ART: Unlink target oat file before compiling
Dex2oat must create a new file (new inode) when writing to a target
given by name, as the existing file may be in use. So unlink any
existing file first.
Bug: 22047255
(cherry picked from commit 52f0aeb8e9f16fa5c3067f6a36be701354448924)
Change-Id: Ief942c71564076e39c1e8340d5c4c55286f75896
diff --git a/dex2oat/dex2oat.cc b/dex2oat/dex2oat.cc
index 7a23746..74d5c0c 100644
--- a/dex2oat/dex2oat.cc
+++ b/dex2oat/dex2oat.cc
@@ -1038,6 +1038,10 @@
bool OpenFile() {
bool create_file = !oat_unstripped_.empty(); // as opposed to using open file descriptor
if (create_file) {
+ // We're supposed to create this file. If the file already exists, it may be in use currently.
+ // We must not change the content of that file, then. So unlink it first.
+ unlink(oat_unstripped_.c_str());
+
oat_file_.reset(OS::CreateEmptyFile(oat_unstripped_.c_str()));
if (oat_location_.empty()) {
oat_location_ = oat_filename_;
