1 // RUN: dsymutil --linker parallel --no-odr -f -y %p/../dummy-debug-map.map -oso-prepend-path \
2 // RUN: %p/../../Inputs/dead-stripped -o - | llvm-dwarfdump - --debug-info | \
3 // RUN: FileCheck %s --implicit-check-not \
4 // RUN: "{{DW_AT_low_pc|DW_AT_high_pc|DW_AT_location|DW_TAG|NULL}}"
5 //
6 // RUN: dsymutil --linker parallel -f -y %p/../dummy-debug-map.map -oso-prepend-path \
7 // RUN: %p/../../Inputs/dead-stripped -o - | llvm-dwarfdump - --debug-info | \
8 // RUN: FileCheck %s --implicit-check-not \
9 // RUN: "{{DW_AT_low_pc|DW_AT_high_pc|DW_AT_location|DW_TAG|NULL}}" \
10 // RUN: --check-prefixes=CHECK-LLVM
11
12 // The test was compiled with:
13 // clang++ -O2 -g -c dead-strip.cpp -o 1.o
14
15 // The goal of the test is to exercise dsymutil's behavior in presence of
16 // functions/variables that have been dead-stripped by the linker but
17 // that are still present in the linked debug info (in this case because
18 // they have been DW_TAG_import'd in another namespace).
19
20 // CHECK-LLVM: DW_TAG_compile_unit
21 // CHECK-LLVM: DW_AT_name{{.*}}"__artificial_type_unit"
22 // CHECK-LLVM: DW_TAG_namespace
23 // CHECK-LLVM: DW_AT_name{{.*}}"N"
24 // CHECK-LLVM: NULL
25 //
26 // CHECK-LLVM: DW_TAG_compile_unit
27 // CHECK-LLVM: DW_AT_low_pc
28 // CHECK-LLVM: DW_AT_high_pc
29 // CHECK-LLVM: DW_TAG_base_type
30 // CHECK-LLVM: DW_TAG_imported_module
31 // CHECK-LLVM: DW_TAG_subprogram
32 // CHECK-LLVM: DW_AT_low_pc
33 // CHECK-LLVM: DW_AT_high_pc
34 // CHECK-LLVM: DW_TAG_base_type
35 // CHECK-LLVM: NULL
36
37 // Everything in the N namespace below doesn't have a debug map entry, and
38 // thus is considered dead (::foo() has a debug map entry, otherwise dsymutil
39 // would just drop the CU altogether).
40
41 // CHECK: DW_TAG_compile_unit
42 // CHECK: DW_AT_low_pc
43 // CHECK: DW_AT_high_pc
44 // CHECK: DW_TAG_namespace
45 namespace N {
46 int blah = 42;
47
foo()48 __attribute__((always_inline)) int foo() { return blah; }
49
bar(unsigned i)50 int bar(unsigned i) {
51 int val = foo();
52 if (i)
53 return val + bar(i-1);
54 return foo();
55 }
56 }
57 // CHECK: DW_TAG_base_type
58 // CHECK: DW_TAG_imported_module
59 // CHECK: DW_TAG_subprogram
60 // CHECK: DW_AT_low_pc
61 // CHECK: DW_AT_high_pc
62 // CHECK: DW_TAG_base_type
63 // CHECK: NULL
64
65 using namespace N;
66
foo()67 void foo() {}
68