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comparison src/share/vm/runtime/thread.cpp @ 1320:3b3d12e645e7

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6929067: Stack guard pages should be removed when thread is detached Summary: Add code to unmap stack guard area when thread is detached. Reviewed-by: coleenp, kamg
author coleenp
date Fri, 12 Mar 2010 10:42:16 -0500
parents c8a467bf56ad
children b30a2cd5e3a2 c18cbe5936b8 b96a3e44582f
comparison
equal deleted inserted replaced
1292:12d91eb0f579 1320:3b3d12e645e7
2135 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); 2135 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size();
2136 2136
2137 int allocate = os::allocate_stack_guard_pages(); 2137 int allocate = os::allocate_stack_guard_pages();
2138 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); 2138 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len);
2139 2139
2140 if (allocate && !os::commit_memory((char *) low_addr, len)) { 2140 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) {
2141 warning("Attempt to allocate stack guard pages failed."); 2141 warning("Attempt to allocate stack guard pages failed.");
2142 return; 2142 return;
2143 } 2143 }
2144 2144
2145 if (os::guard_memory((char *) low_addr, len)) { 2145 if (os::guard_memory((char *) low_addr, len)) {
2156 if (_stack_guard_state == stack_guard_unused) return; 2156 if (_stack_guard_state == stack_guard_unused) return;
2157 address low_addr = stack_base() - stack_size(); 2157 address low_addr = stack_base() - stack_size();
2158 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); 2158 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size();
2159 2159
2160 if (os::allocate_stack_guard_pages()) { 2160 if (os::allocate_stack_guard_pages()) {
2161 if (os::uncommit_memory((char *) low_addr, len)) { 2161 if (os::remove_stack_guard_pages((char *) low_addr, len)) {
2162 _stack_guard_state = stack_guard_unused; 2162 _stack_guard_state = stack_guard_unused;
2163 } else { 2163 } else {
2164 warning("Attempt to deallocate stack guard pages failed."); 2164 warning("Attempt to deallocate stack guard pages failed.");
2165 } 2165 }
2166 } else { 2166 } else {