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Build tool for hunting down flakes

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Justine Tunney 2024-12-24 11:34:42 -08:00
parent 93e22c581f
commit 2de3845b25
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GPG key ID: BE714B4575D6E328
10 changed files with 78 additions and 131 deletions
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7
test/libc/calls/cachestat_test.c
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@ -29,6 +29,7 @@
#include "libc/runtime/runtime.h"
#include "libc/runtime/sysconf.h"
#include "libc/stdio/rand.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/auxv.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
@ -104,12 +105,14 @@ done:
}
TEST(cachestat, testCachestatShmem) {
char name[64];
sprintf(name, "/cachestat_test-%ld", _rand64());
size_t filesize = 512 * 2 * pagesize; // 2 2MB huge pages.
size_t compute_len = 512 * pagesize;
unsigned long num_pages = compute_len / pagesize;
char *data = gc(xmalloc(filesize));
ASSERT_SYS(0, filesize, getrandom(data, filesize, 0));
ASSERT_SYS(0, 3, shm_open("tmpshmcstat", O_CREAT | O_RDWR, 0600));
ASSERT_SYS(0, 3, shm_open(name, O_CREAT | O_RDWR, 0600));
ASSERT_SYS(0, 0, ftruncate(3, filesize));
ASSERT_SYS(0, filesize, write(3, data, filesize));
struct cachestat_range range = {pagesize, compute_len};
@ -117,6 +120,6 @@ TEST(cachestat, testCachestatShmem) {
ASSERT_SYS(0, 0, cachestat(3, &range, &cs, 0));
ASSERT_EQ(num_pages, cs.nr_cache + cs.nr_evicted,
"total number of cached and evicted pages is off.\n");
ASSERT_SYS(0, 0, shm_unlink("tmpshmcstat"));
ASSERT_SYS(0, 0, shm_unlink(name));
ASSERT_SYS(0, 0, close(3));
}