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comparison src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp @ 14445:67fa91961822

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8029940: PPC64 (part 122): C2 compiler port Reviewed-by: kvn
author goetz
date Wed, 11 Dec 2013 00:06:11 +0100
parents ec28f9c041ff
children 327e7269f90d
comparison
equal deleted inserted replaced
14444:492e67693373 14445:67fa91961822
282 // A VM-related SIGILL may only occur if we are not in the zero page. 282 // A VM-related SIGILL may only occur if we are not in the zero page.
283 // On AIX, we get a SIGILL if we jump to 0x0 or to somewhere else 283 // On AIX, we get a SIGILL if we jump to 0x0 or to somewhere else
284 // in the zero page, because it is filled with 0x0. We ignore 284 // in the zero page, because it is filled with 0x0. We ignore
285 // explicit SIGILLs in the zero page. 285 // explicit SIGILLs in the zero page.
286 if (sig == SIGILL && (pc < (address) 0x200)) { 286 if (sig == SIGILL && (pc < (address) 0x200)) {
287 if (TraceTraps) 287 if (TraceTraps) {
288 tty->print_raw_cr("SIGILL happened inside zero page."); 288 tty->print_raw_cr("SIGILL happened inside zero page.");
289 }
289 goto report_and_die; 290 goto report_and_die;
290 } 291 }
291 292
292 // Handle signal from NativeJump::patch_verified_entry(). 293 // Handle signal from NativeJump::patch_verified_entry().
293 if (( TrapBasedNotEntrantChecks && sig == SIGTRAP && nativeInstruction_at(pc)->is_sigtrap_zombie_not_entrant()) || 294 if (( TrapBasedNotEntrantChecks && sig == SIGTRAP && nativeInstruction_at(pc)->is_sigtrap_zombie_not_entrant()) ||
294 (!TrapBasedNotEntrantChecks && sig == SIGILL && nativeInstruction_at(pc)->is_sigill_zombie_not_entrant())) { 295 (!TrapBasedNotEntrantChecks && sig == SIGILL && nativeInstruction_at(pc)->is_sigill_zombie_not_entrant())) {
295 if (TraceTraps) 296 if (TraceTraps) {
296 tty->print_cr("trap: zombie_not_entrant (%s)", (sig == SIGTRAP) ? "SIGTRAP" : "SIGILL"); 297 tty->print_cr("trap: zombie_not_entrant (%s)", (sig == SIGTRAP) ? "SIGTRAP" : "SIGILL");
298 }
297 stub = SharedRuntime::get_handle_wrong_method_stub(); 299 stub = SharedRuntime::get_handle_wrong_method_stub();
298 } 300 }
299 301
300 else if (sig == SIGSEGV && 302 else if (sig == SIGSEGV &&
301 // A linux-ppc64 kernel before 2.6.6 doesn't set si_addr on some segfaults 303 // A linux-ppc64 kernel before 2.6.6 doesn't set si_addr on some segfaults
302 // in 64bit mode (cf. http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6), 304 // in 64bit mode (cf. http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6),
303 // especially when we try to read from the safepoint polling page. So the check 305 // especially when we try to read from the safepoint polling page. So the check
304 // (address)info->si_addr == os::get_standard_polling_page() 306 // (address)info->si_addr == os::get_standard_polling_page()
305 // doesn't work for us. We use: 307 // doesn't work for us. We use:
306 ((NativeInstruction*)pc)->is_safepoint_poll()) { 308 ((NativeInstruction*)pc)->is_safepoint_poll()) {
307 if (TraceTraps) 309 if (TraceTraps) {
308 tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", pc); 310 tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", pc);
311 }
309 stub = SharedRuntime::get_poll_stub(pc); 312 stub = SharedRuntime::get_poll_stub(pc);
310 } 313 }
311 314
312 // SIGTRAP-based ic miss check in compiled code. 315 // SIGTRAP-based ic miss check in compiled code.
313 else if (sig == SIGTRAP && TrapBasedICMissChecks && 316 else if (sig == SIGTRAP && TrapBasedICMissChecks &&
314 nativeInstruction_at(pc)->is_sigtrap_ic_miss_check()) { 317 nativeInstruction_at(pc)->is_sigtrap_ic_miss_check()) {
315 if (TraceTraps) 318 if (TraceTraps) {
316 tty->print_cr("trap: ic_miss_check at " INTPTR_FORMAT " (SIGTRAP)", pc); 319 tty->print_cr("trap: ic_miss_check at " INTPTR_FORMAT " (SIGTRAP)", pc);
320 }
317 stub = SharedRuntime::get_ic_miss_stub(); 321 stub = SharedRuntime::get_ic_miss_stub();
318 } 322 }
319 323
320 // SIGTRAP-based implicit null check in compiled code. 324 // SIGTRAP-based implicit null check in compiled code.
321 else if (sig == SIGTRAP && TrapBasedNullChecks && 325 else if (sig == SIGTRAP && TrapBasedNullChecks &&
322 nativeInstruction_at(pc)->is_sigtrap_null_check()) { 326 nativeInstruction_at(pc)->is_sigtrap_null_check()) {
323 if (TraceTraps) 327 if (TraceTraps) {
324 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGTRAP)", pc); 328 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGTRAP)", pc);
329 }
325 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 330 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
326 } 331 }
327 332
328 // SIGSEGV-based implicit null check in compiled code. 333 // SIGSEGV-based implicit null check in compiled code.
329 else if (sig == SIGSEGV && ImplicitNullChecks && 334 else if (sig == SIGSEGV && ImplicitNullChecks &&
330 CodeCache::contains((void*) pc) && 335 CodeCache::contains((void*) pc) &&
331 !MacroAssembler::needs_explicit_null_check((intptr_t) info->si_addr)) { 336 !MacroAssembler::needs_explicit_null_check((intptr_t) info->si_addr)) {
332 if (TraceTraps) 337 if (TraceTraps) {
333 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGSEGV)", pc); 338 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGSEGV)", pc);
339 }
334 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 340 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
335 } 341 }
336 342
337 #ifdef COMPILER2 343 #ifdef COMPILER2
338 // SIGTRAP-based implicit range check in compiled code. 344 // SIGTRAP-based implicit range check in compiled code.
339 else if (sig == SIGTRAP && TrapBasedRangeChecks && 345 else if (sig == SIGTRAP && TrapBasedRangeChecks &&
340 nativeInstruction_at(pc)->is_sigtrap_range_check()) { 346 nativeInstruction_at(pc)->is_sigtrap_range_check()) {
341 if (TraceTraps) 347 if (TraceTraps) {
342 tty->print_cr("trap: range_check at " INTPTR_FORMAT " (SIGTRAP)", pc); 348 tty->print_cr("trap: range_check at " INTPTR_FORMAT " (SIGTRAP)", pc);
349 }
343 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 350 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
344 } 351 }
345 #endif 352 #endif
346 else if (sig == SIGBUS) { 353 else if (sig == SIGBUS) {
347 // BugId 4454115: A read from a MappedByteBuffer can fault here if the 354 // BugId 4454115: A read from a MappedByteBuffer can fault here if the