Mercurial > hg > truffle
view src/share/vm/prims/jvmtiManageCapabilities.cpp @ 5502:13aee5aba8cc
Moved RiConstant to cri.ri package.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 07 Jun 2012 17:07:42 +0200 |
parents | c2323e2ea62b |
children | abe03600372a |
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/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "jvmtifiles/jvmtiEnv.hpp" #include "prims/jvmtiExport.hpp" #include "prims/jvmtiManageCapabilities.hpp" 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)); #ifndef CC_INTERP jc.can_pop_frame = 1; jc.can_force_early_return = 1; #endif // !CC_INTERP 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; if (enter_all_methods) { // Disable these when tracking the bytecodes UseFastEmptyMethods = false; UseFastAccessorMethods = false; } 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_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 // This controls whether the compilers keep extra locals live to // improve the debugging experience so only set them if the selected // capabilities look like a debugger. JvmtiExport::set_can_access_local_variables( avail.can_access_local_variables || avail.can_generate_breakpoint_events || avail.can_generate_frame_pop_events); JvmtiExport::set_can_post_on_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