diff options
42 files changed, 243 insertions, 1 deletions
@@ -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 <sys/mman.h>, 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _SYS_MMAN_H +# error "Never include <bits/mman_ext.h> directly; use <sys/mman.h> 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 <bits/mman_ext.h> + __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 <sys/mman.h>, 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _SYS_MMAN_H +# error "Never include <bits/mman_ext.h> directly; use <sys/mman.h> instead." +#endif + +#ifdef __USE_GNU +#include <bits/types/struct_iovec.h> + +/* + */ +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 + <https://www.gnu.org/licenses/>. */ + +#include <array_length.h> +#include <errno.h> +#include <limits.h> +#include <stdlib.h> +#include <support/check.h> +#include <support/process_state.h> +#include <support/support.h> +#include <support/xsocket.h> +#include <support/xunistd.h> +#include <sys/mman.h> +#include <sys/pidfd.h> +#include <sys/wait.h> + +/* 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 <support/test-driver.c> 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 |