = 1; |
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jc.can_get_current_contended_monitor = 1; |
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// jc.can_get_monitor_info = 1; |
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jc.can_tag_objects = 1; // TODO: this should have been removed |
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jc.can_generate_object_free_events = 1; // TODO: this should have been removed |
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return jc; |
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} |
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jvmtiCapabilities JvmtiManageCapabilities::init_always_solo_capabilities() { |
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jvmtiCapabilities jc; |
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memset(&jc, 0, sizeof(jc)); |
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jc.can_suspend = 1; |
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return jc; |
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} |
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jvmtiCapabilities JvmtiManageCapabilities::init_onload_solo_capabilities() { |
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jvmtiCapabilities jc; |
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memset(&jc, 0, sizeof(jc)); |
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jc.can_generate_field_modification_events = 1; |
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jc.can_generate_field_access_events = 1; |
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jc.can_generate_breakpoint_events = 1; |
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return jc; |
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} |
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jvmtiCapabilities *JvmtiManageCapabilities::either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, |
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jvmtiCapabilities *result) { |
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char *ap = (char *)a; |
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char *bp = (char *)b; |
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char *resultp = (char *)result; |
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for (int i = 0; i < CAPA_SIZE; ++i) { |
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*resultp++ = *ap++ | *bp++; |
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} |
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return result; |
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} |
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jvmtiCapabilities *JvmtiManageCapabilities::both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, |
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jvmtiCapabilities *result) { |
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char *ap = (char *)a; |
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char *bp = (char *)b; |
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char *resultp = (char *)result; |
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for (int i = 0; i < CAPA_SIZE; ++i) { |
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*resultp++ = *ap++ & *bp++; |
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} |
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return result; |
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} |
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jvmtiCapabilities *JvmtiManageCapabilities::exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, |
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jvmtiCapabilities *result) { |
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char *ap = (char *)a; |
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char *bp = (char *)b; |
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char *resultp = (char *)result; |
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for (int i = 0; i < CAPA_SIZE; ++i) { |
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*resultp++ = *ap++ & ~*bp++; |
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} |
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return result; |
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} |
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bool JvmtiManageCapabilities::has_some(const jvmtiCapabilities *a) { |
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char *ap = (char *)a; |
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for (int i = 0; i < CAPA_SIZE; ++i) { |
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if (*ap++ != 0) { |
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return true; |
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} |
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} |
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return false; |
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} |
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void JvmtiManageCapabilities::copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to) { |
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char *ap = (char *)from; |
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char *resultp = (char *)to; |
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for (int i = 0; i < CAPA_SIZE; ++i) { |
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*resultp++ = *ap++; |
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} |
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} |
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void JvmtiManageCapabilities::get_potential_capabilities(const jvmtiCapabilities *current, |
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const jvmtiCapabilities *prohibited, |
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jvmtiCapabilities *result) { |
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// exclude prohibited capabilities, must be before adding current |
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exclude(&always_capabilities, prohibited, result); |
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// must include current since it may possess solo capabilities and now prohibited |
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either(result, current, result); |
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// add other remaining |
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either(result, &always_solo_remaining_capabilities, result); |
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// if this is during OnLoad more capabilities are available |
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if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { |
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either(result, &onload_capabilities, result); |
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either(result, &onload_solo_remaining_capabilities, result); |
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} |
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} |
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jvmtiError JvmtiManageCapabilities::add_capabilities(const jvmtiCapabilities *current, |
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const jvmtiCapabilities *prohibited, |
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const jvmtiCapabilities *desired, |
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jvmtiCapabilities *result) { |
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// check that the capabilities being added are potential capabilities |
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jvmtiCapabilities temp; |
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get_potential_capabilities(current, prohibited, &temp); |
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if (has_some(exclude(desired, &temp, &temp))) { |
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return JVMTI_ERROR_NOT_AVAILABLE; |
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} |
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// add to the set of ever acquired capabilities |
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either(&acquired_capabilities, desired, &acquired_capabilities); |
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// onload capabilities that got added are now permanent - so, also remove from onload |
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both(&onload_capabilities, desired, &temp); |
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either(&always_capabilities, &temp, &always_capabilities); |
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exclude(&onload_capabilities, &temp, &onload_capabilities); |
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// same for solo capabilities (transferred capabilities in the remaining sets handled as part of standard grab - below) |
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both(&onload_solo_capabilities, desired, &temp); |
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either(&always_solo_capabilities, &temp, &always_solo_capabilities); |
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exclude(&onload_solo_capabilities, &temp, &onload_solo_capabilities); |
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// remove solo capabilities that are now taken |
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exclude(&always_solo_remaining_capabilities, desired, &always_solo_remaining_capabilities); |
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exclude(&onload_solo_remaining_capabilities, desired, &onload_solo_remaining_capabilities); |
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// return the result |
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either(current, desired, result); |
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update(); |
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return JVMTI_ERROR_NONE; |
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} |
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void JvmtiManageCapabilities::relinquish_capabilities(const jvmtiCapabilities *current, |
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const jvmtiCapabilities *unwanted, |
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jvmtiCapabilities *result) { |
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jvmtiCapabilities to_trash; |
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jvmtiCapabilities temp; |
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// can't give up what you don't have |
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both(current, unwanted, &to_trash); |
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// restore solo capabilities but only those that belong |
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either(&always_solo_remaining_capabilities, both(&always_solo_capabilities, &to_trash, &temp), |
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&always_solo_remaining_capabilities); |
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either(&onload_solo_remaining_capabilities, both(&onload_solo_capabilities, &to_trash, &temp), |
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&onload_solo_remaining_capabilities); |
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update(); |
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// return the result |
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exclude(current, unwanted, result); |
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} |
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void JvmtiManageCapabilities::update() { |
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jvmtiCapabilities avail; |
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// all capabilities |
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either(&always_capabilities, &always_solo_capabilities, &avail); |
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bool interp_events = |
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avail.can_generate_field_access_events || |
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avail.can_generate_field_modification_events || |
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avail.can_generate_single_step_events || |
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avail.can_generate_frame_pop_events || |
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avail.can_generate_method_entry_events || |
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avail.can_generate_method_exit_events; |
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bool enter_all_methods = |
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interp_events || |
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avail.can_generate_breakpoint_events; |
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UseFastEmptyMethods = !enter_all_methods; |
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UseFastAccessorMethods = !enter_all_methods; |
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322 |
||
323 |
if (avail.can_generate_breakpoint_events) { |
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RewriteFrequentPairs = false; |
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} |
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// If can_redefine_classes is enabled in the onload phase then we know that the |
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// dependency information recorded by the compiler is complete. |
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if ((avail.can_redefine_classes || avail.can_retransform_classes) && |
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JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { |
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JvmtiExport::set_all_dependencies_are_recorded(true); |
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} |
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JvmtiExport::set_can_get_source_debug_extension(avail.can_get_source_debug_extension); |
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JvmtiExport::set_can_examine_or_deopt_anywhere( |
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avail.can_generate_breakpoint_events || |
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interp_events || |
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avail.can_redefine_classes || |
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avail.can_retransform_classes || |
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avail.can_access_local_variables || |
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avail.can_get_owned_monitor_info || |
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avail.can_get_current_contended_monitor || |
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avail.can_get_monitor_info || |
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avail.can_get_owned_monitor_stack_depth_info); |
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JvmtiExport::set_can_maintain_original_method_order(avail.can_maintain_original_method_order); |
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346 |
JvmtiExport::set_can_post_interpreter_events(interp_events); |
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347 |
JvmtiExport::set_can_hotswap_or_post_breakpoint( |
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348 |
avail.can_generate_breakpoint_events || |
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349 |
avail.can_redefine_classes || |
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350 |
avail.can_retransform_classes); |
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351 |
JvmtiExport::set_can_modify_any_class( |
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352 |
avail.can_generate_breakpoint_events || |
|
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avail.can_generate_all_class_hook_events); |
|
354 |
JvmtiExport::set_can_walk_any_space( |
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355 |
avail.can_tag_objects); // disable sharing in onload phase |
|
356 |
JvmtiExport::set_can_access_local_variables( |
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357 |
avail.can_access_local_variables || |
|
358 |
avail.can_redefine_classes || |
|
359 |
avail.can_retransform_classes); |
|
4761
bdb7375a1fee
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
4448
diff
changeset
|
360 |
JvmtiExport::set_can_post_on_exceptions( |
1 | 361 |
avail.can_generate_exception_events || |
362 |
avail.can_generate_frame_pop_events || |
|
363 |
avail.can_generate_method_exit_events); |
|
364 |
JvmtiExport::set_can_post_breakpoint(avail.can_generate_breakpoint_events); |
|
365 |
JvmtiExport::set_can_post_field_access(avail.can_generate_field_access_events); |
|
366 |
JvmtiExport::set_can_post_field_modification(avail.can_generate_field_modification_events); |
|
367 |
JvmtiExport::set_can_post_method_entry(avail.can_generate_method_entry_events); |
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368 |
JvmtiExport::set_can_post_method_exit(avail.can_generate_method_exit_events || |
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369 |
avail.can_generate_frame_pop_events); |
|
370 |
JvmtiExport::set_can_pop_frame(avail.can_pop_frame); |
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371 |
JvmtiExport::set_can_force_early_return(avail.can_force_early_return); |
|
372 |
JvmtiExport::set_should_clean_up_heap_objects(avail.can_generate_breakpoint_events); |
|
373 |
} |
|
374 |
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375 |
#ifndef PRODUCT |
|
376 |
||
377 |
void JvmtiManageCapabilities:: print(const jvmtiCapabilities* cap) { |
|
378 |
tty->print_cr("----- capabilities -----"); |
|
379 |
if (cap->can_tag_objects) |
|
380 |
tty->print_cr("can_tag_objects"); |
|
381 |
if (cap->can_generate_field_modification_events) |
|
382 |
tty->print_cr("can_generate_field_modification_events"); |
|
383 |
if (cap->can_generate_field_access_events) |
|
384 |
tty->print_cr("can_generate_field_access_events"); |
|
385 |
if (cap->can_get_bytecodes) |
|
386 |
tty->print_cr("can_get_bytecodes"); |
|
387 |
if (cap->can_get_synthetic_attribute) |
|
388 |
tty->print_cr("can_get_synthetic_attribute"); |
|
389 |
if (cap->can_get_owned_monitor_info) |
|
390 |
tty->print_cr("can_get_owned_monitor_info"); |
|
391 |
if (cap->can_get_current_contended_monitor) |
|
392 |
tty->print_cr("can_get_current_contended_monitor"); |
|
393 |
if (cap->can_get_monitor_info) |
|
394 |
tty->print_cr("can_get_monitor_info"); |
|
395 |
if (cap->can_get_constant_pool) |
|
396 |
tty->print_cr("can_get_constant_pool"); |
|
397 |
if (cap->can_pop_frame) |
|
398 |
tty->print_cr("can_pop_frame"); |
|
399 |
if (cap->can_force_early_return) |
|
400 |
tty->print_cr("can_force_early_return"); |
|
401 |
if (cap->can_redefine_classes) |
|
402 |
tty->print_cr("can_redefine_classes"); |
|
403 |
if (cap->can_retransform_classes) |
|
404 |
tty->print_cr("can_retransform_classes"); |
|
405 |
if (cap->can_signal_thread) |
|
406 |
tty->print_cr("can_signal_thread"); |
|
407 |
if (cap->can_get_source_file_name) |
|
408 |
tty->print_cr("can_get_source_file_name"); |
|
409 |
if (cap->can_get_line_numbers) |
|
410 |
tty->print_cr("can_get_line_numbers"); |
|
411 |
if (cap->can_get_source_debug_extension) |
|
412 |
tty->print_cr("can_get_source_debug_extension"); |
|
413 |
if (cap->can_access_local_variables) |
|
414 |
tty->print_cr("can_access_local_variables"); |
|
415 |
if (cap->can_maintain_original_method_order) |
|
416 |
tty->print_cr("can_maintain_original_method_order"); |
|
417 |
if (cap->can_generate_single_step_events) |
|
418 |
tty->print_cr("can_generate_single_step_events"); |
|
419 |
if (cap->can_generate_exception_events) |
|
420 |
tty->print_cr("can_generate_exception_events"); |
|
421 |
if (cap->can_generate_frame_pop_events) |
|
422 |
tty->print_cr("can_generate_frame_pop_events"); |
|
423 |
if (cap->can_generate_breakpoint_events) |
|
424 |
tty->print_cr("can_generate_breakpoint_events"); |
|
425 |
if (cap->can_suspend) |
|
426 |
tty->print_cr("can_suspend"); |
|
427 |
if (cap->can_redefine_any_class ) |
|
428 |
tty->print_cr("can_redefine_any_class"); |
|
429 |
if (cap->can_retransform_any_class ) |
|
430 |
tty->print_cr("can_retransform_any_class"); |
|
431 |
if (cap->can_get_current_thread_cpu_time) |
|
432 |
tty->print_cr("can_get_current_thread_cpu_time"); |
|
433 |
if (cap->can_get_thread_cpu_time) |
|
434 |
tty->print_cr("can_get_thread_cpu_time"); |
|
435 |
if (cap->can_generate_method_entry_events) |
|
436 |
tty->print_cr("can_generate_method_entry_events"); |
|
437 |
if (cap->can_generate_method_exit_events) |
|
438 |
tty->print_cr("can_generate_method_exit_events"); |
|
439 |
if (cap->can_generate_all_class_hook_events) |
|
440 |
tty->print_cr("can_generate_all_class_hook_events"); |
|
441 |
if (cap->can_generate_compiled_method_load_events) |
|
442 |
tty->print_cr("can_generate_compiled_method_load_events"); |
|
443 |
if (cap->can_generate_monitor_events) |
|
444 |
tty->print_cr("can_generate_monitor_events"); |
|
445 |
if (cap->can_generate_vm_object_alloc_events) |
|
446 |
tty->print_cr("can_generate_vm_object_alloc_events"); |
|
447 |
if (cap->can_generate_native_method_bind_events) |
|
448 |
tty->print_cr("can_generate_native_method_bind_events"); |
|
449 |
if (cap->can_generate_garbage_collection_events) |
|
450 |
tty->print_cr("can_generate_garbage_collection_events"); |
|
451 |
if (cap->can_generate_object_free_events) |
|
452 |
tty->print_cr("can_generate_object_free_events"); |
|
453 |
if (cap->can_generate_resource_exhaustion_heap_events) |
|
454 |
tty->print_cr("can_generate_resource_exhaustion_heap_events"); |
|
455 |
if (cap->can_generate_resource_exhaustion_threads_events) |
|
456 |
tty->print_cr("can_generate_resource_exhaustion_threads_events"); |
|
457 |
} |
|
458 |
||
459 |
#endif |