mirror of
https://github.com/jart/cosmopolitan.git
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226aaf3547
This commit makes numerous refinements to cosmopolitan memory handling.
The default stack size has been reduced from 2mb to 128kb. A new macro
is now provided so you can easily reconfigure the stack size to be any
value you want. Work around the breaking change by adding to your main:
STATIC_STACK_SIZE(0x00200000); // 2mb stack
If you're not sure how much stack you need, then you can use:
STATIC_YOINK("stack_usage_logging");
After which you can `sort -nr o/$MODE/stack.log`. Based on the unit test
suite, nothing in the Cosmopolitan repository (except for Python) needs
a stack size greater than 30kb. There are also new macros for detecting
the size and address of the stack at runtime, e.g. GetStackAddr(). We
also now support sigaltstack() so if you want to see nice looking crash
reports whenever a stack overflow happens, you can put this in main():
ShowCrashReports();
Under `make MODE=dbg` and `make MODE=asan` the unit testing framework
will now automatically print backtraces of memory allocations when
things like memory leaks happen. Bugs are now fixed in ASAN global
variable overrun detection. The memtrack and asan runtimes also handle
edge cases now. The new tools helped to identify a few memory leaks,
which are fixed by this change.
This change should fix an issue reported in #288 with ARG_MAX limits.
Fixing this doubled the performance of MKDEPS.COM and AR.COM yet again.
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_H_
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#define COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_H_
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/typedef/sigaction_f.h"
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#include "libc/calls/typedef/sighandler_t.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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struct sigaction { /* cosmo abi */
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union {
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sighandler_t sa_handler;
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sigaction_f sa_sigaction;
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};
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uint64_t sa_flags;
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void (*sa_restorer)(void);
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struct sigset sa_mask;
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int64_t __pad;
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};
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sighandler_t signal(int, sighandler_t);
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int sigaction(int, const struct sigaction *, struct sigaction *);
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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COSMOPOLITAN_C_START_
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void _init_onntconsoleevent(void);
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void _init_wincrash(void);
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#ifndef __SIGACTION_YOINK
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#define __SIGACTION_YOINK(SIG) \
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do { \
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if (SupportsWindows()) { \
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if (__builtin_constant_p(SIG)) { \
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switch (SIG) { \
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case SIGINT: \
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case SIGQUIT: \
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case SIGHUP: \
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case SIGTERM: \
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YOINK(_init_onntconsoleevent); \
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break; \
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case SIGTRAP: \
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case SIGILL: \
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case SIGSEGV: \
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case SIGABRT: \
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case SIGFPE: \
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YOINK(_init_wincrash); \
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break; \
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default: \
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break; \
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} \
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} else { \
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YOINK(_init_onntconsoleevent); \
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YOINK(_init_wincrash); \
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} \
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} \
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} while (0)
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#endif
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#define sigaction(SIG, ACT, OLD) \
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({ \
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__SIGACTION_YOINK(SIG); \
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sigaction(SIG, (ACT), OLD); \
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})
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#define signal(SIG, HAND) \
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({ \
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__SIGACTION_YOINK(SIG); \
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signal(SIG, HAND); \
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})
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#endif /* GNU && !ANSI */
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_SIGACTION_H_ */
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