0899da3697
This patch contains contributions from the following members of the BlackBerry Web Technologies team: Eli Fidler <efidler@blackberry.com> Konrad Piascik <kpiascik@blackberry.com> Jeff Rogers <jrogers@blackberry.com> Cosmin Truta <ctruta@blackberry.com> Peter Wang <peter.wang@torchmobile.com.cn> Xiaobo Wang <xiaobwang@blackberry.com> Ming Xie <mxie@blackberry.com> Leo Yang <leoyang@blackberry.com> R=bmeurer@chromium.org, jkummerow@chromium.org Review URL: https://codereview.chromium.org/61153009 Patch from Cosmin Truta <ctruta@blackberry.com>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18430 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
402 lines
11 KiB
C++
402 lines
11 KiB
C++
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Platform-specific code for QNX goes here. For the POSIX-compatible
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// parts the implementation is in platform-posix.cc.
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#include <pthread.h>
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#include <semaphore.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <ucontext.h>
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#include <backtrace.h>
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// QNX requires memory pages to be marked as executable.
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// Otherwise, the OS raises an exception when executing code in that page.
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#include <sys/types.h> // mmap & munmap
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#include <sys/mman.h> // mmap & munmap
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#include <sys/stat.h> // open
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#include <fcntl.h> // open
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#include <unistd.h> // sysconf
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#include <strings.h> // index
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#include <errno.h>
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#include <stdarg.h>
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#include <sys/procfs.h>
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#undef MAP_TYPE
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#include "v8.h"
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#include "platform.h"
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#include "v8threads.h"
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#include "vm-state-inl.h"
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namespace v8 {
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namespace internal {
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// 0 is never a valid thread id on Qnx since tids and pids share a
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// name space and pid 0 is reserved (see man 2 kill).
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static const pthread_t kNoThread = (pthread_t) 0;
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#ifdef __arm__
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bool OS::ArmUsingHardFloat() {
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// GCC versions 4.6 and above define __ARM_PCS or __ARM_PCS_VFP to specify
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// the Floating Point ABI used (PCS stands for Procedure Call Standard).
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// We use these as well as a couple of other defines to statically determine
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// what FP ABI used.
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// GCC versions 4.4 and below don't support hard-fp.
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// GCC versions 4.5 may support hard-fp without defining __ARM_PCS or
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// __ARM_PCS_VFP.
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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#if GCC_VERSION >= 40600
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#if defined(__ARM_PCS_VFP)
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return true;
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#else
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return false;
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#endif
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#elif GCC_VERSION < 40500
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return false;
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#else
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#if defined(__ARM_PCS_VFP)
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return true;
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#elif defined(__ARM_PCS) || defined(__SOFTFP__) || defined(__SOFTFP) || \
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!defined(__VFP_FP__)
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return false;
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#else
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#error "Your version of GCC does not report the FP ABI compiled for." \
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"Please report it on this issue" \
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"http://code.google.com/p/v8/issues/detail?id=2140"
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#endif
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#endif
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#undef GCC_VERSION
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}
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#endif // __arm__
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const char* OS::LocalTimezone(double time) {
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if (std::isnan(time)) return "";
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time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
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struct tm* t = localtime(&tv);
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if (NULL == t) return "";
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return t->tm_zone;
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}
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double OS::LocalTimeOffset() {
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time_t tv = time(NULL);
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struct tm* t = localtime(&tv);
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// tm_gmtoff includes any daylight savings offset, so subtract it.
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return static_cast<double>(t->tm_gmtoff * msPerSecond -
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(t->tm_isdst > 0 ? 3600 * msPerSecond : 0));
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}
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void* OS::Allocate(const size_t requested,
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size_t* allocated,
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bool is_executable) {
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const size_t msize = RoundUp(requested, AllocateAlignment());
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int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
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void* addr = OS::GetRandomMmapAddr();
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void* mbase = mmap(addr, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (mbase == MAP_FAILED) {
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LOG(i::Isolate::Current(),
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StringEvent("OS::Allocate", "mmap failed"));
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return NULL;
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}
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*allocated = msize;
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return mbase;
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}
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class PosixMemoryMappedFile : public OS::MemoryMappedFile {
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public:
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PosixMemoryMappedFile(FILE* file, void* memory, int size)
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: file_(file), memory_(memory), size_(size) { }
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virtual ~PosixMemoryMappedFile();
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virtual void* memory() { return memory_; }
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virtual int size() { return size_; }
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private:
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FILE* file_;
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void* memory_;
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int size_;
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};
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OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
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FILE* file = fopen(name, "r+");
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if (file == NULL) return NULL;
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fseek(file, 0, SEEK_END);
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int size = ftell(file);
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void* memory =
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mmap(OS::GetRandomMmapAddr(),
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size,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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fileno(file),
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0);
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return new PosixMemoryMappedFile(file, memory, size);
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}
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OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size,
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void* initial) {
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FILE* file = fopen(name, "w+");
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if (file == NULL) return NULL;
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int result = fwrite(initial, size, 1, file);
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if (result < 1) {
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fclose(file);
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return NULL;
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}
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void* memory =
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mmap(OS::GetRandomMmapAddr(),
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size,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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fileno(file),
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0);
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return new PosixMemoryMappedFile(file, memory, size);
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}
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PosixMemoryMappedFile::~PosixMemoryMappedFile() {
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if (memory_) OS::Free(memory_, size_);
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fclose(file_);
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}
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void OS::LogSharedLibraryAddresses(Isolate* isolate) {
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procfs_mapinfo *mapinfos = NULL, *mapinfo;
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int proc_fd, num, i;
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struct {
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procfs_debuginfo info;
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char buff[PATH_MAX];
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} map;
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char buf[PATH_MAX + 1];
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snprintf(buf, PATH_MAX + 1, "/proc/%d/as", getpid());
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if ((proc_fd = open(buf, O_RDONLY)) == -1) {
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close(proc_fd);
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return;
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}
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/* Get the number of map entries. */
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if (devctl(proc_fd, DCMD_PROC_MAPINFO, NULL, 0, &num) != EOK) {
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close(proc_fd);
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return;
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}
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mapinfos = reinterpret_cast<procfs_mapinfo *>(
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malloc(num * sizeof(procfs_mapinfo)));
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if (mapinfos == NULL) {
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close(proc_fd);
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return;
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}
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/* Fill the map entries. */
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if (devctl(proc_fd, DCMD_PROC_PAGEDATA,
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mapinfos, num * sizeof(procfs_mapinfo), &num) != EOK) {
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free(mapinfos);
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close(proc_fd);
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return;
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}
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for (i = 0; i < num; i++) {
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mapinfo = mapinfos + i;
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if (mapinfo->flags & MAP_ELF) {
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map.info.vaddr = mapinfo->vaddr;
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if (devctl(proc_fd, DCMD_PROC_MAPDEBUG, &map, sizeof(map), 0) != EOK) {
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continue;
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}
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LOG(isolate, SharedLibraryEvent(map.info.path,
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mapinfo->vaddr,
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mapinfo->vaddr + mapinfo->size));
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}
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}
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free(mapinfos);
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close(proc_fd);
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}
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void OS::SignalCodeMovingGC() {
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}
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// Constants used for mmap.
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static const int kMmapFd = -1;
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static const int kMmapFdOffset = 0;
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VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { }
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VirtualMemory::VirtualMemory(size_t size)
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: address_(ReserveRegion(size)), size_(size) { }
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VirtualMemory::VirtualMemory(size_t size, size_t alignment)
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: address_(NULL), size_(0) {
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ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment())));
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size_t request_size = RoundUp(size + alignment,
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static_cast<intptr_t>(OS::AllocateAlignment()));
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void* reservation = mmap(OS::GetRandomMmapAddr(),
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request_size,
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PROT_NONE,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_LAZY,
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kMmapFd,
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kMmapFdOffset);
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if (reservation == MAP_FAILED) return;
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Address base = static_cast<Address>(reservation);
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Address aligned_base = RoundUp(base, alignment);
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ASSERT_LE(base, aligned_base);
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// Unmap extra memory reserved before and after the desired block.
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if (aligned_base != base) {
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size_t prefix_size = static_cast<size_t>(aligned_base - base);
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OS::Free(base, prefix_size);
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request_size -= prefix_size;
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}
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size_t aligned_size = RoundUp(size, OS::AllocateAlignment());
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ASSERT_LE(aligned_size, request_size);
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if (aligned_size != request_size) {
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size_t suffix_size = request_size - aligned_size;
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OS::Free(aligned_base + aligned_size, suffix_size);
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request_size -= suffix_size;
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}
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ASSERT(aligned_size == request_size);
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address_ = static_cast<void*>(aligned_base);
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size_ = aligned_size;
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}
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VirtualMemory::~VirtualMemory() {
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if (IsReserved()) {
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bool result = ReleaseRegion(address(), size());
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ASSERT(result);
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USE(result);
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}
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}
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bool VirtualMemory::IsReserved() {
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return address_ != NULL;
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}
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void VirtualMemory::Reset() {
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address_ = NULL;
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size_ = 0;
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}
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bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) {
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return CommitRegion(address, size, is_executable);
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}
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bool VirtualMemory::Uncommit(void* address, size_t size) {
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return UncommitRegion(address, size);
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}
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bool VirtualMemory::Guard(void* address) {
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OS::Guard(address, OS::CommitPageSize());
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return true;
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}
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void* VirtualMemory::ReserveRegion(size_t size) {
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void* result = mmap(OS::GetRandomMmapAddr(),
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size,
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PROT_NONE,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_LAZY,
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kMmapFd,
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kMmapFdOffset);
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if (result == MAP_FAILED) return NULL;
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return result;
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}
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bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) {
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int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
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if (MAP_FAILED == mmap(base,
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size,
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prot,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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kMmapFd,
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kMmapFdOffset)) {
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return false;
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}
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return true;
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}
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bool VirtualMemory::UncommitRegion(void* base, size_t size) {
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return mmap(base,
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size,
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PROT_NONE,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED | MAP_LAZY,
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kMmapFd,
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kMmapFdOffset) != MAP_FAILED;
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}
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bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
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return munmap(base, size) == 0;
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}
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bool VirtualMemory::HasLazyCommits() {
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return false;
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}
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} } // namespace v8::internal
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