Mercurial > hg > truffle
diff src/share/vm/prims/jvmtiManageCapabilities.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 8e7adf982378 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/jvmtiManageCapabilities.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,457 @@ +/* + * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ +# include "incls/_precompiled.incl" +# include "incls/_jvmtiManageCapabilities.cpp.incl" + +static const jint CAPA_SIZE = (JVMTI_INTERNAL_CAPABILITY_COUNT + 7) / 8; + + // capabilities which are always potentially available +jvmtiCapabilities JvmtiManageCapabilities::always_capabilities; + + // capabilities which are potentially available during OnLoad +jvmtiCapabilities JvmtiManageCapabilities::onload_capabilities; + + // capabilities which are always potentially available + // but to only one environment +jvmtiCapabilities JvmtiManageCapabilities::always_solo_capabilities; + + // capabilities which are potentially available during OnLoad + // but to only one environment +jvmtiCapabilities JvmtiManageCapabilities::onload_solo_capabilities; + + // remaining capabilities which are always potentially available + // but to only one environment +jvmtiCapabilities JvmtiManageCapabilities::always_solo_remaining_capabilities; + + // remaining capabilities which are potentially available during OnLoad + // but to only one environment +jvmtiCapabilities JvmtiManageCapabilities::onload_solo_remaining_capabilities; + + // all capabilities ever acquired +jvmtiCapabilities JvmtiManageCapabilities::acquired_capabilities; + +void JvmtiManageCapabilities::initialize() { + always_capabilities = init_always_capabilities(); + if (JvmtiEnv::get_phase() != JVMTI_PHASE_ONLOAD) { + recompute_always_capabilities(); + } + onload_capabilities = init_onload_capabilities(); + always_solo_capabilities = init_always_solo_capabilities(); + onload_solo_capabilities = init_onload_solo_capabilities(); + always_solo_remaining_capabilities = init_always_solo_capabilities(); + onload_solo_remaining_capabilities = init_onload_solo_capabilities(); + memset(&acquired_capabilities, 0, sizeof(acquired_capabilities)); +} + +// if the capability sets are initialized in the onload phase then +// it happens before class data sharing (CDS) is initialized. If it +// turns out that CDS gets disabled then we must adjust the always +// capabilities. To ensure a consistent view of the capabililties +// anything we add here should already be in the onload set. +void JvmtiManageCapabilities::recompute_always_capabilities() { + if (!UseSharedSpaces) { + jvmtiCapabilities jc = always_capabilities; + jc.can_generate_all_class_hook_events = 1; + always_capabilities = jc; + } +} + + +// corresponding init functions +jvmtiCapabilities JvmtiManageCapabilities::init_always_capabilities() { + jvmtiCapabilities jc; + + memset(&jc, 0, sizeof(jc)); + jc.can_get_bytecodes = 1; + jc.can_signal_thread = 1; + jc.can_get_source_file_name = 1; + jc.can_get_line_numbers = 1; + jc.can_get_synthetic_attribute = 1; + jc.can_get_monitor_info = 1; + jc.can_get_constant_pool = 1; + jc.can_generate_monitor_events = 1; + jc.can_generate_garbage_collection_events = 1; + jc.can_generate_compiled_method_load_events = 1; + jc.can_generate_native_method_bind_events = 1; + jc.can_generate_vm_object_alloc_events = 1; + if (os::is_thread_cpu_time_supported()) { + jc.can_get_current_thread_cpu_time = 1; + jc.can_get_thread_cpu_time = 1; + } + jc.can_redefine_classes = 1; + jc.can_redefine_any_class = 1; + jc.can_retransform_classes = 1; + jc.can_retransform_any_class = 1; + jc.can_set_native_method_prefix = 1; + jc.can_tag_objects = 1; + jc.can_generate_object_free_events = 1; + jc.can_generate_resource_exhaustion_heap_events = 1; + jc.can_generate_resource_exhaustion_threads_events = 1; + return jc; +} + +jvmtiCapabilities JvmtiManageCapabilities::init_onload_capabilities() { + jvmtiCapabilities jc; + + memset(&jc, 0, sizeof(jc)); + jc.can_pop_frame = 1; + jc.can_force_early_return = 1; + jc.can_get_source_debug_extension = 1; + jc.can_access_local_variables = 1; + jc.can_maintain_original_method_order = 1; + jc.can_generate_all_class_hook_events = 1; + jc.can_generate_single_step_events = 1; + jc.can_generate_exception_events = 1; + jc.can_generate_frame_pop_events = 1; + jc.can_generate_method_entry_events = 1; + jc.can_generate_method_exit_events = 1; + jc.can_get_owned_monitor_info = 1; + jc.can_get_owned_monitor_stack_depth_info = 1; + jc.can_get_current_contended_monitor = 1; + // jc.can_get_monitor_info = 1; + jc.can_tag_objects = 1; // TODO: this should have been removed + jc.can_generate_object_free_events = 1; // TODO: this should have been removed + return jc; +} + + +jvmtiCapabilities JvmtiManageCapabilities::init_always_solo_capabilities() { + jvmtiCapabilities jc; + + memset(&jc, 0, sizeof(jc)); + jc.can_suspend = 1; + return jc; +} + + +jvmtiCapabilities JvmtiManageCapabilities::init_onload_solo_capabilities() { + jvmtiCapabilities jc; + + memset(&jc, 0, sizeof(jc)); + jc.can_generate_field_modification_events = 1; + jc.can_generate_field_access_events = 1; + jc.can_generate_breakpoint_events = 1; + return jc; +} + + +jvmtiCapabilities *JvmtiManageCapabilities::either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, + jvmtiCapabilities *result) { + char *ap = (char *)a; + char *bp = (char *)b; + char *resultp = (char *)result; + + for (int i = 0; i < CAPA_SIZE; ++i) { + *resultp++ = *ap++ | *bp++; + } + + return result; +} + + +jvmtiCapabilities *JvmtiManageCapabilities::both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, + jvmtiCapabilities *result) { + char *ap = (char *)a; + char *bp = (char *)b; + char *resultp = (char *)result; + + for (int i = 0; i < CAPA_SIZE; ++i) { + *resultp++ = *ap++ & *bp++; + } + + return result; +} + + +jvmtiCapabilities *JvmtiManageCapabilities::exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, + jvmtiCapabilities *result) { + char *ap = (char *)a; + char *bp = (char *)b; + char *resultp = (char *)result; + + for (int i = 0; i < CAPA_SIZE; ++i) { + *resultp++ = *ap++ & ~*bp++; + } + + return result; +} + + +bool JvmtiManageCapabilities::has_some(const jvmtiCapabilities *a) { + char *ap = (char *)a; + + for (int i = 0; i < CAPA_SIZE; ++i) { + if (*ap++ != 0) { + return true; + } + } + + return false; +} + + +void JvmtiManageCapabilities::copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to) { + char *ap = (char *)from; + char *resultp = (char *)to; + + for (int i = 0; i < CAPA_SIZE; ++i) { + *resultp++ = *ap++; + } +} + + +void JvmtiManageCapabilities::get_potential_capabilities(const jvmtiCapabilities *current, + const jvmtiCapabilities *prohibited, + jvmtiCapabilities *result) { + // exclude prohibited capabilities, must be before adding current + exclude(&always_capabilities, prohibited, result); + + // must include current since it may possess solo capabilities and now prohibited + either(result, current, result); + + // add other remaining + either(result, &always_solo_remaining_capabilities, result); + + // if this is during OnLoad more capabilities are available + if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { + either(result, &onload_capabilities, result); + either(result, &onload_solo_remaining_capabilities, result); + } +} + +jvmtiError JvmtiManageCapabilities::add_capabilities(const jvmtiCapabilities *current, + const jvmtiCapabilities *prohibited, + const jvmtiCapabilities *desired, + jvmtiCapabilities *result) { + // check that the capabilities being added are potential capabilities + jvmtiCapabilities temp; + get_potential_capabilities(current, prohibited, &temp); + if (has_some(exclude(desired, &temp, &temp))) { + return JVMTI_ERROR_NOT_AVAILABLE; + } + + // add to the set of ever acquired capabilities + either(&acquired_capabilities, desired, &acquired_capabilities); + + // onload capabilities that got added are now permanent - so, also remove from onload + both(&onload_capabilities, desired, &temp); + either(&always_capabilities, &temp, &always_capabilities); + exclude(&onload_capabilities, &temp, &onload_capabilities); + + // same for solo capabilities (transferred capabilities in the remaining sets handled as part of standard grab - below) + both(&onload_solo_capabilities, desired, &temp); + either(&always_solo_capabilities, &temp, &always_solo_capabilities); + exclude(&onload_solo_capabilities, &temp, &onload_solo_capabilities); + + // remove solo capabilities that are now taken + exclude(&always_solo_remaining_capabilities, desired, &always_solo_remaining_capabilities); + exclude(&onload_solo_remaining_capabilities, desired, &onload_solo_remaining_capabilities); + + // return the result + either(current, desired, result); + + update(); + + return JVMTI_ERROR_NONE; +} + + +void JvmtiManageCapabilities::relinquish_capabilities(const jvmtiCapabilities *current, + const jvmtiCapabilities *unwanted, + jvmtiCapabilities *result) { + jvmtiCapabilities to_trash; + jvmtiCapabilities temp; + + // can't give up what you don't have + both(current, unwanted, &to_trash); + + // restore solo capabilities but only those that belong + either(&always_solo_remaining_capabilities, both(&always_solo_capabilities, &to_trash, &temp), + &always_solo_remaining_capabilities); + either(&onload_solo_remaining_capabilities, both(&onload_solo_capabilities, &to_trash, &temp), + &onload_solo_remaining_capabilities); + + update(); + + // return the result + exclude(current, unwanted, result); +} + + +void JvmtiManageCapabilities::update() { + jvmtiCapabilities avail; + + // all capabilities + either(&always_capabilities, &always_solo_capabilities, &avail); + + bool interp_events = + avail.can_generate_field_access_events || + avail.can_generate_field_modification_events || + avail.can_generate_single_step_events || + avail.can_generate_frame_pop_events || + avail.can_generate_method_entry_events || + avail.can_generate_method_exit_events; + bool enter_all_methods = + interp_events || + avail.can_generate_breakpoint_events; + UseFastEmptyMethods = !enter_all_methods; + UseFastAccessorMethods = !enter_all_methods; + + if (avail.can_generate_breakpoint_events) { + RewriteFrequentPairs = false; + } + + // If can_redefine_classes is enabled in the onload phase then we know that the + // dependency information recorded by the compiler is complete. + if ((avail.can_redefine_classes || avail.can_retransform_classes) && + JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { + JvmtiExport::set_all_dependencies_are_recorded(true); + } + + JvmtiExport::set_can_get_source_debug_extension(avail.can_get_source_debug_extension); + JvmtiExport::set_can_examine_or_deopt_anywhere( + avail.can_generate_breakpoint_events || + interp_events || + avail.can_redefine_classes || + avail.can_retransform_classes || + avail.can_access_local_variables || + avail.can_get_owned_monitor_info || + avail.can_get_current_contended_monitor || + avail.can_get_monitor_info || + avail.can_get_owned_monitor_stack_depth_info); + JvmtiExport::set_can_maintain_original_method_order(avail.can_maintain_original_method_order); + JvmtiExport::set_can_post_interpreter_events(interp_events); + JvmtiExport::set_can_hotswap_or_post_breakpoint( + avail.can_generate_breakpoint_events || + avail.can_redefine_classes || + avail.can_retransform_classes); + JvmtiExport::set_can_modify_any_class( + avail.can_generate_breakpoint_events || + avail.can_generate_all_class_hook_events); + JvmtiExport::set_can_walk_any_space( + avail.can_tag_objects); // disable sharing in onload phase + JvmtiExport::set_can_access_local_variables( + avail.can_access_local_variables || + avail.can_redefine_classes || + avail.can_retransform_classes); + JvmtiExport::set_can_post_exceptions( + avail.can_generate_exception_events || + avail.can_generate_frame_pop_events || + avail.can_generate_method_exit_events); + JvmtiExport::set_can_post_breakpoint(avail.can_generate_breakpoint_events); + JvmtiExport::set_can_post_field_access(avail.can_generate_field_access_events); + JvmtiExport::set_can_post_field_modification(avail.can_generate_field_modification_events); + JvmtiExport::set_can_post_method_entry(avail.can_generate_method_entry_events); + JvmtiExport::set_can_post_method_exit(avail.can_generate_method_exit_events || + avail.can_generate_frame_pop_events); + JvmtiExport::set_can_pop_frame(avail.can_pop_frame); + JvmtiExport::set_can_force_early_return(avail.can_force_early_return); + JvmtiExport::set_should_clean_up_heap_objects(avail.can_generate_breakpoint_events); +} + +#ifndef PRODUCT + +void JvmtiManageCapabilities:: print(const jvmtiCapabilities* cap) { + tty->print_cr("----- capabilities -----"); + if (cap->can_tag_objects) + tty->print_cr("can_tag_objects"); + if (cap->can_generate_field_modification_events) + tty->print_cr("can_generate_field_modification_events"); + if (cap->can_generate_field_access_events) + tty->print_cr("can_generate_field_access_events"); + if (cap->can_get_bytecodes) + tty->print_cr("can_get_bytecodes"); + if (cap->can_get_synthetic_attribute) + tty->print_cr("can_get_synthetic_attribute"); + if (cap->can_get_owned_monitor_info) + tty->print_cr("can_get_owned_monitor_info"); + if (cap->can_get_current_contended_monitor) + tty->print_cr("can_get_current_contended_monitor"); + if (cap->can_get_monitor_info) + tty->print_cr("can_get_monitor_info"); + if (cap->can_get_constant_pool) + tty->print_cr("can_get_constant_pool"); + if (cap->can_pop_frame) + tty->print_cr("can_pop_frame"); + if (cap->can_force_early_return) + tty->print_cr("can_force_early_return"); + if (cap->can_redefine_classes) + tty->print_cr("can_redefine_classes"); + if (cap->can_retransform_classes) + tty->print_cr("can_retransform_classes"); + if (cap->can_signal_thread) + tty->print_cr("can_signal_thread"); + if (cap->can_get_source_file_name) + tty->print_cr("can_get_source_file_name"); + if (cap->can_get_line_numbers) + tty->print_cr("can_get_line_numbers"); + if (cap->can_get_source_debug_extension) + tty->print_cr("can_get_source_debug_extension"); + if (cap->can_access_local_variables) + tty->print_cr("can_access_local_variables"); + if (cap->can_maintain_original_method_order) + tty->print_cr("can_maintain_original_method_order"); + if (cap->can_generate_single_step_events) + tty->print_cr("can_generate_single_step_events"); + if (cap->can_generate_exception_events) + tty->print_cr("can_generate_exception_events"); + if (cap->can_generate_frame_pop_events) + tty->print_cr("can_generate_frame_pop_events"); + if (cap->can_generate_breakpoint_events) + tty->print_cr("can_generate_breakpoint_events"); + if (cap->can_suspend) + tty->print_cr("can_suspend"); + if (cap->can_redefine_any_class ) + tty->print_cr("can_redefine_any_class"); + if (cap->can_retransform_any_class ) + tty->print_cr("can_retransform_any_class"); + if (cap->can_get_current_thread_cpu_time) + tty->print_cr("can_get_current_thread_cpu_time"); + if (cap->can_get_thread_cpu_time) + tty->print_cr("can_get_thread_cpu_time"); + if (cap->can_generate_method_entry_events) + tty->print_cr("can_generate_method_entry_events"); + if (cap->can_generate_method_exit_events) + tty->print_cr("can_generate_method_exit_events"); + if (cap->can_generate_all_class_hook_events) + tty->print_cr("can_generate_all_class_hook_events"); + if (cap->can_generate_compiled_method_load_events) + tty->print_cr("can_generate_compiled_method_load_events"); + if (cap->can_generate_monitor_events) + tty->print_cr("can_generate_monitor_events"); + if (cap->can_generate_vm_object_alloc_events) + tty->print_cr("can_generate_vm_object_alloc_events"); + if (cap->can_generate_native_method_bind_events) + tty->print_cr("can_generate_native_method_bind_events"); + if (cap->can_generate_garbage_collection_events) + tty->print_cr("can_generate_garbage_collection_events"); + if (cap->can_generate_object_free_events) + tty->print_cr("can_generate_object_free_events"); + if (cap->can_generate_resource_exhaustion_heap_events) + tty->print_cr("can_generate_resource_exhaustion_heap_events"); + if (cap->can_generate_resource_exhaustion_threads_events) + tty->print_cr("can_generate_resource_exhaustion_threads_events"); +} + +#endif