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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2024-07-12 14:37:58 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-12 14:37:58 +0200 |
| commit | f9b3e8b3878f30810def3d151288847868ee084e (patch) | |
| tree | 925e90f81f21614be8514ccb81ca8bf91d7c3675 /compiler/rustc_codegen_gcc/example/std_example.rs | |
| parent | 18152d72a4e9d11bbc50633b3970f20410e6ef01 (diff) | |
| parent | ec0c755704bba1b6c4faa0b10aa0d886cdfa309e (diff) | |
| download | rust-f9b3e8b3878f30810def3d151288847868ee084e.tar.gz rust-f9b3e8b3878f30810def3d151288847868ee084e.zip | |
Rollup merge of #126827 - the8472:pidfd-spawn, r=workingjubilee
Use pidfd_spawn for faster process spawning when a PidFd is requested
glibc 2.39 added `pidfd_spawnp` and `pidfd_getpid` which makes it possible to get pidfds while staying on the CLONE_VFORK path.
verified that vfork gets used with strace:
```
$ strace -ff -e pidfd_open,clone3,openat,execve,waitid,close ./x test std --no-doc -- pidfd
[...]
[pid 2820532] clone3({flags=CLONE_VM|CLONE_PIDFD|CLONE_VFORK|CLONE_CLEAR_SIGHAND, pidfd=0x7b7f885fec6c, exit_signal=SIGCHLD, stack=0x7b7f88aff000, stack_size=0x9000}strace: Process 2820533 attached
<unfinished ...>
[pid 2820533] execve("/home/the8472/bin/sleep", ["sleep", "1000"], 0x7ffdd0e268d8 /* 107 vars */) = -1 ENOENT (No such file or directory)
[pid 2820533] execve("/home/the8472/.cargo/bin/sleep", ["sleep", "1000"], 0x7ffdd0e268d8 /* 107 vars */) = -1 ENOENT (No such file or directory)
[pid 2820533] execve("/usr/local/bin/sleep", ["sleep", "1000"], 0x7ffdd0e268d8 /* 107 vars */) = -1 ENOENT (No such file or directory)
[pid 2820533] execve("/usr/bin/sleep", ["sleep", "1000"], 0x7ffdd0e268d8 /* 107 vars */ <unfinished ...>
[pid 2820532] <... clone3 resumed> => {pidfd=[3]}, 88) = 2820533
[pid 2820533] <... execve resumed>) = 0
[pid 2820532] openat(AT_FDCWD, "/proc/self/fdinfo/3", O_RDONLY|O_CLOEXEC) = 4
[pid 2820532] close(4) = 0
```
Tracking issue: #82971
Diffstat (limited to 'compiler/rustc_codegen_gcc/example/std_example.rs')
0 files changed, 0 insertions, 0 deletions