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node_report.cc
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node_report.cc
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#include "node_report.h"
#include "v8.h"
#include "uv.h"
#include <fcntl.h>
#include <string.h>
#include <fstream>
#if !defined(_MSC_VER)
#include <strings.h>
#endif
#ifdef _WIN32
#include <Windows.h>
#include <process.h>
#include <dbghelp.h>
#include <Lm.h>
#include <tchar.h>
#include <psapi.h>
#else
#include <sys/resource.h>
// Get the standard printf format macros for C99 stdint types.
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <cxxabi.h>
#include <dlfcn.h>
#if defined(__linux__) || defined(__sun)
#include <link.h>
#endif
#ifdef _AIX
#include <sys/ldr.h> // ld_info structure
#endif
// Include execinfo.h for the native backtrace API. The API is unavailable on AIX
// and on some Linux distributions, e.g. Alpine Linux.
#if !defined(_AIX) && !(defined(__linux__) && !defined(__GLIBC__))
#include <execinfo.h>
#endif
#include <sys/utsname.h>
#endif
#ifdef __APPLE__
#include <mach-o/dyld.h> // _dyld_get_image_name()
#endif
#ifndef _WIN32
extern char** environ;
#endif
namespace nodereport {
using v8::HeapSpaceStatistics;
using v8::HeapStatistics;
using v8::Isolate;
using v8::Local;
using v8::Message;
using v8::String;
using v8::V8;
// Internal/static function declarations
static void WriteNodeReport(Isolate* isolate, DumpEvent event, const char* message, const char* location, char* filename, std::ostream &out, MaybeLocal<Value> error, TIME_TYPE* time);
static void PrintCommandLine(std::ostream& out);
static void PrintVersionInformation(std::ostream& out);
static void PrintJavaScriptStack(std::ostream& out, Isolate* isolate, DumpEvent event, const char* location);
static void PrintJavaScriptErrorStack(std::ostream& out, Isolate* isolate, MaybeLocal<Value> error);
static void PrintStackFromStackTrace(std::ostream& out, Isolate* isolate, DumpEvent event);
static void PrintStackFrame(std::ostream& out, Isolate* isolate, Local<StackFrame> frame, int index, void* pc);
static void PrintNativeStack(std::ostream& out);
#ifndef _WIN32
static void PrintResourceUsage(std::ostream& out);
#endif
static void PrintGCStatistics(std::ostream& out, Isolate* isolate);
static void PrintSystemInformation(std::ostream& out, Isolate* isolate);
static void PrintLoadedLibraries(std::ostream& out, Isolate* isolate);
// Global variables
static int seq = 0; // sequence number for report filenames
const char* v8_states[] = {"JS", "GC", "COMPILER", "OTHER", "EXTERNAL", "IDLE"};
static bool report_active = false; // recursion protection
char report_filename[NR_MAXNAME + 1] = "";
char report_directory[NR_MAXPATH + 1] = ""; // defaults to current working directory
std::string version_string = UNKNOWN_NODEVERSION_STRING;
std::string commandline_string = "";
TIME_TYPE loadtime_tm_struct; // module load time
time_t load_time; // module load time absolute
/*******************************************************************************
* External function to trigger a node report, writing to file.
*
* The 'name' parameter is in/out: an input filename is used if supplied, and
* the actual filename is returned.
******************************************************************************/
void TriggerNodeReport(Isolate* isolate, DumpEvent event, const char* message, const char* location, char* name, MaybeLocal<Value> error) {
// Recursion check for report in progress, bail out
if (report_active) return;
report_active = true;
// Obtain the current time and the pid (platform dependent)
TIME_TYPE tm_struct;
#ifdef _WIN32
GetLocalTime(&tm_struct);
DWORD pid = GetCurrentProcessId();
#else // UNIX, OSX
struct timeval time_val;
gettimeofday(&time_val, nullptr);
localtime_r(&time_val.tv_sec, &tm_struct);
pid_t pid = getpid();
#endif
// Determine the required report filename. In order of priority:
// 1) supplied on API 2) configured on startup 3) default generated
char filename[NR_MAXNAME + 1] = "";
if (name != nullptr && strlen(name) > 0) {
// Filename was specified as API parameter, use that
snprintf(filename, sizeof(filename), "%s", name);
} else if (strlen(report_filename) > 0) {
// File name was supplied via start-up option, use that
snprintf(filename, sizeof(filename), "%s", report_filename);
} else {
// Construct the report filename, with timestamp, pid and sequence number
snprintf(filename, sizeof(filename), "%s", "node-report");
seq++;
#ifdef _WIN32
snprintf(&filename[strlen(filename)], sizeof(filename) - strlen(filename),
".%4d%02d%02d.%02d%02d%02d.%d.%03d.txt",
tm_struct.wYear, tm_struct.wMonth, tm_struct.wDay,
tm_struct.wHour, tm_struct.wMinute, tm_struct.wSecond,
pid, seq);
#else // UNIX, OSX
snprintf(&filename[strlen(filename)], sizeof(filename) - strlen(filename),
".%4d%02d%02d.%02d%02d%02d.%d.%03d.txt",
tm_struct.tm_year+1900, tm_struct.tm_mon+1, tm_struct.tm_mday,
tm_struct.tm_hour, tm_struct.tm_min, tm_struct.tm_sec,
pid, seq);
#endif
}
// Open the report file stream for writing. Supports stdout/err, user-specified or (default) generated name
std::ofstream outfile;
std::ostream* outstream = &std::cout;
if (!strncmp(filename, "stdout", sizeof("stdout") - 1)) {
outstream = &std::cout;
} else if (!strncmp(filename, "stderr", sizeof("stderr") - 1)) {
outstream = &std::cerr;
} else {
// Regular file. Append filename to directory path if one was specified
if (strlen(report_directory) > 0) {
char pathname[NR_MAXPATH + NR_MAXNAME + 1] = "";
#ifdef _WIN32
snprintf(pathname, sizeof(pathname), "%s%s%s", report_directory, "\\", filename);
#else
snprintf(pathname, sizeof(pathname), "%s%s%s", report_directory, "/", filename);
#endif
outfile.open(pathname, std::ios::out);
} else {
outfile.open(filename, std::ios::out);
}
// Check for errors on the file open
if (!outfile.is_open()) {
if (strlen(report_directory) > 0) {
std::cerr << "\nFailed to open Node.js report file: " << filename << " directory: " << report_directory << " (errno: " << errno << ")\n";
} else {
std::cerr << "\nFailed to open Node.js report file: " << filename << " (errno: " << errno << ")\n";
}
return;
} else {
std::cerr << "\nWriting Node.js report to file: " << filename << "\n";
}
}
// Pass our stream about by reference, not by copying it.
std::ostream &out = outfile.is_open() ? outfile : *outstream;
WriteNodeReport(isolate, event, message, location, filename, out, error, &tm_struct);
// Do not close stdout/stderr, only close files we opened.
if(outfile.is_open()) {
outfile.close();
}
std::cerr << "Node.js report completed\n";
if (name != nullptr) {
snprintf(name, NR_MAXNAME + 1, "%s", filename); // return the report file name
}
}
/*******************************************************************************
* External function to trigger a node report, writing to a supplied stream.
*
*******************************************************************************/
void GetNodeReport(Isolate* isolate, DumpEvent event, const char* message, const char* location, MaybeLocal<Value> error, std::ostream& out) {
// Obtain the current time and the pid (platform dependent)
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
WriteNodeReport(isolate, event, message, location, nullptr, out, error, &tm_struct);
}
/*******************************************************************************
* Internal function to coordinate and write the various sections of the node
* report to the supplied stream
*******************************************************************************/
static void WriteNodeReport(Isolate* isolate, DumpEvent event, const char* message, const char* location, char* filename, std::ostream &out, MaybeLocal<Value> error, TIME_TYPE* tm_struct) {
#ifdef _WIN32
DWORD pid = GetCurrentProcessId();
#else // UNIX, OSX
pid_t pid = getpid();
#endif
// Save formatting for output stream.
std::ios oldState(nullptr);
oldState.copyfmt(out);
// File stream opened OK, now start printing the report content, starting with the title
// and header information (event, filename, timestamp and pid)
out << "================================================================================\n";
out << "==== Node Report ===============================================================\n";
out << "\nEvent: " << message << ", location: \"" << location << "\"\n";
if( filename != nullptr ) {
out << "Filename: " << filename << "\n";
}
// Print dump event and module load date/time stamps
char timebuf[64];
#ifdef _WIN32
snprintf(timebuf, sizeof(timebuf), "%4d/%02d/%02d %02d:%02d:%02d",
tm_struct->wYear, tm_struct->wMonth, tm_struct->wDay,
tm_struct->wHour, tm_struct->wMinute, tm_struct->wSecond);
out << "Dump event time: "<< timebuf << "\n";
snprintf(timebuf, sizeof(timebuf), "%4d/%02d/%02d %02d:%02d:%02d",
loadtime_tm_struct.wYear, loadtime_tm_struct.wMonth, loadtime_tm_struct.wDay,
loadtime_tm_struct.wHour, loadtime_tm_struct.wMinute, loadtime_tm_struct.wSecond);
out << "Module load time: " << timebuf << "\n";
#else // UNIX, OSX
snprintf(timebuf, sizeof(timebuf), "%4d/%02d/%02d %02d:%02d:%02d",
tm_struct->tm_year+1900, tm_struct->tm_mon+1, tm_struct->tm_mday,
tm_struct->tm_hour, tm_struct->tm_min, tm_struct->tm_sec);
out << "Dump event time: "<< timebuf << "\n";
snprintf(timebuf, sizeof(timebuf), "%4d/%02d/%02d %02d:%02d:%02d",
loadtime_tm_struct.tm_year+1900, loadtime_tm_struct.tm_mon+1, loadtime_tm_struct.tm_mday,
loadtime_tm_struct.tm_hour, loadtime_tm_struct.tm_min, loadtime_tm_struct.tm_sec);
out << "Module load time: " << timebuf << "\n";
#endif
// Print native process ID
out << "Process ID: " << pid << std::endl;
// Print out the command line.
PrintCommandLine(out);
out << std::flush;
// Print Node.js and OS version information
PrintVersionInformation(out);
out << std::flush;
// Print summary JavaScript stack backtrace
PrintJavaScriptStack(out, isolate, event, location);
out << std::flush;
// Print native stack backtrace
PrintNativeStack(out);
out << std::flush;
// Print the stack trace and message from the Error object.
// (If one was provided.)
PrintJavaScriptErrorStack(out, isolate, error);
out << std::flush;
// Print V8 Heap and Garbage Collector information
PrintGCStatistics(out, isolate);
out << std::flush;
// Print OS and current thread resource usage
#ifndef _WIN32
PrintResourceUsage(out);
out << std::flush;
#endif
// Print libuv handle summary
out << "\n================================================================================";
out << "\n==== Node.js libuv Handle Summary ==============================================\n";
out << "\n(Flags: R=Ref, A=Active)\n";
out << std::left << std::setw(7) << "Flags" << std::setw(10) << "Type"
<< std::setw(4 + 2 * sizeof(void*)) << "Address" << "Details"
<< std::endl;
uv_walk(uv_default_loop(), walkHandle, (void*)&out);
// Print operating system information
PrintSystemInformation(out, isolate);
out << "\n================================================================================\n";
out << std::flush;
// Restore output stream formatting.
out.copyfmt(oldState);
report_active = false;
}
/*******************************************************************************
* Function to print process command line.
*
******************************************************************************/
static void PrintCommandLine(std::ostream& out) {
if (commandline_string != "") {
out << "Command line: " << commandline_string << "\n";
}
}
/*******************************************************************************
* Function to print Node.js version, OS version and machine information
*
******************************************************************************/
static void PrintVersionInformation(std::ostream& out) {
// Print Node.js and deps component versions
out << "\n" << version_string;
// Print node-report module version
// e.g. node-report version: 1.0.6 (built against Node.js v6.9.1)
out << std::endl << "node-report version: " << NODEREPORT_VERSION
<< " (built against Node.js v" << NODE_VERSION_STRING;
#if defined(__GLIBC__)
out << ", glibc " << __GLIBC__ << "." << __GLIBC_MINOR__;
#endif
// Print Process word size
out << ", " << sizeof(void *) * 8 << " bit" << ")" << std::endl;
// Print operating system and machine information (Windows)
#ifdef _WIN32
{
const DWORD level = 101;
LPSERVER_INFO_101 os_info = NULL;
NET_API_STATUS nStatus = NetServerGetInfo(NULL, level, (LPBYTE *)&os_info);
if (nStatus == NERR_Success) {
LPSTR os_name = "Windows";
const DWORD major = os_info->sv101_version_major & MAJOR_VERSION_MASK;
const DWORD type = os_info->sv101_type;
const bool isServer = (type & SV_TYPE_DOMAIN_CTRL) ||
(type & SV_TYPE_DOMAIN_BAKCTRL) ||
(type & SV_TYPE_SERVER_NT);
switch (major) {
case 5:
switch (os_info->sv101_version_minor) {
case 0:
os_name = "Windows 2000";
break;
default:
os_name = (isServer ? "Windows Server 2003" : "Windows XP");
}
break;
case 6:
switch (os_info->sv101_version_minor) {
case 0:
os_name = (isServer ? "Windows Server 2008" : "Windows Vista");
break;
case 1:
os_name = (isServer ? "Windows Server 2008 R2" : "Windows 7");
break;
case 2:
os_name = (isServer ? "Windows Server 2012" : "Windows 8");
break;
case 3:
os_name = (isServer ? "Windows Server 2012 R2" : "Windows 8.1");
break;
default:
os_name = (isServer ? "Windows Server" : "Windows Client");
}
break;
case 10:
os_name = (isServer ? "Windows Server 2016" : "Windows 10");
break;
default:
os_name = (isServer ? "Windows Server" : "Windows Client");
}
out << "\nOS version: " << os_name << "\n";
// Convert and print the machine name and comment fields (these are LPWSTR types)
size_t count;
char name_buf[256];
wcstombs_s(&count, name_buf, sizeof(name_buf), os_info->sv101_name, _TRUNCATE);
if (os_info->sv101_comment != NULL) {
char comment_buf[256];
wcstombs_s(&count, comment_buf, sizeof(comment_buf), os_info->sv101_comment, _TRUNCATE);
out << "\nMachine: " << name_buf << " " << comment_buf << "\n";
} else {
out << "\nMachine: " << name_buf << "\n";
}
if (os_info != NULL) {
NetApiBufferFree(os_info);
}
} else {
// NetServerGetInfo() call failed, fallback to use GetComputerName() instead
TCHAR machine_name[256];
DWORD machine_name_size = 256;
out << "\nOS version: Windows\n";
if (GetComputerName(machine_name, &machine_name_size)) {
out << "\nMachine: " << machine_name << "\n";
}
}
}
#else
// Print operating system and machine information (Unix/OSX)
struct utsname os_info;
if (uname(&os_info) >= 0) {
#if defined(_AIX)
out << "\nOS version: " << os_info.sysname << " " << os_info.version << "."
<< os_info.release << "\n";
#else
out << "\nOS version: " << os_info.sysname << " " << os_info.release << " "
<< os_info.version << "\n";
#endif
const char *(*libc_version)();
*(void**)(&libc_version) = dlsym(RTLD_DEFAULT, "gnu_get_libc_version");
if (libc_version != NULL) {
out << "(glibc: " << (*libc_version)() << ")" << std::endl;
}
out << "\nMachine: " << os_info.nodename << " " << os_info.machine << "\n";
}
#endif
}
/*******************************************************************************
* Function to print the JavaScript stack, if available
*
******************************************************************************/
static void PrintJavaScriptStack(std::ostream& out, Isolate* isolate, DumpEvent event, const char* location) {
out << "\n================================================================================";
out << "\n==== JavaScript Stack Trace ====================================================\n\n";
#ifdef _WIN32
switch (event) {
case kFatalError:
// Stack trace on fatal error not supported on Windows
out << "No stack trace available\n";
break;
default:
// All other events, print the stack using StackTrace::StackTrace() and GetStackSample() APIs
PrintStackFromStackTrace(out, isolate, event);
break;
} // end switch(event)
#else // Unix, OSX
switch (event) {
case kException:
case kJavaScript: {
// Print the stack using Message::PrintCurrentStackTrace() API
std::FILE *stack_fp = std::tmpfile();
if (stack_fp != nullptr) {
char stack_buf[64];
Message::PrintCurrentStackTrace(isolate, stack_fp);
std::fflush(stack_fp);
std::rewind(stack_fp);
while (std::fgets(stack_buf, sizeof(stack_buf), stack_fp) != nullptr) {
out << stack_buf;
}
// Calling close on a file from tmpfile *should* delete it.
std::fclose(stack_fp);
} else {
out << "No stack trace available, unable to create temporary file\n";
}
break;
}
case kFatalError:
out << "No stack trace available\n";
break;
case kSignal_JS:
case kSignal_UV:
// Print the stack using StackTrace::StackTrace() and GetStackSample() APIs
PrintStackFromStackTrace(out, isolate, event);
break;
} // end switch(event)
#endif
}
/*******************************************************************************
* Function to print a JavaScript stack from an error object
*
******************************************************************************/
static void PrintJavaScriptErrorStack(std::ostream& out, Isolate* isolate, MaybeLocal<Value> error) {
if (error.IsEmpty() || !error.ToLocalChecked()->IsNativeError()) {
return;
}
out << "\n================================================================================";
out << "\n==== JavaScript Exception Details ==============================================\n\n";
#if NODE_MAJOR_VERSION > 5
Local<Message> message = v8::Exception::CreateMessage(isolate, error.ToLocalChecked());
#else
Local<Message> message = v8::Exception::CreateMessage(error.ToLocalChecked());
#endif
Nan::Utf8String message_str(message->Get());
out << *message_str << "\n\n";
Local<StackTrace> stack = v8::Exception::GetStackTrace(error.ToLocalChecked());
if (stack.IsEmpty()) {
out << "No stack trace available from Exception::GetStackTrace()\n";
return;
}
// Print the stack trace, samples are not available as the exception isn't from the current stack.
for (int i = 0; i < stack->GetFrameCount(); i++) {
PrintStackFrame(out, isolate, stack->GetFrame(
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION >= 7)
isolate,
#endif
i), i, nullptr);
}
}
/*******************************************************************************
* Function to print stack using GetStackSample() and StackTrace::StackTrace()
*
******************************************************************************/
static void PrintStackFromStackTrace(std::ostream& out, Isolate* isolate, DumpEvent event) {
v8::RegisterState state;
v8::SampleInfo info;
void* samples[255];
// Initialise the register state
state.pc = nullptr;
state.fp = &state;
state.sp = &state;
isolate->GetStackSample(state, samples, arraysize(samples), &info);
if (static_cast<size_t>(info.vm_state) < arraysize(v8_states)) {
out << "JavaScript VM state: " << v8_states[info.vm_state] << "\n\n";
} else {
out << "JavaScript VM state: <unknown>\n\n";
}
if (event == kSignal_UV) {
out << "Signal received when event loop idle, no stack trace available\n";
return;
}
Local<StackTrace> stack = StackTrace::CurrentStackTrace(isolate, 255, StackTrace::kDetailed);
if (stack.IsEmpty()) {
out << "\nNo stack trace available from StackTrace::CurrentStackTrace()\n";
return;
}
// Print the stack trace, adding in the pc values from GetStackSample() if available
for (int i = 0; i < stack->GetFrameCount(); i++) {
if (static_cast<size_t>(i) < info.frames_count) {
PrintStackFrame(out, isolate, stack->GetFrame(
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION >= 7)
isolate,
#endif
i), i, samples[i]);
} else {
PrintStackFrame(out, isolate, stack->GetFrame(
#if defined(V8_MAJOR_VERSION) && (V8_MAJOR_VERSION >= 7)
isolate,
#endif
i), i, nullptr);
}
}
}
/*******************************************************************************
* Function to print a JavaScript stack frame from a V8 StackFrame object
*
******************************************************************************/
static void PrintStackFrame(std::ostream& out, Isolate* isolate, Local<StackFrame> frame, int i, void* pc) {
Nan::Utf8String fn_name_s(frame->GetFunctionName());
Nan::Utf8String script_name(frame->GetScriptName());
const int line_number = frame->GetLineNumber();
const int column = frame->GetColumn();
char buf[64];
// First print the frame index and the instruction address
if (pc != nullptr) {
#ifdef _WIN32
snprintf( buf, sizeof(buf), "%2d: [pc=0x%p] ", i, pc);
#else
snprintf( buf, sizeof(buf), "%2d: [pc=%p] ", i, pc);
#endif
out << buf;
}
// Now print the JavaScript function name and source information
if (frame->IsEval()) {
if (frame->GetScriptId() == Message::kNoScriptIdInfo) {
out << "at [eval]:" << line_number << ":" << column << "\n";
} else {
out << "at [eval] (" << *script_name << ":" << line_number << ":"
<< column << ")\n";
}
return;
}
if (fn_name_s.length() == 0) {
out << *script_name << ":" << line_number << ":" << column << "\n";
} else {
if (frame->IsConstructor()) {
out << *fn_name_s << " [constructor] (" << *script_name << ":"
<< line_number << ":" << column << ")\n";
} else {
out << *fn_name_s << " (" << *script_name << ":" << line_number << ":"
<< column << ")\n";
}
}
}
#ifdef _WIN32
/*******************************************************************************
* Function to print a native stack backtrace
*
******************************************************************************/
void PrintNativeStack(std::ostream& out) {
void* frames[64];
out << "\n================================================================================";
out << "\n==== Native Stack Trace ========================================================\n\n";
HANDLE hProcess = GetCurrentProcess();
SymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);
SymInitialize(hProcess, nullptr, TRUE);
char buf[64];
WORD numberOfFrames = CaptureStackBackTrace(2, 64, frames, nullptr);
// Walk the frames printing symbolic information if available
for (int i = 0; i < numberOfFrames; i++) {
DWORD64 dwOffset64 = 0;
DWORD64 dwAddress = reinterpret_cast<DWORD64>(frames[i]);
char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(TCHAR)];
PSYMBOL_INFO pSymbol = reinterpret_cast<PSYMBOL_INFO>(buffer);
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
pSymbol->MaxNameLen = MAX_SYM_NAME;
if (SymFromAddr(hProcess, dwAddress, &dwOffset64, pSymbol)) {
DWORD dwOffset = 0;
IMAGEHLP_LINE64 line;
line.SizeOfStruct = sizeof(line);
snprintf(buf, sizeof(buf), "%2d: [pc=0x%p]", i, reinterpret_cast<void*>(pSymbol->Address));
out << buf << " " << pSymbol->Name << " [+";
if (SymGetLineFromAddr64(hProcess, dwAddress, &dwOffset, &line)) {
out << dwOffset << "] in " << line.FileName << ": line: " << line.LineNumber << "\n";
} else {
out << dwOffset64 << "]\n";
}
} else { // SymFromAddr() failed, just print the address
snprintf(buf, sizeof(buf), "%2d: [pc=0x%p]\n", i, reinterpret_cast<void*>(dwAddress));
out << buf;
}
}
}
#elif _AIX
/*******************************************************************************
* Function to print a native stack backtrace - AIX
*
******************************************************************************/
void PrintNativeStack(std::ostream& out) {
out << "\n================================================================================";
out << "\n==== Native Stack Trace ========================================================\n\n";
out << "Native stack trace not supported on AIX\n";
}
#elif (defined(__linux__) && !defined(__GLIBC__))
/*******************************************************************************
* Function to print a native stack backtrace - Alpine Linux etc
*
******************************************************************************/
void PrintNativeStack(std::ostream& out) {
out << "\n================================================================================";
out << "\n==== Native Stack Trace ========================================================\n\n";
out << "Native stack trace not supported on Linux platforms without GLIBC\n";
}
#else
/*******************************************************************************
* Function to print a native stack backtrace - Linux/OSX
*
******************************************************************************/
void PrintNativeStack(std::ostream& out) {
void* frames[256];
char buf[64];
out << "\n================================================================================";
out << "\n==== Native Stack Trace ========================================================\n\n";
// Get the native backtrace (array of instruction addresses)
const int size = backtrace(frames, arraysize(frames));
if (size <= 0) {
out << "Native backtrace failed, error " << size << "\n";
return;
} else if (size <=2) {
out << "No frames to print\n";
return;
}
// Print the native frames, omitting the top 3 frames as they are in node-report code
// backtrace_symbols_fd(frames, size, fileno(fp));
for (int i = 2; i < size; i++) {
// print frame index and instruction address
snprintf(buf, sizeof(buf), "%2d: [pc=%p] ", i-2, frames[i]);
out << buf;
// If we can translate the address using dladdr() print additional symbolic information
Dl_info info;
if (dladdr(frames[i], &info)) {
if (info.dli_sname != nullptr) {
if (char* demangled = abi::__cxa_demangle(info.dli_sname, 0, 0, 0)) {
out << demangled; // print demangled symbol name
free(demangled);
} else {
out << info.dli_sname; // just print the symbol name
}
}
if (info.dli_fname != nullptr) {
out << " [" << info.dli_fname << "]"; // print shared object name
}
}
out << std::endl;
}
}
#endif
/*******************************************************************************
* Function to print V8 JavaScript heap information.
*
* This uses the existing V8 HeapStatistics and HeapSpaceStatistics APIs.
* The isolate->GetGCStatistics(&heap_stats) internal V8 API could potentially
* provide some more useful information - the GC history and the handle counts
******************************************************************************/
static void PrintGCStatistics(std::ostream& out, Isolate* isolate) {
HeapStatistics v8_heap_stats;
isolate->GetHeapStatistics(&v8_heap_stats);
out << "\n================================================================================";
out << "\n==== JavaScript Heap and Garbage Collector =====================================\n";
HeapSpaceStatistics v8_heap_space_stats;
// Loop through heap spaces
for (size_t i = 0; i < isolate->NumberOfHeapSpaces(); i++) {
isolate->GetHeapSpaceStatistics(&v8_heap_space_stats, i);
out << "\nHeap space name: " << v8_heap_space_stats.space_name();
out << "\n Memory size: ";
WriteInteger(out, v8_heap_space_stats.space_size());
out << " bytes, committed memory: ";
WriteInteger(out, v8_heap_space_stats.physical_space_size());
out << " bytes\n Capacity: ";
WriteInteger(out, v8_heap_space_stats.space_used_size() +
v8_heap_space_stats.space_available_size());
out << " bytes, used: ";
WriteInteger(out, v8_heap_space_stats.space_used_size());
out << " bytes, available: ";
WriteInteger(out, v8_heap_space_stats.space_available_size());
out << " bytes";
}
out << "\n\nTotal heap memory size: ";
WriteInteger(out, v8_heap_stats.total_heap_size());
out << " bytes\nTotal heap committed memory: ";
WriteInteger(out, v8_heap_stats.total_physical_size());
out << " bytes\nTotal used heap memory: ";
WriteInteger(out, v8_heap_stats.used_heap_size());
out << " bytes\nTotal available heap memory: ";
WriteInteger(out, v8_heap_stats.total_available_size());
out << " bytes\n\nHeap memory limit: ";
WriteInteger(out, v8_heap_stats.heap_size_limit());
out << "\n";
}
#ifndef _WIN32
/*******************************************************************************
* Function to print resource usage (Linux/OSX only).
*
******************************************************************************/
static void PrintResourceUsage(std::ostream& out) {
char buf[64];
double cpu_abs;
double cpu_percentage;
time_t current_time; // current time absolute
time(¤t_time);
auto uptime = difftime(current_time, load_time);
if (uptime == 0)
uptime = 1; // avoid division by zero.
out << "\n================================================================================";
out << "\n==== Resource Usage ============================================================\n";
// Process and current thread usage statistics
struct rusage stats;
out << "\nProcess total resource usage:";
if (getrusage(RUSAGE_SELF, &stats) == 0) {
#if defined(__APPLE__) || defined(_AIX)
snprintf( buf, sizeof(buf), "%ld.%06d", stats.ru_utime.tv_sec, stats.ru_utime.tv_usec);
out << "\n User mode CPU: " << buf << " secs";
snprintf( buf, sizeof(buf), "%ld.%06d", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#else
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_utime.tv_sec, stats.ru_utime.tv_usec);
out << "\n User mode CPU: " << buf << " secs";
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#endif
cpu_abs = stats.ru_utime.tv_sec + 0.000001 * stats.ru_utime.tv_usec + stats.ru_stime.tv_sec + 0.000001 * stats.ru_stime.tv_usec;
cpu_percentage = (cpu_abs / uptime) * 100.0;
out << "\n Average CPU Consumption : "<< cpu_percentage << "%";
out << "\n Maximum resident set size: ";
WriteInteger(out, stats.ru_maxrss * 1024);
out << " bytes\n Page faults: " << stats.ru_majflt << " (I/O required) "
<< stats.ru_minflt << " (no I/O required)";
out << "\n Filesystem activity: " << stats.ru_inblock << " reads "
<< stats.ru_oublock << " writes";
}
#ifdef RUSAGE_THREAD
out << "\n\nEvent loop thread resource usage:";
memset(&stats, 0, sizeof(stats));
if (getrusage(RUSAGE_THREAD, &stats) == 0) {
#if defined(__APPLE__) || defined(_AIX)
snprintf( buf, sizeof(buf), "%ld.%06d", stats.ru_utime.tv_sec, stats.ru_utime.tv_usec);
out << "\n User mode CPU: " << buf << " secs";
snprintf( buf, sizeof(buf), "%ld.%06d", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#else
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_utime.tv_sec, stats.ru_utime.tv_usec);
out << "\n User mode CPU: " << buf << " secs";
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#endif
cpu_abs = stats.ru_utime.tv_sec + 0.000001 * stats.ru_utime.tv_usec + stats.ru_stime.tv_sec + 0.000001 * stats.ru_stime.tv_usec;
cpu_percentage = (cpu_abs / uptime) * 100.0;
out << "\n Average CPU Consumption : " << cpu_percentage << "%";
out << "\n Filesystem activity: " << stats.ru_inblock << " reads "
<< stats.ru_oublock << " writes";
}
#elif defined(__APPLE__)
// Currently RUSAGE_THREAD is not currently supported on Mac.
mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
mach_port_t thread = pthread_mach_thread_np(pthread_self());
thread_basic_info thr_info;
kern_return_t rc = thread_info(thread, THREAD_BASIC_INFO, (thread_info_t) &thr_info, &count);
if (rc == KERN_SUCCESS) {
out << "\n\nEvent loop thread resource usage:";
snprintf( buf, sizeof(buf), "%d.%06d", thr_info.user_time.seconds, thr_info.user_time.microseconds);
out << "\n User mode CPU: " << buf << " secs";
snprintf( buf, sizeof(buf), "%d.%06d", thr_info.system_time.seconds, thr_info.system_time.microseconds);
out << "\n Kernel mode CPU: " << buf << " secs";
cpu_abs = thr_info.user_time.seconds + 0.000001 * thr_info.user_time.microseconds
+ thr_info.system_time.seconds + 0.000001 * thr_info.system_time.microseconds;
cpu_percentage = (cpu_abs / uptime) * 100.0;
out << "\n Average CPU Consumption : " << cpu_percentage << "%";
}
#endif // RUSAGE_THREAD
out << std::endl;
}
#endif
/*******************************************************************************
* Function to print operating system information.
*
******************************************************************************/
static void PrintSystemInformation(std::ostream& out, Isolate* isolate) {
out << "\n================================================================================";
out << "\n==== System Information ========================================================\n";
#ifdef _WIN32
out << "\nEnvironment variables\n";
LPTSTR lpszVariable;
LPTCH lpvEnv;
// Get pointer to the environment block
lpvEnv = GetEnvironmentStrings();
if (lpvEnv != nullptr) {
// Variable strings are separated by null bytes, and the block is terminated by a null byte.
lpszVariable = reinterpret_cast<LPTSTR>(lpvEnv);
while (*lpszVariable) {
out << " " << lpszVariable << "\n", lpszVariable;
lpszVariable += lstrlen(lpszVariable) + 1;
}
FreeEnvironmentStrings(lpvEnv);
}
#else
out << "\nEnvironment variables\n";
int index = 1;
char* env_var = *environ;
while (env_var != nullptr) {
out << " " << env_var << "\n";
env_var = *(environ + index++);
}
const static struct {
const char* description;
int id;
} rlimit_strings[] = {
{"core file size (blocks) ", RLIMIT_CORE},
{"data seg size (kbytes) ", RLIMIT_DATA},
{"file size (blocks) ", RLIMIT_FSIZE},
#if !(defined(_AIX) || defined(__sun))
{"max locked memory (bytes) ", RLIMIT_MEMLOCK},
#endif
#ifndef __sun
{"max memory size (kbytes) ", RLIMIT_RSS},
#endif
{"open files ", RLIMIT_NOFILE},
{"stack size (bytes) ", RLIMIT_STACK},
{"cpu time (seconds) ", RLIMIT_CPU},
#ifndef __sun
{"max user processes ", RLIMIT_NPROC},
#endif
{"virtual memory (kbytes) ", RLIMIT_AS}
};
out << "\nResource limits soft limit hard limit\n";
struct rlimit limit;
char buf[64];
for (size_t i = 0; i < arraysize(rlimit_strings); i++) {
if (getrlimit(rlimit_strings[i].id, &limit) == 0) {
out << " " << rlimit_strings[i].description << " ";
if (limit.rlim_cur == RLIM_INFINITY) {
out << " unlimited";
} else {
#if defined(_AIX) || defined(__sun)
snprintf(buf, sizeof(buf), "%16ld", limit.rlim_cur);
out << buf;
#elif (defined(__linux__) && !defined(__GLIBC__))
snprintf(buf, sizeof(buf), "%16lld", limit.rlim_cur);
out << buf;
#else
snprintf(buf, sizeof(buf), "%16" PRIu64, limit.rlim_cur);
out << buf;
#endif
}
if (limit.rlim_max == RLIM_INFINITY) {
out << " unlimited\n";
} else {
#if defined(_AIX)
snprintf(buf, sizeof(buf), "%16ld\n", limit.rlim_max);
out << buf;
#elif (defined(__linux__) && !defined(__GLIBC__))
snprintf(buf, sizeof(buf), "%16lld\n", limit.rlim_max);
out << buf;
#else
snprintf(buf, sizeof(buf), "%16" PRIu64 "\n", limit.rlim_max);
out << buf;
#endif
}
}
}
#endif
out << "\nLoaded libraries\n";
PrintLoadedLibraries(out, isolate);
}
/*******************************************************************************
* Functions to print a list of loaded native libraries.
*
******************************************************************************/
#ifdef __linux__
static int LibraryPrintCallback(struct dl_phdr_info *info, size_t size, void *data) {
std::ostream* out = reinterpret_cast<std::ostream*>(data);
if (info->dlpi_name != nullptr && *info->dlpi_name != '\0') {
*out << " " << info->dlpi_name << "\n";
}
return 0;
}
#endif
static void PrintLoadedLibraries(std::ostream& out, Isolate* isolate) {
#ifdef __linux__
dl_iterate_phdr(LibraryPrintCallback, &out);
#elif __APPLE__
int i = 0;
const char *name = _dyld_get_image_name(i);
while (name != nullptr) {
out << " " << name << "\n";
i++;
name = _dyld_get_image_name(i);
}
#elif _AIX
// We can't tell in advance how large the buffer needs to be.
// Retry until we reach too large a size (1Mb).
const unsigned int buffer_inc = 4096;
unsigned int buffer_size = buffer_inc;
char* buffer = (char*) malloc(buffer_size);
int rc = -1;
while (buffer != nullptr && rc != 0 && buffer_size < 1024 * 1024) {
rc = loadquery(L_GETINFO, buffer, buffer_size);
if (rc == 0) {
break;
}
free(buffer);
buffer_size += buffer_inc;
buffer = (char*) malloc(buffer_size);
}
if (buffer == nullptr) {
return; // Don't try to free the buffer.
}
if (rc == 0) {
char* buf = buffer;
ld_info* cur_info = nullptr;