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 | |
| 41 | // Ubuntu Dapper requires memory pages to be marked as |
| 42 | // executable. Otherwise, OS raises an exception when executing code |
| 43 | // in that page. |
| 44 | #include <sys/types.h> // mmap & munmap |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 45 | #include <sys/mman.h> // mmap & munmap |
| 46 | #include <sys/stat.h> // open |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 47 | #include <fcntl.h> // open |
| 48 | #include <unistd.h> // sysconf |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 49 | #if defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 50 | #include <execinfo.h> // backtrace, backtrace_symbols |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 51 | #endif // defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 52 | #include <strings.h> // index |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 53 | #include <errno.h> |
| 54 | #include <stdarg.h> |
| 55 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 56 | // GLibc on ARM defines mcontext_t has a typedef for 'struct sigcontext'. |
| 57 | // Old versions of the C library <signal.h> didn't define the type. |
| 58 | #if defined(__ANDROID__) && !defined(__BIONIC_HAVE_UCONTEXT_T) && \ |
| 59 | defined(__arm__) && !defined(__BIONIC_HAVE_STRUCT_SIGCONTEXT) |
| 60 | #include <asm/sigcontext.h> |
| 61 | #endif |
| 62 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 63 | #undef MAP_TYPE |
| 64 | |
| 65 | #include "v8.h" |
| 66 | |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 67 | #include "platform-posix.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 68 | #include "platform.h" |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 69 | #include "v8threads.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 70 | #include "vm-state-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 71 | |
| 72 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 73 | namespace v8 { |
| 74 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 75 | |
| 76 | // 0 is never a valid thread id on Linux since tids and pids share a |
| 77 | // name space and pid 0 is reserved (see man 2 kill). |
| 78 | static const pthread_t kNoThread = (pthread_t) 0; |
| 79 | |
| 80 | |
| 81 | double ceiling(double x) { |
| 82 | return ceil(x); |
| 83 | } |
| 84 | |
| 85 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 86 | static Mutex* limit_mutex = NULL; |
| 87 | |
| 88 | |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 89 | void OS::PostSetUp() { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 90 | POSIXPostSetUp(); |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 94 | uint64_t OS::CpuFeaturesImpliedByPlatform() { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 95 | return 0; // Linux runs on anything. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 99 | #ifdef __arm__ |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 100 | static bool CPUInfoContainsString(const char * search_string) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 101 | const char* file_name = "/proc/cpuinfo"; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 102 | // This is written as a straight shot one pass parser |
| 103 | // and not using STL string and ifstream because, |
| 104 | // on Linux, it's reading from a (non-mmap-able) |
| 105 | // character special device. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 106 | FILE* f = NULL; |
| 107 | const char* what = search_string; |
| 108 | |
| 109 | if (NULL == (f = fopen(file_name, "r"))) |
| 110 | return false; |
| 111 | |
| 112 | int k; |
| 113 | while (EOF != (k = fgetc(f))) { |
| 114 | if (k == *what) { |
| 115 | ++what; |
| 116 | while ((*what != '\0') && (*what == fgetc(f))) { |
| 117 | ++what; |
| 118 | } |
| 119 | if (*what == '\0') { |
| 120 | fclose(f); |
| 121 | return true; |
| 122 | } else { |
| 123 | what = search_string; |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | fclose(f); |
| 128 | |
| 129 | // Did not find string in the proc file. |
| 130 | return false; |
| 131 | } |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 132 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 133 | |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 134 | bool OS::ArmCpuHasFeature(CpuFeature feature) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 135 | const char* search_string = NULL; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 136 | // Simple detection of VFP at runtime for Linux. |
| 137 | // It is based on /proc/cpuinfo, which reveals hardware configuration |
| 138 | // to user-space applications. According to ARM (mid 2009), no similar |
| 139 | // facility is universally available on the ARM architectures, |
| 140 | // so it's up to individual OSes to provide such. |
| 141 | switch (feature) { |
verwaest@chromium.org | b6d052d | 2012-07-27 08:03:27 +0000 | [diff] [blame] | 142 | case VFP2: |
| 143 | search_string = "vfp"; |
| 144 | break; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 145 | case VFP3: |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 146 | search_string = "vfpv3"; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 147 | break; |
| 148 | case ARMv7: |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 149 | search_string = "ARMv7"; |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 150 | break; |
| 151 | default: |
| 152 | UNREACHABLE(); |
| 153 | } |
| 154 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 155 | if (CPUInfoContainsString(search_string)) { |
| 156 | return true; |
| 157 | } |
| 158 | |
| 159 | if (feature == VFP3) { |
| 160 | // Some old kernels will report vfp not vfpv3. Here we make a last attempt |
| 161 | // to detect vfpv3 by checking for vfp *and* neon, since neon is only |
| 162 | // available on architectures with vfpv3. |
| 163 | // Checking neon on its own is not enough as it is possible to have neon |
| 164 | // without vfp. |
| 165 | if (CPUInfoContainsString("vfp") && CPUInfoContainsString("neon")) { |
lrn@chromium.org | fa943b7 | 2010-11-03 08:14:36 +0000 | [diff] [blame] | 166 | return true; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | return false; |
| 171 | } |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 172 | |
| 173 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 174 | bool OS::ArmUsingHardFloat() { |
yangguo@chromium.org | c74d674 | 2012-06-29 15:15:45 +0000 | [diff] [blame] | 175 | // GCC versions 4.6 and above define __ARM_PCS or __ARM_PCS_VFP to specify |
| 176 | // the Floating Point ABI used (PCS stands for Procedure Call Standard). |
| 177 | // We use these as well as a couple of other defines to statically determine |
| 178 | // what FP ABI used. |
| 179 | // GCC versions 4.4 and below don't support hard-fp. |
| 180 | // GCC versions 4.5 may support hard-fp without defining __ARM_PCS or |
| 181 | // __ARM_PCS_VFP. |
| 182 | |
| 183 | #define GCC_VERSION (__GNUC__ * 10000 \ |
| 184 | + __GNUC_MINOR__ * 100 \ |
| 185 | + __GNUC_PATCHLEVEL__) |
| 186 | #if GCC_VERSION >= 40600 |
| 187 | #if defined(__ARM_PCS_VFP) |
| 188 | return true; |
| 189 | #else |
| 190 | return false; |
| 191 | #endif |
| 192 | |
| 193 | #elif GCC_VERSION < 40500 |
| 194 | return false; |
| 195 | |
| 196 | #else |
| 197 | #if defined(__ARM_PCS_VFP) |
| 198 | return true; |
| 199 | #elif defined(__ARM_PCS) || defined(__SOFTFP) || !defined(__VFP_FP__) |
| 200 | return false; |
| 201 | #else |
| 202 | #error "Your version of GCC does not report the FP ABI compiled for." \ |
| 203 | "Please report it on this issue" \ |
| 204 | "http://code.google.com/p/v8/issues/detail?id=2140" |
| 205 | |
| 206 | #endif |
| 207 | #endif |
| 208 | #undef GCC_VERSION |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 209 | } |
yangguo@chromium.org | c74d674 | 2012-06-29 15:15:45 +0000 | [diff] [blame] | 210 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 211 | #endif // def __arm__ |
| 212 | |
| 213 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 214 | #ifdef __mips__ |
| 215 | bool OS::MipsCpuHasFeature(CpuFeature feature) { |
| 216 | const char* search_string = NULL; |
| 217 | const char* file_name = "/proc/cpuinfo"; |
| 218 | // Simple detection of FPU at runtime for Linux. |
| 219 | // It is based on /proc/cpuinfo, which reveals hardware configuration |
| 220 | // to user-space applications. According to MIPS (early 2010), no similar |
| 221 | // facility is universally available on the MIPS architectures, |
| 222 | // so it's up to individual OSes to provide such. |
| 223 | // |
| 224 | // This is written as a straight shot one pass parser |
| 225 | // and not using STL string and ifstream because, |
| 226 | // on Linux, it's reading from a (non-mmap-able) |
| 227 | // character special device. |
| 228 | |
| 229 | switch (feature) { |
| 230 | case FPU: |
| 231 | search_string = "FPU"; |
| 232 | break; |
| 233 | default: |
| 234 | UNREACHABLE(); |
| 235 | } |
| 236 | |
| 237 | FILE* f = NULL; |
| 238 | const char* what = search_string; |
| 239 | |
| 240 | if (NULL == (f = fopen(file_name, "r"))) |
| 241 | return false; |
| 242 | |
| 243 | int k; |
| 244 | while (EOF != (k = fgetc(f))) { |
| 245 | if (k == *what) { |
| 246 | ++what; |
| 247 | while ((*what != '\0') && (*what == fgetc(f))) { |
| 248 | ++what; |
| 249 | } |
| 250 | if (*what == '\0') { |
| 251 | fclose(f); |
| 252 | return true; |
| 253 | } else { |
| 254 | what = search_string; |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | fclose(f); |
| 259 | |
| 260 | // Did not find string in the proc file. |
| 261 | return false; |
| 262 | } |
| 263 | #endif // def __mips__ |
| 264 | |
| 265 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 266 | int OS::ActivationFrameAlignment() { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 267 | #ifdef V8_TARGET_ARCH_ARM |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 268 | // On EABI ARM targets this is required for fp correctness in the |
| 269 | // runtime system. |
ager@chromium.org | 3a6061e | 2009-03-12 14:24:36 +0000 | [diff] [blame] | 270 | return 8; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 271 | #elif V8_TARGET_ARCH_MIPS |
| 272 | return 8; |
| 273 | #endif |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 274 | // With gcc 4.4 the tree vectorization optimizer can generate code |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 275 | // that requires 16 byte alignment such as movdqa on x86. |
| 276 | return 16; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 277 | } |
| 278 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 279 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 280 | void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 281 | #if (defined(V8_TARGET_ARCH_ARM) && defined(__arm__)) || \ |
| 282 | (defined(V8_TARGET_ARCH_MIPS) && defined(__mips__)) |
| 283 | // Only use on ARM or MIPS hardware. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 284 | MemoryBarrier(); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 285 | #else |
| 286 | __asm__ __volatile__("" : : : "memory"); |
| 287 | // An x86 store acts as a release barrier. |
| 288 | #endif |
| 289 | *ptr = value; |
| 290 | } |
| 291 | |
| 292 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 293 | const char* OS::LocalTimezone(double time) { |
| 294 | if (isnan(time)) return ""; |
| 295 | time_t tv = static_cast<time_t>(floor(time/msPerSecond)); |
| 296 | struct tm* t = localtime(&tv); |
| 297 | if (NULL == t) return ""; |
| 298 | return t->tm_zone; |
| 299 | } |
| 300 | |
| 301 | |
| 302 | double OS::LocalTimeOffset() { |
| 303 | time_t tv = time(NULL); |
| 304 | struct tm* t = localtime(&tv); |
| 305 | // tm_gmtoff includes any daylight savings offset, so subtract it. |
| 306 | return static_cast<double>(t->tm_gmtoff * msPerSecond - |
| 307 | (t->tm_isdst > 0 ? 3600 * msPerSecond : 0)); |
| 308 | } |
| 309 | |
| 310 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 311 | // We keep the lowest and highest addresses mapped as a quick way of |
| 312 | // determining that pointers are outside the heap (used mostly in assertions |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 313 | // 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] | 314 | // 'allocated' space are actually allocated to our heap. The range is |
| 315 | // [lowest, highest), inclusive on the low and and exclusive on the high end. |
| 316 | static void* lowest_ever_allocated = reinterpret_cast<void*>(-1); |
| 317 | static void* highest_ever_allocated = reinterpret_cast<void*>(0); |
| 318 | |
| 319 | |
| 320 | static void UpdateAllocatedSpaceLimits(void* address, int size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 321 | ASSERT(limit_mutex != NULL); |
| 322 | ScopedLock lock(limit_mutex); |
| 323 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 324 | lowest_ever_allocated = Min(lowest_ever_allocated, address); |
| 325 | highest_ever_allocated = |
| 326 | Max(highest_ever_allocated, |
| 327 | reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size)); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | bool OS::IsOutsideAllocatedSpace(void* address) { |
| 332 | return address < lowest_ever_allocated || address >= highest_ever_allocated; |
| 333 | } |
| 334 | |
| 335 | |
| 336 | size_t OS::AllocateAlignment() { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 337 | return sysconf(_SC_PAGESIZE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 341 | void* OS::Allocate(const size_t requested, |
| 342 | size_t* allocated, |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 343 | bool is_executable) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 344 | const size_t msize = RoundUp(requested, AllocateAlignment()); |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 345 | int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 346 | void* addr = OS::GetRandomMmapAddr(); |
ricow@chromium.org | 9fa0967 | 2011-07-25 11:05:35 +0000 | [diff] [blame] | 347 | 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] | 348 | if (mbase == MAP_FAILED) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 349 | LOG(i::Isolate::Current(), |
| 350 | StringEvent("OS::Allocate", "mmap failed")); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 351 | return NULL; |
| 352 | } |
| 353 | *allocated = msize; |
| 354 | UpdateAllocatedSpaceLimits(mbase, msize); |
| 355 | return mbase; |
| 356 | } |
| 357 | |
| 358 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 359 | void OS::Free(void* address, const size_t size) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 360 | // TODO(1240712): munmap has a return value which is ignored here. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 361 | int result = munmap(address, size); |
| 362 | USE(result); |
| 363 | ASSERT(result == 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | |
| 367 | void OS::Sleep(int milliseconds) { |
| 368 | unsigned int ms = static_cast<unsigned int>(milliseconds); |
| 369 | usleep(1000 * ms); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | void OS::Abort() { |
| 374 | // Redirect to std abort to signal abnormal program termination. |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 375 | if (FLAG_break_on_abort) { |
| 376 | DebugBreak(); |
| 377 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 378 | abort(); |
| 379 | } |
| 380 | |
| 381 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 382 | void OS::DebugBreak() { |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 383 | // TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x, |
| 384 | // which is the architecture of generated code). |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 385 | #if (defined(__arm__) || defined(__thumb__)) |
| 386 | # if defined(CAN_USE_ARMV5_INSTRUCTIONS) |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 387 | asm("bkpt 0"); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 388 | # endif |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 389 | #elif defined(__mips__) |
| 390 | asm("break"); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 391 | #else |
| 392 | asm("int $3"); |
| 393 | #endif |
| 394 | } |
| 395 | |
| 396 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 397 | class PosixMemoryMappedFile : public OS::MemoryMappedFile { |
| 398 | public: |
| 399 | PosixMemoryMappedFile(FILE* file, void* memory, int size) |
| 400 | : file_(file), memory_(memory), size_(size) { } |
| 401 | virtual ~PosixMemoryMappedFile(); |
| 402 | virtual void* memory() { return memory_; } |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 403 | virtual int size() { return size_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 404 | private: |
| 405 | FILE* file_; |
| 406 | void* memory_; |
| 407 | int size_; |
| 408 | }; |
| 409 | |
| 410 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 411 | OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) { |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 412 | FILE* file = fopen(name, "r+"); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 413 | if (file == NULL) return NULL; |
| 414 | |
| 415 | fseek(file, 0, SEEK_END); |
| 416 | int size = ftell(file); |
| 417 | |
| 418 | void* memory = |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 419 | mmap(OS::GetRandomMmapAddr(), |
| 420 | size, |
| 421 | PROT_READ | PROT_WRITE, |
| 422 | MAP_SHARED, |
| 423 | fileno(file), |
| 424 | 0); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 425 | return new PosixMemoryMappedFile(file, memory, size); |
| 426 | } |
| 427 | |
| 428 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 429 | OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size, |
| 430 | void* initial) { |
| 431 | FILE* file = fopen(name, "w+"); |
| 432 | if (file == NULL) return NULL; |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 433 | int result = fwrite(initial, size, 1, file); |
| 434 | if (result < 1) { |
| 435 | fclose(file); |
| 436 | return NULL; |
| 437 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 438 | void* memory = |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 439 | mmap(OS::GetRandomMmapAddr(), |
| 440 | size, |
| 441 | PROT_READ | PROT_WRITE, |
| 442 | MAP_SHARED, |
| 443 | fileno(file), |
| 444 | 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 445 | return new PosixMemoryMappedFile(file, memory, size); |
| 446 | } |
| 447 | |
| 448 | |
| 449 | PosixMemoryMappedFile::~PosixMemoryMappedFile() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 450 | if (memory_) OS::Free(memory_, size_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 451 | fclose(file_); |
| 452 | } |
| 453 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 454 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 455 | void OS::LogSharedLibraryAddresses() { |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 456 | // This function assumes that the layout of the file is as follows: |
| 457 | // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name] |
| 458 | // If we encounter an unexpected situation we abort scanning further entries. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 459 | FILE* fp = fopen("/proc/self/maps", "r"); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 460 | if (fp == NULL) return; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 461 | |
| 462 | // Allocate enough room to be able to store a full file name. |
| 463 | const int kLibNameLen = FILENAME_MAX + 1; |
| 464 | char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen)); |
| 465 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 466 | i::Isolate* isolate = ISOLATE; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 467 | // This loop will terminate once the scanning hits an EOF. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 468 | while (true) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 469 | uintptr_t start, end; |
| 470 | char attr_r, attr_w, attr_x, attr_p; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 471 | // 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] | 472 | if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break; |
| 473 | 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] | 474 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 475 | int c; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 476 | if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') { |
| 477 | // Found a read-only executable entry. Skip characters until we reach |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 478 | // the beginning of the filename or the end of the line. |
| 479 | do { |
| 480 | c = getc(fp); |
| 481 | } while ((c != EOF) && (c != '\n') && (c != '/')); |
| 482 | if (c == EOF) break; // EOF: Was unexpected, just exit. |
| 483 | |
| 484 | // Process the filename if found. |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 485 | if (c == '/') { |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 486 | ungetc(c, fp); // Push the '/' back into the stream to be read below. |
| 487 | |
| 488 | // Read to the end of the line. Exit if the read fails. |
| 489 | if (fgets(lib_name, kLibNameLen, fp) == NULL) break; |
| 490 | |
| 491 | // Drop the newline character read by fgets. We do not need to check |
| 492 | // for a zero-length string because we know that we at least read the |
| 493 | // '/' character. |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 494 | lib_name[strlen(lib_name) - 1] = '\0'; |
| 495 | } else { |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 496 | // No library name found, just record the raw address range. |
| 497 | snprintf(lib_name, kLibNameLen, |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 498 | "%08" V8PRIxPTR "-%08" V8PRIxPTR, start, end); |
| 499 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 500 | LOG(isolate, SharedLibraryEvent(lib_name, start, end)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 501 | } else { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 502 | // 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] | 503 | // reading the next entry. |
| 504 | do { |
| 505 | c = getc(fp); |
| 506 | } while ((c != EOF) && (c != '\n')); |
| 507 | if (c == EOF) break; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 508 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 509 | } |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 510 | free(lib_name); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 511 | fclose(fp); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 515 | void OS::SignalCodeMovingGC() { |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 516 | // Support for ll_prof.py. |
| 517 | // |
| 518 | // The Linux profiler built into the kernel logs all mmap's with |
| 519 | // PROT_EXEC so that analysis tools can properly attribute ticks. We |
| 520 | // do a mmap with a name known by ll_prof.py and immediately munmap |
| 521 | // it. This injects a GC marker into the stream of events generated |
| 522 | // by the kernel and allows us to synchronize V8 code log and the |
| 523 | // kernel log. |
| 524 | int size = sysconf(_SC_PAGESIZE); |
mstarzinger@chromium.org | de88679 | 2012-09-11 13:22:37 +0000 | [diff] [blame^] | 525 | FILE* f = fopen(FLAG_gc_fake_mmap, "w+"); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 526 | void* addr = mmap(OS::GetRandomMmapAddr(), |
| 527 | size, |
| 528 | PROT_READ | PROT_EXEC, |
| 529 | MAP_PRIVATE, |
| 530 | fileno(f), |
| 531 | 0); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 532 | ASSERT(addr != MAP_FAILED); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 533 | OS::Free(addr, size); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 534 | fclose(f); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 538 | int OS::StackWalk(Vector<OS::StackFrame> frames) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 539 | // backtrace is a glibc extension. |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 540 | #if defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 541 | int frames_size = frames.length(); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 542 | ScopedVector<void*> addresses(frames_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 543 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 544 | int frames_count = backtrace(addresses.start(), frames_size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 545 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 546 | char** symbols = backtrace_symbols(addresses.start(), frames_count); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 547 | if (symbols == NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 548 | return kStackWalkError; |
| 549 | } |
| 550 | |
| 551 | for (int i = 0; i < frames_count; i++) { |
| 552 | frames[i].address = addresses[i]; |
| 553 | // Format a text representation of the frame based on the information |
| 554 | // available. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 555 | SNPrintF(MutableCStrVector(frames[i].text, kStackWalkMaxTextLen), |
| 556 | "%s", |
| 557 | symbols[i]); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 558 | // Make sure line termination is in place. |
| 559 | frames[i].text[kStackWalkMaxTextLen - 1] = '\0'; |
| 560 | } |
| 561 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 562 | free(symbols); |
| 563 | |
| 564 | return frames_count; |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 565 | #else // defined(__GLIBC__) && !defined(__UCLIBC__) |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 566 | return 0; |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 567 | #endif // defined(__GLIBC__) && !defined(__UCLIBC__) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | |
| 571 | // Constants used for mmap. |
| 572 | static const int kMmapFd = -1; |
| 573 | static const int kMmapFdOffset = 0; |
| 574 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 575 | VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 576 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 577 | VirtualMemory::VirtualMemory(size_t size) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 578 | address_ = ReserveRegion(size); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 579 | size_ = size; |
| 580 | } |
| 581 | |
| 582 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 583 | VirtualMemory::VirtualMemory(size_t size, size_t alignment) |
| 584 | : address_(NULL), size_(0) { |
| 585 | ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); |
| 586 | size_t request_size = RoundUp(size + alignment, |
| 587 | static_cast<intptr_t>(OS::AllocateAlignment())); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 588 | void* reservation = mmap(OS::GetRandomMmapAddr(), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 589 | request_size, |
| 590 | PROT_NONE, |
| 591 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, |
| 592 | kMmapFd, |
| 593 | kMmapFdOffset); |
| 594 | if (reservation == MAP_FAILED) return; |
| 595 | |
| 596 | Address base = static_cast<Address>(reservation); |
| 597 | Address aligned_base = RoundUp(base, alignment); |
| 598 | ASSERT_LE(base, aligned_base); |
| 599 | |
| 600 | // Unmap extra memory reserved before and after the desired block. |
| 601 | if (aligned_base != base) { |
| 602 | size_t prefix_size = static_cast<size_t>(aligned_base - base); |
| 603 | OS::Free(base, prefix_size); |
| 604 | request_size -= prefix_size; |
| 605 | } |
| 606 | |
| 607 | size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); |
| 608 | ASSERT_LE(aligned_size, request_size); |
| 609 | |
| 610 | if (aligned_size != request_size) { |
| 611 | size_t suffix_size = request_size - aligned_size; |
| 612 | OS::Free(aligned_base + aligned_size, suffix_size); |
| 613 | request_size -= suffix_size; |
| 614 | } |
| 615 | |
| 616 | ASSERT(aligned_size == request_size); |
| 617 | |
| 618 | address_ = static_cast<void*>(aligned_base); |
| 619 | size_ = aligned_size; |
| 620 | } |
| 621 | |
| 622 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 623 | VirtualMemory::~VirtualMemory() { |
| 624 | if (IsReserved()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 625 | bool result = ReleaseRegion(address(), size()); |
| 626 | ASSERT(result); |
| 627 | USE(result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 628 | } |
| 629 | } |
| 630 | |
| 631 | |
| 632 | bool VirtualMemory::IsReserved() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 633 | return address_ != NULL; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | void VirtualMemory::Reset() { |
| 638 | address_ = NULL; |
| 639 | size_ = 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 643 | 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] | 644 | return CommitRegion(address, size, is_executable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | |
| 648 | bool VirtualMemory::Uncommit(void* address, size_t size) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 649 | return UncommitRegion(address, size); |
| 650 | } |
| 651 | |
| 652 | |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 653 | bool VirtualMemory::Guard(void* address) { |
| 654 | OS::Guard(address, OS::CommitPageSize()); |
| 655 | return true; |
| 656 | } |
| 657 | |
| 658 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 659 | void* VirtualMemory::ReserveRegion(size_t size) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 660 | void* result = mmap(OS::GetRandomMmapAddr(), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 661 | size, |
| 662 | PROT_NONE, |
| 663 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, |
| 664 | kMmapFd, |
| 665 | kMmapFdOffset); |
| 666 | |
| 667 | if (result == MAP_FAILED) return NULL; |
| 668 | |
| 669 | return result; |
| 670 | } |
| 671 | |
| 672 | |
| 673 | bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) { |
| 674 | int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0); |
| 675 | if (MAP_FAILED == mmap(base, |
| 676 | size, |
| 677 | prot, |
| 678 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, |
| 679 | kMmapFd, |
| 680 | kMmapFdOffset)) { |
| 681 | return false; |
| 682 | } |
| 683 | |
| 684 | UpdateAllocatedSpaceLimits(base, size); |
| 685 | return true; |
| 686 | } |
| 687 | |
| 688 | |
| 689 | bool VirtualMemory::UncommitRegion(void* base, size_t size) { |
| 690 | return mmap(base, |
| 691 | size, |
| 692 | PROT_NONE, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 693 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 694 | kMmapFd, |
| 695 | kMmapFdOffset) != MAP_FAILED; |
| 696 | } |
| 697 | |
| 698 | |
| 699 | bool VirtualMemory::ReleaseRegion(void* base, size_t size) { |
| 700 | return munmap(base, size) == 0; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 704 | class Thread::PlatformData : public Malloced { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 705 | public: |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 706 | PlatformData() : thread_(kNoThread) {} |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 707 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 708 | pthread_t thread_; // Thread handle for pthread. |
| 709 | }; |
| 710 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 711 | Thread::Thread(const Options& options) |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 712 | : data_(new PlatformData()), |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 713 | stack_size_(options.stack_size()) { |
| 714 | set_name(options.name()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | |
| 718 | Thread::~Thread() { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 719 | delete data_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | |
| 723 | static void* ThreadEntry(void* arg) { |
| 724 | Thread* thread = reinterpret_cast<Thread*>(arg); |
| 725 | // This is also initialized by the first argument to pthread_create() but we |
| 726 | // don't know which thread will run first (the original thread or the new |
| 727 | // one) so we initialize it here too. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 728 | #ifdef PR_SET_NAME |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 729 | prctl(PR_SET_NAME, |
| 730 | reinterpret_cast<unsigned long>(thread->name()), // NOLINT |
| 731 | 0, 0, 0); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 732 | #endif |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 733 | thread->data()->thread_ = pthread_self(); |
| 734 | ASSERT(thread->data()->thread_ != kNoThread); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 735 | thread->Run(); |
| 736 | return NULL; |
| 737 | } |
| 738 | |
| 739 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 740 | void Thread::set_name(const char* name) { |
| 741 | strncpy(name_, name, sizeof(name_)); |
| 742 | name_[sizeof(name_) - 1] = '\0'; |
| 743 | } |
| 744 | |
| 745 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 746 | void Thread::Start() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 747 | pthread_attr_t* attr_ptr = NULL; |
| 748 | pthread_attr_t attr; |
| 749 | if (stack_size_ > 0) { |
| 750 | pthread_attr_init(&attr); |
| 751 | pthread_attr_setstacksize(&attr, static_cast<size_t>(stack_size_)); |
| 752 | attr_ptr = &attr; |
| 753 | } |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 754 | int result = pthread_create(&data_->thread_, attr_ptr, ThreadEntry, this); |
| 755 | CHECK_EQ(0, result); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 756 | ASSERT(data_->thread_ != kNoThread); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 757 | } |
| 758 | |
| 759 | |
| 760 | void Thread::Join() { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 761 | pthread_join(data_->thread_, NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | |
| 765 | Thread::LocalStorageKey Thread::CreateThreadLocalKey() { |
| 766 | pthread_key_t key; |
| 767 | int result = pthread_key_create(&key, NULL); |
| 768 | USE(result); |
| 769 | ASSERT(result == 0); |
| 770 | return static_cast<LocalStorageKey>(key); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | void Thread::DeleteThreadLocalKey(LocalStorageKey key) { |
| 775 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 776 | int result = pthread_key_delete(pthread_key); |
| 777 | USE(result); |
| 778 | ASSERT(result == 0); |
| 779 | } |
| 780 | |
| 781 | |
| 782 | void* Thread::GetThreadLocal(LocalStorageKey key) { |
| 783 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 784 | return pthread_getspecific(pthread_key); |
| 785 | } |
| 786 | |
| 787 | |
| 788 | void Thread::SetThreadLocal(LocalStorageKey key, void* value) { |
| 789 | pthread_key_t pthread_key = static_cast<pthread_key_t>(key); |
| 790 | pthread_setspecific(pthread_key, value); |
| 791 | } |
| 792 | |
| 793 | |
| 794 | void Thread::YieldCPU() { |
| 795 | sched_yield(); |
| 796 | } |
| 797 | |
| 798 | |
| 799 | class LinuxMutex : public Mutex { |
| 800 | public: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 801 | LinuxMutex() { |
| 802 | pthread_mutexattr_t attrs; |
| 803 | int result = pthread_mutexattr_init(&attrs); |
| 804 | ASSERT(result == 0); |
| 805 | result = pthread_mutexattr_settype(&attrs, PTHREAD_MUTEX_RECURSIVE); |
| 806 | ASSERT(result == 0); |
| 807 | result = pthread_mutex_init(&mutex_, &attrs); |
| 808 | ASSERT(result == 0); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 809 | USE(result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | virtual ~LinuxMutex() { pthread_mutex_destroy(&mutex_); } |
| 813 | |
| 814 | virtual int Lock() { |
| 815 | int result = pthread_mutex_lock(&mutex_); |
| 816 | return result; |
| 817 | } |
| 818 | |
| 819 | virtual int Unlock() { |
| 820 | int result = pthread_mutex_unlock(&mutex_); |
| 821 | return result; |
| 822 | } |
| 823 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 824 | virtual bool TryLock() { |
| 825 | int result = pthread_mutex_trylock(&mutex_); |
| 826 | // Return false if the lock is busy and locking failed. |
| 827 | if (result == EBUSY) { |
| 828 | return false; |
| 829 | } |
| 830 | ASSERT(result == 0); // Verify no other errors. |
| 831 | return true; |
| 832 | } |
| 833 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 834 | private: |
| 835 | pthread_mutex_t mutex_; // Pthread mutex for POSIX platforms. |
| 836 | }; |
| 837 | |
| 838 | |
| 839 | Mutex* OS::CreateMutex() { |
| 840 | return new LinuxMutex(); |
| 841 | } |
| 842 | |
| 843 | |
| 844 | class LinuxSemaphore : public Semaphore { |
| 845 | public: |
| 846 | explicit LinuxSemaphore(int count) { sem_init(&sem_, 0, count); } |
| 847 | virtual ~LinuxSemaphore() { sem_destroy(&sem_); } |
| 848 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 849 | virtual void Wait(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 850 | virtual bool Wait(int timeout); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 851 | virtual void Signal() { sem_post(&sem_); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 852 | private: |
| 853 | sem_t sem_; |
| 854 | }; |
| 855 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 856 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 857 | void LinuxSemaphore::Wait() { |
| 858 | while (true) { |
| 859 | int result = sem_wait(&sem_); |
| 860 | if (result == 0) return; // Successfully got semaphore. |
| 861 | CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup. |
| 862 | } |
| 863 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 864 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 865 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 866 | #ifndef TIMEVAL_TO_TIMESPEC |
| 867 | #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \ |
| 868 | (ts)->tv_sec = (tv)->tv_sec; \ |
| 869 | (ts)->tv_nsec = (tv)->tv_usec * 1000; \ |
| 870 | } while (false) |
| 871 | #endif |
| 872 | |
| 873 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 874 | bool LinuxSemaphore::Wait(int timeout) { |
| 875 | const long kOneSecondMicros = 1000000; // NOLINT |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 876 | |
| 877 | // Split timeout into second and nanosecond parts. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 878 | struct timeval delta; |
| 879 | delta.tv_usec = timeout % kOneSecondMicros; |
| 880 | delta.tv_sec = timeout / kOneSecondMicros; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 881 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 882 | struct timeval current_time; |
| 883 | // Get the current time. |
| 884 | if (gettimeofday(¤t_time, NULL) == -1) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 885 | return false; |
| 886 | } |
| 887 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 888 | // Calculate time for end of timeout. |
| 889 | struct timeval end_time; |
| 890 | timeradd(¤t_time, &delta, &end_time); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 891 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 892 | struct timespec ts; |
| 893 | TIMEVAL_TO_TIMESPEC(&end_time, &ts); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 894 | // Wait for semaphore signalled or timeout. |
| 895 | while (true) { |
| 896 | int result = sem_timedwait(&sem_, &ts); |
| 897 | if (result == 0) return true; // Successfully got semaphore. |
| 898 | if (result > 0) { |
| 899 | // For glibc prior to 2.3.4 sem_timedwait returns the error instead of -1. |
| 900 | errno = result; |
| 901 | result = -1; |
| 902 | } |
| 903 | if (result == -1 && errno == ETIMEDOUT) return false; // Timeout. |
| 904 | CHECK(result == -1 && errno == EINTR); // Signal caused spurious wakeup. |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 909 | Semaphore* OS::CreateSemaphore(int count) { |
| 910 | return new LinuxSemaphore(count); |
| 911 | } |
| 912 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 913 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 914 | #if defined(__ANDROID__) && !defined(__BIONIC_HAVE_UCONTEXT_T) |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 915 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 916 | // Not all versions of Android's C library provide ucontext_t. |
| 917 | // Detect this and provide custom but compatible definitions. Note that these |
| 918 | // follow the GLibc naming convention to access register values from |
| 919 | // mcontext_t. |
| 920 | // |
| 921 | // See http://code.google.com/p/android/issues/detail?id=34784 |
| 922 | |
| 923 | #if defined(__arm__) |
| 924 | |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 925 | typedef struct sigcontext mcontext_t; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 926 | |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 927 | typedef struct ucontext { |
| 928 | uint32_t uc_flags; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 929 | struct ucontext* uc_link; |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 930 | stack_t uc_stack; |
| 931 | mcontext_t uc_mcontext; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 932 | // Other fields are not used by V8, don't define them here. |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 933 | } ucontext_t; |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 934 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 935 | #elif defined(__mips__) |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 936 | // MIPS version of sigcontext, for Android bionic. |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 937 | typedef struct { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 938 | uint32_t regmask; |
| 939 | uint32_t status; |
| 940 | uint64_t pc; |
| 941 | uint64_t gregs[32]; |
| 942 | uint64_t fpregs[32]; |
| 943 | uint32_t acx; |
| 944 | uint32_t fpc_csr; |
| 945 | uint32_t fpc_eir; |
| 946 | uint32_t used_math; |
| 947 | uint32_t dsp; |
| 948 | uint64_t mdhi; |
| 949 | uint64_t mdlo; |
| 950 | uint32_t hi1; |
| 951 | uint32_t lo1; |
| 952 | uint32_t hi2; |
| 953 | uint32_t lo2; |
| 954 | uint32_t hi3; |
| 955 | uint32_t lo3; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 956 | } mcontext_t; |
| 957 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 958 | typedef struct ucontext { |
| 959 | uint32_t uc_flags; |
| 960 | struct ucontext* uc_link; |
| 961 | stack_t uc_stack; |
| 962 | mcontext_t uc_mcontext; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 963 | // Other fields are not used by V8, don't define them here. |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 964 | } ucontext_t; |
| 965 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 966 | #elif defined(__i386__) |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 967 | // x86 version for Android. |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 968 | typedef struct { |
yangguo@chromium.org | cb9affa | 2012-05-15 12:16:38 +0000 | [diff] [blame] | 969 | uint32_t gregs[19]; |
| 970 | void* fpregs; |
| 971 | uint32_t oldmask; |
| 972 | uint32_t cr2; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 973 | } mcontext_t; |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 974 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 975 | typedef uint32_t kernel_sigset_t[2]; // x86 kernel uses 64-bit signal masks |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 976 | typedef struct ucontext { |
yangguo@chromium.org | cb9affa | 2012-05-15 12:16:38 +0000 | [diff] [blame] | 977 | uint32_t uc_flags; |
| 978 | struct ucontext* uc_link; |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 979 | stack_t uc_stack; |
| 980 | mcontext_t uc_mcontext; |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 981 | // Other fields are not used by V8, don't define them here. |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 982 | } ucontext_t; |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 983 | enum { REG_EBP = 6, REG_ESP = 7, REG_EIP = 14 }; |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 984 | #endif |
| 985 | |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 986 | #endif // __ANDROID__ && !defined(__BIONIC_HAVE_UCONTEXT_T) |
kasperl@chromium.org | acae378 | 2009-04-11 09:17:08 +0000 | [diff] [blame] | 987 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 988 | static int GetThreadID() { |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 989 | #if defined(__ANDROID__) |
| 990 | // Android's C library provides gettid(2). |
| 991 | return gettid(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 992 | #else |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 993 | // Glibc doesn't provide a wrapper for gettid(2). |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 994 | return syscall(SYS_gettid); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 995 | #endif |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 999 | static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) { |
| 1000 | USE(info); |
| 1001 | if (signal != SIGPROF) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1002 | Isolate* isolate = Isolate::UncheckedCurrent(); |
| 1003 | if (isolate == NULL || !isolate->IsInitialized() || !isolate->IsInUse()) { |
| 1004 | // We require a fully initialized and entered isolate. |
| 1005 | return; |
| 1006 | } |
vitalyr@chromium.org | 0ec56d6 | 2011-04-15 22:22:08 +0000 | [diff] [blame] | 1007 | if (v8::Locker::IsActive() && |
| 1008 | !isolate->thread_manager()->IsLockedByCurrentThread()) { |
| 1009 | return; |
| 1010 | } |
| 1011 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1012 | Sampler* sampler = isolate->logger()->sampler(); |
| 1013 | if (sampler == NULL || !sampler->IsActive()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1014 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1015 | TickSample sample_obj; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1016 | TickSample* sample = CpuProfiler::TickSampleEvent(isolate); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1017 | if (sample == NULL) sample = &sample_obj; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1018 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1019 | // Extracting the sample from the context is extremely machine dependent. |
| 1020 | ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context); |
| 1021 | mcontext_t& mcontext = ucontext->uc_mcontext; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1022 | sample->state = isolate->current_vm_state(); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1023 | #if V8_HOST_ARCH_IA32 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1024 | sample->pc = reinterpret_cast<Address>(mcontext.gregs[REG_EIP]); |
| 1025 | sample->sp = reinterpret_cast<Address>(mcontext.gregs[REG_ESP]); |
| 1026 | sample->fp = reinterpret_cast<Address>(mcontext.gregs[REG_EBP]); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1027 | #elif V8_HOST_ARCH_X64 |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1028 | sample->pc = reinterpret_cast<Address>(mcontext.gregs[REG_RIP]); |
| 1029 | sample->sp = reinterpret_cast<Address>(mcontext.gregs[REG_RSP]); |
| 1030 | sample->fp = reinterpret_cast<Address>(mcontext.gregs[REG_RBP]); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 1031 | #elif V8_HOST_ARCH_ARM |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 1032 | #if defined(__GLIBC__) && !defined(__UCLIBC__) && \ |
| 1033 | (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
| 1034 | // Old GLibc ARM versions used a gregs[] array to access the register |
| 1035 | // values from mcontext_t. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1036 | sample->pc = reinterpret_cast<Address>(mcontext.gregs[R15]); |
| 1037 | sample->sp = reinterpret_cast<Address>(mcontext.gregs[R13]); |
| 1038 | sample->fp = reinterpret_cast<Address>(mcontext.gregs[R11]); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1039 | #else |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1040 | sample->pc = reinterpret_cast<Address>(mcontext.arm_pc); |
| 1041 | sample->sp = reinterpret_cast<Address>(mcontext.arm_sp); |
| 1042 | sample->fp = reinterpret_cast<Address>(mcontext.arm_fp); |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 1043 | #endif // defined(__GLIBC__) && !defined(__UCLIBC__) && |
| 1044 | // (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1045 | #elif V8_HOST_ARCH_MIPS |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1046 | sample->pc = reinterpret_cast<Address>(mcontext.pc); |
| 1047 | sample->sp = reinterpret_cast<Address>(mcontext.gregs[29]); |
| 1048 | sample->fp = reinterpret_cast<Address>(mcontext.gregs[30]); |
| 1049 | #endif // V8_HOST_ARCH_* |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1050 | sampler->SampleStack(sample); |
| 1051 | sampler->Tick(sample); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1052 | } |
| 1053 | |
| 1054 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1055 | class Sampler::PlatformData : public Malloced { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1056 | public: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1057 | PlatformData() : vm_tid_(GetThreadID()) {} |
| 1058 | |
| 1059 | int vm_tid() const { return vm_tid_; } |
| 1060 | |
| 1061 | private: |
| 1062 | const int vm_tid_; |
| 1063 | }; |
| 1064 | |
| 1065 | |
| 1066 | class SignalSender : public Thread { |
| 1067 | public: |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1068 | enum SleepInterval { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1069 | HALF_INTERVAL, |
| 1070 | FULL_INTERVAL |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1071 | }; |
| 1072 | |
jkummerow@chromium.org | ab7dad4 | 2012-02-07 12:07:34 +0000 | [diff] [blame] | 1073 | static const int kSignalSenderStackSize = 64 * KB; |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1074 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1075 | explicit SignalSender(int interval) |
yangguo@chromium.org | 659ceec | 2012-01-26 07:37:54 +0000 | [diff] [blame] | 1076 | : Thread(Thread::Options("SignalSender", kSignalSenderStackSize)), |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1077 | vm_tgid_(getpid()), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1078 | interval_(interval) {} |
| 1079 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1080 | static void SetUp() { if (!mutex_) mutex_ = OS::CreateMutex(); } |
| 1081 | static void TearDown() { delete mutex_; } |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1082 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1083 | static void InstallSignalHandler() { |
| 1084 | struct sigaction sa; |
| 1085 | sa.sa_sigaction = ProfilerSignalHandler; |
| 1086 | sigemptyset(&sa.sa_mask); |
| 1087 | sa.sa_flags = SA_RESTART | SA_SIGINFO; |
| 1088 | signal_handler_installed_ = |
| 1089 | (sigaction(SIGPROF, &sa, &old_signal_handler_) == 0); |
| 1090 | } |
| 1091 | |
| 1092 | static void RestoreSignalHandler() { |
| 1093 | if (signal_handler_installed_) { |
| 1094 | sigaction(SIGPROF, &old_signal_handler_, 0); |
| 1095 | signal_handler_installed_ = false; |
| 1096 | } |
| 1097 | } |
| 1098 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1099 | static void AddActiveSampler(Sampler* sampler) { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1100 | ScopedLock lock(mutex_); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1101 | SamplerRegistry::AddActiveSampler(sampler); |
| 1102 | if (instance_ == NULL) { |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1103 | // Start a thread that will send SIGPROF signal to VM threads, |
| 1104 | // when CPU profiling will be enabled. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1105 | instance_ = new SignalSender(sampler->interval()); |
| 1106 | instance_->Start(); |
| 1107 | } else { |
| 1108 | ASSERT(instance_->interval_ == sampler->interval()); |
| 1109 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1110 | } |
| 1111 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1112 | static void RemoveActiveSampler(Sampler* sampler) { |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1113 | ScopedLock lock(mutex_); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1114 | SamplerRegistry::RemoveActiveSampler(sampler); |
| 1115 | if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { |
jkummerow@chromium.org | ddda9e8 | 2011-07-06 11:27:02 +0000 | [diff] [blame] | 1116 | RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1117 | delete instance_; |
| 1118 | instance_ = NULL; |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1119 | RestoreSignalHandler(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | // Implement Thread::Run(). |
| 1124 | virtual void Run() { |
| 1125 | SamplerRegistry::State state; |
| 1126 | while ((state = SamplerRegistry::GetState()) != |
| 1127 | SamplerRegistry::HAS_NO_SAMPLERS) { |
| 1128 | bool cpu_profiling_enabled = |
| 1129 | (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS); |
| 1130 | bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled(); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1131 | if (cpu_profiling_enabled && !signal_handler_installed_) { |
| 1132 | InstallSignalHandler(); |
| 1133 | } else if (!cpu_profiling_enabled && signal_handler_installed_) { |
| 1134 | RestoreSignalHandler(); |
| 1135 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1136 | // When CPU profiling is enabled both JavaScript and C++ code is |
| 1137 | // profiled. We must not suspend. |
| 1138 | if (!cpu_profiling_enabled) { |
| 1139 | if (rate_limiter_.SuspendIfNecessary()) continue; |
| 1140 | } |
| 1141 | if (cpu_profiling_enabled && runtime_profiler_enabled) { |
| 1142 | if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) { |
| 1143 | return; |
| 1144 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1145 | Sleep(HALF_INTERVAL); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1146 | if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) { |
| 1147 | return; |
| 1148 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1149 | Sleep(HALF_INTERVAL); |
| 1150 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1151 | if (cpu_profiling_enabled) { |
| 1152 | if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, |
| 1153 | this)) { |
| 1154 | return; |
| 1155 | } |
| 1156 | } |
| 1157 | if (runtime_profiler_enabled) { |
| 1158 | if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, |
| 1159 | NULL)) { |
| 1160 | return; |
| 1161 | } |
| 1162 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1163 | Sleep(FULL_INTERVAL); |
whesse@chromium.org | f0ac72d | 2010-11-08 12:47:26 +0000 | [diff] [blame] | 1164 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1165 | } |
| 1166 | } |
| 1167 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1168 | static void DoCpuProfile(Sampler* sampler, void* raw_sender) { |
| 1169 | if (!sampler->IsProfiling()) return; |
| 1170 | SignalSender* sender = reinterpret_cast<SignalSender*>(raw_sender); |
| 1171 | sender->SendProfilingSignal(sampler->platform_data()->vm_tid()); |
| 1172 | } |
| 1173 | |
| 1174 | static void DoRuntimeProfile(Sampler* sampler, void* ignored) { |
| 1175 | if (!sampler->isolate()->IsInitialized()) return; |
| 1176 | sampler->isolate()->runtime_profiler()->NotifyTick(); |
| 1177 | } |
| 1178 | |
| 1179 | void SendProfilingSignal(int tid) { |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1180 | if (!signal_handler_installed_) return; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1181 | // Glibc doesn't provide a wrapper for tgkill(2). |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1182 | #if defined(ANDROID) |
| 1183 | syscall(__NR_tgkill, vm_tgid_, tid, SIGPROF); |
| 1184 | #else |
| 1185 | syscall(SYS_tgkill, vm_tgid_, tid, SIGPROF); |
| 1186 | #endif |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | void Sleep(SleepInterval full_or_half) { |
| 1190 | // Convert ms to us and subtract 100 us to compensate delays |
| 1191 | // occuring during signal delivery. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1192 | useconds_t interval = interval_ * 1000 - 100; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1193 | if (full_or_half == HALF_INTERVAL) interval /= 2; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1194 | #if defined(ANDROID) |
| 1195 | usleep(interval); |
| 1196 | #else |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1197 | int result = usleep(interval); |
| 1198 | #ifdef DEBUG |
| 1199 | if (result != 0 && errno != EINTR) { |
| 1200 | fprintf(stderr, |
| 1201 | "SignalSender usleep error; interval = %u, errno = %d\n", |
| 1202 | interval, |
| 1203 | errno); |
| 1204 | ASSERT(result == 0 || errno == EINTR); |
| 1205 | } |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1206 | #endif // DEBUG |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1207 | USE(result); |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 1208 | #endif // ANDROID |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1209 | } |
| 1210 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1211 | const int vm_tgid_; |
| 1212 | const int interval_; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1213 | RuntimeProfilerRateLimiter rate_limiter_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1214 | |
| 1215 | // Protects the process wide state below. |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1216 | static Mutex* mutex_; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1217 | static SignalSender* instance_; |
| 1218 | static bool signal_handler_installed_; |
| 1219 | static struct sigaction old_signal_handler_; |
| 1220 | |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 1221 | private: |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1222 | DISALLOW_COPY_AND_ASSIGN(SignalSender); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1223 | }; |
| 1224 | |
| 1225 | |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1226 | Mutex* SignalSender::mutex_ = NULL; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1227 | SignalSender* SignalSender::instance_ = NULL; |
| 1228 | struct sigaction SignalSender::old_signal_handler_; |
| 1229 | bool SignalSender::signal_handler_installed_ = false; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1230 | |
| 1231 | |
fschneider@chromium.org | 7d10be5 | 2012-04-10 12:30:14 +0000 | [diff] [blame] | 1232 | void OS::SetUp() { |
| 1233 | // Seed the random number generator. We preserve microsecond resolution. |
| 1234 | uint64_t seed = Ticks() ^ (getpid() << 16); |
| 1235 | srandom(static_cast<unsigned int>(seed)); |
| 1236 | limit_mutex = CreateMutex(); |
| 1237 | |
| 1238 | #ifdef __arm__ |
| 1239 | // When running on ARM hardware check that the EABI used by V8 and |
| 1240 | // by the C code is the same. |
| 1241 | bool hard_float = OS::ArmUsingHardFloat(); |
| 1242 | if (hard_float) { |
| 1243 | #if !USE_EABI_HARDFLOAT |
| 1244 | PrintF("ERROR: Binary compiled with -mfloat-abi=hard but without " |
| 1245 | "-DUSE_EABI_HARDFLOAT\n"); |
| 1246 | exit(1); |
| 1247 | #endif |
| 1248 | } else { |
| 1249 | #if USE_EABI_HARDFLOAT |
| 1250 | PrintF("ERROR: Binary not compiled with -mfloat-abi=hard but with " |
| 1251 | "-DUSE_EABI_HARDFLOAT\n"); |
| 1252 | exit(1); |
| 1253 | #endif |
| 1254 | } |
| 1255 | #endif |
| 1256 | SignalSender::SetUp(); |
| 1257 | } |
| 1258 | |
| 1259 | |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1260 | void OS::TearDown() { |
| 1261 | SignalSender::TearDown(); |
| 1262 | delete limit_mutex; |
| 1263 | } |
| 1264 | |
| 1265 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1266 | Sampler::Sampler(Isolate* isolate, int interval) |
| 1267 | : isolate_(isolate), |
| 1268 | interval_(interval), |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1269 | profiling_(false), |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 1270 | active_(false), |
| 1271 | samples_taken_(0) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1272 | data_ = new PlatformData; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1276 | Sampler::~Sampler() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1277 | ASSERT(!IsActive()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1278 | delete data_; |
| 1279 | } |
| 1280 | |
| 1281 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1282 | void Sampler::Start() { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1283 | ASSERT(!IsActive()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1284 | SetActive(true); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1285 | SignalSender::AddActiveSampler(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1289 | void Sampler::Stop() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1290 | ASSERT(IsActive()); |
| 1291 | SignalSender::RemoveActiveSampler(this); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1292 | SetActive(false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1293 | } |
| 1294 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1295 | |
| 1296 | } } // namespace v8::internal |