From patchwork Thu Jun 2 12:26:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 54741 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 95648396DC28 for ; Thu, 2 Jun 2022 12:27:47 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 95648396DC28 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1654172867; bh=WfTDysMHXGI9Hj6zOTsjyhaxFZAc5k6KvkLSF+Fu8+Y=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=tUcvRzXW6RgGQlHICc0aAFTY9AuSTZTZV920fExk7aSyymKyB65KAcF0rxLRxUIoG fV4JpQG+2fhGG8nF5MvJju/H2FUTdt5dxcGHVKb9BEIIbi3ez39AVA1OBNsCRBfsi7 ZWobssPKvD+k6TnnG3S2Bjnk0AkJp+uxn2Po4GVg= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-ot1-x32b.google.com (mail-ot1-x32b.google.com [IPv6:2607:f8b0:4864:20::32b]) by sourceware.org (Postfix) with ESMTPS id A5198396DC22 for ; Thu, 2 Jun 2022 12:27:06 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A5198396DC22 Received: by mail-ot1-x32b.google.com with SMTP id 30-20020a9d0121000000b0060ae97b9967so3286879otu.7 for ; Thu, 02 Jun 2022 05:27:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=WfTDysMHXGI9Hj6zOTsjyhaxFZAc5k6KvkLSF+Fu8+Y=; b=RJHd9V6aHpEhmyuU+M6embKtQChPs6UUGL05vd+OXDVRQVHBY1jyymQ9Q6CAr23c8C TCg4oxaYRDO9NVLAsbW5mWRNY7Fo5/G3+UoD2w3anoQrpDgO/M2cDFPnuMI8I2fBSwHv RA4QSfFCWjJChzFlquaQxiAe/ty57Vosg3Tu7l1PnQ9WarX7MNHQool9cMQ4yIx4kEDr 35Pvv/8XITv9vj8NJyaj0x4vvLnsFcvcnOWbtyiqaCqUjA6iyjie/sw2egYV0zINxMKi 6ApE+NavqckPeIcjJVNo+4TouZYgP+ssNFaqpfGXjFhL1vouIiOstVBRsuIy1/7kDEjQ F2Jw== X-Gm-Message-State: AOAM5333MHyQTZWs9AF6P6bkAHxWT+AoquK5iqWLfVf45ECTr6WyqY0E jXPHkq321CAbaocm4WmBjd94tGMA8viwnQ== X-Google-Smtp-Source: ABdhPJx5c4wuq4FwyGkkpdRkqbZ2kzy67XHyh7TniXDwFPj/KxX0NwgIfg5jUxLqMlSkymjGZSMo8A== X-Received: by 2002:a05:6830:2655:b0:60b:6f1:b409 with SMTP id f21-20020a056830265500b0060b06f1b409mr1856668otu.283.1654172825413; Thu, 02 Jun 2022 05:27:05 -0700 (PDT) Received: from birita.. ([2804:431:c7ca:e39c:d866:26cd:928:370a]) by smtp.gmail.com with ESMTPSA id 68-20020a9d064a000000b0060603221276sm2042837otn.70.2022.06.02.05.27.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jun 2022 05:27:05 -0700 (PDT) To: libc-alpha@sourceware.org, Carlos O'Donell Subject: [PATCH v4 1/2] linux: Add process_madvise Date: Thu, 2 Jun 2022 09:26:58 -0300 Message-Id: <20220602122659.949754-1-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-13.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" It was added on Linux 5.10 (ecb8ac8b1f146915aa6b96449b66dd48984caacc) with the same functionality as madvise but using a pidfd of the target process. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Carlos O'Donell --- NEWS | 4 + bits/mman_ext.h | 21 +++ misc/sys/mman.h | 3 + posix/Makefile | 2 +- sysdeps/unix/sysv/linux/Makefile | 5 + sysdeps/unix/sysv/linux/Versions | 1 + sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 + sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 + sysdeps/unix/sysv/linux/arc/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/le/libc.abilist | 1 + sysdeps/unix/sysv/linux/bits/mman_ext.h | 33 ++++ sysdeps/unix/sysv/linux/csky/libc.abilist | 1 + sysdeps/unix/sysv/linux/hppa/libc.abilist | 1 + sysdeps/unix/sysv/linux/i386/libc.abilist | 1 + sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 + .../sysv/linux/m68k/coldfire/libc.abilist | 1 + .../unix/sysv/linux/m68k/m680x0/libc.abilist | 1 + .../sysv/linux/microblaze/be/libc.abilist | 1 + .../sysv/linux/microblaze/le/libc.abilist | 1 + .../sysv/linux/mips/mips32/fpu/libc.abilist | 1 + .../sysv/linux/mips/mips32/nofpu/libc.abilist | 1 + .../sysv/linux/mips/mips64/n32/libc.abilist | 1 + .../sysv/linux/mips/mips64/n64/libc.abilist | 1 + sysdeps/unix/sysv/linux/nios2/libc.abilist | 1 + sysdeps/unix/sysv/linux/or1k/libc.abilist | 1 + .../linux/powerpc/powerpc32/fpu/libc.abilist | 1 + .../powerpc/powerpc32/nofpu/libc.abilist | 1 + .../linux/powerpc/powerpc64/be/libc.abilist | 1 + .../linux/powerpc/powerpc64/le/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv32/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv64/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-32/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-64/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 + .../sysv/linux/sparc/sparc32/libc.abilist | 1 + .../sysv/linux/sparc/sparc64/libc.abilist | 1 + sysdeps/unix/sysv/linux/syscalls.list | 1 + sysdeps/unix/sysv/linux/tst-process_madvise.c | 141 ++++++++++++++++++ .../unix/sysv/linux/x86_64/64/libc.abilist | 1 + .../unix/sysv/linux/x86_64/x32/libc.abilist | 1 + 42 files changed, 243 insertions(+), 1 deletion(-) create mode 100644 bits/mman_ext.h create mode 100644 sysdeps/unix/sysv/linux/bits/mman_ext.h create mode 100644 sysdeps/unix/sysv/linux/tst-process_madvise.c diff --git a/NEWS b/NEWS index ad0c08d8ca..5032f5fce5 100644 --- a/NEWS +++ b/NEWS @@ -20,6 +20,10 @@ Major new features: have been added. The pidfd functionality provides access to a process while avoiding the issue of PID reuse on tranditional Unix systems. +* On Linux, the process_madvise function has been added. It has the + same functionality as madvise but alters the target process identified + by the pidfd. + Deprecated and removed features, and other changes affecting compatibility: * Support for prelink will be removed in the next release; this includes diff --git a/bits/mman_ext.h b/bits/mman_ext.h new file mode 100644 index 0000000000..3ac42ab606 --- /dev/null +++ b/bits/mman_ext.h @@ -0,0 +1,21 @@ +/* System-specific extensions of , generic version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _SYS_MMAN_H +# error "Never include directly; use instead." +#endif diff --git a/misc/sys/mman.h b/misc/sys/mman.h index 311d44cfb1..02896a0acc 100644 --- a/misc/sys/mman.h +++ b/misc/sys/mman.h @@ -146,6 +146,9 @@ extern int shm_open (const char *__name, int __oflag, mode_t __mode); /* Remove shared memory segment. */ extern int shm_unlink (const char *__name); +/* System-specific extensions. */ +#include + __END_DECLS #endif /* sys/mman.h */ diff --git a/posix/Makefile b/posix/Makefile index cfebb8ef06..d1df7c27cb 100644 --- a/posix/Makefile +++ b/posix/Makefile @@ -32,7 +32,7 @@ headers := sys/utsname.h sys/times.h sys/wait.h sys/types.h unistd.h \ bits/waitflags.h bits/waitstatus.h sys/unistd.h sched.h \ bits/sched.h bits/cpu-set.h re_comp.h wait.h bits/environments.h \ cpio.h spawn.h bits/unistd.h bits/types/struct_sched_param.h \ - bits/unistd_ext.h bits/types/idtype_t.h + bits/unistd_ext.h bits/types/idtype_t.h bits/mman_ext.h routines := \ uname \ diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 98b2324a21..627506daad 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -131,6 +131,11 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \ tst-pidfd \ # tests +# process_madvise requires CAP_SYS_ADMIN. +xtests += \ + tst-process_madvise \ + # xtests + # For +depfiles in Makerules. extra-test-objs += tst-sysconf-iov_max-uapi.o diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions index 694c64a5bc..c13a3c4fe7 100644 --- a/sysdeps/unix/sysv/linux/Versions +++ b/sysdeps/unix/sysv/linux/Versions @@ -303,6 +303,7 @@ libc { pidfd_open; pidfd_getfd; pidfd_send_signal; + process_madvise; } GLIBC_PRIVATE { # functions used in other libraries diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist index 7602129631..4d8e64ce04 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist @@ -2619,3 +2619,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index 5b39d6023c..36f3129257 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -2716,6 +2716,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist index e413302f2e..2a1e346d4b 100644 --- a/sysdeps/unix/sysv/linux/arc/libc.abilist +++ b/sysdeps/unix/sysv/linux/arc/libc.abilist @@ -2380,3 +2380,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist index ade1b93d13..25de8a018c 100644 --- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist @@ -499,6 +499,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist index 10e91537fa..e9cf9b1593 100644 --- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist @@ -496,6 +496,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 diff --git a/sysdeps/unix/sysv/linux/bits/mman_ext.h b/sysdeps/unix/sysv/linux/bits/mman_ext.h new file mode 100644 index 0000000000..20960e7df5 --- /dev/null +++ b/sysdeps/unix/sysv/linux/bits/mman_ext.h @@ -0,0 +1,33 @@ +/* System-specific extensions of , Linux version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _SYS_MMAN_H +# error "Never include directly; use instead." +#endif + +#ifdef __USE_GNU +#include + +/* + */ +extern __ssize_t process_madvise (int __pid_fd, const struct iovec* __iov, + size_t __count, int __advice, + unsigned __flags) + __THROW; + +#endif /* __USE_GNU */ diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist index 22618c7aaa..66c2f28c43 100644 --- a/sysdeps/unix/sysv/linux/csky/libc.abilist +++ b/sysdeps/unix/sysv/linux/csky/libc.abilist @@ -2655,3 +2655,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist index e2aea90c74..527880dc06 100644 --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist @@ -2604,6 +2604,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist index 29ecca26bb..1497b8a2c3 100644 --- a/sysdeps/unix/sysv/linux/i386/libc.abilist +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist @@ -2788,6 +2788,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist index 69a2ca2391..abe351d0b4 100644 --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist @@ -2554,6 +2554,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist index 23cc4ddd8a..130f7a6b04 100644 --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist @@ -500,6 +500,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0x98 GLIBC_2.4 _IO_2_1_stdin_ D 0x98 diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist index 2d1d8a3d0c..cf59edb383 100644 --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist @@ -2731,6 +2731,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist index 7b6e88bdb9..f1b927d63d 100644 --- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist @@ -2704,3 +2704,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist index 155c974790..9bb7c76f94 100644 --- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist @@ -2701,3 +2701,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist index 7a811120ea..03e7820eea 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist @@ -2696,6 +2696,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist index 7d28dca5c1..3d70dc1140 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist @@ -2694,6 +2694,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist index 41790f0d63..5498e2ee30 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist @@ -2702,6 +2702,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist index 9c15006c12..dbebed5d36 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist @@ -2605,6 +2605,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist index 27c0498b60..a0bfa86068 100644 --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist @@ -2743,3 +2743,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/or1k/libc.abilist b/sysdeps/unix/sysv/linux/or1k/libc.abilist index e500d4756f..7d09a03d0e 100644 --- a/sysdeps/unix/sysv/linux/or1k/libc.abilist +++ b/sysdeps/unix/sysv/linux/or1k/libc.abilist @@ -2126,3 +2126,4 @@ GLIBC_2.35 wscanf F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index adb21db204..db8fc28e75 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -2758,6 +2758,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index 28a08c4afb..e6cbb83b26 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -2791,6 +2791,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist index 98c5f3e61c..162241fc68 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist @@ -2513,6 +2513,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist index 31e5aa90cd..2845ee2015 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist @@ -2815,3 +2815,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist index 87d90bf668..277f6fbe95 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist @@ -2382,3 +2382,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist index b4a8f56aa2..6f2a4d4504 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist @@ -2582,3 +2582,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist index e4a58cc145..bfb317488d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist @@ -2756,6 +2756,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist index ef0f0c3fa1..beef516979 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist @@ -2550,6 +2550,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist index 603d50668f..c326c9320a 100644 --- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist @@ -2611,6 +2611,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist index 078cdf05a7..704f489a8e 100644 --- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist @@ -2608,6 +2608,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index 735505ac51..b9e8a34153 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -2751,6 +2751,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index 48df7952cd..e921a8dd76 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -2577,6 +2577,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index d9653bb433..2d664ea3f5 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -43,6 +43,7 @@ pidfd_open EXTRA pidfd_open i:iU pidfd_open pidfd_getfd EXTRA pidfd_getfd i:iiU pidfd_getfd pivot_root EXTRA pivot_root i:ss pivot_root pidfd_send_signal EXTRA pidfd_send_signal i:iiPU pidfd_send_signal +process_madvise EXTRA process_madvise i:iPniU process_madvise query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23 quotactl EXTRA quotactl i:isip quotactl remap_file_pages - remap_file_pages i:pUiUi __remap_file_pages remap_file_pages diff --git a/sysdeps/unix/sysv/linux/tst-process_madvise.c b/sysdeps/unix/sysv/linux/tst-process_madvise.c new file mode 100644 index 0000000000..a674e80b76 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-process_madvise.c @@ -0,0 +1,141 @@ +/* Basic tests for Linux process_madvise. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* The pair of sockets used for coordination. The subprocess uses + sockets[1]. */ +static int sockets[2]; + +static long int page_size; + +static void +exit_subprocess (int dummy) +{ + exit (EXIT_FAILURE); +} + +static void +subprocess (void) +{ + /* In case something goes wrong with parent before pidfd_send_signal. */ + support_create_timer (5, 0, false, exit_subprocess); + + void *p1 = xmmap (NULL, page_size * 2, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1); + + void *p2 = xmmap (NULL, page_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1); + xmunmap(p2, page_size); + + xsendto (sockets[1], &(struct iovec) { p1, page_size * 2 }, + sizeof (struct iovec), 0, NULL, 0); + + xsendto (sockets[1], &(struct iovec) { p2, page_size }, + sizeof (struct iovec), 0, NULL, 0); + + pause (); + + _exit (0); +} + +static int +do_test (void) +{ + page_size = sysconf (_SC_PAGE_SIZE); + + { + int r = pidfd_open (-1, 0); + TEST_COMPARE (r, -1); + if (errno == ENOSYS) + FAIL_UNSUPPORTED ("kernel does not support pidfd_open, skipping test"); + + TEST_COMPARE (errno, EINVAL); + } + + TEST_COMPARE (socketpair (AF_UNIX, SOCK_STREAM, 0, sockets), 0); + + pid_t pid = xfork (); + if (pid == 0) + { + xclose (sockets[0]); + subprocess (); + } + xclose (sockets[1]); + + int pidfd = pidfd_open (pid, 0); + TEST_VERIFY (pidfd != -1); + + /* The target process is going to send us two iovec's. The first one points + to a valid mapping, the other points to a previously valid mapping which + has now been unmapped. */ + { + struct iovec iv; + xrecvfrom (sockets[0], &iv, sizeof (iv), 0, NULL, 0); + + /* We expect this to succeed in the target process because the mapping + is valid. */ + TEST_COMPARE (process_madvise (pidfd, &iv, 1, MADV_COLD, 0), + 2 * page_size); + } + + { + struct iovec iv; + xrecvfrom (sockets[0], &iv, sizeof (iv), 0, NULL, 0); + + /* We expect this to fail in the target process because the second iovec + points to an unmapped region. The target process arranges for this to + be the case. */ + TEST_COMPARE (process_madvise (pidfd, &iv, 1, MADV_COLD, 0), -1); + TEST_COMPARE (errno, ENOMEM); + } + + { + struct iovec iv[IOV_MAX + 1]; + TEST_COMPARE (process_madvise (pidfd, iv, array_length (iv), MADV_COLD, + 0), -1); + TEST_COMPARE (errno, EINVAL); + } + + TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), 0); + { + siginfo_t info; + int r = waitid (P_PIDFD, pidfd, &info, WEXITED); + TEST_COMPARE (r, 0); + TEST_COMPARE (info.si_status, SIGKILL); + TEST_COMPARE (info.si_code, CLD_KILLED); + } + + TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), -1); + TEST_COMPARE (errno, ESRCH); + + return 0; +} + +#include diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist index 1629fb7762..8948dc2705 100644 --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist @@ -2528,6 +2528,7 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist index ee9674ff75..0988804f24 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist @@ -2634,3 +2634,4 @@ GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F +GLIBC_2.36 process_madvise F From patchwork Thu Jun 2 12:26:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 54742 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id AF86C396DC16 for ; Thu, 2 Jun 2022 12:28:34 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AF86C396DC16 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1654172914; bh=HGHZz1PIP4ck5Xxo2vhVs4ap+0tmvPCrjYsi9BU2gIA=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=A4Nl9FaKN39XyZk8ZMKi+Kl33ZBNx/I8x/9EW1dANt/UFqCj+sQNZmXHw2mJfdlH5 KdlNjrJX9FqHO7+RWCs7abxLOWp7O26Q3H/vV4aOWnID3mcFRL/cC0L06BhYIRyApC eR4uwZNO0h9CYqRzm+PqjUCCuaNo0+1V5udsF0RE= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-ot1-x333.google.com (mail-ot1-x333.google.com [IPv6:2607:f8b0:4864:20::333]) by sourceware.org (Postfix) with ESMTPS id 28BC3396D83B for ; Thu, 2 Jun 2022 12:27:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 28BC3396D83B Received: by mail-ot1-x333.google.com with SMTP id 61-20020a9d0bc3000000b0060b9bfcfe76so3269765oth.9 for ; Thu, 02 Jun 2022 05:27:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HGHZz1PIP4ck5Xxo2vhVs4ap+0tmvPCrjYsi9BU2gIA=; b=KOtfQI3UBbq0WygLuo27lUg1I+pcwA441QGbybX6BiXQ2n8cMdZBalf8ZM0CwDu4kN 6VSGsHwJ397rpCSCMXIY3hAk98oJAiHcg60DAzhwQtbsSL7guwNTh1srkgCn0sUxP8Z9 MYpT2XAcXxuYhzWWK1vsA/CEaxkmtqtn6dUFvETlXUrECEH1awjSn/Ak9gpV60wP1cyg kdvLi5eLN58YXVVF7+KD9ujOVUwSYDU9cRHo9z04k0EiByBk2eircvHLZ3sFpV60+eAy vzuJmFCywDhMEXPcy+tjOz7GJYXOyRKpO/LPK2yw4dBVCNBgO7EYKX/B1Basgkg6KkS9 EUvA== X-Gm-Message-State: AOAM532FBzkGjR6BNnvGZQ1uUYvWwdZtHzVAkm/p8qYzFINSIJzhjbt9 vx8EqmM82bz1dDeeKgNO/HGj3qpNeSuhZg== X-Google-Smtp-Source: ABdhPJw18gDlIdmmiXG6g+USMS0spSAjYPu4d6bUu+Q+bywtS4HkwhBbVYdxxxJ8+mDxdQxgnKQ0nQ== X-Received: by 2002:a05:6830:1485:b0:60b:51d:436e with SMTP id s5-20020a056830148500b0060b051d436emr1857304otq.59.1654172827050; Thu, 02 Jun 2022 05:27:07 -0700 (PDT) Received: from birita.. ([2804:431:c7ca:e39c:d866:26cd:928:370a]) by smtp.gmail.com with ESMTPSA id 68-20020a9d064a000000b0060603221276sm2042837otn.70.2022.06.02.05.27.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jun 2022 05:27:06 -0700 (PDT) To: libc-alpha@sourceware.org, Carlos O'Donell Subject: [PATCH v4 2/2] linux: Add process_mrelease Date: Thu, 2 Jun 2022 09:26:59 -0300 Message-Id: <20220602122659.949754-2-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220602122659.949754-1-adhemerval.zanella@linaro.org> References: <20220602122659.949754-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-13.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. Checked on x86_64-linux-gnu. --- NEWS | 5 ++ sysdeps/unix/sysv/linux/Makefile | 1 + sysdeps/unix/sysv/linux/Versions | 1 + sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 + sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 + sysdeps/unix/sysv/linux/arc/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/le/libc.abilist | 1 + sysdeps/unix/sysv/linux/bits/mman_ext.h | 2 + sysdeps/unix/sysv/linux/csky/libc.abilist | 1 + sysdeps/unix/sysv/linux/hppa/libc.abilist | 1 + sysdeps/unix/sysv/linux/i386/libc.abilist | 1 + sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 + .../sysv/linux/m68k/coldfire/libc.abilist | 1 + .../unix/sysv/linux/m68k/m680x0/libc.abilist | 1 + .../sysv/linux/microblaze/be/libc.abilist | 1 + .../sysv/linux/microblaze/le/libc.abilist | 1 + .../sysv/linux/mips/mips32/fpu/libc.abilist | 1 + .../sysv/linux/mips/mips32/nofpu/libc.abilist | 1 + .../sysv/linux/mips/mips64/n32/libc.abilist | 1 + .../sysv/linux/mips/mips64/n64/libc.abilist | 1 + sysdeps/unix/sysv/linux/nios2/libc.abilist | 1 + sysdeps/unix/sysv/linux/or1k/libc.abilist | 1 + .../linux/powerpc/powerpc32/fpu/libc.abilist | 1 + .../powerpc/powerpc32/nofpu/libc.abilist | 1 + .../linux/powerpc/powerpc64/be/libc.abilist | 1 + .../linux/powerpc/powerpc64/le/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv32/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv64/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-32/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-64/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 + .../sysv/linux/sparc/sparc32/libc.abilist | 1 + .../sysv/linux/sparc/sparc64/libc.abilist | 1 + sysdeps/unix/sysv/linux/syscalls.list | 1 + .../unix/sysv/linux/tst-process_mrelease.c | 75 +++++++++++++++++++ .../unix/sysv/linux/x86_64/64/libc.abilist | 1 + .../unix/sysv/linux/x86_64/x32/libc.abilist | 1 + 39 files changed, 118 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/tst-process_mrelease.c diff --git a/NEWS b/NEWS index 5032f5fce5..6a213775e6 100644 --- a/NEWS +++ b/NEWS @@ -24,6 +24,11 @@ Major new features: same functionality as madvise but alters the target process identified by the pidfd. +* On Linux, the process_mrelease function has been added. It allows a + caller to release the memory of a dying process. The release of the + memory is carried out in the context of the caller, using the caller's + CPU affinity, and priority with CPU usage accounted to the caller. + Deprecated and removed features, and other changes affecting compatibility: * Support for prelink will be removed in the next release; this includes diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 627506daad..9e691fa103 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -129,6 +129,7 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \ tst-epoll \ tst-getauxval \ tst-pidfd \ + tst-process_mrelease \ # tests # process_madvise requires CAP_SYS_ADMIN. diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions index c13a3c4fe7..66a995d3dc 100644 --- a/sysdeps/unix/sysv/linux/Versions +++ b/sysdeps/unix/sysv/linux/Versions @@ -304,6 +304,7 @@ libc { pidfd_getfd; pidfd_send_signal; process_madvise; + process_mrelease; } GLIBC_PRIVATE { # functions used in other libraries diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist index 4d8e64ce04..027a1cf531 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist @@ -2620,3 +2620,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index 36f3129257..703fcf5deb 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -2717,6 +2717,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist index 2a1e346d4b..28c52dcbac 100644 --- a/sysdeps/unix/sysv/linux/arc/libc.abilist +++ b/sysdeps/unix/sysv/linux/arc/libc.abilist @@ -2381,3 +2381,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist index 25de8a018c..c3adade814 100644 --- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist @@ -500,6 +500,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist index e9cf9b1593..33a90a248e 100644 --- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist @@ -497,6 +497,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 diff --git a/sysdeps/unix/sysv/linux/bits/mman_ext.h b/sysdeps/unix/sysv/linux/bits/mman_ext.h index 20960e7df5..97234a7adf 100644 --- a/sysdeps/unix/sysv/linux/bits/mman_ext.h +++ b/sysdeps/unix/sysv/linux/bits/mman_ext.h @@ -30,4 +30,6 @@ extern __ssize_t process_madvise (int __pid_fd, const struct iovec* __iov, unsigned __flags) __THROW; +extern int process_mrelease (int pidfd, unsigned int flags) __THROW; + #endif /* __USE_GNU */ diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist index 66c2f28c43..23a00cfc0b 100644 --- a/sysdeps/unix/sysv/linux/csky/libc.abilist +++ b/sysdeps/unix/sysv/linux/csky/libc.abilist @@ -2656,3 +2656,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist index 527880dc06..93e1068208 100644 --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist @@ -2605,6 +2605,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist index 1497b8a2c3..356b05cae4 100644 --- a/sysdeps/unix/sysv/linux/i386/libc.abilist +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist @@ -2789,6 +2789,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist index abe351d0b4..58e51aae4b 100644 --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist @@ -2555,6 +2555,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist index 130f7a6b04..ea4a19cbc2 100644 --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist @@ -501,6 +501,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0x98 GLIBC_2.4 _IO_2_1_stdin_ D 0x98 diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist index cf59edb383..217717859c 100644 --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist @@ -2732,6 +2732,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist index f1b927d63d..0e373d5c89 100644 --- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist @@ -2705,3 +2705,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist index 9bb7c76f94..569d3e5556 100644 --- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist @@ -2702,3 +2702,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist index 03e7820eea..7ccc7f93eb 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist @@ -2697,6 +2697,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist index 3d70dc1140..d197f0bd5d 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist @@ -2695,6 +2695,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist index 5498e2ee30..4a8e857e53 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist @@ -2703,6 +2703,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist index dbebed5d36..e0a170c030 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist @@ -2606,6 +2606,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist index a0bfa86068..6f809245c9 100644 --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist @@ -2744,3 +2744,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/or1k/libc.abilist b/sysdeps/unix/sysv/linux/or1k/libc.abilist index 7d09a03d0e..1fc9e27c27 100644 --- a/sysdeps/unix/sysv/linux/or1k/libc.abilist +++ b/sysdeps/unix/sysv/linux/or1k/libc.abilist @@ -2127,3 +2127,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index db8fc28e75..01ba1dd9ec 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -2759,6 +2759,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index e6cbb83b26..263231a396 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -2792,6 +2792,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist index 162241fc68..2c3c3af8fb 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist @@ -2514,6 +2514,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist index 2845ee2015..4138874b38 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist @@ -2816,3 +2816,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist index 277f6fbe95..5feae3245f 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist @@ -2383,3 +2383,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist index 6f2a4d4504..3e6a4ae5ec 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist @@ -2583,3 +2583,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist index bfb317488d..93c7b79b51 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist @@ -2757,6 +2757,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist index beef516979..b663fabeba 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist @@ -2551,6 +2551,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist index c326c9320a..abebf77944 100644 --- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist @@ -2612,6 +2612,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist index 704f489a8e..afd8a42895 100644 --- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist @@ -2609,6 +2609,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index b9e8a34153..56feda817d 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -2752,6 +2752,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index e921a8dd76..00cc5b24d1 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -2578,6 +2578,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 2d664ea3f5..b12a0d56fa 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -44,6 +44,7 @@ pidfd_getfd EXTRA pidfd_getfd i:iiU pidfd_getfd pivot_root EXTRA pivot_root i:ss pivot_root pidfd_send_signal EXTRA pidfd_send_signal i:iiPU pidfd_send_signal process_madvise EXTRA process_madvise i:iPniU process_madvise +process_mrelease EXTRA process_mrelease i:iU process_mrelease query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23 quotactl EXTRA quotactl i:isip quotactl remap_file_pages - remap_file_pages i:pUiUi __remap_file_pages remap_file_pages diff --git a/sysdeps/unix/sysv/linux/tst-process_mrelease.c b/sysdeps/unix/sysv/linux/tst-process_mrelease.c new file mode 100644 index 0000000000..def5d732fc --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-process_mrelease.c @@ -0,0 +1,75 @@ +/* Basic tests for Linux process_mrelease. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#include +#include +#include + +static void +subprocess (void) +{ + pause (); + _exit (0); +} + +static int +do_test (void) +{ + { + int r = process_mrelease (-1, 0); + TEST_COMPARE (r, -1); + if (errno == ENOSYS) + FAIL_UNSUPPORTED ("kernel does not support process_mrelease, " + "skipping test"); + TEST_COMPARE (errno, EBADF); + } + + pid_t pid = xfork (); + if (pid == 0) + subprocess (); + + int pidfd = pidfd_open (pid, 0); + TEST_VERIFY (pidfd != -1); + + /* The syscall only succeedes if the target process is exiting and there + is no guarantee that calling if after pidfd_send_signal will not error + (ince the process might have already been reaped by the OS). So just + check if it does fail when the process is stll running. */ + TEST_COMPARE (process_mrelease (pidfd, 0), -1); + TEST_COMPARE (errno, EINVAL); + + TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), 0); + { + siginfo_t info; + int r = waitid (P_PIDFD, pidfd, &info, WEXITED); + TEST_COMPARE (r, 0); + TEST_COMPARE (info.si_status, SIGKILL); + TEST_COMPARE (info.si_code, CLD_KILLED); + } + + TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), -1); + TEST_COMPARE (errno, ESRCH); + + return 0; +} + +#include diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist index 8948dc2705..4e729bdf56 100644 --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist @@ -2529,6 +2529,7 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist index 0988804f24..b5d7b9f1ed 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist @@ -2635,3 +2635,4 @@ GLIBC_2.36 pidfd_getfd F GLIBC_2.36 pidfd_open F GLIBC_2.36 pidfd_send_signal F GLIBC_2.36 process_madvise F +GLIBC_2.36 process_mrelease F