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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Platform-specific code for QNX goes here. For the POSIX-compatible | 5 // Platform-specific code for QNX goes here. For the POSIX-compatible |
6 // parts the implementation is in platform-posix.cc. | 6 // parts the implementation is in platform-posix.cc. |
7 | 7 |
8 #include <backtrace.h> | 8 #include <backtrace.h> |
9 #include <pthread.h> | 9 #include <pthread.h> |
10 #include <semaphore.h> | 10 #include <semaphore.h> |
11 #include <signal.h> | 11 #include <signal.h> |
12 #include <stdlib.h> | 12 #include <stdlib.h> |
13 #include <sys/resource.h> | 13 #include <sys/resource.h> |
14 #include <sys/time.h> | 14 #include <sys/time.h> |
15 #include <sys/types.h> | 15 #include <sys/types.h> |
16 #include <ucontext.h> | 16 #include <ucontext.h> |
17 | 17 |
18 // QNX requires memory pages to be marked as executable. | 18 // QNX requires memory pages to be marked as executable. |
19 // Otherwise, the OS raises an exception when executing code in that page. | 19 // Otherwise, the OS raises an exception when executing code in that page. |
20 #include <errno.h> | 20 #include <errno.h> |
21 #include <fcntl.h> // open | 21 #include <fcntl.h> // open |
22 #include <stdarg.h> | 22 #include <stdarg.h> |
23 #include <strings.h> // index | 23 #include <strings.h> // index |
24 #include <sys/mman.h> // mmap & munmap | 24 #include <sys/mman.h> // mmap & munmap |
25 #include <sys/procfs.h> | 25 #include <sys/procfs.h> |
26 #include <sys/stat.h> // open | 26 #include <sys/stat.h> // open |
27 #include <sys/types.h> // mmap & munmap | 27 #include <sys/types.h> // mmap & munmap |
28 #include <unistd.h> // sysconf | 28 #include <unistd.h> // sysconf |
29 | 29 |
| 30 #include <cmath> |
| 31 |
30 #undef MAP_TYPE | 32 #undef MAP_TYPE |
31 | 33 |
32 #include "src/v8.h" | |
33 | |
34 #include "src/platform.h" | 34 #include "src/platform.h" |
| 35 #include "src/utils.h" |
35 | 36 |
36 | 37 |
37 namespace v8 { | 38 namespace v8 { |
38 namespace internal { | 39 namespace internal { |
39 | 40 |
40 // 0 is never a valid thread id on Qnx since tids and pids share a | 41 // 0 is never a valid thread id on Qnx since tids and pids share a |
41 // name space and pid 0 is reserved (see man 2 kill). | 42 // name space and pid 0 is reserved (see man 2 kill). |
42 static const pthread_t kNoThread = (pthread_t) 0; | 43 static const pthread_t kNoThread = (pthread_t) 0; |
43 | 44 |
44 | 45 |
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252 size_t request_size = RoundUp(size + alignment, | 253 size_t request_size = RoundUp(size + alignment, |
253 static_cast<intptr_t>(OS::AllocateAlignment())); | 254 static_cast<intptr_t>(OS::AllocateAlignment())); |
254 void* reservation = mmap(OS::GetRandomMmapAddr(), | 255 void* reservation = mmap(OS::GetRandomMmapAddr(), |
255 request_size, | 256 request_size, |
256 PROT_NONE, | 257 PROT_NONE, |
257 MAP_PRIVATE | MAP_ANONYMOUS | MAP_LAZY, | 258 MAP_PRIVATE | MAP_ANONYMOUS | MAP_LAZY, |
258 kMmapFd, | 259 kMmapFd, |
259 kMmapFdOffset); | 260 kMmapFdOffset); |
260 if (reservation == MAP_FAILED) return; | 261 if (reservation == MAP_FAILED) return; |
261 | 262 |
262 Address base = static_cast<Address>(reservation); | 263 uint8_t* base = static_cast<uint8_t*>(reservation); |
263 Address aligned_base = RoundUp(base, alignment); | 264 uint8_t* aligned_base = RoundUp(base, alignment); |
264 ASSERT_LE(base, aligned_base); | 265 ASSERT_LE(base, aligned_base); |
265 | 266 |
266 // Unmap extra memory reserved before and after the desired block. | 267 // Unmap extra memory reserved before and after the desired block. |
267 if (aligned_base != base) { | 268 if (aligned_base != base) { |
268 size_t prefix_size = static_cast<size_t>(aligned_base - base); | 269 size_t prefix_size = static_cast<size_t>(aligned_base - base); |
269 OS::Free(base, prefix_size); | 270 OS::Free(base, prefix_size); |
270 request_size -= prefix_size; | 271 request_size -= prefix_size; |
271 } | 272 } |
272 | 273 |
273 size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); | 274 size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); |
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364 bool VirtualMemory::ReleaseRegion(void* base, size_t size) { | 365 bool VirtualMemory::ReleaseRegion(void* base, size_t size) { |
365 return munmap(base, size) == 0; | 366 return munmap(base, size) == 0; |
366 } | 367 } |
367 | 368 |
368 | 369 |
369 bool VirtualMemory::HasLazyCommits() { | 370 bool VirtualMemory::HasLazyCommits() { |
370 return false; | 371 return false; |
371 } | 372 } |
372 | 373 |
373 } } // namespace v8::internal | 374 } } // namespace v8::internal |
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