jasonmolenda created this revision.
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In https://reviews.llvm.org/D136620 I needed to access fp/sp/pc/lr two
different ways depending on the compile-time environment -- the headers name
these registers differently, and the types are different so one of them needs
to be cast. This was tiresome, so instead I indexed off of the array of
general purpose registers right before them. ASAN expresses its displeasure
with this shortcut.
Before my original patch, this code passed the register context in to the
arm_thread_state64_get{sp,fp,lr,pc} and those macros handled this detail.
The ASAN CI bot does not build an in-tree debugserver and test with it, but
when I looked into a bot test failure, I hit this first.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D140067
Files:
lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
Index: lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
===================================================================
--- lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
+++ lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
@@ -2022,8 +2022,29 @@
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]);
+#if __has_feature(ptrauth_calls) && defined(__LP64__)
+ if (reg == gpr_pc)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_pc));
+ else if (reg == gpr_lr)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_lr));
+ else if (reg == gpr_sp)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_sp));
+ else if (reg == gpr_fp)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_fp));
+#else
+ if (reg == gpr_pc)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__pc);
+ else if (reg == gpr_lr)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__lr);
+ else if (reg == gpr_sp)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__sp);
+ else if (reg == gpr_fp)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__fp);
+#endif
else
value->value.uint64 = m_state.context.gpr.__x[reg];
return true;
Index: lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
===================================================================
--- lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
+++ lldb/tools/debugserver/source/MacOSX/arm64/DNBArchImplARM64.cpp
@@ -2022,8 +2022,29 @@
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]);
+#if __has_feature(ptrauth_calls) && defined(__LP64__)
+ if (reg == gpr_pc)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_pc));
+ else if (reg == gpr_lr)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_lr));
+ else if (reg == gpr_sp)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_sp));
+ else if (reg == gpr_fp)
+ value->value.uint64 = clear_pac_bits(
+ reinterpret_cast<uint64_t>(m_state.context.gpr.__opaque_fp));
+#else
+ if (reg == gpr_pc)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__pc);
+ else if (reg == gpr_lr)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__lr);
+ else if (reg == gpr_sp)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__sp);
+ else if (reg == gpr_fp)
+ value->value.uint64 = clear_pac_bits(m_state.context.gpr.__fp);
+#endif
else
value->value.uint64 = m_state.context.gpr.__x[reg];
return true;
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