J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of Sun Microsystems nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <agent_util.h> |
| 33 | |
| 34 | /* ------------------------------------------------------------------- */ |
| 35 | /* Generic C utility functions */ |
| 36 | |
| 37 | /* Send message to stdout or whatever the data output location is */ |
| 38 | void |
| 39 | stdout_message(const char * format, ...) |
| 40 | { |
| 41 | va_list ap; |
| 42 | |
| 43 | va_start(ap, format); |
| 44 | (void)vfprintf(stdout, format, ap); |
| 45 | va_end(ap); |
| 46 | } |
| 47 | |
| 48 | /* Send message to stderr or whatever the error output location is and exit */ |
| 49 | void |
| 50 | fatal_error(const char * format, ...) |
| 51 | { |
| 52 | va_list ap; |
| 53 | |
| 54 | va_start(ap, format); |
| 55 | (void)vfprintf(stderr, format, ap); |
| 56 | (void)fflush(stderr); |
| 57 | va_end(ap); |
| 58 | exit(3); |
| 59 | } |
| 60 | |
| 61 | /* Get a token from a string (strtok is not MT-safe) |
| 62 | * str String to scan |
| 63 | * seps Separation characters |
| 64 | * buf Place to put results |
| 65 | * max Size of buf |
| 66 | * Returns NULL if no token available or can't do the scan. |
| 67 | */ |
| 68 | char * |
| 69 | get_token(char *str, char *seps, char *buf, int max) |
| 70 | { |
| 71 | int len; |
| 72 | |
| 73 | buf[0] = 0; |
| 74 | if ( str==NULL || str[0]==0 ) { |
| 75 | return NULL; |
| 76 | } |
| 77 | str += strspn(str, seps); |
| 78 | if ( str[0]==0 ) { |
| 79 | return NULL; |
| 80 | } |
| 81 | len = (int)strcspn(str, seps); |
| 82 | if ( len >= max ) { |
| 83 | return NULL; |
| 84 | } |
| 85 | (void)strncpy(buf, str, len); |
| 86 | buf[len] = 0; |
| 87 | return str+len; |
| 88 | } |
| 89 | |
| 90 | /* Determines if a class/method is specified by a list item |
| 91 | * item String that represents a pattern to match |
| 92 | * If it starts with a '*', then any class is allowed |
| 93 | * If it ends with a '*', then any method is allowed |
| 94 | * cname Class name, e.g. "java.lang.Object" |
| 95 | * mname Method name, e.g. "<init>" |
| 96 | * Returns 1(true) or 0(false). |
| 97 | */ |
| 98 | static int |
| 99 | covered_by_list_item(char *item, char *cname, char *mname) |
| 100 | { |
| 101 | int len; |
| 102 | |
| 103 | len = (int)strlen(item); |
| 104 | if ( item[0]=='*' ) { |
| 105 | if ( strncmp(mname, item+1, len-1)==0 ) { |
| 106 | return 1; |
| 107 | } |
| 108 | } else if ( item[len-1]=='*' ) { |
| 109 | if ( strncmp(cname, item, len-1)==0 ) { |
| 110 | return 1; |
| 111 | } |
| 112 | } else { |
| 113 | int cname_len; |
| 114 | |
| 115 | cname_len = (int)strlen(cname); |
| 116 | if ( strncmp(cname, item, (len>cname_len?cname_len:len))==0 ) { |
| 117 | if ( cname_len >= len ) { |
| 118 | /* No method name supplied in item, we must have matched */ |
| 119 | return 1; |
| 120 | } else { |
| 121 | int mname_len; |
| 122 | |
| 123 | mname_len = (int)strlen(mname); |
| 124 | item += cname_len+1; |
| 125 | len -= cname_len+1; |
| 126 | if ( strncmp(mname, item, (len>mname_len?mname_len:len))==0 ) { |
| 127 | return 1; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | /* Determines if a class/method is specified by this list |
| 136 | * list String of comma separated pattern items |
| 137 | * cname Class name, e.g. "java.lang.Object" |
| 138 | * mname Method name, e.g. "<init>" |
| 139 | * Returns 1(true) or 0(false). |
| 140 | */ |
| 141 | static int |
| 142 | covered_by_list(char *list, char *cname, char *mname) |
| 143 | { |
| 144 | char token[1024]; |
| 145 | char *next; |
| 146 | |
| 147 | if ( list[0] == 0 ) { |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | next = get_token(list, ",", token, sizeof(token)); |
| 152 | while ( next != NULL ) { |
| 153 | if ( covered_by_list_item(token, cname, mname) ) { |
| 154 | return 1; |
| 155 | } |
| 156 | next = get_token(next, ",", token, sizeof(token)); |
| 157 | } |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | /* Determines which class and methods we are interested in |
| 162 | * cname Class name, e.g. "java.lang.Object" |
| 163 | * mname Method name, e.g. "<init>" |
| 164 | * include_list Empty or an explicit list for inclusion |
| 165 | * exclude_list Empty or an explicit list for exclusion |
| 166 | * Returns 1(true) or 0(false). |
| 167 | */ |
| 168 | int |
| 169 | interested(char *cname, char *mname, char *include_list, char *exclude_list) |
| 170 | { |
| 171 | if ( exclude_list!=NULL && exclude_list[0]!=0 && |
| 172 | covered_by_list(exclude_list, cname, mname) ) { |
| 173 | return 0; |
| 174 | } |
| 175 | if ( include_list!=NULL && include_list[0]!=0 && |
| 176 | !covered_by_list(include_list, cname, mname) ) { |
| 177 | return 0; |
| 178 | } |
| 179 | return 1; |
| 180 | } |
| 181 | |
| 182 | /* ------------------------------------------------------------------- */ |
| 183 | /* Generic JVMTI utility functions */ |
| 184 | |
| 185 | /* Every JVMTI interface returns an error code, which should be checked |
| 186 | * to avoid any cascading errors down the line. |
| 187 | * The interface GetErrorName() returns the actual enumeration constant |
| 188 | * name, making the error messages much easier to understand. |
| 189 | */ |
| 190 | void |
| 191 | check_jvmti_error(jvmtiEnv *jvmti, jvmtiError errnum, const char *str) |
| 192 | { |
| 193 | if ( errnum != JVMTI_ERROR_NONE ) { |
| 194 | char *errnum_str; |
| 195 | |
| 196 | errnum_str = NULL; |
| 197 | (void)(*jvmti)->GetErrorName(jvmti, errnum, &errnum_str); |
| 198 | |
| 199 | fatal_error("ERROR: JVMTI: %d(%s): %s\n", errnum, |
| 200 | (errnum_str==NULL?"Unknown":errnum_str), |
| 201 | (str==NULL?"":str)); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /* All memory allocated by JVMTI must be freed by the JVMTI Deallocate |
| 206 | * interface. |
| 207 | */ |
| 208 | void |
| 209 | deallocate(jvmtiEnv *jvmti, void *ptr) |
| 210 | { |
| 211 | jvmtiError error; |
| 212 | |
| 213 | error = (*jvmti)->Deallocate(jvmti, ptr); |
| 214 | check_jvmti_error(jvmti, error, "Cannot deallocate memory"); |
| 215 | } |
| 216 | |
| 217 | /* Allocation of JVMTI managed memory */ |
| 218 | void * |
| 219 | allocate(jvmtiEnv *jvmti, jint len) |
| 220 | { |
| 221 | jvmtiError error; |
| 222 | void *ptr; |
| 223 | |
| 224 | error = (*jvmti)->Allocate(jvmti, len, (unsigned char **)&ptr); |
| 225 | check_jvmti_error(jvmti, error, "Cannot allocate memory"); |
| 226 | return ptr; |
| 227 | } |
| 228 | |
| 229 | /* Add demo jar file to boot class path (the BCI Tracker class must be |
| 230 | * in the boot classpath) |
| 231 | * |
| 232 | * WARNING: This code assumes that the jar file can be found at one of: |
| 233 | * ${JAVA_HOME}/demo/jvmti/${DEMO_NAME}/${DEMO_NAME}.jar |
| 234 | * ${JAVA_HOME}/../demo/jvmti/${DEMO_NAME}/${DEMO_NAME}.jar |
| 235 | * where JAVA_HOME may refer to the jre directory. |
| 236 | * Both these values are added to the boot classpath. |
| 237 | * These locations are only true for these demos, installed |
| 238 | * in the JDK area. Platform specific code could be used to |
| 239 | * find the location of the DLL or .so library, and construct a |
| 240 | * path name to the jar file, relative to the library location. |
| 241 | */ |
| 242 | void |
| 243 | add_demo_jar_to_bootclasspath(jvmtiEnv *jvmti, char *demo_name) |
| 244 | { |
| 245 | jvmtiError error; |
| 246 | char *file_sep; |
| 247 | int max_len; |
| 248 | char *java_home; |
| 249 | char jar_path[FILENAME_MAX+1]; |
| 250 | |
| 251 | java_home = NULL; |
| 252 | error = (*jvmti)->GetSystemProperty(jvmti, "java.home", &java_home); |
| 253 | check_jvmti_error(jvmti, error, "Cannot get java.home property value"); |
| 254 | if ( java_home == NULL || java_home[0] == 0 ) { |
| 255 | fatal_error("ERROR: Java home not found\n"); |
| 256 | } |
| 257 | |
| 258 | #ifdef WIN32 |
| 259 | file_sep = "\\"; |
| 260 | #else |
| 261 | file_sep = "/"; |
| 262 | #endif |
| 263 | |
| 264 | max_len = (int)(strlen(java_home) + strlen(demo_name)*2 + |
| 265 | strlen(file_sep)*5 + |
| 266 | 16 /* ".." "demo" "jvmti" ".jar" NULL */ ); |
| 267 | if ( max_len > (int)sizeof(jar_path) ) { |
| 268 | fatal_error("ERROR: Path to jar file too long\n"); |
| 269 | } |
| 270 | (void)strcpy(jar_path, java_home); |
| 271 | (void)strcat(jar_path, file_sep); |
| 272 | (void)strcat(jar_path, "demo"); |
| 273 | (void)strcat(jar_path, file_sep); |
| 274 | (void)strcat(jar_path, "jvmti"); |
| 275 | (void)strcat(jar_path, file_sep); |
| 276 | (void)strcat(jar_path, demo_name); |
| 277 | (void)strcat(jar_path, file_sep); |
| 278 | (void)strcat(jar_path, demo_name); |
| 279 | (void)strcat(jar_path, ".jar"); |
| 280 | error = (*jvmti)->AddToBootstrapClassLoaderSearch(jvmti, (const char*)jar_path); |
| 281 | check_jvmti_error(jvmti, error, "Cannot add to boot classpath"); |
| 282 | |
| 283 | (void)strcpy(jar_path, java_home); |
| 284 | (void)strcat(jar_path, file_sep); |
| 285 | (void)strcat(jar_path, ".."); |
| 286 | (void)strcat(jar_path, file_sep); |
| 287 | (void)strcat(jar_path, "demo"); |
| 288 | (void)strcat(jar_path, file_sep); |
| 289 | (void)strcat(jar_path, "jvmti"); |
| 290 | (void)strcat(jar_path, file_sep); |
| 291 | (void)strcat(jar_path, demo_name); |
| 292 | (void)strcat(jar_path, file_sep); |
| 293 | (void)strcat(jar_path, demo_name); |
| 294 | (void)strcat(jar_path, ".jar"); |
| 295 | |
| 296 | error = (*jvmti)->AddToBootstrapClassLoaderSearch(jvmti, (const char*)jar_path); |
| 297 | check_jvmti_error(jvmti, error, "Cannot add to boot classpath"); |
| 298 | } |
| 299 | |
| 300 | /* ------------------------------------------------------------------- */ |