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// 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.
#include "msvc_helper.h"
#include <stdio.h>
#include <string.h>
#include <windows.h>
#include "includes_normalize.h"
#include "util.h"
namespace {
/// Return true if \a input ends with \a needle.
bool EndsWith(const string& input, const string& needle) {
return (input.size() >= needle.size() &&
input.substr(input.size() - needle.size()) == needle);
}
string Replace(const string& input, const string& find, const string& replace) {
string result = input;
size_t start_pos = 0;
while ((start_pos = result.find(find, start_pos)) != string::npos) {
result.replace(start_pos, find.length(), replace);
start_pos += replace.length();
}
return result;
}
string EscapeForDepfile(const string& path) {
// Depfiles don't escape single \.
return Replace(path, " ", "\\ ");
}
} // anonymous namespace
// static
string CLWrapper::FilterShowIncludes(const string& line) {
static const char kMagicPrefix[] = "Note: including file: ";
const char* in = line.c_str();
const char* end = in + line.size();
if (end - in > (int)sizeof(kMagicPrefix) - 1 &&
memcmp(in, kMagicPrefix, sizeof(kMagicPrefix) - 1) == 0) {
in += sizeof(kMagicPrefix) - 1;
while (*in == ' ')
++in;
return line.substr(in - line.c_str());
}
return "";
}
// static
bool CLWrapper::IsSystemInclude(const string& path) {
// TODO: this is a heuristic, perhaps there's a better way?
return (path.find("program files") != string::npos ||
path.find("microsoft visual studio") != string::npos);
}
// static
bool CLWrapper::FilterInputFilename(const string& line) {
// TODO: other extensions, like .asm?
return EndsWith(line, ".c") ||
EndsWith(line, ".cc") ||
EndsWith(line, ".cxx") ||
EndsWith(line, ".cpp");
}
int CLWrapper::Run(const string& command, string* extra_output) {
SECURITY_ATTRIBUTES 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");
HANDLE stdout_read, stdout_write;
if (!CreatePipe(&stdout_read, &stdout_write, &security_attributes, 0))
Win32Fatal("CreatePipe");
if (!SetHandleInformation(stdout_read, HANDLE_FLAG_INHERIT, 0))
Win32Fatal("SetHandleInformation");
PROCESS_INFORMATION process_info = {};
STARTUPINFO startup_info = {};
startup_info.cb = sizeof(STARTUPINFO);
startup_info.hStdInput = nul;
startup_info.hStdError = stdout_write;
startup_info.hStdOutput = stdout_write;
startup_info.dwFlags |= STARTF_USESTDHANDLES;
if (!CreateProcessA(NULL, (char*)command.c_str(), NULL, NULL,
/* inherit handles */ TRUE, 0,
env_block_, NULL,
&startup_info, &process_info)) {
Win32Fatal("CreateProcess");
}
if (!CloseHandle(nul) ||
!CloseHandle(stdout_write)) {
Win32Fatal("CloseHandle");
}
// Read output of the subprocess and parse it.
string output;
DWORD read_len = 1;
while (read_len) {
char buf[64 << 10];
read_len = 0;
if (!::ReadFile(stdout_read, buf, sizeof(buf), &read_len, NULL) &&
GetLastError() != ERROR_BROKEN_PIPE) {
Win32Fatal("ReadFile");
}
output.append(buf, read_len);
// Loop over all lines in the output and process them.
for (;;) {
size_t ofs = output.find_first_of("\r\n");
if (ofs == string::npos)
break;
string line = output.substr(0, ofs);
string include = FilterShowIncludes(line);
if (!include.empty()) {
include = IncludesNormalize::Normalize(include, NULL);
if (!IsSystemInclude(include))
includes_.insert(include);
} else if (FilterInputFilename(line)) {
// Drop it.
// TODO: if we support compiling multiple output files in a single
// cl.exe invocation, we should stash the filename.
} else {
if (extra_output) {
extra_output->append(line);
extra_output->append("\n");
} else {
printf("%s\n", line.c_str());
}
}
if (ofs < output.size() && output[ofs] == '\r')
++ofs;
if (ofs < output.size() && output[ofs] == '\n')
++ofs;
output = output.substr(ofs);
}
}
if (WaitForSingleObject(process_info.hProcess, INFINITE) == WAIT_FAILED)
Win32Fatal("WaitForSingleObject");
DWORD exit_code = 0;
if (!GetExitCodeProcess(process_info.hProcess, &exit_code))
Win32Fatal("GetExitCodeProcess");
if (!CloseHandle(stdout_read) ||
!CloseHandle(process_info.hProcess) ||
!CloseHandle(process_info.hThread)) {
Win32Fatal("CloseHandle");
}
return exit_code;
}
vector<string> CLWrapper::GetEscapedResult() {
vector<string> result;
for (set<string>::iterator i = includes_.begin(); i != includes_.end(); ++i) {
result.push_back(EscapeForDepfile(*i));
}
return result;
}
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