ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 28 | // Platform specific code for Linux goes here. For the POSIX comaptible parts |
| 29 | // the implementation is in platform-posix.cc. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 30 | |
| 31 | #include <pthread.h> |
| 32 | #include <semaphore.h> |
| 33 | #include <signal.h> |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 34 | #include <sys/prctl.h> |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | #include <sys/time.h> |
| 36 | #include <sys/resource.h> |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 37 | #include <sys/syscall.h> |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 38 | #include <sys/types.h> |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 39 | #include <stdlib.h> |
| 40 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 41 | #if defined(__GLIBC__) && !defined(__UCLIBC__) |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 42 | #include <execinfo.h> |
| 43 | #include <cxxabi.h> |
| 44 | #endif |
| 45 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 46 | // Ubuntu Dapper requires memory pages to be marked as |
| 47 | // executable. Otherwise, OS raises an exception when executing code |
| 48 | // in that page. |
| 49 | #include <sys/types.h> // mmap & munmap |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 50 | #include <sys/mman.h> // mmap & munmap |
| 51 | #include <sys/stat.h> // open |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 52 | #include <fcntl.h> // open |
| 53 | #include <unistd.h> // sysconf |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 54 | #include <strings.h> // index |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 55 | #include <errno.h> |
| 56 | #include <stdarg.h> |
| 57 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 58 | // GLibc on ARM defines mcontext_t has a typedef for 'struct sigcontext'. |
| 59 | // Old versions of the C library <signal.h> didn't define the type. |
| 60 | #if defined(__ANDROID__) && !defined(__BIONIC_HAVE_UCONTEXT_T) && \ |
| 61 | defined(__arm__) && !defined(__BIONIC_HAVE_STRUCT_SIGCONTEXT) |
| 62 | #include <asm/sigcontext.h> |
| 63 | #endif |
| 64 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 65 | #undef MAP_TYPE |
| 66 | |
| 67 | #include "v8.h" |
| 68 | |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 69 | #include "platform-posix.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 70 | #include "platform.h" |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 71 | #include "v8threads.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 72 | #include "vm-state-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 73 | |
| 74 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 75 | namespace v8 { |
| 76 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 77 | |
| 78 | // 0 is never a valid thread id on Linux since tids and pids share a |
| 79 | // name space and pid 0 is reserved (see man 2 kill). |
| 80 | static const pthread_t kNoThread = (pthread_t) 0; |
| 81 | |
| 82 | |
| 83 | double ceiling(double x) { |
| 84 | return ceil(x); |
| 85 | } |
| 86 | |
| 87 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 88 | static Mutex* limit_mutex = NULL; |
| 89 | |
| 90 | |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 91 | void OS::PostSetUp() { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 92 | POSIXPostSetUp(); |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 96 | uint64_t OS::CpuFeaturesImpliedByPlatform() { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 97 | return 0; // Linux runs on anything. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 101 | #ifdef __arm__ |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 102 | static bool CPUInfoContainsString(const char * search_string) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 103 | const char* file_name = "/proc/cpuinfo"; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 104 | // This is written as a straight shot one pass parser |
| 105 | // and not using STL string and ifstream because, |
| 106 | // on Linux, it's reading from a (non-mmap-able) |
| 107 | // character special device. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 108 | FILE* f = NULL; |
| 109 | const char* what = search_string; |
| 110 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 111 | if (NULL == (f = fopen(file_name, "r"))) { |
| 112 | OS::PrintError("Failed to open /proc/cpuinfo\n"); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 113 | return false; |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 114 | } |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 115 | |
| 116 | int k; |
| 117 | while (EOF != (k = fgetc(f))) { |
| 118 | if (k == *what) { |
| 119 | ++what; |
| 120 | while ((*what != '\0') && (*what == fgetc(f))) { |
| 121 | ++what; |
| 122 | } |
| 123 | if (*what == '\0') { |
| 124 | fclose(f); |
| 125 | return true; |
| 126 | } else { |
| 127 | what = search_string; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | fclose(f); |
| 132 | |
| 133 | // Did not find string in the proc file. |
| 134 | return false; |
| 135 | } |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 136 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 137 | |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 138 | bool OS::ArmCpuHasFeature(CpuFeature feature) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 139 | const char* search_string = NULL; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 140 | // Simple detection of VFP at runtime for Linux. |
| 141 | // It is based on /proc/cpuinfo, which reveals hardware configuration |
| 142 | // to user-space applications. According to ARM (mid 2009), no similar |
| 143 | // facility is universally available on the ARM architectures, |
| 144 | // so it's up to individual OSes to provide such. |
| 145 | switch (feature) { |
| 146 | case VFP3: |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 147 | search_string = "vfpv3"; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 148 | break; |
| 149 | case ARMv7: |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 150 | search_string = "ARMv7"; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 151 | break; |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 152 | case SUDIV: |
| 153 | search_string = "idiva"; |
| 154 | break; |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 155 | case VFP32DREGS: |
| 156 | // This case is handled specially below. |
| 157 | break; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 158 | default: |
| 159 | UNREACHABLE(); |
| 160 | } |
| 161 | |
yangguo@chromium.org | 003650e | 2013-01-24 16:31:08 +0000 | [diff] [blame] | 162 | if (feature == VFP32DREGS) { |
| 163 | return ArmCpuHasFeature(VFP3) && !CPUInfoContainsString("d16"); |
| 164 | } |
| 165 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 166 | if (CPUInfoContainsString(search_string)) { |
| 167 | return true; |
| 168 | } |
| 169 | |
| 170 | if (feature == VFP3) { |
| 171 | // Some old kernels will report vfp not vfpv3. Here we make a last attempt |
| 172 | // to detect vfpv3 by checking for vfp *and* neon, since neon is only |
| 173 | // available on architectures with vfpv3. |
| 174 | // Checking neon on its own is not enough as it is possible to have neon |
| 175 | // without vfp. |
| 176 | if (CPUInfoContainsString("vfp") && CPUInfoContainsString("neon")) { |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 177 | return true; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | return false; |
| 182 | } |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 183 | |
| 184 | |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 185 | CpuImplementer OS::GetCpuImplementer() { |
| 186 | static bool use_cached_value = false; |
| 187 | static CpuImplementer cached_value = UNKNOWN_IMPLEMENTER; |
| 188 | if (use_cached_value) { |
| 189 | return cached_value; |
| 190 | } |
| 191 | if (CPUInfoContainsString("CPU implementer\t: 0x41")) { |
| 192 | cached_value = ARM_IMPLEMENTER; |
| 193 | } else if (CPUInfoContainsString("CPU implementer\t: 0x51")) { |
| 194 | cached_value = QUALCOMM_IMPLEMENTER; |
| 195 | } else { |
| 196 | cached_value = UNKNOWN_IMPLEMENTER; |
| 197 | } |
| 198 | use_cached_value = true; |
| 199 | return cached_value; |
| 200 | } |
| 201 | |
| 202 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 203 | bool OS::ArmUsingHardFloat() { |
yangguo@chromium.org | c74d674 | 2012-06-29 15:15:45 +0000 | [diff] [blame] | 204 | // GCC versions 4.6 and above define __ARM_PCS or __ARM_PCS_VFP to specify |
| 205 | // the Floating Point ABI used (PCS stands for Procedure Call Standard). |
| 206 | // We use these as well as a couple of other defines to statically determine |
| 207 | // what FP ABI used. |
| 208 | // GCC versions 4.4 and below don't support hard-fp. |
| 209 | // GCC versions 4.5 may support hard-fp without defining __ARM_PCS or |
| 210 | // __ARM_PCS_VFP. |
| 211 | |
| 212 | #define GCC_VERSION (__GNUC__ * 10000 \ |
| 213 | + __GNUC_MINOR__ * 100 \ |
| 214 | + __GNUC_PATCHLEVEL__) |
| 215 | #if GCC_VERSION >= 40600 |
| 216 | #if defined(__ARM_PCS_VFP) |
| 217 | return true; |
| 218 | #else |
| 219 | return false; |
| 220 | #endif |
| 221 | |
| 222 | #elif GCC_VERSION < 40500 |
| 223 | return false; |
| 224 | |
| 225 | #else |
| 226 | #if defined(__ARM_PCS_VFP) |
| 227 | return true; |
| 228 | #elif defined(__ARM_PCS) || defined(__SOFTFP) || !defined(__VFP_FP__) |
| 229 | return false; |
| 230 | #else |
| 231 | #error "Your version of GCC does not report the FP ABI compiled for." \ |
| 232 | "Please report it on this issue" \ |
| 233 | "http://code.google.com/p/v8/issues/detail?id=2140" |
| 234 | |
| 235 | #endif |
| 236 | #endif |
| 237 | #undef GCC_VERSION |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 238 | } |
yangguo@chromium.org | c74d674 | 2012-06-29 15:15:45 +0000 | [diff] [blame] | 239 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 240 | #endif // def __arm__ |
| 241 | |
| 242 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 243 | #ifdef __mips__ |
| 244 | bool OS::MipsCpuHasFeature(CpuFeature feature) { |
| 245 | const char* search_string = NULL; |
| 246 | const char* file_name = "/proc/cpuinfo"; |
| 247 | // Simple detection of FPU at runtime for Linux. |
| 248 | // It is based on /proc/cpuinfo, which reveals hardware configuration |
| 249 | // to user-space applications. According to MIPS (early 2010), no similar |
| 250 | // facility is universally available on the MIPS architectures, |
| 251 | // so it's up to individual OSes to provide such. |
| 252 | // |
| 253 | // This is written as a straight shot one pass parser |
| 254 | // and not using STL string and ifstream because, |
| 255 | // on Linux, it's reading from a (non-mmap-able) |
| 256 | // character special device. |
| 257 | |
| 258 | switch (feature) { |
| 259 | case FPU: |
| 260 | search_string = "FPU"; |
| 261 | break; |
| 262 | default: |
| 263 | UNREACHABLE(); |
| 264 | } |
| 265 | |
| 266 | FILE* f = NULL; |
| 267 | const char* what = search_string; |
| 268 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 269 | if (NULL == (f = fopen(file_name, "r"))) { |
| 270 | OS::PrintError("Failed to open /proc/cpuinfo\n"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 271 | return false; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 272 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 273 | |
| 274 | int k; |
| 275 | while (EOF != (k = fgetc(f))) { |
| 276 | if (k == *what) { |
| 277 | ++what; |
| 278 | while ((*what != '\0') && (*what == fgetc(f))) { |
| 279 | ++what; |
| 280 | } |
| 281 | if (*what == '\0') { |
| 282 | fclose(f); |
| 283 | return true; |
| 284 | } else { |
| 285 | what = search_string; |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | fclose(f); |
| 290 | |
| 291 | // Did not find string in the proc file. |
| 292 | return false; |
| 293 | } |
| 294 | #endif // def __mips__ |
| 295 | |
| 296 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 297 | int OS::ActivationFrameAlignment() { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 298 | #ifdef V8_TARGET_ARCH_ARM |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 299 | // On EABI ARM targets this is required for fp correctness in the |
| 300 | // runtime system. |
ager@chromium.org | 3a6061e | 2009-03-12 14:24:36 +0000 | [diff] [blame] | 301 | return 8; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 302 | #elif V8_TARGET_ARCH_MIPS |
| 303 | return 8; |
| 304 | #endif |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 305 | // With gcc 4.4 the tree vectorization optimizer can generate code |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 306 | // that requires 16 byte alignment such as movdqa on x86. |
| 307 | return 16; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 308 | } |
| 309 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 310 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 311 | void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 312 | #if (defined(V8_TARGET_ARCH_ARM) && defined(__arm__)) || \ |
| 313 | (defined(V8_TARGET_ARCH_MIPS) && defined(__mips__)) |
| 314 | // Only use on ARM or MIPS hardware. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 315 | MemoryBarrier(); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 316 | #else |
| 317 | __asm__ __volatile__("" : : : "memory"); |
| 318 | // An x86 store acts as a release barrier. |
| 319 | #endif |
| 320 | *ptr = value; |
| 321 | } |
| 322 | |
| 323 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 324 | const char* OS::LocalTimezone(double time) { |
| 325 | if (isnan(time)) return ""; |
| 326 | time_t tv = static_cast<time_t>(floor(time/msPerSecond)); |
| 327 | struct tm* t = localtime(&tv); |
| 328 | if (NULL == t) return ""; |
| 329 | return t->tm_zone; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | double OS::LocalTimeOffset() { |
| 334 | time_t tv = time(NULL); |
| 335 | struct tm* t = localtime(&tv); |
| 336 | // tm_gmtoff includes any daylight savings offset, so subtract it. |
| 337 | return static_cast<double>(t->tm_gmtoff * msPerSecond - |
| 338 | (t->tm_isdst > 0 ? 3600 * msPerSecond : 0)); |
| 339 | } |
| 340 | |
| 341 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 342 | // We keep the lowest and highest addresses mapped as a quick way of |
| 343 | // determining that pointers are outside the heap (used mostly in assertions |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 344 | // and verification). The estimate is conservative, i.e., not all addresses in |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 345 | // 'allocated' space are actually allocated to our heap. The range is |
| 346 | // [lowest, highest), inclusive on the low and and exclusive on the high end. |
| 347 | static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); |
| 348 | static void* highest_ever_allocated = reinterpret_cast<void*>(0); |
| 349 | |
| 350 | |
| 351 | static void UpdateAllocatedSpaceLimits(void* address, int size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 352 | ASSERT(limit_mutex != NULL); |
| 353 | ScopedLock lock(limit_mutex); |
| 354 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 355 | lowest_ever_allocated = Min(lowest_ever_allocated, address); |
| 356 | highest_ever_allocated = |
| 357 | Max(highest_ever_allocated, |
| 358 | reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | bool OS::IsOutsideAllocatedSpace(void* address) { |
| 363 | return address < lowest_ever_allocated || address >= highest_ever_allocated; |
| 364 | } |
| 365 | |
| 366 | |
| 367 | size_t OS::AllocateAlignment() { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 368 | return sysconf(_SC_PAGESIZE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 372 | void* OS::Allocate(const size_t requested, |
| 373 | size_t* allocated, |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 374 | bool is_executable) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 375 | const size_t msize = RoundUp(requested, AllocateAlignment()); |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 376 | int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 377 | void* addr = OS::GetRandomMmapAddr(); |
ricow@chromium.org | 9fa0967 | 2011-07-25 11:05:35 +0000 | [diff] [blame] | 378 | void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 379 | if (mbase == MAP_FAILED) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 380 | LOG(i::Isolate::Current(), |
| 381 | StringEvent("OS::Allocate", "mmap failed")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 382 | return NULL; |
| 383 | } |
| 384 | *allocated = msize; |
| 385 | UpdateAllocatedSpaceLimits(mbase, msize); |
| 386 | return mbase; |
| 387 | } |
| 388 | |
| 389 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 390 | void OS::Free(void* address, const size_t size) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 391 | // TODO(1240712): munmap has a return value which is ignored here. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 392 | int result = munmap(address, size); |
| 393 | USE(result); |
| 394 | ASSERT(result == 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | |
| 398 | void OS::Sleep(int milliseconds) { |
| 399 | unsigned int ms = static_cast<unsigned int>(milliseconds); |
| 400 | usleep(1000 * ms); |
| 401 | } |
| 402 | |
| 403 | |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 404 | int OS::NumberOfCores() { |
| 405 | return sysconf(_SC_NPROCESSORS_ONLN); |
| 406 | } |
| 407 | |
| 408 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 409 | void OS::Abort() { |
| 410 | // Redirect to std abort to signal abnormal program termination. |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 411 | if (FLAG_break_on_abort) { |
| 412 | DebugBreak(); |
| 413 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 414 | abort(); |
| 415 | } |
| 416 | |
| 417 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 418 | void OS::DebugBreak() { |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 419 | // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x, |
| 420 | // which is the architecture of generated code). |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 421 | #if (defined(__arm__) || defined(__thumb__)) |
| 422 | # if defined(CAN_USE_ARMV5_INSTRUCTIONS) |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 423 | asm("bkpt 0"); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 424 | # endif |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 425 | #elif defined(__mips__) |
| 426 | asm("break"); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 427 | #elif defined(__native_client__) |
| 428 | asm("hlt"); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 429 | #else |
| 430 | asm("int $3"); |
| 431 | #endif |
| 432 | } |
| 433 | |
| 434 | |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 435 | void OS::DumpBacktrace() { |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 436 | #if defined(__GLIBC__) && !defined(__UCLIBC__) |
yangguo@chromium.org | a6bbcc8 | 2012-12-21 12:35:02 +0000 | [diff] [blame] | 437 | void* trace[100]; |
| 438 | int size = backtrace(trace, ARRAY_SIZE(trace)); |
| 439 | char** symbols = backtrace_symbols(trace, size); |
| 440 | fprintf(stderr, "\n==== C stack trace ===============================\n\n"); |
| 441 | if (size == 0) { |
| 442 | fprintf(stderr, "(empty)\n"); |
| 443 | } else if (symbols == NULL) { |
| 444 | fprintf(stderr, "(no symbols)\n"); |
| 445 | } else { |
| 446 | for (int i = 1; i < size; ++i) { |
| 447 | fprintf(stderr, "%2d: ", i); |
| 448 | char mangled[201]; |
| 449 | if (sscanf(symbols[i], "%*[^(]%*[(]%200[^)+]", mangled) == 1) { // NOLINT |
| 450 | int status; |
| 451 | size_t length; |
| 452 | char* demangled = abi::__cxa_demangle(mangled, NULL, &length, &status); |
| 453 | fprintf(stderr, "%s\n", demangled ? demangled : mangled); |
| 454 | free(demangled); |
| 455 | } else { |
| 456 | fprintf(stderr, "??\n"); |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | fflush(stderr); |
| 461 | free(symbols); |
| 462 | #endif |
| 463 | } |
| 464 | |
| 465 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 466 | class PosixMemoryMappedFile : public OS::MemoryMappedFile { |
| 467 | public: |
| 468 | PosixMemoryMappedFile(FILE* file, void* memory, int size) |
| 469 | : file_(file), memory_(memory), size_(size) { } |
| 470 | virtual ~PosixMemoryMappedFile(); |
| 471 | virtual void* memory() { return memory_; } |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 472 | virtual int size() { return size_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 473 | private: |
| 474 | FILE* file_; |
| 475 | void* memory_; |
| 476 | int size_; |
| 477 | }; |
| 478 | |
| 479 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 480 | OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 481 | FILE* file = fopen(name, "r+"); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 482 | if (file == NULL) return NULL; |
| 483 | |
| 484 | fseek(file, 0, SEEK_END); |
| 485 | int size = ftell(file); |
| 486 | |
| 487 | void* memory = |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 488 | mmap(OS::GetRandomMmapAddr(), |
| 489 | size, |
| 490 | PROT_READ | PROT_WRITE, |
| 491 | MAP_SHARED, |
| 492 | fileno(file), |
| 493 | 0); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 494 | return new PosixMemoryMappedFile(file, memory, size); |
| 495 | } |
| 496 | |
| 497 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 498 | OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size, |
| 499 | void* initial) { |
| 500 | FILE* file = fopen(name, "w+"); |
| 501 | if (file == NULL) return NULL; |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 502 | int result = fwrite(initial, size, 1, file); |
| 503 | if (result < 1) { |
| 504 | fclose(file); |
| 505 | return NULL; |
| 506 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 507 | void* memory = |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 508 | mmap(OS::GetRandomMmapAddr(), |
| 509 | size, |
| 510 | PROT_READ | PROT_WRITE, |
| 511 | MAP_SHARED, |
| 512 | fileno(file), |
| 513 | 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 514 | return new PosixMemoryMappedFile(file, memory, size); |
| 515 | } |
| 516 | |
| 517 | |
| 518 | PosixMemoryMappedFile::~PosixMemoryMappedFile() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 519 | if (memory_) OS::Free(memory_, size_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 520 | fclose(file_); |
| 521 | } |
| 522 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 523 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 524 | void OS::LogSharedLibraryAddresses() { |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 525 | // This function assumes that the layout of the file is as follows: |
| 526 | // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] |
| 527 | // If we encounter an unexpected situation we abort scanning further entries. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 528 | FILE* fp = fopen("/proc/self/maps", "r"); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 529 | if (fp == NULL) return; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 530 | |
| 531 | // Allocate enough room to be able to store a full file name. |
| 532 | const int kLibNameLen = FILENAME_MAX + 1; |
| 533 | char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); |
| 534 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 535 | i::Isolate* isolate = ISOLATE; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 536 | // This loop will terminate once the scanning hits an EOF. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 537 | while (true) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 538 | uintptr_t start, end; |
| 539 | char attr_r, attr_w, attr_x, attr_p; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 540 | // Parse the addresses and permission bits at the beginning of the line. |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 541 | if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; |
| 542 | if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 543 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 544 | int c; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 545 | if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { |
| 546 | // Found a read-only executable entry. Skip characters until we reach |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 547 | // the beginning of the filename or the end of the line. |
| 548 | do { |
| 549 | c = getc(fp); |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 550 | } while ((c != EOF) && (c != '\n') && (c != '/') && (c != '[')); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 551 | if (c == EOF) break; // EOF: Was unexpected, just exit. |
| 552 | |
| 553 | // Process the filename if found. |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 554 | if ((c == '/') || (c == '[')) { |
| 555 | // Push the '/' or '[' back into the stream to be read below. |
| 556 | ungetc(c, fp); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 557 | |
| 558 | // Read to the end of the line. Exit if the read fails. |
| 559 | if (fgets(lib_name, kLibNameLen, fp) == NULL) break; |
| 560 | |
| 561 | // Drop the newline character read by fgets. We do not need to check |
| 562 | // for a zero-length string because we know that we at least read the |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 563 | // '/' or '[' character. |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 564 | lib_name[strlen(lib_name) - 1] = '\0'; |
| 565 | } else { |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 566 | // No library name found, just record the raw address range. |
| 567 | snprintf(lib_name, kLibNameLen, |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 568 | "%08" V8PRIxPTR "-%08" V8PRIxPTR, start, end); |
| 569 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 570 | LOG(isolate, SharedLibraryEvent(lib_name, start, end)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 571 | } else { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 572 | // Entry not describing executable data. Skip to end of line to set up |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 573 | // reading the next entry. |
| 574 | do { |
| 575 | c = getc(fp); |
| 576 | } while ((c != EOF) && (c != '\n')); |
| 577 | if (c == EOF) break; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 578 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 579 | } |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 580 | free(lib_name); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 581 | fclose(fp); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 585 | void OS::SignalCodeMovingGC() { |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 586 | // Support for ll_prof.py. |
| 587 | // |
| 588 | // The Linux profiler built into the kernel logs all mmap's with |
| 589 | // PROT_EXEC so that analysis tools can properly attribute ticks. We |
| 590 | // do a mmap with a name known by ll_prof.py and immediately munmap |
| 591 | // it. This injects a GC marker into the stream of events generated |
| 592 | // by the kernel and allows us to synchronize V8 code log and the |
| 593 | // kernel log. |
| 594 | int size = sysconf(_SC_PAGESIZE); |
mstarzinger@chromium.org | de88679 | 2012-09-11 13:22:37 +0000 | [diff] [blame] | 595 | FILE* f = fopen(FLAG_gc_fake_mmap, "w+"); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 596 | void* addr = mmap(OS::GetRandomMmapAddr(), |
| 597 | size, |
| 598 | PROT_READ | PROT_EXEC, |
| 599 | MAP_PRIVATE, |
| 600 | fileno(f), |
| 601 | 0); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 602 | ASSERT(addr != MAP_FAILED); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 603 | OS::Free(addr, size); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 604 | fclose(f); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 608 | int OS::StackWalk(Vector<OS::StackFrame> frames) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 609 | // backtrace is a glibc extension. |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 610 | #if defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 611 | int frames_size = frames.length(); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 612 | ScopedVector<void*> addresses(frames_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 613 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 614 | int frames_count = backtrace(addresses.start(), frames_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 615 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 616 | char** symbols = backtrace_symbols(addresses.start(), frames_count); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 617 | if (symbols == NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 618 | return kStackWalkError; |
| 619 | } |
| 620 | |
| 621 | for (int i = 0; i < frames_count; i++) { |
| 622 | frames[i].address = addresses[i]; |
| 623 | // Format a text representation of the frame based on the information |
| 624 | // available. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 625 | SNPrintF(MutableCStrVector(frames[i].text, kStackWalkMaxTextLen), |
| 626 | "%s", |
| 627 | symbols[i]); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 628 | // Make sure line termination is in place. |
| 629 | frames[i].text[kStackWalkMaxTextLen - 1] = '\0'; |
| 630 | } |
| 631 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 632 | free(symbols); |
| 633 | |
| 634 | return frames_count; |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 635 | #else // defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 636 | return 0; |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 637 | #endif // defined(__GLIBC__) && !defined(__UCLIBC__) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | |
| 641 | // Constants used for mmap. |
| 642 | static const int kMmapFd = -1; |
| 643 | static const int kMmapFdOffset = 0; |
| 644 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 645 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 646 | VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 647 | |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 648 | |
| 649 | VirtualMemory::VirtualMemory(size_t size) |
| 650 | : address_(ReserveRegion(size)), size_(size) { } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 651 | |
| 652 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 653 | VirtualMemory::VirtualMemory(size_t size, size_t alignment) |
| 654 | : address_(NULL), size_(0) { |
| 655 | ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); |
| 656 | size_t request_size = RoundUp(size + alignment, |
| 657 | static_cast<intptr_t>(OS::AllocateAlignment())); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 658 | void* reservation = mmap(OS::GetRandomMmapAddr(), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 659 | request_size, |
| 660 | PROT_NONE, |
| 661 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, |
| 662 | kMmapFd, |
| 663 | kMmapFdOffset); |
| 664 | if (reservation == MAP_FAILED) return; |
| 665 | |
| 666 | Address base = static_cast<Address>(reservation); |
| 667 | Address aligned_base = RoundUp(base, alignment); |
| 668 | ASSERT_LE(base, aligned_base); |
| 669 | |
| 670 | // Unmap extra memory reserved before and after the desired block. |
| 671 | if (aligned_base != base) { |
| 672 | size_t prefix_size = static_cast<size_t>(aligned_base - base); |
| 673 | OS::Free(base, prefix_size); |
| 674 | request_size -= prefix_size; |
| 675 | } |
| 676 | |
| 677 | size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); |
| 678 | ASSERT_LE(aligned_size, request_size); |
| 679 | |
| 680 | if (aligned_size != request_size) { |
| 681 | size_t suffix_size = request_size - aligned_size; |
| 682 | OS::Free(aligned_base + aligned_size, suffix_size); |
| 683 | request_size -= suffix_size; |
| 684 | } |
| 685 | |
| 686 | ASSERT(aligned_size == request_size); |
| 687 | |
| 688 | address_ = static_cast<void*>(aligned_base); |
| 689 | size_ = aligned_size; |
| 690 | } |
| 691 | |
| 692 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 693 | VirtualMemory::~VirtualMemory() { |
| 694 | if (IsReserved()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 695 | bool result = ReleaseRegion(address(), size()); |
| 696 | ASSERT(result); |
| 697 | USE(result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 698 | } |
| 699 | } |
| 700 | |
| 701 | |
| 702 | bool VirtualMemory::IsReserved() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 703 | return address_ != NULL; |
| 704 | } |
| 705 | |
| 706 | |
| 707 | void VirtualMemory::Reset() { |
| 708 | address_ = NULL; |
| 709 | size_ = 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 713 | bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 714 | return CommitRegion(address, size, is_executable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | |
| 718 | bool VirtualMemory::Uncommit(void* address, size_t size) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 719 | return UncommitRegion(address, size); |
| 720 | } |
| 721 | |
| 722 | |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 723 | bool VirtualMemory::Guard(void* address) { |
| 724 | OS::Guard(address, OS::CommitPageSize()); |
| 725 | return true; |
| 726 | } |
| 727 | |
| 728 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 729 | void* VirtualMemory::ReserveRegion(size_t size) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 730 | void* result = mmap(OS::GetRandomMmapAddr(), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 731 | size, |
| 732 | PROT_NONE, |
| 733 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, |
| 734 | kMmapFd, |
| 735 | kMmapFdOffset); |
| 736 | |
| 737 | if (result == MAP_FAILED) return NULL; |
| 738 | |
| 739 | return result; |
| 740 | } |
| 741 | |
| 742 | |
| 743 | bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) { |
| 744 | int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
| 745 | if (MAP_FAILED == mmap(base, |
| 746 | size, |
| 747 | prot, |
| 748 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, |
| 749 | kMmapFd, |
| 750 | kMmapFdOffset)) { |
| 751 | return false; |
| 752 | } |
| 753 | |
| 754 | UpdateAllocatedSpaceLimits(base, size); |
| 755 | return true; |
| 756 | } |
| 757 | |
| 758 | |
| 759 | bool VirtualMemory::UncommitRegion(void* base, size_t size) { |
| 760 | return mmap(base, |
| 761 | size, |
| 762 | PROT_NONE, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 763 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 764 | kMmapFd, |
| 765 | kMmapFdOffset) != MAP_FAILED; |
| 766 | } |
| 767 | |
| 768 | |
| 769 | bool VirtualMemory::ReleaseRegion(void* base, size_t size) { |
| 770 | return munmap(base, size) == 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 774 | bool VirtualMemory::HasLazyCommits() { |
| 775 | return true; |
| 776 | } |
| 777 | |
| 778 | |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 779 | class Thread::PlatformData : public Malloced { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 780 | public: |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 781 | PlatformData() : thread_(kNoThread) {} |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 782 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 783 | pthread_t thread_; // Thread handle for pthread. |
| 784 | }; |
| 785 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 786 | Thread::Thread(const Options& options) |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 787 | : data_(new PlatformData()), |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 788 | stack_size_(options.stack_size()), |
| 789 | start_semaphore_(NULL) { |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 790 | set_name(options.name()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 791 | } |
| 792 | |
| 793 | |
| 794 | Thread::~Thread() { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 795 | delete data_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | |
| 799 | static void* ThreadEntry(void* arg) { |
| 800 | Thread* thread = reinterpret_cast<Thread*>(arg); |
| 801 | // This is also initialized by the first argument to pthread_create() but we |
| 802 | // don't know which thread will run first (the original thread or the new |
| 803 | // one) so we initialize it here too. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 804 | #ifdef PR_SET_NAME |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 805 | prctl(PR_SET_NAME, |
| 806 | reinterpret_cast<unsigned long>(thread->name()), // NOLINT |
| 807 | 0, 0, 0); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 808 | #endif |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 809 | thread->data()->thread_ = pthread_self(); |
| 810 | ASSERT(thread->data()->thread_ != kNoThread); |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 811 | thread->NotifyStartedAndRun(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 812 | return NULL; |
| 813 | } |
| 814 | |
| 815 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 816 | void Thread::set_name(const char* name) { |
| 817 | strncpy(name_, name, sizeof(name_)); |
| 818 | name_[sizeof(name_) - 1] = '\0'; |
| 819 | } |
| 820 | |
| 821 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 822 | void Thread::Start() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 823 | pthread_attr_t* attr_ptr = NULL; |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 824 | #if defined(__native_client__) |
| 825 | // use default stack size. |
| 826 | #else |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 827 | pthread_attr_t attr; |
| 828 | if (stack_size_ > 0) { |
| 829 | pthread_attr_init(&attr); |
| 830 | pthread_attr_setstacksize(&attr, static_cast<size_t>(stack_size_)); |
| 831 | attr_ptr = &attr; |
| 832 | } |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame^] | 833 | #endif |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 834 | int result = pthread_create(&data_->thread_, attr_ptr, ThreadEntry, this); |
| 835 | CHECK_EQ(0, result); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 836 | ASSERT(data_->thread_ != kNoThread); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | |
| 840 | void Thread::Join() { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 841 | pthread_join(data_->thread_, NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | |
| 845 | Thread::LocalStorageKey Thread::CreateThreadLocalKey() { |
| 846 | pthread_key_t key; |
| 847 | int result = pthread_key_create(&key, NULL); |
| 848 | USE(result); |
| 849 | ASSERT(result == 0); |
| 850 | return static_cast<LocalStorageKey>(key); |
| 851 | } |
| 852 | |
| 853 | |
| 854 | void Thread::DeleteThreadLocalKey(LocalStorageKey key) { |
| 855 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 856 | int result = pthread_key_delete(pthread_key); |
| 857 | USE(result); |
| 858 | ASSERT(result == 0); |
| 859 | } |
| 860 | |
| 861 | |
| 862 | void* Thread::GetThreadLocal(LocalStorageKey key) { |
| 863 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 864 | return pthread_getspecific(pthread_key); |
| 865 | } |
| 866 | |
| 867 | |
| 868 | void Thread::SetThreadLocal(LocalStorageKey key, void* value) { |
| 869 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 870 | pthread_setspecific(pthread_key, value); |
| 871 | } |
| 872 | |
| 873 | |
| 874 | void Thread::YieldCPU() { |
| 875 | sched_yield(); |
| 876 | } |
| 877 | |
| 878 | |
| 879 | class LinuxMutex : public Mutex { |
| 880 | public: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 881 | LinuxMutex() { |
| 882 | pthread_mutexattr_t attrs; |
| 883 | int result = pthread_mutexattr_init(&attrs); |
| 884 | ASSERT(result == 0); |
| 885 | result = pthread_mutexattr_settype(&attrs, PTHREAD_MUTEX_RECURSIVE); |
| 886 | ASSERT(result == 0); |
| 887 | result = pthread_mutex_init(&mutex_, &attrs); |
| 888 | ASSERT(result == 0); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 889 | USE(result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | virtual ~LinuxMutex() { pthread_mutex_destroy(&mutex_); } |
| 893 | |
| 894 | virtual int Lock() { |
| 895 | int result = pthread_mutex_lock(&mutex_); |
| 896 | return result; |
| 897 | } |
| 898 | |
| 899 | virtual int Unlock() { |
| 900 | int result = pthread_mutex_unlock(&mutex_); |
| 901 | return result; |
| 902 | } |
| 903 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 904 | virtual bool TryLock() { |
| 905 | int result = pthread_mutex_trylock(&mutex_); |
| 906 | // Return false if the lock is busy and locking failed. |
| 907 | if (result == EBUSY) { |
| 908 | return false; |
| 909 | } |
| 910 | ASSERT(result == 0); // Verify no other errors. |
| 911 | return true; |
| 912 | } |
| 913 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 914 | private: |
| 915 | pthread_mutex_t mutex_; // Pthread mutex for POSIX platforms. |
| 916 | }; |
| 917 | |
| 918 | |
| 919 | Mutex* OS::CreateMutex() { |
| 920 | return new LinuxMutex(); |
| 921 | } |
| 922 | |
| 923 | |
| 924 | class LinuxSemaphore : public Semaphore { |
| 925 | public: |
| 926 | explicit LinuxSemaphore(int count) { sem_init(&sem_, 0, count); } |
| 927 | virtual ~LinuxSemaphore() { sem_destroy(&sem_); } |
| 928 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 929 | virtual void Wait(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 930 | virtual bool Wait(int timeout); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 931 | virtual void Signal() { sem_post(&sem_); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 932 | private: |
| 933 | sem_t sem_; |
| 934 | }; |
| 935 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 936 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 937 | void LinuxSemaphore::Wait() { |
| 938 | while (true) { |
| 939 | int result = sem_wait(&sem_); |
| 940 | if (result == 0) return; // Successfully got semaphore. |
| 941 | CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup. |
| 942 | } |
| 943 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 944 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 945 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 946 | #ifndef TIMEVAL_TO_TIMESPEC |
| 947 | #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \ |
| 948 | (ts)->tv_sec = (tv)->tv_sec; \ |
| 949 | (ts)->tv_nsec = (tv)->tv_usec * 1000; \ |
| 950 | } while (false) |
| 951 | #endif |
| 952 | |
| 953 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 954 | bool LinuxSemaphore::Wait(int timeout) { |
| 955 | const long kOneSecondMicros = 1000000; // NOLINT |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 956 | |
| 957 | // Split timeout into second and nanosecond parts. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 958 | struct timeval delta; |
| 959 | delta.tv_usec = timeout % kOneSecondMicros; |
| 960 | delta.tv_sec = timeout / kOneSecondMicros; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 961 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 962 | struct timeval current_time; |
| 963 | // Get the current time. |
| 964 | if (gettimeofday(¤t_time, NULL) == -1) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 965 | return false; |
| 966 | } |
| 967 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 968 | // Calculate time for end of timeout. |
| 969 | struct timeval end_time; |
| 970 | timeradd(¤t_time, &delta, &end_time); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 971 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 972 | struct timespec ts; |
| 973 | TIMEVAL_TO_TIMESPEC(&end_time, &ts); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 974 | // Wait for semaphore signalled or timeout. |
| 975 | while (true) { |
| 976 | int result = sem_timedwait(&sem_, &ts); |
| 977 | if (result == 0) return true; // Successfully got semaphore. |
| 978 | if (result > 0) { |
| 979 | // For glibc prior to 2.3.4 sem_timedwait returns the error instead of -1. |
| 980 | errno = result; |
| 981 | result = -1; |
| 982 | } |
| 983 | if (result == -1 && errno == ETIMEDOUT) return false; // Timeout. |
| 984 | CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup. |
| 985 | } |
| 986 | } |
| 987 | |
| 988 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 989 | Semaphore* OS::CreateSemaphore(int count) { |
| 990 | return new LinuxSemaphore(count); |
| 991 | } |
| 992 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 993 | |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 994 | void OS::SetUp() { |
| 995 | // Seed the random number generator. We preserve microsecond resolution. |
| 996 | uint64_t seed = Ticks() ^ (getpid() << 16); |
| 997 | srandom(static_cast<unsigned int>(seed)); |
| 998 | limit_mutex = CreateMutex(); |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 999 | } |
| 1000 | |
| 1001 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1002 | void OS::TearDown() { |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1003 | delete limit_mutex; |
| 1004 | } |
| 1005 | |
| 1006 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1007 | } } // namespace v8::internal |