Greg Clayton | 06d7cc8 | 2011-04-04 18:18:57 +0000 | [diff] [blame] | 1 | //===-- ConnectionSharedMemory.cpp ----------------------------*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "lldb/Core/ConnectionSharedMemory.h" |
| 11 | |
| 12 | // C Includes |
| 13 | #include <errno.h> |
| 14 | #include <pthread.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <sys/file.h> |
| 17 | #include <sys/mman.h> |
| 18 | #include <sys/stat.h> |
| 19 | #include <sys/types.h> |
| 20 | |
| 21 | // C++ Includes |
| 22 | // Other libraries and framework includes |
| 23 | // Project includes |
| 24 | #include "lldb/lldb-private-log.h" |
| 25 | #include "lldb/Core/Communication.h" |
| 26 | #include "lldb/Core/Log.h" |
| 27 | |
| 28 | using namespace lldb; |
| 29 | using namespace lldb_private; |
| 30 | |
| 31 | ConnectionSharedMemory::ConnectionSharedMemory () : |
| 32 | Connection(), |
| 33 | m_name(), |
| 34 | m_fd (-1), |
| 35 | m_mmap() |
| 36 | { |
| 37 | } |
| 38 | |
| 39 | ConnectionSharedMemory::~ConnectionSharedMemory () |
| 40 | { |
| 41 | Disconnect (NULL); |
| 42 | } |
| 43 | |
| 44 | bool |
| 45 | ConnectionSharedMemory::IsConnected () const |
| 46 | { |
| 47 | return m_fd >= 0; |
| 48 | } |
| 49 | |
| 50 | ConnectionStatus |
| 51 | ConnectionSharedMemory::Connect (const char *s, Error *error_ptr) |
| 52 | { |
| 53 | // if (s && s[0]) |
| 54 | // { |
| 55 | // if (strstr(s, "shm-create://")) |
| 56 | // { |
| 57 | // } |
| 58 | // else if (strstr(s, "shm-connect://")) |
| 59 | // { |
| 60 | // } |
| 61 | // if (error_ptr) |
| 62 | // error_ptr->SetErrorStringWithFormat ("unsupported connection URL: '%s'", s); |
| 63 | // return eConnectionStatusError; |
| 64 | // } |
| 65 | if (error_ptr) |
| 66 | error_ptr->SetErrorString("invalid connect arguments"); |
| 67 | return eConnectionStatusError; |
| 68 | } |
| 69 | |
| 70 | ConnectionStatus |
| 71 | ConnectionSharedMemory::Disconnect (Error *error_ptr) |
| 72 | { |
| 73 | m_mmap.Clear(); |
| 74 | if (!m_name.empty()) |
| 75 | { |
| 76 | shm_unlink (m_name.c_str()); |
| 77 | m_name.clear(); |
| 78 | } |
| 79 | return eConnectionStatusSuccess; |
| 80 | } |
| 81 | |
| 82 | size_t |
Greg Clayton | 63afdb0 | 2011-06-17 01:22:15 +0000 | [diff] [blame] | 83 | ConnectionSharedMemory::Read (void *dst, |
| 84 | size_t dst_len, |
| 85 | uint32_t timeout_usec, |
| 86 | ConnectionStatus &status, |
| 87 | Error *error_ptr) |
Greg Clayton | 06d7cc8 | 2011-04-04 18:18:57 +0000 | [diff] [blame] | 88 | { |
| 89 | status = eConnectionStatusSuccess; |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | size_t |
| 94 | ConnectionSharedMemory::Write (const void *src, size_t src_len, ConnectionStatus &status, Error *error_ptr) |
| 95 | { |
| 96 | status = eConnectionStatusSuccess; |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | ConnectionStatus |
| 101 | ConnectionSharedMemory::BytesAvailable (uint32_t timeout_usec, Error *error_ptr) |
| 102 | { |
| 103 | return eConnectionStatusLostConnection; |
| 104 | } |
| 105 | |
| 106 | ConnectionStatus |
| 107 | ConnectionSharedMemory::Open (bool create, const char *name, size_t size, Error *error_ptr) |
| 108 | { |
| 109 | if (m_fd != -1) |
| 110 | { |
| 111 | if (error_ptr) |
| 112 | error_ptr->SetErrorString("already open"); |
| 113 | return eConnectionStatusError; |
| 114 | } |
| 115 | |
| 116 | m_name.assign (name); |
| 117 | int oflag = O_RDWR; |
| 118 | if (create) |
| 119 | oflag |= O_CREAT; |
| 120 | m_fd = ::shm_open (m_name.c_str(), oflag, S_IRUSR|S_IWUSR); |
| 121 | |
| 122 | if (create) |
| 123 | ::ftruncate (m_fd, size); |
| 124 | |
| 125 | if (m_mmap.MemoryMapFromFileDescriptor(m_fd, 0, size, true, false) == size) |
| 126 | return eConnectionStatusSuccess; |
| 127 | |
| 128 | Disconnect(NULL); |
| 129 | return eConnectionStatusError; |
| 130 | } |
| 131 | |