tree a80f58cda7e07d38ad105a6f8743ac48b1ada05b
parent d4e78b06a146e17cb0b8913bd5694439c3093c5f
author Matt Davis <Matthew.Davis@sony.com> 1550188235 +0000
committer Matt Davis <Matthew.Davis@sony.com> 1550188235 +0000

[symbolizer] Avoid collecting symbols belonging to invalid sections.

Summary:
llvm-symbolizer would originally report symbols that belonged to an invalid object file section.
Specifically the case where: `*Symbol.getSection() == ObjFile.section_end()`
This patch prevents the Symbolizer from collecting symbols that belong to invalid sections.

The test  (from PR40591) introduces a case where two symbols have address 0,
one symbol is defined, 'foo', and the other is not defined, 'bar'.  This patch will cause
the Symbolizer to keep 'foo' and ignore 'bar'.

As a side note, the logic for adding symbols to the Symbolizer's store
(`SymbolizableObjectFile::addSymbol`) replaces symbols with the
same <address, size> pair.  At some point that logic should be revisited as in the
aforementioned case, 'bar' was overwriting 'foo' in the Symbolizer's store,
and 'foo' was forgotten.

This fixes PR40591

Reviewers: jhenderson, rupprecht

Reviewed By: rupprecht

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58146

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354083 91177308-0d34-0410-b5e6-96231b3b80d8