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Filename : rlimit.stp
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%{
#include <linux/version.h>
%}

/**
 * sfunction rlimit_from_str - Symbolic string associated with resource limit code
 *
 * @lim_str: The string representation of limit
 *
 * Description: This function returns the number associated
 * with the given string, such as 0 for the string RLIMIT_CPU, or
 * -1 for an out-of-range value.
 */
function rlimit_from_str:long (lim_str:string)
%{ /* pure */ /* unmodified-fnargs */
#define aux_rlimit(limit_arg) \
    if (strncmp(STAP_ARG_lim_str, #limit_arg, MAXSTRINGLEN) == 0) { \
        STAP_RETVALUE = limit_arg; \
        return; \
    }

    /* Little kernel history digging */
    /* This set is stable from 2.6.1 kernel version */
    aux_rlimit(RLIMIT_CPU);
    aux_rlimit(RLIMIT_FSIZE);
    aux_rlimit(RLIMIT_DATA);
    aux_rlimit(RLIMIT_STACK);
    aux_rlimit(RLIMIT_CORE);
    aux_rlimit(RLIMIT_RSS);
    aux_rlimit(RLIMIT_NPROC);
    aux_rlimit(RLIMIT_NOFILE);
    aux_rlimit(RLIMIT_MEMLOCK);
    aux_rlimit(RLIMIT_AS);
    aux_rlimit(RLIMIT_LOCKS);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8)
    aux_rlimit(RLIMIT_SIGPENDING);
    aux_rlimit(RLIMIT_MSGQUEUE);
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12)
    aux_rlimit(RLIMIT_NICE);
    aux_rlimit(RLIMIT_RTPRIO);
#endif

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
    aux_rlimit(RLIMIT_RTTIME);
#endif

    STAP_RETVALUE = -1;

#undef aux_rlimit
%}