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deps: cherry-pick 9b21865822243 from V8 upstream
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Original commit message:

    [api] Add optional data pointer to GC callbacks

    This can be useful when there may be multiple callbacks attached by
    code that's not directly tied to a single isolate, e.g. working
    on a per-context basis.

    This also allows rephrasing the global non-isolate APIs in terms
    of this new API, rather than working around it inside `src/heap`.

    [email protected]

    Bug:
    Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
    Change-Id: I2e490ec40d1a34ea812f25f41ef9741d2116d965
    Reviewed-on: https://chromium-review.googlesource.com/647548
    Reviewed-by: Yang Guo <[email protected]>
    Reviewed-by: Adam Klein <[email protected]>
    Commit-Queue: Yang Guo <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#47923}

PR-URL: #15391
Backport-PR-URL: #16413
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
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@addaleax @gibfahn
addaleax authored and gibfahn committed Feb 18, 2018
1 parent aa4f58a commit a7fc127
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Showing 5 changed files with 162 additions and 76 deletions.
9 changes: 9 additions & 0 deletions deps/v8/include/v8.h
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Original file line number Diff line number Diff line change
Expand Up @@ -7259,6 +7259,8 @@ class V8_EXPORT Isolate {

typedef void (*GCCallback)(Isolate* isolate, GCType type,
GCCallbackFlags flags);
typedef void (*GCCallbackWithData)(Isolate* isolate, GCType type,
GCCallbackFlags flags, void* data);

/**
* Enables the host application to receive a notification before a
Expand All @@ -7269,13 +7271,16 @@ class V8_EXPORT Isolate {
* not possible to register the same callback function two times with
* different GCType filters.
*/
void AddGCPrologueCallback(GCCallbackWithData callback, void* data = nullptr,
GCType gc_type_filter = kGCTypeAll);
void AddGCPrologueCallback(GCCallback callback,
GCType gc_type_filter = kGCTypeAll);

/**
* This function removes callback which was installed by
* AddGCPrologueCallback function.
*/
void RemoveGCPrologueCallback(GCCallbackWithData, void* data = nullptr);
void RemoveGCPrologueCallback(GCCallback callback);

/**
Expand All @@ -7292,13 +7297,17 @@ class V8_EXPORT Isolate {
* not possible to register the same callback function two times with
* different GCType filters.
*/
void AddGCEpilogueCallback(GCCallbackWithData callback, void* data = nullptr,
GCType gc_type_filter = kGCTypeAll);
void AddGCEpilogueCallback(GCCallback callback,
GCType gc_type_filter = kGCTypeAll);

/**
* This function removes callback which was installed by
* AddGCEpilogueCallback function.
*/
void RemoveGCEpilogueCallback(GCCallbackWithData callback,
void* data = nullptr);
void RemoveGCEpilogueCallback(GCCallback callback);

typedef size_t (*GetExternallyAllocatedMemoryInBytesCallback)();
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65 changes: 47 additions & 18 deletions deps/v8/src/api.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -8375,41 +8375,70 @@ v8::Local<Value> Isolate::ThrowException(v8::Local<v8::Value> value) {
return v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}

void Isolate::AddGCPrologueCallback(GCCallback callback, GCType gc_type) {
void Isolate::AddGCPrologueCallback(GCCallbackWithData callback, void* data,
GCType gc_type) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
isolate->heap()->AddGCPrologueCallback(callback, gc_type);
isolate->heap()->AddGCPrologueCallback(callback, gc_type, data);
}


void Isolate::RemoveGCPrologueCallback(GCCallback callback) {
void Isolate::RemoveGCPrologueCallback(GCCallbackWithData callback,
void* data) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
isolate->heap()->RemoveGCPrologueCallback(callback);
isolate->heap()->RemoveGCPrologueCallback(callback, data);
}

void Isolate::AddGCEpilogueCallback(GCCallbackWithData callback, void* data,
GCType gc_type) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
isolate->heap()->AddGCEpilogueCallback(callback, gc_type, data);
}

void Isolate::AddGCEpilogueCallback(GCCallback callback, GCType gc_type) {
void Isolate::RemoveGCEpilogueCallback(GCCallbackWithData callback,
void* data) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
isolate->heap()->AddGCEpilogueCallback(callback, gc_type);
isolate->heap()->RemoveGCEpilogueCallback(callback, data);
}

static void CallGCCallbackWithoutData(Isolate* isolate, GCType type,
GCCallbackFlags flags, void* data) {
reinterpret_cast<Isolate::GCCallback>(data)(isolate, type, flags);
}

void Isolate::RemoveGCEpilogueCallback(GCCallback callback) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
isolate->heap()->RemoveGCEpilogueCallback(callback);
void Isolate::AddGCPrologueCallback(GCCallback callback, GCType gc_type) {
void* data = reinterpret_cast<void*>(callback);
AddGCPrologueCallback(CallGCCallbackWithoutData, data, gc_type);
}

void Isolate::RemoveGCPrologueCallback(GCCallback callback) {
void* data = reinterpret_cast<void*>(callback);
RemoveGCPrologueCallback(CallGCCallbackWithoutData, data);
}

void V8::AddGCPrologueCallback(GCCallback callback, GCType gc_type) {
i::Isolate* isolate = i::Isolate::Current();
isolate->heap()->AddGCPrologueCallback(
reinterpret_cast<v8::Isolate::GCCallback>(callback), gc_type, false);
void Isolate::AddGCEpilogueCallback(GCCallback callback, GCType gc_type) {
void* data = reinterpret_cast<void*>(callback);
AddGCEpilogueCallback(CallGCCallbackWithoutData, data, gc_type);
}

void Isolate::RemoveGCEpilogueCallback(GCCallback callback) {
void* data = reinterpret_cast<void*>(callback);
RemoveGCEpilogueCallback(CallGCCallbackWithoutData, data);
}

static void CallGCCallbackWithoutIsolate(Isolate* isolate, GCType type,
GCCallbackFlags flags, void* data) {
reinterpret_cast<v8::GCCallback>(data)(type, flags);
}

void V8::AddGCEpilogueCallback(GCCallback callback, GCType gc_type) {
i::Isolate* isolate = i::Isolate::Current();
isolate->heap()->AddGCEpilogueCallback(
reinterpret_cast<v8::Isolate::GCCallback>(callback), gc_type, false);
void V8::AddGCPrologueCallback(v8::GCCallback callback, GCType gc_type) {
void* data = reinterpret_cast<void*>(callback);
Isolate::GetCurrent()->AddGCPrologueCallback(CallGCCallbackWithoutIsolate,
data, gc_type);
}

void V8::AddGCEpilogueCallback(v8::GCCallback callback, GCType gc_type) {
void* data = reinterpret_cast<void*>(callback);
Isolate::GetCurrent()->AddGCEpilogueCallback(CallGCCallbackWithoutIsolate,
data, gc_type);
}

void Isolate::SetEmbedderHeapTracer(EmbedderHeapTracer* tracer) {
Expand Down
71 changes: 29 additions & 42 deletions deps/v8/src/heap/heap.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -58,15 +58,16 @@
namespace v8 {
namespace internal {

bool Heap::GCCallbackPair::operator==(const Heap::GCCallbackPair& other) const {
return other.callback == callback;
bool Heap::GCCallbackTuple::operator==(
const Heap::GCCallbackTuple& other) const {
return other.callback == callback && other.data == data;
}

Heap::GCCallbackPair& Heap::GCCallbackPair::operator=(
const Heap::GCCallbackPair& other) {
Heap::GCCallbackTuple& Heap::GCCallbackTuple::operator=(
const Heap::GCCallbackTuple& other) {
callback = other.callback;
gc_type = other.gc_type;
pass_isolate = other.pass_isolate;
data = other.data;
return *this;
}

Expand Down Expand Up @@ -1592,35 +1593,21 @@ bool Heap::PerformGarbageCollection(
void Heap::CallGCPrologueCallbacks(GCType gc_type, GCCallbackFlags flags) {
RuntimeCallTimerScope runtime_timer(isolate(),
&RuntimeCallStats::GCPrologueCallback);
for (const GCCallbackPair& info : gc_prologue_callbacks_) {
for (const GCCallbackTuple& info : gc_prologue_callbacks_) {
if (gc_type & info.gc_type) {
if (!info.pass_isolate) {
v8::GCCallback callback =
reinterpret_cast<v8::GCCallback>(info.callback);
callback(gc_type, flags);
} else {
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate());
info.callback(isolate, gc_type, flags);
}
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate());
info.callback(isolate, gc_type, flags, info.data);
}
}
}


void Heap::CallGCEpilogueCallbacks(GCType gc_type,
GCCallbackFlags gc_callback_flags) {
void Heap::CallGCEpilogueCallbacks(GCType gc_type, GCCallbackFlags flags) {
RuntimeCallTimerScope runtime_timer(isolate(),
&RuntimeCallStats::GCEpilogueCallback);
for (const GCCallbackPair& info : gc_epilogue_callbacks_) {
for (const GCCallbackTuple& info : gc_epilogue_callbacks_) {
if (gc_type & info.gc_type) {
if (!info.pass_isolate) {
v8::GCCallback callback =
reinterpret_cast<v8::GCCallback>(info.callback);
callback(gc_type, gc_callback_flags);
} else {
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate());
info.callback(isolate, gc_type, gc_callback_flags);
}
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(this->isolate());
info.callback(isolate, gc_type, flags, info.data);
}
}
}
Expand Down Expand Up @@ -6192,21 +6179,21 @@ void Heap::TearDown() {
memory_allocator_ = nullptr;
}


void Heap::AddGCPrologueCallback(v8::Isolate::GCCallback callback,
GCType gc_type, bool pass_isolate) {
void Heap::AddGCPrologueCallback(v8::Isolate::GCCallbackWithData callback,
GCType gc_type, void* data) {
DCHECK_NOT_NULL(callback);
DCHECK(gc_prologue_callbacks_.end() ==
std::find(gc_prologue_callbacks_.begin(), gc_prologue_callbacks_.end(),
GCCallbackPair(callback, gc_type, pass_isolate)));
gc_prologue_callbacks_.emplace_back(callback, gc_type, pass_isolate);
GCCallbackTuple(callback, gc_type, data)));
gc_prologue_callbacks_.emplace_back(callback, gc_type, data);
}


void Heap::RemoveGCPrologueCallback(v8::Isolate::GCCallback callback) {
void Heap::RemoveGCPrologueCallback(v8::Isolate::GCCallbackWithData callback,
void* data) {
DCHECK_NOT_NULL(callback);
for (size_t i = 0; i < gc_prologue_callbacks_.size(); i++) {
if (gc_prologue_callbacks_[i].callback == callback) {
if (gc_prologue_callbacks_[i].callback == callback &&
gc_prologue_callbacks_[i].data == data) {
gc_prologue_callbacks_[i] = gc_prologue_callbacks_.back();
gc_prologue_callbacks_.pop_back();
return;
Expand All @@ -6215,21 +6202,21 @@ void Heap::RemoveGCPrologueCallback(v8::Isolate::GCCallback callback) {
UNREACHABLE();
}


void Heap::AddGCEpilogueCallback(v8::Isolate::GCCallback callback,
GCType gc_type, bool pass_isolate) {
void Heap::AddGCEpilogueCallback(v8::Isolate::GCCallbackWithData callback,
GCType gc_type, void* data) {
DCHECK_NOT_NULL(callback);
DCHECK(gc_epilogue_callbacks_.end() ==
std::find(gc_epilogue_callbacks_.begin(), gc_epilogue_callbacks_.end(),
GCCallbackPair(callback, gc_type, pass_isolate)));
gc_epilogue_callbacks_.emplace_back(callback, gc_type, pass_isolate);
GCCallbackTuple(callback, gc_type, data)));
gc_epilogue_callbacks_.emplace_back(callback, gc_type, data);
}


void Heap::RemoveGCEpilogueCallback(v8::Isolate::GCCallback callback) {
void Heap::RemoveGCEpilogueCallback(v8::Isolate::GCCallbackWithData callback,
void* data) {
DCHECK_NOT_NULL(callback);
for (size_t i = 0; i < gc_epilogue_callbacks_.size(); i++) {
if (gc_epilogue_callbacks_[i].callback == callback) {
if (gc_epilogue_callbacks_[i].callback == callback &&
gc_epilogue_callbacks_[i].data == data) {
gc_epilogue_callbacks_[i] = gc_epilogue_callbacks_.back();
gc_epilogue_callbacks_.pop_back();
return;
Expand Down
34 changes: 18 additions & 16 deletions deps/v8/src/heap/heap.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1435,13 +1435,15 @@ class Heap {
// Prologue/epilogue callback methods.========================================
// ===========================================================================

void AddGCPrologueCallback(v8::Isolate::GCCallback callback,
GCType gc_type_filter, bool pass_isolate = true);
void RemoveGCPrologueCallback(v8::Isolate::GCCallback callback);
void AddGCPrologueCallback(v8::Isolate::GCCallbackWithData callback,
GCType gc_type_filter, void* data);
void RemoveGCPrologueCallback(v8::Isolate::GCCallbackWithData callback,
void* data);

void AddGCEpilogueCallback(v8::Isolate::GCCallback callback,
GCType gc_type_filter, bool pass_isolate = true);
void RemoveGCEpilogueCallback(v8::Isolate::GCCallback callback);
void AddGCEpilogueCallback(v8::Isolate::GCCallbackWithData callback,
GCType gc_type_filter, void* data);
void RemoveGCEpilogueCallback(v8::Isolate::GCCallbackWithData callback,
void* data);

void CallGCPrologueCallbacks(GCType gc_type, GCCallbackFlags flags);
void CallGCEpilogueCallbacks(GCType gc_type, GCCallbackFlags flags);
Expand Down Expand Up @@ -1612,17 +1614,17 @@ class Heap {
RootListIndex index;
};

struct GCCallbackPair {
GCCallbackPair(v8::Isolate::GCCallback callback, GCType gc_type,
bool pass_isolate)
: callback(callback), gc_type(gc_type), pass_isolate(pass_isolate) {}
struct GCCallbackTuple {
GCCallbackTuple(v8::Isolate::GCCallbackWithData callback, GCType gc_type,
void* data)
: callback(callback), gc_type(gc_type), data(data) {}

bool operator==(const GCCallbackPair& other) const;
GCCallbackPair& operator=(const GCCallbackPair& other);
bool operator==(const GCCallbackTuple& other) const;
GCCallbackTuple& operator=(const GCCallbackTuple& other);

v8::Isolate::GCCallback callback;
v8::Isolate::GCCallbackWithData callback;
GCType gc_type;
bool pass_isolate;
void* data;
};

static const int kInitialStringTableSize = 2048;
Expand Down Expand Up @@ -2302,8 +2304,8 @@ class Heap {
// contains Smi(0) while marking is not active.
Object* encountered_weak_collections_;

std::vector<GCCallbackPair> gc_epilogue_callbacks_;
std::vector<GCCallbackPair> gc_prologue_callbacks_;
std::vector<GCCallbackTuple> gc_epilogue_callbacks_;
std::vector<GCCallbackTuple> gc_prologue_callbacks_;

GetExternallyAllocatedMemoryInBytesCallback external_memory_callback_;

Expand Down
59 changes: 59 additions & 0 deletions deps/v8/test/cctest/test-api.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -19686,6 +19686,19 @@ void EpilogueCallbackSecond(v8::Isolate* isolate,
++epilogue_call_count_second;
}

void PrologueCallbackNew(v8::Isolate* isolate, v8::GCType,
v8::GCCallbackFlags flags, void* data) {
CHECK_EQ(flags, v8::kNoGCCallbackFlags);
CHECK_EQ(gc_callbacks_isolate, isolate);
++*static_cast<int*>(data);
}

void EpilogueCallbackNew(v8::Isolate* isolate, v8::GCType,
v8::GCCallbackFlags flags, void* data) {
CHECK_EQ(flags, v8::kNoGCCallbackFlags);
CHECK_EQ(gc_callbacks_isolate, isolate);
++*static_cast<int*>(data);
}

void PrologueCallbackAlloc(v8::Isolate* isolate,
v8::GCType,
Expand Down Expand Up @@ -19760,6 +19773,52 @@ TEST(GCCallbacksOld) {
CHECK_EQ(2, epilogue_call_count_second);
}

TEST(GCCallbacksWithData) {
LocalContext context;

gc_callbacks_isolate = context->GetIsolate();
int prologue1 = 0;
int epilogue1 = 0;
int prologue2 = 0;
int epilogue2 = 0;

context->GetIsolate()->AddGCPrologueCallback(PrologueCallbackNew, &prologue1);
context->GetIsolate()->AddGCEpilogueCallback(EpilogueCallbackNew, &epilogue1);
CHECK_EQ(0, prologue1);
CHECK_EQ(0, epilogue1);
CHECK_EQ(0, prologue2);
CHECK_EQ(0, epilogue2);
CcTest::CollectAllGarbage();
CHECK_EQ(1, prologue1);
CHECK_EQ(1, epilogue1);
CHECK_EQ(0, prologue2);
CHECK_EQ(0, epilogue2);
context->GetIsolate()->AddGCPrologueCallback(PrologueCallbackNew, &prologue2);
context->GetIsolate()->AddGCEpilogueCallback(EpilogueCallbackNew, &epilogue2);
CcTest::CollectAllGarbage();
CHECK_EQ(2, prologue1);
CHECK_EQ(2, epilogue1);
CHECK_EQ(1, prologue2);
CHECK_EQ(1, epilogue2);
context->GetIsolate()->RemoveGCPrologueCallback(PrologueCallbackNew,
&prologue1);
context->GetIsolate()->RemoveGCEpilogueCallback(EpilogueCallbackNew,
&epilogue1);
CcTest::CollectAllGarbage();
CHECK_EQ(2, prologue1);
CHECK_EQ(2, epilogue1);
CHECK_EQ(2, prologue2);
CHECK_EQ(2, epilogue2);
context->GetIsolate()->RemoveGCPrologueCallback(PrologueCallbackNew,
&prologue2);
context->GetIsolate()->RemoveGCEpilogueCallback(EpilogueCallbackNew,
&epilogue2);
CcTest::CollectAllGarbage();
CHECK_EQ(2, prologue1);
CHECK_EQ(2, epilogue1);
CHECK_EQ(2, prologue2);
CHECK_EQ(2, epilogue2);
}

TEST(GCCallbacks) {
LocalContext context;
Expand Down

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