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0
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1 /*
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include <stdio.h>
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26 #include <stdlib.h>
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27 #include <string.h>
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28 #include <errno.h>
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29 #include <gelf.h>
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30
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31 #include "libjvm_db.h"
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32 #include "JvmOffsets.h"
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33
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34 #define LIBJVM_SO "libjvm.so"
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35
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36 #if defined(i386) || defined(__i386) || defined(__amd64)
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37 #ifdef COMPILER2
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38 #define X86_COMPILER2
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39 #endif /* COMPILER2 */
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40 #endif /* i386 */
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41
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42 typedef struct {
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43 short vf_cnt; /* number of recognized java vframes */
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44 short bci; /* current frame method byte code index */
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45 int line; /* current frame method source line */
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46 uint64_t new_fp; /* fp for the next frame */
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47 uint64_t new_pc; /* pc for the next frame */
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48 uint64_t new_sp; /* "raw" sp for the next frame (includes extension by interpreter/adapter */
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49 char locinf; /* indicates there is valid location info */
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50 } Jframe_t;
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51
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52 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name,
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53 size_t size, Jframe_t *jframe);
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54
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55 int main(int arg) { return arg; }
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56
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57 static int debug = 0;
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58
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59 static void failed(int err, const char * file, int line) {
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60 if (debug) {
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61 fprintf(stderr, "failed %d at %s:%d\n", err, file, line);
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62 }
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63 }
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64
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65 static void warn(const char * file, int line, const char * msg) {
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66 if (debug) {
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67 fprintf(stderr, "warning: %s at %s:%d\n", msg, file, line);
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68 }
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69 }
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70
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71 static void warn1(const char * file, int line, const char * msg, intptr_t arg1) {
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72 if (debug) {
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73 fprintf(stderr, "warning: ");
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74 fprintf(stderr, msg, arg1);
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75 fprintf(stderr, " at %s:%d\n", file, line);
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76 }
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77 }
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78
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79 #define CHECK_FAIL(err) \
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80 if (err != PS_OK) { failed(err, __FILE__, __LINE__); goto fail; }
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81 #define WARN(msg) warn(__FILE__, __LINE__, msg)
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82 #define WARN1(msg, arg1) warn1(__FILE__, __LINE__, msg, arg1)
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83
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84 typedef struct VMStructEntry {
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85 const char * typeName; /* The type name containing the given field (example: "Klass") */
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86 const char * fieldName; /* The field name within the type (example: "_name") */
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87 uint64_t address; /* Address of field; only used for static fields */
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88 /* ("offset" can not be reused because of apparent SparcWorks compiler bug */
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89 /* in generation of initializer data) */
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90 } VMStructEntry;
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91
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92 /* Prototyping inlined methods */
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93
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94 int sprintf(char *s, const char *format, ...);
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95
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96 #define SZ16 sizeof(int16_t)
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97 #define SZ32 sizeof(int32_t)
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98
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99 #define COMP_METHOD_SIGN '*'
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100
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101 #define MAX_VFRAMES_CNT 256
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102
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103 typedef struct vframe {
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104 uint64_t methodOop;
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105 int32_t sender_decode_offset;
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106 int32_t methodIdx;
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107 int32_t bci;
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108 int32_t line;
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109 } Vframe_t;
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110
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111 typedef struct frame {
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112 uintptr_t fp;
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113 uintptr_t pc;
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114 uintptr_t sp;
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115 uintptr_t sender_sp; // The unextended sp of the caller
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116 } Frame_t;
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117
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118 typedef struct Nmethod_t {
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119 struct jvm_agent* J;
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120 Jframe_t *jframe;
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121
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122 uint64_t nm; /* _nmethod */
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123 uint64_t pc;
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124 uint64_t pc_desc;
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125
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126 int32_t orig_pc_offset; /* _orig_pc_offset */
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127 int32_t instrs_beg; /* _instructions_offset */
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128 int32_t instrs_end;
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129 int32_t deopt_beg; /* _deoptimize_offset */
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130 int32_t scopes_data_beg; /* _scopes_data_offset */
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131 int32_t scopes_data_end;
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132 int32_t oops_beg; /* _oops_offset */
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133 int32_t oops_len; /* _oops_length */
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134 int32_t scopes_pcs_beg; /* _scopes_pcs_offset */
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135 int32_t scopes_pcs_end;
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136
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137 int vf_cnt;
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138 Vframe_t vframes[MAX_VFRAMES_CNT];
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139 } Nmethod_t;
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140
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141 struct jvm_agent {
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142 struct ps_prochandle* P;
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143
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144 uint64_t nmethod_vtbl;
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145 uint64_t CodeBlob_vtbl;
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146 uint64_t BufferBlob_vtbl;
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147 uint64_t RuntimeStub_vtbl;
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148
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149 uint64_t Universe_methodKlassObj_address;
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150 uint64_t CodeCache_heap_address;
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151
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152 /* Volatiles */
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153 uint64_t Universe_methodKlassObj;
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154 uint64_t CodeCache_low;
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155 uint64_t CodeCache_high;
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156 uint64_t CodeCache_segmap_low;
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157 uint64_t CodeCache_segmap_high;
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158
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159 int32_t SIZE_CodeCache_log2_segment;
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160
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161 uint64_t methodOopPtr;
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162 uint64_t bcx;
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163
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164 Nmethod_t *N; /*Inlined methods support */
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165 Frame_t prev_fr;
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166 Frame_t curr_fr;
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167 };
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168
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169
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170 static int
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171 read_string(struct ps_prochandle *P,
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172 char *buf, /* caller's buffer */
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173 size_t size, /* upper limit on bytes to read */
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174 uintptr_t addr) /* address in process */
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175 {
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176 int err = PS_OK;
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177 while (size-- > 1 && err == PS_OK) {
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178 err = ps_pread(P, addr, buf, 1);
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179 if (*buf == '\0') {
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180 return PS_OK;
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181 }
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182 addr += 1;
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183 buf += 1;
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184 }
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185 return -1;
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186 }
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187
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188 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) {
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189 int err = -1;
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190 uint32_t ptr32;
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191
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192 switch (DATA_MODEL) {
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193 case PR_MODEL_LP64:
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194 err = ps_pread(J->P, base, ptr, sizeof(uint64_t));
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195 break;
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196 case PR_MODEL_ILP32:
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197 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t));
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198 *ptr = ptr32;
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199 break;
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200 }
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201
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202 return err;
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203 }
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204
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205 static int read_string_pointer(jvm_agent_t* J, uint64_t base, const char ** stringp) {
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206 uint64_t ptr;
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207 int err;
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208 char buffer[1024];
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209
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210 *stringp = NULL;
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211 err = read_pointer(J, base, &ptr);
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212 CHECK_FAIL(err);
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213 if (ptr != 0) {
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214 err = read_string(J->P, buffer, sizeof(buffer), ptr);
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215 CHECK_FAIL(err);
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216 *stringp = strdup(buffer);
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217 }
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218 return PS_OK;
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219
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220 fail:
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221 return err;
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222 }
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223
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224 static int parse_vmstruct_entry(jvm_agent_t* J, uint64_t base, VMStructEntry* vmp) {
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225 uint64_t ptr;
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226 int err;
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227
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228 err = read_string_pointer(J, base + OFFSET_VMStructEntrytypeName, &vmp->typeName);
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229 CHECK_FAIL(err);
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230 err = read_string_pointer(J, base + OFFSET_VMStructEntryfieldName, &vmp->fieldName);
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231 CHECK_FAIL(err);
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232 err = read_pointer(J, base + OFFSET_VMStructEntryaddress, &vmp->address);
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233 CHECK_FAIL(err);
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234
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235 return PS_OK;
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236
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237 fail:
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238 if (vmp->typeName != NULL) free((void*)vmp->typeName);
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239 if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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240 return err;
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241 }
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242
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243 static int parse_vmstructs(jvm_agent_t* J) {
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244 VMStructEntry vmVar;
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245 VMStructEntry* vmp = &vmVar;
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246 uint64_t gHotSpotVMStructs;
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247 psaddr_t sym_addr;
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248 uint64_t base;
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249 int err;
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250
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251 err = ps_pglobal_lookup(J->P, LIBJVM_SO, "gHotSpotVMStructs", &sym_addr);
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252 CHECK_FAIL(err);
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253 err = read_pointer(J, sym_addr, &gHotSpotVMStructs);
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254 CHECK_FAIL(err);
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255 base = gHotSpotVMStructs;
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256
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257 err = PS_OK;
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258 while (err == PS_OK) {
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259 memset(vmp, 0, sizeof(VMStructEntry));
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260 err = parse_vmstruct_entry(J, base, vmp);
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261 if (err != PS_OK || vmp->typeName == NULL) {
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262 break;
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263 }
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264
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265 if (vmp->typeName[0] == 'C' && strcmp("CodeCache", vmp->typeName) == 0) {
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266 if (strcmp("_heap", vmp->fieldName) == 0) {
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267 err = read_pointer(J, vmp->address, &J->CodeCache_heap_address);
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268 }
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269 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) {
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270 if (strcmp("_methodKlassObj", vmp->fieldName) == 0) {
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271 J->Universe_methodKlassObj_address = vmp->address;
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272 }
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273 }
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274 CHECK_FAIL(err);
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275
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276 base += SIZE_VMStructEntry;
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277 if (vmp->typeName != NULL) free((void*)vmp->typeName);
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278 if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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279 }
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280
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281 return PS_OK;
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282
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283 fail:
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284 if (vmp->typeName != NULL) free((void*)vmp->typeName);
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285 if (vmp->fieldName != NULL) free((void*)vmp->fieldName);
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286 return -1;
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287 }
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288
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289 static int read_volatiles(jvm_agent_t* J) {
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290 uint64_t ptr;
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291 int err;
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292
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293 err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj);
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294 CHECK_FAIL(err);
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295 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
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296 OFFSET_VirtualSpace_low, &J->CodeCache_low);
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297 CHECK_FAIL(err);
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298 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory +
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299 OFFSET_VirtualSpace_high, &J->CodeCache_high);
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300 CHECK_FAIL(err);
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301 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap +
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302 OFFSET_VirtualSpace_low, &J->CodeCache_segmap_low);
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303 CHECK_FAIL(err);
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304 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap +
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305 OFFSET_VirtualSpace_high, &J->CodeCache_segmap_high);
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306 CHECK_FAIL(err);
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307
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308 err = ps_pread(J->P, J->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size,
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309 &J->SIZE_CodeCache_log2_segment, sizeof(J->SIZE_CodeCache_log2_segment));
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310 CHECK_FAIL(err);
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311
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312 return PS_OK;
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313
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314 fail:
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315 return err;
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316 }
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317
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318
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319 static int codecache_contains(jvm_agent_t* J, uint64_t ptr) {
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320 /* make sure the code cache is up to date */
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321 return (J->CodeCache_low <= ptr && ptr < J->CodeCache_high);
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322 }
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323
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324 static uint64_t segment_for(jvm_agent_t* J, uint64_t p) {
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325 return (p - J->CodeCache_low) >> J->SIZE_CodeCache_log2_segment;
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326 }
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327
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328 static uint64_t block_at(jvm_agent_t* J, int i) {
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329 return J->CodeCache_low + (i << J->SIZE_CodeCache_log2_segment);
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330 }
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331
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332 static int find_start(jvm_agent_t* J, uint64_t ptr, uint64_t *startp) {
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333 int err;
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334
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335 *startp = 0;
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336 if (J->CodeCache_low <= ptr && ptr < J->CodeCache_high) {
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337 int32_t used;
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338 uint64_t segment = segment_for(J, ptr);
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339 uint64_t block = J->CodeCache_segmap_low;
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340 uint8_t tag;
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341 err = ps_pread(J->P, block + segment, &tag, sizeof(tag));
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342 CHECK_FAIL(err);
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343 if (tag == 0xff)
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344 return PS_OK;
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345 while (tag > 0) {
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346 err = ps_pread(J->P, block + segment, &tag, sizeof(tag));
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347 CHECK_FAIL(err);
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348 segment -= tag;
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349 }
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350 block = block_at(J, segment);
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351 err = ps_pread(J->P, block + OFFSET_HeapBlockHeader_used, &used, sizeof(used));
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352 CHECK_FAIL(err);
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353 if (used) {
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354 *startp = block + SIZE_HeapBlockHeader;
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355 }
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356 }
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357 return PS_OK;
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358
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359 fail:
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360 return -1;
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361 }
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362
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363 static int find_symbol(jvm_agent_t* J, const char *name, uint64_t* valuep) {
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364 psaddr_t sym_addr;
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365 int err;
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366
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367 err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr);
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368 if (err != PS_OK) goto fail;
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369 *valuep = sym_addr;
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370 return PS_OK;
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371
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372 fail:
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373 return err;
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374 }
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375
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376 static int find_jlong_constant(jvm_agent_t* J, const char *name, uint64_t* valuep) {
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377 psaddr_t sym_addr;
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378 int err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr);
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379 if (err == PS_OK) {
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380 err = ps_pread(J->P, sym_addr, valuep, sizeof(uint64_t));
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381 return err;
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382 }
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383 *valuep = -1;
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384 return -1;
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385 }
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386
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387 jvm_agent_t *Jagent_create(struct ps_prochandle *P, int vers) {
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388 jvm_agent_t* J;
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389 int err;
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390
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391 if (vers != JVM_DB_VERSION) {
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392 errno = ENOTSUP;
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393 return NULL;
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|
394 }
|
|
|
395
|
|
|
396 J = (jvm_agent_t*)calloc(sizeof(struct jvm_agent), 1);
|
|
|
397
|
|
|
398 debug = getenv("LIBJVMDB_DEBUG") != NULL;
|
|
|
399 if (debug) debug = 3;
|
|
|
400
|
|
|
401 if (debug) {
|
|
|
402 fprintf(stderr, "Jagent_create: debug=%d\n", debug);
|
|
|
403 #ifdef X86_COMPILER2
|
|
|
404 fprintf(stderr, "Jagent_create: R_SP=%d, R_FP=%d, POINTER_SIZE=%d\n", R_SP, R_FP, POINTER_SIZE);
|
|
|
405 #endif /* X86_COMPILER2 */
|
|
|
406 }
|
|
|
407
|
|
|
408 J->P = P;
|
|
|
409
|
|
|
410 // Initialize the initial previous frame
|
|
|
411
|
|
|
412 J->prev_fr.fp = 0;
|
|
|
413 J->prev_fr.pc = 0;
|
|
|
414 J->prev_fr.sp = 0;
|
|
|
415 J->prev_fr.sender_sp = 0;
|
|
|
416
|
|
|
417 err = find_symbol(J, "__1cHnmethodG__vtbl_", &J->nmethod_vtbl);
|
|
|
418 CHECK_FAIL(err);
|
|
|
419 err = find_symbol(J, "__1cKBufferBlobG__vtbl_", &J->BufferBlob_vtbl);
|
|
|
420 if (err != PS_OK) J->BufferBlob_vtbl = 0;
|
|
|
421 err = find_symbol(J, "__1cICodeBlobG__vtbl_", &J->CodeBlob_vtbl);
|
|
|
422 CHECK_FAIL(err);
|
|
|
423 err = find_symbol(J, "__1cLRuntimeStubG__vtbl_", &J->RuntimeStub_vtbl);
|
|
|
424 CHECK_FAIL(err);
|
|
|
425
|
|
|
426 err = parse_vmstructs(J);
|
|
|
427 CHECK_FAIL(err);
|
|
|
428 err = read_volatiles(J);
|
|
|
429 CHECK_FAIL(err);
|
|
|
430
|
|
|
431 return J;
|
|
|
432
|
|
|
433 fail:
|
|
|
434 Jagent_destroy(J);
|
|
|
435 return NULL;
|
|
|
436 }
|
|
|
437
|
|
|
438 void Jagent_destroy(jvm_agent_t *J) {
|
|
|
439 if (J != NULL) {
|
|
|
440 free(J);
|
|
|
441 }
|
|
|
442 }
|
|
|
443
|
|
|
444 static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) {
|
|
|
445 uint64_t klass;
|
|
|
446 int err;
|
|
|
447 err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_klass, &klass);
|
|
|
448 if (err != PS_OK) goto fail;
|
|
|
449 return klass == J->Universe_methodKlassObj;
|
|
|
450
|
|
|
451 fail:
|
|
|
452 return 0;
|
|
|
453 }
|
|
|
454
|
|
|
455 static int
|
|
|
456 name_for_methodOop(jvm_agent_t* J, uint64_t methodOopPtr, char * result, size_t size)
|
|
|
457 {
|
|
|
458 short nameIndex;
|
|
|
459 short signatureIndex;
|
|
|
460 uint64_t constantPool;
|
|
|
461 uint64_t constMethod;
|
|
|
462 uint64_t nameSymbol;
|
|
|
463 uint64_t signatureSymbol;
|
|
|
464 uint64_t klassPtr;
|
|
|
465 uint64_t klassSymbol;
|
|
|
466 short klassSymbolLength;
|
|
|
467 short nameSymbolLength;
|
|
|
468 short signatureSymbolLength;
|
|
|
469 char * nameString = NULL;
|
|
|
470 char * klassString = NULL;
|
|
|
471 char * signatureString = NULL;
|
|
|
472 int err;
|
|
|
473
|
|
|
474 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constants, &constantPool);
|
|
|
475 CHECK_FAIL(err);
|
|
|
476 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
477 CHECK_FAIL(err);
|
|
|
478
|
|
|
479 /* To get name string */
|
|
|
480 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_name_index, &nameIndex, 2);
|
|
|
481 CHECK_FAIL(err);
|
|
|
482 err = read_pointer(J, constantPool + nameIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &nameSymbol);
|
|
|
483 CHECK_FAIL(err);
|
|
|
484 err = ps_pread(J->P, nameSymbol + OFFSET_symbolOopDesc_length, &nameSymbolLength, 2);
|
|
|
485 CHECK_FAIL(err);
|
|
|
486 nameString = (char*)calloc(nameSymbolLength + 1, 1);
|
|
|
487 err = ps_pread(J->P, nameSymbol + OFFSET_symbolOopDesc_body, nameString, nameSymbolLength);
|
|
|
488 CHECK_FAIL(err);
|
|
|
489
|
|
|
490 /* To get signature string */
|
|
|
491 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_signature_index, &signatureIndex, 2);
|
|
|
492 CHECK_FAIL(err);
|
|
|
493 err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &signatureSymbol);
|
|
|
494 CHECK_FAIL(err);
|
|
|
495 err = ps_pread(J->P, signatureSymbol + OFFSET_symbolOopDesc_length, &signatureSymbolLength, 2);
|
|
|
496 CHECK_FAIL(err);
|
|
|
497 signatureString = (char*)calloc(signatureSymbolLength + 1, 1);
|
|
|
498 err = ps_pread(J->P, signatureSymbol + OFFSET_symbolOopDesc_body, signatureString, signatureSymbolLength);
|
|
|
499 CHECK_FAIL(err);
|
|
|
500
|
|
|
501 /* To get klass string */
|
|
|
502 err = read_pointer(J, constantPool + OFFSET_constantPoolOopDesc_pool_holder, &klassPtr);
|
|
|
503 CHECK_FAIL(err);
|
|
|
504 err = read_pointer(J, klassPtr + OFFSET_Klass_name + SIZE_oopDesc, &klassSymbol);
|
|
|
505 CHECK_FAIL(err);
|
|
|
506 err = ps_pread(J->P, klassSymbol + OFFSET_symbolOopDesc_length, &klassSymbolLength, 2);
|
|
|
507 CHECK_FAIL(err);
|
|
|
508 klassString = (char*)calloc(klassSymbolLength + 1, 1);
|
|
|
509 err = ps_pread(J->P, klassSymbol + OFFSET_symbolOopDesc_body, klassString, klassSymbolLength);
|
|
|
510 CHECK_FAIL(err);
|
|
|
511
|
|
|
512 result[0] = '\0';
|
|
|
513 strncat(result, klassString, size);
|
|
|
514 size -= strlen(klassString);
|
|
|
515 strncat(result, ".", size);
|
|
|
516 size -= 1;
|
|
|
517 strncat(result, nameString, size);
|
|
|
518 size -= strlen(nameString);
|
|
|
519 strncat(result, signatureString, size);
|
|
|
520
|
|
|
521 if (nameString != NULL) free(nameString);
|
|
|
522 if (klassString != NULL) free(klassString);
|
|
|
523 if (signatureString != NULL) free(signatureString);
|
|
|
524
|
|
|
525 return PS_OK;
|
|
|
526
|
|
|
527 fail:
|
|
|
528 if (debug) {
|
|
|
529 fprintf(stderr, "name_for_methodOop: FAIL \n\n");
|
|
|
530 }
|
|
|
531 if (nameString != NULL) free(nameString);
|
|
|
532 if (klassString != NULL) free(klassString);
|
|
|
533 if (signatureString != NULL) free(signatureString);
|
|
|
534 return -1;
|
|
|
535 }
|
|
|
536
|
|
|
537 static int nmethod_info(Nmethod_t *N)
|
|
|
538 {
|
|
|
539 jvm_agent_t *J = N->J;
|
|
|
540 uint64_t nm = N->nm;
|
|
|
541 int32_t err;
|
|
|
542
|
|
|
543 if (debug > 2 )
|
|
|
544 fprintf(stderr, "\t nmethod_info: BEGIN \n");
|
|
|
545
|
|
|
546 /* Instructions */
|
|
|
547 err = ps_pread(J->P, nm + OFFSET_CodeBlob_instructions_offset, &N->instrs_beg, SZ32);
|
|
|
548 CHECK_FAIL(err);
|
|
|
549 err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32);
|
|
|
550 CHECK_FAIL(err);
|
|
|
551 err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32);
|
|
|
552 CHECK_FAIL(err);
|
|
|
553 err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32);
|
|
|
554 CHECK_FAIL(err);
|
|
|
555
|
|
|
556 /* Oops */
|
|
|
557 err = ps_pread(J->P, nm + OFFSET_CodeBlob_oops_offset, &N->oops_beg, SZ32);
|
|
|
558 CHECK_FAIL(err);
|
|
|
559 err = ps_pread(J->P, nm + OFFSET_CodeBlob_oops_length, &N->oops_len, SZ32);
|
|
|
560 CHECK_FAIL(err);
|
|
|
561
|
|
|
562 /* scopes_pcs */
|
|
|
563 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32);
|
|
|
564 CHECK_FAIL(err);
|
|
|
565 err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32);
|
|
|
566 CHECK_FAIL(err);
|
|
|
567
|
|
|
568 /* scopes_data */
|
|
|
569 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32);
|
|
|
570 CHECK_FAIL(err);
|
|
|
571
|
|
|
572 if (debug > 2 ) {
|
|
|
573 N->scopes_data_end = N->scopes_pcs_beg;
|
|
|
574
|
|
|
575 fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n",
|
|
|
576 N->instrs_beg, N->instrs_end);
|
|
|
577
|
|
|
578 fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n",
|
|
|
579 N->deopt_beg);
|
|
|
580
|
|
|
581 fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n",
|
|
|
582 N->orig_pc_offset);
|
|
|
583
|
|
|
584 fprintf(stderr, "\t nmethod_info: oops_beg: %#x, oops_len: %#x\n",
|
|
|
585 N->oops_beg, N->oops_len);
|
|
|
586
|
|
|
587 fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n",
|
|
|
588 N->scopes_data_beg, N->scopes_data_end);
|
|
|
589
|
|
|
590 fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n",
|
|
|
591 N->scopes_pcs_beg, N->scopes_pcs_end);
|
|
|
592
|
|
|
593 fprintf(stderr, "\t nmethod_info: END \n\n");
|
|
|
594 }
|
|
|
595 return PS_OK;
|
|
|
596
|
|
|
597 fail:
|
|
|
598 return err;
|
|
|
599 }
|
|
|
600
|
|
|
601 static int
|
|
|
602 raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val)
|
|
|
603 {
|
|
|
604 int shift = 0;
|
|
|
605 int value = 0;
|
|
|
606 uint8_t ch = 0;
|
|
|
607 int32_t err;
|
|
|
608 int32_t sum;
|
|
|
609 // Constants for UNSIGNED5 coding of Pack200
|
|
|
610 // see compressedStream.hpp
|
|
|
611 enum {
|
|
|
612 lg_H = 6,
|
|
|
613 H = 1<<lg_H,
|
|
|
614 BitsPerByte = 8,
|
|
|
615 L = (1<<BitsPerByte)-H,
|
|
|
616 };
|
|
|
617 int i;
|
|
|
618
|
|
|
619 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t));
|
|
|
620 CHECK_FAIL(err);
|
|
|
621 if (debug > 2)
|
|
|
622 fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch);
|
|
|
623
|
|
|
624 sum = ch;
|
|
|
625 if ( sum >= L ) {
|
|
|
626 int32_t lg_H_i = lg_H;
|
|
|
627 // Read maximum of 5 total bytes (we've already read 1).
|
|
|
628 // See CompressedReadStream::read_int_mb
|
|
|
629 for ( i = 0; i < 4; i++) {
|
|
|
630 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t));
|
|
|
631 CHECK_FAIL(err);
|
|
|
632 sum += ch << lg_H_i;
|
|
|
633 if (ch < L ) {
|
|
|
634 *val = sum;
|
|
|
635 return PS_OK;
|
|
|
636 }
|
|
|
637 lg_H_i += lg_H;
|
|
|
638 }
|
|
|
639 }
|
|
|
640 *val = sum;
|
|
|
641 return PS_OK;
|
|
|
642
|
|
|
643 fail:
|
|
|
644 return err;
|
|
|
645 }
|
|
|
646
|
|
|
647 static int
|
|
|
648 read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line)
|
|
|
649 {
|
|
|
650 uint8_t next = 0;
|
|
|
651 int32_t bci_delta;
|
|
|
652 int32_t line_delta;
|
|
|
653 int32_t err;
|
|
|
654
|
|
|
655 if (debug > 2)
|
|
|
656 fprintf(stderr, "\t\t read_pair: BEGIN\n");
|
|
|
657
|
|
|
658 err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t));
|
|
|
659 CHECK_FAIL(err);
|
|
|
660
|
|
|
661 if (next == 0) {
|
|
|
662 if (debug > 2)
|
|
|
663 fprintf(stderr, "\t\t read_pair: END: next == 0\n");
|
|
|
664 return 1; /* stream terminated */
|
|
|
665 }
|
|
|
666 if (next == 0xFF) {
|
|
|
667 if (debug > 2)
|
|
|
668 fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n");
|
|
|
669
|
|
|
670 /* Escape character, regular compression used */
|
|
|
671
|
|
|
672 err = raw_read_int(J, buffer, &bci_delta);
|
|
|
673 CHECK_FAIL(err);
|
|
|
674
|
|
|
675 err = raw_read_int(J, buffer, &line_delta);
|
|
|
676 CHECK_FAIL(err);
|
|
|
677
|
|
|
678 *bci += bci_delta;
|
|
|
679 *line += line_delta;
|
|
|
680
|
|
|
681 if (debug > 2) {
|
|
|
682 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n",
|
|
|
683 line_delta, bci_delta);
|
|
|
684 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n",
|
|
|
685 *line, *bci);
|
|
|
686 }
|
|
|
687 } else {
|
|
|
688 /* Single byte compression used */
|
|
|
689 *bci += next >> 3;
|
|
|
690 *line += next & 0x7;
|
|
|
691 if (debug > 2) {
|
|
|
692 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n",
|
|
|
693 next & 0x7, next >> 3);
|
|
|
694 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n",
|
|
|
695 *line, *bci);
|
|
|
696 }
|
|
|
697 }
|
|
|
698 if (debug > 2)
|
|
|
699 fprintf(stderr, "\t\t read_pair: END\n");
|
|
|
700 return PS_OK;
|
|
|
701
|
|
|
702 fail:
|
|
|
703 if (debug)
|
|
|
704 fprintf(stderr, "\t\t read_pair: FAIL\n");
|
|
|
705 return err;
|
|
|
706 }
|
|
|
707
|
|
|
708 static int
|
|
|
709 line_number_from_bci(jvm_agent_t* J, Vframe_t *vf)
|
|
|
710 {
|
|
|
711 uint64_t buffer;
|
|
|
712 uint16_t code_size;
|
|
|
713 uint64_t code_end_delta;
|
|
|
714 uint64_t constMethod;
|
|
|
715 int8_t access_flags;
|
|
|
716 int32_t best_bci = 0;
|
|
|
717 int32_t stream_bci = 0;
|
|
|
718 int32_t stream_line = 0;
|
|
|
719 int32_t err;
|
|
|
720
|
|
|
721 if (debug > 2) {
|
|
|
722 char name[256];
|
|
|
723 err = name_for_methodOop(J, vf->methodOop, name, 256);
|
|
|
724 CHECK_FAIL(err);
|
|
|
725 fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n",
|
|
|
726 name, vf->bci);
|
|
|
727 }
|
|
|
728
|
|
|
729 err = read_pointer(J, vf->methodOop + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
730 CHECK_FAIL(err);
|
|
|
731
|
|
|
732 vf->line = 0;
|
|
|
733 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_flags, &access_flags, sizeof(int8_t));
|
|
|
734 CHECK_FAIL(err);
|
|
|
735
|
|
|
736 if (!(access_flags & constMethodOopDesc_has_linenumber_table)) {
|
|
|
737 if (debug > 2)
|
|
|
738 fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n");
|
|
|
739 return PS_OK;
|
|
|
740 }
|
|
|
741
|
|
|
742 /* The line numbers are a short array of 2-tuples [start_pc, line_number].
|
|
|
743 * Not necessarily sorted and not necessarily one-to-one.
|
|
|
744 */
|
|
|
745
|
|
|
746 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_code_size, &code_size, SZ16);
|
|
|
747 CHECK_FAIL(err);
|
|
|
748
|
|
|
749 /* inlined_table_start() */
|
|
|
750 code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0;
|
|
|
751 buffer = constMethod + (uint64_t) SIZE_constMethodOopDesc + (uint64_t) code_size + code_end_delta;
|
|
|
752
|
|
|
753 if (debug > 2) {
|
|
|
754 fprintf(stderr, "\t\t line_number_from_bci: methodOop: %#llx, native: %d\n",
|
|
|
755 vf->methodOop, (access_flags & AccessFlags_NATIVE));
|
|
|
756 fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n",
|
|
|
757 buffer, (int) code_size);
|
|
|
758 }
|
|
|
759
|
|
|
760 while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) {
|
|
|
761 if (stream_bci == vf->bci) {
|
|
|
762 /* perfect match */
|
|
|
763 if (debug > 2)
|
|
|
764 fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line);
|
|
|
765 vf->line = stream_line;
|
|
|
766 return PS_OK;
|
|
|
767 } else {
|
|
|
768 /* update best_bci/line */
|
|
|
769 if (stream_bci < vf->bci && stream_bci >= best_bci) {
|
|
|
770 best_bci = stream_bci;
|
|
|
771 vf->line = stream_line;
|
|
|
772 if (debug > 2) {
|
|
|
773 fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n",
|
|
|
774 best_bci, vf->line);
|
|
|
775 }
|
|
|
776 }
|
|
|
777 }
|
|
|
778 }
|
|
|
779 if (debug > 2)
|
|
|
780 fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line);
|
|
|
781 return PS_OK;
|
|
|
782
|
|
|
783 fail:
|
|
|
784 if (debug)
|
|
|
785 fprintf(stderr, "\t line_number_from_bci: FAIL\n");
|
|
|
786 return err;
|
|
|
787 }
|
|
|
788
|
|
|
789 static int
|
|
|
790 get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc)
|
|
|
791 {
|
|
|
792 int32_t pc_offset;
|
|
|
793 int32_t err;
|
|
|
794
|
|
|
795 err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32);
|
|
|
796 CHECK_FAIL(err);
|
|
|
797
|
|
|
798 *real_pc = N->nm + N->instrs_beg + pc_offset;
|
|
|
799 if (debug > 2) {
|
|
|
800 fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n",
|
|
|
801 pc_offset, *real_pc);
|
|
|
802 }
|
|
|
803 return PS_OK;
|
|
|
804
|
|
|
805 fail:
|
|
|
806 return err;
|
|
|
807 }
|
|
|
808
|
|
|
809 /* Finds a PcDesc with real-pc equal to N->pc */
|
|
|
810 static int pc_desc_at(Nmethod_t *N)
|
|
|
811 {
|
|
|
812 uint64_t pc_diff;
|
|
|
813 int32_t offs;
|
|
|
814 int32_t err;
|
|
|
815
|
|
|
816 if (debug > 2)
|
|
|
817 fprintf(stderr, "\t pc_desc_at: BEGIN\n");
|
|
|
818
|
|
|
819 N->vf_cnt = 0;
|
|
|
820 N->pc_desc = 0;
|
|
|
821
|
|
|
822 for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) {
|
|
|
823 uint64_t pd;
|
|
|
824 uint64_t best_pc_diff = 16; /* some approximation */
|
|
|
825 uint64_t real_pc = 0;
|
|
|
826
|
|
|
827 pd = N->nm + offs;
|
|
|
828 err = get_real_pc(N, pd, &real_pc);
|
|
|
829 CHECK_FAIL(err);
|
|
|
830
|
|
|
831 pc_diff = real_pc - N->pc;
|
|
|
832
|
|
|
833 /* In general, this fragment should work */
|
|
|
834 if (pc_diff == 0) {
|
|
|
835 N->pc_desc = pd;
|
|
|
836 if (debug) {
|
|
|
837 fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd);
|
|
|
838 }
|
|
|
839 return PS_OK;
|
|
|
840 }
|
|
|
841 /* This fragment is to be able to find out an appropriate
|
|
|
842 * pc_desc entry even if pc_desc info is inaccurate.
|
|
|
843 */
|
|
|
844 if (best_pc_diff > pc_diff && pc_diff > 0) {
|
|
|
845 best_pc_diff = pc_diff;
|
|
|
846 N->pc_desc = pd;
|
|
|
847 }
|
|
|
848 }
|
|
|
849 if (debug) {
|
|
|
850 fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND");
|
|
|
851 if (pc_diff < 20)
|
|
|
852 fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff);
|
|
|
853 else
|
|
|
854 fprintf(stderr, "\n\n");
|
|
|
855 }
|
|
|
856 return PS_OK;
|
|
|
857
|
|
|
858 fail:
|
|
|
859 return err;
|
|
|
860 }
|
|
|
861
|
|
|
862 static int
|
|
|
863 scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf)
|
|
|
864 {
|
|
|
865 uint64_t buffer;
|
|
|
866 int32_t err;
|
|
|
867
|
|
|
868 if (debug > 2) {
|
|
|
869 fprintf(stderr, "\t\t scope_desc_at: BEGIN \n");
|
|
|
870 }
|
|
|
871
|
|
|
872 buffer = N->nm + N->scopes_data_beg + decode_offset;
|
|
|
873
|
|
|
874 err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset);
|
|
|
875 CHECK_FAIL(err);
|
|
|
876
|
|
|
877 err = raw_read_int(N->J, &buffer, &vf->methodIdx);
|
|
|
878 CHECK_FAIL(err);
|
|
|
879
|
|
|
880 err = raw_read_int(N->J, &buffer, &vf->bci);
|
|
|
881 CHECK_FAIL(err);
|
|
|
882
|
|
|
883 if (debug > 2) {
|
|
|
884 fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n",
|
|
|
885 vf->sender_decode_offset);
|
|
|
886 fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx);
|
|
|
887 fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci);
|
|
|
888
|
|
|
889 fprintf(stderr, "\t\t scope_desc_at: END \n\n");
|
|
|
890 }
|
|
|
891 return PS_OK;
|
|
|
892
|
|
|
893 fail:
|
|
|
894 return err;
|
|
|
895 }
|
|
|
896
|
|
|
897 static int
|
|
|
898 scopeDesc_chain(Nmethod_t *N)
|
|
|
899 {
|
|
|
900 int32_t decode_offset = 0;
|
|
|
901 int32_t err;
|
|
|
902
|
|
|
903 if (debug > 2)
|
|
|
904 fprintf(stderr, "\t scopeDesc_chain: BEGIN\n");
|
|
|
905
|
|
|
906 err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset,
|
|
|
907 &decode_offset, SZ32);
|
|
|
908 CHECK_FAIL(err);
|
|
|
909
|
|
|
910 while (decode_offset > 0) {
|
|
|
911 if (debug > 2)
|
|
|
912 fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset);
|
|
|
913
|
|
|
914 Vframe_t *vf = &N->vframes[N->vf_cnt];
|
|
|
915
|
|
|
916 err = scope_desc_at(N, decode_offset, vf);
|
|
|
917 CHECK_FAIL(err);
|
|
|
918
|
|
|
919 if (vf->methodIdx > N->oops_len) {
|
|
|
920 fprintf(stderr, "\t scopeDesc_chain: (methodIdx > oops_len) !\n");
|
|
|
921 return -1;
|
|
|
922 }
|
|
|
923 err = read_pointer(N->J, N->nm + N->oops_beg + (vf->methodIdx-1)*POINTER_SIZE,
|
|
|
924 &vf->methodOop);
|
|
|
925 CHECK_FAIL(err);
|
|
|
926
|
|
|
927 if (vf->methodOop) {
|
|
|
928 N->vf_cnt++;
|
|
|
929 err = line_number_from_bci(N->J, vf);
|
|
|
930 CHECK_FAIL(err);
|
|
|
931 if (debug > 2) {
|
|
|
932 fprintf(stderr, "\t scopeDesc_chain: methodOop: %#8llx, line: %ld\n",
|
|
|
933 vf->methodOop, vf->line);
|
|
|
934 }
|
|
|
935 }
|
|
|
936 decode_offset = vf->sender_decode_offset;
|
|
|
937 }
|
|
|
938 if (debug > 2)
|
|
|
939 fprintf(stderr, "\t scopeDesc_chain: END \n\n");
|
|
|
940 return PS_OK;
|
|
|
941
|
|
|
942 fail:
|
|
|
943 if (debug)
|
|
|
944 fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n");
|
|
|
945 return err;
|
|
|
946 }
|
|
|
947
|
|
|
948
|
|
|
949 static int
|
|
|
950 name_for_nmethod(jvm_agent_t* J,
|
|
|
951 uint64_t nm,
|
|
|
952 uint64_t pc,
|
|
|
953 uint64_t methodOop,
|
|
|
954 char *result,
|
|
|
955 size_t size,
|
|
|
956 Jframe_t *jframe
|
|
|
957 ) {
|
|
|
958 Nmethod_t *N;
|
|
|
959 Vframe_t *vf;
|
|
|
960 int32_t err;
|
|
|
961 int deoptimized = 0;
|
|
|
962
|
|
|
963 if (debug) {
|
|
|
964 fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc);
|
|
|
965 }
|
|
|
966 if (J->N == NULL) {
|
|
|
967 J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t));
|
|
|
968 }
|
|
|
969 memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */
|
|
|
970 N = J->N;
|
|
|
971 N->J = J;
|
|
|
972 N->nm = nm;
|
|
|
973 N->pc = pc;
|
|
|
974 N->jframe = jframe;
|
|
|
975
|
|
|
976 err = nmethod_info(N);
|
|
|
977 CHECK_FAIL(err);
|
|
|
978 if (debug) {
|
|
|
979 fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n",
|
|
|
980 pc, N->nm + N->deopt_beg);
|
|
|
981 }
|
|
|
982
|
|
|
983 /* check for a deoptimized frame */
|
|
|
984 if ( pc == N->nm + N->deopt_beg) {
|
|
|
985 uint64_t base;
|
|
|
986 if (debug) {
|
|
|
987 fprintf(stderr, "name_for_nmethod: found deoptimized frame\n");
|
|
|
988 }
|
|
|
989 if (J->prev_fr.sender_sp != 0) {
|
|
|
990 base = J->prev_fr.sender_sp + N->orig_pc_offset;
|
|
|
991 } else {
|
|
|
992 base = J->curr_fr.sp + N->orig_pc_offset;
|
|
|
993 }
|
|
|
994 err = read_pointer(J, base, &N->pc);
|
|
|
995 CHECK_FAIL(err);
|
|
|
996 if (debug) {
|
|
|
997 fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n",
|
|
|
998 pc, N->pc);
|
|
|
999 }
|
|
|
1000 deoptimized = 1;
|
|
|
1001 }
|
|
|
1002
|
|
|
1003 err = pc_desc_at(N);
|
|
|
1004 CHECK_FAIL(err);
|
|
|
1005
|
|
|
1006 if (N->pc_desc > 0) {
|
|
|
1007 jframe->locinf = 1;
|
|
|
1008 err = scopeDesc_chain(N);
|
|
|
1009 CHECK_FAIL(err);
|
|
|
1010 }
|
|
|
1011 result[0] = COMP_METHOD_SIGN;
|
|
|
1012 vf = &N->vframes[0];
|
|
|
1013 if (N->vf_cnt > 0) {
|
|
|
1014 jframe->vf_cnt = N->vf_cnt;
|
|
|
1015 jframe->bci = vf->bci;
|
|
|
1016 jframe->line = vf->line;
|
|
|
1017 err = name_for_methodOop(J, N->vframes[0].methodOop, result+1, size-1);
|
|
|
1018 CHECK_FAIL(err);
|
|
|
1019 } else {
|
|
|
1020 err = name_for_methodOop(J, methodOop, result+1, size-1);
|
|
|
1021 CHECK_FAIL(err);
|
|
|
1022 }
|
|
|
1023 if (deoptimized) {
|
|
|
1024 strncat(result + 1, " [deoptimized frame]; ", size-1);
|
|
|
1025 } else {
|
|
|
1026 strncat(result + 1, " [compiled] ", size-1);
|
|
|
1027 }
|
|
|
1028 if (debug)
|
|
|
1029 fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n",
|
|
|
1030 result, N->vf_cnt);
|
|
|
1031 return PS_OK;
|
|
|
1032
|
|
|
1033 fail:
|
|
|
1034 if (debug)
|
|
|
1035 fprintf(stderr, "name_for_nmethod: FAIL \n\n");
|
|
|
1036 return err;
|
|
|
1037 }
|
|
|
1038
|
|
|
1039 int is_bci(intptr_t bcx) {
|
|
|
1040 switch (DATA_MODEL) {
|
|
|
1041 case PR_MODEL_LP64:
|
|
|
1042 return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ;
|
|
|
1043 case PR_MODEL_ILP32:
|
|
|
1044 default:
|
|
|
1045 return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE;
|
|
|
1046 }
|
|
|
1047 }
|
|
|
1048
|
|
|
1049 static int
|
|
|
1050 name_for_imethod(jvm_agent_t* J,
|
|
|
1051 uint64_t bcx,
|
|
|
1052 uint64_t methodOop,
|
|
|
1053 char *result,
|
|
|
1054 size_t size,
|
|
|
1055 Jframe_t *jframe
|
|
|
1056 ) {
|
|
|
1057 uint64_t bci;
|
|
|
1058 uint64_t constMethod;
|
|
|
1059 Vframe_t vframe = {0};
|
|
|
1060 Vframe_t *vf = &vframe;
|
|
|
1061 int32_t err;
|
|
|
1062
|
|
|
1063 err = read_pointer(J, methodOop + OFFSET_methodOopDesc_constMethod, &constMethod);
|
|
|
1064 CHECK_FAIL(err);
|
|
|
1065
|
|
|
1066 bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_constMethodOopDesc);
|
|
|
1067
|
|
|
1068 if (debug)
|
|
|
1069 fprintf(stderr, "\t name_for_imethod: BEGIN: methodOop: %#llx\n", methodOop);
|
|
|
1070
|
|
|
1071 err = name_for_methodOop(J, methodOop, result, size);
|
|
|
1072 CHECK_FAIL(err);
|
|
|
1073 if (debug)
|
|
|
1074 fprintf(stderr, "\t name_for_imethod: method name: %s\n", result);
|
|
|
1075
|
|
|
1076 if (bci > 0) {
|
|
|
1077 vf->methodOop = methodOop;
|
|
|
1078 vf->bci = bci;
|
|
|
1079 err = line_number_from_bci(J, vf);
|
|
|
1080 CHECK_FAIL(err);
|
|
|
1081 }
|
|
|
1082 jframe->bci = vf->bci;
|
|
|
1083 jframe->line = vf->line;
|
|
|
1084 jframe->locinf = 1;
|
|
|
1085
|
|
|
1086 if (debug) {
|
|
|
1087 fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n",
|
|
|
1088 vf->bci, vf->line);
|
|
|
1089 }
|
|
|
1090 return PS_OK;
|
|
|
1091
|
|
|
1092 fail:
|
|
|
1093 if (debug)
|
|
|
1094 fprintf(stderr, "\t name_for_imethod: FAIL\n");
|
|
|
1095 return err;
|
|
|
1096 }
|
|
|
1097
|
|
|
1098 static int
|
|
|
1099 name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result,
|
|
|
1100 size_t size, Jframe_t *jframe, int* is_interpreted)
|
|
|
1101 {
|
|
|
1102 uint64_t start;
|
|
|
1103 uint64_t vtbl;
|
|
|
1104 int32_t err;
|
|
|
1105 *is_interpreted = 0;
|
|
|
1106
|
|
|
1107 result[0] = '\0';
|
|
|
1108
|
|
|
1109 err = find_start(J, pc, &start);
|
|
|
1110 CHECK_FAIL(err);
|
|
|
1111
|
|
|
1112 err = read_pointer(J, start, &vtbl);
|
|
|
1113 CHECK_FAIL(err);
|
|
|
1114
|
|
|
1115 if (vtbl == J->nmethod_vtbl) {
|
|
|
1116 uint64_t methodOop;
|
|
|
1117
|
|
|
1118 err = read_pointer(J, start + OFFSET_nmethod_method, &methodOop);
|
|
|
1119 CHECK_FAIL(err);
|
|
|
1120
|
|
|
1121 if (debug) {
|
|
|
1122 fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, methodOop: %#8llx \n",
|
|
|
1123 start, pc, methodOop);
|
|
|
1124 }
|
|
|
1125 err = name_for_nmethod(J, start, pc, methodOop, result, size, jframe);
|
|
|
1126 CHECK_FAIL(err);
|
|
|
1127 } else if (vtbl == J->BufferBlob_vtbl) {
|
|
|
1128 const char * name;
|
|
|
1129
|
|
|
1130 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name);
|
|
|
1131
|
|
|
1132 /*
|
|
|
1133 * Temporary usage of string "Interpreter".
|
|
|
1134 * We need some other way to distinguish "StubRoutines"
|
|
|
1135 * and regular interpreted frames.
|
|
|
1136 */
|
|
|
1137 if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) {
|
|
|
1138 *is_interpreted = 1;
|
|
|
1139 if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1140 return name_for_imethod(J, J->bcx, J->methodOopPtr, result, size, jframe);
|
|
|
1141 }
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 if (err == PS_OK) {
|
|
|
1145 strncpy(result, name, size);
|
|
|
1146 free((void*)name);
|
|
|
1147 } else {
|
|
|
1148 strncpy(result, "<unknown BufferBlob>", size);
|
|
|
1149 }
|
|
|
1150 /* return PS_OK; */
|
|
|
1151 } else {
|
|
|
1152 const char * name;
|
|
|
1153
|
|
|
1154 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name);
|
|
|
1155 if (err == PS_OK) {
|
|
|
1156 strncpy(result, name, size);
|
|
|
1157 free((void*)name);
|
|
|
1158 } else {
|
|
|
1159 strncpy(result, "<unknown CodeBlob>", size);
|
|
|
1160 WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl);
|
|
|
1161 }
|
|
|
1162 }
|
|
|
1163 result[size-1] = '\0';
|
|
|
1164
|
|
|
1165 #ifdef X86_COMPILER2
|
|
|
1166 if (vtbl != J->RuntimeStub_vtbl) {
|
|
|
1167 uint64_t trial_pc;
|
|
|
1168 int frame_size;
|
|
|
1169 err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size,
|
|
|
1170 &frame_size, SZ32);
|
|
|
1171 CHECK_FAIL(err);
|
|
|
1172
|
|
|
1173 // frame_size is in words, we want bytes.
|
|
|
1174 frame_size *= POINTER_SIZE; /* word => byte conversion */
|
|
|
1175
|
|
|
1176 /*
|
|
|
1177 Because c2 doesn't use FP as a framepointer the value of sp/fp we receive
|
|
|
1178 in the initial entry to a set of stack frames containing server frames
|
|
|
1179 will pretty much be nonsense. We can detect that nonsense by looking to
|
|
|
1180 see if the PC we received is correct if we look at the expected storage
|
|
|
1181 location in relation to the FP (ie. POINTER_SIZE(FP) )
|
|
|
1182 */
|
|
|
1183
|
|
|
1184 err = read_pointer(J, fp + POINTER_SIZE , &trial_pc);
|
|
|
1185 if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) {
|
|
|
1186 // Either we couldn't even read at the "fp" or the pc didn't match
|
|
|
1187 // both are sure clues that the fp is bogus. We no search the stack
|
|
|
1188 // for a reasonable number of words trying to find the bogus fp
|
|
|
1189 // and the current pc in adjacent words. The we will be able to
|
|
|
1190 // deduce an approximation of the frame pointer and actually get
|
|
|
1191 // the correct stack pointer. Which we can then unwind for the
|
|
|
1192 // next frame.
|
|
|
1193 int i;
|
|
|
1194 uint64_t check;
|
|
|
1195 uint64_t base = J->curr_fr.sp;
|
|
|
1196 uint64_t prev_fp = 0;
|
|
|
1197 for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) {
|
|
|
1198 err = read_pointer(J, base , &check);
|
|
|
1199 CHECK_FAIL(err);
|
|
|
1200 if (check == fp) {
|
|
|
1201 base += POINTER_SIZE;
|
|
|
1202 err = read_pointer(J, base , &check);
|
|
|
1203 CHECK_FAIL(err);
|
|
|
1204 if (check == pc) {
|
|
|
1205 if (debug) {
|
|
|
1206 fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE);
|
|
|
1207 }
|
|
|
1208 prev_fp = base - 2 * POINTER_SIZE;
|
|
|
1209 break;
|
|
|
1210 }
|
|
|
1211 }
|
|
|
1212 }
|
|
|
1213 if ( prev_fp != 0 ) {
|
|
|
1214 // real_sp is the sp we should have received for this frame
|
|
|
1215 uint64_t real_sp = prev_fp + 2 * POINTER_SIZE;
|
|
|
1216 // +POINTER_SIZE because callee owns the return address so caller's sp is +1 word
|
|
|
1217 jframe->new_sp = real_sp + frame_size + POINTER_SIZE;
|
|
|
1218 err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc);
|
|
|
1219 CHECK_FAIL(err);
|
|
|
1220 err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp);
|
|
|
1221 CHECK_FAIL(err);
|
|
|
1222 return PS_OK;
|
|
|
1223 }
|
|
|
1224 }
|
|
|
1225
|
|
|
1226 /* A prototype to workaround FP absence */
|
|
|
1227 /*
|
|
|
1228 * frame_size can be 0 for StubRoutines (1) frame.
|
|
|
1229 * In this case it should work with fp as usual.
|
|
|
1230 */
|
|
|
1231 if (frame_size > 0) {
|
|
|
1232 jframe->new_fp = J->prev_fr.fp + frame_size;
|
|
|
1233 jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE;
|
|
|
1234 } else {
|
|
|
1235 memset(&J->curr_fr, 0, sizeof(Frame_t));
|
|
|
1236 err = read_pointer(J, fp, &jframe->new_fp);
|
|
|
1237 CHECK_FAIL(err);
|
|
|
1238
|
|
|
1239 err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc);
|
|
|
1240 CHECK_FAIL(err);
|
|
|
1241 }
|
|
|
1242 if (debug) {
|
|
|
1243 fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n",
|
|
|
1244 result, frame_size);
|
|
|
1245 fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n",
|
|
|
1246 J->prev_fr.fp, jframe->new_fp);
|
|
|
1247 }
|
|
|
1248 }
|
|
|
1249 #endif /* X86_COMPILER2 */
|
|
|
1250
|
|
|
1251 return PS_OK;
|
|
|
1252
|
|
|
1253 fail:
|
|
|
1254 return err;
|
|
|
1255 }
|
|
|
1256
|
|
|
1257 int Jget_vframe(jvm_agent_t* J, int vframe_no,
|
|
|
1258 char *name, size_t size, Jframe_t *jframe)
|
|
|
1259 {
|
|
|
1260 Nmethod_t *N = J->N;
|
|
|
1261 Vframe_t *vf;
|
|
|
1262 int32_t err;
|
|
|
1263
|
|
|
1264 if (vframe_no >= N->vf_cnt) {
|
|
|
1265 (void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no);
|
|
|
1266 return -1;
|
|
|
1267 }
|
|
|
1268 vf = N->vframes + vframe_no;
|
|
|
1269 name[0] = COMP_METHOD_SIGN;
|
|
|
1270 err = name_for_methodOop(J, vf->methodOop, name + 1, size);
|
|
|
1271 CHECK_FAIL(err);
|
|
|
1272
|
|
|
1273 jframe->bci = vf->bci;
|
|
|
1274 jframe->line = vf->line;
|
|
|
1275 if (debug) {
|
|
|
1276 fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n",
|
|
|
1277 name, vf->line);
|
|
|
1278 }
|
|
|
1279 return PS_OK;
|
|
|
1280
|
|
|
1281 fail:
|
|
|
1282 if (debug) {
|
|
|
1283 fprintf(stderr, "\t Jget_vframe: FAIL\n");
|
|
|
1284 }
|
|
|
1285 return err;
|
|
|
1286 }
|
|
|
1287
|
|
|
1288 #define MAX_SYM_SIZE 256
|
|
|
1289
|
|
|
1290 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name,
|
|
|
1291 size_t size, Jframe_t *jframe) {
|
|
|
1292 uintptr_t fp;
|
|
|
1293 uintptr_t pc;
|
|
|
1294 /* arguments given to read_pointer need to be worst case sized */
|
|
|
1295 uint64_t methodOopPtr = 0;
|
|
|
1296 uint64_t sender_sp;
|
|
|
1297 uint64_t bcx = 0;
|
|
|
1298 int is_interpreted = 0;
|
|
|
1299 int result = PS_OK;
|
|
|
1300 int err = PS_OK;
|
|
|
1301
|
|
|
1302 if (J == NULL) {
|
|
|
1303 return -1;
|
|
|
1304 }
|
|
|
1305
|
|
|
1306 jframe->vf_cnt = 1;
|
|
|
1307 jframe->new_fp = 0;
|
|
|
1308 jframe->new_pc = 0;
|
|
|
1309 jframe->line = 0;
|
|
|
1310 jframe->bci = 0;
|
|
|
1311 jframe->locinf = 0;
|
|
|
1312
|
|
|
1313 read_volatiles(J);
|
|
|
1314 pc = (uintptr_t) regs[R_PC];
|
|
|
1315 J->curr_fr.pc = pc;
|
|
|
1316 J->curr_fr.fp = regs[R_FP];
|
|
|
1317 J->curr_fr.sp = regs[R_SP];
|
|
|
1318
|
|
|
1319 if (debug)
|
|
|
1320 fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc);
|
|
|
1321
|
|
|
1322 #if defined(sparc) || defined(__sparc)
|
|
|
1323 /* The following workaround is for SPARC. CALL instruction occupates 8 bytes.
|
|
|
1324 * In the pcDesc structure return pc offset is recorded for CALL instructions.
|
|
|
1325 * regs[R_PC] contains a CALL instruction pc offset.
|
|
|
1326 */
|
|
|
1327 pc += 8;
|
|
|
1328 bcx = (uintptr_t) regs[R_L1];
|
|
|
1329 methodOopPtr = (uintptr_t) regs[R_L2];
|
|
|
1330 sender_sp = regs[R_I5];
|
|
|
1331 if (debug > 2) {
|
|
|
1332 fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n",
|
|
|
1333 regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]);
|
|
|
1334 }
|
|
|
1335 #elif defined(i386) || defined(__i386) || defined(__amd64)
|
|
|
1336
|
|
|
1337 fp = (uintptr_t) regs[R_FP];
|
|
|
1338 if (J->prev_fr.fp == 0) {
|
|
|
1339 #ifdef X86_COMPILER2
|
|
|
1340 /* A workaround for top java frames */
|
|
|
1341 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE);
|
|
|
1342 #else
|
|
|
1343 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE);
|
|
|
1344 #endif /* COMPILER2 */
|
|
|
1345 }
|
|
|
1346 if (debug > 2) {
|
|
|
1347 printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp);
|
|
|
1348 }
|
|
|
1349
|
|
|
1350 if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodOopPtr) != PS_OK) {
|
|
|
1351 methodOopPtr = 0;
|
|
|
1352 }
|
|
|
1353 if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) {
|
|
|
1354 sender_sp = 0;
|
|
|
1355 }
|
|
|
1356 if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) {
|
|
|
1357 bcx = 0;
|
|
|
1358 }
|
|
|
1359 #endif /* i386 */
|
|
|
1360
|
|
|
1361 J->methodOopPtr = methodOopPtr;
|
|
|
1362 J->bcx = bcx;
|
|
|
1363
|
|
|
1364 /* On x86 with C2 JVM: native frame may have wrong regs[R_FP]
|
|
|
1365 * For example: JVM_SuspendThread frame poins to the top interpreted frame.
|
|
|
1366 * If we call is_methodOop(J, methodOopPtr) before codecache_contains(J, pc)
|
|
|
1367 * then we go over and omit both: nmethod and I2CAdapter frames.
|
|
|
1368 * Note, that regs[R_PC] is always correct if frame defined correctly.
|
|
|
1369 * So it is better to call codecache_contains(J, pc) from the beginning.
|
|
|
1370 */
|
|
|
1371 #ifndef X86_COMPILER2
|
|
|
1372 if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1373 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe);
|
|
|
1374 /* If the methodOopPtr is a method then this is highly likely to be
|
|
|
1375 an interpreter frame */
|
|
|
1376 if (result >= 0) {
|
|
|
1377 is_interpreted = 1;
|
|
|
1378 }
|
|
|
1379 } else
|
|
|
1380 #endif /* ! X86_COMPILER2 */
|
|
|
1381
|
|
|
1382 if (codecache_contains(J, pc)) {
|
|
|
1383 result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted);
|
|
|
1384 }
|
|
|
1385 #ifdef X86_COMPILER2
|
|
|
1386 else if (is_methodOop(J, J->methodOopPtr)) {
|
|
|
1387 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe);
|
|
|
1388 /* If the methodOopPtr is a method then this is highly likely to be
|
|
|
1389 an interpreter frame */
|
|
|
1390 if (result >= 0) {
|
|
|
1391 is_interpreted = 1;
|
|
|
1392 }
|
|
|
1393 }
|
|
|
1394 #endif /* X86_COMPILER2 */
|
|
|
1395 else {
|
|
|
1396 if (debug) {
|
|
|
1397 fprintf(stderr, "Jlookup_by_regs: END with -1\n\n");
|
|
|
1398 }
|
|
|
1399 result = -1;
|
|
|
1400 }
|
|
|
1401 if (!is_interpreted) {
|
|
|
1402 sender_sp = 0;
|
|
|
1403 }
|
|
|
1404 J->curr_fr.sender_sp = sender_sp;
|
|
|
1405
|
|
|
1406 #ifdef X86_COMPILER2
|
|
|
1407 if (!J->curr_fr.fp) {
|
|
|
1408 J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP];
|
|
|
1409 }
|
|
|
1410 if (!jframe->new_pc && jframe->new_fp) {
|
|
|
1411 // This seems dubious
|
|
|
1412 read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc);
|
|
|
1413 CHECK_FAIL(err);
|
|
|
1414 if (debug > 2) {
|
|
|
1415 printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n",
|
|
|
1416 jframe->new_fp, jframe->new_pc);
|
|
|
1417 }
|
|
|
1418 }
|
|
|
1419
|
|
|
1420 #endif /* X86_COMPILER2 */
|
|
|
1421 J->prev_fr = J->curr_fr;
|
|
|
1422
|
|
|
1423 if (debug)
|
|
|
1424 fprintf(stderr, "Jlookup_by_regs: END\n\n");
|
|
|
1425
|
|
|
1426 return result;
|
|
|
1427
|
|
|
1428 fail:
|
|
|
1429 return err;
|
|
|
1430 }
|
|
|
1431
|
|
|
1432 void update_gregs(prgregset_t gregs, Jframe_t jframe) {
|
|
|
1433 #ifdef X86_COMPILER2
|
|
|
1434 if (debug > 0) {
|
|
|
1435 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]);
|
|
|
1436 }
|
|
|
1437 /*
|
|
|
1438 * A workaround for java C2 frames with unconventional FP.
|
|
|
1439 * may have to modify regset with new values for FP/PC/SP when needed.
|
|
|
1440 */
|
|
|
1441 if (jframe.new_sp) {
|
|
|
1442 *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp;
|
|
|
1443 } else {
|
|
|
1444 // *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE;
|
|
|
1445 }
|
|
|
1446
|
|
|
1447 if (jframe.new_fp) {
|
|
|
1448 *((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp;
|
|
|
1449 }
|
|
|
1450 if (jframe.new_pc) {
|
|
|
1451 *((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc;
|
|
|
1452 }
|
|
|
1453 if (debug > 0) {
|
|
|
1454 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]);
|
|
|
1455 }
|
|
|
1456 #endif /* X86_COMPILER2 */
|
|
|
1457 }
|
|
|
1458
|
|
|
1459 /*
|
|
|
1460 * Iterates over java frames at current location given by 'gregs'.
|
|
|
1461 *
|
|
|
1462 * Returns -1 if no java frames are present or if an error is encountered.
|
|
|
1463 * Returns the result of calling 'func' if the return value is non-zero.
|
|
|
1464 * Returns 0 otherwise.
|
|
|
1465 */
|
|
|
1466 int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) {
|
|
|
1467 char buf[MAX_SYM_SIZE + 1];
|
|
|
1468 Jframe_t jframe;
|
|
|
1469 int i = 0, res;
|
|
|
1470 #ifdef X86_COMPILER2
|
|
|
1471 if (debug > 0) {
|
|
|
1472 fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]);
|
|
|
1473 }
|
|
|
1474 #endif /* X86_COMPILER2 */
|
|
|
1475
|
|
|
1476 memset(&jframe, 0, sizeof(Jframe_t));
|
|
|
1477 memset(buf, 0, sizeof(buf));
|
|
|
1478 res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe);
|
|
|
1479 if (res != PS_OK)
|
|
|
1480 return (-1);
|
|
|
1481
|
|
|
1482
|
|
|
1483 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1,
|
|
|
1484 jframe.line, NULL);
|
|
|
1485 if (res != 0) {
|
|
|
1486 update_gregs(gregs, jframe);
|
|
|
1487 return (res);
|
|
|
1488 }
|
|
|
1489 for (i = 1; i < jframe.vf_cnt; i++) {
|
|
|
1490 Jget_vframe(J, i, buf, sizeof(buf), &jframe);
|
|
|
1491 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1,
|
|
|
1492 jframe.line, NULL);
|
|
|
1493 if (res != 0) {
|
|
|
1494 update_gregs(gregs, jframe);
|
|
|
1495 return (res);
|
|
|
1496 }
|
|
|
1497 }
|
|
|
1498 update_gregs(gregs, jframe);
|
|
|
1499 return (0);
|
|
|
1500 }
|
