Index: sandbox/linux/services/syscall_wrappers.h |
diff --git a/sandbox/linux/services/syscall_wrappers.h b/sandbox/linux/services/syscall_wrappers.h |
index 7f703e03b7bb6a2121d59ecdf4b5379d1086918c..2001f38f40b4f8d6dd1babc3e0bdca7cfc01f31e 100644 |
--- a/sandbox/linux/services/syscall_wrappers.h |
+++ b/sandbox/linux/services/syscall_wrappers.h |
@@ -33,6 +33,18 @@ |
pid_t* ctid, |
decltype(nullptr) regs); |
+// A wrapper for clone with fork-like behavior, meaning that it returns the |
+// child's pid in the parent and 0 in the child. |flags|, |ptid|, and |ctid| are |
+// as in the clone system call (the CLONE_VM flag is not supported). |
+// |
+// This function uses the libc clone wrapper (which updates libc's pid cache) |
+// internally, so callers may expect things like getpid() to work correctly |
+// after in both the child and parent. An exception is when this code is run |
+// under Valgrind. Valgrind does not support the libc clone wrapper, so the libc |
+// pid cache may be incorrect after this function is called under Valgrind. |
+SANDBOX_EXPORT pid_t |
+ForkWithFlags(unsigned long flags, pid_t* ptid, pid_t* ctid); |
+ |
SANDBOX_EXPORT void sys_exit_group(int status); |
// The official system call takes |args| as void* (in order to be extensible), |