1# REQUIRES: x86 2# RUN: rm -rf %t; split-file %s %t 3 4## This is a regression test. Previously, we would emit a bogus LSDA pointer if 5## the following conditions held: 6## * ICF and dead-strip were both done 7## * There exist two functions different compact unwind encodings, but the 8## same LSDA 9## 10## Essentially, we'd neglected to canonicalize the LSDA pointer after ICF, but 11## the broken output would only appear if the compact unwind entry that pointed 12## to it was not itself folded. 13 14# RUN: llvm-mc -emit-compact-unwind-non-canonical=true -filetype=obj -triple=x86_64-apple-darwin19.0.0 %t/test.s -o %t/test.o 15# RUN: %lld -dylib -dead_strip --icf=all %t/test.o -o %t/test 16# RUN: llvm-objdump --macho --syms --unwind-info %t/test | FileCheck %s 17 18# CHECK: SYMBOL TABLE: 19## Sanity check: Verify that the LSDAs are dedup'ed 20# CHECK-NEXT: [[#%.16x, EXC:]] l O __TEXT,__gcc_except_tab _exception0 21# CHECK-NEXT: [[#EXC]] l O __TEXT,__gcc_except_tab _exception1 22## But that the functions themselves aren't 23# CHECK-NEXT: [[#%.16x, FOO:]] g F __TEXT,__text _foo 24# CHECK-NEXT: [[#%.16x, BAR:FOO + 1]] g F __TEXT,__text _bar 25 26## _foo and _bar should share the same LSDA. We would previously emit a bogus 27## address for _bar's LSDA. 28# CHECK: Contents of __unwind_info section: 29# CHECK: LSDA descriptors: 30# CHECK-NEXT: [0]: function offset=0x[[#%.8x, FOO]], LSDA offset=0x[[#%.8x, EXC]] 31# CHECK-NEXT: [1]: function offset=0x[[#%.8x, BAR]], LSDA offset=0x[[#%.8x, EXC]] 32 33## But there should be two distinct encodings, one for each function 34# CHECK: Second level indices: 35# CHECK-NEXT: Second level index[0]: 36# CHECK-NEXT: [0]: function offset=0x[[#%.8x, FOO]], encoding[0]=0x42020000 37# CHECK-NEXT: [1]: function offset=0x[[#%.8x, BAR]], encoding[1]=0x42010000 38 39#--- test.s 40.text 41.globl _foo, _bar 42 43_foo: 44 .cfi_startproc 45 .cfi_lsda 16, _exception0 46 .cfi_def_cfa_offset 16 47 ret 48 .cfi_endproc 49 50_bar: 51 .cfi_startproc 52 .cfi_lsda 16, _exception1 53 .cfi_def_cfa_offset 8 ## ensure _bar's CUE doesn't get folded with _foo's 54 ret 55 .cfi_endproc 56 57.section __TEXT,__gcc_except_tab 58 59_exception0: 60 .quad 0x1234 61 62_exception1: 63 .quad 0x1234 64 65.subsections_via_symbols 66