Do code cleanup use duff device linenoise i/o

This commit is contained in:
Justine Tunney 2022-04-22 18:55:28 -07:00
parent 6ff46ca373
commit 2f56ebfe78
79 changed files with 1393 additions and 1484 deletions

View file

@ -1,187 +0,0 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
*/
#include "libc/alg/alg.h"
#include "libc/alg/bisectcarleft.internal.h"
#include "libc/bits/safemacros.internal.h"
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/strace.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/fmt.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/kprintf.h"
#include "libc/log/backtrace.internal.h"
#include "libc/log/color.internal.h"
#include "libc/log/libfatal.internal.h"
#include "libc/log/log.h"
#include "libc/nexgen32e/gc.internal.h"
#include "libc/runtime/gc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/stdio/append.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/sig.h"
#include "libc/x/x.h"
#define kBacktraceMaxFrames 128
#define kBacktraceBufSize ((kBacktraceMaxFrames - 1) * (18 + 1))
static void ShowHint(const char *s) {
kprintf("%snote: %s%s%n", SUBTLE, s, RESET);
}
static int PrintBacktraceUsingAddr2line(int fd, const struct StackFrame *bp) {
ssize_t got;
intptr_t addr;
size_t i, j, gi;
int ws, pid, pipefds[2];
struct Garbages *garbage;
sigset_t chldmask, savemask;
const struct StackFrame *frame;
char *debugbin, *p1, *p2, *p3, *addr2line;
char buf[kBacktraceBufSize], *argv[kBacktraceMaxFrames];
if (!(debugbin = FindDebugBinary())) {
return -1;
}
if (!(addr2line = GetAddr2linePath())) {
if (IsLinux()) {
ShowHint("can't find addr2line on path or in ADDR2LINE");
}
return -1;
}
/*
* DWARF is a weak standard. Platforms that use LLVM or old GNU
* usually can't be counted upon to print backtraces correctly.
*/
if (!IsLinux() && !IsWindows()) {
ShowHint("won't print addr2line backtrace because probably llvm");
return -1;
}
i = 0;
j = 0;
argv[i++] = "addr2line";
argv[i++] = "-a"; /* filter out w/ shell script wrapper for old versions */
argv[i++] = "-pCife";
argv[i++] = debugbin;
garbage = weaken(__garbage);
gi = garbage ? garbage->i : 0;
for (frame = bp; frame && i < kBacktraceMaxFrames - 1; frame = frame->next) {
if (!IsValidStackFramePointer(frame)) {
return -1;
}
addr = frame->addr;
if (addr == weakaddr("__gc")) {
do {
--gi;
} while ((addr = garbage->p[gi].ret) == weakaddr("__gc"));
}
argv[i++] = buf + j;
buf[j++] = '0';
buf[j++] = 'x';
j += uint64toarray_radix16(addr, buf + j) + 1;
}
argv[i++] = NULL;
sigemptyset(&chldmask);
sigaddset(&chldmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &chldmask, &savemask);
pipe(pipefds);
if (!(pid = vfork())) {
sigprocmask(SIG_SETMASK, &savemask, NULL);
dup2(pipefds[1], 1);
if (pipefds[0] != 1) close(pipefds[0]);
if (pipefds[1] != 1) close(pipefds[1]);
execvp(addr2line, argv);
_exit(127);
}
close(pipefds[1]);
while ((got = read(pipefds[0], buf, kBacktraceBufSize)) > 0) {
p1 = buf;
p3 = p1 + got;
/*
* remove racist output from gnu tooling, that can't be disabled
* otherwise, since it breaks other tools like emacs that aren't
* equipped to ignore it, and what's most problematic is that
* addr2line somehow manages to put the racism onto the one line
* in the backtrace we actually care about.
*/
for (got = p3 - buf, p1 = buf; got;) {
if ((p2 = memmem(p1, got, " (discriminator ",
strlen(" (discriminator ") - 1)) &&
(p3 = memchr(p2, '\n', got - (p2 - p1)))) {
if (p3 > p2 && p3[-1] == '\r') --p3;
__write(p1, p2 - p1);
got -= p3 - p1;
p1 += p3 - p1;
} else {
__write(p1, got);
break;
}
}
}
close(pipefds[0]);
while (waitpid(pid, &ws, 0) == -1) {
if (errno == EINTR) continue;
return -1;
}
sigprocmask(SIG_SETMASK, &savemask, NULL);
if (WIFEXITED(ws) && !WEXITSTATUS(ws)) {
return 0;
} else {
return -1;
}
}
static int PrintBacktrace(int fd, const struct StackFrame *bp) {
if (!IsTiny() && !__isworker) {
if (PrintBacktraceUsingAddr2line(fd, bp) != -1) {
return 0;
}
}
return PrintBacktraceUsingSymbols(fd, bp, GetSymbolTable());
}
void ShowBacktrace(int fd, const struct StackFrame *bp) {
#ifdef __FNO_OMIT_FRAME_POINTER__
/* asan runtime depends on this function */
int st, ft;
st = __strace, __strace = 0;
ft = g_ftrace, g_ftrace = 0;
if (!bp) bp = __builtin_frame_address(0);
PrintBacktrace(fd, bp);
__strace = st;
g_ftrace = ft;
#else
kprintf("ShowBacktrace() needs these flags to show C backtrace:%n"
"\t-D__FNO_OMIT_FRAME_POINTER__%n"
"\t-fno-omit-frame-pointer%n");
#endif
}