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 |
|---|---|
| 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 } |