/*
* Log an object with some additional info.
*
* Pass in the number of elements in the array (or 0 if this is not an
* array object), and the number of additional objects that are identical
* or equivalent to the original.
*/
static void logSummaryLine(const Object* obj, size_t elems, int identical, int equiv)
{
if (obj == NULL) {
LOGW(" NULL reference (count=%d)", equiv);
return;
}
if (obj == kClearedJniWeakGlobal) {
LOGW(" cleared jweak (count=%d)", equiv);
return;
}
std::string className(dvmHumanReadableType(obj));
if (obj->clazz == gDvm.classJavaLangClass) {
// We're summarizing multiple instances, so using the exemplar
// Class' type parameter here would be misleading.
className = "java.lang.Class";
}
if (elems != 0) {
StringAppendF(&className, " (%zd elements)", elems);
}
size_t total = identical + equiv + 1;
std::string msg(StringPrintf("%5d of %s", total, className.c_str()));
if (identical + equiv != 0) {
StringAppendF(&msg, " (%d unique instances)", equiv + 1);
}
LOGW(" %s", msg.c_str());
}
static void printWaitMessage(const DebugOutputTarget* target, const char* detail, Object* obj,
Thread* thread)
{
std::string msg(StringPrintf(" - waiting %s <%p> ", detail, obj));
if (obj->clazz != gDvm.classJavaLangClass) {
// I(16573) - waiting on <0xf5feda38> (a java.util.LinkedList)
// I(16573) - waiting on <0xf5ed54f8> (a java.lang.Class<java.lang.ref.ReferenceQueue>)
msg += "(a " + dvmHumanReadableType(obj) + ")";
}
if (thread != NULL) {
std::string threadName(dvmGetThreadName(thread));
StringAppendF(&msg, " held by tid=%d (%s)", thread->threadId, threadName.c_str());
}
dvmPrintDebugMessage(target, "%s\n", msg.c_str());
}
/*
* Verify that "obj" is non-null and is an instance of "clazz".
* Used to implement reflection on fields and methods.
*
* Returns "false" and throws an exception if not.
*/
bool dvmVerifyObjectInClass(Object* obj, ClassObject* clazz) {
ClassObject* exceptionClass = NULL;
if (obj == NULL) {
exceptionClass = gDvm.exNullPointerException;
} else if (!dvmInstanceof(obj->clazz, clazz)) {
exceptionClass = gDvm.exIllegalArgumentException;
}
if (exceptionClass == NULL) {
return true;
}
std::string expectedClassName(dvmHumanReadableDescriptor(clazz->descriptor));
std::string actualClassName(dvmHumanReadableType(obj));
dvmThrowExceptionFmt(exceptionClass, "expected receiver of type %s, but got %s",
expectedClassName.c_str(), actualClassName.c_str());
return false;
}
static void throwArgumentTypeMismatch(int argIndex, ClassObject* expected, DataObject* arg) {
std::string expectedClassName(dvmHumanReadableDescriptor(expected->descriptor));
std::string actualClassName = dvmHumanReadableType(arg);
dvmThrowExceptionFmt(gDvm.exIllegalArgumentException, "argument %d should have type %s, got %s",
argIndex + 1, expectedClassName.c_str(), actualClassName.c_str());
}
/*
* Dump a summary of an array of references to the log file.
*
* This is used to dump the contents of ReferenceTable and IndirectRefTable
* structs.
*/
void dvmDumpReferenceTableContents(Object* const* refs, size_t count,
const char* descr)
{
LOGW("%s reference table (%p) dump:", descr, refs);
if (count == 0) {
LOGW(" (empty)");
return;
}
// Dump the most recent N entries.
const size_t kLast = 10;
int first = count - kLast;
if (first < 0) {
first = 0;
}
LOGW(" Last %d entries (of %d):", (count - first), count);
for (int idx = count - 1; idx >= first; --idx) {
const Object* ref = refs[idx];
if (ref == NULL) {
continue;
}
if (ref == kClearedJniWeakGlobal) {
LOGW(" %5d: cleared jweak", idx);
continue;
}
if (ref->clazz == NULL) {
// should only be possible right after a plain dvmMalloc().
size_t size = dvmObjectSizeInHeap(ref);
LOGW(" %5d: %p (raw) (%zd bytes)", idx, ref, size);
continue;
}
std::string className(dvmHumanReadableType(ref));
std::string extras;
size_t elems = getElementCount(ref);
if (elems != 0) {
StringAppendF(&extras, " (%zd elements)", elems);
} else if (ref->clazz == gDvm.classJavaLangString) {
const StringObject* str =
reinterpret_cast<const StringObject*>(ref);
extras += " \"";
size_t count = 0;
char* s = dvmCreateCstrFromString(str);
char* p = s;
for (; *p && count < 16; ++p, ++count) {
extras += *p;
}
if (*p == 0) {
extras += "\"";
} else {
StringAppendF(&extras, "... (%d chars)", str->length());
}
free(s);
}
LOGW(" %5d: %p %s%s", idx, ref, className.c_str(), extras.c_str());
}
// Make a copy of the table, and sort it.
Object** tableCopy = (Object**)malloc(sizeof(Object*) * count);
if (tableCopy == NULL) {
LOGE("Unable to copy table with %d elements", count);
return;
}
memcpy(tableCopy, refs, sizeof(Object*) * count);
qsort(tableCopy, count, sizeof(Object*), compareObject);
refs = tableCopy; // use sorted list
// Remove any uninteresting stuff from the list. The sort moved them all to the end.
while (count > 0 && refs[count-1] == NULL) {
--count;
}
while (count > 0 && refs[count-1] == kClearedJniWeakGlobal) {
--count;
}
if (count == 0) {
return;
}
// Dump a summary of the whole table.
LOGW(" Summary:");
size_t equiv, identical;
equiv = identical = 0;
size_t idx;
size_t elems;
for (idx = 1; idx < count; idx++) {
elems = getElementCount(refs[idx-1]);
if (refs[idx] == refs[idx-1]) {
// same reference, added more than once.
identical++;
} else if (refs[idx]->clazz == refs[idx-1]->clazz &&
getElementCount(refs[idx]) == elems)
{
// same class / element count, different object.
equiv++;
} else {
// different class.
logSummaryLine(refs[idx-1], elems, identical, equiv);
equiv = identical = 0;
}
}
// Handle the last entry (everything above outputs refs[i-1]).
elems = getElementCount(refs[idx-1]);
logSummaryLine(refs[count-1], elems, identical, equiv);
free(tableCopy);
}
