Support Linux signal return trampolines in frame initialization
Summary:
Add __kernel_rt_sigreturn to the list of trap handlers for Linux (it's
used as such on aarch64 at least), and __restore_rt as well (used on
x86_64).
Skip decrement-and-recompute for trap handlers in
InitializeNonZerothFrame, as signal dispatch may point the child frame's
return address to the start of the return trampoline.
Parse the 'S' flag for signal handlers from eh_frame augmentation, and
propagate it to the unwind plan.
Reviewers: labath, jankratochvil, compnerd, jfb, jasonmolenda
Reviewed By: jasonmolenda
Subscribers: clayborg, MaskRay, wuzish, nemanjai, kbarton, jrtc27, atanasyan, jsji, javed.absar, kristof.beyls, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D63667
llvm-svn: 366580
diff --git a/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp b/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp
index d425827..5e275e3 100644
--- a/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp
+++ b/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp
@@ -495,6 +495,7 @@
auto plan_sp = std::make_shared<UnwindPlan>(lldb::eRegisterKindLLDB);
plan_sp->SetSourceName("breakpad STACK CFI");
plan_sp->SetUnwindPlanValidAtAllInstructions(eLazyBoolNo);
+ plan_sp->SetUnwindPlanForSignalTrap(eLazyBoolNo);
plan_sp->SetSourcedFromCompiler(eLazyBoolYes);
plan_sp->SetPlanValidAddressRange(
AddressRange(base + init_record->Address, *init_record->Size,