Allow passing info about known memory mappings to MinidumpWriter and ExceptionHandler

src/client/linux/minidump_writer/minidump_writer.h

Index: src/client/linux/minidump_writer/minidump_writer.h
===================================================================
--- a/src/client/linux/minidump_writer/minidump_writer.h
+++ b/src/client/linux/minidump_writer/minidump_writer.h
@@ -28,26 +28,40 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef CLIENT_LINUX_MINIDUMP_WRITER_MINIDUMP_WRITER_H_
 #define CLIENT_LINUX_MINIDUMP_WRITER_MINIDUMP_WRITER_H_
 
 #include <stdint.h>
 #include <unistd.h>
 
+#include <list>
+#include <utility>
+
+#include "google_breakpad/common/minidump_format.h"
+
 namespace google_breakpad {
 
+// A list of <MappingInfo, GUID>
+typedef std::pair<struct MappingInfo, u_int8_t[sizeof(MDGUID)]> MappingEntry;
+typedef std::list<MappingEntry> MappingList;
+
 // Write a minidump to the filesystem. This function does not malloc nor use
 // libc functions which may. Thus, it can be used in contexts where the state
 // of the heap may be corrupt.
 //   filename: the filename to write to. This is opened O_EXCL and fails if
 //     open fails.
 //   crashing_process: the pid of the crashing process. This must be trusted.
 //   blob: a blob of data from the crashing process. See exception_handler.h
 //   blob_size: the length of |blob|, in bytes
 //
 // Returns true iff successful.
 bool WriteMinidump(const char* filename, pid_t crashing_process,
                    const void* blob, size_t blob_size);
 
+// This overload also allows passing a list of known mappings.
+bool WriteMinidump(const char* filename, pid_t crashing_process,
+                   const void* blob, size_t blob_size,
+                   const MappingList& mappings);
+
 }  // namespace google_breakpad
 
 #endif  // CLIENT_LINUX_MINIDUMP_WRITER_MINIDUMP_WRITER_H_