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|
// Package compileopts contains the configuration for a single to-be-built
// binary.
package compileopts
import (
"errors"
"fmt"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/google/shlex"
"github.com/tinygo-org/tinygo/goenv"
)
// Config keeps all configuration affecting the build in a single struct.
type Config struct {
Options *Options
Target *TargetSpec
GoMinorVersion int
TestConfig TestConfig
}
// Triple returns the LLVM target triple, like armv6m-unknown-unknown-eabi.
func (c *Config) Triple() string {
return c.Target.Triple
}
// CPU returns the LLVM CPU name, like atmega328p or arm7tdmi. It may return an
// empty string if the CPU name is not known.
func (c *Config) CPU() string {
return c.Target.CPU
}
// The current build mode (like the `-buildmode` command line flag).
func (c *Config) BuildMode() string {
if c.Options.BuildMode != "" {
return c.Options.BuildMode
}
if c.Target.BuildMode != "" {
return c.Target.BuildMode
}
return "default"
}
// Features returns a list of features this CPU supports. For example, for a
// RISC-V processor, that could be "+a,+c,+m". For many targets, an empty list
// will be returned.
func (c *Config) Features() string {
if c.Target.Features == "" {
return c.Options.LLVMFeatures
}
if c.Options.LLVMFeatures == "" {
return c.Target.Features
}
return c.Target.Features + "," + c.Options.LLVMFeatures
}
// ABI returns the -mabi= flag for this target (like -mabi=lp64). A zero-length
// string is returned if the target doesn't specify an ABI.
func (c *Config) ABI() string {
return c.Target.ABI
}
// GOOS returns the GOOS of the target. This might not always be the actual OS:
// for example, bare-metal targets will usually pretend to be linux to get the
// standard library to compile.
func (c *Config) GOOS() string {
return c.Target.GOOS
}
// GOARCH returns the GOARCH of the target. This might not always be the actual
// architecture: for example, the AVR target is not supported by the Go standard
// library so such targets will usually pretend to be linux/arm.
func (c *Config) GOARCH() string {
return c.Target.GOARCH
}
// GOARM will return the GOARM environment variable given to the compiler when
// building a program.
func (c *Config) GOARM() string {
return c.Options.GOARM
}
// GOMIPS will return the GOMIPS environment variable given to the compiler when
// building a program.
func (c *Config) GOMIPS() string {
return c.Options.GOMIPS
}
// BuildTags returns the complete list of build tags used during this build.
func (c *Config) BuildTags() []string {
tags := append([]string(nil), c.Target.BuildTags...) // copy slice (avoid a race)
tags = append(tags, []string{
"tinygo", // that's the compiler
"purego", // to get various crypto packages to work
"osusergo", // to get os/user to work
"math_big_pure_go", // to get math/big to work
"gc." + c.GC(), "scheduler." + c.Scheduler(), // used inside the runtime package
"serial." + c.Serial()}...) // used inside the machine package
for i := 1; i <= c.GoMinorVersion; i++ {
tags = append(tags, fmt.Sprintf("go1.%d", i))
}
tags = append(tags, c.Options.Tags...)
return tags
}
// GC returns the garbage collection strategy in use on this platform. Valid
// values are "none", "leaking", "conservative" and "precise".
func (c *Config) GC() string {
if c.Options.GC != "" {
return c.Options.GC
}
if c.Target.GC != "" {
return c.Target.GC
}
return "conservative"
}
// NeedsStackObjects returns true if the compiler should insert stack objects
// that can be traced by the garbage collector.
func (c *Config) NeedsStackObjects() bool {
switch c.GC() {
case "conservative", "custom", "precise":
for _, tag := range c.BuildTags() {
if tag == "tinygo.wasm" {
return true
}
}
return false
default:
return false
}
}
// Scheduler returns the scheduler implementation. Valid values are "none",
// "asyncify" and "tasks".
func (c *Config) Scheduler() string {
if c.Options.Scheduler != "" {
return c.Options.Scheduler
}
if c.Target.Scheduler != "" {
return c.Target.Scheduler
}
// Fall back to none.
return "none"
}
// Serial returns the serial implementation for this build configuration: uart,
// usb (meaning USB-CDC), or none.
func (c *Config) Serial() string {
if c.Options.Serial != "" {
return c.Options.Serial
}
if c.Target.Serial != "" {
return c.Target.Serial
}
return "none"
}
// OptLevels returns the optimization level (0-2), size level (0-2), and inliner
// threshold as used in the LLVM optimization pipeline.
func (c *Config) OptLevel() (level string, speedLevel, sizeLevel int) {
switch c.Options.Opt {
case "none", "0":
return "O0", 0, 0
case "1":
return "O1", 1, 0
case "2":
return "O2", 2, 0
case "s":
return "Os", 2, 1
case "z":
return "Oz", 2, 2 // default
default:
// This is not shown to the user: valid choices are already checked as
// part of Options.Verify(). It is here as a sanity check.
panic("unknown optimization level: -opt=" + c.Options.Opt)
}
}
// PanicStrategy returns the panic strategy selected for this target. Valid
// values are "print" (print the panic value, then exit) or "trap" (issue a trap
// instruction).
func (c *Config) PanicStrategy() string {
return c.Options.PanicStrategy
}
// AutomaticStackSize returns whether goroutine stack sizes should be determined
// automatically at compile time, if possible. If it is false, no attempt is
// made.
func (c *Config) AutomaticStackSize() bool {
if c.Target.AutoStackSize != nil && c.Scheduler() == "tasks" {
return *c.Target.AutoStackSize
}
return false
}
// StackSize returns the default stack size to be used for goroutines, if the
// stack size could not be determined automatically at compile time.
func (c *Config) StackSize() uint64 {
if c.Options.StackSize != 0 {
return c.Options.StackSize
}
return c.Target.DefaultStackSize
}
// MaxStackAlloc returns the size of the maximum allocation to put on the stack vs heap.
func (c *Config) MaxStackAlloc() uint64 {
if c.StackSize() > 32*1024 {
return 1024
}
return 256
}
// RP2040BootPatch returns whether the RP2040 boot patch should be applied that
// calculates and patches in the checksum for the 2nd stage bootloader.
func (c *Config) RP2040BootPatch() bool {
if c.Target.RP2040BootPatch != nil {
return *c.Target.RP2040BootPatch
}
return false
}
// Return a canonicalized architecture name, so we don't have to deal with arm*
// vs thumb* vs arm64.
func CanonicalArchName(triple string) string {
arch := strings.Split(triple, "-")[0]
if arch == "arm64" {
return "aarch64"
}
if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
return "arm"
}
if arch == "mipsel" {
return "mips"
}
return arch
}
// MuslArchitecture returns the architecture name as used in musl libc. It is
// usually the same as the first part of the LLVM triple, but not always.
func MuslArchitecture(triple string) string {
return CanonicalArchName(triple)
}
// LibcPath returns the path to the libc directory. The libc path will be either
// a precompiled libc shipped with a TinyGo build, or a libc path in the cache
// directory (which might not yet be built).
func (c *Config) LibcPath(name string) (path string, precompiled bool) {
archname := c.Triple()
if c.CPU() != "" {
archname += "-" + c.CPU()
}
if c.ABI() != "" {
archname += "-" + c.ABI()
}
if c.Target.SoftFloat {
archname += "-softfloat"
}
// Try to load a precompiled library.
precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
if _, err := os.Stat(precompiledDir); err == nil {
// Found a precompiled library for this OS/architecture. Return the path
// directly.
return precompiledDir, true
}
// No precompiled library found. Determine the path name that will be used
// in the build cache.
return filepath.Join(goenv.Get("GOCACHE"), name+"-"+archname), false
}
// DefaultBinaryExtension returns the default extension for binaries, such as
// .exe, .wasm, or no extension (depending on the target).
func (c *Config) DefaultBinaryExtension() string {
parts := strings.Split(c.Triple(), "-")
if parts[0] == "wasm32" {
// WebAssembly files always have the .wasm file extension.
return ".wasm"
}
if len(parts) >= 3 && parts[2] == "windows" {
// Windows uses .exe.
return ".exe"
}
if len(parts) >= 3 && parts[2] == "unknown" {
// There appears to be a convention to use the .elf file extension for
// ELF files intended for microcontrollers. I'm not aware of the origin
// of this, it's just something that is used by many projects.
// I think it's a good tradition, so let's keep it.
return ".elf"
}
// Linux, MacOS, etc, don't use a file extension. Use it as a fallback.
return ""
}
// CFlags returns the flags to pass to the C compiler. This is necessary for CGo
// preprocessing.
func (c *Config) CFlags(libclang bool) []string {
var cflags []string
for _, flag := range c.Target.CFlags {
cflags = append(cflags, strings.ReplaceAll(flag, "{root}", goenv.Get("TINYGOROOT")))
}
resourceDir := goenv.ClangResourceDir(libclang)
if resourceDir != "" {
// The resource directory contains the built-in clang headers like
// stdbool.h, stdint.h, float.h, etc.
// It is left empty if we're using an external compiler (that already
// knows these headers).
cflags = append(cflags,
"-resource-dir="+resourceDir,
)
}
switch c.Target.Libc {
case "darwin-libSystem":
root := goenv.Get("TINYGOROOT")
cflags = append(cflags,
"-nostdlibinc",
"-isystem", filepath.Join(root, "lib/macos-minimal-sdk/src/usr/include"),
)
case "picolibc":
root := goenv.Get("TINYGOROOT")
picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
path, _ := c.LibcPath("picolibc")
cflags = append(cflags,
"-nostdlibinc",
"-isystem", filepath.Join(path, "include"),
"-isystem", filepath.Join(picolibcDir, "include"),
"-isystem", filepath.Join(picolibcDir, "tinystdio"),
"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
)
case "musl":
root := goenv.Get("TINYGOROOT")
path, _ := c.LibcPath("musl")
arch := MuslArchitecture(c.Triple())
cflags = append(cflags,
"-nostdlibinc",
"-isystem", filepath.Join(path, "include"),
"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
"-isystem", filepath.Join(root, "lib", "musl", "arch", "generic"),
"-isystem", filepath.Join(root, "lib", "musl", "include"),
)
case "wasi-libc":
root := goenv.Get("TINYGOROOT")
cflags = append(cflags,
"-nostdlibinc",
"-isystem", root+"/lib/wasi-libc/sysroot/include")
case "wasmbuiltins":
// nothing to add (library is purely for builtins)
case "mingw-w64":
root := goenv.Get("TINYGOROOT")
path, _ := c.LibcPath("mingw-w64")
cflags = append(cflags,
"-nostdlibinc",
"-isystem", filepath.Join(path, "include"),
"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "crt"),
"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "defaults", "include"),
"-D_UCRT",
)
case "":
// No libc specified, nothing to add.
default:
// Incorrect configuration. This could be handled in a better way, but
// usually this will be found by developers (not by TinyGo users).
panic("unknown libc: " + c.Target.Libc)
}
// Always emit debug information. It is optionally stripped at link time.
cflags = append(cflags, "-gdwarf-4")
// Use the same optimization level as TinyGo.
cflags = append(cflags, "-O"+c.Options.Opt)
// Set the LLVM target triple.
cflags = append(cflags, "--target="+c.Triple())
// Set the -mcpu (or similar) flag.
if c.Target.CPU != "" {
if c.GOARCH() == "amd64" || c.GOARCH() == "386" {
// x86 prefers the -march flag (-mcpu is deprecated there).
cflags = append(cflags, "-march="+c.Target.CPU)
} else if strings.HasPrefix(c.Triple(), "avr") {
// AVR MCUs use -mmcu instead of -mcpu.
cflags = append(cflags, "-mmcu="+c.Target.CPU)
} else {
// The rest just uses -mcpu.
cflags = append(cflags, "-mcpu="+c.Target.CPU)
}
}
// Set the -mabi flag, if needed.
if c.ABI() != "" {
cflags = append(cflags, "-mabi="+c.ABI())
}
return cflags
}
// LDFlags returns the flags to pass to the linker. A few more flags are needed
// (like the one for the compiler runtime), but this represents the majority of
// the flags.
func (c *Config) LDFlags() []string {
root := goenv.Get("TINYGOROOT")
// Merge and adjust LDFlags.
var ldflags []string
for _, flag := range c.Target.LDFlags {
ldflags = append(ldflags, strings.ReplaceAll(flag, "{root}", root))
}
ldflags = append(ldflags, "-L", root)
if c.Target.LinkerScript != "" {
ldflags = append(ldflags, "-T", c.Target.LinkerScript)
}
ldflags = append(ldflags, c.Options.ExtLDFlags...)
return ldflags
}
// ExtraFiles returns the list of extra files to be built and linked with the
// executable. This can include extra C and assembly files.
func (c *Config) ExtraFiles() []string {
return c.Target.ExtraFiles
}
// DumpSSA returns whether to dump Go SSA while compiling (-dumpssa flag). Only
// enable this for debugging.
func (c *Config) DumpSSA() bool {
return c.Options.DumpSSA
}
// VerifyIR returns whether to run extra checks on the IR. This is normally
// disabled but enabled during testing.
func (c *Config) VerifyIR() bool {
return c.Options.VerifyIR
}
// Debug returns whether debug (DWARF) information should be retained by the
// linker. By default, debug information is retained, but it can be removed
// with the -no-debug flag.
func (c *Config) Debug() bool {
return c.Options.Debug
}
// BinaryFormat returns an appropriate binary format, based on the file
// extension and the configured binary format in the target JSON file.
func (c *Config) BinaryFormat(ext string) string {
switch ext {
case ".bin", ".gba", ".nro":
// The simplest format possible: dump everything in a raw binary file.
if c.Target.BinaryFormat != "" {
return c.Target.BinaryFormat
}
return "bin"
case ".img":
// Image file. Only defined for the ESP32 at the moment, where it is a
// full (runnable) image that can be used in the Espressif QEMU fork.
if c.Target.BinaryFormat != "" {
return c.Target.BinaryFormat + "-img"
}
return "bin"
case ".hex":
// Similar to bin, but includes the start address and is thus usually a
// better format.
return "hex"
case ".uf2":
// Special purpose firmware format, mainly used on Adafruit boards.
// More information:
// https://github.com/Microsoft/uf2
return "uf2"
case ".zip":
if c.Target.BinaryFormat != "" {
return c.Target.BinaryFormat
}
return "zip"
default:
// Use the ELF format for unrecognized file formats.
return "elf"
}
}
// Programmer returns the flash method and OpenOCD interface name given a
// particular configuration. It may either be all configured in the target JSON
// file or be modified using the -programmer command-line option.
func (c *Config) Programmer() (method, openocdInterface string) {
switch c.Options.Programmer {
case "":
// No configuration supplied.
return c.Target.FlashMethod, c.Target.OpenOCDInterface
case "openocd", "msd", "command":
// The -programmer flag only specifies the flash method.
return c.Options.Programmer, c.Target.OpenOCDInterface
case "bmp":
// The -programmer flag only specifies the flash method.
return c.Options.Programmer, ""
default:
// The -programmer flag specifies something else, assume it specifies
// the OpenOCD interface name.
return "openocd", c.Options.Programmer
}
}
// OpenOCDConfiguration returns a list of command line arguments to OpenOCD.
// This list of command-line arguments is based on the various OpenOCD-related
// flags in the target specification.
func (c *Config) OpenOCDConfiguration() (args []string, err error) {
_, openocdInterface := c.Programmer()
if openocdInterface == "" {
return nil, errors.New("OpenOCD programmer not set")
}
if !regexp.MustCompile(`^[\p{L}0-9_-]+$`).MatchString(openocdInterface) {
return nil, fmt.Errorf("OpenOCD programmer has an invalid name: %#v", openocdInterface)
}
if c.Target.OpenOCDTarget == "" {
return nil, errors.New("OpenOCD chip not set")
}
if !regexp.MustCompile(`^[\p{L}0-9_-]+$`).MatchString(c.Target.OpenOCDTarget) {
return nil, fmt.Errorf("OpenOCD target has an invalid name: %#v", c.Target.OpenOCDTarget)
}
if c.Target.OpenOCDTransport != "" && c.Target.OpenOCDTransport != "swd" {
return nil, fmt.Errorf("unknown OpenOCD transport: %#v", c.Target.OpenOCDTransport)
}
args = []string{"-f", "interface/" + openocdInterface + ".cfg"}
if c.Target.OpenOCDTransport != "" {
transport := c.Target.OpenOCDTransport
if transport == "swd" {
switch openocdInterface {
case "stlink-dap":
transport = "dapdirect_swd"
}
}
args = append(args, "-c", "transport select "+transport)
}
args = append(args, "-f", "target/"+c.Target.OpenOCDTarget+".cfg")
for _, cmd := range c.Target.OpenOCDCommands {
args = append(args, "-c", cmd)
}
return args, nil
}
// CodeModel returns the code model used on this platform.
func (c *Config) CodeModel() string {
if c.Target.CodeModel != "" {
return c.Target.CodeModel
}
return "default"
}
// RelocationModel returns the relocation model in use on this platform. Valid
// values are "static", "pic", "dynamicnopic".
func (c *Config) RelocationModel() string {
if c.Target.RelocationModel != "" {
return c.Target.RelocationModel
}
return "static"
}
// EmulatorName is a shorthand to get the command for this emulator, something
// like qemu-system-arm or simavr.
func (c *Config) EmulatorName() string {
parts := strings.SplitN(c.Target.Emulator, " ", 2)
if len(parts) > 1 {
return parts[0]
}
return ""
}
// EmulatorFormat returns the binary format for the emulator and the associated
// file extension. An empty string means to pass directly whatever the linker
// produces directly without conversion (usually ELF format).
func (c *Config) EmulatorFormat() (format, fileExt string) {
switch {
case strings.Contains(c.Target.Emulator, "{img}"):
return "img", ".img"
default:
return "", ""
}
}
// Emulator returns a ready-to-run command to run the given binary in an
// emulator. Give it the format (returned by EmulatorFormat()) and the path to
// the compiled binary.
func (c *Config) Emulator(format, binary string) ([]string, error) {
parts, err := shlex.Split(c.Target.Emulator)
if err != nil {
return nil, fmt.Errorf("could not parse emulator command: %w", err)
}
var emulator []string
for _, s := range parts {
s = strings.ReplaceAll(s, "{root}", goenv.Get("TINYGOROOT"))
// Allow replacement of what's usually /tmp except notably Windows.
s = strings.ReplaceAll(s, "{tmpDir}", os.TempDir())
s = strings.ReplaceAll(s, "{"+format+"}", binary)
emulator = append(emulator, s)
}
return emulator, nil
}
type TestConfig struct {
CompileTestBinary bool
CompileOnly bool
Verbose bool
Short bool
RunRegexp string
SkipRegexp string
Count *int
BenchRegexp string
BenchTime string
BenchMem bool
Shuffle string
}
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