65 lines
2.2 KiB
ArmAsm
65 lines
2.2 KiB
ArmAsm
# REQUIRES: x86
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# RUN: rm -rf %t; split-file %s %t
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## This is a regression test. Previously, we would emit a bogus LSDA pointer if
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## the following conditions held:
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## * ICF and dead-strip were both done
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## * There exist two functions different compact unwind encodings, but the
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## same LSDA
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##
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## Essentially, we'd neglected to canonicalize the LSDA pointer after ICF, but
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## the broken output would only appear if the compact unwind entry that pointed
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## to it was not itself folded.
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# 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
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# RUN: %lld -dylib -dead_strip --icf=all %t/test.o -o %t/test
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# RUN: llvm-objdump --macho --syms --unwind-info %t/test | FileCheck %s
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# CHECK: SYMBOL TABLE:
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## Sanity check: Verify that the LSDAs are dedup'ed
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# CHECK-NEXT: [[#%.16x, EXC:]] l O __TEXT,__gcc_except_tab _exception0
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# CHECK-NEXT: [[#EXC]] l O __TEXT,__gcc_except_tab _exception1
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## But that the functions themselves aren't
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# CHECK-NEXT: [[#%.16x, FOO:]] g F __TEXT,__text _foo
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# CHECK-NEXT: [[#%.16x, BAR:FOO + 1]] g F __TEXT,__text _bar
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## _foo and _bar should share the same LSDA. We would previously emit a bogus
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## address for _bar's LSDA.
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# CHECK: Contents of __unwind_info section:
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# CHECK: LSDA descriptors:
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# CHECK-NEXT: [0]: function offset=0x[[#%.8x, FOO]], LSDA offset=0x[[#%.8x, EXC]]
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# CHECK-NEXT: [1]: function offset=0x[[#%.8x, BAR]], LSDA offset=0x[[#%.8x, EXC]]
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## But there should be two distinct encodings, one for each function
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# CHECK: Second level indices:
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# CHECK-NEXT: Second level index[0]:
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# CHECK-NEXT: [0]: function offset=0x[[#%.8x, FOO]], encoding[0]=0x42020000
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# CHECK-NEXT: [1]: function offset=0x[[#%.8x, BAR]], encoding[1]=0x42010000
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#--- test.s
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.text
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.globl _foo, _bar
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_foo:
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.cfi_startproc
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.cfi_lsda 16, _exception0
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.cfi_def_cfa_offset 16
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ret
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.cfi_endproc
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_bar:
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.cfi_startproc
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.cfi_lsda 16, _exception1
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.cfi_def_cfa_offset 8 ## ensure _bar's CUE doesn't get folded with _foo's
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ret
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.cfi_endproc
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.section __TEXT,__gcc_except_tab
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_exception0:
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.quad 0x1234
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_exception1:
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.quad 0x1234
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.subsections_via_symbols
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