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comparison src/os_cpu/linux_x86/vm/os_linux_x86.cpp @ 477:24fda36852ce

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6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X. Reviewed-by: acorn, jcoomes
author coleenp
date Wed, 10 Dec 2008 15:14:29 -0800
parents d1605aabd0a1
children 0fbdb4381b99
comparison
equal deleted inserted replaced
473:3ad2b8576c4a 477:24fda36852ce
420 420
421 // In conservative mode, don't unguard unless the address is in the VM 421 // In conservative mode, don't unguard unless the address is in the VM
422 if (addr != last_addr && 422 if (addr != last_addr &&
423 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { 423 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
424 424
425 // Unguard and retry 425 // Set memory to RWX and retry
426 address page_start = 426 address page_start =
427 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); 427 (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
428 bool res = os::unguard_memory((char*) page_start, page_size); 428 bool res = os::protect_memory((char*) page_start, page_size,
429 os::MEM_PROT_RWX);
429 430
430 if (PrintMiscellaneous && Verbose) { 431 if (PrintMiscellaneous && Verbose) {
431 char buf[256]; 432 char buf[256];
432 jio_snprintf(buf, sizeof(buf), "Execution protection violation " 433 jio_snprintf(buf, sizeof(buf), "Execution protection violation "
433 "at " INTPTR_FORMAT 434 "at " INTPTR_FORMAT