Crashpad

Public Types | Public Member Functions | List of all members
crashpad::ModuleSnapshot Class Referenceabstract

An abstract interface to a snapshot representing a code module (binary image) loaded into a snapshot process. More...

`#include "snapshot/module_snapshot.h"`

Inheritance diagram for crashpad::ModuleSnapshot:

## Public Types
enum | ModuleType
| A module’s type. More...

## Public Member Functions
virtual std::string | Name () const =0
| Returns the module’s pathname.
virtual uint64_t | Address () const =0
| Returns the base address that the module is loaded at in the snapshot process.
virtual uint64_t | Size () const =0
| Returns the size that the module occupies in the snapshot process’ address space, starting at its base address. More...
virtual time_t | Timestamp () const =0
| Returns the module’s timestamp, if known. More...
virtual void | FileVersion (uint16_t *version_0, uint16_t *version_1, uint16_t *version_2, uint16_t *version_3) const =0
| Returns the module’s file version in the version_* parameters. More...
virtual void | SourceVersion (uint16_t *version_0, uint16_t *version_1, uint16_t *version_2, uint16_t *version_3) const =0
| Returns the module’s source version in the version_* parameters. More...
virtual ModuleType | GetModuleType () const =0
| Returns the module’s type.
virtual void | UUIDAndAge (crashpad::UUID *uuid, uint32_t *age) const =0
| Returns the module’s UUID in the uuid parameter, and the age of that UUID in age. More...
virtual std::string | DebugFileName () const =0
| Returns the module’s debug file info name. More...
virtual std::vector< std::string > | AnnotationsVector () const =0
| Returns string annotations recorded in the module. More...
virtual std::map< std::string, std::string > | AnnotationsSimpleMap () const =0
| Returns key-value string annotations recorded in the module. More...
virtual std::set< CheckedRange< uint64_t > > | ExtraMemoryRanges () const =0
| Returns a set of extra memory ranges specified in the module as being desirable to include in the crash dump.
virtual std::vector< const UserMinidumpStream * > | CustomMinidumpStreams () const =0
| Returns a list of custom minidump stream specified in the module to be included in the crash dump. More...

## Detailed Description

An abstract interface to a snapshot representing a code module (binary image) loaded into a snapshot process.

## Member Enumeration Documentation

## ◆ ModuleType

enum crashpad::ModuleSnapshot::ModuleType

A module’s type.

Enumerator
kModuleTypeUnknown | The module’s type is unknown.
kModuleTypeExecutable | The module is a main executable.
kModuleTypeSharedLibrary | The module is a shared library. See also kModuleTypeLoadableModule
kModuleTypeLoadableModule | The module is a loadable module. On some platforms, loadable modules are distinguished from shared libraries. On these platforms, a shared library is a module that another module links against directly, and a loadable module is not. Loadable modules tend to be binary plug-ins.
kModuleTypeDynamicLoader | The module is a dynamic loader. This is the module responsible for loading other modules. This is normally `dyld` for macOS and `ld.so` for Linux and other systems using ELF.

## Member Function Documentation

## ◆ AnnotationsSimpleMap()

virtual std::map<std::string, std::string> crashpad::ModuleSnapshot::AnnotationsSimpleMap | ( |  | ) | const
| pure virtual

Returns key-value string annotations recorded in the module.

This method retrieves annotations recorded in a module. These annotations are intended for diagnostic use, including crash analysis. “Simple annotations” are structured as a sequence of key-value pairs, where all keys and values are strings. These are referred to in Chrome as “crash keys.”

For macOS snapshots, these annotations are found by interpreting the `__DATA,crashpad_info` section as `CrashpadInfo`. Clients can use the Crashpad client interface to store annotations in this structure. Most annotations under the client’s direct control will be retrievable by this method. For clients such as Chrome, this includes the process type.

The annotations returned by this method do not duplicate those returned by AnnotationsVector(). Additional annotations related to the process, system, or snapshot producer may be obtained by calling ProcessSnapshot::AnnotationsSimpleMap().

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ AnnotationsVector()

virtual std::vector<std::string> crashpad::ModuleSnapshot::AnnotationsVector | ( |  | ) | const
| pure virtual

Returns string annotations recorded in the module.

This method retrieves annotations recorded in a module. These annotations are intended for diagnostic use, including crash analysis. A module may contain multiple annotations, so they are returned in a vector.

For macOS snapshots, these annotations are found by interpreting the module’s `__DATA,__crash_info` section as `crashreporter_annotations_t`. System libraries using the crash reporter client interface may reference annotations in this structure. Additional annotations messages may be found in other locations, which may be module-specific. The dynamic linker (`dyld`) can provide an annotation at its `_error_string` symbol.

The annotations returned by this method do not duplicate those returned by AnnotationsSimpleMap().

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ CustomMinidumpStreams()

virtual std::vector<const UserMinidumpStream*> crashpad::ModuleSnapshot::CustomMinidumpStreams | ( |  | ) | const
| pure virtual

Returns a list of custom minidump stream specified in the module to be included in the crash dump.

Returns
  The caller does not take ownership of the returned objects, they are scoped to the lifetime of the ModuleSnapshot object that they were obtained from.

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ DebugFileName()

virtual std::string crashpad::ModuleSnapshot::DebugFileName | ( |  | ) | const
| pure virtual

Returns the module’s debug file info name.

On Windows, this references the PDB file, which contains symbol information held separately from the module itself. On other platforms, this is normally the basename of the module, because the debug info file’s name is not relevant even in split-debug scenarios.

See also
  UUIDAndAge()

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ FileVersion()

virtual void crashpad::ModuleSnapshot::FileVersion | ( | uint16_t * | version_0,
|  | uint16_t * | version_1,
|  | uint16_t * | version_2,
|  | uint16_t * | version_3
| ) |  | const
| pure virtual

Returns the module’s file version in the version_* parameters.

If no file version can be determined, the version_* parameters are set to `0`.

For macOS snapshots, this is taken from the module’s `LC_ID_DYLIB` load command for shared libraries, and is `0` for other module types.

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ Size()

virtual uint64_t crashpad::ModuleSnapshot::Size | ( |  | ) | const
| pure virtual

Returns the size that the module occupies in the snapshot process’ address space, starting at its base address.

For macOS snapshots, this method only reports the size of the `__TEXT` segment, because segments may not be loaded contiguously.

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ SourceVersion()

virtual void crashpad::ModuleSnapshot::SourceVersion | ( | uint16_t * | version_0,
|  | uint16_t * | version_1,
|  | uint16_t * | version_2,
|  | uint16_t * | version_3
| ) |  | const
| pure virtual

Returns the module’s source version in the version_* parameters.

If no source version can be determined, the version_* parameters are set to `0`.

For macOS snapshots, this is taken from the module’s `LC_SOURCE_VERSION` load command.

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ Timestamp()

virtual time_t crashpad::ModuleSnapshot::Timestamp | ( |  | ) | const
| pure virtual

Returns the module’s timestamp, if known.

The timestamp is typically the modification time of the file that provided the module in `time_t` format, seconds since the POSIX epoch. If the module’s timestamp is unknown, this method returns `0`.

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

## ◆ UUIDAndAge()

virtual void crashpad::ModuleSnapshot::UUIDAndAge | ( | crashpad::UUID * | uuid,
|  | uint32_t * | age
| ) |  | const
| pure virtual

Returns the module’s UUID in the uuid parameter, and the age of that UUID in age.

A snapshot module’s UUID is taken directly from the module itself. If the module does not have a UUID, the uuid parameter will be zeroed out.

age is the number of times the UUID has been reused. This occurs on Windows with incremental linking. On other platforms age will always be `0`.

See also
  DebugFileName()

Implemented in crashpad::test::TestModuleSnapshot, crashpad::internal::ModuleSnapshotWin, crashpad::internal::ModuleSnapshotMac, and crashpad::internal::ModuleSnapshotMinidump.

The documentation for this class was generated from the following file:

- snapshot/module_snapshot.h