Mercurial > hg > truffle
view src/os/bsd/dtrace/jhelper.d @ 21408:32ca2353accf
Truffle/Instrumentation: fix NPE hazard
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Sun, 17 May 2015 20:47:04 -0700 |
parents | 8e47bac5643a |
children |
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/* * Copyright (c) 2003, 2012, 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. * */ /* This file is auto-generated */ #include "JvmOffsetsIndex.h" #define DEBUG #ifdef DEBUG #define MARK_LINE this->line = __LINE__ #else #define MARK_LINE #endif #ifdef _LP64 #define STACK_BIAS 0x7ff #define pointer uint64_t #else #define STACK_BIAS 0 #define pointer uint32_t #endif extern pointer __JvmOffsets; extern pointer __1cJCodeCacheF_heap_; extern pointer __1cIUniverseO_collectedHeap_; extern pointer __1cHnmethodG__vtbl_; extern pointer __1cNMethodG__vtbl_; extern pointer __1cKBufferBlobG__vtbl_; #define copyin_ptr(ADDR) *(pointer*) copyin((pointer) (ADDR), sizeof(pointer)) #define copyin_uchar(ADDR) *(uchar_t*) copyin((pointer) (ADDR), sizeof(uchar_t)) #define copyin_uint16(ADDR) *(uint16_t*) copyin((pointer) (ADDR), sizeof(uint16_t)) #define copyin_uint32(ADDR) *(uint32_t*) copyin((pointer) (ADDR), sizeof(uint32_t)) #define copyin_int32(ADDR) *(int32_t*) copyin((pointer) (ADDR), sizeof(int32_t)) #define copyin_uint8(ADDR) *(uint8_t*) copyin((pointer) (ADDR), sizeof(uint8_t)) #define SAME(x) x #define copyin_offset(JVM_CONST) JVM_CONST = \ copyin_int32(JvmOffsetsPtr + SAME(IDX_)JVM_CONST * sizeof(int32_t)) int init_done; dtrace:helper:ustack: { MARK_LINE; this->done = 0; /* * TBD: * Here we initialize init_done, otherwise jhelper does not work. * Therefore, copyin_offset() statements work multiple times now. * There is a hope we could avoid it in the future, and so, * this initialization can be removed. */ init_done = 0; this->error = (char *) NULL; this->result = (char *) NULL; this->isMethod = 0; this->codecache = 0; this->klass = (pointer) NULL; this->vtbl = (pointer) NULL; this->suffix = '\0'; } dtrace:helper:ustack: { MARK_LINE; /* Initialization of JvmOffsets constants */ JvmOffsetsPtr = (pointer) &``__JvmOffsets; } dtrace:helper:ustack: /!init_done && !this->done/ { MARK_LINE; init_done = 1; copyin_offset(COMPILER); copyin_offset(OFFSET_CollectedHeap_reserved); copyin_offset(OFFSET_MemRegion_start); copyin_offset(OFFSET_MemRegion_word_size); copyin_offset(SIZE_HeapWord); copyin_offset(OFFSET_interpreter_frame_method); copyin_offset(OFFSET_Klass_name); copyin_offset(OFFSET_ConstantPool_pool_holder); copyin_offset(OFFSET_HeapBlockHeader_used); copyin_offset(OFFSET_oopDesc_metadata); copyin_offset(OFFSET_Symbol_length); copyin_offset(OFFSET_Symbol_body); copyin_offset(OFFSET_Method_constMethod); copyin_offset(OFFSET_ConstMethod_constants); copyin_offset(OFFSET_ConstMethod_name_index); copyin_offset(OFFSET_ConstMethod_signature_index); copyin_offset(OFFSET_CodeHeap_memory); copyin_offset(OFFSET_CodeHeap_segmap); copyin_offset(OFFSET_CodeHeap_log2_segment_size); copyin_offset(OFFSET_VirtualSpace_low); copyin_offset(OFFSET_VirtualSpace_high); copyin_offset(OFFSET_CodeBlob_name); copyin_offset(OFFSET_nmethod_method); copyin_offset(SIZE_HeapBlockHeader); copyin_offset(SIZE_oopDesc); copyin_offset(SIZE_ConstantPool); copyin_offset(OFFSET_NarrowPtrStruct_base); copyin_offset(OFFSET_NarrowPtrStruct_shift); /* * The PC to translate is in arg0. */ this->pc = arg0; /* * The methodPtr is in %l2 on SPARC. This can be found at * offset 8 from the frame pointer on 32-bit processes. */ #if defined(__sparc) this->methodPtr = copyin_ptr(arg1 + 2 * sizeof(pointer) + STACK_BIAS); #elif defined(__i386) || defined(__amd64) this->methodPtr = copyin_ptr(arg1 + OFFSET_interpreter_frame_method); #else #error "Don't know architecture" #endif this->CodeCache_heap_address = copyin_ptr(&``__1cJCodeCacheF_heap_); /* Reading volatile values */ this->CodeCache_low = copyin_ptr(this->CodeCache_heap_address + OFFSET_CodeHeap_memory + OFFSET_VirtualSpace_low); this->CodeCache_high = copyin_ptr(this->CodeCache_heap_address + OFFSET_CodeHeap_memory + OFFSET_VirtualSpace_high); this->CodeCache_segmap_low = copyin_ptr(this->CodeCache_heap_address + OFFSET_CodeHeap_segmap + OFFSET_VirtualSpace_low); this->CodeCache_segmap_high = copyin_ptr(this->CodeCache_heap_address + OFFSET_CodeHeap_segmap + OFFSET_VirtualSpace_high); this->CodeHeap_log2_segment_size = copyin_uint32( this->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size); this->Method_vtbl = (pointer) &``__1cNMethodG__vtbl_; /* * Get Java heap bounds */ this->Universe_collectedHeap = copyin_ptr(&``__1cIUniverseO_collectedHeap_); this->heap_start = copyin_ptr(this->Universe_collectedHeap + OFFSET_CollectedHeap_reserved + OFFSET_MemRegion_start); this->heap_size = SIZE_HeapWord * copyin_ptr(this->Universe_collectedHeap + OFFSET_CollectedHeap_reserved + OFFSET_MemRegion_word_size ); this->heap_end = this->heap_start + this->heap_size; } dtrace:helper:ustack: /!this->done && this->CodeCache_low <= this->pc && this->pc < this->CodeCache_high/ { MARK_LINE; this->codecache = 1; /* * Find start. */ this->segment = (this->pc - this->CodeCache_low) >> this->CodeHeap_log2_segment_size; this->block = this->CodeCache_segmap_low; this->tag = copyin_uchar(this->block + this->segment); "second"; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->tag = copyin_uchar(this->block + this->segment); this->segment = this->segment - this->tag; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->tag = copyin_uchar(this->block + this->segment); this->segment = this->segment - this->tag; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->tag = copyin_uchar(this->block + this->segment); this->segment = this->segment - this->tag; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->tag = copyin_uchar(this->block + this->segment); this->segment = this->segment - this->tag; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->tag = copyin_uchar(this->block + this->segment); this->segment = this->segment - this->tag; } dtrace:helper:ustack: /!this->done && this->codecache && this->tag > 0/ { MARK_LINE; this->error = "<couldn't find start>"; this->done = 1; } dtrace:helper:ustack: /!this->done && this->codecache/ { MARK_LINE; this->block = this->CodeCache_low + (this->segment << this->CodeHeap_log2_segment_size); this->used = copyin_uint32(this->block + OFFSET_HeapBlockHeader_used); } dtrace:helper:ustack: /!this->done && this->codecache && !this->used/ { MARK_LINE; this->error = "<block not in use>"; this->done = 1; } dtrace:helper:ustack: /!this->done && this->codecache/ { MARK_LINE; this->start = this->block + SIZE_HeapBlockHeader; this->vtbl = copyin_ptr(this->start); this->nmethod_vtbl = (pointer) &``__1cHnmethodG__vtbl_; this->BufferBlob_vtbl = (pointer) &``__1cKBufferBlobG__vtbl_; } dtrace:helper:ustack: /!this->done && this->vtbl == this->nmethod_vtbl/ { MARK_LINE; this->methodPtr = copyin_ptr(this->start + OFFSET_nmethod_method); this->suffix = '*'; this->isMethod = 1; } dtrace:helper:ustack: /!this->done && this->vtbl == this->BufferBlob_vtbl/ { MARK_LINE; this->name = copyin_ptr(this->start + OFFSET_CodeBlob_name); } dtrace:helper:ustack: /!this->done && this->vtbl == this->BufferBlob_vtbl && this->methodPtr != 0/ { MARK_LINE; this->klass = copyin_ptr(this->methodPtr); this->isMethod = this->klass == this->Method_vtbl; this->done = !this->isMethod; } dtrace:helper:ustack: /!this->done && !this->isMethod/ { MARK_LINE; this->name = copyin_ptr(this->start + OFFSET_CodeBlob_name); this->result = this->name != 0 ? copyinstr(this->name) : "<CodeBlob>"; this->done = 1; } dtrace:helper:ustack: /!this->done && this->isMethod/ { MARK_LINE; this->constMethod = copyin_ptr(this->methodPtr + OFFSET_Method_constMethod); this->nameIndex = copyin_uint16(this->constMethod + OFFSET_ConstMethod_name_index); this->signatureIndex = copyin_uint16(this->constMethod + OFFSET_ConstMethod_signature_index); this->constantPool = copyin_ptr(this->constMethod + OFFSET_ConstMethod_constants); this->nameSymbol = copyin_ptr(this->constantPool + this->nameIndex * sizeof (pointer) + SIZE_ConstantPool); this->nameSymbolLength = copyin_uint16(this->nameSymbol + OFFSET_Symbol_length); this->signatureSymbol = copyin_ptr(this->constantPool + this->signatureIndex * sizeof (pointer) + SIZE_ConstantPool); this->signatureSymbolLength = copyin_uint16(this->signatureSymbol + OFFSET_Symbol_length); this->klassPtr = copyin_ptr(this->constantPool + OFFSET_ConstantPool_pool_holder); this->klassSymbol = copyin_ptr(this->klassPtr + OFFSET_Klass_name); this->klassSymbolLength = copyin_uint16(this->klassSymbol + OFFSET_Symbol_length); /* * Enough for three strings, plus the '.', plus the trailing '\0'. */ this->result = (char *) alloca(this->klassSymbolLength + this->nameSymbolLength + this->signatureSymbolLength + 2 + 1); copyinto(this->klassSymbol + OFFSET_Symbol_body, this->klassSymbolLength, this->result); /* * Add the '.' between the class and the name. */ this->result[this->klassSymbolLength] = '.'; copyinto(this->nameSymbol + OFFSET_Symbol_body, this->nameSymbolLength, this->result + this->klassSymbolLength + 1); copyinto(this->signatureSymbol + OFFSET_Symbol_body, this->signatureSymbolLength, this->result + this->klassSymbolLength + this->nameSymbolLength + 1); /* * Now we need to add a trailing '\0' and possibly a tag character. */ this->result[this->klassSymbolLength + 1 + this->nameSymbolLength + this->signatureSymbolLength] = this->suffix; this->result[this->klassSymbolLength + 2 + this->nameSymbolLength + this->signatureSymbolLength] = '\0'; this->done = 1; } dtrace:helper:ustack: /this->done && this->error == (char *) NULL/ { this->result; } dtrace:helper:ustack: /this->done && this->error != (char *) NULL/ { this->error; } dtrace:helper:ustack: /!this->done && this->codecache/ { this->done = 1; "error"; } dtrace:helper:ustack: /!this->done/ { NULL; }