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10739
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/*
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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// not available on macosx #include <gelf.h>
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#include "libjvm_db.h"
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#include "JvmOffsets.h"
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#define LIBJVM_SO "libjvm.so"
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#if defined(i386) || defined(__i386) || defined(__amd64)
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#ifdef COMPILER2
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#define X86_COMPILER2
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#endif /* COMPILER2 */
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#endif /* i386 */
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typedef struct {
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short vf_cnt; /* number of recognized java vframes */
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short bci; /* current frame method byte code index */
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int line; /* current frame method source line */
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uint64_t new_fp; /* fp for the next frame */
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uint64_t new_pc; /* pc for the next frame */
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uint64_t new_sp; /* "raw" sp for the next frame (includes extension by interpreter/adapter */
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char locinf; /* indicates there is valid location info */
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} Jframe_t;
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int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name,
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size_t size, Jframe_t *jframe);
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int main(int arg) { return arg; }
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static int debug = 0;
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static void failed(int err, const char * file, int line) {
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if (debug) {
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fprintf(stderr, "failed %d at %s:%d\n", err, file, line);
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}
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}
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static void warn(const char * file, int line, const char * msg) {
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if (debug) {
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fprintf(stderr, "warning: %s at %s:%d\n", msg, file, line);
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}
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}
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static void warn1(const char * file, int line, const char * msg, intptr_t arg1) {
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if (debug) {
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fprintf(stderr, "warning: ");
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fprintf(stderr, msg, arg1);
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fprintf(stderr, " at %s:%d\n", file, line);
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}
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}
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#define CHECK_FAIL(err) \
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if (err != PS_OK) { failed(err, __FILE__, __LINE__); goto fail; }
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#define WARN(msg) warn(__FILE__, __LINE__, msg)
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#define WARN1(msg, arg1) warn1(__FILE__, __LINE__, msg, arg1)
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typedef struct VMStructEntry {
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const char * typeName; /* The type name containing the given field (example: "Klass") */
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const char * fieldName; /* The field name within the type (example: "_name") */
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uint64_t address; /* Address of field; only used for static fields */
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/* ("offset" can not be reused because of apparent SparcWorks compiler bug */
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/* in generation of initializer data) */
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} VMStructEntry;
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/* Prototyping inlined methods */
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int sprintf(char *s, const char *format, ...);
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#define SZ16 sizeof(int16_t)
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#define SZ32 sizeof(int32_t)
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#define COMP_METHOD_SIGN '*'
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#define MAX_VFRAMES_CNT 256
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typedef struct vframe {
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uint64_t methodOop;
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int32_t sender_decode_offset;
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int32_t methodIdx;
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int32_t bci;
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int32_t line;
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} Vframe_t;
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typedef struct frame {
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uintptr_t fp;
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uintptr_t pc;
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uintptr_t sp;
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uintptr_t sender_sp; // The unextended sp of the caller
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} Frame_t;
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typedef struct Nmethod_t {
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struct jvm_agent* J;
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Jframe_t *jframe;
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uint64_t nm; /* _nmethod */
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uint64_t pc;
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uint64_t pc_desc;
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int32_t orig_pc_offset; /* _orig_pc_offset */
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int32_t instrs_beg; /* _code_offset */
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int32_t instrs_end;
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int32_t deopt_beg; /* _deoptimize_offset */
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int32_t scopes_data_beg; /* _scopes_data_offset */
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int32_t scopes_data_end;
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int32_t oops_beg; /* _oops_offset */
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int32_t oops_end;
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int32_t scopes_pcs_beg; /* _scopes_pcs_offset */
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int32_t scopes_pcs_end;
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int vf_cnt;
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Vframe_t vframes[MAX_VFRAMES_CNT];
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} Nmethod_t;
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struct jvm_agent {
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struct ps_prochandle* P;
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uint64_t nmethod_vtbl;
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uint64_t CodeBlob_vtbl;
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uint64_t BufferBlob_vtbl;
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uint64_t RuntimeStub_vtbl;
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uint64_t Use_Compressed_Oops_address;
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uint64_t Universe_methodKlassObj_address;
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uint64_t Universe_narrow_oop_base_address;
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uint64_t Universe_narrow_oop_shift_address;
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uint64_t CodeCache_heap_address;
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/* Volatiles */
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uint8_t Use_Compressed_Oops;
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uint64_t Universe_methodKlassObj;
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uint64_t Universe_narrow_oop_base;
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uint32_t Universe_narrow_oop_shift;
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uint64_t CodeCache_low;
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uint64_t CodeCache_high;
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uint64_t CodeCache_segmap_low;
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uint64_t CodeCache_segmap_high;
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int32_t SIZE_CodeCache_log2_segment;
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uint64_t methodOopPtr;
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uint64_t bcx;
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Nmethod_t *N; /*Inlined methods support */
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Frame_t prev_fr;
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Frame_t curr_fr;
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};
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static int
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read_string(struct ps_prochandle *P,
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char *buf, /* caller's buffer */
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size_t size, /* upper limit on bytes to read */
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uintptr_t addr) /* address in process */
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{
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int err = PS_OK;
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while (size-- > 1 && err == PS_OK) {
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err = ps_pread(P, addr, buf, 1);
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if (*buf == '\0') {
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return PS_OK;
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}
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addr += 1;
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buf += 1;
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}
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return -1;
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}
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static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) {
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int err = -1;
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uint32_t ptr32;
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err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t));
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*ptr = ptr32;
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return err;
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}
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static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) {
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int err = -1;
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uint32_t ptr32;
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switch (DATA_MODEL) {
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case PR_MODEL_LP64:
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err = ps_pread(J->P, base, ptr, sizeof(uint64_t));
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break;
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case PR_MODEL_ILP32:
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err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t));
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*ptr = ptr32;
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break;
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}
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return err;
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}
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static int read_string_pointer(jvm_agent_t* J, uint64_t base, const char ** stringp) {
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uint64_t ptr;
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int err;
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char buffer[1024];
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*stringp = NULL;
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err = read_pointer(J, base, &ptr);
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CHECK_FAIL(err);
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if (ptr != 0) {
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err = read_string(J->P, buffer, sizeof(buffer), ptr);
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CHECK_FAIL(err);
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*stringp = strdup(buffer);
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}
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return PS_OK;
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fail:
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return err;
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}
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static int parse_vmstruct_entry(jvm_agent_t* J, uint64_t base, VMStructEntry* vmp) {
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uint64_t ptr;
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int err;
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err = read_string_pointer(J, base + OFFSET_VMStructEntrytypeName, &vmp->typeName);
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CHECK_FAIL(err);
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err = read_string_pointer(J, base + OFFSET_VMStructEntryfieldName, &vmp->fieldName);
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CHECK_FAIL(err);
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err = read_pointer(J, base + OFFSET_VMStructEntryaddress, &vmp->address);
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CHECK_FAIL(err);
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return PS_OK;
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fail:
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if (vmp->typeName != NULL) free((void*)vmp->typeName);
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if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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return err;
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}
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static int parse_vmstructs(jvm_agent_t* J) {
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VMStructEntry vmVar;
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VMStructEntry* vmp = &vmVar;
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uint64_t gHotSpotVMStructs;
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psaddr_t sym_addr;
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uint64_t base;
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int err;
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err = ps_pglobal_lookup(J->P, LIBJVM_SO, "gHotSpotVMStructs", &sym_addr);
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CHECK_FAIL(err);
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err = read_pointer(J, sym_addr, &gHotSpotVMStructs);
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CHECK_FAIL(err);
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base = gHotSpotVMStructs;
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err = PS_OK;
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while (err == PS_OK) {
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memset(vmp, 0, sizeof(VMStructEntry));
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err = parse_vmstruct_entry(J, base, vmp);
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if (err != PS_OK || vmp->typeName == NULL) {
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break;
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}
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277 |
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if (vmp->typeName[0] == 'C' && strcmp("CodeCache", vmp->typeName) == 0) {
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if (strcmp("_heap", vmp->fieldName) == 0) {
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err = read_pointer(J, vmp->address, &J->CodeCache_heap_address);
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}
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} else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) {
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if (strcmp("_methodKlassObj", vmp->fieldName) == 0) {
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J->Universe_methodKlassObj_address = vmp->address;
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}
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if (strcmp("_narrow_oop._base", vmp->fieldName) == 0) {
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J->Universe_narrow_oop_base_address = vmp->address;
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}
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if (strcmp("_narrow_oop._shift", vmp->fieldName) == 0) {
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J->Universe_narrow_oop_shift_address = vmp->address;
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}
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}
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CHECK_FAIL(err);
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294 |
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base += SIZE_VMStructEntry;
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if (vmp->typeName != NULL) free((void*)vmp->typeName);
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297 |
if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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}
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299 |
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return PS_OK;
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fail:
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if (vmp->typeName != NULL) free((void*)vmp->typeName);
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if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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return -1;
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}
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307 |
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static int find_symbol(jvm_agent_t* J, const char *name, uint64_t* valuep) {
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psaddr_t sym_addr;
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int err;
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311 |
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err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr);
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313 |
if (err != PS_OK) goto fail;
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*valuep = sym_addr;
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315 |
return PS_OK;
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316 |
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317 |
fail:
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318 |
return err;
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319 |
}
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320 |
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321 |
static int read_volatiles(jvm_agent_t* J) {
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322 |
uint64_t ptr;
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int err;
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324 |
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err = find_symbol(J, "UseCompressedOops", &J->Use_Compressed_Oops_address);
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326 |
if (err == PS_OK) {
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err = ps_pread(J->P, J->Use_Compressed_Oops_address, &J->Use_Compressed_Oops, sizeof(uint8_t));
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328 |
CHECK_FAIL(err);
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329 |
} else {
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330 |
J->Use_Compressed_Oops = 0;
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331 |
}
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332 |
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333 |
err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj);
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334 |
CHECK_FAIL(err);
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335 |
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336 |
err = read_pointer(J, J->Universe_narrow_oop_base_address, &J->Universe_narrow_oop_base);
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337 |
CHECK_FAIL(err);
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338 |
err = ps_pread(J->P, J->Universe_narrow_oop_shift_address, &J->Universe_narrow_oop_shift, sizeof(uint32_t));
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339 |
CHECK_FAIL(err);
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340 |
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341 |
err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
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342 |
OFFSET_VirtualSpace_low, &J->CodeCache_low);
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343 |
CHECK_FAIL(err);
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344 |
err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
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|
345 |
OFFSET_VirtualSpace_high, &J->CodeCache_high);
|
|
|
346 |
CHECK_FAIL(err);
|
|
|
347 |
err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap +
|
|
|
348 |
OFFSET_VirtualSpace_low, &J->CodeCache_segmap_low);
|
|
|
349 |
CHECK_FAIL(err);
|
|
|
350 |
err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap +
|
|
|
351 |
OFFSET_VirtualSpace_high, &J->CodeCache_segmap_high);
|
|
|
352 |
CHECK_FAIL(err);
|
|
|
353 |
|
|
|
354 |
err = ps_pread(J->P, J->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size,
|
|
|
355 |
&J->SIZE_CodeCache_log2_segment, sizeof(J->SIZE_CodeCache_log2_segment));
|
|
|
356 |
CHECK_FAIL(err);
|
|
|
357 |
|
|
|
358 |
return PS_OK;
|
|
|
359 |
|
|
|
360 |
fail:
|
|
|
361 |
return err;
|
|
|
362 |
}
|
|
|
363 |
|
|
|
364 |
|
|
|
365 |
static int codecache_contains(jvm_agent_t* J, uint64_t ptr) {
|
|
|
366 |
/* make sure the code cache is up to date */
|
|
|
367 |
return (J->CodeCache_low <= ptr && ptr < J->CodeCache_high);
|
|
|
368 |
}
|
|
|
369 |
|
|
|
370 |
static uint64_t segment_for(jvm_agent_t* J, uint64_t p) {
|
|
|
371 |
return (p - J->CodeCache_low) >> J->SIZE_CodeCache_log2_segment;
|
|
|
372 |
}
|
|
|
373 |
|
|
|
374 |
static uint64_t block_at(jvm_agent_t* J, int i) {
|
|
|
375 |
return J->CodeCache_low + (i << J->SIZE_CodeCache_log2_segment);
|
|
|
376 |
}
|
|
|
377 |
|
|
|
378 |
static int find_start(jvm_agent_t* J, uint64_t ptr, uint64_t *startp) {
|
|
|
379 |
int err;
|
|
|
380 |
|
|
|
381 |
*startp = 0;
|
|
|
382 |
if (J->CodeCache_low <= ptr && ptr < J->CodeCache_high) {
|
|
|
383 |
int32_t used;
|
|
|
384 |
uint64_t segment = segment_for(J, ptr);
|
|
|
385 |
uint64_t block = J->CodeCache_segmap_low;
|
|
|
386 |
uint8_t tag;
|
|
|
387 |
err = ps_pread(J->P, block + segment, &tag, sizeof(tag));
|
|
|
388 |
CHECK_FAIL(err);
|
|
|
389 |
if (tag == 0xff)
|
|
|
390 |
return PS_OK;
|
|
|
391 |
while (tag > 0) {
|
|
|
392 |
err = ps_pread(J->P, block + segment, &tag, sizeof(tag));
|
|
|
393 |
CHECK_FAIL(err);
|
|
|
394 |
segment -= tag;
|
|
|
395 |
}
|
|
|
396 |
block = block_at(J, segment);
|
|
|
397 |
err = ps_pread(J->P, block + OFFSET_HeapBlockHeader_used, &used, sizeof(used));
|
|
|
398 |
CHECK_FAIL(err);
|
|
|
399 |
if (used) {
|
|
|
400 |
*startp = block + SIZE_HeapBlockHeader;
|
|
|
401 |
}
|
|
|
402 |
}
|
|
|
403 |
return PS_OK;
|
|
|
404 |
|
|
|
405 |
fail:
|
|
|
406 |
return -1;
|
|
|
407 |
}
|
|
|
408 |
|
|
|
409 |
static int find_jlong_constant(jvm_agent_t* J, const char *name, uint64_t* valuep) {
|
|
|
410 |
psaddr_t sym_addr;
|
|
|
411 |
int err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr);
|
|
|
412 |
if (err == PS_OK) {
|
|
|
413 |
err = ps_pread(J->P, sym_addr, valuep, sizeof(uint64_t));
|
|
|
414 |
return err;
|
|
|
415 |
}
|
|
|
416 |
*valuep = -1;
|
|
|
417 |
return -1;
|
|
|
418 |
}
|
|
|
419 |
|
|
|
420 |
jvm_agent_t *Jagent_create(struct ps_prochandle *P, int vers) {
|
|
|
421 |
jvm_agent_t* J;
|
|
|
422 |
int err;
|
|
|
423 |
|
|
|
424 |
if (vers != JVM_DB_VERSION) {
|
|
|
425 |
errno = ENOTSUP;
|
|
|
426 |
return NULL;
|
|
|
427 |
}
|
|
|
428 |
|
|
|
429 |
J = (jvm_agent_t*)calloc(sizeof(struct jvm_agent), 1);
|
|
|
430 |
|
|
|
431 |
debug = getenv("LIBJVMDB_DEBUG") != NULL;
|
|
|
432 |
if (debug) debug = 3;
|
|
|
433 |
|
|
|
434 |
if (debug) {
|
|
|
435 |
fprintf(stderr, "Jagent_create: debug=%d\n", debug);
|
|
|
436 |
#ifdef X86_COMPILER2
|
|
|
437 |
fprintf(stderr, "Jagent_create: R_SP=%d, R_FP=%d, POINTER_SIZE=%d\n", R_SP, R_FP, POINTER_SIZE);
|
|
|
438 |
#endif /* X86_COMPILER2 */
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
J->P = P;
|
|
|
442 |
|
|
|
443 |
// Initialize the initial previous frame
|
|
|
444 |
|
|
|
445 |
J->prev_fr.fp = 0;
|
|
|
446 |
J->prev_fr.pc = 0;
|
|
|
447 |
J->prev_fr.sp = 0;
|
|
|
448 |
J->prev_fr.sender_sp = 0;
|
|
|
449 |
|
|
|
450 |
err = find_symbol(J, "__1cHnmethodG__vtbl_", &J->nmethod_vtbl);
|
|
|
451 |
CHECK_FAIL(err);
|
|
|
452 |
err = find_symbol(J, "__1cKBufferBlobG__vtbl_", &J->BufferBlob_vtbl);
|
|
|
453 |
if (err != PS_OK) J->BufferBlob_vtbl = 0;
|
|
|
454 |
err = find_symbol(J, "__1cICodeBlobG__vtbl_", &J->CodeBlob_vtbl);
|
|
|
455 |
CHECK_FAIL(err);
|
|
|
456 |
err = find_symbol(J, "__1cLRuntimeStubG__vtbl_", &J->RuntimeStub_vtbl);
|
|
|
457 |
CHECK_FAIL(err);
|
|
|
458 |
|
|
|
459 |
err = parse_vmstructs(J);
|
|
|
460 |
CHECK_FAIL(err);
|
|
|
461 |
err = read_volatiles(J);
|
|
|
462 |
CHECK_FAIL(err);
|
|
|
463 |
|
|
|
464 |
return J;
|
|
|
465 |
|
|
|
466 |
fail:
|
|
|
467 |
Jagent_destroy(J);
|
|
|
468 |
return NULL;
|
|
|
469 |
}
|
|
|
470 |
|
|
|
471 |
void Jagent_destroy(jvm_agent_t *J) {
|
|
|
472 |
if (J != NULL) {
|
|
|
473 |
free(J);
|
|
|
474 |
}
|
|
|
475 |
}
|
|
|
476 |
|
|
|
477 |
static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) {
|
|
|
478 |
uint64_t klass;
|
|
|
479 |
int err;
|
|
|
480 |
// If UseCompressedOops, this was a compressed oop.
|
|
|
481 |
if (J->Use_Compressed_Oops != 0) {
|
|
|
482 |
uint32_t cklass;
|
|
|
483 |
err = read_compressed_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata,
|
|
|
484 |
&cklass);
|
|
|
485 |
// decode heap oop, same as oop.inline.hpp
|
|
|
486 |
klass = (uint64_t)((uintptr_t)J->Universe_narrow_oop_base +
|
|
|
487 |
((uintptr_t)cklass << J->Universe_narrow_oop_shift));
|
|
|
488 |
} else {
|
|
|
489 |
err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, &klass);
|
|
|
490 |
}
|
|
|
491 |
if (err != PS_OK) goto fail;
|
|
|
492 |
return klass == J->Universe_methodKlassObj;
|
|
|
493 |
|
|
|
494 |
fail:
|
|
|
495 |
return 0;
|
|
|
496 |
}
|
|
|
497 |
|
|
|
498 |
static int
|
|
|
499 |
name_for_methodOop(jvm_agent_t* J, uint64_t methodOopPtr, char * result, size_t size)
|
|
|
500 |
{
|
|
|
501 |
short nameIndex;
|
|
|
502 |
short signatureIndex;
|
|
|
503 |
uint64_t constantPool;
|
|
|
504 |
uint64_t constMethod;
|
|
|
505 |
uint64_t nameSymbol;
|
|
|
506 |
uint64_t signatureSymbol;
|
|
|
507 |
uint64_t klassPtr;
|
|
|
508 |
uint64_t klassSymbol;
|
|
|
509 |
short klassSymbolLength;
|
|
|
510 |
short nameSymbolLength;
|
|
|
511 |
short signatureSymbolLength;
|
|
|
512 |
char * nameString = NULL;
|
|
|
513 |
char * klassString = NULL;
|
|
|
514 |
char * signatureString = NULL;
|
|
|
515 |
int err;
|
|
|
516 |
|
|
|
517 |
err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constants, &constantPool);
|
|
|
518 |
CHECK_FAIL(err);
|
|
|
519 |
err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
520 |
CHECK_FAIL(err);
|
|
|
521 |
|
|
|
522 |
/* To get name string */
|
|
|
523 |
err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_name_index, &nameIndex, 2);
|
|
|
524 |
CHECK_FAIL(err);
|
|
|
525 |
err = read_pointer(J, constantPool + nameIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &nameSymbol);
|
|
|
526 |
CHECK_FAIL(err);
|
|
|
527 |
// The symbol is a CPSlot and has lower bit set to indicate metadata
|
|
|
528 |
nameSymbol &= (~1); // remove metadata lsb
|
|
|
529 |
err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_length, &nameSymbolLength, 2);
|
|
|
530 |
CHECK_FAIL(err);
|
|
|
531 |
nameString = (char*)calloc(nameSymbolLength + 1, 1);
|
|
|
532 |
err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_body, nameString, nameSymbolLength);
|
|
|
533 |
CHECK_FAIL(err);
|
|
|
534 |
|
|
|
535 |
/* To get signature string */
|
|
|
536 |
err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_signature_index, &signatureIndex, 2);
|
|
|
537 |
CHECK_FAIL(err);
|
|
|
538 |
err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &signatureSymbol);
|
|
|
539 |
CHECK_FAIL(err);
|
|
|
540 |
signatureSymbol &= (~1); // remove metadata lsb
|
|
|
541 |
err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_length, &signatureSymbolLength, 2);
|
|
|
542 |
CHECK_FAIL(err);
|
|
|
543 |
signatureString = (char*)calloc(signatureSymbolLength + 1, 1);
|
|
|
544 |
err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_body, signatureString, signatureSymbolLength);
|
|
|
545 |
CHECK_FAIL(err);
|
|
|
546 |
|
|
|
547 |
/* To get klass string */
|
|
|
548 |
err = read_pointer(J, constantPool + OFFSET_constantPoolOopDesc_pool_holder, &klassPtr);
|
|
|
549 |
CHECK_FAIL(err);
|
|
|
550 |
err = read_pointer(J, klassPtr + OFFSET_Klass_name + SIZE_oopDesc, &klassSymbol);
|
|
|
551 |
CHECK_FAIL(err);
|
|
|
552 |
err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_length, &klassSymbolLength, 2);
|
|
|
553 |
CHECK_FAIL(err);
|
|
|
554 |
klassString = (char*)calloc(klassSymbolLength + 1, 1);
|
|
|
555 |
err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_body, klassString, klassSymbolLength);
|
|
|
556 |
CHECK_FAIL(err);
|
|
|
557 |
|
|
|
558 |
result[0] = '\0';
|
|
|
559 |
strncat(result, klassString, size);
|
|
|
560 |
size -= strlen(klassString);
|
|
|
561 |
strncat(result, ".", size);
|
|
|
562 |
size -= 1;
|
|
|
563 |
strncat(result, nameString, size);
|
|
|
564 |
size -= strlen(nameString);
|
|
|
565 |
strncat(result, signatureString, size);
|
|
|
566 |
|
|
|
567 |
if (nameString != NULL) free(nameString);
|
|
|
568 |
if (klassString != NULL) free(klassString);
|
|
|
569 |
if (signatureString != NULL) free(signatureString);
|
|
|
570 |
|
|
|
571 |
return PS_OK;
|
|
|
572 |
|
|
|
573 |
fail:
|
|
|
574 |
if (debug) {
|
|
|
575 |
fprintf(stderr, "name_for_methodOop: FAIL \n\n");
|
|
|
576 |
}
|
|
|
577 |
if (nameString != NULL) free(nameString);
|
|
|
578 |
if (klassString != NULL) free(klassString);
|
|
|
579 |
if (signatureString != NULL) free(signatureString);
|
|
|
580 |
return -1;
|
|
|
581 |
}
|
|
|
582 |
|
|
|
583 |
static int nmethod_info(Nmethod_t *N)
|
|
|
584 |
{
|
|
|
585 |
jvm_agent_t *J = N->J;
|
|
|
586 |
uint64_t nm = N->nm;
|
|
|
587 |
int32_t err;
|
|
|
588 |
|
|
|
589 |
if (debug > 2 )
|
|
|
590 |
fprintf(stderr, "\t nmethod_info: BEGIN \n");
|
|
|
591 |
|
|
|
592 |
/* Instructions */
|
|
|
593 |
err = ps_pread(J->P, nm + OFFSET_CodeBlob_code_offset, &N->instrs_beg, SZ32);
|
|
|
594 |
CHECK_FAIL(err);
|
|
|
595 |
err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32);
|
|
|
596 |
CHECK_FAIL(err);
|
|
|
597 |
err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32);
|
|
|
598 |
CHECK_FAIL(err);
|
|
|
599 |
err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32);
|
|
|
600 |
CHECK_FAIL(err);
|
|
|
601 |
|
|
|
602 |
/* Oops */
|
|
|
603 |
err = ps_pread(J->P, nm + OFFSET_nmethod_oops_offset, &N->oops_beg, SZ32);
|
|
|
604 |
CHECK_FAIL(err);
|
|
|
605 |
err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->oops_end, SZ32);
|
|
|
606 |
CHECK_FAIL(err);
|
|
|
607 |
|
|
|
608 |
/* scopes_pcs */
|
|
|
609 |
err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32);
|
|
|
610 |
CHECK_FAIL(err);
|
|
|
611 |
err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32);
|
|
|
612 |
CHECK_FAIL(err);
|
|
|
613 |
|
|
|
614 |
/* scopes_data */
|
|
|
615 |
err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32);
|
|
|
616 |
CHECK_FAIL(err);
|
|
|
617 |
|
|
|
618 |
if (debug > 2 ) {
|
|
|
619 |
N->scopes_data_end = N->scopes_pcs_beg;
|
|
|
620 |
|
|
|
621 |
fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n",
|
|
|
622 |
N->instrs_beg, N->instrs_end);
|
|
|
623 |
|
|
|
624 |
fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n",
|
|
|
625 |
N->deopt_beg);
|
|
|
626 |
|
|
|
627 |
fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n",
|
|
|
628 |
N->orig_pc_offset);
|
|
|
629 |
|
|
|
630 |
fprintf(stderr, "\t nmethod_info: oops_beg: %#x, oops_end: %#x\n",
|
|
|
631 |
N->oops_beg, N->oops_end);
|
|
|
632 |
|
|
|
633 |
fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n",
|
|
|
634 |
N->scopes_data_beg, N->scopes_data_end);
|
|
|
635 |
|
|
|
636 |
fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n",
|
|
|
637 |
N->scopes_pcs_beg, N->scopes_pcs_end);
|
|
|
638 |
|
|
|
639 |
fprintf(stderr, "\t nmethod_info: END \n\n");
|
|
|
640 |
}
|
|
|
641 |
return PS_OK;
|
|
|
642 |
|
|
|
643 |
fail:
|
|
|
644 |
return err;
|
|
|
645 |
}
|
|
|
646 |
|
|
|
647 |
static int
|
|
|
648 |
raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val)
|
|
|
649 |
{
|
|
|
650 |
int shift = 0;
|
|
|
651 |
int value = 0;
|
|
|
652 |
uint8_t ch = 0;
|
|
|
653 |
int32_t err;
|
|
|
654 |
int32_t sum;
|
|
|
655 |
// Constants for UNSIGNED5 coding of Pack200
|
|
|
656 |
// see compressedStream.hpp
|
|
|
657 |
enum {
|
|
|
658 |
lg_H = 6,
|
|
|
659 |
H = 1<<lg_H,
|
|
|
660 |
BitsPerByte = 8,
|
|
|
661 |
L = (1<<BitsPerByte)-H,
|
|
|
662 |
};
|
|
|
663 |
int i;
|
|
|
664 |
|
|
|
665 |
err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t));
|
|
|
666 |
CHECK_FAIL(err);
|
|
|
667 |
if (debug > 2)
|
|
|
668 |
fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch);
|
|
|
669 |
|
|
|
670 |
sum = ch;
|
|
|
671 |
if ( sum >= L ) {
|
|
|
672 |
int32_t lg_H_i = lg_H;
|
|
|
673 |
// Read maximum of 5 total bytes (we've already read 1).
|
|
|
674 |
// See CompressedReadStream::read_int_mb
|
|
|
675 |
for ( i = 0; i < 4; i++) {
|
|
|
676 |
err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t));
|
|
|
677 |
CHECK_FAIL(err);
|
|
|
678 |
sum += ch << lg_H_i;
|
|
|
679 |
if (ch < L ) {
|
|
|
680 |
*val = sum;
|
|
|
681 |
return PS_OK;
|
|
|
682 |
}
|
|
|
683 |
lg_H_i += lg_H;
|
|
|
684 |
}
|
|
|
685 |
}
|
|
|
686 |
*val = sum;
|
|
|
687 |
return PS_OK;
|
|
|
688 |
|
|
|
689 |
fail:
|
|
|
690 |
return err;
|
|
|
691 |
}
|
|
|
692 |
|
|
|
693 |
static int
|
|
|
694 |
read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line)
|
|
|
695 |
{
|
|
|
696 |
uint8_t next = 0;
|
|
|
697 |
int32_t bci_delta;
|
|
|
698 |
int32_t line_delta;
|
|
|
699 |
int32_t err;
|
|
|
700 |
|
|
|
701 |
if (debug > 2)
|
|
|
702 |
fprintf(stderr, "\t\t read_pair: BEGIN\n");
|
|
|
703 |
|
|
|
704 |
err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t));
|
|
|
705 |
CHECK_FAIL(err);
|
|
|
706 |
|
|
|
707 |
if (next == 0) {
|
|
|
708 |
if (debug > 2)
|
|
|
709 |
fprintf(stderr, "\t\t read_pair: END: next == 0\n");
|
|
|
710 |
return 1; /* stream terminated */
|
|
|
711 |
}
|
|
|
712 |
if (next == 0xFF) {
|
|
|
713 |
if (debug > 2)
|
|
|
714 |
fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n");
|
|
|
715 |
|
|
|
716 |
/* Escape character, regular compression used */
|
|
|
717 |
|
|
|
718 |
err = raw_read_int(J, buffer, &bci_delta);
|
|
|
719 |
CHECK_FAIL(err);
|
|
|
720 |
|
|
|
721 |
err = raw_read_int(J, buffer, &line_delta);
|
|
|
722 |
CHECK_FAIL(err);
|
|
|
723 |
|
|
|
724 |
*bci += bci_delta;
|
|
|
725 |
*line += line_delta;
|
|
|
726 |
|
|
|
727 |
if (debug > 2) {
|
|
|
728 |
fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n",
|
|
|
729 |
line_delta, bci_delta);
|
|
|
730 |
fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n",
|
|
|
731 |
*line, *bci);
|
|
|
732 |
}
|
|
|
733 |
} else {
|
|
|
734 |
/* Single byte compression used */
|
|
|
735 |
*bci += next >> 3;
|
|
|
736 |
*line += next & 0x7;
|
|
|
737 |
if (debug > 2) {
|
|
|
738 |
fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n",
|
|
|
739 |
next & 0x7, next >> 3);
|
|
|
740 |
fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n",
|
|
|
741 |
*line, *bci);
|
|
|
742 |
}
|
|
|
743 |
}
|
|
|
744 |
if (debug > 2)
|
|
|
745 |
fprintf(stderr, "\t\t read_pair: END\n");
|
|
|
746 |
return PS_OK;
|
|
|
747 |
|
|
|
748 |
fail:
|
|
|
749 |
if (debug)
|
|
|
750 |
fprintf(stderr, "\t\t read_pair: FAIL\n");
|
|
|
751 |
return err;
|
|
|
752 |
}
|
|
|
753 |
|
|
|
754 |
static int
|
|
|
755 |
line_number_from_bci(jvm_agent_t* J, Vframe_t *vf)
|
|
|
756 |
{
|
|
|
757 |
uint64_t buffer;
|
|
|
758 |
uint16_t code_size;
|
|
|
759 |
uint64_t code_end_delta;
|
|
|
760 |
uint64_t constMethod;
|
|
|
761 |
int8_t access_flags;
|
|
|
762 |
int32_t best_bci = 0;
|
|
|
763 |
int32_t stream_bci = 0;
|
|
|
764 |
int32_t stream_line = 0;
|
|
|
765 |
int32_t err;
|
|
|
766 |
|
|
|
767 |
if (debug > 2) {
|
|
|
768 |
char name[256];
|
|
|
769 |
err = name_for_methodOop(J, vf->methodOop, name, 256);
|
|
|
770 |
CHECK_FAIL(err);
|
|
|
771 |
fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n",
|
|
|
772 |
name, vf->bci);
|
|
|
773 |
}
|
|
|
774 |
|
|
|
775 |
err = read_pointer(J, vf->methodOop + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
776 |
CHECK_FAIL(err);
|
|
|
777 |
|
|
|
778 |
vf->line = 0;
|
|
|
779 |
err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_flags, &access_flags, sizeof(int8_t));
|
|
|
780 |
CHECK_FAIL(err);
|
|
|
781 |
|
|
|
782 |
if (!(access_flags & constMethodOopDesc_has_linenumber_table)) {
|
|
|
783 |
if (debug > 2)
|
|
|
784 |
fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n");
|
|
|
785 |
return PS_OK;
|
|
|
786 |
}
|
|
|
787 |
|
|
|
788 |
/* The line numbers are a short array of 2-tuples [start_pc, line_number].
|
|
|
789 |
* Not necessarily sorted and not necessarily one-to-one.
|
|
|
790 |
*/
|
|
|
791 |
|
|
|
792 |
err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_code_size, &code_size, SZ16);
|
|
|
793 |
CHECK_FAIL(err);
|
|
|
794 |
|
|
|
795 |
/* inlined_table_start() */
|
|
|
796 |
code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0;
|
|
|
797 |
buffer = constMethod + (uint64_t) SIZE_constMethodOopDesc + (uint64_t) code_size + code_end_delta;
|
|
|
798 |
|
|
|
799 |
if (debug > 2) {
|
|
|
800 |
fprintf(stderr, "\t\t line_number_from_bci: methodOop: %#llx, native: %d\n",
|
|
|
801 |
vf->methodOop, (access_flags & AccessFlags_NATIVE));
|
|
|
802 |
fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n",
|
|
|
803 |
buffer, (int) code_size);
|
|
|
804 |
}
|
|
|
805 |
|
|
|
806 |
while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) {
|
|
|
807 |
if (stream_bci == vf->bci) {
|
|
|
808 |
/* perfect match */
|
|
|
809 |
if (debug > 2)
|
|
|
810 |
fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line);
|
|
|
811 |
vf->line = stream_line;
|
|
|
812 |
return PS_OK;
|
|
|
813 |
} else {
|
|
|
814 |
/* update best_bci/line */
|
|
|
815 |
if (stream_bci < vf->bci && stream_bci >= best_bci) {
|
|
|
816 |
best_bci = stream_bci;
|
|
|
817 |
vf->line = stream_line;
|
|
|
818 |
if (debug > 2) {
|
|
|
819 |
fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n",
|
|
|
820 |
best_bci, vf->line);
|
|
|
821 |
}
|
|
|
822 |
}
|
|
|
823 |
}
|
|
|
824 |
}
|
|
|
825 |
if (debug > 2)
|
|
|
826 |
fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line);
|
|
|
827 |
return PS_OK;
|
|
|
828 |
|
|
|
829 |
fail:
|
|
|
830 |
if (debug)
|
|
|
831 |
fprintf(stderr, "\t line_number_from_bci: FAIL\n");
|
|
|
832 |
return err;
|
|
|
833 |
}
|
|
|
834 |
|
|
|
835 |
static int
|
|
|
836 |
get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc)
|
|
|
837 |
{
|
|
|
838 |
int32_t pc_offset;
|
|
|
839 |
int32_t err;
|
|
|
840 |
|
|
|
841 |
err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32);
|
|
|
842 |
CHECK_FAIL(err);
|
|
|
843 |
|
|
|
844 |
*real_pc = N->nm + N->instrs_beg + pc_offset;
|
|
|
845 |
if (debug > 2) {
|
|
|
846 |
fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n",
|
|
|
847 |
pc_offset, *real_pc);
|
|
|
848 |
}
|
|
|
849 |
return PS_OK;
|
|
|
850 |
|
|
|
851 |
fail:
|
|
|
852 |
return err;
|
|
|
853 |
}
|
|
|
854 |
|
|
|
855 |
/* Finds a PcDesc with real-pc equal to N->pc */
|
|
|
856 |
static int pc_desc_at(Nmethod_t *N)
|
|
|
857 |
{
|
|
|
858 |
uint64_t pc_diff;
|
|
|
859 |
int32_t offs;
|
|
|
860 |
int32_t err;
|
|
|
861 |
|
|
|
862 |
if (debug > 2)
|
|
|
863 |
fprintf(stderr, "\t pc_desc_at: BEGIN\n");
|
|
|
864 |
|
|
|
865 |
N->vf_cnt = 0;
|
|
|
866 |
N->pc_desc = 0;
|
|
|
867 |
|
|
|
868 |
for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) {
|
|
|
869 |
uint64_t pd;
|
|
|
870 |
uint64_t best_pc_diff = 16; /* some approximation */
|
|
|
871 |
uint64_t real_pc = 0;
|
|
|
872 |
|
|
|
873 |
pd = N->nm + offs;
|
|
|
874 |
err = get_real_pc(N, pd, &real_pc);
|
|
|
875 |
CHECK_FAIL(err);
|
|
|
876 |
|
|
|
877 |
pc_diff = real_pc - N->pc;
|
|
|
878 |
|
|
|
879 |
/* In general, this fragment should work */
|
|
|
880 |
if (pc_diff == 0) {
|
|
|
881 |
N->pc_desc = pd;
|
|
|
882 |
if (debug) {
|
|
|
883 |
fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd);
|
|
|
884 |
}
|
|
|
885 |
return PS_OK;
|
|
|
886 |
}
|
|
|
887 |
/* This fragment is to be able to find out an appropriate
|
|
|
888 |
* pc_desc entry even if pc_desc info is inaccurate.
|
|
|
889 |
*/
|
|
|
890 |
if (best_pc_diff > pc_diff && pc_diff > 0) {
|
|
|
891 |
best_pc_diff = pc_diff;
|
|
|
892 |
N->pc_desc = pd;
|
|
|
893 |
}
|
|
|
894 |
}
|
|
|
895 |
if (debug) {
|
|
|
896 |
fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND");
|
|
|
897 |
if (pc_diff < 20)
|
|
|
898 |
fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff);
|
|
|
899 |
else
|
|
|
900 |
fprintf(stderr, "\n\n");
|
|
|
901 |
}
|
|
|
902 |
return PS_OK;
|
|
|
903 |
|
|
|
904 |
fail:
|
|
|
905 |
return err;
|
|
|
906 |
}
|
|
|
907 |
|
|
|
908 |
static int
|
|
|
909 |
scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf)
|
|
|
910 |
{
|
|
|
911 |
uint64_t buffer;
|
|
|
912 |
int32_t err;
|
|
|
913 |
|
|
|
914 |
if (debug > 2) {
|
|
|
915 |
fprintf(stderr, "\t\t scope_desc_at: BEGIN \n");
|
|
|
916 |
}
|
|
|
917 |
|
|
|
918 |
buffer = N->nm + N->scopes_data_beg + decode_offset;
|
|
|
919 |
|
|
|
920 |
err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset);
|
|
|
921 |
CHECK_FAIL(err);
|
|
|
922 |
|
|
|
923 |
err = raw_read_int(N->J, &buffer, &vf->methodIdx);
|
|
|
924 |
CHECK_FAIL(err);
|
|
|
925 |
|
|
|
926 |
err = raw_read_int(N->J, &buffer, &vf->bci);
|
|
|
927 |
CHECK_FAIL(err);
|
|
|
928 |
|
|
|
929 |
if (debug > 2) {
|
|
|
930 |
fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n",
|
|
|
931 |
vf->sender_decode_offset);
|
|
|
932 |
fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx);
|
|
|
933 |
fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci);
|
|
|
934 |
|
|
|
935 |
fprintf(stderr, "\t\t scope_desc_at: END \n\n");
|
|
|
936 |
}
|
|
|
937 |
return PS_OK;
|
|
|
938 |
|
|
|
939 |
fail:
|
|
|
940 |
return err;
|
|
|
941 |
}
|
|
|
942 |
|
|
|
943 |
static int scopeDesc_chain(Nmethod_t *N) {
|
|
|
944 |
int32_t decode_offset = 0;
|
|
|
945 |
int32_t err;
|
|
|
946 |
|
|
|
947 |
if (debug > 2) {
|
|
|
948 |
fprintf(stderr, "\t scopeDesc_chain: BEGIN\n");
|
|
|
949 |
}
|
|
|
950 |
|
|
|
951 |
err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset,
|
|
|
952 |
&decode_offset, SZ32);
|
|
|
953 |
CHECK_FAIL(err);
|
|
|
954 |
|
|
|
955 |
while (decode_offset > 0) {
|
|
|
956 |
Vframe_t *vf = &N->vframes[N->vf_cnt];
|
|
|
957 |
|
|
|
958 |
if (debug > 2) {
|
|
|
959 |
fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset);
|
|
|
960 |
}
|
|
|
961 |
|
|
|
962 |
err = scope_desc_at(N, decode_offset, vf);
|
|
|
963 |
CHECK_FAIL(err);
|
|
|
964 |
|
|
|
965 |
if (vf->methodIdx > ((N->oops_end - N->oops_beg) / POINTER_SIZE)) {
|
|
|
966 |
fprintf(stderr, "\t scopeDesc_chain: (methodIdx > oops length) !\n");
|
|
|
967 |
return -1;
|
|
|
968 |
}
|
|
|
969 |
err = read_pointer(N->J, N->nm + N->oops_beg + (vf->methodIdx-1)*POINTER_SIZE,
|
|
|
970 |
&vf->methodOop);
|
|
|
971 |
CHECK_FAIL(err);
|
|
|
972 |
|
|
|
973 |
if (vf->methodOop) {
|
|
|
974 |
N->vf_cnt++;
|
|
|
975 |
err = line_number_from_bci(N->J, vf);
|
|
|
976 |
CHECK_FAIL(err);
|
|
|
977 |
if (debug > 2) {
|
|
|
978 |
fprintf(stderr, "\t scopeDesc_chain: methodOop: %#8llx, line: %ld\n",
|
|
|
979 |
vf->methodOop, vf->line);
|
|
|
980 |
}
|
|
|
981 |
}
|
|
|
982 |
decode_offset = vf->sender_decode_offset;
|
|
|
983 |
}
|
|
|
984 |
if (debug > 2) {
|
|
|
985 |
fprintf(stderr, "\t scopeDesc_chain: END \n\n");
|
|
|
986 |
}
|
|
|
987 |
return PS_OK;
|
|
|
988 |
|
|
|
989 |
fail:
|
|
|
990 |
if (debug) {
|
|
|
991 |
fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n");
|
|
|
992 |
}
|
|
|
993 |
return err;
|
|
|
994 |
}
|
|
|
995 |
|
|
|
996 |
|
|
|
997 |
static int
|
|
|
998 |
name_for_nmethod(jvm_agent_t* J,
|
|
|
999 |
uint64_t nm,
|
|
|
1000 |
uint64_t pc,
|
|
|
1001 |
uint64_t methodOop,
|
|
|
1002 |
char *result,
|
|
|
1003 |
size_t size,
|
|
|
1004 |
Jframe_t *jframe
|
|
|
1005 |
) {
|
|
|
1006 |
Nmethod_t *N;
|
|
|
1007 |
Vframe_t *vf;
|
|
|
1008 |
int32_t err;
|
|
|
1009 |
int deoptimized = 0;
|
|
|
1010 |
|
|
|
1011 |
if (debug) {
|
|
|
1012 |
fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc);
|
|
|
1013 |
}
|
|
|
1014 |
if (J->N == NULL) {
|
|
|
1015 |
J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t));
|
|
|
1016 |
}
|
|
|
1017 |
memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */
|
|
|
1018 |
N = J->N;
|
|
|
1019 |
N->J = J;
|
|
|
1020 |
N->nm = nm;
|
|
|
1021 |
N->pc = pc;
|
|
|
1022 |
N->jframe = jframe;
|
|
|
1023 |
|
|
|
1024 |
err = nmethod_info(N);
|
|
|
1025 |
CHECK_FAIL(err);
|
|
|
1026 |
if (debug) {
|
|
|
1027 |
fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n",
|
|
|
1028 |
pc, N->nm + N->deopt_beg);
|
|
|
1029 |
}
|
|
|
1030 |
|
|
|
1031 |
/* check for a deoptimized frame */
|
|
|
1032 |
if ( pc == N->nm + N->deopt_beg) {
|
|
|
1033 |
uint64_t base;
|
|
|
1034 |
if (debug) {
|
|
|
1035 |
fprintf(stderr, "name_for_nmethod: found deoptimized frame\n");
|
|
|
1036 |
}
|
|
|
1037 |
if (J->prev_fr.sender_sp != 0) {
|
|
|
1038 |
base = J->prev_fr.sender_sp + N->orig_pc_offset;
|
|
|
1039 |
} else {
|
|
|
1040 |
base = J->curr_fr.sp + N->orig_pc_offset;
|
|
|
1041 |
}
|
|
|
1042 |
err = read_pointer(J, base, &N->pc);
|
|
|
1043 |
CHECK_FAIL(err);
|
|
|
1044 |
if (debug) {
|
|
|
1045 |
fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n",
|
|
|
1046 |
pc, N->pc);
|
|
|
1047 |
}
|
|
|
1048 |
deoptimized = 1;
|
|
|
1049 |
}
|
|
|
1050 |
|
|
|
1051 |
err = pc_desc_at(N);
|
|
|
1052 |
CHECK_FAIL(err);
|
|
|
1053 |
|
|
|
1054 |
if (N->pc_desc > 0) {
|
|
|
1055 |
jframe->locinf = 1;
|
|
|
1056 |
err = scopeDesc_chain(N);
|
|
|
1057 |
CHECK_FAIL(err);
|
|
|
1058 |
}
|
|
|
1059 |
result[0] = COMP_METHOD_SIGN;
|
|
|
1060 |
vf = &N->vframes[0];
|
|
|
1061 |
if (N->vf_cnt > 0) {
|
|
|
1062 |
jframe->vf_cnt = N->vf_cnt;
|
|
|
1063 |
jframe->bci = vf->bci;
|
|
|
1064 |
jframe->line = vf->line;
|
|
|
1065 |
err = name_for_methodOop(J, N->vframes[0].methodOop, result+1, size-1);
|
|
|
1066 |
CHECK_FAIL(err);
|
|
|
1067 |
} else {
|
|
|
1068 |
err = name_for_methodOop(J, methodOop, result+1, size-1);
|
|
|
1069 |
CHECK_FAIL(err);
|
|
|
1070 |
}
|
|
|
1071 |
if (deoptimized) {
|
|
|
1072 |
strncat(result + 1, " [deoptimized frame]; ", size-1);
|
|
|
1073 |
} else {
|
|
|
1074 |
strncat(result + 1, " [compiled] ", size-1);
|
|
|
1075 |
}
|
|
|
1076 |
if (debug)
|
|
|
1077 |
fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n",
|
|
|
1078 |
result, N->vf_cnt);
|
|
|
1079 |
return PS_OK;
|
|
|
1080 |
|
|
|
1081 |
fail:
|
|
|
1082 |
if (debug)
|
|
|
1083 |
fprintf(stderr, "name_for_nmethod: FAIL \n\n");
|
|
|
1084 |
return err;
|
|
|
1085 |
}
|
|
|
1086 |
|
|
|
1087 |
int is_bci(intptr_t bcx) {
|
|
|
1088 |
switch (DATA_MODEL) {
|
|
|
1089 |
case PR_MODEL_LP64:
|
|
|
1090 |
return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ;
|
|
|
1091 |
case PR_MODEL_ILP32:
|
|
|
1092 |
default:
|
|
|
1093 |
return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE;
|
|
|
1094 |
}
|
|
|
1095 |
}
|
|
|
1096 |
|
|
|
1097 |
static int
|
|
|
1098 |
name_for_imethod(jvm_agent_t* J,
|
|
|
1099 |
uint64_t bcx,
|
|
|
1100 |
uint64_t methodOop,
|
|
|
1101 |
char *result,
|
|
|
1102 |
size_t size,
|
|
|
1103 |
Jframe_t *jframe
|
|
|
1104 |
) {
|
|
|
1105 |
uint64_t bci;
|
|
|
1106 |
uint64_t constMethod;
|
|
|
1107 |
Vframe_t vframe = {0};
|
|
|
1108 |
Vframe_t *vf = &vframe;
|
|
|
1109 |
int32_t err;
|
|
|
1110 |
|
|
|
1111 |
err = read_pointer(J, methodOop + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
1112 |
CHECK_FAIL(err);
|
|
|
1113 |
|
|
|
1114 |
bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_constMethodOopDesc);
|
|
|
1115 |
|
|
|
1116 |
if (debug)
|
|
|
1117 |
fprintf(stderr, "\t name_for_imethod: BEGIN: methodOop: %#llx\n", methodOop);
|
|
|
1118 |
|
|
|
1119 |
err = name_for_methodOop(J, methodOop, result, size);
|
|
|
1120 |
CHECK_FAIL(err);
|
|
|
1121 |
if (debug)
|
|
|
1122 |
fprintf(stderr, "\t name_for_imethod: method name: %s\n", result);
|
|
|
1123 |
|
|
|
1124 |
if (bci > 0) {
|
|
|
1125 |
vf->methodOop = methodOop;
|
|
|
1126 |
vf->bci = bci;
|
|
|
1127 |
err = line_number_from_bci(J, vf);
|
|
|
1128 |
CHECK_FAIL(err);
|
|
|
1129 |
}
|
|
|
1130 |
jframe->bci = vf->bci;
|
|
|
1131 |
jframe->line = vf->line;
|
|
|
1132 |
jframe->locinf = 1;
|
|
|
1133 |
|
|
|
1134 |
if (debug) {
|
|
|
1135 |
fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n",
|
|
|
1136 |
vf->bci, vf->line);
|
|
|
1137 |
}
|
|
|
1138 |
return PS_OK;
|
|
|
1139 |
|
|
|
1140 |
fail:
|
|
|
1141 |
if (debug)
|
|
|
1142 |
fprintf(stderr, "\t name_for_imethod: FAIL\n");
|
|
|
1143 |
return err;
|
|
|
1144 |
}
|
|
|
1145 |
|
|
|
1146 |
static int
|
|
|
1147 |
name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result,
|
|
|
1148 |
size_t size, Jframe_t *jframe, int* is_interpreted)
|
|
|
1149 |
{
|
|
|
1150 |
uint64_t start;
|
|
|
1151 |
uint64_t vtbl;
|
|
|
1152 |
int32_t err;
|
|
|
1153 |
*is_interpreted = 0;
|
|
|
1154 |
|
|
|
1155 |
result[0] = '\0';
|
|
|
1156 |
|
|
|
1157 |
err = find_start(J, pc, &start);
|
|
|
1158 |
CHECK_FAIL(err);
|
|
|
1159 |
|
|
|
1160 |
err = read_pointer(J, start, &vtbl);
|
|
|
1161 |
CHECK_FAIL(err);
|
|
|
1162 |
|
|
|
1163 |
if (vtbl == J->nmethod_vtbl) {
|
|
|
1164 |
uint64_t methodOop;
|
|
|
1165 |
|
|
|
1166 |
err = read_pointer(J, start + OFFSET_nmethod_method, &methodOop);
|
|
|
1167 |
CHECK_FAIL(err);
|
|
|
1168 |
|
|
|
1169 |
if (debug) {
|
|
|
1170 |
fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, methodOop: %#8llx \n",
|
|
|
1171 |
start, pc, methodOop);
|
|
|
1172 |
}
|
|
|
1173 |
err = name_for_nmethod(J, start, pc, methodOop, result, size, jframe);
|
|
|
1174 |
CHECK_FAIL(err);
|
|
|
1175 |
} else if (vtbl == J->BufferBlob_vtbl) {
|
|
|
1176 |
const char * name;
|
|
|
1177 |
|
|
|
1178 |
err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name);
|
|
|
1179 |
|
|
|
1180 |
/*
|
|
|
1181 |
* Temporary usage of string "Interpreter".
|
|
|
1182 |
* We need some other way to distinguish "StubRoutines"
|
|
|
1183 |
* and regular interpreted frames.
|
|
|
1184 |
*/
|
|
|
1185 |
if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) {
|
|
|
1186 |
*is_interpreted = 1;
|
|
|
1187 |
if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1188 |
return name_for_imethod(J, J->bcx, J->methodOopPtr, result, size, jframe);
|
|
|
1189 |
}
|
|
|
1190 |
}
|
|
|
1191 |
|
|
|
1192 |
if (err == PS_OK) {
|
|
|
1193 |
strncpy(result, name, size);
|
|
|
1194 |
free((void*)name);
|
|
|
1195 |
} else {
|
|
|
1196 |
strncpy(result, "<unknown BufferBlob>", size);
|
|
|
1197 |
}
|
|
|
1198 |
/* return PS_OK; */
|
|
|
1199 |
} else {
|
|
|
1200 |
const char * name;
|
|
|
1201 |
|
|
|
1202 |
err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name);
|
|
|
1203 |
if (err == PS_OK) {
|
|
|
1204 |
strncpy(result, name, size);
|
|
|
1205 |
free((void*)name);
|
|
|
1206 |
} else {
|
|
|
1207 |
strncpy(result, "<unknown CodeBlob>", size);
|
|
|
1208 |
WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl);
|
|
|
1209 |
}
|
|
|
1210 |
}
|
|
|
1211 |
result[size-1] = '\0';
|
|
|
1212 |
|
|
|
1213 |
#ifdef X86_COMPILER2
|
|
|
1214 |
if (vtbl != J->RuntimeStub_vtbl) {
|
|
|
1215 |
uint64_t trial_pc;
|
|
|
1216 |
int frame_size;
|
|
|
1217 |
err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size,
|
|
|
1218 |
&frame_size, SZ32);
|
|
|
1219 |
CHECK_FAIL(err);
|
|
|
1220 |
|
|
|
1221 |
// frame_size is in words, we want bytes.
|
|
|
1222 |
frame_size *= POINTER_SIZE; /* word => byte conversion */
|
|
|
1223 |
|
|
|
1224 |
/*
|
|
|
1225 |
Because c2 doesn't use FP as a framepointer the value of sp/fp we receive
|
|
|
1226 |
in the initial entry to a set of stack frames containing server frames
|
|
|
1227 |
will pretty much be nonsense. We can detect that nonsense by looking to
|
|
|
1228 |
see if the PC we received is correct if we look at the expected storage
|
|
|
1229 |
location in relation to the FP (ie. POINTER_SIZE(FP) )
|
|
|
1230 |
*/
|
|
|
1231 |
|
|
|
1232 |
err = read_pointer(J, fp + POINTER_SIZE , &trial_pc);
|
|
|
1233 |
if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) {
|
|
|
1234 |
// Either we couldn't even read at the "fp" or the pc didn't match
|
|
|
1235 |
// both are sure clues that the fp is bogus. We no search the stack
|
|
|
1236 |
// for a reasonable number of words trying to find the bogus fp
|
|
|
1237 |
// and the current pc in adjacent words. The we will be able to
|
|
|
1238 |
// deduce an approximation of the frame pointer and actually get
|
|
|
1239 |
// the correct stack pointer. Which we can then unwind for the
|
|
|
1240 |
// next frame.
|
|
|
1241 |
int i;
|
|
|
1242 |
uint64_t check;
|
|
|
1243 |
uint64_t base = J->curr_fr.sp;
|
|
|
1244 |
uint64_t prev_fp = 0;
|
|
|
1245 |
for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) {
|
|
|
1246 |
err = read_pointer(J, base , &check);
|
|
|
1247 |
CHECK_FAIL(err);
|
|
|
1248 |
if (check == fp) {
|
|
|
1249 |
base += POINTER_SIZE;
|
|
|
1250 |
err = read_pointer(J, base , &check);
|
|
|
1251 |
CHECK_FAIL(err);
|
|
|
1252 |
if (check == pc) {
|
|
|
1253 |
if (debug) {
|
|
|
1254 |
fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE);
|
|
|
1255 |
}
|
|
|
1256 |
prev_fp = base - 2 * POINTER_SIZE;
|
|
|
1257 |
break;
|
|
|
1258 |
}
|
|
|
1259 |
}
|
|
|
1260 |
}
|
|
|
1261 |
if ( prev_fp != 0 ) {
|
|
|
1262 |
// real_sp is the sp we should have received for this frame
|
|
|
1263 |
uint64_t real_sp = prev_fp + 2 * POINTER_SIZE;
|
|
|
1264 |
// +POINTER_SIZE because callee owns the return address so caller's sp is +1 word
|
|
|
1265 |
jframe->new_sp = real_sp + frame_size + POINTER_SIZE;
|
|
|
1266 |
err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc);
|
|
|
1267 |
CHECK_FAIL(err);
|
|
|
1268 |
err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp);
|
|
|
1269 |
CHECK_FAIL(err);
|
|
|
1270 |
return PS_OK;
|
|
|
1271 |
}
|
|
|
1272 |
}
|
|
|
1273 |
|
|
|
1274 |
/* A prototype to workaround FP absence */
|
|
|
1275 |
/*
|
|
|
1276 |
* frame_size can be 0 for StubRoutines (1) frame.
|
|
|
1277 |
* In this case it should work with fp as usual.
|
|
|
1278 |
*/
|
|
|
1279 |
if (frame_size > 0) {
|
|
|
1280 |
jframe->new_fp = J->prev_fr.fp + frame_size;
|
|
|
1281 |
jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE;
|
|
|
1282 |
} else {
|
|
|
1283 |
memset(&J->curr_fr, 0, sizeof(Frame_t));
|
|
|
1284 |
err = read_pointer(J, fp, &jframe->new_fp);
|
|
|
1285 |
CHECK_FAIL(err);
|
|
|
1286 |
|
|
|
1287 |
err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc);
|
|
|
1288 |
CHECK_FAIL(err);
|
|
|
1289 |
}
|
|
|
1290 |
if (debug) {
|
|
|
1291 |
fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n",
|
|
|
1292 |
result, frame_size);
|
|
|
1293 |
fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n",
|
|
|
1294 |
J->prev_fr.fp, jframe->new_fp);
|
|
|
1295 |
}
|
|
|
1296 |
}
|
|
|
1297 |
#endif /* X86_COMPILER2 */
|
|
|
1298 |
|
|
|
1299 |
return PS_OK;
|
|
|
1300 |
|
|
|
1301 |
fail:
|
|
|
1302 |
return err;
|
|
|
1303 |
}
|
|
|
1304 |
|
|
|
1305 |
int Jget_vframe(jvm_agent_t* J, int vframe_no,
|
|
|
1306 |
char *name, size_t size, Jframe_t *jframe)
|
|
|
1307 |
{
|
|
|
1308 |
Nmethod_t *N = J->N;
|
|
|
1309 |
Vframe_t *vf;
|
|
|
1310 |
int32_t err;
|
|
|
1311 |
|
|
|
1312 |
if (vframe_no >= N->vf_cnt) {
|
|
|
1313 |
(void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no);
|
|
|
1314 |
return -1;
|
|
|
1315 |
}
|
|
|
1316 |
vf = N->vframes + vframe_no;
|
|
|
1317 |
name[0] = COMP_METHOD_SIGN;
|
|
|
1318 |
err = name_for_methodOop(J, vf->methodOop, name + 1, size);
|
|
|
1319 |
CHECK_FAIL(err);
|
|
|
1320 |
|
|
|
1321 |
jframe->bci = vf->bci;
|
|
|
1322 |
jframe->line = vf->line;
|
|
|
1323 |
if (debug) {
|
|
|
1324 |
fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n",
|
|
|
1325 |
name, vf->line);
|
|
|
1326 |
}
|
|
|
1327 |
return PS_OK;
|
|
|
1328 |
|
|
|
1329 |
fail:
|
|
|
1330 |
if (debug) {
|
|
|
1331 |
fprintf(stderr, "\t Jget_vframe: FAIL\n");
|
|
|
1332 |
}
|
|
|
1333 |
return err;
|
|
|
1334 |
}
|
|
|
1335 |
|
|
|
1336 |
#define MAX_SYM_SIZE 256
|
|
|
1337 |
|
|
|
1338 |
int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name,
|
|
|
1339 |
size_t size, Jframe_t *jframe) {
|
|
|
1340 |
uintptr_t fp;
|
|
|
1341 |
uintptr_t pc;
|
|
|
1342 |
/* arguments given to read_pointer need to be worst case sized */
|
|
|
1343 |
uint64_t methodOopPtr = 0;
|
|
|
1344 |
uint64_t sender_sp;
|
|
|
1345 |
uint64_t bcx = 0;
|
|
|
1346 |
int is_interpreted = 0;
|
|
|
1347 |
int result = PS_OK;
|
|
|
1348 |
int err = PS_OK;
|
|
|
1349 |
|
|
|
1350 |
if (J == NULL) {
|
|
|
1351 |
return -1;
|
|
|
1352 |
}
|
|
|
1353 |
|
|
|
1354 |
jframe->vf_cnt = 1;
|
|
|
1355 |
jframe->new_fp = 0;
|
|
|
1356 |
jframe->new_pc = 0;
|
|
|
1357 |
jframe->line = 0;
|
|
|
1358 |
jframe->bci = 0;
|
|
|
1359 |
jframe->locinf = 0;
|
|
|
1360 |
|
|
|
1361 |
read_volatiles(J);
|
|
|
1362 |
pc = (uintptr_t) regs[R_PC];
|
|
|
1363 |
J->curr_fr.pc = pc;
|
|
|
1364 |
J->curr_fr.fp = regs[R_FP];
|
|
|
1365 |
J->curr_fr.sp = regs[R_SP];
|
|
|
1366 |
|
|
|
1367 |
if (debug)
|
|
|
1368 |
fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc);
|
|
|
1369 |
|
|
|
1370 |
#if defined(sparc) || defined(__sparc)
|
|
|
1371 |
/* The following workaround is for SPARC. CALL instruction occupates 8 bytes.
|
|
|
1372 |
* In the pcDesc structure return pc offset is recorded for CALL instructions.
|
|
|
1373 |
* regs[R_PC] contains a CALL instruction pc offset.
|
|
|
1374 |
*/
|
|
|
1375 |
pc += 8;
|
|
|
1376 |
bcx = (uintptr_t) regs[R_L1];
|
|
|
1377 |
methodOopPtr = (uintptr_t) regs[R_L2];
|
|
|
1378 |
sender_sp = regs[R_I5];
|
|
|
1379 |
if (debug > 2) {
|
|
|
1380 |
fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n",
|
|
|
1381 |
regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]);
|
|
|
1382 |
}
|
|
|
1383 |
#elif defined(i386) || defined(__i386) || defined(__amd64)
|
|
|
1384 |
|
|
|
1385 |
fp = (uintptr_t) regs[R_FP];
|
|
|
1386 |
if (J->prev_fr.fp == 0) {
|
|
|
1387 |
#ifdef X86_COMPILER2
|
|
|
1388 |
/* A workaround for top java frames */
|
|
|
1389 |
J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE);
|
|
|
1390 |
#else
|
|
|
1391 |
J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE);
|
|
|
1392 |
#endif /* COMPILER2 */
|
|
|
1393 |
}
|
|
|
1394 |
if (debug > 2) {
|
|
|
1395 |
printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp);
|
|
|
1396 |
}
|
|
|
1397 |
|
|
|
1398 |
if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodOopPtr) != PS_OK) {
|
|
|
1399 |
methodOopPtr = 0;
|
|
|
1400 |
}
|
|
|
1401 |
if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) {
|
|
|
1402 |
sender_sp = 0;
|
|
|
1403 |
}
|
|
|
1404 |
if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) {
|
|
|
1405 |
bcx = 0;
|
|
|
1406 |
}
|
|
|
1407 |
#endif /* i386 */
|
|
|
1408 |
|
|
|
1409 |
J->methodOopPtr = methodOopPtr;
|
|
|
1410 |
J->bcx = bcx;
|
|
|
1411 |
|
|
|
1412 |
/* On x86 with C2 JVM: native frame may have wrong regs[R_FP]
|
|
|
1413 |
* For example: JVM_SuspendThread frame poins to the top interpreted frame.
|
|
|
1414 |
* If we call is_methodOop(J, methodOopPtr) before codecache_contains(J, pc)
|
|
|
1415 |
* then we go over and omit both: nmethod and I2CAdapter frames.
|
|
|
1416 |
* Note, that regs[R_PC] is always correct if frame defined correctly.
|
|
|
1417 |
* So it is better to call codecache_contains(J, pc) from the beginning.
|
|
|
1418 |
*/
|
|
|
1419 |
#ifndef X86_COMPILER2
|
|
|
1420 |
if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1421 |
result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe);
|
|
|
1422 |
/* If the methodOopPtr is a method then this is highly likely to be
|
|
|
1423 |
an interpreter frame */
|
|
|
1424 |
if (result >= 0) {
|
|
|
1425 |
is_interpreted = 1;
|
|
|
1426 |
}
|
|
|
1427 |
} else
|
|
|
1428 |
#endif /* ! X86_COMPILER2 */
|
|
|
1429 |
|
|
|
1430 |
if (codecache_contains(J, pc)) {
|
|
|
1431 |
result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted);
|
|
|
1432 |
}
|
|
|
1433 |
#ifdef X86_COMPILER2
|
|
|
1434 |
else if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1435 |
result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe);
|
|
|
1436 |
/* If the methodOopPtr is a method then this is highly likely to be
|
|
|
1437 |
an interpreter frame */
|
|
|
1438 |
if (result >= 0) {
|
|
|
1439 |
is_interpreted = 1;
|
|
|
1440 |
}
|
|
|
1441 |
}
|
|
|
1442 |
#endif /* X86_COMPILER2 */
|
|
|
1443 |
else {
|
|
|
1444 |
if (debug) {
|
|
|
1445 |
fprintf(stderr, "Jlookup_by_regs: END with -1\n\n");
|
|
|
1446 |
}
|
|
|
1447 |
result = -1;
|
|
|
1448 |
}
|
|
|
1449 |
if (!is_interpreted) {
|
|
|
1450 |
sender_sp = 0;
|
|
|
1451 |
}
|
|
|
1452 |
J->curr_fr.sender_sp = sender_sp;
|
|
|
1453 |
|
|
|
1454 |
#ifdef X86_COMPILER2
|
|
|
1455 |
if (!J->curr_fr.fp) {
|
|
|
1456 |
J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP];
|
|
|
1457 |
}
|
|
|
1458 |
if (!jframe->new_pc && jframe->new_fp) {
|
|
|
1459 |
// This seems dubious
|
|
|
1460 |
read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc);
|
|
|
1461 |
CHECK_FAIL(err);
|
|
|
1462 |
if (debug > 2) {
|
|
|
1463 |
printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n",
|
|
|
1464 |
jframe->new_fp, jframe->new_pc);
|
|
|
1465 |
}
|
|
|
1466 |
}
|
|
|
1467 |
|
|
|
1468 |
#endif /* X86_COMPILER2 */
|
|
|
1469 |
J->prev_fr = J->curr_fr;
|
|
|
1470 |
|
|
|
1471 |
if (debug)
|
|
|
1472 |
fprintf(stderr, "Jlookup_by_regs: END\n\n");
|
|
|
1473 |
|
|
|
1474 |
return result;
|
|
|
1475 |
|
|
|
1476 |
fail:
|
|
|
1477 |
return err;
|
|
|
1478 |
}
|
|
|
1479 |
|
|
|
1480 |
void update_gregs(prgregset_t gregs, Jframe_t jframe) {
|
|
|
1481 |
#ifdef X86_COMPILER2
|
|
|
1482 |
if (debug > 0) {
|
|
|
1483 |
fprintf(stderr, "update_gregs: before update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]);
|
|
|
1484 |
}
|
|
|
1485 |
/*
|
|
|
1486 |
* A workaround for java C2 frames with unconventional FP.
|
|
|
1487 |
* may have to modify regset with new values for FP/PC/SP when needed.
|
|
|
1488 |
*/
|
|
|
1489 |
if (jframe.new_sp) {
|
|
|
1490 |
*((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp;
|
|
|
1491 |
} else {
|
|
|
1492 |
// *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE;
|
|
|
1493 |
}
|
|
|
1494 |
|
|
|
1495 |
if (jframe.new_fp) {
|
|
|
1496 |
*((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp;
|
|
|
1497 |
}
|
|
|
1498 |
if (jframe.new_pc) {
|
|
|
1499 |
*((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc;
|
|
|
1500 |
}
|
|
|
1501 |
if (debug > 0) {
|
|
|
1502 |
fprintf(stderr, "update_gregs: after update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]);
|
|
|
1503 |
}
|
|
|
1504 |
#endif /* X86_COMPILER2 */
|
|
|
1505 |
}
|
|
|
1506 |
|
|
|
1507 |
/*
|
|
|
1508 |
* Iterates over java frames at current location given by 'gregs'.
|
|
|
1509 |
*
|
|
|
1510 |
* Returns -1 if no java frames are present or if an error is encountered.
|
|
|
1511 |
* Returns the result of calling 'func' if the return value is non-zero.
|
|
|
1512 |
* Returns 0 otherwise.
|
|
|
1513 |
*/
|
|
|
1514 |
int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) {
|
|
|
1515 |
char buf[MAX_SYM_SIZE + 1];
|
|
|
1516 |
Jframe_t jframe;
|
|
|
1517 |
int i = 0, res;
|
|
|
1518 |
#ifdef X86_COMPILER2
|
|
|
1519 |
if (debug > 0) {
|
|
|
1520 |
fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]);
|
|
|
1521 |
}
|
|
|
1522 |
#endif /* X86_COMPILER2 */
|
|
|
1523 |
|
|
|
1524 |
memset(&jframe, 0, sizeof(Jframe_t));
|
|
|
1525 |
memset(buf, 0, sizeof(buf));
|
|
|
1526 |
res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe);
|
|
|
1527 |
if (res != PS_OK)
|
|
|
1528 |
return (-1);
|
|
|
1529 |
|
|
|
1530 |
|
|
|
1531 |
res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1,
|
|
|
1532 |
jframe.line, NULL);
|
|
|
1533 |
if (res != 0) {
|
|
|
1534 |
update_gregs(gregs, jframe);
|
|
|
1535 |
return (res);
|
|
|
1536 |
}
|
|
|
1537 |
for (i = 1; i < jframe.vf_cnt; i++) {
|
|
|
1538 |
Jget_vframe(J, i, buf, sizeof(buf), &jframe);
|
|
|
1539 |
res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1,
|
|
|
1540 |
jframe.line, NULL);
|
|
|
1541 |
if (res != 0) {
|
|
|
1542 |
update_gregs(gregs, jframe);
|
|
|
1543 |
return (res);
|
|
|
1544 |
}
|
|
|
1545 |
}
|
|
|
1546 |
update_gregs(gregs, jframe);
|
|
|
1547 |
return (0);
|
|
|
1548 |
}
|