From eada5376d9c34f77bd3ba86a2ea674e3bde5e961 Mon Sep 17 00:00:00 2001
From: Jeff Tinker <jtinker@google.com>
Date: Tue, 21 May 2013 12:48:14 -0700
Subject: Improve exception error messages to help diagnose app errors

bug: 9072051

Change-Id: I45057951d1a62b1b4a996e85f01601239e1b7161
---
 media/jni/android_media_MediaDrm.cpp | 102 ++++++++++++++++++++++++-----------
 1 file changed, 70 insertions(+), 32 deletions(-)

(limited to 'media/jni')

diff --git a/media/jni/android_media_MediaDrm.cpp b/media/jni/android_media_MediaDrm.cpp
index ec88949..3d7784d 100644
--- a/media/jni/android_media_MediaDrm.cpp
+++ b/media/jni/android_media_MediaDrm.cpp
@@ -128,7 +128,8 @@ JNIDrmListener::JNIDrmListener(JNIEnv* env, jobject thiz, jobject weak_thiz)
     jclass clazz = env->GetObjectClass(thiz);
     if (clazz == NULL) {
         ALOGE("Can't find android/media/MediaDrm");
-        jniThrowException(env, "java/lang/Exception", NULL);
+        jniThrowException(env, "java/lang/Exception",
+                          "Can't find android/media/MediaDrm");
         return;
     }
     mClass = (jclass)env->NewGlobalRef(clazz);
@@ -408,13 +409,15 @@ static KeyedVector<String8, String8> HashMapToKeyedVector(JNIEnv *env, jobject &
                 if (entry) {
                     jobject obj = env->CallObjectMethod(entry, gFields.entry.getKey);
                     if (!env->IsInstanceOf(obj, clazz)) {
-                        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+                        jniThrowException(env, "java/lang/IllegalArgumentException",
+                                          "HashMap key is not a String");
                     }
                     jstring jkey = static_cast<jstring>(obj);
 
                     obj = env->CallObjectMethod(entry, gFields.entry.getValue);
                     if (!env->IsInstanceOf(obj, clazz)) {
-                        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+                        jniThrowException(env, "java/lang/IllegalArgumentException",
+                                          "HashMap value is not a String");
                     }
                     jstring jvalue = static_cast<jstring>(obj);
 
@@ -486,12 +489,12 @@ static sp<JDrm> setDrm(
 static bool CheckSession(JNIEnv *env, const sp<IDrm> &drm, jbyteArray const &jsessionId)
 {
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException", "MediaDrm obj is null");
         return false;
     }
 
     if (jsessionId == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException", "sessionId is null");
         return false;
     }
     return true;
@@ -557,14 +560,15 @@ static void android_media_MediaDrm_native_setup(
         jobject weak_this, jbyteArray uuidObj) {
 
     if (uuidObj == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException", "uuid is null");
         return;
     }
 
     Vector<uint8_t> uuid = JByteArrayToVector(env, uuidObj);
 
     if (uuid.size() != 16) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "invalid UUID size, expected 16 bytes");
         return;
     }
 
@@ -604,7 +608,7 @@ static jboolean android_media_MediaDrm_isCryptoSchemeSupportedNative(
         jniThrowException(
                 env,
                 "java/lang/IllegalArgumentException",
-                NULL);
+                "invalid UUID size, expected 16 bytes");
         return false;
     }
 
@@ -616,7 +620,8 @@ static jbyteArray android_media_MediaDrm_openSession(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return NULL;
     }
 
@@ -712,7 +717,8 @@ static jbyteArray android_media_MediaDrm_provideKeyResponse(
     Vector<uint8_t> sessionId(JByteArrayToVector(env, jsessionId));
 
     if (jresponse == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "key response is null");
         return NULL;
     }
     Vector<uint8_t> response(JByteArrayToVector(env, jresponse));
@@ -729,7 +735,8 @@ static void android_media_MediaDrm_removeKeys(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (jkeysetId == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "keySetId is null");
         return;
     }
 
@@ -788,7 +795,8 @@ static jobject android_media_MediaDrm_getProvisionRequest(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return NULL;
     }
 
@@ -824,12 +832,14 @@ static void android_media_MediaDrm_provideProvisionResponse(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return;
     }
 
     if (jresponse == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "provision response is null");
         return;
     }
 
@@ -845,7 +855,8 @@ static jobject android_media_MediaDrm_getSecureStops(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return NULL;
     }
 
@@ -865,7 +876,8 @@ static void android_media_MediaDrm_releaseSecureStops(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return;
     }
 
@@ -881,12 +893,14 @@ static jstring android_media_MediaDrm_getPropertyString(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return NULL;
     }
 
     if (jname == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property name String is null");
         return NULL;
     }
 
@@ -907,12 +921,14 @@ static jbyteArray android_media_MediaDrm_getPropertyByteArray(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return NULL;
     }
 
     if (jname == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property name String is null");
         return NULL;
     }
 
@@ -933,12 +949,20 @@ static void android_media_MediaDrm_setPropertyString(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return;
     }
 
-    if (jname == NULL || jvalue == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+    if (jname == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property name String is null");
+        return;
+    }
+
+    if (jvalue == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property value String is null");
         return;
     }
 
@@ -955,12 +979,20 @@ static void android_media_MediaDrm_setPropertyByteArray(
     sp<IDrm> drm = GetDrm(env, thiz);
 
     if (drm == NULL) {
-        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        jniThrowException(env, "java/lang/IllegalStateException",
+                          "MediaDrm obj is null");
         return;
     }
 
-    if (jname == NULL || jvalue == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+    if (jname == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property name String is null");
+        return;
+    }
+
+    if (jvalue == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "property value byte array is null");
         return;
     }
 
@@ -983,7 +1015,8 @@ static void android_media_MediaDrm_setCipherAlgorithmNative(
     }
 
     if (jalgorithm == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "algorithm String is null");
         return;
     }
 
@@ -1006,7 +1039,8 @@ static void android_media_MediaDrm_setMacAlgorithmNative(
     }
 
     if (jalgorithm == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "algorithm String is null");
         return;
     }
 
@@ -1030,7 +1064,8 @@ static jbyteArray android_media_MediaDrm_encryptNative(
     }
 
     if (jkeyId == NULL || jinput == NULL || jiv == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "required argument is null");
         return NULL;
     }
 
@@ -1058,7 +1093,8 @@ static jbyteArray android_media_MediaDrm_decryptNative(
     }
 
     if (jkeyId == NULL || jinput == NULL || jiv == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "required argument is null");
         return NULL;
     }
 
@@ -1085,7 +1121,8 @@ static jbyteArray android_media_MediaDrm_signNative(
     }
 
     if (jkeyId == NULL || jmessage == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "required argument is null");
         return NULL;
     }
 
@@ -1112,7 +1149,8 @@ static jboolean android_media_MediaDrm_verifyNative(
     }
 
     if (jkeyId == NULL || jmessage == NULL || jsignature == NULL) {
-        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        jniThrowException(env, "java/lang/IllegalArgumentException",
+                          "required argument is null");
         return false;
     }
 
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