diff --git a/opengl/tools/glgen/specs/egl/checks.spec b/opengl/tools/glgen/specs/egl/checks.spec
index 34fb1ee..ae531ee 100644
--- a/opengl/tools/glgen/specs/egl/checks.spec
+++ b/opengl/tools/glgen/specs/egl/checks.spec
@@ -1,13 +1,13 @@
-eglInitialize check major 1 check minor 1
-eglGetConfigs check configs config_size
-eglChooseConfig check configs config_size check num_config 1 sentinel attrib_list EGL_NONE
+eglInitialize nullAllowed major nullAllowed minor check major 1 check minor 1
+eglGetConfigs nullAllowed configs check configs config_size
+eglChooseConfig nullAllowed configs check configs config_size check num_config 1 sentinel attrib_list EGL_NONE
 eglGetConfigAttrib check value 1
-//STUB function: //eglCreateWindowSurface sentinel attrib_list EGL_NONE
-eglCreatePbufferSurface sentinel attrib_list EGL_NONE
-//unsupported: eglCreatePixmapSurface sentinel attrib_list EGL_NONE
+//STUB function: //eglCreateWindowSurface nullAllowed attrib_list sentinel attrib_list EGL_NONE
+eglCreatePbufferSurface nullAllowed attrib_list sentinel attrib_list EGL_NONE
+//unsupported: eglCreatePixmapSurface nullAllowed attrib_list sentinel attrib_list EGL_NONE
 eglCreatePixmapSurface unsupported
 eglCopyBuffers unsupported
 eglQuerySurface check value 1
-eglCreatePbufferFromClientBuffer sentinel attrib_list EGL_NONE
+//STUB function: eglCreatePbufferFromClientBuffer nullAllowed attrib_list sentinel attrib_list EGL_NONE
 eglCreateContext sentinel attrib_list EGL_NONE
 eglQueryContext check value 1
diff --git a/opengl/tools/glgen/specs/gles11/checks.spec b/opengl/tools/glgen/specs/gles11/checks.spec
index 9eb0070..e1f76fd 100644
--- a/opengl/tools/glgen/specs/gles11/checks.spec
+++ b/opengl/tools/glgen/specs/gles11/checks.spec
@@ -19,7 +19,7 @@
 # is not perfect but better than nothing.
 #
 
-glBufferData nullAllowed check data size
+glBufferData nullAllowed data check data size
 glBufferSubData check data size
 # glCompressedTexImage2D
 # glCompressedTexSubImage2D
@@ -45,7 +45,7 @@
 glGenTextures check textures n
 // glGetActiveAttrib
 // glGetActiveUniform
-glGetAttachedShaders nullAllowed check count 1 check shaders maxcount
+glGetAttachedShaders nullAllowed count check count 1 check shaders maxcount
 // glGetBooleanv
 glGetBufferParameter check params 1
 glGetClipPlanef check eqn 4
@@ -57,8 +57,10 @@
 // glGetIntegerv
 glGetLight ifcheck params 3 pname GL_SPOT_DIRECTION ifcheck params 4 pname GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR,GL_EMISSION
 glGetMaterial ifcheck params 4 pname GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR,GL_EMISSION,GL_AMBIENT_AND_DIFFUSE
+glGetProgramBinary nullAllowed length
 // glGetProgramInfoLog
 glGetProgramiv check params 1
+glGetProgramResourceiv nullAllowed length
 glGetRenderbufferParameteriv check params 1
 glGetRenderbufferParameterivOES check params 1
 // glGetShaderInfoLog
@@ -66,6 +68,7 @@
 glGetShaderPrecisionFormat check range 1 check precision 1
 // glGetShaderSource
 // glGetString
+glGetSynciv nullAllowed length
 glGetTexEnv ifcheck params 4 pname GL_TEXTURE_ENV_COLOR
 glGetTexGen ifcheck params 4 pname GL_OBJECT_PLANE,GL_EYE_PLANE
 glGetTexParameter check params 1
@@ -76,15 +79,17 @@
 glLoadMatrix check m 16
 glMaterial ifcheck params 4 pname GL_AMBIENT,GL_DIFFUSE,GL_SPECULAR,GL_EMISSION,GL_AMBIENT_AND_DIFFUSE
 glMultMatrix check m 16
+glObjectLabelKHR nullAllowed label
 glPointParameter check params 1
 glQueryMatrixxOES check mantissa 16 check exponent 16 return -1
 # glReadPixels
 glShaderBinary check binary length
 // glShaderSource
 glTexEnv ifcheck params 4 pname GL_TEXTURE_ENV_COLOR
-glTexImage2D nullAllowed
+glTexImage2D nullAllowed pixels
+glTexImage3D nullAllowed pixels
 glTexParameter check params 1
-glTexSubImage2D nullAllowed
+glTexSubImage2D nullAllowed pixels
 glUniform1 check v count
 glUniform2 check v count*2
 glUniform3 check v count*3
diff --git a/opengl/tools/glgen/specs/jsr239/glspec-checks b/opengl/tools/glgen/specs/jsr239/glspec-checks
index 9f8a793..750481c 100644
--- a/opengl/tools/glgen/specs/jsr239/glspec-checks
+++ b/opengl/tools/glgen/specs/jsr239/glspec-checks
@@ -19,9 +19,9 @@
 glMultMatrix check m 16
 glPointParameter check params 1
 glTexEnv ifcheck params 1 pname GL_TEXTURE_ENV_MODE,GL_COMBINE_RGB,GL_COMBINE_ALPHA ifcheck params 4 pname GL_TEXTURE_ENV_COLOR
-glTexImage2D nullAllowed
-glTexSubImage2D nullAllowed
-glBufferData nullAllowed check data size
+glTexImage2D nullAllowed pixels
+glTexSubImage2D nullAllowed pixels
+glBufferData nullAllowed data check data size
 glBufferSubData check data size
 glTexParameter check params 1
 glQueryMatrixxOES check mantissa 16 check exponent 16 return -1
diff --git a/opengl/tools/glgen/src/JniCodeEmitter.java b/opengl/tools/glgen/src/JniCodeEmitter.java
index 5a412bf..6caf076 100644
--- a/opengl/tools/glgen/src/JniCodeEmitter.java
+++ b/opengl/tools/glgen/src/JniCodeEmitter.java
@@ -222,12 +222,13 @@
         needsExit = true;
     }
 
-    boolean isNullAllowed(CFunc cfunc) {
+    boolean isNullAllowed(CFunc cfunc, String cname) {
         String[] checks = mChecker.getChecks(cfunc.getName());
         int index = 1;
         if (checks != null) {
             while (index < checks.length) {
-                if (checks[index].equals("nullAllowed")) {
+                if (checks[index].equals("nullAllowed") &&
+                    checks[index + 1].equals(cname)) {
                     return true;
                 } else {
                     index = skipOneCheck(checks, index);
@@ -252,6 +253,22 @@
         return false;
     }
 
+    boolean hasCheckTest(CFunc cfunc, String cname) {
+        String[] checks = mChecker.getChecks(cfunc.getName());
+        int index = 1;
+        if (checks != null) {
+            while (index < checks.length) {
+                if (checks[index].startsWith("check") &&
+                    cname != null && cname.equals(checks[index + 1])) {
+                    return true;
+                } else {
+                    index = skipOneCheck(checks, index);
+                }
+            }
+        }
+        return false;
+    }
+
     boolean hasIfTest(CFunc cfunc) {
         String[] checks = mChecker.getChecks(cfunc.getName());
         int index = 1;
@@ -281,7 +298,7 @@
         } else if (checks[index].equals("requires")) {
             index += 2;
         } else if (checks[index].equals("nullAllowed")) {
-            index += 1;
+            index += 2;
         } else {
             System.out.println("Error: unknown keyword \"" +
                                checks[index] + "\"");
@@ -469,6 +486,37 @@
         }
     }
 
+    void emitStringCheck(CFunc cfunc, String cname, PrintStream out, String iii) {
+
+        String[] checks = mChecker.getChecks(cfunc.getName());
+
+        int index = 1;
+        if (checks != null) {
+            while (index < checks.length) {
+                if (checks[index].startsWith("check")) {
+                    if (cname != null && !cname.equals(checks[index + 1])) {
+                    index += 3;
+                    continue;
+                }
+                    out.println(iii + "_stringlen = _env->GetStringUTFLength(" + cname + ");");
+                    out.println(iii + "if (" + checks[index + 2] + " > _stringlen) {");
+                    out.println(iii + indent + "_exception = 1;");
+                    out.println(iii + indent +
+                            "_exceptionType = \"java/lang/ArrayIndexOutOfBoundsException\";");
+                    out.println(iii + indent +
+                            "_exceptionMessage = \"length of " + cname + " is shorter than " +
+                            checks[index + 2] + " argument\";");
+                    out.println(iii + indent + "goto exit;");
+                    out.println(iii + "}");
+                    index += 3;
+                    needsExit = true;
+                } else {
+                    index = skipOneCheck(checks, index);
+                }
+            }
+        }
+    }
+
     void emitLocalVariablesForSentinel(CFunc cfunc, PrintStream out) {
 
         String[] checks = mChecker.getChecks(cfunc.getName());
@@ -1066,12 +1114,20 @@
 
         // Emit local variable declaration for strings
         if (stringArgs.size() > 0) {
+            boolean requiresStringLengthCheck = false;
             for (int i = 0; i < stringArgs.size(); i++) {
                 int idx = stringArgs.get(i).intValue();
                 int cIndex = jfunc.getArgCIndex(idx);
                 String cname = cfunc.getArgName(cIndex);
 
                 out.println(indent + "const char* _native" + cname + " = 0;");
+                if (hasCheckTest(cfunc, cname)) {
+                    requiresStringLengthCheck = true;
+                }
+            }
+
+            if (requiresStringLengthCheck) {
+                out.println(indent + "jsize _stringlen = 0;");
             }
 
             out.println();
@@ -1084,19 +1140,34 @@
                 int cIndex = jfunc.getArgCIndex(idx);
                 String cname = cfunc.getArgName(cIndex);
 
+                boolean nullAllowed = isNullAllowed(cfunc, cname);
+                String nullAllowedIndent = nullAllowed ? indent : "";
+
                 CType type = cfunc.getArgType(jfunc.getArgCIndex(idx));
                 String decl = type.getDeclaration();
-                needsExit = true;
-                out.println(indent + "if (!" + cname + ") {");
-                out.println(indent + indent + "_exception = 1;");
-                out.println(indent + indent +
-                            "_exceptionType = \"java/lang/IllegalArgumentException\";");
-                out.println(indent + indent +
-                            "_exceptionMessage = \"" + cname + " == null\";");
-                out.println(indent + indent + "goto exit;");
-                out.println(indent + "}");
 
-                out.println(indent + "_native" + cname + " = _env->GetStringUTFChars(" + cname + ", 0);");
+                if (nullAllowed) {
+                    out.println(indent + "if (" + cname + ") {");
+                } else {
+                    needsExit = true;
+                    out.println(indent + "if (!" + cname + ") {");
+                    out.println(indent + indent + "_exception = 1;");
+                    out.println(indent + indent +
+                            "_exceptionType = \"java/lang/IllegalArgumentException\";");
+                    out.println(indent + indent +
+                            "_exceptionMessage = \"" + cname + " == null\";");
+                    out.println(indent + indent + "goto exit;");
+                    out.println(indent + "}");
+                }
+
+                out.println(nullAllowedIndent + indent + "_native" + cname +
+                        " = _env->GetStringUTFChars(" + cname + ", 0);");
+
+                emitStringCheck(cfunc, cname, out, nullAllowedIndent + indent);
+
+                if (nullAllowed) {
+                    out.println(indent + "}");
+                }
             }
 
             out.println();
@@ -1115,85 +1186,126 @@
                 remaining = ((numArrays + numBuffers) <= 1) ? "_remaining" :
                     "_" + cname + "Remaining";
 
+                boolean nullAllowed = isNullAllowed(cfunc, cname);
+                String nullAllowedIndent = nullAllowed ? indent : "";
+
                 if (jfunc.getArgType(idx).isArray()
                        && !jfunc.getArgType(idx).isEGLHandle()) {
                     needsExit = true;
-                    out.println(indent + "if (!" + cname + "_ref) {");
-                    out.println(indent + indent + "_exception = 1;");
-                    out.println(indent + indent +
-                                "_exceptionType = \"java/lang/IllegalArgumentException\";");
-                    out.println(indent + indent +
-                                "_exceptionMessage = \"" + cname +" == null\";");
-                    out.println(indent + indent + "goto exit;");
-                    out.println(indent + "}");
-                    out.println(indent + "if (" + offset + " < 0) {");
-                    out.println(indent + indent + "_exception = 1;");
-                    out.println(indent + indent +
-                                "_exceptionType = \"java/lang/IllegalArgumentException\";");
-                    out.println(indent + indent +
-                                "_exceptionMessage = \"" + offset +" < 0\";");
-                    out.println(indent + indent + "goto exit;");
-                    out.println(indent + "}");
 
-                    out.println(indent + remaining + " = " +
-                                    (mUseCPlusPlus ? "_env" : "(*_env)") +
-                                    "->GetArrayLength(" +
-                                    (mUseCPlusPlus ? "" : "_env, ") +
-                                    cname + "_ref) - " + offset + ";");
+                    if (nullAllowed) {
+                        out.println(indent + "if (" + cname + "_ref) {");
+                    }
+                    else
+                    {
+                        out.println(indent + "if (!" + cname + "_ref) {");
+                        out.println(indent + indent + "_exception = 1;");
+                        out.println(indent + indent +
+                                "_exceptionType = " +
+                                "\"java/lang/IllegalArgumentException\";");
+                        out.println(indent + indent +
+                                "_exceptionMessage = \"" + cname +
+                                " == null\";");
+                        out.println(indent + indent + "goto exit;");
+                        out.println(indent + "}");
+                    }
+
+                    out.println(nullAllowedIndent + indent + "if (" + offset +
+                            " < 0) {");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exception = 1;");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exceptionType = " +
+                            "\"java/lang/IllegalArgumentException\";");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exceptionMessage = \"" + offset +" < 0\";");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "goto exit;");
+                    out.println(nullAllowedIndent + indent + "}");
+
+                    out.println(nullAllowedIndent + indent + remaining + " = " +
+                            (mUseCPlusPlus ? "_env" : "(*_env)") +
+                            "->GetArrayLength(" +
+                            (mUseCPlusPlus ? "" : "_env, ") +
+                            cname + "_ref) - " + offset + ";");
 
                     emitNativeBoundsChecks(cfunc, cname, out, false,
-                                           emitExceptionCheck,
-                                           offset, remaining, "    ");
+                            emitExceptionCheck, offset, remaining,
+                            nullAllowedIndent + indent);
 
-                    out.println(indent +
+                    out.println(nullAllowedIndent + indent +
                                 cname +
                                 "_base = (" +
                                 cfunc.getArgType(cIndex).getDeclaration() +
                                 ")");
                     String arrayGetter = jfunc.getArgType(idx).getArrayGetterForPrimitiveArray();
-                    out.println(indent + "    " +
+                    out.println(nullAllowedIndent + indent + "    " +
                                 (mUseCPlusPlus ? "_env" : "(*_env)") +
                                 "->" + arrayGetter + "(" +
                                 (mUseCPlusPlus ? "" : "_env, ") +
                                 jfunc.getArgName(idx) +
                                 "_ref, (jboolean *)0);");
-                    out.println(indent +
+                    out.println(nullAllowedIndent + indent +
                                 cname + " = " + cname + "_base + " + offset + ";");
 
                     emitSentinelCheck(cfunc, cname, out, false,
-                                      emitExceptionCheck, offset,
-                                      remaining, indent);
+                            emitExceptionCheck, offset, remaining,
+                            nullAllowedIndent + indent);
+
+                    if (nullAllowed) {
+                        out.println(indent + "}");
+                    }
+
                     out.println();
                 } else if (jfunc.getArgType(idx).isArray()
                               && jfunc.getArgType(idx).isEGLHandle()) {
                     needsExit = true;
-                    out.println(indent + "if (!" + cname + "_ref) {");
-                    out.println(indent + indent + "_exception = 1;");
-                    out.println(indent + indent +
-                                "_exceptionType = \"java/lang/IllegalArgumentException\";");
-                    out.println(indent + indent + "_exceptionMessage = \"" + cname +" == null\";");
-                    out.println(indent + indent + "goto exit;");
-                    out.println(indent + "}");
-                    out.println(indent + "if (" + offset + " < 0) {");
-                    out.println(indent + indent + "_exception = 1;");
-                    out.println(indent + indent +
-                                "_exceptionType = \"java/lang/IllegalArgumentException\";");
-                    out.println(indent + indent + "_exceptionMessage = \"" + offset +" < 0\";");
-                    out.println(indent + indent + "goto exit;");
-                    out.println(indent + "}");
 
-                    out.println(indent + remaining + " = " +
+                    if (nullAllowed) {
+                        out.println(indent + "if (" + cname + "_ref) {");
+                    }
+                    else
+                    {
+                        out.println(indent + "if (!" + cname + "_ref) {");
+                        out.println(indent + indent + "_exception = 1;");
+                        out.println(indent + indent + "_exceptionType = " +
+                                "\"java/lang/IllegalArgumentException\";");
+                        out.println(indent + indent + "_exceptionMessage = \"" +
+                                cname +" == null\";");
+                        out.println(indent + indent + "goto exit;");
+                        out.println(indent + "}");
+                    }
+
+                    out.println(nullAllowedIndent + indent + "if (" + offset +
+                            " < 0) {");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exception = 1;");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exceptionType = " +
+                            "\"java/lang/IllegalArgumentException\";");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "_exceptionMessage = \"" + offset +" < 0\";");
+                    out.println(nullAllowedIndent + indent + indent +
+                            "goto exit;");
+                    out.println(nullAllowedIndent + indent + "}");
+
+                    out.println(nullAllowedIndent + indent + remaining + " = " +
                                     (mUseCPlusPlus ? "_env" : "(*_env)") +
                                     "->GetArrayLength(" +
                                     (mUseCPlusPlus ? "" : "_env, ") +
                                     cname + "_ref) - " + offset + ";");
                     emitNativeBoundsChecks(cfunc, cname, out, false,
-                                           emitExceptionCheck,
-                                           offset, remaining, "    ");
-                    out.println(indent +
+                            emitExceptionCheck, offset, remaining,
+                            nullAllowedIndent + indent);
+                    out.println(nullAllowedIndent + indent +
                                 jfunc.getArgName(idx) + " = new " +
                                 cfunc.getArgType(cIndex).getBaseType() +
                                "["+ remaining + "];");
+
+                    if (nullAllowed) {
+                        out.println(indent + "}");
+                    }
+
                     out.println();
                 } else if (jfunc.getArgType(idx).isBuffer()) {
                     String array = numBufferArgs <= 1 ? "_array" :
@@ -1201,7 +1313,7 @@
                     String bufferOffset = numBufferArgs <= 1 ? "_bufferOffset" :
                         "_" + cfunc.getArgName(cIndex) + "BufferOffset";
 
-                    boolean nullAllowed = isNullAllowed(cfunc) || isPointerFunc;
+                    nullAllowed = nullAllowed || isPointerFunc;
                     if (nullAllowed) {
                         out.println(indent + "if (" + cname + "_buf) {");
                         out.print(indent);
@@ -1254,7 +1366,8 @@
                 String array = numBufferArgs <= 1 ? "_array" :
                             "_" + cfunc.getArgName(cIndex) + "Array";
 
-                boolean nullAllowed = isNullAllowed(cfunc) || isPointerFunc;
+                boolean nullAllowed = isNullAllowed(cfunc, cname) ||
+                        isPointerFunc;
                 if (nullAllowed) {
                     out.println(indent + "if (" + cname + "_buf && " + cname +" == NULL) {");
                 } else {
diff --git a/opengl/tools/glgen/stubs/egl/eglCreatePbufferFromClientBuffer.cpp b/opengl/tools/glgen/stubs/egl/eglCreatePbufferFromClientBuffer.cpp
index 6199637..497d284 100755
--- a/opengl/tools/glgen/stubs/egl/eglCreatePbufferFromClientBuffer.cpp
+++ b/opengl/tools/glgen/stubs/egl/eglCreatePbufferFromClientBuffer.cpp
@@ -13,34 +13,30 @@
     jint _remaining;
     EGLint *attrib_list = (EGLint *) 0;
 
-    if (!attrib_list_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "attrib_list == null";
-        goto exit;
-    }
-    if (offset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "offset < 0";
-        goto exit;
-    }
-    _remaining = _env->GetArrayLength(attrib_list_ref) - offset;
-    attrib_list_base = (EGLint *)
-        _env->GetIntArrayElements(attrib_list_ref, (jboolean *)0);
-    attrib_list = attrib_list_base + offset;
-    attrib_list_sentinel = false;
-    for (int i = _remaining - 1; i >= 0; i--)  {
-        if (attrib_list[i] == EGL_NONE){
-            attrib_list_sentinel = true;
-            break;
+    if (attrib_list_ref) {
+        if (offset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "offset < 0";
+            goto exit;
         }
-    }
-    if (attrib_list_sentinel == false) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "attrib_list must contain EGL_NONE!";
-        goto exit;
+        _remaining = _env->GetArrayLength(attrib_list_ref) - offset;
+        attrib_list_base = (EGLint *)
+            _env->GetIntArrayElements(attrib_list_ref, (jboolean *)0);
+        attrib_list = attrib_list_base + offset;
+        attrib_list_sentinel = false;
+        for (int i = _remaining - 1; i >= 0; i--)  {
+            if (attrib_list[i] == EGL_NONE){
+                attrib_list_sentinel = true;
+                break;
+            }
+        }
+        if (attrib_list_sentinel == false) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "attrib_list must contain EGL_NONE!";
+            goto exit;
+        }
     }
 
     _returnValue = eglCreatePbufferFromClientBuffer(
diff --git a/opengl/tools/glgen/stubs/egl/eglCreateWindowSurface.cpp b/opengl/tools/glgen/stubs/egl/eglCreateWindowSurface.cpp
index cc7b85d..355c4b0 100644
--- a/opengl/tools/glgen/stubs/egl/eglCreateWindowSurface.cpp
+++ b/opengl/tools/glgen/stubs/egl/eglCreateWindowSurface.cpp
@@ -14,18 +14,32 @@
     EGLint *attrib_list = (EGLint *) 0;
     android::sp<ANativeWindow> window;
 
-    if (!attrib_list_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "attrib_list == null";
-        goto exit;
+    if (attrib_list_ref) {
+        if (offset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "offset < 0";
+            goto exit;
+        }
+        _remaining = _env->GetArrayLength(attrib_list_ref) - offset;
+        attrib_list_base = (EGLint *)
+            _env->GetIntArrayElements(attrib_list_ref, (jboolean *)0);
+        attrib_list = attrib_list_base + offset;
+        attrib_list_sentinel = 0;
+        for (int i = _remaining - 1; i >= 0; i--)  {
+            if (*((EGLint*)(attrib_list + i)) == EGL_NONE){
+                attrib_list_sentinel = 1;
+                break;
+            }
+        }
+        if (attrib_list_sentinel == 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "attrib_list must contain EGL_NONE!";
+            goto exit;
+        }
     }
-    if (offset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "offset < 0";
-        goto exit;
-    }
+
     if (win == NULL) {
 not_valid_surface:
         _exception = 1;
@@ -39,24 +53,6 @@
     if (window == NULL)
         goto not_valid_surface;
 
-    _remaining = _env->GetArrayLength(attrib_list_ref) - offset;
-    attrib_list_base = (EGLint *)
-        _env->GetIntArrayElements(attrib_list_ref, (jboolean *)0);
-    attrib_list = attrib_list_base + offset;
-    attrib_list_sentinel = 0;
-    for (int i = _remaining - 1; i >= 0; i--)  {
-        if (*((EGLint*)(attrib_list + i)) == EGL_NONE){
-            attrib_list_sentinel = 1;
-            break;
-        }
-    }
-    if (attrib_list_sentinel == 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "attrib_list must contain EGL_NONE!";
-        goto exit;
-    }
-
     _returnValue = eglCreateWindowSurface(
         (EGLDisplay)dpy_native,
         (EGLConfig)config_native,
diff --git a/opengl/tools/glgen/stubs/gles11/glGetActiveAttrib.cpp b/opengl/tools/glgen/stubs/gles11/glGetActiveAttrib.cpp
index a8d63d9..6cdbf71 100644
--- a/opengl/tools/glgen/stubs/gles11/glGetActiveAttrib.cpp
+++ b/opengl/tools/glgen/stubs/gles11/glGetActiveAttrib.cpp
@@ -18,22 +18,18 @@
     jint _nameRemaining;
     char *name = (char *) 0;
 
-    if (!length_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "length == null";
-        goto exit;
+    if (length_ref) {
+        if (lengthOffset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "lengthOffset < 0";
+            goto exit;
+        }
+        _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
+        length_base = (GLsizei *)
+            _env->GetIntArrayElements(length_ref, (jboolean *)0);
+        length = length_base + lengthOffset;
     }
-    if (lengthOffset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "lengthOffset < 0";
-        goto exit;
-    }
-    _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
-    length_base = (GLsizei *)
-        _env->GetIntArrayElements(length_ref, (jboolean *)0);
-    length = length_base + lengthOffset;
 
     if (!size_ref) {
         _exception = 1;
diff --git a/opengl/tools/glgen/stubs/gles11/glGetActiveUniform.cpp b/opengl/tools/glgen/stubs/gles11/glGetActiveUniform.cpp
index 68e8389..07094bd 100644
--- a/opengl/tools/glgen/stubs/gles11/glGetActiveUniform.cpp
+++ b/opengl/tools/glgen/stubs/gles11/glGetActiveUniform.cpp
@@ -18,22 +18,18 @@
     jint _nameRemaining;
     char *name = (char *) 0;
 
-    if (!length_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "length == null";
-        goto exit;
+    if (length_ref) {
+        if (lengthOffset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "lengthOffset < 0";
+            goto exit;
+        }
+        _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
+        length_base = (GLsizei *)
+            _env->GetIntArrayElements(length_ref, (jboolean *)0);
+        length = length_base + lengthOffset;
     }
-    if (lengthOffset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "lengthOffset < 0";
-        goto exit;
-    }
-    _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
-    length_base = (GLsizei *)
-        _env->GetIntArrayElements(length_ref, (jboolean *)0);
-    length = length_base + lengthOffset;
 
     if (!size_ref) {
         _exception = 1;
diff --git a/opengl/tools/glgen/stubs/gles11/glGetActiveUniformBlockName.cpp b/opengl/tools/glgen/stubs/gles11/glGetActiveUniformBlockName.cpp
index 6104c84..24086e4 100644
--- a/opengl/tools/glgen/stubs/gles11/glGetActiveUniformBlockName.cpp
+++ b/opengl/tools/glgen/stubs/gles11/glGetActiveUniformBlockName.cpp
@@ -12,22 +12,18 @@
     jint _nameRemaining;
     GLchar* _name = (GLchar*)0;
 
-    if (!length_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "length == null";
-        goto exit;
+    if (length_ref) {
+        if (lengthOffset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "lengthOffset < 0";
+            goto exit;
+        }
+        _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
+        _length_base = (GLsizei*)_env->GetIntArrayElements(
+                length_ref, (jboolean*)0);
+        _length = _length_base + lengthOffset;
     }
-    if (lengthOffset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "lengthOffset < 0";
-        goto exit;
-    }
-    _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
-    _length_base = (GLsizei*)_env->GetIntArrayElements(
-            length_ref, (jboolean*)0);
-    _length = _length_base + lengthOffset;
 
     if (!name_ref) {
         _exception = 1;
diff --git a/opengl/tools/glgen/stubs/gles11/glGetShaderSource.cpp b/opengl/tools/glgen/stubs/gles11/glGetShaderSource.cpp
index d9808ef..55469db 100644
--- a/opengl/tools/glgen/stubs/gles11/glGetShaderSource.cpp
+++ b/opengl/tools/glgen/stubs/gles11/glGetShaderSource.cpp
@@ -12,22 +12,18 @@
     jint _sourceRemaining;
     char *source = (char *) 0;
 
-    if (!length_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "length == null";
-        goto exit;
+    if (length_ref) {
+        if (lengthOffset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "lengthOffset < 0";
+            goto exit;
+        }
+        _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
+        length_base = (GLsizei *)
+            _env->GetIntArrayElements(length_ref, (jboolean *)0);
+        length = length_base + lengthOffset;
     }
-    if (lengthOffset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "lengthOffset < 0";
-        goto exit;
-    }
-    _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
-    length_base = (GLsizei *)
-        _env->GetIntArrayElements(length_ref, (jboolean *)0);
-    length = length_base + lengthOffset;
 
     if (!source_ref) {
         _exception = 1;
diff --git a/opengl/tools/glgen/stubs/gles11/glGetTransformFeedbackVarying.cpp b/opengl/tools/glgen/stubs/gles11/glGetTransformFeedbackVarying.cpp
index cb656c8..47f232d 100644
--- a/opengl/tools/glgen/stubs/gles11/glGetTransformFeedbackVarying.cpp
+++ b/opengl/tools/glgen/stubs/gles11/glGetTransformFeedbackVarying.cpp
@@ -18,22 +18,18 @@
     jint _nameRemaining;
     char *name = (char *) 0;
 
-    if (!length_ref) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "length == null";
-        goto exit;
+    if (length_ref) {
+        if (lengthOffset < 0) {
+            _exception = 1;
+            _exceptionType = "java/lang/IllegalArgumentException";
+            _exceptionMessage = "lengthOffset < 0";
+            goto exit;
+        }
+        _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
+        length_base = (GLsizei *)
+            _env->GetIntArrayElements(length_ref, (jboolean *)0);
+        length = length_base + lengthOffset;
     }
-    if (lengthOffset < 0) {
-        _exception = 1;
-        _exceptionType = "java/lang/IllegalArgumentException";
-        _exceptionMessage = "lengthOffset < 0";
-        goto exit;
-    }
-    _lengthRemaining = _env->GetArrayLength(length_ref) - lengthOffset;
-    length_base = (GLsizei *)
-        _env->GetIntArrayElements(length_ref, (jboolean *)0);
-    length = length_base + lengthOffset;
 
     if (!size_ref) {
         _exception = 1;