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/*
ninja's subprocess.h
*/
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef NINJA_SUBPROCESS_H_
#define NINJA_SUBPROCESS_H_
#include <string>
#include <vector>
#include <queue>
using namespace std;
#ifdef _WIN32
#include <windows.h>
#else
#include <signal.h>
#endif
//#include "exit_status.h"
enum ExitStatus {
ExitSuccess,
ExitFailure,
ExitInterrupted
};
/// Subprocess wraps a single async subprocess. It is entirely
/// passive: it expects the caller to notify it when its fds are ready
/// for reading, as well as call Finish() to reap the child once done()
/// is true.
struct Subprocess {
~Subprocess();
/// Returns ExitSuccess on successful process exit, ExitInterrupted if
/// the process was interrupted, ExitFailure if it otherwise failed.
ExitStatus Finish();
bool Done() const;
const string& GetOutput() const;
int ExitCode() const { return exit_code_; }
private:
Subprocess();
bool Start(struct SubprocessSet* set, const string& command);
void OnPipeReady();
string buf_;
#ifdef _WIN32
/// Set up pipe_ as the parent-side pipe of the subprocess; return the
/// other end of the pipe, usable in the child process.
HANDLE SetupPipe(HANDLE ioport);
HANDLE child_;
HANDLE pipe_;
OVERLAPPED overlapped_;
char overlapped_buf_[4 << 10];
bool is_reading_;
int exit_code_;
#else
int fd_;
pid_t pid_;
#endif
friend struct SubprocessSet;
};
/// SubprocessSet runs a ppoll/pselect() loop around a set of Subprocesses.
/// DoWork() waits for any state change in subprocesses; finished_
/// is a queue of subprocesses as they finish.
struct SubprocessSet {
SubprocessSet();
~SubprocessSet();
Subprocess* Add(const string& command);
bool DoWork();
Subprocess* NextFinished();
void Clear();
vector<Subprocess*> running_;
queue<Subprocess*> finished_;
#ifdef _WIN32
static BOOL WINAPI NotifyInterrupted(DWORD dwCtrlType);
static HANDLE ioport_;
#else
static void SetInterruptedFlag(int signum);
static bool interrupted_;
struct sigaction old_act_;
sigset_t old_mask_;
#endif
};
#endif // NINJA_SUBPROCESS_H_
/*
ninja's util functions
*/
static void Fatal(const char* msg, ...) {
va_list ap;
fprintf(stderr, "ninja: FATAL: ");
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fprintf(stderr, "\n");
#ifdef _WIN32
// On Windows, some tools may inject extra threads.
// exit() may block on locks held by those threads, so forcibly exit.
fflush(stderr);
fflush(stdout);
ExitProcess(1);
#else
exit(1);
#endif
}
#ifdef _WIN32
string GetLastErrorString() {
DWORD err = GetLastError();
char* msg_buf;
FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(char*)&msg_buf,
0,
NULL);
string msg = msg_buf;
LocalFree(msg_buf);
return msg;
}
#endif
#define snprintf _snprintf
/*
ninja's subprocess-win32.cc
*/
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//#include "subprocess.h"
#include <stdio.h>
#include <algorithm>
//#include "util.h"
namespace {
void Win32Fatal(const char* function) {
Fatal("%s: %s", function, GetLastErrorString().c_str());
}
} // anonymous namespace
Subprocess::Subprocess() : child_(NULL) , overlapped_(), is_reading_(false),
exit_code_(1) {
}
Subprocess::~Subprocess() {
if (pipe_) {
if (!CloseHandle(pipe_))
Win32Fatal("CloseHandle");
}
// Reap child if forgotten.
if (child_)
Finish();
}
HANDLE Subprocess::SetupPipe(HANDLE ioport) {
char pipe_name[100];
snprintf(pipe_name, sizeof(pipe_name),
"\\\\.\\pipe\\ninja_pid%u_sp%p", GetCurrentProcessId(), this);
pipe_ = ::CreateNamedPipeA(pipe_name,
PIPE_ACCESS_INBOUND | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE,
PIPE_UNLIMITED_INSTANCES,
0, 0, INFINITE, NULL);
if (pipe_ == INVALID_HANDLE_VALUE)
Win32Fatal("CreateNamedPipe");
if (!CreateIoCompletionPort(pipe_, ioport, (ULONG_PTR)this, 0))
Win32Fatal("CreateIoCompletionPort");
memset(&overlapped_, 0, sizeof(overlapped_));
if (!ConnectNamedPipe(pipe_, &overlapped_) &&
GetLastError() != ERROR_IO_PENDING) {
Win32Fatal("ConnectNamedPipe");
}
// Get the write end of the pipe as a handle inheritable across processes.
HANDLE output_write_handle = CreateFile(pipe_name, GENERIC_WRITE, 0,
NULL, OPEN_EXISTING, 0, NULL);
HANDLE output_write_child;
if (!DuplicateHandle(GetCurrentProcess(), output_write_handle,
GetCurrentProcess(), &output_write_child,
0, TRUE, DUPLICATE_SAME_ACCESS)) {
Win32Fatal("DuplicateHandle");
}
CloseHandle(output_write_handle);
return output_write_child;
}
bool Subprocess::Start(SubprocessSet* set, const string& command) {
HANDLE child_pipe = SetupPipe(set->ioport_);
SECURITY_ATTRIBUTES security_attributes;
memset(&security_attributes, 0, sizeof(SECURITY_ATTRIBUTES));
security_attributes.nLength = sizeof(SECURITY_ATTRIBUTES);
security_attributes.bInheritHandle = TRUE;
// Must be inheritable so subprocesses can dup to children.
HANDLE nul = CreateFile("NUL", GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
&security_attributes, OPEN_EXISTING, 0, NULL);
if (nul == INVALID_HANDLE_VALUE)
Fatal("couldn't open nul");
STARTUPINFOA startup_info;
memset(&startup_info, 0, sizeof(startup_info));
startup_info.cb = sizeof(STARTUPINFO);
startup_info.dwFlags = STARTF_USESTDHANDLES;
startup_info.hStdInput = nul;
startup_info.hStdOutput = child_pipe;
startup_info.hStdError = child_pipe;
PROCESS_INFORMATION process_info;
memset(&process_info, 0, sizeof(process_info));
// Do not prepend 'cmd /c' on Windows, this breaks command
// lines greater than 8,191 chars.
if (!CreateProcessA(NULL, (char*)command.c_str(), NULL, NULL,
/* inherit handles */ TRUE, CREATE_NEW_PROCESS_GROUP,
NULL, NULL,
&startup_info, &process_info)) {
DWORD error = GetLastError();
if (error == ERROR_FILE_NOT_FOUND) {
// file (program) not found error is treated
// as a normal build action failure
if (child_pipe)
CloseHandle(child_pipe);
CloseHandle(pipe_);
CloseHandle(nul);
pipe_ = NULL;
// child_ is already NULL;
buf_ =
"CreateProcess failed: The system cannot find the file specified.\n";
return true;
} else {
Win32Fatal("CreateProcess"); // pass all other errors to Win32Fatal
}
}
// Close pipe channel only used by the child.
if (child_pipe)
CloseHandle(child_pipe);
CloseHandle(nul);
CloseHandle(process_info.hThread);
child_ = process_info.hProcess;
return true;
}
void Subprocess::OnPipeReady() {
DWORD bytes;
if (!GetOverlappedResult(pipe_, &overlapped_, &bytes, TRUE)) {
if (GetLastError() == ERROR_BROKEN_PIPE) {
CloseHandle(pipe_);
pipe_ = NULL;
return;
}
Win32Fatal("GetOverlappedResult");
}
if (is_reading_ && bytes)
buf_.append(overlapped_buf_, bytes);
memset(&overlapped_, 0, sizeof(overlapped_));
is_reading_ = true;
if (!::ReadFile(pipe_, overlapped_buf_, sizeof(overlapped_buf_),
&bytes, &overlapped_)) {
if (GetLastError() == ERROR_BROKEN_PIPE) {
CloseHandle(pipe_);
pipe_ = NULL;
return;
}
if (GetLastError() != ERROR_IO_PENDING)
Win32Fatal("ReadFile");
}
// Even if we read any bytes in the readfile call, we'll enter this
// function again later and get them at that point.
}
ExitStatus Subprocess::Finish() {
if (!child_)
return ExitFailure;
// TODO: add error handling for all of these.
WaitForSingleObject(child_, INFINITE);
DWORD exit_code = 0;
GetExitCodeProcess(child_, &exit_code);
CloseHandle(child_);
child_ = NULL;
exit_code_ = exit_code;
return exit_code == 0 ? ExitSuccess :
exit_code == CONTROL_C_EXIT ? ExitInterrupted :
ExitFailure;
}
bool Subprocess::Done() const {
return pipe_ == NULL;
}
const string& Subprocess::GetOutput() const {
return buf_;
}
HANDLE SubprocessSet::ioport_;
SubprocessSet::SubprocessSet() {
ioport_ = ::CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 1);
if (!ioport_)
Win32Fatal("CreateIoCompletionPort");
if (!SetConsoleCtrlHandler(NotifyInterrupted, TRUE))
Win32Fatal("SetConsoleCtrlHandler");
}
SubprocessSet::~SubprocessSet() {
Clear();
SetConsoleCtrlHandler(NotifyInterrupted, FALSE);
CloseHandle(ioport_);
}
BOOL WINAPI SubprocessSet::NotifyInterrupted(DWORD dwCtrlType) {
if (dwCtrlType == CTRL_C_EVENT || dwCtrlType == CTRL_BREAK_EVENT) {
if (!PostQueuedCompletionStatus(ioport_, 0, 0, NULL))
Win32Fatal("PostQueuedCompletionStatus");
return TRUE;
}
return FALSE;
}
Subprocess *SubprocessSet::Add(const string& command) {
Subprocess *subprocess = new Subprocess;
if (!subprocess->Start(this, command)) {
delete subprocess;
return 0;
}
if (subprocess->child_)
running_.push_back(subprocess);
else
finished_.push(subprocess);
return subprocess;
}
bool SubprocessSet::DoWork() {
DWORD bytes_read;
Subprocess* subproc;
OVERLAPPED* overlapped;
if (!GetQueuedCompletionStatus(ioport_, &bytes_read, (PULONG_PTR)&subproc,
&overlapped, INFINITE)) {
if (GetLastError() != ERROR_BROKEN_PIPE)
Win32Fatal("GetQueuedCompletionStatus");
}
if (!subproc) // A NULL subproc indicates that we were interrupted and is
// delivered by NotifyInterrupted above.
return true;
subproc->OnPipeReady();
if (subproc->Done()) {
vector<Subprocess*>::iterator end =
std::remove(running_.begin(), running_.end(), subproc);
if (running_.end() != end) {
finished_.push(subproc);
running_.resize(end - running_.begin());
}
}
return false;
}
Subprocess* SubprocessSet::NextFinished() {
if (finished_.empty())
return NULL;
Subprocess* subproc = finished_.front();
finished_.pop();
return subproc;
}
void SubprocessSet::Clear() {
for (vector<Subprocess*>::iterator i = running_.begin();
i != running_.end(); ++i) {
if ((*i)->child_)
if (!GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT,
GetProcessId((*i)->child_)))
Win32Fatal("GenerateConsoleCtrlEvent");
}
for (vector<Subprocess*>::iterator i = running_.begin();
i != running_.end(); ++i)
delete *i;
running_.clear();
}
// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Wrapper around cl that adds /showIncludes to command line, and uses that to
// generate .d files that match the style from gcc -MD.
//
// /showIncludes is equivalent to -MD, not -MMD, that is, system headers are
// included.
#include <windows.h>
#include <sstream>
//#include "subprocess.h"
//#include "util.h"
// We don't want any wildcard expansion.
// See http://msdn.microsoft.com/en-us/library/zay8tzh6(v=vs.85).aspx
void _setargv() {}
static void usage(const char* msg) {
Fatal("%s\n\nusage:\n "
"cmcldeps "
"<language C, CXX or RC> "
"<source file path> "
"<output path for *.d file> "
"<output path for *.obj file> "
"<prefix of /showIncludes> "
"<path to cl.exe> "
"<path to tool (cl or rc)> "
"<rest of command ...>\n", msg);
}
static string trimLeadingSpace(const string& cmdline) {
int i = 0;
for (; cmdline[i] == ' '; ++i)
;
return cmdline.substr(i);
}
static void doEscape(string& str, const string& search, const string& repl) {
string::size_type pos = 0;
while ((pos = str.find(search, pos)) != string::npos) {
str.replace(pos, search.size(), repl);
pos += repl.size();
}
}
// Strips one argument from the cmdline and returns it. "surrounding quotes"
// are removed from the argument if there were any.
static string getArg(string& cmdline) {
string ret;
bool in_quoted = false;
unsigned int i = 0;
cmdline = trimLeadingSpace(cmdline);
for (;; ++i) {
if (i >= cmdline.size())
usage("Couldn't parse arguments.");
if (!in_quoted && cmdline[i] == ' ')
break; // "a b" "x y"
if (cmdline[i] == '"')
in_quoted = !in_quoted;
}
ret = cmdline.substr(0, i);
if (ret[0] == '"' && ret[i - 1] == '"')
ret = ret.substr(1, ret.size() - 2);
cmdline = cmdline.substr(i);
return ret;
}
static void parseCommandLine(LPTSTR wincmdline,
string& lang,
string& srcfile,
string& dfile,
string& objfile,
string& prefix,
string& clpath,
string& binpath,
string& rest) {
string cmdline(wincmdline);
/* self */ getArg(cmdline);
lang = getArg(cmdline);
srcfile = getArg(cmdline);
dfile = getArg(cmdline);
objfile = getArg(cmdline);
prefix = getArg(cmdline);
clpath = getArg(cmdline);
binpath = getArg(cmdline);
rest = trimLeadingSpace(cmdline);
}
static void outputDepFile(const string& dfile, const string& objfile,
vector<string>& incs) {
if (dfile.empty())
return;
// strip duplicates
sort(incs.begin(), incs.end());
incs.erase(unique(incs.begin(), incs.end()), incs.end());
FILE* out = fopen(dfile.c_str(), "wb");
// FIXME should this be fatal or not? delete obj? delete d?
if (!out)
return;
string tmp = objfile;
doEscape(tmp, " ", "\\ ");
fprintf(out, "%s: \\\n", tmp.c_str());
for (vector<string>::iterator i(incs.begin()); i != incs.end(); ++i) {
tmp = *i;
doEscape(tmp, "\\", "/");
doEscape(tmp, " ", "\\ ");
fprintf(out, "%s \\\n", tmp.c_str());
//printf("include: %s \n", tmp.c_str());
}
fprintf(out, "\n");
fclose(out);
}
bool startsWith(const std::string& str, const std::string& what) {
return str.compare(0, what.size(), what) == 0;
}
bool contains(const std::string& str, const std::string& what) {
return str.find(what) != std::string::npos;
}
std::string replace(const std::string& str, const std::string& what,
const std::string& replacement) {
size_t pos = str.find(what);
if (pos == std::string::npos)
return str;
std::string replaced = str;
return replaced.replace(pos, what.size(), replacement);
}
static int process( const string& srcfilename,
const string& dfile,
const string& objfile,
const string& prefix,
const string& cmd,
bool quiet = false) {
SubprocessSet subprocs;
Subprocess* subproc = subprocs.Add(cmd);
if(!subproc)
return 2;
while ((subproc = subprocs.NextFinished()) == NULL) {
subprocs.DoWork();
}
bool success = subproc->Finish() == ExitSuccess;
int exit_code = subproc->ExitCode();
string output = subproc->GetOutput();
delete subproc;
// process the include directives and output everything else
stringstream ss(output);
string line;
vector<string> includes;
bool isFirstLine = true; // cl prints always first the source filename
while (getline(ss, line)) {
if (startsWith(line, prefix)) {
string inc = trimLeadingSpace(line.substr(prefix.size()).c_str());
if (inc[inc.size() - 1] == '\r') // blech, stupid \r\n
inc = inc.substr(0, inc.size() - 1);
includes.push_back(inc);
} else {
if (!isFirstLine || !startsWith(line, srcfilename)) {
if (!quiet) {
fprintf(stdout, "%s\n", line.c_str());
}
} else {
isFirstLine = false;
}
}
}
if (!success) {
return exit_code;
}
// don't update .d until/unless we succeed compilation
outputDepFile(dfile, objfile, includes);
return 0;
}
int main() {
// Use the Win32 api instead of argc/argv so we can avoid interpreting the
// rest of command line after the .d and .obj. Custom parsing seemed
// preferable to the ugliness you get into in trying to re-escape quotes for
// subprocesses, so by avoiding argc/argv, the subprocess is called with
// the same command line verbatim.
string lang, srcfile, dfile, objfile, prefix, cl, binpath, rest;
parseCommandLine(GetCommandLine(), lang, srcfile, dfile, objfile,
prefix, cl, binpath, rest);
// needed to suppress filename output of msvc tools
string srcfilename;
std::string::size_type pos = srcfile.rfind("\\");
if (pos != string::npos) {
srcfilename = srcfile.substr(pos + 1);
}
std::string nol = " /nologo ";
std::string show = " /showIncludes ";
if (lang == "C" || lang == "CXX") {
return process(srcfilename, dfile, objfile, prefix,
binpath + nol + show + rest);
} else if (lang == "RC") {
// "misuse" cl.exe to get headers from .rc files
string clrest = rest;
// rc: /fo x.dir\x.rc.res -> cl: /out:x.dir\x.rc.res.dep.obj
clrest = replace(clrest, "/fo", "/out:");
clrest = replace(clrest, objfile, objfile + ".dep.obj ");
// rc: src\x\x.rc -> cl: /Tc src\x\x.rc
clrest = replace(clrest, srcfile, "/Tc " + srcfile);
cl = "\"" + cl + "\" /P /DRC_INVOKED ";
// extract dependencies with cl.exe
process(srcfilename, dfile, objfile,
prefix, cl + nol + show + clrest, true);
// compile rc file with rc.exe
return process(srcfilename, "" , objfile, prefix, binpath + nol + rest);
}
usage("Invalid language specified.");
return 1;
}
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