mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-12 09:17:53 +00:00
8c645fa1ee
It's now possible to create thousands of thousands of sparse independent memory mappings, without any slowdown. The memory manager is better with tracking memory protection now, particularly on Windows in a precise way that can be restored during fork(). You now have the highest quality mem manager possible. It's even better than some OSes like XNU, where mmap() is implemented as an O(n) operation which means sadly things aren't much improved over there. With this change the llamafile HTTP server endpoint at /tokenize with a prompt of 50 tokens is now able to handle 2.6m r/sec
294 lines
9.6 KiB
C
294 lines
9.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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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│ 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/assert.h"
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#include "libc/atomic.h"
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#include "libc/calls/blockcancel.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/state.internal.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/struct/siginfo.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/struct/ucontext.internal.h"
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#include "libc/calls/struct/utsname.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/ucontext.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/describebacktrace.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/log/backtrace.internal.h"
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#include "libc/log/gdb.h"
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#include "libc/log/internal.h"
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#include "libc/log/log.h"
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#include "libc/macros.internal.h"
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#include "libc/math.h"
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#include "libc/mem/alloca.h"
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#include "libc/nexgen32e/stackframe.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/pc.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/stack.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/auxv.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/thread/thread.h"
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#include "libc/thread/tls.h"
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#ifdef __x86_64__
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#define STACK_ERROR "error: not enough room on stack to print crash report\n"
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static const char kGregOrder[17] forcealign(1) = {
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13, 11, 8, 14, 12, 9, 10, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7,
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};
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static const char kGregNames[17][4] forcealign(1) = {
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"R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15", "RDI",
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"RSI", "RBP", "RBX", "RDX", "RAX", "RCX", "RSP", "RIP",
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};
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static const char kCpuFlags[12] forcealign(1) = "CVPRAKZSTIDO";
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static const char kFpuExceptions[6] forcealign(1) = "IDZOUP";
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relegated static void ShowFunctionCalls(ucontext_t *ctx) {
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kprintf(
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"cosmoaddr2line %s %lx %s\n\n", FindDebugBinary(),
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ctx ? ctx->uc_mcontext.PC : 0,
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DescribeBacktrace(ctx ? (struct StackFrame *)ctx->uc_mcontext.BP
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: (struct StackFrame *)__builtin_frame_address(0)));
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ShowBacktrace(2, &(struct StackFrame){
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.next = (struct StackFrame *)ctx->uc_mcontext.rbp,
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.addr = ctx->uc_mcontext.rip,
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});
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}
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relegated static char *AddFlag(char *p, int b, const char *s) {
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if (b) {
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p = stpcpy(p, s);
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} else {
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*p = 0;
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}
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return p;
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}
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relegated static dontinline char *DescribeCpuFlags(char *p, int flags,
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int x87sw, int mxcsr) {
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unsigned i;
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for (i = 0; i < ARRAYLEN(kCpuFlags); ++i) {
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if (flags & 1) {
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*p++ = ' ';
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*p++ = kCpuFlags[i];
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*p++ = 'F';
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}
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flags >>= 1;
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}
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for (i = 0; i < ARRAYLEN(kFpuExceptions); ++i) {
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if ((x87sw | mxcsr) & (1 << i)) {
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*p++ = ' ';
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*p++ = kFpuExceptions[i];
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*p++ = 'E';
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}
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}
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p = AddFlag(p, x87sw & FPU_SF, " SF");
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p = AddFlag(p, x87sw & FPU_C0, " C0");
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p = AddFlag(p, x87sw & FPU_C1, " C1");
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p = AddFlag(p, x87sw & FPU_C2, " C2");
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p = AddFlag(p, x87sw & FPU_C3, " C3");
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return p;
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}
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static char *HexCpy(char p[hasatleast 17], uint64_t x, uint8_t k) {
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while (k > 0)
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*p++ = "0123456789abcdef"[(x >> (k -= 4)) & 15];
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*p = '\0';
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return p;
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}
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relegated static char *ShowGeneralRegisters(char *p, ucontext_t *ctx) {
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size_t i, j;
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const char *s;
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*p++ = '\n';
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for (i = 0, j = 0; i < ARRAYLEN(kGregNames); ++i) {
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if (j > 0)
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*p++ = ' ';
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if (!(s = kGregNames[(unsigned)kGregOrder[i]])[2])
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*p++ = ' ';
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p = stpcpy(p, s), *p++ = ' ';
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p = HexCpy(p, ctx->uc_mcontext.gregs[(unsigned)kGregOrder[i]], 64);
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if (++j == 3) {
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j = 0;
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*p++ = '\n';
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}
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}
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DescribeCpuFlags(
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p, ctx->uc_mcontext.eflags,
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ctx->uc_mcontext.fpregs ? ctx->uc_mcontext.fpregs->swd : 0,
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ctx->uc_mcontext.fpregs ? ctx->uc_mcontext.fpregs->mxcsr : 0);
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*p++ = '\n';
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p = stpcpy(p, "TLS ");
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p = HexCpy(p, (long)__get_tls(), 64);
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*p++ = '\n';
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return p;
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}
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relegated static char *ShowSseRegisters(char *p, ucontext_t *ctx) {
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size_t i;
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if (ctx->uc_mcontext.fpregs) {
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*p++ = '\n';
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for (i = 0; i < 8; ++i) {
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*p++ = 'X';
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*p++ = 'M';
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*p++ = 'M';
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if (i >= 10) {
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*p++ = i / 10 + '0';
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*p++ = i % 10 + '0';
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} else {
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*p++ = i + '0';
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*p++ = ' ';
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}
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*p++ = ' ';
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p = HexCpy(p, ctx->uc_mcontext.fpregs->xmm[i + 0].u64[1], 64);
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p = HexCpy(p, ctx->uc_mcontext.fpregs->xmm[i + 0].u64[0], 64);
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p = stpcpy(p, " XMM");
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if (i + 8 >= 10) {
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*p++ = (i + 8) / 10 + '0';
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*p++ = (i + 8) % 10 + '0';
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} else {
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*p++ = (i + 8) + '0';
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*p++ = ' ';
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}
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*p++ = ' ';
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p = HexCpy(p, ctx->uc_mcontext.fpregs->xmm[i + 8].u64[1], 64);
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p = HexCpy(p, ctx->uc_mcontext.fpregs->xmm[i + 8].u64[0], 64);
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*p++ = '\n';
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}
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}
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return p;
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}
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void ShowCrashReportHook(int, int, int, siginfo_t *, ucontext_t *);
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static relegated void ShowCrashReport(int err, int sig, siginfo_t *si,
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ucontext_t *ctx) {
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#pragma GCC push_options
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#pragma GCC diagnostic ignored "-Walloca-larger-than="
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long size = __get_safe_size(8192, 4096);
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if (size < 6000) {
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klog(STACK_ERROR, sizeof(STACK_ERROR) - 1);
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__minicrash(sig, si, ctx);
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return;
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}
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char *buf = alloca(size);
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CheckLargeStackAllocation(buf, size);
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#pragma GCC pop_options
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int i;
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char *p = buf;
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char host[64];
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struct utsname names;
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if (_weaken(ShowCrashReportHook)) {
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ShowCrashReportHook(2, err, sig, si, ctx);
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}
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names.sysname[0] = 0;
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names.release[0] = 0;
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names.version[0] = 0;
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names.nodename[0] = 0;
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stpcpy(host, "unknown");
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gethostname(host, sizeof(host));
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uname(&names);
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errno = err;
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// TODO(jart): Buffer the WHOLE crash report with backtrace for atomic write.
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p +=
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ksnprintf(p, 4000,
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"\n%serror%s: Uncaught %G (%s) at %p on %s pid %d tid %d\n"
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" %s\n"
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" %s\n"
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" %s %s %s %s\n",
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!__nocolor ? "\e[30;101m" : "", !__nocolor ? "\e[0m" : "", sig,
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__is_stack_overflow(si, ctx) ? "\e[7mStack Overflow\e[0m"
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: DescribeSiCode(sig, si->si_code),
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si->si_addr, host, getpid(), gettid(), program_invocation_name,
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strerror(err), names.sysname, names.version, names.nodename,
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names.release);
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if (ctx) {
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p = ShowGeneralRegisters(p, ctx);
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p = ShowSseRegisters(p, ctx);
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*p++ = '\n';
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klog(buf, p - buf);
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ShowFunctionCalls(ctx);
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} else {
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*p++ = '\n';
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klog(buf, p - buf);
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}
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kprintf("\n");
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__print_maps(15);
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if (__argv)
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for (i = 0; i < __argc; ++i)
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kprintf("%s ", __argv[i]);
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kprintf("\n");
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}
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static inline void SpinLock(atomic_uint *lock) {
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int x;
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for (;;) {
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x = atomic_exchange_explicit(lock, 1, memory_order_acquire);
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if (!x)
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break;
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}
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}
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static inline void SpinUnlock(atomic_uint *lock) {
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atomic_store_explicit(lock, 0, memory_order_release);
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}
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relegated void __oncrash(int sig, siginfo_t *si, void *arg) {
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static atomic_uint lock;
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ftrace_enabled(-1);
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strace_enabled(-1);
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BLOCK_CANCELATION;
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SpinLock(&lock);
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int err = errno;
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__restore_tty();
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ShowCrashReport(err, sig, si, arg);
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// ensure execution doesn't resume for anything but SIGTRAP / SIGQUIT
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if (arg && sig != SIGTRAP && sig != SIGQUIT) {
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if (!IsXnu()) {
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sigaddset(&((ucontext_t *)arg)->uc_sigmask, sig);
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} else {
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sigdelset(&((ucontext_t *)arg)->uc_sigmask, sig);
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struct sigaction sa;
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sigemptyset(&sa.sa_mask);
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sa.sa_handler = SIG_DFL;
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sa.sa_flags = 0;
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sigaction(sig, &sa, 0);
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}
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}
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SpinUnlock(&lock);
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ALLOW_CANCELATION;
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strace_enabled(+1);
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ftrace_enabled(+1);
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}
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#endif /* __x86_64__ */
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