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Make more threading improvements

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- ASAN memory morgue is now lockless
- Make C11 atomics header more portable
- Rewrote pthread keys support to be lockless
- Simplify Python's unicode table unpacking code
- Make crash report write(2) closer to being atomic
- Make it possible to strace/ftrace a single thread
- ASAN now checks nul-terminated strings fast and properly
- Windows fork() now restores TLS memory of calling thread
This commit is contained in:
Justine Tunney 2022-11-01 22:36:03 -07:00
parent d7b88734cd
commit e522aa3a07
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GPG key ID: BE714B4575D6E328
189 changed files with 1363 additions and 1217 deletions
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14
third_party/python/Tools/unicode/makecjkcodecs.c vendored
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@ -55,8 +55,7 @@ void m(const char *s, void *p, size_t n) {
fprintf(f, "#include \"libc/x/x.h\"\n");
fprintf(f, "/* clang-format off */\n");
fprintf(f, "\n");
fprintf(f, "static bool %s_once;\n", s);
fprintf(f, "static void *%s_ptr;\n", s);
fprintf(f, "static _Atomic(void *) %s_ptr;\n", s);
fprintf(f, "static const unsigned char %s_rodata[] = {", s);
for (i = 0; i < m; ++i) {
if (i % 13 == 0) fprintf(f, "\n ");
@ -65,9 +64,7 @@ void m(const char *s, void *p, size_t n) {
fprintf(f, "\n};\n");
fprintf(f, "\n");
fprintf(f, "optimizesize void *%s(void) {\n", s);
fprintf(f, " if (%s_once) return %s_ptr;\n", s, s);
fprintf(f, " return xload(&%s_once,\n", s);
fprintf(f, " &%s_ptr,\n", s);
fprintf(f, " return xload(&%s_ptr,\n", s);
fprintf(f, " %s_rodata,\n", s);
fprintf(f, " %d, %d); /* %g%% profit */\n", m, n,
(double)m / n * 100);
@ -99,8 +96,7 @@ void dzd(const char *s, void *p, size_t n, size_t z) {
fprintf(f, "#include \"libc/x/x.h\"\n");
fprintf(f, "/* clang-format off */\n");
fprintf(f, "\n");
fprintf(f, "static bool %s_once;\n", s);
fprintf(f, "static void *%s_ptr;\n", s);
fprintf(f, "static _Atomic(void *) %s_ptr;\n", s);
fprintf(f, "static const unsigned char %s_rodata[%zu] = {", s, m);
for (i = 0; i < m; ++i) {
if (i % 13 == 0) fprintf(f, "\n ");
@ -109,9 +105,7 @@ void dzd(const char *s, void *p, size_t n, size_t z) {
fprintf(f, "\n};\n");
fprintf(f, "\n");
fprintf(f, "optimizesize void *%s(void) {\n", s);
fprintf(f, " if (%s_once) return %s_ptr;\n", s, s);
fprintf(f, " return xloadzd(&%s_once,\n", s);
fprintf(f, " &%s_ptr,\n", s);
fprintf(f, " return xloadzd(&%s_ptr,\n", s);
fprintf(f, " %s_rodata,\n", s);
fprintf(f, " %d, %d, %d, %d, 0x%08xu); /* %g%% profit */\n",
m, appendz(r).i, n / z, z, S, (double)m / n * 100);