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e604a5e4bb
Add __nonnull((2)) to the setrlimit()/getrlimit() function declaration
to avoid null pointer access.
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v2
According to the suggestions of the Adhemerval Zanella and Zack Weinberg:
use __nonnull() to check null pointers in the compilation phase.
do not add pointer check code to setrlimit()/getrlimit().
The validity of the "resource" parameter is checked in the syscall.
v1
https://public-inbox.org/libc-alpha/20201230114131.47589-1-nixiaoming@huawei.com/
-----
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
#ifndef _SYS_RESOURCE_H
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#include <resource/sys/resource.h>
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#ifndef _ISOMAC
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# include <time.h>
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# include <string.h>
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/* Internal version of rusage with a 64-bit time_t. */
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#if __TIMESIZE == 64
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# define __rusage64 rusage
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#else
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struct __rusage64
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{
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struct __timeval64 ru_utime;
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struct __timeval64 ru_stime;
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__extension__ union
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{
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long int ru_maxrss;
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__syscall_slong_t __ru_maxrss_word;
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};
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__extension__ union
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{
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long int ru_ixrss;
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__syscall_slong_t __ru_ixrss_word;
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};
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__extension__ union
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{
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long int ru_idrss;
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__syscall_slong_t __ru_idrss_word;
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};
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__extension__ union
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{
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long int ru_isrss;
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__syscall_slong_t __ru_isrss_word;
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};
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__extension__ union
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{
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long int ru_minflt;
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__syscall_slong_t __ru_minflt_word;
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};
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__extension__ union
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{
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long int ru_majflt;
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__syscall_slong_t __ru_majflt_word;
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};
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__extension__ union
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{
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long int ru_nswap;
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__syscall_slong_t __ru_nswap_word;
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};
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__extension__ union
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{
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long int ru_inblock;
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__syscall_slong_t __ru_inblock_word;
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};
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__extension__ union
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{
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long int ru_oublock;
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__syscall_slong_t __ru_oublock_word;
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};
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__extension__ union
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{
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long int ru_msgsnd;
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__syscall_slong_t __ru_msgsnd_word;
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};
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__extension__ union
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{
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long int ru_msgrcv;
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__syscall_slong_t __ru_msgrcv_word;
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};
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__extension__ union
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{
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long int ru_nsignals;
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__syscall_slong_t __ru_nsignals_word;
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};
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__extension__ union
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{
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long int ru_nvcsw;
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__syscall_slong_t __ru_nvcsw_word;
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};
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__extension__ union
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{
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long int ru_nivcsw;
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__syscall_slong_t __ru_nivcsw_word;
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};
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};
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#endif
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static inline void
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rusage64_to_rusage (const struct __rusage64 *restrict r64,
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struct rusage *restrict r)
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{
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/* Make sure the entire output structure is cleared, including
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padding and reserved fields. */
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memset (r, 0, sizeof *r);
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r->ru_utime = valid_timeval64_to_timeval (r64->ru_utime);
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r->ru_stime = valid_timeval64_to_timeval (r64->ru_stime);
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r->ru_maxrss = r64->ru_maxrss;
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r->ru_ixrss = r64->ru_ixrss;
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r->ru_idrss = r64->ru_idrss;
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r->ru_isrss = r64->ru_isrss;
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r->ru_minflt = r64->ru_minflt;
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r->ru_majflt = r64->ru_majflt;
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r->ru_nswap = r64->ru_nswap;
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r->ru_inblock = r64->ru_inblock;
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r->ru_oublock = r64->ru_oublock;
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r->ru_msgsnd = r64->ru_msgsnd;
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r->ru_msgrcv = r64->ru_msgrcv;
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r->ru_nsignals = r64->ru_nsignals;
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r->ru_nvcsw = r64->ru_nvcsw;
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r->ru_nivcsw = r64->ru_nivcsw;
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}
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/* Prototypes repeated instead of using __typeof because
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sys/resource.h is included in C++ tests, and declaring functions
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with __typeof and __THROW doesn't work for C++. */
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extern int __getpriority (__priority_which_t __which, id_t __who) __THROW;
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libc_hidden_proto (__getpriority)
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extern int __setpriority (__priority_which_t __which, id_t __who, int __prio)
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__THROW;
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libc_hidden_proto (__setpriority)
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libc_hidden_proto (getrlimit64)
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extern __typeof (getrlimit64) __getrlimit64;
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libc_hidden_proto (__getrlimit64);
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/* Now define the internal interfaces. */
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extern int __getrlimit (enum __rlimit_resource __resource,
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struct rlimit *__rlimits) __nonnull ((2));
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libc_hidden_proto (__getrlimit)
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extern int __getrusage (enum __rusage_who __who, struct rusage *__usage)
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attribute_hidden;
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extern int __setrlimit (enum __rlimit_resource __resource,
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const struct rlimit *__rlimits) __nonnull ((2));
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libc_hidden_proto (__setrlimit);
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#if __TIMESIZE == 64
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# define __getrusage64 __getrusage
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# define __wait4_time64 __wait4
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# define __wait3_time64 __wait3
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#else
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extern int __getrusage64 (enum __rusage_who who, struct __rusage64 *usage);
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libc_hidden_proto (__getrusage64)
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extern pid_t __wait4_time64 (pid_t pid, int *stat_loc, int options,
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struct __rusage64 *usage);
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libc_hidden_proto (__wait4_time64)
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extern pid_t __wait3_time64 (int *stat_loc, int options,
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struct __rusage64 *usage);
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libc_hidden_proto (__wait3_time64)
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#endif
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#endif
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#endif
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