[Win] Properly parse all valid Win32 file urls.

We now make sure we properly parse all file:// urls properly for the
windows platform.

Includes a unit test to validate parsing.

This is a manual cherry-pick of aosp/1483306.

Change-Id: I80d16ee1ed77db3c6024635f16ddc6ae12106020

1 files changed, 5 insertions, 0 deletions

diff --git a/base/SharedMemory_posix.cpp b/base/SharedMemory_posix.cpp
index 5198a6df..7bb91c8e 100644
--- a/base/SharedMemory_posix.cpp
+++ b/base/SharedMemory_posix.cpp
@@ -91,6 +91,11 @@ int SharedMemory::openInternal(int oflag, int mode, bool doMapping) {
         mFd = shm_open(mName.c_str(), oflag, mode);
     } else {
         mFd = ::open(mName.c_str(), oflag, mode);
+        // Make sure the file can hold at least mSize bytes..
+        struct stat stat;
+        if (!fstat(mFd, &stat) && stat.st_size < mSize) {
+            ftruncate(mFd, mSize);
+        }
     }
     if (mFd == -1) {
         err = -errno;