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comparison agent/src/os/linux/ps_core.c @ 10229:f6a055fcf47d

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8005038: remove crufty '_g' support from SA Reviewed-by: coleenp, mgronlun, rbackman
author sla
date Tue, 07 May 2013 14:33:09 +0200
parents 255c0a4cb4eb
children 1f42d3ec1759
comparison
equal deleted inserted replaced
10228:b5fef8013a95 10229:f6a055fcf47d
193 } 193 }
194 194
195 //--------------------------------------------------------------- 195 //---------------------------------------------------------------
196 // Part of the class sharing workaround: 196 // Part of the class sharing workaround:
197 // 197 //
198 // With class sharing, pages are mapped from classes[_g].jsa file. 198 // With class sharing, pages are mapped from classes.jsa file.
199 // The read-only class sharing pages are mapped as MAP_SHARED, 199 // The read-only class sharing pages are mapped as MAP_SHARED,
200 // PROT_READ pages. These pages are not dumped into core dump. 200 // PROT_READ pages. These pages are not dumped into core dump.
201 // With this workaround, these pages are read from classes[_g].jsa. 201 // With this workaround, these pages are read from classes.jsa.
202 202
203 // FIXME: !HACK ALERT! 203 // FIXME: !HACK ALERT!
204 // The format of sharing achive file header is needed to read shared heap 204 // The format of sharing achive file header is needed to read shared heap
205 // file mappings. For now, I am hard coding portion of FileMapHeader here. 205 // file mappings. For now, I am hard coding portion of FileMapHeader here.
206 // Refer to filemap.hpp. 206 // Refer to filemap.hpp.
282 282
283 static bool init_classsharing_workaround(struct ps_prochandle* ph) { 283 static bool init_classsharing_workaround(struct ps_prochandle* ph) {
284 lib_info* lib = ph->libs; 284 lib_info* lib = ph->libs;
285 while (lib != NULL) { 285 while (lib != NULL) {
286 // we are iterating over shared objects from the core dump. look for 286 // we are iterating over shared objects from the core dump. look for
287 // libjvm[_g].so. 287 // libjvm.so.
288 const char *jvm_name = 0; 288 const char *jvm_name = 0;
289 if ((jvm_name = strstr(lib->name, "/libjvm.so")) != 0 || 289 if ((jvm_name = strstr(lib->name, "/libjvm.so")) != 0) {
290 (jvm_name = strstr(lib->name, "/libjvm_g.so")) != 0) {
291 char classes_jsa[PATH_MAX]; 290 char classes_jsa[PATH_MAX];
292 struct FileMapHeader header; 291 struct FileMapHeader header;
293 size_t n = 0; 292 size_t n = 0;
294 int fd = -1, m = 0; 293 int fd = -1, m = 0;
295 uintptr_t base = 0, useSharedSpacesAddr = 0; 294 uintptr_t base = 0, useSharedSpacesAddr = 0;
369 close(fd); 368 close(fd);
370 return false; 369 return false;
371 } 370 }
372 371
373 ph->core->classes_jsa_fd = fd; 372 ph->core->classes_jsa_fd = fd;
374 // add read-only maps from classes[_g].jsa to the list of maps 373 // add read-only maps from classes.jsa to the list of maps
375 for (m = 0; m < NUM_SHARED_MAPS; m++) { 374 for (m = 0; m < NUM_SHARED_MAPS; m++) {
376 if (header._space[m]._read_only) { 375 if (header._space[m]._read_only) {
377 base = (uintptr_t) header._space[m]._base; 376 base = (uintptr_t) header._space[m]._base;
378 // no need to worry about the fractional pages at-the-end. 377 // no need to worry about the fractional pages at-the-end.
379 // possible fractional pages are handled by core_read_data. 378 // possible fractional pages are handled by core_read_data.