Add error propagation into Unwinder/Elf objects.
The backtrace offline code uses these error codes to diagnose errors.
In addtion, I've had cases where seeing these errors would help diagnose
failures.
This also allows us to add a few features to indicate why an unwind
terminated (such as max frames exceeded).
Bug: 65682279
Test: Updated unit tests pass.
Change-Id: If82b5092698e8a194016d670efff1320f9b44d50
diff --git a/libunwindstack/DwarfOp.h b/libunwindstack/DwarfOp.h
index c29bf35..40b7b23 100644
--- a/libunwindstack/DwarfOp.h
+++ b/libunwindstack/DwarfOp.h
@@ -24,8 +24,9 @@
#include <type_traits>
#include <vector>
+#include <unwindstack/DwarfError.h>
+
#include "DwarfEncoding.h"
-#include "DwarfError.h"
namespace unwindstack {
@@ -72,7 +73,9 @@
void set_regs(RegsImpl<AddressType>* regs) { regs_ = regs; }
- DwarfError last_error() { return last_error_; }
+ const DwarfErrorData& last_error() { return last_error_; }
+ DwarfErrorCode LastErrorCode() { return last_error_.code; }
+ uint64_t LastErrorAddress() { return last_error_.address; }
bool is_register() { return is_register_; }
@@ -96,7 +99,7 @@
RegsImpl<AddressType>* regs_;
bool is_register_ = false;
- DwarfError last_error_ = DWARF_ERROR_NONE;
+ DwarfErrorData last_error_{DWARF_ERROR_NONE, 0};
uint8_t cur_op_;
std::vector<AddressType> operands_;
std::deque<AddressType> stack_;