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This commit is contained in:
Daniel D. Daugherty 2010-08-27 21:31:15 -07:00
commit d7850a0df7
2 changed files with 14 additions and 5 deletions
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17
hotspot/src/os/linux/vm/os_linux.cpp
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@ -2597,10 +2597,14 @@ get_stack_bounds(uintptr_t *bottom, uintptr_t *top)
// where we're going to put our guard pages, truncate the mapping at
// that point by munmap()ping it. This ensures that when we later
// munmap() the guard pages we don't leave a hole in the stack
// mapping.
// mapping. This only affects the main/initial thread, but guard
// against future OS changes
bool os::create_stack_guard_pages(char* addr, size_t size) {
uintptr_t stack_extent, stack_base;
if (get_stack_bounds(&stack_extent, &stack_base)) {
bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true);
if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) {
assert(os::Linux::is_initial_thread(),
"growable stack in non-initial thread");
if (stack_extent < (uintptr_t)addr)
::munmap((void*)stack_extent, (uintptr_t)addr - stack_extent);
}
@ -2609,10 +2613,15 @@ bool os::create_stack_guard_pages(char* addr, size_t size) {
}
// If this is a growable mapping, remove the guard pages entirely by
// munmap()ping them. If not, just call uncommit_memory().
// munmap()ping them. If not, just call uncommit_memory(). This only
// affects the main/initial thread, but guard against future OS changes
bool os::remove_stack_guard_pages(char* addr, size_t size) {
uintptr_t stack_extent, stack_base;
if (get_stack_bounds(&stack_extent, &stack_base)) {
bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true);
if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) {
assert(os::Linux::is_initial_thread(),
"growable stack in non-initial thread");
return ::munmap(addr, size) == 0;
}

2
hotspot/src/share/vm/oops/instanceKlass.cpp
View file

@ -382,7 +382,7 @@ void instanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) {
const char* desc = "Could not initialize class ";
const char* className = this_oop->external_name();
size_t msglen = strlen(desc) + strlen(className) + 1;
char* message = NEW_C_HEAP_ARRAY(char, msglen);
char* message = NEW_RESOURCE_ARRAY(char, msglen);
if (NULL == message) {
// Out of memory: can't create detailed error message
THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);