Mercurial > hg > graal-jvmci-8
annotate src/os_cpu/linux_sparc/vm/vm_version_linux_sparc.cpp @ 24113:8cf4cf3f9f2a
missing checks in HotSpotMemoryAccessProviderImpl can cause VM assertions to fail - part 3 (JDK-8177673)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Sat, 01 Apr 2017 00:28:33 +0200 |
| parents | 7985a33bac9c |
| children |
| rev | line source |
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| 133 | 1 /* |
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2 * Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved. |
| 133 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 133 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "runtime/os.hpp" | |
| 27 #include "vm_version_sparc.hpp" | |
| 133 | 28 |
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29 static bool cpuinfo_field_contains(const char* field, const char* value) { |
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30 char line[1024]; |
| 133 | 31 bool rv = false; |
| 32 | |
| 33 FILE* fp = fopen("/proc/cpuinfo", "r"); | |
| 34 if (fp == NULL) { | |
| 35 return rv; | |
| 36 } | |
| 37 | |
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38 while (fgets(line, sizeof(line), fp) != NULL) { |
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39 assert(strlen(line) < sizeof(line) - 1, "buffer line[1024] is too small."); |
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40 if (strncmp(line, field, strlen(field)) == 0) { |
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41 if (strstr(line, value) != NULL) { |
| 133 | 42 rv = true; |
| 43 } | |
| 44 break; | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 fclose(fp); | |
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49 return rv; |
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50 } |
| 133 | 51 |
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52 static bool detect_niagara() { |
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53 return cpuinfo_field_contains("cpu", "Niagara"); |
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54 } |
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55 |
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56 static bool detect_M_family() { |
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57 return cpuinfo_field_contains("cpu", "SPARC-M"); |
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58 } |
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59 |
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60 static bool detect_blkinit() { |
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61 return cpuinfo_field_contains("cpucaps", "blkinit"); |
| 133 | 62 } |
| 63 | |
| 64 int VM_Version::platform_features(int features) { | |
| 65 // Default to generic v9 | |
| 66 features = generic_v9_m; | |
| 67 | |
| 68 if (detect_niagara()) { | |
| 69 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");) | |
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70 features = niagara1_m | T_family_m; |
| 133 | 71 } |
| 72 | |
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73 if (detect_M_family()) { |
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74 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on M family");) |
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75 features = sun4v_m | generic_v9_m | M_family_m | T_family_m; |
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76 } |
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77 |
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78 if (detect_blkinit()) { |
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79 features |= blk_init_instructions_m; |
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80 } |
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81 |
| 133 | 82 return features; |
| 83 } |