0029f21482
Currently LLD sets OutSecOff in addSection for input sections. That is a fake offset (just a rude approximation to remember the order), used for sorting SHF_LINK_ORDER sections (see resolveShfLinkOrder, compareByFilePosition). There are 2 problems with such approach: 1. We currently change and reuse Size field as a value assigned. Changing size is not good because leads to bugs. Currently, SIZEOF(.bss) for empty .bss returns 2 because we add two empty synthetic sections and increase size twice by 1. (See PR37011: https://bugs.llvm.org/show_bug.cgi?id=37011) 2. Such approach simply does not work when --symbol-ordering-file is involved, because processing of the ordering file might break the initial section order. This fixes PR37011. Differential revision: https://reviews.llvm.org/D45368 llvm-svn: 329560
18 lines
524 B
Plaintext
18 lines
524 B
Plaintext
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux /dev/null -o %t.o
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# RUN: ld.lld %t.o --script %s -o %t1
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# RUN: llvm-readobj -symbols %t1 | FileCheck %s
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## We had a bug when LLD increased the size of the output section even
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## if it was empty. That happened because of empty synthetic sections included.
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## Here we check that size of empty output section is zero.
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# CHECK: Name: foo
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# CHECK-NEXT: Value: 0x0
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SECTIONS {
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. = 0x1000;
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.bss : { *(.bss*) *(COMMON) }
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foo = SIZEOF(.bss);
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}
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