26 lines
1.0 KiB
Diff
26 lines
1.0 KiB
Diff
rhbz1965455
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commit 212576147 (refs/bisect/new)
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Author: Xiaozhu Meng <mxz297@gmail.com>
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Date: Wed May 26 11:26:28 2021 -0500
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Skip parsing of blocks whose code buffer is null (#1033)
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--- dyninst-11.0.0/parseAPI/src/Parser.C.orig
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+++ dyninst-11.0.0/parseAPI/src/Parser.C
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@@ -1703,6 +1703,14 @@ Parser::parse_frame_one_iteration(ParseFrame &frame, bool recursive) {
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cur->region()->offset() + cur->region()->length() - curAddr;
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const unsigned char* bufferBegin =
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(const unsigned char *)(func->region()->getPtrToInstruction(curAddr));
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+ if (bufferBegin == nullptr) {
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+ // This can happen if jump table is over-approxiated.
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+ // We ignore this block for now, and later the over-approximated block
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+ // will be removed.
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+ parsing_printf("\taddress %lx in a different region from the funcion entry at %lx, skip parsing\n", curAddr, func->addr());
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+ continue;
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+ }
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+
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InstructionDecoder dec(bufferBegin,size,frame.codereg->getArch());
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if (!ahPtr)
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