| # REQUIRES: x86 |
| |
| # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos %s -o %t.o |
| # RUN: %lld -lSystem -dead_strip -why_live _foo -why_live _undef -U _undef \ |
| # RUN: -why_live _support -why_live _support_refs_dylib_fun \ |
| # RUN: -why_live _abs %t.o -o /dev/null 2>&1 | FileCheck %s |
| |
| ## Due to an implementation detail, LLD is not able to report -why_live info for |
| ## absolute symbols. (ld64 has the same shortcoming.) |
| # CHECK-NOT: _abs |
| # CHECK: _foo from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _quux from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _undef from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _main from {{.*}}why-live.s.tmp.o |
| ## Our handling of live_support sections can be improved... we should print the |
| ## dylib symbol that keeps _support_refs_dylib_fun alive, instead of printing |
| ## the live_support symbol's name itself. (ld64 seems to have the same issue.) |
| # CHECK-NEXT: _support_refs_dylib_fun from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _support_refs_dylib_fun from {{.*}}why-live.s.tmp.o |
| ## Again, this can be improved: we shouldn't be printing _support twice. (ld64 |
| ## seems to have the same issue.) |
| # CHECK-NEXT: _support from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _support from {{.*}}why-live.s.tmp.o |
| # CHECK-NEXT: _foo from {{.*}}why-live.s.tmp.o |
| # CHECK-EMPTY: |
| |
| .text |
| _foo: |
| retq |
| |
| _bar: |
| retq |
| |
| _baz: |
| callq _foo |
| retq |
| |
| .no_dead_strip _quux |
| _quux: |
| callq _foo |
| retq |
| |
| .globl _main |
| _main: |
| callq _foo |
| callq _baz |
| callq _undef |
| callq ___isnan |
| retq |
| |
| .globl _abs |
| _abs = 0x1000 |
| |
| .section __TEXT,support,regular,live_support |
| _support: |
| callq _foo |
| callq _abs |
| retq |
| |
| _support_refs_dylib_fun: |
| callq ___isnan |
| retq |
| |
| .subsections_via_symbols |