/* This testcase is part of GDB, the GNU debugger. Copyright 2013-2017 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #ifdef SYMBOL_PREFIX #define SYMBOL(str) SYMBOL_PREFIX #str #else #define SYMBOL(str) #str #endif /* `set_point' further below is the label where we'll set tracepoints at. The insn at the label must the large enough to fit a fast tracepoint jump. */ #if (defined __x86_64__ || defined __i386__) # define NOP " .byte 0xe9,0x00,0x00,0x00,0x00\n" /* jmp $+5 (5-byte nop) */ #elif (defined __aarch64__) # define NOP " nop\n" #else # define NOP "" /* port me */ #endif int main(void) { /* Note: 'volatile' is used to make sure the compiler doesn't optimize out these variables. We want to be sure instructions are generated for accesses. */ volatile int i = 0; /* Generate a single line with a label in the middle where we can place either a trap tracepoint or a fast tracepoint. */ #define LINE_WITH_FAST_TRACEPOINT \ do { \ i = 1; \ asm (" .global " SYMBOL (set_point) "\n" \ SYMBOL (set_point) ":\n" \ NOP \ ); \ i = 2; \ } while (0) LINE_WITH_FAST_TRACEPOINT; /* location 1 */ return 0; }