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src: fix DTrace GC callbacks DCHECKs and add cleanup #26742

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src: fix DTrace GC callbacks DCHECKs and add cleanup #26742

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24 changes: 18 additions & 6 deletions src/node_dtrace.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -248,15 +248,19 @@ void DTRACE_HTTP_CLIENT_RESPONSE(const FunctionCallbackInfo<Value>& args) {
NODE_HTTP_CLIENT_RESPONSE(&conn, conn.remote, conn.port, conn.fd);
}


void dtrace_gc_start(Isolate* isolate, GCType type, GCCallbackFlags flags) {
void dtrace_gc_start(Isolate* isolate,
GCType type,
GCCallbackFlags flags,
void* data) {
// Previous versions of this probe point only logged type and flags.
// That's why for reasons of backwards compatibility the isolate goes last.
NODE_GC_START(type, flags, isolate);
}


void dtrace_gc_done(Isolate* isolate, GCType type, GCCallbackFlags flags) {
void dtrace_gc_done(Isolate* isolate,
GCType type,
GCCallbackFlags flags,
void* data) {
// Previous versions of this probe point only logged type and flags.
// That's why for reasons of backwards compatibility the isolate goes last.
NODE_GC_DONE(type, flags, isolate);
Expand All @@ -272,8 +276,16 @@ void InitDTrace(Environment* env) {
}
#endif

env->isolate()->AddGCPrologueCallback(dtrace_gc_start);
env->isolate()->AddGCEpilogueCallback(dtrace_gc_done);
// We need to use the variant of GC callbacks that takes data to
// avoid running into DCHECKs when multiple Environments try to add
// the same callback to the same isolate multiple times.
env->isolate()->AddGCPrologueCallback(dtrace_gc_start, env);
env->isolate()->AddGCEpilogueCallback(dtrace_gc_done, env);
env->AddCleanupHook([](void* data) {
Environment* env = static_cast<Environment*>(data);
env->isolate()->RemoveGCPrologueCallback(dtrace_gc_start, env);
env->isolate()->RemoveGCEpilogueCallback(dtrace_gc_done, env);
}, env);
}

void InitializeDTrace(Local<Object> target,
Expand Down