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Add cpu / mem / fsz limits to build system

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Thanks to all the refactorings we now have the ability to enforce
reasonable limitations on the amount of resources any individual
compile or test can consume. Those limits are currently:

- `-C 8` seconds of 3.1ghz CPU time
- `-M 256mebibytes` of virtual memory
- `-F 100megabyte` limit on file size

Only one file currently needs to exceed these limits:

    o/$(MODE)/third_party/python/Objects/unicodeobject.o: \
        QUOTA += -C16  # overrides cpu limit to 16 seconds

This change introduces a new sizetol() function to LIBC_FMT for parsing
byte or bit size strings with Si unit suffixes. Functions like atoi()
have been rewritten too.
This commit is contained in:
Justine Tunney 2021-08-13 11:18:25 -07:00
parent 9b29358511
commit e963d9c8e3
49 changed files with 1802 additions and 553 deletions
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36
libc/fmt/wcstol.c
View file

@ -16,9 +16,41 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/strtol.internal.h"
#include "libc/limits.h"
#include "libc/str/str.h"
long wcstol(const wchar_t *s, wchar_t **end, int opt_base) {
return wcstoimax(s, end, opt_base);
/**
* Decodes signed integer from wide string.
*
* @param s is a non-null nul-terminated string
* @param endptr if non-null will always receive a pointer to the char
* following the last one this function processed, which is usually
* the NUL byte, or in the case of invalid strings, would point to
* the first invalid character
* @param base can be anywhere between [2,36] or 0 to auto-detect based
* on the the prefixes 0 (octal), 0x (hexadecimal), 0b (binary), or
* decimal (base 10) by default
* @return the decoded signed saturated number
*/
long wcstol(const wchar_t *s, wchar_t **endptr, int base) {
long x = 0;
int d, c = *s;
CONSUME_SPACES(s, c);
GET_SIGN(s, c, d);
GET_RADIX(s, c, base);
if ((c = kBase36[c & 255]) && --c < base) {
do {
if (__builtin_mul_overflow(x, base, &x) ||
__builtin_add_overflow(x, c * d, &x)) {
x = d > 0 ? LONG_MAX : LONG_MIN;
errno = ERANGE;
break;
}
} while ((c = kBase36[*++s & 255]) && --c < base);
}
if (endptr) *endptr = s;
return x;
}