mirror of
https://github.com/jart/cosmopolitan.git
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ae5d06dc53
- 10.5% reduction of o//depend dependency graph
- 8.8% reduction in latency of make command
- Fix issue with temporary file cleanup
There's a new -w option in compile.com that turns off the recent
Landlock output path workaround for "good commands" which do not
unlink() the output file like GNU tooling does.
Our new GNU Make unveil sandboxing appears to have zero overhead
in the grand scheme of things. Full builds are pretty fast since
the only thing that's actually slowed us down is probably libcxx
make -j16 MODE=rel
RL: took 85,732,063µs wall time
RL: ballooned to 323,612kb in size
RL: needed 828,560,521µs cpu (11% kernel)
RL: caused 39,080,670 page faults (99% memcpy)
RL: 350,073 context switches (72% consensual)
RL: performed 0 reads and 11,494,960 write i/o operations
pledge() and unveil() no longer consider ENOSYS to be an error.
These functions have also been added to Python's cosmo module.
This change also removes some WIN32 APIs and System Five magnums
which we're not using and it's doubtful anyone else would be too
65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
#ifndef COSMOPOLITAN_LIBC_FMT_PFLINK_H_
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#define COSMOPOLITAN_LIBC_FMT_PFLINK_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#ifndef __STRICT_ANSI__
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/**
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* @fileoverview builtin+preprocessor+linker tricks for printf/scanf.
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*
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* Your printf() function only requires that you pay for what you use.
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* These macros ensure that its code size starts at under 4kb, growing
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* to about 40kb for a fully-loaded implementation. This works best when
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* format strings are constexprs that only contain directives.
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*/
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#define PFLINK(...) _PFLINK(__VA_ARGS__)
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#define _PFLINK(FMT, ...) \
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({ \
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if (___PFLINK(FMT, strpbrk, "faAeg")) STATIC_YOINK("__fmt_dtoa"); \
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if (___PFLINK(FMT, strpbrk, "cmrqs")) { \
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if (___PFLINK(FMT, strstr, "%m")) STATIC_YOINK("strerror"); \
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if (___PFLINK(FMT, strstr, "%*") || \
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___PFLINK(FMT, strpbrk, "0123456789")) { \
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STATIC_YOINK("strnwidth"); \
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STATIC_YOINK("strnwidth16"); \
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STATIC_YOINK("wcsnwidth"); \
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} \
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} \
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FMT; \
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})
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#define SFLINK(...) _SFLINK(__VA_ARGS__)
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#define _SFLINK(FMT) \
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({ \
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if (___PFLINK(FMT, strchr, 'm')) { \
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STATIC_YOINK("malloc"); \
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STATIC_YOINK("calloc"); \
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STATIC_YOINK("free"); \
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STATIC_YOINK("__grow"); \
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} \
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FMT; \
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})
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#if __GNUC__ + 0 < 4 || defined(__llvm__)
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#define ___PFLINK(FMT, FN, C) 1
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#else
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#define ___PFLINK(FMT, FN, C) \
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!__builtin_constant_p(FMT) || ((FMT) && __builtin_##FN(FMT, C) != NULL)
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#endif
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#if defined(__GNUC__) && __GNUC__ < 6
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/*
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* Compilers don't understand the features we've added to the format
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* string DSL, such as c string escaping, therefore we can't use it.
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* Ideally compilers should grant us more flexibility to define DSLs
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*
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* The recommended approach to turning this back on is `CFLAGS=-std=c11`
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* which puts the compiler in __STRICT_ANSI__ mode, which Cosmopolitan
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* respects by disabling all the esoteric tuning in headers like this.
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*/
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#pragma GCC diagnostic ignored "-Wformat-security"
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#endif
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#endif /* __STRICT_ANSI__ */
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_FMT_PFLINK_H_ */
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