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[mac] Teach dump_syms to handle additional zerofill sections

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This patch allows dump_syms to handle S_THREAD_LOCAL_ZEROFILL
and S_GB_ZEROFILL section in the same way as the more common
S_ZEROFILL section.  Previously, dump_syms would fail to dump
a binary containing a __DATA,__thread_bss section, because it
tried to look up its data (and failed).

R=mark@chromium.org

Review URL: https://codereview.chromium.org/1369233003 .

Patch from Pavel Labath <labath@google.com>.
This commit is contained in:
Pavel Labath 2015-09-30 08:20:42 -04:00 committed by Mark Mentovai
parent 679d70f50b
commit 01c8f7cf46
1 changed files with 3 additions and 1 deletions
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4
src/common/mac/macho_reader.cc
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@ -481,7 +481,9 @@ bool Reader::WalkSegmentSections(const Segment &segment,
reporter_->SectionsMissing(segment.name);
return false;
}
if ((section.flags & SECTION_TYPE) == S_ZEROFILL) {
const uint32_t section_type = section.flags & SECTION_TYPE;
if (section_type == S_ZEROFILL || section_type == S_THREAD_LOCAL_ZEROFILL ||
section_type == S_GB_ZEROFILL) {
// Zero-fill sections have a size, but no contents.
section.contents.start = section.contents.end = NULL;
} else if (segment.contents.start == NULL &&