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Make execve() linger when it can't spoof parent

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It's now possible to use execve() when the parent process isn't built by
cosmo. In such cases, the current process will kill all threads and then
linger around, waiting for the newly created process to die, and then we
propagate its exit code to the parent. This should help bazel and others

Allocating private anonymous memory is now 5x faster on Windows. This is
thanks to VirtualAlloc() which is faster than the file mapping APIs. The
fork() function also now goes 30% faster, since we are able to avoid the
VirtualProtect() calls on mappings in most cases now.

Fixes #1253
This commit is contained in:
Justine Tunney 2025-01-04 21:11:53 -08:00
parent c97a858470
commit 42a3bb729a
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40 changed files with 612 additions and 656 deletions
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4
libc/calls/syscall-nt.internal.h
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@ -2,6 +2,9 @@
#define COSMOPOLITAN_LIBC_CALLS_SYSCALL_NT_INTERNAL_H_
COSMOPOLITAN_C_START_
extern int sys_getppid_nt_cosmo;
extern int sys_getppid_nt_win32;
bool32 sys_isatty(int);
int sys_chdir_nt(const char *);
int sys_dup_nt(int, int, int, int);
@ -37,6 +40,7 @@ int sys_unlinkat_nt(int, const char *, int);
int64_t sys_lseek_nt(int, int64_t, int);
ssize_t sys_read_nt_impl(int, void *, size_t, int64_t);
ssize_t sys_readlinkat_nt(int, const char *, char *, size_t);
void sys_getppid_nt_wipe(int, int);
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_CALLS_SYSCALL_NT_INTERNAL_H_ */