Flutter Engine
Public Member Functions | Static Public Member Functions | List of all members
dart_utils::MappedResource Class Reference

#include <mapped_resource.h>

Public Member Functions

 MappedResource ()
 
 MappedResource (MappedResource &&other)
 
MappedResource & operator= (MappedResource &&other)
 
 ~MappedResource ()
 
const uint8_t * address () const
 
size_t size () const
 

Static Public Member Functions

static bool LoadFromNamespace (fdio_ns_t *namespc, const std::string &path, MappedResource &resource, bool executable=false)
 
static bool LoadFromDir (int dirfd, const std::string &path, MappedResource &resource, bool executable=false)
 
static bool LoadFromVmo (const std::string &path, fuchsia::mem::Buffer resource_vmo, MappedResource &resource, bool executable=false)
 

Detailed Description

Definition at line 50 of file mapped_resource.h.

Constructor & Destructor Documentation

◆ MappedResource() [1/2]

dart_utils::MappedResource::MappedResource ( )
inline

Definition at line 52 of file mapped_resource.h.

52 : address_(nullptr), size_(0) {}

◆ MappedResource() [2/2]

dart_utils::MappedResource::MappedResource ( MappedResource &&  other)
inline

Definition at line 53 of file mapped_resource.h.

54  : address_(other.address_), size_(other.size_) {
55  other.address_ = nullptr;
56  other.size_ = 0;
57  }

◆ ~MappedResource()

dart_utils::MappedResource::~MappedResource ( )

Definition at line 97 of file mapped_resource.cc.

97  {
98  if (address_ != nullptr) {
99  zx::vmar::root_self()->unmap(reinterpret_cast<uintptr_t>(address_), size_);
100  address_ = nullptr;
101  size_ = 0;
102  }
103 }

Member Function Documentation

◆ address()

const uint8_t* dart_utils::MappedResource::address ( ) const
inline

Definition at line 92 of file mapped_resource.h.

Referenced by dart_runner::CreateServiceIsolate(), dart_runner::DartRunner::DartRunner(), and dart_runner::GetVMServiceAssetsArchiveCallback().

92  {
93  return reinterpret_cast<const uint8_t*>(address_);
94  }

◆ LoadFromDir()

static bool dart_utils::MappedResource::LoadFromDir ( int  dirfd,
const std::string &  path,
MappedResource &  resource,
bool  executable = false 
)
static

◆ LoadFromNamespace()

bool dart_utils::MappedResource::LoadFromNamespace ( fdio_ns_t *  namespc,
const std::string &  path,
MappedResource &  resource,
bool  executable = false 
)
static

Definition at line 63 of file mapped_resource.cc.

References LoadFromVmo(), and dart_utils::OpenVmo().

Referenced by dart_runner::CreateServiceIsolate(), dart_runner::DartRunner::DartRunner(), and dart_runner::GetVMServiceAssetsArchiveCallback().

66  {
67  fuchsia::mem::Buffer resource_vmo;
68  return OpenVmo(&resource_vmo, namespc, path, executable) &&
69  LoadFromVmo(path, std::move(resource_vmo), resource, executable);
70 }
flutter::path
DEF_SWITCHES_START snapshot asset path
Definition: switches.h:32
dart_utils::OpenVmo
static bool OpenVmo(fuchsia::mem::Buffer *resource_vmo, fdio_ns_t *namespc, const std::string &path, bool executable)
Definition: mapped_resource.cc:29
dart_utils::MappedResource::LoadFromVmo
static bool LoadFromVmo(const std::string &path, fuchsia::mem::Buffer resource_vmo, MappedResource &resource, bool executable=false)
Definition: mapped_resource.cc:72

◆ LoadFromVmo()

bool dart_utils::MappedResource::LoadFromVmo ( const std::string &  path,
fuchsia::mem::Buffer  resource_vmo,
MappedResource &  resource,
bool  executable = false 
)
static

Definition at line 72 of file mapped_resource.cc.

References flutter::flags, and LOG_TAG.

Referenced by LoadFromNamespace().

75  {
76  if (resource_vmo.size == 0) {
77  return true;
78  }
79 
80  uint32_t flags = ZX_VM_PERM_READ;
81  if (executable) {
82  flags |= ZX_VM_PERM_EXECUTE;
83  }
84  uintptr_t addr;
85  zx_status_t status = zx::vmar::root_self()->map(flags, 0, resource_vmo.vmo, 0,
86  resource_vmo.size, &addr);
87  if (status != ZX_OK) {
88  FX_LOGF(ERROR, LOG_TAG, "Failed to map: %s", zx_status_get_string(status));
89  return false;
90  }
91 
92  resource.address_ = reinterpret_cast<void*>(addr);
93  resource.size_ = resource_vmo.size;
94  return true;
95 }
LOG_TAG
#define LOG_TAG
Definition: logging.h:11
flutter::flags
DEF_SWITCHES_START snapshot asset Path to the directory containing the four files specified by VmSnapshotInstructions and IsolateSnapshotInstructions vm snapshot The VM instructions snapshot that will be memory mapped as read and executable SnapshotAssetPath must be present isolate snapshot The isolate instructions snapshot that will be memory mapped as read and executable SnapshotAssetPath must be present icu symbol Prefix for the symbols representing ICU data linked into the Flutter library dart flags
Definition: switches.h:66

◆ operator=()

MappedResource& dart_utils::MappedResource::operator= ( MappedResource &&  other)
inline

Definition at line 58 of file mapped_resource.h.

58  {
59  address_ = other.address_;
60  size_ = other.size_;
61  other.address_ = nullptr;
62  other.size_ = 0;
63  return *this;
64  }

◆ size()

size_t dart_utils::MappedResource::size ( ) const
inline

Definition at line 95 of file mapped_resource.h.

Referenced by dart_runner::GetVMServiceAssetsArchiveCallback().

95 { return size_; }
The documentation for this class was generated from the following files: