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cosmopolitan/libc/runtime/cxaatexit.internal.h

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Improve memory safety 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.
2021-10-14 00:27:13 +00:00
#ifndef COSMOPOLITAN_LIBC_RUNTIME_CXAATEXIT_H_
#define COSMOPOLITAN_LIBC_RUNTIME_CXAATEXIT_H_
Implement raw system call for redbean lua code You can now call functions like fork() from Lua and it'll work across all supported platforms, including Windows. This gives you a level of control of the system that Lua traditionally hasn't been able to have due to its focus on old portable stdio rather modern POSIX APIs. Demo code has been added to redbean-demo.com to show how it works. This change also modifies Lua so that integer literals with a leading zero will be interpreted as octal. That should help avoid shooting in the foot with POSIX APIs that frequently use octal mode bits. This change fixes a bug in opendir(".") on New Technology. Lastly, redbean will now serve crash reports to private network IPs. This is consistent with other frameworks. However that isn't served to public IPs unless the -E flag is passed to redbean at startup.
2022-04-13 15:49:17 +00:00
#include "libc/stdio/stdio.h"
Improve memory safety 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.
2021-10-14 00:27:13 +00:00
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
struct CxaAtexitBlocks {
struct CxaAtexitBlock {
unsigned mask;
struct CxaAtexitBlock *next;
struct CxaAtexit {
void *fp;
void *arg;
void *pred;
} p[ATEXIT_MAX];
} * p, root;
};
extern struct CxaAtexitBlocks __cxa_blocks;
void __cxa_printexits(FILE *, void *);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_RUNTIME_CXAATEXIT_H_ */
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