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Fix bugs with new memory manager

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This fixes a regression in mmap(MAP_FIXED) on Windows caused by a recent
revision. This change also fixes ZipOS so it no longer needs a MAP_FIXED
mapping to open files from the PKZIP store. The memory mapping mutex was
implemented incorrectly earlier which meant that ftrace and strace could
cause cause crashes. This lock and other recursive mutexes are rewritten
so that it should be provable that recursive mutexes in cosmopolitan are
asynchronous signal safe.
This commit is contained in:
Justine Tunney 2024-06-29 05:10:15 -07:00
parent 6de12c1032
commit 464858dbb4
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GPG key ID: BE714B4575D6E328
34 changed files with 353 additions and 313 deletions
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25
libc/thread/thread.h
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@ -15,7 +15,7 @@
#define PTHREAD_MUTEX_ROBUST 1
#define PTHREAD_PROCESS_PRIVATE 0
#define PTHREAD_PROCESS_SHARED 1
#define PTHREAD_PROCESS_SHARED 4
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_CREATE_DETACHED 1
@ -40,13 +40,12 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
#define PTHREAD_ONCE_INIT _PTHREAD_INIT
#define PTHREAD_COND_INITIALIZER _PTHREAD_INIT
#define PTHREAD_RWLOCK_INITIALIZER _PTHREAD_INIT
#define PTHREAD_MUTEX_INITIALIZER _PTHREAD_INIT
#define PTHREAD_ONCE_INIT {0}
#define PTHREAD_COND_INITIALIZER {0}
#define PTHREAD_RWLOCK_INITIALIZER {0}
#define PTHREAD_MUTEX_INITIALIZER {0}
#define _PTHREAD_INIT \
{ 0 }
#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP {0, 0, PTHREAD_MUTEX_RECURSIVE}
typedef uintptr_t pthread_t;
typedef int pthread_id_np_t;
@ -65,17 +64,13 @@ typedef struct pthread_spinlock_s {
} pthread_spinlock_t;
typedef struct pthread_mutex_s {
_Atomic(int32_t) _lock;
unsigned _type : 2;
unsigned _pshared : 1;
unsigned _depth : 6;
unsigned _owner : 23;
long _pid;
uint32_t _nsync;
int32_t _pid;
_Atomic(uint64_t) _word;
} pthread_mutex_t;
typedef struct pthread_mutexattr_s {
char _type;
char _pshared;
unsigned _word;
} pthread_mutexattr_t;
typedef struct pthread_cond_s {