From 441410be471d5d0a5d1d47cf363de155e397a0c2 Mon Sep 17 00:00:00 2001 From: Alex Richardson Date: Wed, 15 Jan 2020 14:32:14 +0000 Subject: [PATCH] [ELF] Avoid false-positive assert in getErrPlace() This assertion was added as part of D70659 but did not account for .bss input sections. I noticed that this assert was incorrectly triggering while building FreeBSD for MIPS64. Fixed by relaxing the assert to also account for SHT_NOBITS input sections and adjust the test mips-jalr-non-function.s to link a file with a .bss section first. Reviewed By: MaskRay, grimar Differential Revision: https://reviews.llvm.org/D72567 --- lld/ELF/Target.cpp | 2 +- lld/test/ELF/mips-jalr-non-functions.s | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/lld/ELF/Target.cpp b/lld/ELF/Target.cpp index 70a68fd..d3899d0 100644 --- a/lld/ELF/Target.cpp +++ b/lld/ELF/Target.cpp @@ -95,7 +95,7 @@ template static ErrorPlace getErrPlace(const uint8_t *loc) { assert(loc != nullptr); for (InputSectionBase *d : inputSections) { auto *isec = cast(d); - if (!isec->getParent()) + if (!isec->getParent() || (isec->type & SHT_NOBITS)) continue; const uint8_t *isecLoc = diff --git a/lld/test/ELF/mips-jalr-non-functions.s b/lld/test/ELF/mips-jalr-non-functions.s index cdb60cd..70f899c 100644 --- a/lld/test/ELF/mips-jalr-non-functions.s +++ b/lld/test/ELF/mips-jalr-non-functions.s @@ -6,7 +6,12 @@ ## relocations to avoid generating binaries that crash when executed. # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux %s -o %t.o -# RUN: ld.lld -shared %t.o -o %t.so 2>&1 | FileCheck %s -check-prefix WARNING-MESSAGE +## Link in another object file with a .bss as a regression test: +## Previously LLD asserted when skipping over .bss sections when determining the +## location for a warning/error message. By adding another file with a .bss +## section before the actual %t.o we can reproduce this case. +# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux %S/Inputs/common.s -o %t-common.o +# RUN: ld.lld -shared %t-common.o %t.o -o %t.so 2>&1 | FileCheck %s -check-prefix WARNING-MESSAGE # RUN: llvm-objdump --no-show-raw-insn --no-leading-addr -d %t.so | FileCheck %s .set noreorder -- 2.7.4