# HG changeset patch
# Parent aae86c76643fd282c5e42c5bf784ccee2dc877a8
Backport js_strdup().

diff --git a/js/src/jscntxt.cpp b/js/src/jscntxt.cpp
--- a/js/src/jscntxt.cpp
+++ b/js/src/jscntxt.cpp
@@ -709,6 +709,16 @@ js::PrintError(JSContext *cx, FILE *file
     return true;
 }
 
+char *
+js_strdup(JSContext *cx, const char *s)
+{
+    size_t n = strlen(s) + 1;
+    void *p = cx->malloc_(n);
+    if (!p)
+        return NULL;
+    return (char *)js_memcpy(p, s, n);
+}
+
 /*
  * The arguments from ap need to be packaged up into an array and stored
  * into the report struct.
diff --git a/js/src/jscntxt.h b/js/src/jscntxt.h
--- a/js/src/jscntxt.h
+++ b/js/src/jscntxt.h
@@ -2221,6 +2221,9 @@ js_ReportValueErrorFlags(JSContext *cx, 
 
 extern const JSErrorFormatString js_ErrorFormatString[JSErr_Limit];
 
+char *
+js_strdup(JSContext *cx, const char *s);
+
 #ifdef JS_THREADSAFE
 # define JS_ASSERT_REQUEST_DEPTH(cx)  JS_ASSERT((cx)->runtime()->requestDepth >= 1)
 #else