blob: ab31ddbd17bb4fab48864b1f1b3531b444339f35 [file] [log] [blame]
// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "logging.h"
#include <stdio.h>
#include <zircon/assert.h>
#include <memory>
#include <ddk/debug.h>
#include <fbl/string_printf.h>
namespace sysmem_driver {
void vLog(bool is_error, const char* prefix1, const char* prefix2, const char* format,
va_list args) {
// Let's not have a buffer on the stack, not because it couldn't be done
// safely, but because we'd potentially run into stack size vs. message
// length tradeoffs, stack expansion granularity fun, or whatever else.
va_list args2;
va_copy(args2, args);
size_t buffer_bytes = vsnprintf(nullptr, 0, format, args) + 1;
std::unique_ptr<char[]> buffer(new char[buffer_bytes]);
size_t buffer_bytes_2 = vsnprintf(buffer.get(), buffer_bytes, format, args2) + 1;
// sanity check; should match so go ahead and assert that it does.
ZX_DEBUG_ASSERT(buffer_bytes == buffer_bytes_2);
if (is_error) {
zxlogf(ERROR, "[%s %s] %s", prefix1, prefix2, buffer.get());
} else {
zxlogf(DEBUG, "[%s %s] %s", prefix1, prefix2, buffer.get());
static std::atomic_uint64_t name_counter;
std::string CreateUniqueName(const char* prefix) {
uint64_t new_value = name_counter++;
return std::string(fbl::StringPrintf("%s%ld", prefix, new_value).c_str());
} // namespace sysmem_driver