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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.
64 lines
2.8 KiB
C
64 lines
2.8 KiB
C
#ifndef COSMOPOLITAN_LIBC_MEM_MEM_H_
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#define COSMOPOLITAN_LIBC_MEM_MEM_H_
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#define M_TRIM_THRESHOLD (-1)
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#define M_GRANULARITY (-2)
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#define M_MMAP_THRESHOLD (-3)
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § dynamic memory ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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void free(void *) libcesque;
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void *malloc(size_t) attributeallocsize((1)) mallocesque;
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void *calloc(size_t, size_t) attributeallocsize((1, 2)) mallocesque;
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void *memalign(size_t, size_t) attributeallocalign((1))
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attributeallocsize((2)) returnspointerwithnoaliases libcesque nodiscard;
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void *realloc(void *, size_t) reallocesque;
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void *realloc_in_place(void *, size_t) reallocesque;
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void *reallocarray(void *, size_t, size_t) nodiscard;
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void *valloc(size_t) attributeallocsize((1)) vallocesque;
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void *pvalloc(size_t) vallocesque;
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char *strdup(const char *) paramsnonnull() mallocesque;
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char *strndup(const char *, size_t) paramsnonnull() mallocesque;
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void *aligned_alloc(size_t, size_t) attributeallocsize((1))
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attributeallocsize((2)) returnspointerwithnoaliases libcesque nodiscard;
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int posix_memalign(void **, size_t, size_t);
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bool __grow(void *, size_t *, size_t, size_t) paramsnonnull((1, 2)) libcesque;
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int malloc_trim(size_t);
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size_t bulk_free(void **, size_t);
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size_t malloc_usable_size(const void *);
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void **independent_calloc(size_t, size_t, void **);
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void **independent_comalloc(size_t, size_t *, void **);
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wchar_t *wcsdup(const wchar_t *) strlenesque nodiscard;
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struct mallinfo {
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size_t arena; /* non-mmapped space allocated from system */
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size_t ordblks; /* number of free chunks */
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size_t smblks; /* always 0 */
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size_t hblks; /* always 0 */
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size_t hblkhd; /* space in mmapped regions */
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size_t usmblks; /* maximum total allocated space */
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size_t fsmblks; /* always 0 */
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size_t uordblks; /* total allocated space */
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size_t fordblks; /* total free space */
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size_t keepcost; /* releasable (via malloc_trim) space */
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};
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struct mallinfo mallinfo(void);
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void malloc_stats(void);
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bool32 mallopt(int, int);
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size_t malloc_footprint(void);
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size_t malloc_max_footprint(void);
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size_t malloc_footprint_limit(void);
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size_t malloc_set_footprint_limit(size_t);
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void malloc_inspect_all(void (*handler)(void *, void *, size_t, void *),
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void *);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_MEM_MEM_H_ */
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