116 lines
2.8 KiB
TypeScript
116 lines
2.8 KiB
TypeScript
import child_process from "child_process"
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import { PlatformPath } from "path"
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import path from "path"
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// FIXME: these imports basically looks ugly.
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import { LLVM_EXTRACT, PREFIX, SYSROOT_PREFIX, FLANG } from "./environment";
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/**
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* Helper function to generate output options for the linker.
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* @param exe Executable file name.
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* @returns Array of options to be passed to the linker.
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*/
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function driverOutput(exe: string): string[] {
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return ["-o", exe];
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}
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export function functionList(module: string) {
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let result: string[] = [];
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// Split the LLVM module string by lines
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const lines = module.split('\n')
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lines.forEach(line => {
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if (line.startsWith('define')) {
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let begin = line.indexOf('@');
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let end = line.indexOf('(');
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result.push(line.substring(begin + 1, end).trim());
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}
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});
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return result;
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}
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/**
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* CLI options used for llvm-extract executable.
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*/
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export interface ExtractOptions {
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/**
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* Functions to extract.
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*/
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func?: string[]
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/**
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* Basic block specifiers.
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*/
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bb?: string[]
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output?: string
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/**
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* Input file name. If unspecified, llvm-extract reads from stdin
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*/
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input?: string
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asm?: boolean
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}
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export function extractCommand(options: ExtractOptions): string[] {
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return [
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...(options.func ?? []).flatMap(name => ["--func", name]),
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...(options.bb ?? []).flatMap(name => ["--bb", name]),
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...(options.output ? ["-o", options.output] : []),
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...(options.asm ? ["-S"] : []),
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...(options.input ? [options.input] : [])
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];
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}
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/**
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* Extract one function using llvm-extract
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*/
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export async function extract(options: ExtractOptions) {
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let process = child_process.spawn(
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LLVM_EXTRACT,
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extractCommand(options),
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{ stdio: "inherit" }
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)
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const exitcode = await new Promise((resolve, reject) => { process.on('close', resolve) })
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return exitcode
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}
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/**
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* Links objects into an executable using specified environment variables and paths.
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* @param objects Array of object files to link.
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* @param exe Executable file name.
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*/
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export async function link(objects: string[], exe: string) {
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// Set up environment variables
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const linkenv = { ...process.env };
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linkenv.LD_LIBRARY_PATH = [
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path.join(PREFIX, 'lib'),
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path.join(SYSROOT_PREFIX, 'lib'),
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path.join(SYSROOT_PREFIX, 'usr', 'lib')
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].join(':');
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// Construct link command
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const linkcmd = [
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FLANG,
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...objects,
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"-L", path.join(PREFIX, 'lib'),
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// TODO: Implement rpath logic here if needed
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...driverOutput(exe)
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];
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// Execute the link command
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child_process.spawn(linkcmd[0], linkcmd.slice(1), {
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stdio: 'inherit',
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env: linkenv
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});
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return new Promise((resolve, reject) => { process.on('close', resolve) })
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}
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