2 # RUN: %clang -target x86_64-pc-linux -g -O0 %S/Inputs/subprogram_ranges.s -o %t.o -c
3 # RUN: ld.lld %t.o -o %t
4 # RUN: %lldb -b -s %s %t 2>&1 | FileCheck %s
6 # Test breaking on symbols and printing variables when a DW_TAG_subprogram uses
7 # DW_AT_ranges instead of DW_AT_low_pc/DW_AT_high_pc. While the assembly here
8 # is a bit unrealistic - it's a single-entry range using DWARFv4 which isn't
9 # useful for anything (a single-entry range with DWARFv5 can reduce address
10 # relocations, and multi-entry ranges can be used for function sections), but
11 # it's the simplest thing to test. If anyone's updating this test at some
12 # point, feel free to replace it with another equivalent test if it's
13 # especially useful, but don't dismiss it as pointless just because it's a bit
16 # * Using volatile writes to create instructions the location may be valid over
17 # * Using two values for the variable so it is described by a location list,
18 # not a single location description
19 # * Not using function calls, so that the function has no frame pointer
20 # initialization/no prologue instructions, so the location of "var" is valid
21 # at the start of the function, so 'image lookup -v -s main' will include it.
24 # __attribute__((nodebug)) volatile int i;
33 # CHECK: (lldb) b main
34 # CHECK-NEXT: Breakpoint 1: where = {{.*}}`main at subprogram_ranges.c:4:5
36 image lookup -v -s main
37 # CHECK: 1 symbols match 'main'
38 # CHECK: Variable: {{.*}}, name = "var", type = "int", {{.*}}, decl = subprogram_ranges.c:3