mirror of
https://github.com/jart/cosmopolitan.git
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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
130 lines
5 KiB
C
130 lines
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 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/ucontext.h"
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#include "libc/dce.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/mem/gc.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/append.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/nr.h"
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#include "libc/testlib/testlib.h"
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#define Z 0x5555555555555555
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#define FLAGS_cf 0
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#define FLAGS_pf 2
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#define FLAGS_sf 7
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#define FLAGS_of 11
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intptr_t diagnose_syscall(intptr_t nr, //
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intptr_t arg1, //
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intptr_t arg2, //
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intptr_t arg3, //
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intptr_t arg4, //
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intptr_t arg5, //
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intptr_t arg6, //
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intptr_t arg7, //
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ucontext_t *before, //
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ucontext_t *after); //
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#define GREG(FIELD) \
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do { \
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uint64_t f1 = x->uc_mcontext.FIELD; \
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uint64_t f2 = y->uc_mcontext.FIELD; \
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if (f1 != f2) { \
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if (b) appendw(&b, ' '); \
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appends(&b, #FIELD); \
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kprintf("%3s %016lx → %016lx\n", #FIELD, f1, f2); \
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} \
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} while (0)
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#define FLAG(FLAG) \
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if ((x->uc_mcontext.eflags & (1ul << FLAGS_##FLAG)) ^ \
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(y->uc_mcontext.eflags & (1ul << FLAGS_##FLAG))) { \
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if (b) appendw(&b, ' '); \
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appends(&b, #FLAG); \
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}
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char *DiffContexts(ucontext_t *x, ucontext_t *y) {
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char *b = 0;
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GREG(rax);
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GREG(rdx);
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GREG(rdi);
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GREG(rsi);
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GREG(rcx);
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GREG(r8);
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GREG(r9);
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GREG(r10);
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GREG(r11);
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GREG(r12);
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GREG(r13);
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GREG(r14);
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GREG(r15);
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GREG(rbx);
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GREG(rbp);
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FLAG(cf);
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FLAG(sf);
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FLAG(of);
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FLAG(pf);
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return b;
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}
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void SetUp(void) {
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if (IsWindows()) {
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exit(0);
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}
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}
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TEST(diagnose_syscall, getpid) {
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ucontext_t x, y;
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diagnose_syscall(__NR_getpid, Z, Z, Z, Z, Z, Z, Z, &x, &y);
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if (IsFreebsd()) {
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ASSERT_STREQ("rax rcx r8 r9 r10 r11", _gc(DiffContexts(&x, &y)));
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} else if (IsNetbsd() || IsXnu()) {
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// netbsd puts parent pid in edx
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// xnu seems to just clobber it!
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ASSERT_STREQ("rax rdx rcx r11", _gc(DiffContexts(&x, &y)));
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} else {
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ASSERT_STREQ("rax rcx r11", _gc(DiffContexts(&x, &y)));
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}
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}
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TEST(diagnose_syscall, testWriteSuccess) {
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ucontext_t x, y;
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diagnose_syscall(__NR_write, 2, Z, 0, Z, Z, Z, Z, &x, &y);
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if (IsFreebsd()) {
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ASSERT_STREQ("rax rcx r8 r9 r10 r11", _gc(DiffContexts(&x, &y)));
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} else {
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ASSERT_STREQ("rax rcx r11", _gc(DiffContexts(&x, &y)));
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}
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}
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TEST(diagnose_syscall, testWriteFailed) {
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ucontext_t x, y;
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diagnose_syscall(__NR_write, -1, Z, Z, Z, Z, Z, Z, &x, &y);
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if (IsFreebsd()) {
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ASSERT_STREQ("rax rcx r8 r9 r10 r11 cf", _gc(DiffContexts(&x, &y)));
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} else if (IsBsd()) {
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ASSERT_STREQ("rax rcx r11 cf", _gc(DiffContexts(&x, &y)));
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} else {
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ASSERT_STREQ("rax rcx r11", _gc(DiffContexts(&x, &y)));
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}
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}
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