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Increase stack size to 128k and guard size to 16k

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This improves our compatibility with Apple M1.
This commit is contained in:
Justine Tunney 2022-12-18 22:58:29 -08:00
parent 57c0dcdc29
commit dd04aeba1c
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GPG key ID: BE714B4575D6E328
36 changed files with 109 additions and 125 deletions
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11
libc/calls/calls.mk
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@ -121,21 +121,12 @@ o/$(MODE)/libc/calls/execlp.o \
o/$(MODE)/libc/calls/statfs.o \
o/$(MODE)/libc/calls/fstatfs.o \
o/$(MODE)/libc/calls/execve-sysv.o \
o/$(MODE)/libc/calls/readlinkat-nt.o \
o/$(MODE)/libc/calls/execve-nt.greg.o \
o/$(MODE)/libc/calls/mkntenvblock.o: private \
OVERRIDE_CPPFLAGS += \
-DSTACK_FRAME_UNLIMITED
# we must disable static stack safety because:
# PATH_MAX*sizeof(char16_t)*2 exceeds 4096 byte frame limit
o/$(MODE)/libc/calls/copyfile.o \
o/$(MODE)/libc/calls/symlinkat-nt.o \
o/$(MODE)/libc/calls/readlinkat-nt.o \
o/$(MODE)/libc/calls/linkat-nt.o \
o/$(MODE)/libc/calls/renameat-nt.o: private \
OVERRIDE_CPPFLAGS += \
-DSTACK_FRAME_UNLIMITED
# we must segregate codegen because:
# file contains multiple independently linkable apis
o/$(MODE)/libc/calls/ioctl-siocgifconf.o \

3
libc/calls/readlinkat-nt.c
View file

@ -28,6 +28,7 @@
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/reparsedatabuffer.h"
#include "libc/runtime/stack.h"
#include "libc/str/str.h"
#include "libc/str/utf16.h"
#include "libc/sysv/errfuns.h"
@ -45,7 +46,7 @@ textwindows ssize_t sys_readlinkat_nt(int dirfd, const char *path, char *buf,
if (__mkntpathat(dirfd, path, 0, path16) == -1) return -1;
mem = 16384;
memory = alloca(mem);
for (i = 0; i < mem; i += PAGESIZE) memory[i] = 0;
CheckLargeStackAllocation(memory, mem);
rdb = (struct NtReparseDataBuffer *)memory;
if ((h = CreateFile(path16, 0, 0, 0, kNtOpenExisting,
kNtFileFlagOpenReparsePoint | kNtFileFlagBackupSemantics,