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authorEvgeniy Stepanov <eugeni.stepanov@gmail.com>2014-09-04 10:36:14 +0000
committerEvgeniy Stepanov <eugeni.stepanov@gmail.com>2014-09-04 10:36:14 +0000
commita8f5a36445cb4e264c4d650c2e40e638b1270e9a (patch)
treeafbb90907969aace870eca9bf19f58962cbda4c1 /lib/msan/msan_chained_origin_depot.cc
parent3482b7ad38e8fcd0262d109c6e8c130696837972 (diff)
[msan] Make origin tracking fork-safe.
Chained origins make plain memory stores async-signal-unsafe. We already disable it inside signal handlers. This change grabs all origin-related locks before fork() and releases them after fork() to avoid a deadlock in the child process. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@217140 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/msan/msan_chained_origin_depot.cc')
-rw-r--r--lib/msan/msan_chained_origin_depot.cc8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/msan/msan_chained_origin_depot.cc b/lib/msan/msan_chained_origin_depot.cc
index 8e5decd76..8bc139809 100644
--- a/lib/msan/msan_chained_origin_depot.cc
+++ b/lib/msan/msan_chained_origin_depot.cc
@@ -116,4 +116,12 @@ u32 ChainedOriginDepotGet(u32 id, u32 *other) {
return desc.here_id;
}
+void ChainedOriginDepotLockAll() {
+ chainedOriginDepot.LockAll();
+}
+
+void ChainedOriginDepotUnlockAll() {
+ chainedOriginDepot.UnlockAll();
+}
+
} // namespace __msan