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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
40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
#ifndef COSMOPOLITAN_LIBC_TESTLIB_UGLY_H_
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#define COSMOPOLITAN_LIBC_TESTLIB_UGLY_H_
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#include "libc/macros.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#if defined(__GNUC__) || defined(__llvm__)
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#pragma GCC diagnostic ignored "-Wpointer-to-int-cast" /* j.f.c. */
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#endif
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#define _I(x) (TYPE_SIGNED(typeof(x)) ? (intmax_t)(x) : (uintmax_t)(x))
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#define __TEST_ARRAY(S) \
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_Section(".piro.relo.sort.testcase.2." #S ",\"aw\",@init_array #")
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#define __BENCH_ARRAY(S) \
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_Section(".piro.relo.sort.bench.2." #S ",\"aw\",@init_array #")
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#define __TEST_PROTOTYPE(S, N, A, K) \
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testonly void S##_##N(void); \
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alignas(8) const void *const S##_##N##_ptr[] A(S) = {S##_##N}; \
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testonly K void S##_##N(void)
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#define __TEST_SECTION(NAME, CONTENT) \
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".section " NAME "\n" CONTENT "\n\t.previous\n"
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#define __RELOSECTION(NAME, CONTENT) \
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__TEST_SECTION(".piro.relo.sort" NAME ",\"aw\",@progbits", CONTENT)
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#define __ROSTR(STR) __TEST_SECTION(".rodata.str1.1,\"aSM\",@progbits,1", STR)
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#define __FIXTURE(KIND, GROUP, ENTRY) \
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asm(__RELOSECTION("." KIND ".2." #GROUP #ENTRY, \
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"\t.quad\t1f\n" \
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"\t.quad\t2f\n" \
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"\t.quad\t" STRINGIFY(GROUP##_##ENTRY)) \
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__ROSTR("1:\t.asciz\t" STRINGIFY(#GROUP)) \
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__ROSTR("2:\t.asciz\t" STRINGIFY(#ENTRY))); \
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testonly void GROUP##_##ENTRY(void)
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_TESTLIB_UGLY_H_ */
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