Message ID | 20220602170914.1230738-1-adhemerval.zanella@linaro.org |
---|---|
State | New |
Headers | show |
Series | [v5] linux: Add process_mrelease | expand |
On 6/2/22 13:09, Adhemerval Zanella wrote: > 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. LGTM. Reviewed-by: Carlos O'Donell <carlos@redhat.com> > --- > 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 | 86 +++++++++++++++++++ > .../unix/sysv/linux/x86_64/64/libc.abilist | 1 + > .../unix/sysv/linux/x86_64/x32/libc.abilist | 1 + > 39 files changed, 129 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. OK. > + > 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 OK. > 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..958db3cbb8 > --- /dev/null > +++ b/sysdeps/unix/sysv/linux/tst-process_mrelease.c > @@ -0,0 +1,86 @@ > +/* 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <errno.h> > +#include <stdlib.h> > +#include <support/check.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> > + > +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); OK. > + > + 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); OK. > + > + 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 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
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..958db3cbb8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-process_mrelease.c @@ -0,0 +1,86 @@ +/* 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 + <https://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <stdlib.h> +#include <support/check.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> + +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); + + 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 <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 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