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Simplify TLS and reduce startup latency

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This change simplifies the thread-local storage support code. On Windows
and Mac OS X the startup latency of __enable_tls() has been reduced from
30ms to 1ms. On Windows, TLS memory accesses will now go much faster due
to better self-modifying code that prevents a function call and acquires
our thread information block pointer in a single instruction.
This commit is contained in:
Justine Tunney 2022-07-18 03:33:32 -07:00
parent 38c3fa63fe
commit b1d9d11be1
15 changed files with 136 additions and 312 deletions
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2
libc/calls/calls.h
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@ -67,7 +67,7 @@ int chdir(const char *);
int chmod(const char *, uint32_t);
int chown(const char *, uint32_t, uint32_t);
int chroot(const char *);
int clone(void *, void *, size_t, int, void *, int *, void *, size_t, int *);
int clone(void *, void *, size_t, int, void *, int *, void *, int *);
int close(int);
int creat(const char *, uint32_t);
int dup(int);