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6995781: Native Memory Tracking (Phase 1)

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7151532: DCmd for hotspot native memory tracking

Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd

Reviewed-by: acorn, coleenp, fparain
This commit is contained in:
Zhengyu Gu 2012-06-28 17:03:16 -04:00
parent 8e42425c92
commit a39b17624a
315 changed files with 7245 additions and 1477 deletions
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6
hotspot/src/share/vm/prims/jniCheck.cpp
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@ -1308,7 +1308,7 @@ JNI_ENTRY_CHECKED(const jchar *,
assert (isCopy == NULL || *isCopy == JNI_TRUE, "GetStringChars didn't return a copy as expected");
size_t len = UNCHECKED()->GetStringLength(env,str) + 1; // + 1 for NULL termination
jint* tagLocation = (jint*) AllocateHeap(len * sizeof(jchar) + sizeof(jint), "checked_jni_GetStringChars");
jint* tagLocation = (jint*) AllocateHeap(len * sizeof(jchar) + sizeof(jint), mtInternal);
*tagLocation = STRING_TAG;
jchar* newResult = (jchar*) (tagLocation + 1);
memcpy(newResult, result, len * sizeof(jchar));
@ -1378,13 +1378,13 @@ JNI_ENTRY_CHECKED(const char *,
assert (isCopy == NULL || *isCopy == JNI_TRUE, "GetStringUTFChars didn't return a copy as expected");
size_t len = strlen(result) + 1; // + 1 for NULL termination
jint* tagLocation = (jint*) AllocateHeap(len + sizeof(jint), "checked_jni_GetStringUTFChars");
jint* tagLocation = (jint*) AllocateHeap(len + sizeof(jint), mtInternal);
*tagLocation = STRING_UTF_TAG;
char* newResult = (char*) (tagLocation + 1);
strcpy(newResult, result);
// Avoiding call to UNCHECKED()->ReleaseStringUTFChars() since that will fire unexpected dtrace probes
// Note that the dtrace arguments for the allocated memory will not match up with this solution.
FreeHeap((char*)result);
FreeHeap((char*)result, mtInternal);
functionExit(env);
return newResult;