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https://github.com/jart/cosmopolitan.git
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Improve signal handling and math
- Polyfill ucontext_t on FreeBSD/OpenBSD/NetBSD - Add tests confirming signals can edit CPU state - Work towards supporting ZIP filesystem on bare metal - Add more tinymath unit tests for POSIX conformance - Add X87 and SSE status flags to crash report - Fix some bugs in blinkenlights - Fix llvm build breakage
This commit is contained in:
Justine Tunney
parent
cdc54ea1fd
commit
40291c9db3
109 changed files with 2316 additions and 520 deletions
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@ -18,6 +18,7 @@
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/sigbits.h"
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#include "libc/calls/struct/siginfo.h"
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#include "libc/calls/struct/utsname.h"
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#include "libc/calls/ucontext.h"
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#include "libc/dce.h"
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@ -32,6 +33,7 @@
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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/memtrack.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/str/str.h"
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#include "libc/sysv/consts/auxv.h"
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@ -39,17 +41,11 @@
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/sig.h"
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STATIC_YOINK("ftoa");
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STATIC_YOINK("ntoa");
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STATIC_YOINK("stoa");
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/**
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* @fileoverview Abnormal termination handling & GUI debugging.
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* @see libc/onkill.c
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*/
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struct siginfo;
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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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@ -59,7 +55,8 @@ static const char kGregNames[17][4] forcealign(1) = {
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"RSI", "RBP", "RBX", "RDX", "RAX", "RCX", "RSP", "RIP",
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};
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static const char kGodHatesFlags[12] forcealign(1) = "CVPRAKZSTIDO";
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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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static const char kCrashSigNames[8][5] forcealign(1) = {
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"QUIT", "FPE", "ILL", "SEGV", "TRAP", "ABRT", "BUS"};
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@ -88,20 +85,36 @@ relegated static void ShowFunctionCalls(int fd, ucontext_t *ctx) {
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}
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}
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relegated static void DescribeCpuFlags(int fd, unsigned flags) {
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relegated static char *AddFlag(char *p, int b, const char *s) {
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if (b) p = stpcpy(p, s);
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return p;
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}
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relegated static void DescribeCpuFlags(int fd, int flags, int x87sw,
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int mxcsr) {
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unsigned i;
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char buf[64], *p;
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p = buf;
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for (i = 0; i < ARRAYLEN(kGodHatesFlags); ++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++ = kGodHatesFlags[i];
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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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p = stpcpy(p, " IOPL");
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*p++ = '0' + (flags & 3);
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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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write(fd, buf, p - buf);
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}
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@ -111,8 +124,8 @@ relegated static void ShowGeneralRegisters(int fd, ucontext_t *ctx) {
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write(fd, "\r\n", 2);
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for (i = 0, j = 0, k = 0; i < ARRAYLEN(kGregNames); ++i) {
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if (j > 0) write(fd, " ", 1);
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(dprintf)(fd, "%-3s %016lx", kGregNames[(unsigned)kGregOrder[i]],
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ctx->uc_mcontext.gregs[(unsigned)kGregOrder[i]]);
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dprintf(fd, "%-3s %016lx", kGregNames[(unsigned)kGregOrder[i]],
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ctx->uc_mcontext.gregs[(unsigned)kGregOrder[i]]);
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if (++j == 3) {
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j = 0;
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if (ctx->uc_mcontext.fpregs) {
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@ -120,12 +133,15 @@ relegated static void ShowGeneralRegisters(int fd, ucontext_t *ctx) {
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} else {
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memset(&st, 0, sizeof(st));
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}
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(dprintf)(fd, " %s(%zu) %Lf", "ST", k, st);
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dprintf(fd, " %s(%zu) %Lf", "ST", k, st);
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++k;
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write(fd, "\r\n", 2);
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}
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}
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DescribeCpuFlags(fd, ctx->uc_mcontext.gregs[REG_EFL]);
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DescribeCpuFlags(
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fd, ctx->uc_mcontext.gregs[REG_EFL],
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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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}
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relegated static void ShowSseRegisters(int fd, ucontext_t *ctx) {
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@ -133,11 +149,11 @@ relegated static void ShowSseRegisters(int fd, ucontext_t *ctx) {
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if (ctx->uc_mcontext.fpregs) {
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write(fd, "\r\n\r\n", 4);
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for (i = 0; i < 8; ++i) {
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(dprintf)(fd, VEIL("r", "%s%-2zu %016lx%016lx %s%-2d %016lx%016lx\r\n"),
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"XMM", i + 0, ctx->uc_mcontext.fpregs->xmm[i + 0].u64[1],
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ctx->uc_mcontext.fpregs->xmm[i + 0].u64[0], "XMM", i + 8,
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ctx->uc_mcontext.fpregs->xmm[i + 8].u64[1],
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ctx->uc_mcontext.fpregs->xmm[i + 8].u64[0]);
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dprintf(fd, "%s%-2zu %016lx%016lx %s%-2d %016lx%016lx\r\n", "XMM", i + 0,
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ctx->uc_mcontext.fpregs->xmm[i + 0].u64[1],
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ctx->uc_mcontext.fpregs->xmm[i + 0].u64[0], "XMM", i + 8,
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ctx->uc_mcontext.fpregs->xmm[i + 8].u64[1],
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ctx->uc_mcontext.fpregs->xmm[i + 8].u64[0]);
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}
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}
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}
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@ -164,13 +180,12 @@ relegated static void ShowCrashReport(int err, int fd, int sig,
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struct utsname names;
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strcpy(hostname, "unknown");
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gethostname(hostname, sizeof(hostname));
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(dprintf)(
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fd, VEIL("r", "\r\n%serror%s: Uncaught SIG%s on %s\r\n %s\r\n %s\r\n"),
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RED2, RESET, TinyStrSignal(sig), hostname, getauxval(AT_EXECFN),
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strerror(err));
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dprintf(fd, "\r\n%serror%s: Uncaught SIG%s on %s\r\n %s\r\n %s\r\n", RED2,
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RESET, TinyStrSignal(sig), hostname, getauxval(AT_EXECFN),
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strerror(err));
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if (uname(&names) != -1) {
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(dprintf)(fd, VEIL("r", " %s %s %s %s\r\n"), names.sysname, names.nodename,
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names.release, names.version);
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dprintf(fd, " %s %s %s %s\r\n", names.sysname, names.nodename,
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names.release, names.version);
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}
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ShowFunctionCalls(fd, ctx);
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if (ctx) {
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