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Add dontthrow attribute to most libc functions

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This will help C++ code that uses exceptions to be tinier. For example,
this change shaves away 1000 lines of assembly code from LLVM's libcxx,
which is 0.7% of all assembly instructions in the entire library.
This commit is contained in:
Justine Tunney 2024-01-09 01:26:03 -08:00
parent cb19e172da
commit eeb20775d2
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
103 changed files with 1455 additions and 1456 deletions
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13
libc/mem/alg.h
View file

@ -3,12 +3,11 @@
COSMOPOLITAN_C_START_
void *bsearch(const void *, const void *, size_t, size_t,
int (*)(const void *, const void *))
paramsnonnull() dontthrow nosideeffect;
int (*)(const void *, const void *)) paramsnonnull() nosideeffect;
void *bsearch_r(const void *, const void *, size_t, size_t,
int (*)(const void *, const void *, void *), void *)
paramsnonnull((1, 2, 5)) dontthrow nosideeffect;
void djbsort(int32_t *, size_t);
paramsnonnull((1, 2, 5)) nosideeffect;
void djbsort(int32_t *, size_t) libcesque;
void qsort3(void *, size_t, size_t, int (*)(const void *, const void *))
paramsnonnull();
void qsort(void *, size_t, size_t, int (*)(const void *, const void *))
@ -26,10 +25,8 @@ int mergesort(void *, size_t, size_t, int (*)(const void *, const void *));
int mergesort_r(void *, size_t, size_t,
int (*)(const void *, const void *, void *), void *);
#define __algalloc returnspointerwithnoaliases dontthrow nocallback __wur
int radix_sort_int32(int32_t *, size_t);
int radix_sort_int64(int64_t *, size_t);
int radix_sort_int32(int32_t *, size_t) libcesque;
int radix_sort_int64(int64_t *, size_t) libcesque;
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_ALG_ALG_H_ */

8
libc/mem/critbit0.h
View file

@ -11,15 +11,15 @@ struct critbit0 {
size_t count;
};
bool critbit0_contains(struct critbit0 *, const char *) dontthrow nosideeffect
bool critbit0_contains(struct critbit0 *, const char *) libcesque nosideeffect
paramsnonnull();
int critbit0_insert(struct critbit0 *, const char *) paramsnonnull();
bool critbit0_delete(struct critbit0 *, const char *) dontthrow paramsnonnull();
void critbit0_clear(struct critbit0 *) dontthrow paramsnonnull();
bool critbit0_delete(struct critbit0 *, const char *) libcesque paramsnonnull();
void critbit0_clear(struct critbit0 *) libcesque paramsnonnull();
char *critbit0_get(struct critbit0 *, const char *);
intptr_t critbit0_allprefixed(struct critbit0 *, const char *,
intptr_t (*)(const char *, void *), void *)
paramsnonnull((1, 2, 3)) dontthrow;
paramsnonnull((1, 2, 3)) libcesque;
int critbit0_emplace(struct critbit0 *, const void *, size_t) paramsnonnull();
COSMOPOLITAN_C_END_

6
libc/mem/gc.h
View file

@ -3,9 +3,9 @@
#ifdef _COSMO_SOURCE
COSMOPOLITAN_C_START_
void _gc_free(void *) libcesque;
void __defer(void *, void *, void *) libcesque;
void gclongjmp(void *, int) libcesque wontreturn;
libcesque void _gc_free(void *);
libcesque void __defer(void *, void *, void *);
libcesque void gclongjmp(void *, int) wontreturn;
#define gc(THING) defer((void *)_gc_free, (void *)(THING))
#define _gc(THING) defer((void *)_gc_free, (void *)(THING))
#define defer(FN, ARG) \

2
libc/mem/internal.h
View file

@ -8,7 +8,7 @@ struct CritbitNode {
unsigned otherbits;
};
int __putenv(char *, bool);
int __putenv(char *, bool) libcesque;
bool __grow(void *, size_t *, size_t, size_t) paramsnonnull((1, 2)) libcesque;
COSMOPOLITAN_C_END_

24
libc/mem/mem.h
View file

@ -24,14 +24,14 @@ char *strdup(const char *) paramsnonnull() mallocesque;
char *strndup(const char *, size_t) paramsnonnull() mallocesque;
void *aligned_alloc(size_t, size_t) attributeallocalign((1))
attributeallocsize((2)) returnspointerwithnoaliases libcesque __wur;
int posix_memalign(void **, size_t, size_t);
int posix_memalign(void **, size_t, size_t) libcesque;
int mallopt(int, int);
int malloc_trim(size_t);
size_t bulk_free(void **, size_t);
size_t malloc_usable_size(void *);
void **independent_calloc(size_t, size_t, void **);
void **independent_comalloc(size_t, size_t *, void **);
int mallopt(int, int) libcesque;
int malloc_trim(size_t) libcesque;
size_t bulk_free(void **, size_t) libcesque;
size_t malloc_usable_size(void *) libcesque;
void **independent_calloc(size_t, size_t, void **) libcesque;
void **independent_comalloc(size_t, size_t *, void **) libcesque;
wchar_t *wcsdup(const wchar_t *) strlenesque __wur;
@ -48,12 +48,12 @@ struct mallinfo {
size_t keepcost; /* releasable (via malloc_trim) space */
};
struct mallinfo mallinfo(void);
struct mallinfo mallinfo(void) libcesque;
size_t malloc_footprint(void);
size_t malloc_max_footprint(void);
size_t malloc_footprint_limit(void);
size_t malloc_set_footprint_limit(size_t);
size_t malloc_footprint(void) libcesque;
size_t malloc_max_footprint(void) libcesque;
size_t malloc_footprint_limit(void) libcesque;
size_t malloc_set_footprint_limit(size_t) libcesque;
void malloc_inspect_all(void (*)(void *, void *, size_t, void *), void *);
COSMOPOLITAN_C_END_

8
libc/mem/sortedints.internal.h
View file

@ -8,10 +8,10 @@ struct SortedInts {
int *p;
};
bool ContainsInt(const struct SortedInts *, int);
bool InsertInt(struct SortedInts *, int, bool);
int CountInt(const struct SortedInts *, int);
int LeftmostInt(const struct SortedInts *, int);
bool ContainsInt(const struct SortedInts *, int) libcesque;
bool InsertInt(struct SortedInts *, int, bool) libcesque;
int CountInt(const struct SortedInts *, int) libcesque;
int LeftmostInt(const struct SortedInts *, int) libcesque;
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_MEM_SORTEDINTS_INTERNAL_H_ */