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Add posix_fadvise(3).

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Bug: 12449798
Change-Id: I07cbf3f670a0d1304b68148325a774f266b5c433
This commit is contained in:
Elliott Hughes 2014-09-10 17:39:00 -07:00
parent 7efad83d43
commit 0000826378
11 changed files with 228 additions and 2 deletions
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1
libc/Android.mk
View file

@ -144,6 +144,7 @@ libc_bionic_src_files := \
bionic/pause.cpp \
bionic/pipe.cpp \
bionic/poll.cpp \
bionic/posix_fadvise.cpp \
bionic/posix_fallocate.cpp \
bionic/posix_timers.cpp \
bionic/pthread_atfork.cpp \

6
libc/SYSCALLS.TXT
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@ -167,6 +167,12 @@ void* mmap|mmap64(void*, size_t, int, int, int, off_t) arm64,mips64,x86_64
int fallocate64:fallocate(int, int, off64_t, off64_t) arm,mips,x86
int fallocate|fallocate64(int, int, off_t, off_t) arm64,mips64,x86_64
# posix_fadvise64 is awkward: arm has shuffled arguments,
# the POSIX functions don't set errno, and no architecture has posix_fadvise.
int __arm_fadvise64_64:arm_fadvise64_64(int, int, off64_t, off64_t) arm
int __fadvise64:fadvise64_64(int, off64_t, off64_t, int) mips,x86
int __fadvise64:fadvise64(int, off64_t, off64_t, int) arm64,mips64,x86_64
int __fstatfs64:fstatfs64(int, size_t, struct statfs*) arm,mips,x86
int fstatfs64|fstatfs:fstatfs(int, struct statfs*) arm64,mips64,x86_64
int __statfs64:statfs64(const char*, size_t, struct statfs*) arm,mips,x86

22
libc/arch-arm/syscalls/__arm_fadvise64_64.S Normal file
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@ -0,0 +1,22 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__arm_fadvise64_64)
mov ip, sp
stmfd sp!, {r4, r5, r6, r7}
.cfi_def_cfa_offset 16
.cfi_rel_offset r4, 0
.cfi_rel_offset r5, 4
.cfi_rel_offset r6, 8
.cfi_rel_offset r7, 12
ldmfd ip, {r4, r5, r6}
ldr r7, =__NR_arm_fadvise64_64
swi #0
ldmfd sp!, {r4, r5, r6, r7}
.cfi_def_cfa_offset 0
cmn r0, #(MAX_ERRNO + 1)
bxls lr
neg r0, r0
b __set_errno_internal
END(__arm_fadvise64_64)

15
libc/arch-arm64/syscalls/__fadvise64.S Normal file
View file

@ -0,0 +1,15 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__fadvise64)
mov x8, __NR_fadvise64
svc #0
cmn x0, #(MAX_ERRNO + 1)
cneg x0, x0, hi
b.hi __set_errno_internal
ret
END(__fadvise64)
.hidden __fadvise64

19
libc/arch-mips/syscalls/__fadvise64.S Normal file
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@ -0,0 +1,19 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__fadvise64)
.set noreorder
.cpload t9
li v0, __NR_fadvise64_64
syscall
bnez a3, 1f
move a0, v0
j ra
nop
1:
la t9,__set_errno_internal
j t9
nop
.set reorder
END(__fadvise64)

26
libc/arch-mips64/syscalls/__fadvise64.S Normal file
View file

@ -0,0 +1,26 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__fadvise64)
.set push
.set noreorder
li v0, __NR_fadvise64
syscall
bnez a3, 1f
move a0, v0
j ra
nop
1:
move t0, ra
bal 2f
nop
2:
.cpsetup ra, t1, 2b
LA t9,__set_errno_internal
.cpreturn
j t9
move ra, t0
.set pop
END(__fadvise64)
.hidden __fadvise64

46
libc/arch-x86/syscalls/__fadvise64.S Normal file
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@ -0,0 +1,46 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__fadvise64)
pushl %ebx
.cfi_def_cfa_offset 8
.cfi_rel_offset ebx, 0
pushl %ecx
.cfi_adjust_cfa_offset 4
.cfi_rel_offset ecx, 0
pushl %edx
.cfi_adjust_cfa_offset 4
.cfi_rel_offset edx, 0
pushl %esi
.cfi_adjust_cfa_offset 4
.cfi_rel_offset esi, 0
pushl %edi
.cfi_adjust_cfa_offset 4
.cfi_rel_offset edi, 0
pushl %ebp
.cfi_adjust_cfa_offset 4
.cfi_rel_offset ebp, 0
mov 28(%esp), %ebx
mov 32(%esp), %ecx
mov 36(%esp), %edx
mov 40(%esp), %esi
mov 44(%esp), %edi
mov 48(%esp), %ebp
movl $__NR_fadvise64_64, %eax
int $0x80
cmpl $-MAX_ERRNO, %eax
jb 1f
negl %eax
pushl %eax
call __set_errno_internal
addl $4, %esp
1:
popl %ebp
popl %edi
popl %esi
popl %edx
popl %ecx
popl %ebx
ret
END(__fadvise64)

17
libc/arch-x86_64/syscalls/__fadvise64.S Normal file
View file

@ -0,0 +1,17 @@
/* Generated by gensyscalls.py. Do not edit. */
#include <private/bionic_asm.h>
ENTRY(__fadvise64)
movq %rcx, %r10
movl $__NR_fadvise64, %eax
syscall
cmpq $-MAX_ERRNO, %rax
jb 1f
negl %eax
movl %eax, %edi
call __set_errno_internal
1:
ret
END(__fadvise64)
.hidden __fadvise64

51
libc/bionic/posix_fadvise.cpp Normal file
View file

@ -0,0 +1,51 @@
/*
* Copyright (C) 2014 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <fcntl.h>
#include "private/ErrnoRestorer.h"
extern "C" int __arm_fadvise64_64(int, int, off64_t, off64_t);
extern "C" int __fadvise64(int, off64_t, off64_t, int);
// No architecture actually has the 32-bit off_t system call.
int posix_fadvise(int fd, off_t offset, off_t length, int advice) {
return posix_fadvise64(fd, offset, length, advice);
}
#if defined(__arm__)
int posix_fadvise64(int fd, off64_t offset, off64_t length, int advice) {
ErrnoRestorer errno_restorer;
return (__arm_fadvise64_64(fd, advice, offset, length) == 0) ? 0 : errno;
}
#else
int posix_fadvise64(int fd, off64_t offset, off64_t length, int advice) {
ErrnoRestorer errno_restorer;
return (__fadvise64(fd, offset, length, advice) == 0) ? 0 : errno;
}
#endif

2
libc/include/fcntl.h
View file

@ -72,6 +72,8 @@ extern int openat(int, const char*, int, ...);
extern int openat64(int, const char*, int, ...);
extern int open(const char*, int, ...);
extern int open64(const char*, int, ...);
extern int posix_fadvise64(int, off64_t, off64_t, int);
extern int posix_fadvise(int, off_t, off_t, int);
extern int posix_fallocate64(int, off64_t, off64_t);
extern int posix_fallocate(int, off_t, off_t);
extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int);

25
tests/fcntl_test.cpp
View file

@ -70,10 +70,32 @@ TEST(fcntl, creat_creat64) {
ASSERT_EQ(ENOENT, errno);
}
TEST(fcntl, posix_fadvise) {
TemporaryFile tf;
errno = 0;
EXPECT_EQ(EBADF, posix_fadvise(-1, 0, 0, POSIX_FADV_NORMAL));
EXPECT_EQ(0, errno);
EXPECT_EQ(EBADF, posix_fadvise64(-1, 0, 0, POSIX_FADV_NORMAL));
EXPECT_EQ(0, errno);
EXPECT_EQ(EINVAL, posix_fadvise(tf.fd, 0, 0, -1));
EXPECT_EQ(0, errno);
EXPECT_EQ(EINVAL, posix_fadvise64(tf.fd, 0, 0, -1));
EXPECT_EQ(0, errno);
EXPECT_EQ(0, posix_fadvise(tf.fd, 0, 0, POSIX_FADV_NORMAL));
EXPECT_EQ(0, posix_fadvise64(tf.fd, 0, 0, POSIX_FADV_NORMAL));
}
TEST(fcntl, fallocate_EINVAL) {
TemporaryFile tf;
#if defined(__BIONIC__)
// fallocate/fallocate64 set errno.
// posix_fallocate/posix_fallocate64 return an errno value.
errno = 0;
ASSERT_EQ(-1, fallocate(tf.fd, 0, 0, -1));
ASSERT_EQ(EINVAL, errno);
@ -81,7 +103,6 @@ TEST(fcntl, fallocate_EINVAL) {
errno = 0;
ASSERT_EQ(-1, fallocate64(tf.fd, 0, 0, -1));
ASSERT_EQ(EINVAL, errno);
#endif
errno = 0;
ASSERT_EQ(EINVAL, posix_fallocate(tf.fd, 0, -1));