Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "src/profiling/memory/wire_protocol.h" |
| 18 | |
| 19 | #include "perfetto/base/logging.h" |
Florian Mayer | f3c0ac8 | 2018-10-02 11:53:55 +0100 | [diff] [blame] | 20 | #include "perfetto/base/unix_socket.h" |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 21 | #include "perfetto/base/utils.h" |
| 22 | |
| 23 | #include <sys/socket.h> |
| 24 | #include <sys/types.h> |
| 25 | |
| 26 | namespace perfetto { |
Florian Mayer | 8c0d048 | 2018-10-22 14:23:40 +0100 | [diff] [blame] | 27 | namespace profiling { |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 28 | |
| 29 | namespace { |
| 30 | template <typename T> |
| 31 | bool ViewAndAdvance(char** ptr, T** out, const char* end) { |
| 32 | if (end - sizeof(T) < *ptr) |
| 33 | return false; |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 34 | *out = reinterpret_cast<T*>(*ptr); |
| 35 | *ptr += sizeof(T); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 36 | return true; |
| 37 | } |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 38 | |
| 39 | // We need this to prevent crashes due to FORTIFY_SOURCE. |
| 40 | void UnsafeMemcpy(char* dest, const char* src, size_t n) |
| 41 | __attribute__((no_sanitize("address"))) { |
| 42 | for (size_t i = 0; i < n; ++i) { |
| 43 | dest[i] = src[i]; |
| 44 | } |
| 45 | } |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 46 | } // namespace |
| 47 | |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 48 | bool SendWireMessage(SharedRingBuffer* shmem, const WireMessage& msg) { |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 49 | uint64_t total_size; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 50 | struct iovec iovecs[3] = {}; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 51 | // TODO(fmayer): Maye pack these two. |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 52 | iovecs[0].iov_base = const_cast<RecordType*>(&msg.record_type); |
| 53 | iovecs[0].iov_len = sizeof(msg.record_type); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 54 | if (msg.alloc_header) { |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 55 | PERFETTO_DCHECK(msg.record_type == RecordType::Malloc); |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 56 | iovecs[1].iov_base = msg.alloc_header; |
| 57 | iovecs[1].iov_len = sizeof(*msg.alloc_header); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 58 | } else if (msg.free_header) { |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 59 | PERFETTO_DCHECK(msg.record_type == RecordType::Free); |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 60 | iovecs[1].iov_base = msg.free_header; |
| 61 | iovecs[1].iov_len = sizeof(*msg.free_header); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 62 | } else { |
Florian Mayer | 6db99a9 | 2018-10-18 11:34:55 +0100 | [diff] [blame] | 63 | PERFETTO_DFATAL("Neither alloc_header nor free_header set."); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 64 | return false; |
| 65 | } |
| 66 | |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 67 | iovecs[2].iov_base = msg.payload; |
| 68 | iovecs[2].iov_len = msg.payload_size; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 69 | |
| 70 | struct msghdr hdr = {}; |
| 71 | hdr.msg_iov = iovecs; |
| 72 | if (msg.payload) { |
| 73 | hdr.msg_iovlen = base::ArraySize(iovecs); |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 74 | total_size = iovecs[0].iov_len + iovecs[1].iov_len + iovecs[2].iov_len; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 75 | } else { |
| 76 | // If we are not sending payload, just ignore that iovec. |
| 77 | hdr.msg_iovlen = base::ArraySize(iovecs) - 1; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 78 | total_size = iovecs[0].iov_len + iovecs[1].iov_len; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 79 | } |
| 80 | |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 81 | SharedRingBuffer::Buffer buf; |
| 82 | { |
| 83 | ScopedSpinlock lock = shmem->AcquireLock(ScopedSpinlock::Mode::Try); |
| 84 | if (!lock.locked()) { |
| 85 | PERFETTO_DLOG("Failed to acquire spinlock."); |
| 86 | return false; |
| 87 | } |
| 88 | buf = shmem->BeginWrite(lock, total_size); |
| 89 | } |
| 90 | if (!buf) { |
| 91 | PERFETTO_DFATAL("Buffer overflow."); |
| 92 | shmem->EndWrite(std::move(buf)); |
| 93 | return false; |
| 94 | } |
| 95 | |
| 96 | size_t offset = 0; |
| 97 | for (size_t i = 0; i < hdr.msg_iovlen; ++i) { |
| 98 | UnsafeMemcpy(reinterpret_cast<char*>(buf.data + offset), |
| 99 | reinterpret_cast<const char*>(hdr.msg_iov[i].iov_base), |
| 100 | hdr.msg_iov[i].iov_len); |
| 101 | offset += hdr.msg_iov[i].iov_len; |
| 102 | } |
| 103 | shmem->EndWrite(std::move(buf)); |
| 104 | return true; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | bool ReceiveWireMessage(char* buf, size_t size, WireMessage* out) { |
| 108 | RecordType* record_type; |
| 109 | char* end = buf + size; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 110 | if (!ViewAndAdvance<RecordType>(&buf, &record_type, end)) { |
| 111 | PERFETTO_DFATAL("Cannot read record type."); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 112 | return false; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 113 | } |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 114 | |
| 115 | out->payload = nullptr; |
| 116 | out->payload_size = 0; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 117 | out->record_type = *record_type; |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 118 | |
| 119 | if (*record_type == RecordType::Malloc) { |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 120 | if (!ViewAndAdvance<AllocMetadata>(&buf, &out->alloc_header, end)) { |
| 121 | PERFETTO_DFATAL("Cannot read alloc header."); |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 122 | return false; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 123 | } |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 124 | out->payload = buf; |
| 125 | if (buf > end) { |
Florian Mayer | 6db99a9 | 2018-10-18 11:34:55 +0100 | [diff] [blame] | 126 | PERFETTO_DFATAL("Buffer overflowed"); |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 127 | return false; |
| 128 | } |
| 129 | out->payload_size = static_cast<size_t>(end - buf); |
| 130 | } else if (*record_type == RecordType::Free) { |
Ryan Savitski | 549753e | 2019-03-15 15:52:37 +0000 | [diff] [blame^] | 131 | if (!ViewAndAdvance<FreeBatch>(&buf, &out->free_header, end)) { |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 132 | PERFETTO_DFATAL("Cannot read free header."); |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 133 | return false; |
Florian Mayer | 5195059 | 2019-03-06 20:05:15 +0000 | [diff] [blame] | 134 | } |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 135 | } else { |
Florian Mayer | 6db99a9 | 2018-10-18 11:34:55 +0100 | [diff] [blame] | 136 | PERFETTO_DFATAL("Invalid record type."); |
Florian Mayer | 7ad1275 | 2018-10-02 16:48:44 +0100 | [diff] [blame] | 137 | return false; |
| 138 | } |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 139 | return true; |
| 140 | } |
| 141 | |
Florian Mayer | 8c0d048 | 2018-10-22 14:23:40 +0100 | [diff] [blame] | 142 | } // namespace profiling |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 143 | } // namespace perfetto |