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https://github.com/jart/cosmopolitan.git
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ff77f2a6af
- This change fixes a bug that allowed unbuffered printf() output (to streams like stderr) to be truncated. This regression was introduced some time between now and the last release. - POSIX specifies all functions as thread safe by default. This change works towards cleaning up our use of the @threadsafe / @threadunsafe documentation annotations to reflect that. The goal is (1) to use @threadunsafe to document functions which POSIX say needn't be thread safe, and (2) use @threadsafe to document functions that we chose to implement as thread safe even though POSIX didn't mandate it. - Tidy up the clock_gettime() implementation. We're now trying out a cleaner approach to system call support that aims to maintain the Linux errno convention as long as possible. This also fixes bugs that existed previously, where the vDSO errno wasn't being translated properly. The gettimeofday() system call is now a wrapper for clock_gettime(), which reduces bloat in apps that use both. - The recently-introduced improvements to the execute bit on Windows has had bugs fixed. access(X_OK) on a directory on Windows now succeeds. fstat() will now perform the MZ/#! ReadFile() operation correctly. - Windows.h is no longer included in libc/isystem/, because it confused PCRE's build system into thinking Cosmopolitan is a WIN32 platform. Cosmo's Windows.h polyfill was never even really that good, since it only defines a subset of the subset of WIN32 APIs that Cosmo defines. - The setlongerjmp() / longerjmp() APIs are removed. While they're nice APIs that are superior to the standardized setjmp / longjmp functions, they weren't superior enough to not be dead code in the monorepo. If you use these APIs, please file an issue and they'll be restored. - The .com appending magic has now been removed from APE Loader.
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
#ifndef COSMOPOLITAN_LIBC_THREAD_TLS_H_
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#define COSMOPOLITAN_LIBC_THREAD_TLS_H_
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#define TLS_ALIGNMENT 64
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#define TIB_FLAG_VFORKED 1
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#define TIB_FLAG_WINCRASHING 2
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct CosmoFtrace { /* 16 */
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bool ft_once; /* 0 */
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bool ft_noreentry; /* 1 */
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int ft_skew; /* 4 */
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int64_t ft_lastaddr; /* 8 */
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};
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/* NOTE: update aarch64 libc/errno.h if sizeof changes */
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/* NOTE: update aarch64 libc/proc/vfork.S if sizeof changes */
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/* NOTE: update aarch64 libc/nexgen32e/gc.S if sizeof changes */
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struct CosmoTib {
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struct CosmoTib *tib_self; /* 0x00 */
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struct CosmoFtrace tib_ftracer; /* 0x08 */
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void *tib_garbages; /* 0x18 */
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intptr_t tib_locale; /* 0x20 */
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intptr_t tib_pthread; /* 0x28 */
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struct CosmoTib *tib_self2; /* 0x30 */
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_Atomic(int32_t) tib_tid; /* 0x38 transitions -1 → tid → 0 */
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int32_t tib_errno; /* 0x3c */
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uint64_t tib_flags; /* 0x40 */
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int tib_ftrace; /* inherited */
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int tib_strace; /* inherited */
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_Atomic(uint64_t) tib_sigmask; /* inherited */
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_Atomic(uint64_t) tib_sigpending;
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_Atomic(uint64_t) tib_syshand; /* win32=kThread, xnusilicon=pthread_t */
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char *tib_sigstack_addr;
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uint32_t tib_sigstack_size;
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uint32_t tib_sigstack_flags;
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void **tib_keys;
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};
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extern int __threaded;
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extern unsigned __tls_index;
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char *_mktls(struct CosmoTib **);
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void __bootstrap_tls(struct CosmoTib *, char *);
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#ifdef __x86_64__
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extern bool __tls_enabled;
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#define __tls_enabled_set(x) __tls_enabled = x
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#elif defined(__aarch64__)
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#define __tls_enabled true
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#define __tls_enabled_set(x) (void)0
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#else
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#error "unsupported architecture"
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#endif
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void __set_tls(struct CosmoTib *);
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/**
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* Returns location of thread information block.
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*
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* This can't be used in privileged functions.
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*/
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__funline pureconst struct CosmoTib *__get_tls(void) {
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#ifdef __chibicc__
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return 0;
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#elif __x86_64__
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struct CosmoTib *__tib;
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__asm__("mov\t%%fs:0,%0" : "=r"(__tib));
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return __tib;
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#elif defined(__aarch64__)
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register struct CosmoTib *__tls __asm__("x28");
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return __tls - 1;
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#endif
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}
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#ifdef __x86_64__
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#define __adj_tls(tib) (tib)
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#elif defined(__aarch64__)
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#define __adj_tls(tib) ((struct CosmoTib *)(tib) + 1)
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#endif
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_THREAD_TLS_H_ */
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