Introduce Dart_SetVMFlags API function.

runtime/vm/flags.cc

Index: runtime/vm/flags.cc
diff --git a/runtime/vm/flags.cc b/runtime/vm/flags.cc
index 74cb5e7450bceb806688aee2d5355cf79ab67605..19cc3f8a2591c20db09c8dc4e66e838eccc0b9cf 100644
--- a/runtime/vm/flags.cc
+++ b/runtime/vm/flags.cc
@@ -16,6 +16,8 @@ DEFINE_FLAG(bool, ignore_unrecognized_flags, false,
 // List of registered flags.
 Flag* Flags::flags_ = NULL;
 
+bool Flags::initialized_ = false;
+
 class Flag {
  public:
   enum Type {
@@ -227,6 +229,13 @@ static bool IsValidFlag(const char* name,
 
 void Flags::ProcessCommandLineFlags(int number_of_vm_flags,

[siva, 2011/11/30 19:09:38]

void => bool

[podivilov, 2011/12/01 11:10:22]

Done.

                                     const char** vm_flags) {
+  if (initialized_) {
+    UNREACHABLE();
+    return;

[siva, 2011/11/30 19:09:38]

return false; 
and remove the UNREACHABLE();

[podivilov, 2011/12/01 11:10:22]

Done.

+  }
+
+  initialized_ = true;
+
   const char* kPrefix = "--";
   const intptr_t kPrefixLen = strlen(kPrefix);