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Make fixes and improvements

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- Document more compiler flags
- Expose new __print_maps() api
- Better overflow checking in mmap()
- Improve the shell example somewhat
- Fix minor runtime bugs regarding stacks
- Make kill() on fork()+execve()'d children work
- Support CLONE_CHILD_CLEARTID for proper joining
- Fix recent possible deadlock regression with --ftrace
This commit is contained in:
Justine Tunney 2022-05-19 16:57:49 -07:00
parent 6e52cba37a
commit ec2cb88058
68 changed files with 1211 additions and 431 deletions
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41
examples/compress.c
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@ -9,6 +9,7 @@
#endif
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/fmt/conv.h"
#include "libc/log/check.h"
#include "libc/mem/mem.h"
#include "libc/runtime/gc.internal.h"
@ -16,13 +17,36 @@
#include "libc/str/str.h"
#include "third_party/zlib/zlib.h"
#define CHUNK 4096
#define CHUNK 32768
// clang-format off
// make -j8 o//examples && dd if=/dev/urandom count=100 | tee a | o//examples/compress.com | o//examples/decompress.com >b && sha1sum a b
/*
# data file is o/dbg/third_party/python/python.com
# level 0 147517 compress 495 MB/s decompress 1.4 GB/s
# level 1 80274 compress 29.2 MB/s decompress 303 MB/s
# level 2 79384 compress 33.8 MB/s decompress 212 MB/s
# level 3 78875 compress 28.9 MB/s decompress 224 MB/s
# level 4 78010 compress 27.1 MB/s decompress 319 MB/s <-- sweet spot?
# level 5 77107 compress 19.5 MB/s decompress 273 MB/s
# level 6 75081 compress 10.0 MB/s decompress 99.3 MB/s
# level 7 75022 compress 7.5 MB/s decompress 287 MB/s
# level 8 75016 compress 5.4 MB/s decompress 109 MB/s
# level 9 75016 compress 5.4 MB/s decompress 344 MB/s
m=
make -j8 MODE=$m o/$m/examples || exit
for level in $(seq 0 9); do
o/$m/examples/compress.com $level <o/dbg/third_party/python/python.com | dd count=10000 2>/tmp/info >/tmp/comp
compspeed=$(grep -Po '[.\d]+ \w+/s' /tmp/info)
o/$m/examples/decompress.com $level </tmp/comp | dd count=10000 2>/tmp/info >/dev/null
decompspeed=$(grep -Po '[.\d]+ \w+/s' /tmp/info)
size=$(o/$m/examples/compress.com $level <o/$m/examples/compress.com | wc -c)
echo "level $level $size compress $compspeed decompress $decompspeed"
done
*/
// clang-format on
int compressor(int infd, int outfd) {
int compressor(int infd, int outfd, int level) {
z_stream zs;
int rc, flush;
unsigned have;
@ -33,8 +57,8 @@ int compressor(int infd, int outfd) {
zs.zalloc = 0;
zs.zfree = 0;
zs.opaque = 0;
rc = deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, MAX_WBITS,
DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
rc = deflateInit2(&zs, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
Z_DEFAULT_STRATEGY);
if (rc != Z_OK) return rc;
do {
rc = read(infd, inbuf, CHUNK);
@ -81,8 +105,13 @@ const char *zerr(int rc) {
}
int main(int argc, char *argv[]) {
int rc;
rc = compressor(0, 1);
int rc, level;
if (argc > 1) {
level = atoi(argv[1]);
} else {
level = Z_DEFAULT_COMPRESSION;
}
rc = compressor(0, 1, level);
if (rc == Z_OK) {
return 0;
} else {