58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2013-2016 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef SYMBOL_PREFIX
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#define SYMBOL(str) SYMBOL_PREFIX #str
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#else
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#define SYMBOL(str) #str
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#endif
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/* `set_point' further below is the label where we'll set tracepoints
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at. The insn at the label must the large enough to fit a fast
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tracepoint jump. */
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#if (defined __x86_64__ || defined __i386__)
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# define NOP " .byte 0xe9,0x00,0x00,0x00,0x00\n" /* jmp $+5 (5-byte nop) */
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#elif (defined __aarch64__)
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# define NOP " nop\n"
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#else
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# define NOP "" /* port me */
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#endif
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int
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main(void)
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{
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/* Note: 'volatile' is used to make sure the compiler doesn't
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optimize out these variables. We want to be sure instructions
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are generated for accesses. */
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volatile int i = 0;
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/* Generate a single line with a label in the middle where we can
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place either a trap tracepoint or a fast tracepoint. */
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#define LINE_WITH_FAST_TRACEPOINT \
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do { \
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i = 1; \
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asm (" .global " SYMBOL (set_point) "\n" \
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SYMBOL (set_point) ":\n" \
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NOP \
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); \
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i = 2; \
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} while (0)
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LINE_WITH_FAST_TRACEPOINT; /* location 1 */
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return 0;
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}
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