php-ebpf/table.cpp

#include "table.h"

//BaseTable::BaseTable(ebpf::BPF *bpf_instance, const std::string &tb_name)
//: bpf(bpf_instance), tb_name(tb_name){}

void BaseTable::printName() {
	std::cout << "Table name: " << tb_name << std::endl;
}

std::string cb_fn;

void PerfEventArrayTable::callbackfn(void *cookie, void *data, int data_size) {
	Php::Value phpData((const char *) data, data_size);
	Php::call(cb_fn.c_str(), nullptr, phpData, data_size);
}

void PerfEventArrayTable::php_open_perf_buffer(Php::Parameters &params) {
	cb_fn = params[0].stringValue();
	auto res = this->bpf->open_perf_buffer(this->tb_name, &PerfEventArrayTable::callbackfn);
	if (!res.ok()) {
		throw Php::Exception("open_perf_buffer error:" + res.msg());
	}
}

int PerfEventArrayTable::perf_buffer_poll(int timeout_ms) {
	return bpf->poll_perf_buffer(this->tb_name, timeout_ms); // perf_reader_event_read
}

Php::Value ArrayTable::php_get_value(Php::Parameters &param) {
	auto index = param[0].numericValue();
	// todo val type
	uint64_t val;
	auto table = bpf->get_array_table<uint64_t>(tb_name);
	auto res = table.get_value(index, val);
	if (!res.ok()) {
		throw Php::Exception("Get value error in" + std::string(tb_name));
	}
	Php::Value phpValue = static_cast<int64_t>(val);
	return phpValue;
}

Php::Value StackTraceTable::php_get_values(Php::Parameters &param) {
	auto stack_id = param[0].numericValue();
	auto pid = param[1].numericValue();
	auto table = bpf->get_stack_table(tb_name);

	auto symbols = table.get_stack_symbol((int) stack_id, (int) pid);
	std::vector<std::string> result;
	for (const auto &str: symbols) {
		result.push_back(Php::Value(str));
	}
	return Php::Array(result);
}

Php::Value HashTable::php_get_values() {
	Php::Array result;
	auto table = bpf->get_hash_table<uint64_t, uint64_t>(tb_name);
	auto entries = table.get_table_offline();
	for (const auto &[key, value]: entries) {
		result[key] = Php::Value(static_cast<int64_t>(value));
	}

	return result;
}

Php::Value PerCpuArrayTable::php_sum_value(Php::Parameters &param) {
	auto index = param[0].numericValue();
	std::vector<unsigned long> val;
	auto table = bpf->get_percpu_array_table<uint64_t>(tb_name);
	auto res = table.get_value(index, val);
	if (!res.ok()) {
		throw Php::Exception("Get value error in" + std::string(tb_name));
	}
	unsigned long long sum = 0;
	for (const auto &v: val) {
		sum += v;
	}
	Php::Value phpValue = static_cast<int64_t>(sum);
	return phpValue;
}