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194 lines
6.7 KiB
C
194 lines
6.7 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003-2004 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/* This file tests corner-cases of unwinding across multiple stacks.
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In particular, it verifies that the extreme case with a frame of 96
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stacked registers that are all backed up by separate stacks works
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as expected. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <libunwind.h>
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#include "ia64-test-rbs.h"
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#define panic(args...) \
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do { fprintf (stderr, args); ++nerrors; return -9999; } while (0)
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#define NELEMS(a) ((int) (sizeof (a) / sizeof ((a)[0])))
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/* The loadrs field in ar.rsc is 14 bits wide, which limits all ia64
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implementations to at most 2048 physical stacked registers
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(actually, slightly less than that, because loadrs also counts RNaT
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slots). Since we can dirty 93 stacked registers per recursion, we
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need to recurse RECURSION_DEPTH times to ensure all physical
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stacked registers are in use. */
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#define MAX_PHYS_STACKED 2048
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#define RECURSION_DEPTH ((MAX_PHYS_STACKED + 92) / 93)
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typedef int spill_func_t (long iteration, int (*next_func[])());
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extern int loadup (long iteration, int *values, int (*next_func[])());
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extern char resumption_point_label;
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#define DCL(n) \
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extern int rbs_spill_##n (long iteration, int (*next_func[])())
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DCL(2); DCL(3); DCL(4); DCL(5); DCL(6); DCL(7);
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DCL(8); DCL(9); DCL(10); DCL(11); DCL(12); DCL(13); DCL(14); DCL(15);
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DCL(16); DCL(17); DCL(18); DCL(19); DCL(20); DCL(21); DCL(22); DCL(23);
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DCL(24); DCL(25); DCL(26); DCL(27); DCL(28); DCL(29); DCL(30); DCL(31);
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DCL(32); DCL(33); DCL(34); DCL(35); DCL(36); DCL(37); DCL(38); DCL(39);
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DCL(40); DCL(41); DCL(42); DCL(43); DCL(44); DCL(45); DCL(46); DCL(47);
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DCL(48); DCL(49); DCL(50); DCL(51); DCL(52); DCL(53); DCL(54); DCL(55);
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DCL(56); DCL(57); DCL(58); DCL(59); DCL(60); DCL(61); DCL(62); DCL(63);
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DCL(64); DCL(65); DCL(66); DCL(67); DCL(68); DCL(69); DCL(70); DCL(71);
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DCL(72); DCL(73); DCL(74); DCL(75); DCL(76); DCL(77); DCL(78); DCL(79);
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DCL(80); DCL(81); DCL(82); DCL(83); DCL(84); DCL(85); DCL(86); DCL(87);
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DCL(88); DCL(89); DCL(90); DCL(91); DCL(92); DCL(93); DCL(94);
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#define SPL(n) rbs_spill_##n
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spill_func_t *spill_funcs[] =
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{
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SPL(2), SPL(3), SPL(4), SPL(5), SPL(6), SPL(7),
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SPL(8), SPL(9), SPL(10), SPL(11), SPL(12), SPL(13), SPL(14), SPL(15),
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SPL(16), SPL(17), SPL(18), SPL(19), SPL(20), SPL(21), SPL(22), SPL(23),
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SPL(24), SPL(25), SPL(26), SPL(27), SPL(28), SPL(29), SPL(30), SPL(31),
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SPL(32), SPL(33), SPL(34), SPL(35), SPL(36), SPL(37), SPL(38), SPL(39),
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SPL(40), SPL(41), SPL(42), SPL(43), SPL(44), SPL(45), SPL(46), SPL(47),
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SPL(48), SPL(49), SPL(50), SPL(51), SPL(52), SPL(53), SPL(54), SPL(55),
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SPL(56), SPL(57), SPL(58), SPL(59), SPL(60), SPL(61), SPL(62), SPL(63),
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SPL(64), SPL(65), SPL(66), SPL(67), SPL(68), SPL(69), SPL(70), SPL(71),
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SPL(72), SPL(73), SPL(74), SPL(75), SPL(76), SPL(77), SPL(78), SPL(79),
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SPL(80), SPL(81), SPL(82), SPL(83), SPL(84), SPL(85), SPL(86), SPL(87),
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SPL(88), SPL(89), SPL(90), SPL(91), SPL(92), SPL(93), SPL(94)
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};
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static int verbose;
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static int nerrors;
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static int unwind_count;
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static int
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unwind_and_resume (long iteration, int (*next_func[])())
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{
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unw_context_t uc;
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unw_cursor_t c;
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unw_word_t ip;
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int i, ret;
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if (verbose)
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printf (" %s(iteration=%ld, next_func=%p)\n",
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__FUNCTION__, iteration, next_func);
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unw_getcontext (&uc);
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if ((ret = unw_init_local (&c, &uc)) < 0)
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panic ("unw_init_local (ret=%d)", ret);
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for (i = 0; i < unwind_count; ++i)
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if ((ret = unw_step (&c)) < 0)
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panic ("unw_step (ret=%d)", ret);
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if (unw_get_reg (&c, UNW_REG_IP, &ip) < 0
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|| unw_set_reg (&c, UNW_REG_IP, (unw_word_t) &resumption_point_label) < 0
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|| unw_set_reg (&c, UNW_REG_EH + 0, 0) /* ret val */
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|| unw_set_reg (&c, UNW_REG_EH + 1, ip))
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panic ("failed to redirect to resumption_point\n");
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if (verbose)
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{
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unw_word_t bsp;
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if (unw_get_reg (&c, UNW_IA64_BSP, &bsp) < 0)
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panic ("unw_get_reg() failed\n");
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printf (" bsp=%lx, old ip=%lx, new ip=%p\n", bsp,
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ip, &resumption_point_label);
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}
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ret = unw_resume (&c);
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panic ("unw_resume() returned (ret=%d)!!\n", ret);
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return 0;
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}
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static int
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run_check (int test)
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{
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int nfuncs, nspills, n, ret, i, reg_values[88];
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spill_func_t *func[NSTACKS + 1];
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/* First, generate a set of 88 random values which loadup() will load
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into loc2-loc89 (r37-r124). */
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for (i = 0; i < NELEMS (reg_values); ++i)
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{
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reg_values[i] = random ();
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/* Generate NaTs with a reasonably probability (1/16th): */
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if (reg_values[i] < 0x10000000)
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reg_values[i] = 0;
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}
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nspills = 0;
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nfuncs = 0;
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do
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{
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n = random () % NELEMS (spill_funcs);
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func[nfuncs++] = spill_funcs[n];
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nspills += 2 + n;
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}
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while (nspills < 128);
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func[nfuncs++] = unwind_and_resume;
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unwind_count = 1 + (random () % (nfuncs + RECURSION_DEPTH - 1));
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if (verbose)
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printf ("test%d: nfuncs=%d, unwind_count=%d\n",
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test, nfuncs, unwind_count);
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ret = loadup (RECURSION_DEPTH, reg_values, func);
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if (ret < 0)
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panic ("test%d: load() returned %d\n", test, ret);
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else if (ret != RECURSION_DEPTH + nfuncs - unwind_count)
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panic ("test%d: resumed wrong frame: expected %d, got %d\n",
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test, RECURSION_DEPTH + nfuncs - unwind_count, ret);
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return 0;
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}
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int
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main (int argc, char **argv)
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{
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int i;
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if (argc > 1)
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verbose = 1;
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for (i = 0; i < 100000; ++i)
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run_check (i + 1);
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if (nerrors > 0)
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{
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fprintf (stderr, "FAILURE: detected %d errors\n", nerrors);
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exit (-1);
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}
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if (verbose)
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printf ("SUCCESS.\n");
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return 0;
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}
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