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v6.13
src/futex.c
194 строки
4 KB
Fabrice Le Fessant
src: introduce tprint_flags_begin and tprint_flags_end helpers
17 дек 2022, 11:00
17 дек 2022, 11:00
a6e43b0
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/* * Copyright (c) 2002-2003 Roland McGrath <roland@redhat.com> * Copyright (c) 2007-2008 Ulrich Drepper <drepper@redhat.com> * Copyright (c) 2009 Andreas Schwab <schwab@redhat.com> * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@strace.io> * Copyright (c) 2014-2022 The strace developers. * All rights reserved. * * SPDX-License-Identifier: LGPL-2.1-or-later */ #include "defs.h" #ifndef FUTEX_PRIVATE_FLAG # define FUTEX_PRIVATE_FLAG 128 #endif #ifndef FUTEX_CLOCK_REALTIME # define FUTEX_CLOCK_REALTIME 256 #endif #ifndef FUTEX_OP_OPARG_SHIFT # define FUTEX_OP_OPARG_SHIFT 8 #endif #include "xlat/futexbitset.h" #include "xlat/futexops.h" #include "xlat/futexwakeops.h" #include "xlat/futexwakecmps.h" static int do_futex(struct tcb *const tcp, const print_obj_by_addr_fn print_ts) { const kernel_ulong_t uaddr = tcp->u_arg[0]; const int op = tcp->u_arg[1]; const int cmd = op & 127; const kernel_ulong_t timeout = tcp->u_arg[3]; const kernel_ulong_t uaddr2 = tcp->u_arg[4]; const unsigned int val = tcp->u_arg[2]; const unsigned int val2 = tcp->u_arg[3]; const unsigned int val3 = tcp->u_arg[5]; const char *comment; /* uaddr */ printaddr(uaddr); tprint_arg_next(); /* futex_op */ printxval(futexops, op, "FUTEX_???"); switch (cmd) { case FUTEX_WAIT: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); print_ts(tcp, timeout); break; case FUTEX_LOCK_PI: case FUTEX_LOCK_PI2: tprint_arg_next(); print_ts(tcp, timeout); break; case FUTEX_WAIT_BITSET: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); print_ts(tcp, timeout); tprint_arg_next(); printxval(futexbitset, val3, NULL); break; case FUTEX_WAKE_BITSET: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); printxval(futexbitset, val3, NULL); break; case FUTEX_REQUEUE: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); PRINT_VAL_U(val2); tprint_arg_next(); printaddr(uaddr2); break; case FUTEX_CMP_REQUEUE: case FUTEX_CMP_REQUEUE_PI: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); PRINT_VAL_U(val2); tprint_arg_next(); printaddr(uaddr2); tprint_arg_next(); PRINT_VAL_U(val3); break; case FUTEX_WAKE_OP: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); PRINT_VAL_U(val2); tprint_arg_next(); printaddr(uaddr2); tprint_arg_next(); tprint_flags_begin(); if ((val3 >> 28) & FUTEX_OP_OPARG_SHIFT) { tprint_shift_begin(); print_xlat(FUTEX_OP_OPARG_SHIFT); tprint_shift(); PRINT_VAL_U(28); tprint_shift_end(); tprint_flags_or(); } tprint_shift_begin(); comment = printxval(futexwakeops, (val3 >> 28) & 0x7, NULL) ? NULL : "FUTEX_OP_???"; tprint_shift(); PRINT_VAL_U(28); tprint_shift_end(); tprints_comment(comment); tprint_flags_or(); tprint_shift_begin(); PRINT_VAL_X((val3 >> 12) & 0xfff); tprint_shift(); PRINT_VAL_U(12); tprint_shift_end(); tprint_flags_or(); tprint_shift_begin(); comment = printxval(futexwakecmps, (val3 >> 24) & 0xf, NULL) ? NULL : "FUTEX_OP_CMP_???"; tprint_shift(); PRINT_VAL_U(24); tprint_shift_end(); tprints_comment(comment); tprint_flags_or(); PRINT_VAL_X(val3 & 0xfff); tprint_flags_end(); break; case FUTEX_WAIT_REQUEUE_PI: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); print_ts(tcp, timeout); tprint_arg_next(); printaddr(uaddr2); break; case FUTEX_FD: case FUTEX_WAKE: tprint_arg_next(); PRINT_VAL_U(val); break; case FUTEX_UNLOCK_PI: case FUTEX_TRYLOCK_PI: break; default: tprint_arg_next(); PRINT_VAL_U(val); tprint_arg_next(); printaddr(timeout); tprint_arg_next(); printaddr(uaddr2); tprint_arg_next(); PRINT_VAL_X(val3); break; } return RVAL_DECODED; } #if HAVE_ARCH_TIME32_SYSCALLS SYS_FUNC(futex_time32) { return do_futex(tcp, print_timespec32); } #endif SYS_FUNC(futex_time64) { return do_futex(tcp, print_timespec64); }