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Get Redbean fork() working on the New Technology

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Now that we have understandable system call tracing on Windows, this
change rewrites many of the polyfill internals for that platform, to
help things get closer to tip top shape. Support for complex forking
scenarios had been in a regressed state for quite some time. Now, it
works! Subsequent changes should be able to address the performance.
This commit is contained in:
Justine Tunney 2022-03-20 08:01:14 -07:00
parent efedef6e65
commit 0cb6b6ff4b
84 changed files with 1340 additions and 338 deletions
Download patch file Download diff file Expand all files Collapse all files

58
libc/calls/directmap-nt.c
View file

@ -23,6 +23,7 @@
#include "libc/nt/enum/filemapflags.h"
#include "libc/nt/enum/pageflags.h"
#include "libc/nt/memory.h"
#include "libc/nt/process.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/overlapped.h"
#include "libc/runtime/directmap.internal.h"
@ -33,7 +34,6 @@ textwindows noasan struct DirectMap sys_mmap_nt(void *addr, size_t size,
int prot, int flags,
int64_t handle, int64_t off) {
/* asan runtime depends on this function */
bool32 rc;
uint32_t got;
size_t i, upsize;
struct DirectMap dm;
@ -44,18 +44,12 @@ textwindows noasan struct DirectMap sys_mmap_nt(void *addr, size_t size,
* combination of flags, that'll cause Windows to actually do this!
*/
upsize = ROUNDUP(size, FRAMESIZE);
dm.maphandle = CreateFileMappingNuma(-1, &kNtIsInheritable,
kNtPageExecuteReadwrite, upsize >> 32,
upsize, NULL, kNtNumaNoPreferredNode);
STRACE(
"CreateFileMappingNuma(-1, kNtPageExecuteReadwrite, %'zu/%'zu) -> %p",
upsize, size, dm.maphandle);
if (dm.maphandle) {
dm.addr =
MapViewOfFileExNuma(dm.maphandle, kNtFileMapWrite | kNtFileMapExecute,
0, 0, upsize, addr, kNtNumaNoPreferredNode);
STRACE("MapViewOfFileExNuma(WX, %p) → addr:%p", addr, dm.addr);
if (dm.addr) {
if ((dm.maphandle = CreateFileMappingNuma(
-1, &kNtIsInheritable, kNtPageExecuteReadwrite, upsize >> 32,
upsize, NULL, kNtNumaNoPreferredNode))) {
if ((dm.addr = MapViewOfFileExNuma(
dm.maphandle, kNtFileMapWrite | kNtFileMapExecute, 0, 0, upsize,
addr, kNtNumaNoPreferredNode))) {
for (i = 0; i < size; i += got) {
got = 0;
op.Internal = 0;
@ -69,37 +63,27 @@ textwindows noasan struct DirectMap sys_mmap_nt(void *addr, size_t size,
if (i == size) {
return dm;
}
rc = UnmapViewOfFile(dm.addr);
STRACE("%s(addr:%p) → %hhhd% m", "UnmapViewOfFile", dm.maphandle, rc);
UnmapViewOfFile(dm.addr);
}
rc = CloseHandle(dm.maphandle);
STRACE("%s(%p) → %hhhd% m", "CloseHandle", dm.maphandle, rc);
CloseHandle(dm.maphandle);
}
} else {
dm.maphandle = CreateFileMappingNuma(
handle, &kNtIsInheritable,
(prot & PROT_WRITE) ? kNtPageExecuteReadwrite : kNtPageExecuteRead,
handle != -1 ? 0 : size >> 32, handle != -1 ? 0 : size, NULL,
kNtNumaNoPreferredNode);
STRACE("CreateFileMappingNuma(fhand:%ld, prot:%s, size:%'zu) → %p", handle,
(prot & PROT_WRITE) ? "XRW" : "XR", handle != -1 ? 0 : size);
if (dm.maphandle) {
dm.addr = MapViewOfFileExNuma(
dm.maphandle,
(prot & PROT_WRITE) ? kNtFileMapWrite | kNtFileMapExecute
: kNtFileMapRead | kNtFileMapExecute,
off >> 32, off, size, addr, kNtNumaNoPreferredNode);
STRACE("MapViewOfFileExNuma(prot:%s, off:%'ld, size:%'zu, addr:%p) → %p",
(prot & PROT_WRITE) ? "WX" : "RX", off, size, addr, dm.addr);
if (dm.addr) {
if ((dm.maphandle = CreateFileMappingNuma(
handle, &kNtIsInheritable,
(prot & PROT_WRITE) ? kNtPageExecuteReadwrite : kNtPageExecuteRead,
handle != -1 ? 0 : size >> 32, handle != -1 ? 0 : size, NULL,
kNtNumaNoPreferredNode))) {
if ((dm.addr = MapViewOfFileExNuma(
dm.maphandle,
(prot & PROT_WRITE) ? kNtFileMapWrite | kNtFileMapExecute
: kNtFileMapRead | kNtFileMapExecute,
off >> 32, off, size, addr, kNtNumaNoPreferredNode))) {
return dm;
} else {
rc = CloseHandle(dm.maphandle);
STRACE("%s(%p) → %d% m", "CloseHandle", dm.maphandle, rc);
}
CloseHandle(dm.maphandle);
}
}
dm.maphandle = kNtInvalidHandleValue;
dm.addr = (void *)(intptr_t)__winerr();
dm.addr = (void *)(intptr_t)-1;
return dm;
}