gfx/layers/ipc/FenceUtilsGonk.cpp@97036ab72558 (annotated)
gfx/layers/ipc/FenceUtilsGonk.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim: sw=2 ts=8 et : |
| michael@0 | 3 | */ |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "GLContext.h" |
| michael@0 | 9 | #include "mozilla/unused.h" |
| michael@0 | 10 | #include "nsXULAppAPI.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #include "FenceUtilsGonk.h" |
| michael@0 | 13 | |
| michael@0 | 14 | using namespace android; |
| michael@0 | 15 | using namespace base; |
| michael@0 | 16 | using namespace mozilla::layers; |
| michael@0 | 17 | |
| michael@0 | 18 | namespace IPC { |
| michael@0 | 19 | |
| michael@0 | 20 | void |
| michael@0 | 21 | ParamTraits<FenceHandle>::Write(Message* aMsg, |
| michael@0 | 22 | const paramType& aParam) |
| michael@0 | 23 | { |
| michael@0 | 24 | #if ANDROID_VERSION >= 19 |
| michael@0 | 25 | sp<Fence> flattenable = aParam.mFence; |
| michael@0 | 26 | #else |
| michael@0 | 27 | Flattenable *flattenable = aParam.mFence.get(); |
| michael@0 | 28 | #endif |
| michael@0 | 29 | size_t nbytes = flattenable->getFlattenedSize(); |
| michael@0 | 30 | size_t nfds = flattenable->getFdCount(); |
| michael@0 | 31 | |
| michael@0 | 32 | char data[nbytes]; |
| michael@0 | 33 | int fds[nfds]; |
| michael@0 | 34 | |
| michael@0 | 35 | #if ANDROID_VERSION >= 19 |
| michael@0 | 36 | // Make a copy of "data" and "fds" for flatten() to avoid casting problem |
| michael@0 | 37 | void *pdata = (void *)data; |
| michael@0 | 38 | int *pfds = fds; |
| michael@0 | 39 | |
| michael@0 | 40 | flattenable->flatten(pdata, nbytes, pfds, nfds); |
| michael@0 | 41 | |
| michael@0 | 42 | // In Kitkat, flatten() will change the value of nbytes and nfds, which dues |
| michael@0 | 43 | // to multiple parcelable object consumption. The actual size and fd count |
| michael@0 | 44 | // which returned by getFlattenedSize() and getFdCount() are not changed. |
| michael@0 | 45 | // So we change nbytes and nfds back by call corresponding calls. |
| michael@0 | 46 | nbytes = flattenable->getFlattenedSize(); |
| michael@0 | 47 | nfds = flattenable->getFdCount(); |
| michael@0 | 48 | #else |
| michael@0 | 49 | flattenable->flatten(data, nbytes, fds, nfds); |
| michael@0 | 50 | #endif |
| michael@0 | 51 | aMsg->WriteSize(nbytes); |
| michael@0 | 52 | aMsg->WriteSize(nfds); |
| michael@0 | 53 | |
| michael@0 | 54 | aMsg->WriteBytes(data, nbytes); |
| michael@0 | 55 | for (size_t n = 0; n < nfds; ++n) { |
| michael@0 | 56 | // These buffers can't die in transit because they're created |
| michael@0 | 57 | // synchonously and the parent-side buffer can only be dropped if |
| michael@0 | 58 | // there's a crash. |
| michael@0 | 59 | aMsg->WriteFileDescriptor(FileDescriptor(fds[n], false)); |
| michael@0 | 60 | } |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | bool |
| michael@0 | 64 | ParamTraits<FenceHandle>::Read(const Message* aMsg, |
| michael@0 | 65 | void** aIter, paramType* aResult) |
| michael@0 | 66 | { |
| michael@0 | 67 | size_t nbytes; |
| michael@0 | 68 | size_t nfds; |
| michael@0 | 69 | const char* data; |
| michael@0 | 70 | |
| michael@0 | 71 | if (!aMsg->ReadSize(aIter, &nbytes) || |
| michael@0 | 72 | !aMsg->ReadSize(aIter, &nfds) || |
| michael@0 | 73 | !aMsg->ReadBytes(aIter, &data, nbytes)) { |
| michael@0 | 74 | return false; |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | int fds[nfds]; |
| michael@0 | 78 | |
| michael@0 | 79 | for (size_t n = 0; n < nfds; ++n) { |
| michael@0 | 80 | FileDescriptor fd; |
| michael@0 | 81 | if (!aMsg->ReadFileDescriptor(aIter, &fd)) { |
| michael@0 | 82 | return false; |
| michael@0 | 83 | } |
| michael@0 | 84 | // If the GraphicBuffer was shared cross-process, SCM_RIGHTS does |
| michael@0 | 85 | // the right thing and dup's the fd. If it's shared cross-thread, |
| michael@0 | 86 | // SCM_RIGHTS doesn't dup the fd. That's surprising, but we just |
| michael@0 | 87 | // deal with it here. NB: only the "default" (master) process can |
| michael@0 | 88 | // alloc gralloc buffers. |
| michael@0 | 89 | bool sameProcess = (XRE_GetProcessType() == GeckoProcessType_Default); |
| michael@0 | 90 | int dupFd = sameProcess ? dup(fd.fd) : fd.fd; |
| michael@0 | 91 | fds[n] = dupFd; |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | sp<Fence> buffer(new Fence()); |
| michael@0 | 95 | #if ANDROID_VERSION >= 19 |
| michael@0 | 96 | // Make a copy of "data" and "fds" for unflatten() to avoid casting problem |
| michael@0 | 97 | void const *pdata = (void const *)data; |
| michael@0 | 98 | int const *pfds = fds; |
| michael@0 | 99 | |
| michael@0 | 100 | if (NO_ERROR == buffer->unflatten(pdata, nbytes, pfds, nfds)) { |
| michael@0 | 101 | #else |
| michael@0 | 102 | Flattenable *flattenable = buffer.get(); |
| michael@0 | 103 | |
| michael@0 | 104 | if (NO_ERROR == flattenable->unflatten(data, nbytes, fds, nfds)) { |
| michael@0 | 105 | #endif |
| michael@0 | 106 | aResult->mFence = buffer; |
| michael@0 | 107 | return true; |
| michael@0 | 108 | } |
| michael@0 | 109 | return false; |
| michael@0 | 110 | } |
| michael@0 | 111 | |
| michael@0 | 112 | } // namespace IPC |
| michael@0 | 113 | |
| michael@0 | 114 | namespace mozilla { |
| michael@0 | 115 | namespace layers { |
| michael@0 | 116 | |
| michael@0 | 117 | FenceHandle::FenceHandle(const sp<Fence>& aFence) |
| michael@0 | 118 | : mFence(aFence) |
| michael@0 | 119 | { |
| michael@0 | 120 | } |
| michael@0 | 121 | |
| michael@0 | 122 | } // namespace layers |
| michael@0 | 123 | } // namespace mozilla |
