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https://github.com/jart/cosmopolitan.git
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f4f4caab0e
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
78 lines
3.5 KiB
C
78 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/bits/weaken.h"
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#include "libc/calls/internal.h"
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#include "libc/errno.h"
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#include "libc/nt/process.h"
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#include "libc/stdio/stdio.h"
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#include "libc/testlib/testlib.h"
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void SetUp(void);
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void TearDown(void);
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void testlib_finish(void) {
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if (g_testlib_failed) {
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fprintf(stderr, "%u / %u %s\n", g_testlib_failed, g_testlib_ran,
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"tests failed");
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}
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}
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noreturn void testlib_abort(void) {
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int rc;
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testlib_finish();
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rc = min(255, g_testlib_failed);
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quick_exit(rc); /* so we don't run __testmemory_fini() */
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unreachable;
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}
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/**
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* Runs all test case functions in sorted order.
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*/
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testonly void testlib_runtestcases(testfn_t *start, testfn_t *end,
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testfn_t warmup) {
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/**
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* getpid() calls are inserted to help visually see tests in traces
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* which can be performed on Linux, FreeBSD, OpenBSD, and XNU:
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*
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* strace -f o/default/test.com |& less
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* truss o/default/test.com |& less
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* ktrace -f trace o/default/test.com </dev/null; kdump -f trace | less
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* dtruss o/default/test.com |& less
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*
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* Test cases are iterable via a decentralized section. Your TEST()
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* macro inserts .testcase.SUITENAME sections into the binary which
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* the linker sorts into an array.
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*
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* @see ape/ape.lds
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*/
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const testfn_t *fn;
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for (fn = start; fn != end; ++fn) {
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if (weaken(SetUp)) weaken(SetUp)();
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errno = 0;
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SetLastError(0);
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getpid$sysv();
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if (warmup) warmup();
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testlib_clearxmmregisters();
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(*fn)();
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getpid$sysv();
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if (weaken(TearDown)) weaken(TearDown)();
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}
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}
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