[Lldb-commits] [lldb] da4e827 - Don't read off end of GPR register array to access fp/sp/lr/pc
Jason Molenda via lldb-commits
lldb-commits at lists.llvm.org
Wed Jan 4 13:51:33 PST 2023
Author: Jason Molenda
Date: 2023-01-04T13:51:26-08:00
New Revision: da4e82753f3130ca2ff973ad90092ad1c035038a
URL: https://github.com/llvm/llvm-project/commit/da4e82753f3130ca2ff973ad90092ad1c035038a
DIFF: https://github.com/llvm/llvm-project/commit/da4e82753f3130ca2ff973ad90092ad1c035038a.diff
LOG: Don't read off end of GPR register array to access fp/sp/lr/pc
The arm64 register context on Darwin has the 29 general purpose
registers, then pc/sp/lr/fp with different field names depending
on compile-time flags. Instead of accessing beyond the end of
the uint64_t[29] array, and upsetting the sanitizers, access those
registers correctly with the correct name.
Fixes a test failure on the ASAN CI bot, currently being
skipped, in TestEarlyProcessLaunch.py.
Differential Revision: https://reviews.llvm.org/D140067
rdar://103359354
Added:
Modified:
lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
Removed:
################################################################################
diff --git a/lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp b/lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
index 5a8a256948023..c195a145c3be4 100644
--- a/lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
+++ b/lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
@@ -2022,10 +2022,41 @@ bool DNBArchMachARM64::GetRegisterValue(uint32_t set, uint32_t reg,
switch (set) {
case e_regSetGPR:
if (reg <= gpr_pc) {
- if (reg == gpr_pc || reg == gpr_lr || reg == gpr_sp || reg == gpr_fp)
- value->value.uint64 = clear_pac_bits(m_state.context.gpr.__x[reg]);
- else
+ switch (reg) {
+#if __has_feature(ptrauth_calls) && defined(__LP64__)
+ case gpr_pc:
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_pc));
+ break;
+ case gpr_lr:
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_lr));
+ break;
+ case gpr_sp:
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_sp));
+ break;
+ case gpr_fp:
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_fp));
+ break;
+#else
+ case gpr_pc:
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__pc);
+ break;
+ case gpr_lr:
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__lr);
+ break;
+ case gpr_sp:
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__sp);
+ break;
+ case gpr_fp:
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__fp);
+ break;
+#endif
+ default:
value->value.uint64 = m_state.context.gpr.__x[reg];
+ }
return true;
} else if (reg == gpr_cpsr) {
value->value.uint32 = m_state.context.gpr.__cpsr;
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