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comparison src/os/bsd/vm/os_bsd.cpp @ 10398:2cb5d5f6d5e5

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8015252: Enable HotSpot build with Clang Reviewed-by: twisti, dholmes, kvn
author simonis
date Tue, 04 Jun 2013 22:16:15 -0700
parents 9ce110b1d14a
children ef1818846c22
comparison
equal deleted inserted replaced
10397:075ea888b039 10398:2cb5d5f6d5e5
624 624
625 625
626 ////////////////////////////////////////////////////////////////////////////// 626 //////////////////////////////////////////////////////////////////////////////
627 // create new thread 627 // create new thread
628 628
629 static address highest_vm_reserved_address();
630
631 // check if it's safe to start a new thread 629 // check if it's safe to start a new thread
632 static bool _thread_safety_check(Thread* thread) { 630 static bool _thread_safety_check(Thread* thread) {
633 return true; 631 return true;
634 } 632 }
635 633
2110 2108
2111 bool os::pd_release_memory(char* addr, size_t size) { 2109 bool os::pd_release_memory(char* addr, size_t size) {
2112 return anon_munmap(addr, size); 2110 return anon_munmap(addr, size);
2113 } 2111 }
2114 2112
2115 static address highest_vm_reserved_address() {
2116 return _highest_vm_reserved_address;
2117 }
2118
2119 static bool bsd_mprotect(char* addr, size_t size, int prot) { 2113 static bool bsd_mprotect(char* addr, size_t size, int prot) {
2120 // Bsd wants the mprotect address argument to be page aligned. 2114 // Bsd wants the mprotect address argument to be page aligned.
2121 char* bottom = (char*)align_size_down((intptr_t)addr, os::Bsd::page_size()); 2115 char* bottom = (char*)align_size_down((intptr_t)addr, os::Bsd::page_size());
2122 2116
2123 // According to SUSv3, mprotect() should only be used with mappings 2117 // According to SUSv3, mprotect() should only be used with mappings
2155 return bsd_mprotect(addr, size, PROT_READ|PROT_WRITE); 2149 return bsd_mprotect(addr, size, PROT_READ|PROT_WRITE);
2156 } 2150 }
2157 2151
2158 bool os::Bsd::hugetlbfs_sanity_check(bool warn, size_t page_size) { 2152 bool os::Bsd::hugetlbfs_sanity_check(bool warn, size_t page_size) {
2159 return false; 2153 return false;
2160 }
2161
2162 /*
2163 * Set the coredump_filter bits to include largepages in core dump (bit 6)
2164 *
2165 * From the coredump_filter documentation:
2166 *
2167 * - (bit 0) anonymous private memory
2168 * - (bit 1) anonymous shared memory
2169 * - (bit 2) file-backed private memory
2170 * - (bit 3) file-backed shared memory
2171 * - (bit 4) ELF header pages in file-backed private memory areas (it is
2172 * effective only if the bit 2 is cleared)
2173 * - (bit 5) hugetlb private memory
2174 * - (bit 6) hugetlb shared memory
2175 */
2176 static void set_coredump_filter(void) {
2177 FILE *f;
2178 long cdm;
2179
2180 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) {
2181 return;
2182 }
2183
2184 if (fscanf(f, "%lx", &cdm) != 1) {
2185 fclose(f);
2186 return;
2187 }
2188
2189 rewind(f);
2190
2191 if ((cdm & LARGEPAGES_BIT) == 0) {
2192 cdm |= LARGEPAGES_BIT;
2193 fprintf(f, "%#lx", cdm);
2194 }
2195
2196 fclose(f);
2197 } 2154 }
2198 2155
2199 // Large page support 2156 // Large page support
2200 2157
2201 static size_t _large_page_size = 0; 2158 static size_t _large_page_size = 0;