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Make some systemic improvements

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- add vdso dump utility
- tests now log stack usage
- rename g_ftrace to __ftrace
- make internal spinlocks go faster
- add conformant c11 atomics library
- function tracing now logs stack usage
- make function call tracing thread safe
- add -X unsecure (no ssl) mode to redbean
- munmap() has more consistent behavior now
- pacify fsync() calls on python unit tests
- make --strace flag work better in redbean
- start minimizing and documenting compiler flags
This commit is contained in:
Justine Tunney 2022-05-18 16:41:29 -07:00
parent c6bbca55e9
commit 9208c83f7a
141 changed files with 1948 additions and 1411 deletions
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26
libc/intrin/spinlock.h
View file

@ -1,13 +1,8 @@
#ifndef COSMOPOLITAN_LIBC_INTRIN_SPINLOCK_H_
#define COSMOPOLITAN_LIBC_INTRIN_SPINLOCK_H_
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/lockcmpxchg.h"
#include "libc/log/backtrace.internal.h"
#include "libc/log/log.h"
#include "libc/runtime/symbols.internal.h"
#if IsModeDbg() && !defined(_SPINLOCK_DEBUG)
#define _SPINLOCK_DEBUG
@ -15,13 +10,13 @@
#if defined(_SPINLOCK_DEBUG)
#define _spinlock(lock) _spinlock_ndebug(lock)
#define _spinlock_ndebug(lock) _spinlock_optimistic(lock)
#define _spinlock_ndebug(lock) _spinlock_cooperative(lock)
#elif defined(TINY)
#define _spinlock(lock) _spinlock_tiny(lock)
#define _spinlock_ndebug(lock) _spinlock_tiny(lock)
#else
#define _spinlock(lock) _spinlock_optimistic(lock)
#define _spinlock_ndebug(lock) _spinlock_optimistic(lock)
#define _spinlock(lock) _spinlock_cooperative(lock)
#define _spinlock_ndebug(lock) _spinlock_cooperative(lock)
#endif
#define _spunlock(lock) __atomic_clear(lock, __ATOMIC_RELAXED)
@ -41,15 +36,18 @@
} \
} while (0)
#define _spinlock_optimistic(lock) \
#define _spinlock_cooperative(lock) \
do { \
int __tries = 0; \
for (;;) { \
typeof(*(lock)) x; \
__atomic_load(lock, &x, __ATOMIC_RELAXED); \
if (!x && !_trylock(lock)) { \
break; \
} else { \
} else if (++__tries & 7) { \
__builtin_ia32_pause(); \
} else { \
sched_yield(); \
} \
} \
} while (0)
@ -57,7 +55,7 @@
#define _spinlock_debug(lock) \
do { \
typeof(*(lock)) me, owner; \
unsigned long warntries = 10000000; \
unsigned long warntries = 16777216; \
me = gettid(); \
if (!_lockcmpxchg(lock, 0, me)) { \
__atomic_load(lock, &owner, __ATOMIC_RELAXED); \
@ -71,7 +69,11 @@
kprintf("%s:%d: warning: possible deadlock on %s in %s()\n", \
__FILE__, __LINE__, #lock, __FUNCTION__); \
} \
__builtin_ia32_pause(); \
if (warntries & 7) { \
__builtin_ia32_pause(); \
} else { \
sched_yield(); \
} \
} \
} \
} while (0)