Mercurial > hg > graal-jvmci-8
annotate src/os/posix/vm/os_posix.cpp @ 14411:bdd155477289
8023033: PPC64 (part 13): basic changes for AIX
Summary: Added AIX includes alpha-sorted before BSD. Fix compilation issues with xlC in shared code. Basic shared platform dependend adaption (vm_version etc.).
Reviewed-by: kvn, dholmes, stefank
author | goetz |
---|---|
date | Thu, 22 Aug 2013 09:39:54 -0700 |
parents | f42f2e2a1518 |
children | e2722a66aba7 |
rev | line source |
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2204 | 1 /* |
14410 | 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
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 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
2204 | 24 |
14410 | 25 #include "utilities/globalDefinitions.hpp" |
2204 | 26 #include "prims/jvm.h" |
6197 | 27 #include "runtime/frame.inline.hpp" |
2204 | 28 #include "runtime/os.hpp" |
29 #include "utilities/vmError.hpp" | |
30 | |
14410 | 31 #include <signal.h> |
2204 | 32 #include <unistd.h> |
33 #include <sys/resource.h> | |
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34 #include <sys/utsname.h> |
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35 |
14410 | 36 // Todo: provide a os::get_max_process_id() or similar. Number of processes |
37 // may have been configured, can be read more accurately from proc fs etc. | |
38 #ifndef MAX_PID | |
39 #define MAX_PID INT_MAX | |
40 #endif | |
41 #define IS_VALID_PID(p) (p > 0 && p < MAX_PID) | |
2204 | 42 |
43 // Check core dump limit and report possible place where core can be found | |
44 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { | |
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45 int n; |
2204 | 46 struct rlimit rlim; |
47 bool success; | |
48 | |
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49 n = get_core_path(buffer, bufferSize); |
2204 | 50 |
51 if (getrlimit(RLIMIT_CORE, &rlim) != 0) { | |
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52 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id()); |
2204 | 53 success = true; |
54 } else { | |
55 switch(rlim.rlim_cur) { | |
56 case RLIM_INFINITY: | |
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57 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id()); |
2204 | 58 success = true; |
59 break; | |
60 case 0: | |
61 jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again"); | |
62 success = false; | |
63 break; | |
64 default: | |
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65 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", current_process_id(), (unsigned long)(rlim.rlim_cur >> 10)); |
2204 | 66 success = true; |
67 break; | |
68 } | |
69 } | |
70 VMError::report_coredump_status(buffer, success); | |
71 } | |
72 | |
6197 | 73 address os::get_caller_pc(int n) { |
74 #ifdef _NMT_NOINLINE_ | |
75 n ++; | |
76 #endif | |
77 frame fr = os::current_frame(); | |
78 while (n > 0 && fr.pc() && | |
79 !os::is_first_C_frame(&fr) && fr.sender_pc()) { | |
80 fr = os::get_sender_for_C_frame(&fr); | |
81 n --; | |
82 } | |
83 if (n == 0) { | |
84 return fr.pc(); | |
85 } else { | |
86 return NULL; | |
87 } | |
88 } | |
89 | |
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90 int os::get_last_error() { |
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91 return errno; |
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92 } |
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93 |
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94 bool os::is_debugger_attached() { |
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95 // not implemented |
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96 return false; |
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97 } |
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98 |
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99 void os::wait_for_keypress_at_exit(void) { |
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100 // don't do anything on posix platforms |
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101 return; |
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102 } |
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103 |
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104 // Multiple threads can race in this code, and can remap over each other with MAP_FIXED, |
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105 // so on posix, unmap the section at the start and at the end of the chunk that we mapped |
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106 // rather than unmapping and remapping the whole chunk to get requested alignment. |
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107 char* os::reserve_memory_aligned(size_t size, size_t alignment) { |
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108 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0, |
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109 "Alignment must be a multiple of allocation granularity (page size)"); |
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110 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned"); |
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111 |
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112 size_t extra_size = size + alignment; |
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113 assert(extra_size >= size, "overflow, size is too large to allow alignment"); |
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114 |
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115 char* extra_base = os::reserve_memory(extra_size, NULL, alignment); |
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116 |
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117 if (extra_base == NULL) { |
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118 return NULL; |
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119 } |
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120 |
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121 // Do manual alignment |
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122 char* aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment); |
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123 |
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124 // [ | | ] |
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125 // ^ extra_base |
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126 // ^ extra_base + begin_offset == aligned_base |
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127 // extra_base + begin_offset + size ^ |
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128 // extra_base + extra_size ^ |
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129 // |<>| == begin_offset |
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130 // end_offset == |<>| |
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131 size_t begin_offset = aligned_base - extra_base; |
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132 size_t end_offset = (extra_base + extra_size) - (aligned_base + size); |
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133 |
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134 if (begin_offset > 0) { |
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135 os::release_memory(extra_base, begin_offset); |
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136 } |
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137 |
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138 if (end_offset > 0) { |
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139 os::release_memory(extra_base + begin_offset + size, end_offset); |
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140 } |
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141 |
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142 return aligned_base; |
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143 } |
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144 |
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145 void os::Posix::print_load_average(outputStream* st) { |
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146 st->print("load average:"); |
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147 double loadavg[3]; |
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148 os::loadavg(loadavg, 3); |
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149 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); |
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150 st->cr(); |
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151 } |
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152 |
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153 void os::Posix::print_rlimit_info(outputStream* st) { |
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154 st->print("rlimit:"); |
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155 struct rlimit rlim; |
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156 |
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157 st->print(" STACK "); |
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158 getrlimit(RLIMIT_STACK, &rlim); |
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159 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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160 else st->print("%uk", rlim.rlim_cur >> 10); |
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161 |
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162 st->print(", CORE "); |
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163 getrlimit(RLIMIT_CORE, &rlim); |
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164 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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165 else st->print("%uk", rlim.rlim_cur >> 10); |
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166 |
14410 | 167 // Isn't there on solaris |
14411 | 168 #if! defined(TARGET_OS_FAMILY_solaris) && !defined(TARGET_OS_FAMILY_aix) |
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169 st->print(", NPROC "); |
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170 getrlimit(RLIMIT_NPROC, &rlim); |
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171 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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172 else st->print("%d", rlim.rlim_cur); |
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173 #endif |
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174 |
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175 st->print(", NOFILE "); |
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176 getrlimit(RLIMIT_NOFILE, &rlim); |
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177 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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178 else st->print("%d", rlim.rlim_cur); |
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179 |
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180 st->print(", AS "); |
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181 getrlimit(RLIMIT_AS, &rlim); |
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182 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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183 else st->print("%uk", rlim.rlim_cur >> 10); |
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184 st->cr(); |
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185 } |
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186 |
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187 void os::Posix::print_uname_info(outputStream* st) { |
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188 // kernel |
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189 st->print("uname:"); |
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190 struct utsname name; |
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191 uname(&name); |
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192 st->print(name.sysname); st->print(" "); |
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193 st->print(name.release); st->print(" "); |
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194 st->print(name.version); st->print(" "); |
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195 st->print(name.machine); |
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196 st->cr(); |
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197 } |
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198 |
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199 bool os::has_allocatable_memory_limit(julong* limit) { |
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200 struct rlimit rlim; |
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201 int getrlimit_res = getrlimit(RLIMIT_AS, &rlim); |
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202 // if there was an error when calling getrlimit, assume that there is no limitation |
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203 // on virtual memory. |
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204 bool result; |
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205 if ((getrlimit_res != 0) || (rlim.rlim_cur == RLIM_INFINITY)) { |
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206 result = false; |
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207 } else { |
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208 *limit = (julong)rlim.rlim_cur; |
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209 result = true; |
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210 } |
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211 #ifdef _LP64 |
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212 return result; |
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213 #else |
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214 // arbitrary virtual space limit for 32 bit Unices found by testing. If |
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215 // getrlimit above returned a limit, bound it with this limit. Otherwise |
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216 // directly use it. |
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217 const julong max_virtual_limit = (julong)3800*M; |
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218 if (result) { |
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219 *limit = MIN2(*limit, max_virtual_limit); |
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220 } else { |
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221 *limit = max_virtual_limit; |
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222 } |
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223 |
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224 // bound by actually allocatable memory. The algorithm uses two bounds, an |
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225 // upper and a lower limit. The upper limit is the current highest amount of |
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226 // memory that could not be allocated, the lower limit is the current highest |
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227 // amount of memory that could be allocated. |
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228 // The algorithm iteratively refines the result by halving the difference |
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229 // between these limits, updating either the upper limit (if that value could |
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230 // not be allocated) or the lower limit (if the that value could be allocated) |
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231 // until the difference between these limits is "small". |
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232 |
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233 // the minimum amount of memory we care about allocating. |
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234 const julong min_allocation_size = M; |
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235 |
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236 julong upper_limit = *limit; |
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237 |
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238 // first check a few trivial cases |
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239 if (is_allocatable(upper_limit) || (upper_limit <= min_allocation_size)) { |
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240 *limit = upper_limit; |
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241 } else if (!is_allocatable(min_allocation_size)) { |
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242 // we found that not even min_allocation_size is allocatable. Return it |
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243 // anyway. There is no point to search for a better value any more. |
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244 *limit = min_allocation_size; |
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245 } else { |
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246 // perform the binary search. |
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247 julong lower_limit = min_allocation_size; |
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248 while ((upper_limit - lower_limit) > min_allocation_size) { |
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249 julong temp_limit = ((upper_limit - lower_limit) / 2) + lower_limit; |
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250 temp_limit = align_size_down_(temp_limit, min_allocation_size); |
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251 if (is_allocatable(temp_limit)) { |
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252 lower_limit = temp_limit; |
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253 } else { |
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254 upper_limit = temp_limit; |
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255 } |
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256 } |
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257 *limit = lower_limit; |
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258 } |
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259 return true; |
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260 #endif |
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261 } |
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262 |
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263 const char* os::get_current_directory(char *buf, size_t buflen) { |
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264 return getcwd(buf, buflen); |
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265 } |
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266 |
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267 FILE* os::open(int fd, const char* mode) { |
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268 return ::fdopen(fd, mode); |
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269 } |
11151 | 270 |
14410 | 271 |
272 // Returned string is a constant. For unknown signals "UNKNOWN" is returned. | |
273 const char* os::Posix::get_signal_name(int sig, char* out, size_t outlen) { | |
274 | |
275 static const struct { | |
276 int sig; const char* name; | |
277 } | |
278 info[] = | |
279 { | |
280 { SIGABRT, "SIGABRT" }, | |
281 #ifdef SIGAIO | |
282 { SIGAIO, "SIGAIO" }, | |
283 #endif | |
284 { SIGALRM, "SIGALRM" }, | |
285 #ifdef SIGALRM1 | |
286 { SIGALRM1, "SIGALRM1" }, | |
287 #endif | |
288 { SIGBUS, "SIGBUS" }, | |
289 #ifdef SIGCANCEL | |
290 { SIGCANCEL, "SIGCANCEL" }, | |
291 #endif | |
292 { SIGCHLD, "SIGCHLD" }, | |
293 #ifdef SIGCLD | |
294 { SIGCLD, "SIGCLD" }, | |
295 #endif | |
296 { SIGCONT, "SIGCONT" }, | |
297 #ifdef SIGCPUFAIL | |
298 { SIGCPUFAIL, "SIGCPUFAIL" }, | |
299 #endif | |
300 #ifdef SIGDANGER | |
301 { SIGDANGER, "SIGDANGER" }, | |
302 #endif | |
303 #ifdef SIGDIL | |
304 { SIGDIL, "SIGDIL" }, | |
305 #endif | |
306 #ifdef SIGEMT | |
307 { SIGEMT, "SIGEMT" }, | |
308 #endif | |
309 { SIGFPE, "SIGFPE" }, | |
310 #ifdef SIGFREEZE | |
311 { SIGFREEZE, "SIGFREEZE" }, | |
312 #endif | |
313 #ifdef SIGGFAULT | |
314 { SIGGFAULT, "SIGGFAULT" }, | |
315 #endif | |
316 #ifdef SIGGRANT | |
317 { SIGGRANT, "SIGGRANT" }, | |
318 #endif | |
319 { SIGHUP, "SIGHUP" }, | |
320 { SIGILL, "SIGILL" }, | |
321 { SIGINT, "SIGINT" }, | |
322 #ifdef SIGIO | |
323 { SIGIO, "SIGIO" }, | |
324 #endif | |
325 #ifdef SIGIOINT | |
326 { SIGIOINT, "SIGIOINT" }, | |
327 #endif | |
328 #ifdef SIGIOT | |
329 // SIGIOT is there for BSD compatibility, but on most Unices just a | |
330 // synonym for SIGABRT. The result should be "SIGABRT", not | |
331 // "SIGIOT". | |
332 #if (SIGIOT != SIGABRT ) | |
333 { SIGIOT, "SIGIOT" }, | |
334 #endif | |
335 #endif | |
336 #ifdef SIGKAP | |
337 { SIGKAP, "SIGKAP" }, | |
338 #endif | |
339 { SIGKILL, "SIGKILL" }, | |
340 #ifdef SIGLOST | |
341 { SIGLOST, "SIGLOST" }, | |
342 #endif | |
343 #ifdef SIGLWP | |
344 { SIGLWP, "SIGLWP" }, | |
345 #endif | |
346 #ifdef SIGLWPTIMER | |
347 { SIGLWPTIMER, "SIGLWPTIMER" }, | |
348 #endif | |
349 #ifdef SIGMIGRATE | |
350 { SIGMIGRATE, "SIGMIGRATE" }, | |
351 #endif | |
352 #ifdef SIGMSG | |
353 { SIGMSG, "SIGMSG" }, | |
354 #endif | |
355 { SIGPIPE, "SIGPIPE" }, | |
356 #ifdef SIGPOLL | |
357 { SIGPOLL, "SIGPOLL" }, | |
358 #endif | |
359 #ifdef SIGPRE | |
360 { SIGPRE, "SIGPRE" }, | |
361 #endif | |
362 { SIGPROF, "SIGPROF" }, | |
363 #ifdef SIGPTY | |
364 { SIGPTY, "SIGPTY" }, | |
365 #endif | |
366 #ifdef SIGPWR | |
367 { SIGPWR, "SIGPWR" }, | |
368 #endif | |
369 { SIGQUIT, "SIGQUIT" }, | |
370 #ifdef SIGRECONFIG | |
371 { SIGRECONFIG, "SIGRECONFIG" }, | |
372 #endif | |
373 #ifdef SIGRECOVERY | |
374 { SIGRECOVERY, "SIGRECOVERY" }, | |
375 #endif | |
376 #ifdef SIGRESERVE | |
377 { SIGRESERVE, "SIGRESERVE" }, | |
378 #endif | |
379 #ifdef SIGRETRACT | |
380 { SIGRETRACT, "SIGRETRACT" }, | |
381 #endif | |
382 #ifdef SIGSAK | |
383 { SIGSAK, "SIGSAK" }, | |
384 #endif | |
385 { SIGSEGV, "SIGSEGV" }, | |
386 #ifdef SIGSOUND | |
387 { SIGSOUND, "SIGSOUND" }, | |
388 #endif | |
389 { SIGSTOP, "SIGSTOP" }, | |
390 { SIGSYS, "SIGSYS" }, | |
391 #ifdef SIGSYSERROR | |
392 { SIGSYSERROR, "SIGSYSERROR" }, | |
393 #endif | |
394 #ifdef SIGTALRM | |
395 { SIGTALRM, "SIGTALRM" }, | |
396 #endif | |
397 { SIGTERM, "SIGTERM" }, | |
398 #ifdef SIGTHAW | |
399 { SIGTHAW, "SIGTHAW" }, | |
400 #endif | |
401 { SIGTRAP, "SIGTRAP" }, | |
402 #ifdef SIGTSTP | |
403 { SIGTSTP, "SIGTSTP" }, | |
404 #endif | |
405 { SIGTTIN, "SIGTTIN" }, | |
406 { SIGTTOU, "SIGTTOU" }, | |
407 #ifdef SIGURG | |
408 { SIGURG, "SIGURG" }, | |
409 #endif | |
410 { SIGUSR1, "SIGUSR1" }, | |
411 { SIGUSR2, "SIGUSR2" }, | |
412 #ifdef SIGVIRT | |
413 { SIGVIRT, "SIGVIRT" }, | |
414 #endif | |
415 { SIGVTALRM, "SIGVTALRM" }, | |
416 #ifdef SIGWAITING | |
417 { SIGWAITING, "SIGWAITING" }, | |
418 #endif | |
419 #ifdef SIGWINCH | |
420 { SIGWINCH, "SIGWINCH" }, | |
421 #endif | |
422 #ifdef SIGWINDOW | |
423 { SIGWINDOW, "SIGWINDOW" }, | |
424 #endif | |
425 { SIGXCPU, "SIGXCPU" }, | |
426 { SIGXFSZ, "SIGXFSZ" }, | |
427 #ifdef SIGXRES | |
428 { SIGXRES, "SIGXRES" }, | |
429 #endif | |
430 { -1, NULL } | |
431 }; | |
432 | |
433 const char* ret = NULL; | |
434 | |
435 #ifdef SIGRTMIN | |
436 if (sig >= SIGRTMIN && sig <= SIGRTMAX) { | |
437 if (sig == SIGRTMIN) { | |
438 ret = "SIGRTMIN"; | |
439 } else if (sig == SIGRTMAX) { | |
440 ret = "SIGRTMAX"; | |
441 } else { | |
442 jio_snprintf(out, outlen, "SIGRTMIN+%d", sig - SIGRTMIN); | |
443 return out; | |
444 } | |
445 } | |
446 #endif | |
447 | |
448 if (sig > 0) { | |
449 for (int idx = 0; info[idx].sig != -1; idx ++) { | |
450 if (info[idx].sig == sig) { | |
451 ret = info[idx].name; | |
452 break; | |
453 } | |
454 } | |
455 } | |
456 | |
457 if (!ret) { | |
458 if (!is_valid_signal(sig)) { | |
459 ret = "INVALID"; | |
460 } else { | |
461 ret = "UNKNOWN"; | |
462 } | |
463 } | |
464 | |
465 jio_snprintf(out, outlen, ret); | |
466 return out; | |
467 } | |
468 | |
469 // Returns true if signal number is valid. | |
470 bool os::Posix::is_valid_signal(int sig) { | |
471 // MacOS not really POSIX compliant: sigaddset does not return | |
472 // an error for invalid signal numbers. However, MacOS does not | |
473 // support real time signals and simply seems to have just 33 | |
474 // signals with no holes in the signal range. | |
475 #ifdef __APPLE__ | |
476 return sig >= 1 && sig < NSIG; | |
477 #else | |
478 // Use sigaddset to check for signal validity. | |
479 sigset_t set; | |
480 if (sigaddset(&set, sig) == -1 && errno == EINVAL) { | |
481 return false; | |
482 } | |
483 return true; | |
484 #endif | |
485 } | |
486 | |
487 #define NUM_IMPORTANT_SIGS 32 | |
488 // Returns one-line short description of a signal set in a user provided buffer. | |
489 const char* os::Posix::describe_signal_set_short(const sigset_t* set, char* buffer, size_t buf_size) { | |
14411 | 490 assert(buf_size == (NUM_IMPORTANT_SIGS + 1), "wrong buffer size"); |
14410 | 491 // Note: for shortness, just print out the first 32. That should |
492 // cover most of the useful ones, apart from realtime signals. | |
493 for (int sig = 1; sig <= NUM_IMPORTANT_SIGS; sig++) { | |
494 const int rc = sigismember(set, sig); | |
495 if (rc == -1 && errno == EINVAL) { | |
496 buffer[sig-1] = '?'; | |
497 } else { | |
498 buffer[sig-1] = rc == 0 ? '0' : '1'; | |
499 } | |
500 } | |
501 buffer[NUM_IMPORTANT_SIGS] = 0; | |
502 return buffer; | |
503 } | |
504 | |
505 // Prints one-line description of a signal set. | |
506 void os::Posix::print_signal_set_short(outputStream* st, const sigset_t* set) { | |
507 char buf[NUM_IMPORTANT_SIGS + 1]; | |
508 os::Posix::describe_signal_set_short(set, buf, sizeof(buf)); | |
509 st->print(buf); | |
510 } | |
511 | |
512 // Writes one-line description of a combination of sigaction.sa_flags into a user | |
513 // provided buffer. Returns that buffer. | |
514 const char* os::Posix::describe_sa_flags(int flags, char* buffer, size_t size) { | |
515 char* p = buffer; | |
516 size_t remaining = size; | |
517 bool first = true; | |
518 int idx = 0; | |
519 | |
520 assert(buffer, "invalid argument"); | |
521 | |
522 if (size == 0) { | |
523 return buffer; | |
524 } | |
525 | |
526 strncpy(buffer, "none", size); | |
527 | |
528 const struct { | |
529 int i; | |
530 const char* s; | |
531 } flaginfo [] = { | |
532 { SA_NOCLDSTOP, "SA_NOCLDSTOP" }, | |
533 { SA_ONSTACK, "SA_ONSTACK" }, | |
534 { SA_RESETHAND, "SA_RESETHAND" }, | |
535 { SA_RESTART, "SA_RESTART" }, | |
536 { SA_SIGINFO, "SA_SIGINFO" }, | |
537 { SA_NOCLDWAIT, "SA_NOCLDWAIT" }, | |
538 { SA_NODEFER, "SA_NODEFER" }, | |
539 #ifdef AIX | |
540 { SA_ONSTACK, "SA_ONSTACK" }, | |
541 { SA_OLDSTYLE, "SA_OLDSTYLE" }, | |
542 #endif | |
543 { 0, NULL } | |
544 }; | |
545 | |
546 for (idx = 0; flaginfo[idx].s && remaining > 1; idx++) { | |
547 if (flags & flaginfo[idx].i) { | |
548 if (first) { | |
549 jio_snprintf(p, remaining, "%s", flaginfo[idx].s); | |
550 first = false; | |
551 } else { | |
552 jio_snprintf(p, remaining, "|%s", flaginfo[idx].s); | |
553 } | |
554 const size_t len = strlen(p); | |
555 p += len; | |
556 remaining -= len; | |
557 } | |
558 } | |
559 | |
560 buffer[size - 1] = '\0'; | |
561 | |
562 return buffer; | |
563 } | |
564 | |
565 // Prints one-line description of a combination of sigaction.sa_flags. | |
566 void os::Posix::print_sa_flags(outputStream* st, int flags) { | |
567 char buffer[0x100]; | |
568 os::Posix::describe_sa_flags(flags, buffer, sizeof(buffer)); | |
569 st->print(buffer); | |
570 } | |
571 | |
572 // Helper function for os::Posix::print_siginfo_...(): | |
573 // return a textual description for signal code. | |
574 struct enum_sigcode_desc_t { | |
575 const char* s_name; | |
576 const char* s_desc; | |
577 }; | |
578 | |
579 static bool get_signal_code_description(const siginfo_t* si, enum_sigcode_desc_t* out) { | |
580 | |
581 const struct { | |
582 int sig; int code; const char* s_code; const char* s_desc; | |
583 } t1 [] = { | |
584 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode." }, | |
585 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand." }, | |
586 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode." }, | |
587 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap." }, | |
588 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode." }, | |
589 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register." }, | |
590 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error." }, | |
591 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error." }, | |
592 #if defined(IA64) && defined(LINUX) | |
593 { SIGILL, ILL_BADIADDR, "ILL_BADIADDR", "Unimplemented instruction address" }, | |
594 { SIGILL, ILL_BREAK, "ILL_BREAK", "Application Break instruction" }, | |
595 #endif | |
596 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero." }, | |
597 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow." }, | |
598 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating-point divide by zero." }, | |
599 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating-point overflow." }, | |
600 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating-point underflow." }, | |
601 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating-point inexact result." }, | |
602 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating-point operation." }, | |
603 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range." }, | |
604 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object." }, | |
605 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for mapped object." }, | |
606 #ifdef AIX | |
607 // no explanation found what keyerr would be | |
608 { SIGSEGV, SEGV_KEYERR, "SEGV_KEYERR", "key error" }, | |
609 #endif | |
610 #if defined(IA64) && !defined(AIX) | |
611 { SIGSEGV, SEGV_PSTKOVF, "SEGV_PSTKOVF", "Paragraph stack overflow" }, | |
612 #endif | |
613 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment." }, | |
614 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Nonexistent physical address." }, | |
615 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object-specific hardware error." }, | |
616 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint." }, | |
617 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap." }, | |
618 { SIGCHLD, CLD_EXITED, "CLD_EXITED", "Child has exited." }, | |
619 { SIGCHLD, CLD_KILLED, "CLD_KILLED", "Child has terminated abnormally and did not create a core file." }, | |
620 { SIGCHLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally and created a core file." }, | |
621 { SIGCHLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped." }, | |
622 { SIGCHLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped." }, | |
623 { SIGCHLD, CLD_CONTINUED,"CLD_CONTINUED","Stopped child has continued." }, | |
624 #ifdef SIGPOLL | |
625 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available." }, | |
626 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available." }, | |
627 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error." }, | |
628 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available." }, | |
629 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected. [Option End]" }, | |
630 #endif | |
631 { -1, -1, NULL, NULL } | |
632 }; | |
633 | |
634 // Codes valid in any signal context. | |
635 const struct { | |
636 int code; const char* s_code; const char* s_desc; | |
637 } t2 [] = { | |
638 { SI_USER, "SI_USER", "Signal sent by kill()." }, | |
639 { SI_QUEUE, "SI_QUEUE", "Signal sent by the sigqueue()." }, | |
640 { SI_TIMER, "SI_TIMER", "Signal generated by expiration of a timer set by timer_settime()." }, | |
641 { SI_ASYNCIO, "SI_ASYNCIO", "Signal generated by completion of an asynchronous I/O request." }, | |
642 { SI_MESGQ, "SI_MESGQ", "Signal generated by arrival of a message on an empty message queue." }, | |
643 // Linux specific | |
644 #ifdef SI_TKILL | |
645 { SI_TKILL, "SI_TKILL", "Signal sent by tkill (pthread_kill)" }, | |
646 #endif | |
647 #ifdef SI_DETHREAD | |
648 { SI_DETHREAD, "SI_DETHREAD", "Signal sent by execve() killing subsidiary threads" }, | |
649 #endif | |
650 #ifdef SI_KERNEL | |
651 { SI_KERNEL, "SI_KERNEL", "Signal sent by kernel." }, | |
652 #endif | |
653 #ifdef SI_SIGIO | |
654 { SI_SIGIO, "SI_SIGIO", "Signal sent by queued SIGIO" }, | |
655 #endif | |
656 | |
657 #ifdef AIX | |
658 { SI_UNDEFINED, "SI_UNDEFINED","siginfo contains partial information" }, | |
659 { SI_EMPTY, "SI_EMPTY", "siginfo contains no useful information" }, | |
660 #endif | |
661 | |
662 #ifdef __sun | |
663 { SI_NOINFO, "SI_NOINFO", "No signal information" }, | |
664 { SI_RCTL, "SI_RCTL", "kernel generated signal via rctl action" }, | |
665 { SI_LWP, "SI_LWP", "Signal sent via lwp_kill" }, | |
666 #endif | |
667 | |
668 { -1, NULL, NULL } | |
669 }; | |
670 | |
671 const char* s_code = NULL; | |
672 const char* s_desc = NULL; | |
673 | |
674 for (int i = 0; t1[i].sig != -1; i ++) { | |
675 if (t1[i].sig == si->si_signo && t1[i].code == si->si_code) { | |
676 s_code = t1[i].s_code; | |
677 s_desc = t1[i].s_desc; | |
678 break; | |
679 } | |
680 } | |
681 | |
682 if (s_code == NULL) { | |
683 for (int i = 0; t2[i].s_code != NULL; i ++) { | |
684 if (t2[i].code == si->si_code) { | |
685 s_code = t2[i].s_code; | |
686 s_desc = t2[i].s_desc; | |
687 } | |
688 } | |
689 } | |
690 | |
691 if (s_code == NULL) { | |
692 out->s_name = "unknown"; | |
693 out->s_desc = "unknown"; | |
694 return false; | |
695 } | |
696 | |
697 out->s_name = s_code; | |
698 out->s_desc = s_desc; | |
699 | |
700 return true; | |
701 } | |
702 | |
703 // A POSIX conform, platform-independend siginfo print routine. | |
704 // Short print out on one line. | |
705 void os::Posix::print_siginfo_brief(outputStream* os, const siginfo_t* si) { | |
706 char buf[20]; | |
707 os->print("siginfo: "); | |
708 | |
709 if (!si) { | |
710 os->print("<null>"); | |
711 return; | |
712 } | |
713 | |
714 // See print_siginfo_full() for details. | |
715 const int sig = si->si_signo; | |
716 | |
717 os->print("si_signo: %d (%s)", sig, os::Posix::get_signal_name(sig, buf, sizeof(buf))); | |
718 | |
719 enum_sigcode_desc_t ed; | |
720 if (get_signal_code_description(si, &ed)) { | |
721 os->print(", si_code: %d (%s)", si->si_code, ed.s_name); | |
722 } else { | |
723 os->print(", si_code: %d (unknown)", si->si_code); | |
724 } | |
725 | |
726 if (si->si_errno) { | |
727 os->print(", si_errno: %d", si->si_errno); | |
728 } | |
729 | |
730 const int me = (int) ::getpid(); | |
731 const int pid = (int) si->si_pid; | |
732 | |
733 if (si->si_code == SI_USER || si->si_code == SI_QUEUE) { | |
734 if (IS_VALID_PID(pid) && pid != me) { | |
735 os->print(", sent from pid: %d (uid: %d)", pid, (int) si->si_uid); | |
736 } | |
737 } else if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || | |
738 sig == SIGTRAP || sig == SIGFPE) { | |
739 os->print(", si_addr: " PTR_FORMAT, si->si_addr); | |
740 #ifdef SIGPOLL | |
741 } else if (sig == SIGPOLL) { | |
742 os->print(", si_band: " PTR64_FORMAT, (uint64_t)si->si_band); | |
743 #endif | |
744 } else if (sig == SIGCHLD) { | |
745 os->print_cr(", si_pid: %d, si_uid: %d, si_status: %d", (int) si->si_pid, si->si_uid, si->si_status); | |
746 } | |
747 } | |
748 | |
11151 | 749 os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() { |
750 assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread"); | |
751 } | |
752 | |
753 /* | |
754 * See the caveats for this class in os_posix.hpp | |
755 * Protects the callback call so that SIGSEGV / SIGBUS jumps back into this | |
756 * method and returns false. If none of the signals are raised, returns true. | |
757 * The callback is supposed to provide the method that should be protected. | |
758 */ | |
759 bool os::WatcherThreadCrashProtection::call(os::CrashProtectionCallback& cb) { | |
760 assert(Thread::current()->is_Watcher_thread(), "Only for WatcherThread"); | |
761 assert(!WatcherThread::watcher_thread()->has_crash_protection(), | |
762 "crash_protection already set?"); | |
763 | |
764 if (sigsetjmp(_jmpbuf, 1) == 0) { | |
765 // make sure we can see in the signal handler that we have crash protection | |
766 // installed | |
767 WatcherThread::watcher_thread()->set_crash_protection(this); | |
768 cb.call(); | |
769 // and clear the crash protection | |
770 WatcherThread::watcher_thread()->set_crash_protection(NULL); | |
771 return true; | |
772 } | |
773 // this happens when we siglongjmp() back | |
774 WatcherThread::watcher_thread()->set_crash_protection(NULL); | |
775 return false; | |
776 } | |
777 | |
778 void os::WatcherThreadCrashProtection::restore() { | |
779 assert(WatcherThread::watcher_thread()->has_crash_protection(), | |
780 "must have crash protection"); | |
781 | |
782 siglongjmp(_jmpbuf, 1); | |
783 } | |
784 | |
785 void os::WatcherThreadCrashProtection::check_crash_protection(int sig, | |
786 Thread* thread) { | |
787 | |
788 if (thread != NULL && | |
789 thread->is_Watcher_thread() && | |
790 WatcherThread::watcher_thread()->has_crash_protection()) { | |
791 | |
792 if (sig == SIGSEGV || sig == SIGBUS) { | |
793 WatcherThread::watcher_thread()->crash_protection()->restore(); | |
794 } | |
795 } | |
796 } |