diff options
| -rw-r--r-- | core/java/android/os/MemoryFile.java | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/core/java/android/os/MemoryFile.java b/core/java/android/os/MemoryFile.java index ee7a4c6..6cec55a 100644 --- a/core/java/android/os/MemoryFile.java +++ b/core/java/android/os/MemoryFile.java @@ -63,12 +63,17 @@ public class MemoryFile * Allocates a new ashmem region. The region is initially not purgable. * * @param name optional name for the file (can be null). - * @param length of the memory file in bytes. + * @param length of the memory file in bytes, must be non-negative. * @throws IOException if the memory file could not be created. */ public MemoryFile(String name, int length) throws IOException { mLength = length; - mFD = native_open(name, length); + if (length >= 0) { + mFD = native_open(name, length); + } else { + throw new IOException("Invalid length: " + length); + } + if (length > 0) { mAddress = native_mmap(mFD, length, PROT_READ | PROT_WRITE); } else { |