https://bugs.llvm.org/show_bug.cgi?id=52362
Bug ID: 52362
Summary: debugserver: ignores P packets when setting AVX-2 and
AVX-512 registers
Product: lldb
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: lldb-dev@lists.llvm.org
Reporter: alessandro.arzi...@gmail.com
CC: jdevliegh...@apple.com, llvm-b...@lists.llvm.org
Sending a P packet to debugserver to change the value of a AVX-2 or AVX-512
register will appear to work:
request:
$P5b=cdcccccccccc0840000000000000000000000000000000000000000000000000;thread:39d025;#24
response: $OK#00
but the new register value will not be written to the target process.
This happens because DNBArchImplX86_64::SetRegisterValue at line 2635:
https://github.com/llvm/llvm-project/blob/2c4a9e830cbb3b91a57902f7ecd508c544701819/lldb/tools/debugserver/source/MacOSX/x86_64/DNBArchImplX86_64.cpp#L2635
returns directly instead of setting success to true and allowing the call to
SetRegisterState to happen.
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