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fuzz: add mangled object name to linker script

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Previously, we relied on "FuzzerTracePC*(.bss*)" to place libfuzzer's
fuzzer::TPC object into our contiguous shared-memory region. This does
not work for some libfuzzer builds, so this addition identifies the
region by its mangled name: *(.bss._ZN6fuzzer3TPCE);

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-id: 20200512030133.29896-4-alxndr@bu.edu
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Alexander Bulekov 2020-05-11 23:01:32 -04:00 committed by Stefan Hajnoczi
parent 6851803a46
commit 3b113229c5
1 changed files with 5 additions and 0 deletions
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5
tests/qtest/fuzz/fork_fuzz.ld
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@ -28,6 +28,11 @@ SECTIONS
/* Internal Libfuzzer TracePC object which contains the ValueProfileMap */ /* Internal Libfuzzer TracePC object which contains the ValueProfileMap */
FuzzerTracePC*(.bss*); FuzzerTracePC*(.bss*);
/*
* In case the above line fails, explicitly specify the (mangled) name of
* the object we care about
*/
*(.bss._ZN6fuzzer3TPCE);
} }
.data.fuzz_end : ALIGN(4K) .data.fuzz_end : ALIGN(4K)
{ {