v8/test/cctest/test-heap-profiler.cc

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// Copyright 2009 the V8 project authors. All rights reserved.
//
// Tests for heap profiler
#ifdef ENABLE_LOGGING_AND_PROFILING
#include "v8.h"
#include "heap-profiler.h"
#include "string-stream.h"
#include "cctest.h"
#include "zone-inl.h"
namespace i = v8::internal;
using i::ClustersCoarser;
using i::JSObjectsCluster;
using i::JSObjectsRetainerTree;
using i::JSObjectsClusterTree;
using i::RetainerHeapProfile;
static void CompileAndRunScript(const char *src) {
v8::Script::Compile(v8::String::New(src))->Run();
}
namespace {
class ConstructorHeapProfileTestHelper : public i::ConstructorHeapProfile {
public:
ConstructorHeapProfileTestHelper()
: i::ConstructorHeapProfile(),
f_name_(i::Factory::NewStringFromAscii(i::CStrVector("F"))),
f_count_(0) {
}
void Call(const JSObjectsCluster& cluster,
const i::NumberAndSizeInfo& number_and_size) {
if (f_name_->Equals(cluster.constructor())) {
CHECK_EQ(f_count_, 0);
f_count_ = number_and_size.number();
CHECK_GT(f_count_, 0);
}
}
int f_count() { return f_count_; }
private:
i::Handle<i::String> f_name_;
int f_count_;
};
} // namespace
TEST(ConstructorProfile) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
CompileAndRunScript(
"function F() {} // A constructor\n"
"var f1 = new F();\n"
"var f2 = new F();\n");
ConstructorHeapProfileTestHelper cons_profile;
i::AssertNoAllocation no_alloc;
i::HeapIterator iterator;
for (i::HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next())
cons_profile.CollectStats(obj);
CHECK_EQ(0, cons_profile.f_count());
cons_profile.PrintStats();
CHECK_EQ(2, cons_profile.f_count());
}
static JSObjectsCluster AddHeapObjectToTree(JSObjectsRetainerTree* tree,
i::String* constructor,
int instance,
JSObjectsCluster* ref1 = NULL,
JSObjectsCluster* ref2 = NULL,
JSObjectsCluster* ref3 = NULL) {
JSObjectsCluster o(constructor, reinterpret_cast<i::Object*>(instance));
JSObjectsClusterTree* o_tree = new JSObjectsClusterTree();
JSObjectsClusterTree::Locator o_loc;
if (ref1 != NULL) o_tree->Insert(*ref1, &o_loc);
if (ref2 != NULL) o_tree->Insert(*ref2, &o_loc);
if (ref3 != NULL) o_tree->Insert(*ref3, &o_loc);
JSObjectsRetainerTree::Locator loc;
tree->Insert(o, &loc);
loc.set_value(o_tree);
return o;
}
static void AddSelfReferenceToTree(JSObjectsRetainerTree* tree,
JSObjectsCluster* self_ref) {
JSObjectsRetainerTree::Locator loc;
CHECK(tree->Find(*self_ref, &loc));
JSObjectsClusterTree::Locator o_loc;
CHECK_NE(NULL, loc.value());
loc.value()->Insert(*self_ref, &o_loc);
}
static inline void CheckEqualsHelper(const char* file, int line,
const char* expected_source,
const JSObjectsCluster& expected,
const char* value_source,
const JSObjectsCluster& value) {
if (JSObjectsCluster::Compare(expected, value) != 0) {
i::HeapStringAllocator allocator;
i::StringStream stream(&allocator);
stream.Add("# Expected: ");
expected.DebugPrint(&stream);
stream.Add("\n# Found: ");
value.DebugPrint(&stream);
V8_Fatal(file, line, "CHECK_EQ(%s, %s) failed\n%s",
expected_source, value_source,
*stream.ToCString());
}
}
static inline void CheckNonEqualsHelper(const char* file, int line,
const char* expected_source,
const JSObjectsCluster& expected,
const char* value_source,
const JSObjectsCluster& value) {
if (JSObjectsCluster::Compare(expected, value) == 0) {
i::HeapStringAllocator allocator;
i::StringStream stream(&allocator);
stream.Add("# !Expected: ");
expected.DebugPrint(&stream);
stream.Add("\n# Found: ");
value.DebugPrint(&stream);
V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n%s",
expected_source, value_source,
*stream.ToCString());
}
}
TEST(ClustersCoarserSimple) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
i::ZoneScope zn_scope(i::DELETE_ON_EXIT);
JSObjectsRetainerTree tree;
JSObjectsCluster function(i::Heap::function_class_symbol());
JSObjectsCluster a(*i::Factory::NewStringFromAscii(i::CStrVector("A")));
JSObjectsCluster b(*i::Factory::NewStringFromAscii(i::CStrVector("B")));
// o1 <- Function
JSObjectsCluster o1 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x100, &function);
// o2 <- Function
JSObjectsCluster o2 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x200, &function);
// o3 <- A, B
JSObjectsCluster o3 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x300, &a, &b);
// o4 <- B, A
JSObjectsCluster o4 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x400, &b, &a);
// o5 <- A, B, Function
JSObjectsCluster o5 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x500,
&a, &b, &function);
ClustersCoarser coarser;
coarser.Process(&tree);
CHECK_EQ(coarser.GetCoarseEquivalent(o1), coarser.GetCoarseEquivalent(o2));
CHECK_EQ(coarser.GetCoarseEquivalent(o3), coarser.GetCoarseEquivalent(o4));
CHECK_NE(coarser.GetCoarseEquivalent(o1), coarser.GetCoarseEquivalent(o3));
CHECK_EQ(JSObjectsCluster(), coarser.GetCoarseEquivalent(o5));
}
TEST(ClustersCoarserMultipleConstructors) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
i::ZoneScope zn_scope(i::DELETE_ON_EXIT);
JSObjectsRetainerTree tree;
JSObjectsCluster function(i::Heap::function_class_symbol());
// o1 <- Function
JSObjectsCluster o1 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x100, &function);
// a1 <- Function
JSObjectsCluster a1 =
AddHeapObjectToTree(&tree, i::Heap::Array_symbol(), 0x1000, &function);
// o2 <- Function
JSObjectsCluster o2 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x200, &function);
// a2 <- Function
JSObjectsCluster a2 =
AddHeapObjectToTree(&tree, i::Heap::Array_symbol(), 0x2000, &function);
ClustersCoarser coarser;
coarser.Process(&tree);
CHECK_EQ(coarser.GetCoarseEquivalent(o1), coarser.GetCoarseEquivalent(o2));
CHECK_EQ(coarser.GetCoarseEquivalent(a1), coarser.GetCoarseEquivalent(a2));
}
TEST(ClustersCoarserPathsTraversal) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
i::ZoneScope zn_scope(i::DELETE_ON_EXIT);
JSObjectsRetainerTree tree;
// On the following graph:
//
// p
// <- o21 <- o11 <-
// q o
// <- o22 <- o12 <-
// r
//
// we expect that coarser will deduce equivalences: p ~ q ~ r,
// o21 ~ o22, and o11 ~ o12.
JSObjectsCluster o =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x100);
JSObjectsCluster o11 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x110, &o);
JSObjectsCluster o12 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x120, &o);
JSObjectsCluster o21 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x210, &o11);
JSObjectsCluster o22 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x220, &o12);
JSObjectsCluster p =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x300, &o21);
JSObjectsCluster q =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x310, &o21, &o22);
JSObjectsCluster r =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x320, &o22);
ClustersCoarser coarser;
coarser.Process(&tree);
CHECK_EQ(JSObjectsCluster(), coarser.GetCoarseEquivalent(o));
CHECK_NE(JSObjectsCluster(), coarser.GetCoarseEquivalent(o11));
CHECK_EQ(coarser.GetCoarseEquivalent(o11), coarser.GetCoarseEquivalent(o12));
CHECK_EQ(coarser.GetCoarseEquivalent(o21), coarser.GetCoarseEquivalent(o22));
CHECK_NE(coarser.GetCoarseEquivalent(o11), coarser.GetCoarseEquivalent(o21));
CHECK_NE(JSObjectsCluster(), coarser.GetCoarseEquivalent(p));
CHECK_EQ(coarser.GetCoarseEquivalent(p), coarser.GetCoarseEquivalent(q));
CHECK_EQ(coarser.GetCoarseEquivalent(q), coarser.GetCoarseEquivalent(r));
CHECK_NE(coarser.GetCoarseEquivalent(o11), coarser.GetCoarseEquivalent(p));
CHECK_NE(coarser.GetCoarseEquivalent(o21), coarser.GetCoarseEquivalent(p));
}
TEST(ClustersCoarserSelf) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
i::ZoneScope zn_scope(i::DELETE_ON_EXIT);
JSObjectsRetainerTree tree;
// On the following graph:
//
// p (self-referencing)
// <- o1 <-
// q (self-referencing) o
// <- o2 <-
// r (self-referencing)
//
// we expect that coarser will deduce equivalences: p ~ q ~ r, o1 ~ o2;
JSObjectsCluster o =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x100);
JSObjectsCluster o1 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x110, &o);
JSObjectsCluster o2 =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x120, &o);
JSObjectsCluster p =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x300, &o1);
AddSelfReferenceToTree(&tree, &p);
JSObjectsCluster q =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x310, &o1, &o2);
AddSelfReferenceToTree(&tree, &q);
JSObjectsCluster r =
AddHeapObjectToTree(&tree, i::Heap::Object_symbol(), 0x320, &o2);
AddSelfReferenceToTree(&tree, &r);
ClustersCoarser coarser;
coarser.Process(&tree);
CHECK_EQ(JSObjectsCluster(), coarser.GetCoarseEquivalent(o));
CHECK_NE(JSObjectsCluster(), coarser.GetCoarseEquivalent(o1));
CHECK_EQ(coarser.GetCoarseEquivalent(o1), coarser.GetCoarseEquivalent(o2));
CHECK_NE(JSObjectsCluster(), coarser.GetCoarseEquivalent(p));
CHECK_EQ(coarser.GetCoarseEquivalent(p), coarser.GetCoarseEquivalent(q));
CHECK_EQ(coarser.GetCoarseEquivalent(q), coarser.GetCoarseEquivalent(r));
CHECK_NE(coarser.GetCoarseEquivalent(o1), coarser.GetCoarseEquivalent(p));
}
namespace {
class RetainerProfilePrinter : public RetainerHeapProfile::Printer {
public:
RetainerProfilePrinter() : stream_(&allocator_), lines_(100) {}
void PrintRetainers(const JSObjectsCluster& cluster,
const i::StringStream& retainers) {
cluster.Print(&stream_);
stream_.Add("%s", *(retainers.ToCString()));
stream_.Put('\0');
}
const char* GetRetainers(const char* constructor) {
FillLines();
const size_t cons_len = strlen(constructor);
for (int i = 0; i < lines_.length(); ++i) {
if (strncmp(constructor, lines_[i], cons_len) == 0 &&
lines_[i][cons_len] == ',') {
return lines_[i] + cons_len + 1;
}
}
return NULL;
}
private:
void FillLines() {
if (lines_.length() > 0) return;
stream_.Put('\0');
stream_str_ = stream_.ToCString();
const char* pos = *stream_str_;
while (pos != NULL && *pos != '\0') {
lines_.Add(pos);
pos = strchr(pos, '\0');
if (pos != NULL) ++pos;
}
}
i::HeapStringAllocator allocator_;
i::StringStream stream_;
i::SmartPointer<const char> stream_str_;
i::List<const char*> lines_;
};
} // namespace
TEST(RetainerProfile) {
v8::HandleScope scope;
v8::Handle<v8::Context> env = v8::Context::New();
env->Enter();
CompileAndRunScript(
"function A() {}\n"
"function B(x) { this.x = x; }\n"
"function C(x) { this.x1 = x; this.x2 = x; }\n"
"var a = new A();\n"
"var b1 = new B(a), b2 = new B(a);\n"
"var c = new C(a);");
RetainerHeapProfile ret_profile;
i::AssertNoAllocation no_alloc;
i::HeapIterator iterator;
for (i::HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next())
ret_profile.CollectStats(obj);
RetainerProfilePrinter printer;
ret_profile.DebugPrintStats(&printer);
const char* retainers_of_a = printer.GetRetainers("A");
// The order of retainers is unspecified, so we check string length, and
// verify each retainer separately.
CHECK_EQ(i::StrLength("(global property);1,B;2,C;2"),
i::StrLength(retainers_of_a));
CHECK(strstr(retainers_of_a, "(global property);1") != NULL);
CHECK(strstr(retainers_of_a, "B;2") != NULL);
CHECK(strstr(retainers_of_a, "C;2") != NULL);
CHECK_EQ("(global property);2", printer.GetRetainers("B"));
CHECK_EQ("(global property);1", printer.GetRetainers("C"));
}
#endif // ENABLE_LOGGING_AND_PROFILING