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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "util.h" // NOLINT(build/include_inline)
#include "util-inl.h"
#include "debug_utils-inl.h"
#include "env-inl.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "node_internals.h"
#include "string_bytes.h"
#include "uv.h"
#ifdef _WIN32
#include <io.h> // _S_IREAD _S_IWRITE
#include <time.h>
#ifndef S_IRUSR
#define S_IRUSR _S_IREAD
#endif // S_IRUSR
#ifndef S_IWUSR
#define S_IWUSR _S_IWRITE
#endif // S_IWUSR
#else
#include <sys/time.h>
#include <sys/types.h>
#endif
#include <atomic>
#include <cstdio>
#include <cstring>
#include <iomanip>
#include <sstream>
static std::atomic_int seq = {0}; // Sequence number for diagnostic filenames.
namespace node {
using v8::ArrayBufferView;
using v8::Isolate;
using v8::Local;
using v8::String;
using v8::Value;
template <typename T>
static void MakeUtf8String(Isolate* isolate,
Local<Value> value,
MaybeStackBuffer<T>* target) {
Local<String> string;
if (!value->ToString(isolate->GetCurrentContext()).ToLocal(&string)) return;
size_t storage;
if (!StringBytes::StorageSize(isolate, string, UTF8).To(&storage)) return;
storage += 1;
target->AllocateSufficientStorage(storage);
const int flags =
String::NO_NULL_TERMINATION | String::REPLACE_INVALID_UTF8;
const int length =
string->WriteUtf8(isolate, target->out(), storage, nullptr, flags);
target->SetLengthAndZeroTerminate(length);
}
Utf8Value::Utf8Value(Isolate* isolate, Local<Value> value) {
if (value.IsEmpty())
return;
MakeUtf8String(isolate, value, this);
}
TwoByteValue::TwoByteValue(Isolate* isolate, Local<Value> value) {
if (value.IsEmpty()) {
return;
}
Local<String> string;
if (!value->ToString(isolate->GetCurrentContext()).ToLocal(&string)) return;
// Allocate enough space to include the null terminator
const size_t storage = string->Length() + 1;
AllocateSufficientStorage(storage);
const int flags = String::NO_NULL_TERMINATION;
const int length = string->Write(isolate, out(), 0, storage, flags);
SetLengthAndZeroTerminate(length);
}
BufferValue::BufferValue(Isolate* isolate, Local<Value> value) {
// Slightly different take on Utf8Value. If value is a String,
// it will return a Utf8 encoded string. If value is a Buffer,
// it will copy the data out of the Buffer as is.
if (value.IsEmpty()) {
// Dereferencing this object will return nullptr.
Invalidate();
return;
}
if (value->IsString()) {
MakeUtf8String(isolate, value, this);
} else if (value->IsArrayBufferView()) {
const size_t len = value.As<ArrayBufferView>()->ByteLength();
// Leave place for the terminating '\0' byte.
AllocateSufficientStorage(len + 1);
value.As<ArrayBufferView>()->CopyContents(out(), len);
SetLengthAndZeroTerminate(len);
} else {
Invalidate();
}
}
void LowMemoryNotification() {
if (per_process::v8_initialized) {
auto isolate = Isolate::TryGetCurrent();
if (isolate != nullptr) {
isolate->LowMemoryNotification();
}
}
}
std::string GetProcessTitle(const char* default_title) {
std::string buf(16, '\0');
for (;;) {
const int rc = uv_get_process_title(&buf[0], buf.size());
if (rc == 0)
break;
// If uv_setup_args() was not called, `uv_get_process_title()` will always
// return `UV_ENOBUFS`, no matter the input size. Guard against a possible
// infinite loop by limiting the buffer size.
if (rc != UV_ENOBUFS || buf.size() >= 1024 * 1024)
return default_title;
buf.resize(2 * buf.size());
}
// Strip excess trailing nul bytes. Using strlen() here is safe,
// uv_get_process_title() always zero-terminates the result.
buf.resize(strlen(&buf[0]));
return buf;
}
std::string GetHumanReadableProcessName() {
return SPrintF("%s[%d]", GetProcessTitle("Node.js"), uv_os_getpid());
}
std::vector<std::string> SplitString(const std::string& in, char delim) {
std::vector<std::string> out;
if (in.empty())
return out;
std::istringstream in_stream(in);
while (in_stream.good()) {
std::string item;
std::getline(in_stream, item, delim);
if (item.empty()) continue;
out.emplace_back(std::move(item));
}
return out;
}
void ThrowErrStringTooLong(Isolate* isolate) {
isolate->ThrowException(ERR_STRING_TOO_LONG(isolate));
}
double GetCurrentTimeInMicroseconds() {
constexpr double kMicrosecondsPerSecond = 1e6;
uv_timeval64_t tv;
CHECK_EQ(0, uv_gettimeofday(&tv));
return kMicrosecondsPerSecond * tv.tv_sec + tv.tv_usec;
}
int WriteFileSync(const char* path, uv_buf_t buf) {
uv_fs_t req;
int fd = uv_fs_open(nullptr,
&req,
path,
O_WRONLY | O_CREAT | O_TRUNC,
S_IWUSR | S_IRUSR,
nullptr);
uv_fs_req_cleanup(&req);
if (fd < 0) {
return fd;
}
int err = uv_fs_write(nullptr, &req, fd, &buf, 1, 0, nullptr);
uv_fs_req_cleanup(&req);
if (err < 0) {
return err;
}
err = uv_fs_close(nullptr, &req, fd, nullptr);
uv_fs_req_cleanup(&req);
return err;
}
int WriteFileSync(v8::Isolate* isolate,
const char* path,
v8::Local<v8::String> string) {
node::Utf8Value utf8(isolate, string);
uv_buf_t buf = uv_buf_init(utf8.out(), utf8.length());
return WriteFileSync(path, buf);
}
int ReadFileSync(std::string* result, const char* path) {
uv_fs_t req;
auto defer_req_cleanup = OnScopeLeave([&req]() {
uv_fs_req_cleanup(&req);
});
uv_file file = uv_fs_open(nullptr, &req, path, O_RDONLY, 0, nullptr);
if (req.result < 0) {
// req will be cleaned up by scope leave.
return req.result;
}
uv_fs_req_cleanup(&req);
auto defer_close = OnScopeLeave([file]() {
uv_fs_t close_req;
CHECK_EQ(0, uv_fs_close(nullptr, &close_req, file, nullptr));
uv_fs_req_cleanup(&close_req);
});
*result = std::string("");
char buffer[4096];
uv_buf_t buf = uv_buf_init(buffer, sizeof(buffer));
while (true) {
const int r =
uv_fs_read(nullptr, &req, file, &buf, 1, result->length(), nullptr);
if (req.result < 0) {
// req will be cleaned up by scope leave.
return req.result;
}
uv_fs_req_cleanup(&req);
if (r <= 0) {
break;
}
result->append(buf.base, r);
}
return 0;
}
void DiagnosticFilename::LocalTime(TIME_TYPE* tm_struct) {
#ifdef _WIN32
GetLocalTime(tm_struct);
#else // UNIX, OSX
struct timeval time_val;
gettimeofday(&time_val, nullptr);
localtime_r(&time_val.tv_sec, tm_struct);
#endif
}
// Defined in node_internals.h
std::string DiagnosticFilename::MakeFilename(
uint64_t thread_id,
const char* prefix,
const char* ext) {
std::ostringstream oss;
TIME_TYPE tm_struct;
LocalTime(&tm_struct);
oss << prefix;
#ifdef _WIN32
oss << "." << std::setfill('0') << std::setw(4) << tm_struct.wYear;
oss << std::setfill('0') << std::setw(2) << tm_struct.wMonth;
oss << std::setfill('0') << std::setw(2) << tm_struct.wDay;
oss << "." << std::setfill('0') << std::setw(2) << tm_struct.wHour;
oss << std::setfill('0') << std::setw(2) << tm_struct.wMinute;
oss << std::setfill('0') << std::setw(2) << tm_struct.wSecond;
#else // UNIX, OSX
oss << "."
<< std::setfill('0')
<< std::setw(4)
<< tm_struct.tm_year + 1900;
oss << std::setfill('0')
<< std::setw(2)
<< tm_struct.tm_mon + 1;
oss << std::setfill('0')
<< std::setw(2)
<< tm_struct.tm_mday;
oss << "."
<< std::setfill('0')
<< std::setw(2)
<< tm_struct.tm_hour;
oss << std::setfill('0')
<< std::setw(2)
<< tm_struct.tm_min;
oss << std::setfill('0')
<< std::setw(2)
<< tm_struct.tm_sec;
#endif
oss << "." << uv_os_getpid();
oss << "." << thread_id;
oss << "." << std::setfill('0') << std::setw(3) << ++seq;
oss << "." << ext;
return oss.str();
}
} // namespace node
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