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// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package main
import (
"fmt"
"io"
"path/filepath"
"strings"
)
func callCompiler(env env, cfg *config, inputCmd *command) int {
var compilerErr error
if !filepath.IsAbs(inputCmd.Path) && !strings.HasPrefix(inputCmd.Path, ".") &&
!strings.ContainsRune(inputCmd.Path, filepath.Separator) {
if resolvedPath, err := resolveAgainstPathEnv(env, inputCmd.Path); err == nil {
inputCmd = &command{
Path: resolvedPath,
Args: inputCmd.Args,
EnvUpdates: inputCmd.EnvUpdates,
}
} else {
compilerErr = err
}
}
exitCode := 0
if compilerErr == nil {
exitCode, compilerErr = callCompilerInternal(env, cfg, inputCmd)
}
if compilerErr != nil {
printCompilerError(env.stderr(), compilerErr)
exitCode = 1
}
return exitCode
}
func callCompilerInternal(env env, cfg *config, inputCmd *command) (exitCode int, err error) {
if err := checkUnsupportedFlags(inputCmd); err != nil {
return 0, err
}
mainBuilder, err := newCommandBuilder(env, cfg, inputCmd)
if err != nil {
return 0, err
}
processPrintConfigFlag(mainBuilder)
processPrintCmdlineFlag(mainBuilder)
env = mainBuilder.env
var compilerCmd *command
clangSyntax := processClangSyntaxFlag(mainBuilder)
if cfg.isAndroidWrapper {
// FIXME: This combination of using the directory of the symlink but the
// basename of the link target is strange but is the logic that old android
// wrapper uses. Change this to use directory and basename either from the
// absWrapperPath or from the builder.path, but don't mix anymore.
mainBuilder.path = filepath.Join(filepath.Dir(mainBuilder.path), filepath.Base(mainBuilder.absWrapperPath)+".real")
switch mainBuilder.target.compilerType {
case clangType:
mainBuilder.addPreUserArgs(mainBuilder.cfg.clangFlags...)
mainBuilder.addPreUserArgs(mainBuilder.cfg.commonFlags...)
if _, err := processGomaCccFlags(mainBuilder); err != nil {
return 0, err
}
compilerCmd = mainBuilder.build()
case clangTidyType:
compilerCmd = mainBuilder.build()
default:
return 0, newErrorwithSourceLocf("unsupported compiler: %s", mainBuilder.target.compiler)
}
} else if mainBuilder.target.compilerType == clangType {
cSrcFile, useClangTidy := processClangTidyFlags(mainBuilder)
sysroot, err := prepareClangCommand(mainBuilder)
if err != nil {
return 0, err
}
allowCCache := true
if useClangTidy {
allowCCache = false
clangCmdWithoutGomaAndCCache := mainBuilder.build()
if err := runClangTidy(env, clangCmdWithoutGomaAndCCache, cSrcFile); err != nil {
return 0, err
}
}
if err := processGomaCCacheFlags(sysroot, allowCCache, mainBuilder); err != nil {
return 0, err
}
compilerCmd = mainBuilder.build()
} else {
if clangSyntax {
allowCCache := false
clangCmd, err := calcClangCommand(allowCCache, mainBuilder.clone())
if err != nil {
return 0, err
}
gccCmd, err := calcGccCommand(mainBuilder)
if err != nil {
return 0, err
}
return checkClangSyntax(env, clangCmd, gccCmd)
}
compilerCmd, err = calcGccCommand(mainBuilder)
if err != nil {
return 0, err
}
}
rusageLogfileName := getRusageLogFilename(env)
bisectStage := getBisectStage(env)
if shouldForceDisableWError(env) {
if rusageLogfileName != "" {
return 0, newUserErrorf("GETRUSAGE is meaningless with FORCE_DISABLE_WERROR")
}
if bisectStage != "" {
return 0, newUserErrorf("BISECT_STAGE is meaningless with FORCE_DISABLE_WERROR")
}
return doubleBuildWithWNoError(env, cfg, compilerCmd)
}
if shouldCompileWithFallback(env) {
if rusageLogfileName != "" {
return 0, newUserErrorf("GETRUSAGE is meaningless with FORCE_DISABLE_WERROR")
}
if bisectStage != "" {
return 0, newUserErrorf("BISECT_STAGE is meaningless with FORCE_DISABLE_WERROR")
}
return compileWithFallback(env, cfg, compilerCmd, mainBuilder.absWrapperPath)
}
if rusageLogfileName != "" {
if bisectStage != "" {
return 0, newUserErrorf("BISECT_STAGE is meaningless with GETRUSAGE")
}
return logRusage(env, rusageLogfileName, compilerCmd)
}
if bisectStage != "" {
compilerCmd, err = calcBisectCommand(env, cfg, bisectStage, compilerCmd)
if err != nil {
return 0, err
}
}
// Note: We return an exit code only if the underlying env is not
// really doing an exec, e.g. commandRecordingEnv.
return wrapSubprocessErrorWithSourceLoc(compilerCmd, env.exec(compilerCmd))
}
func prepareClangCommand(builder *commandBuilder) (sysroot string, err error) {
sysroot = ""
if !builder.cfg.isHostWrapper {
sysroot = processSysrootFlag(builder)
}
builder.addPreUserArgs(builder.cfg.clangFlags...)
builder.addPostUserArgs(builder.cfg.clangPostFlags...)
calcCommonPreUserArgs(builder)
if err := processClangFlags(builder); err != nil {
return "", err
}
return sysroot, nil
}
func calcClangCommand(allowCCache bool, builder *commandBuilder) (*command, error) {
sysroot, err := prepareClangCommand(builder)
if err != nil {
return nil, err
}
if err := processGomaCCacheFlags(sysroot, allowCCache, builder); err != nil {
return nil, err
}
return builder.build(), nil
}
func calcGccCommand(builder *commandBuilder) (*command, error) {
sysroot := ""
if !builder.cfg.isHostWrapper {
sysroot = processSysrootFlag(builder)
}
builder.addPreUserArgs(builder.cfg.gccFlags...)
if !builder.cfg.isHostWrapper {
calcCommonPreUserArgs(builder)
}
processGccFlags(builder)
if !builder.cfg.isHostWrapper {
allowCCache := true
if err := processGomaCCacheFlags(sysroot, allowCCache, builder); err != nil {
return nil, err
}
}
return builder.build(), nil
}
func calcCommonPreUserArgs(builder *commandBuilder) {
builder.addPreUserArgs(builder.cfg.commonFlags...)
if !builder.cfg.isHostWrapper {
processPieFlags(builder)
processThumbCodeFlags(builder)
processStackProtectorFlags(builder)
processX86Flags(builder)
}
processSanitizerFlags(builder)
}
func processGomaCCacheFlags(sysroot string, allowCCache bool, builder *commandBuilder) (err error) {
gomaccUsed := false
if !builder.cfg.isHostWrapper {
gomaccUsed, err = processGomaCccFlags(builder)
if err != nil {
return err
}
}
if !gomaccUsed && allowCCache {
processCCacheFlag(sysroot, builder)
}
return nil
}
func getAbsWrapperPath(env env, wrapperCmd *command) (string, error) {
wrapperPath := getAbsCmdPath(env, wrapperCmd)
evaledCmdPath, err := filepath.EvalSymlinks(wrapperPath)
if err != nil {
return "", wrapErrorwithSourceLocf(err, "failed to evaluate symlinks for %s", wrapperPath)
}
return evaledCmdPath, nil
}
func printCompilerError(writer io.Writer, compilerErr error) {
if _, ok := compilerErr.(userError); ok {
fmt.Fprintf(writer, "%s\n", compilerErr)
} else {
fmt.Fprintf(writer,
"Internal error. Please report to chromeos-toolchain@google.com.\n%s\n",
compilerErr)
}
}
func teeStdinIfNeeded(env env, inputCmd *command, dest io.Writer) io.Reader {
// We can't use io.TeeReader unconditionally, as that would block
// calls to exec.Cmd.Run(), even if the underlying process has already
// terminated. See https://github.com/golang/go/issues/7990 for more details.
lastArg := ""
for _, arg := range inputCmd.Args {
if arg == "-" && lastArg != "-o" {
return io.TeeReader(env.stdin(), dest)
}
lastArg = arg
}
return env.stdin()
}
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