Refactor some code

- Write tests for cthreads
- Fix bugs in pe2.com tool
- Fix ASAN issue with GetDosEnviron()
- Consolidate the cthread header files
- Some code size optimizations for MODE=
- Attempted to squash a tls linker warning
- Attempted to get futexes working on FreeBSD

test/libc/thread/create_test.c

@@ -0,0 +1,100 @@
+/*-*- 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 2022 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/calls/calls.h"
+#include "libc/dce.h"
+#include "libc/errno.h"
+#include "libc/runtime/internal.h"
+#include "libc/runtime/runtime.h"
+#include "libc/testlib/testlib.h"
+#include "libc/thread/thread.h"
+#include "libc/time/time.h"
+
+static _Thread_local int tdata = 31337;
+static _Thread_local int tbss;
+
+static void *ReturnArg(void *arg) {
+  return arg;
+}
+
+TEST(cthread_create, testJoinDeadlock) {
+  ASSERT_SYS(0, EDEADLK, cthread_join(cthread_self(), 0));
+}
+
+TEST(cthread_create, testCreateReturnJoin) {
+  if (IsOpenbsd()) return;  // TODO(jart): we've getting flakes
+  void *exitcode;
+  cthread_t thread;
+  ASSERT_EQ(0, cthread_create(&thread, 0, ReturnArg, ReturnArg));
+  ASSERT_EQ(0, cthread_join(thread, &exitcode));
+  ASSERT_EQ(ReturnArg, exitcode);
+}
+
+static void *ExitArg(void *arg) {
+  cthread_exit(arg);
+}
+
+TEST(cthread_create, testCreateExitJoin) {
+  if (IsOpenbsd()) return;  // TODO(jart): we've getting flakes
+  void *exitcode;
+  cthread_t thread;
+  ASSERT_EQ(0, cthread_create(&thread, 0, ExitArg, (void *)-31337));
+  ASSERT_EQ(0, cthread_join(thread, &exitcode));
+  ASSERT_EQ((void *)-31337, exitcode);
+}
+
+TEST(gcctls, size) {
+  if (IsXnu()) return;      // TODO(jart): codemorph
+  if (IsWindows()) return;  // TODO(jart): codemorph
+  if (IsOpenbsd()) return;  // TODO(jart): we've getting flakes
+  // schlep in .zip section too
+  // make sure executable isn't too huge
+  size_t size;
+  int64_t x = 0;
+  gmtime(&x);
+  ASSERT_LT((uintptr_t)_tls_size, 8192);
+  size = GetFileSize(GetProgramExecutableName());
+  if (IsTiny()) {
+    ASSERT_LT(size, 200 * 1024);
+  } else if (IsModeDbg()) {
+    ASSERT_LT(size, 4 * 1024 * 1024);
+  } else {
+    ASSERT_LT(size, 500 * 1024);
+  }
+}
+
+static void *TlsWorker(void *arg) {
+  ASSERT_EQ(31337, tdata);
+  ASSERT_EQ(0, tbss);
+  return 0;
+}
+
+TEST(gcctls, worksAndIsNonInheritable) {
+  if (IsXnu()) return;      // TODO(jart): codemorph
+  if (IsWindows()) return;  // TODO(jart): codemorph
+  if (IsOpenbsd()) return;  // TODO(jart): we've getting flakes
+  void *exitcode;
+  cthread_t thread;
+  ASSERT_EQ(tdata, 31337);
+  ASSERT_EQ(tbss, 0);
+  tdata = 1337;
+  tbss = 1337;
+  ASSERT_EQ(0, cthread_create(&thread, 0, TlsWorker, (void *)-31337));
+  ASSERT_EQ(0, cthread_join(thread, &exitcode));
+  ASSERT_EQ(NULL, exitcode);
+}