Implement new DEX PC lookup scheme.
GDB wasn't handling the old one gracefully.
- Create a RegsInfo structure that can be used to properly eval expression
data.
- Remove the versions on Dwarf ops. It doesn't work the in the real world
and doesn't add useful information.
- Fix dex pc frame number bug.
Test: testrunner.py -j40 --host --cdex-fast -t 137
Test: libunwindstack_test
Test: All unit tests pass.
Change-Id: Iac4fea651b81cb6087fd237a9a5027a352a49245
diff --git a/libunwindstack/RegsInfo.h b/libunwindstack/RegsInfo.h
new file mode 100644
index 0000000..47825f5
--- /dev/null
+++ b/libunwindstack/RegsInfo.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _LIBUNWINDSTACK_REGS_INFO_H
+#define _LIBUNWINDSTACK_REGS_INFO_H
+
+#include <stdint.h>
+
+#include <unwindstack/Regs.h>
+
+namespace unwindstack {
+
+template <typename AddressType>
+struct RegsInfo {
+ RegsInfo(RegsImpl<AddressType>* regs) : regs(regs) {}
+
+ RegsImpl<AddressType>* regs = nullptr;
+ uint64_t saved_reg_map = 0;
+ AddressType saved_regs[64];
+
+ inline AddressType Get(uint32_t reg) {
+ if (IsSaved(reg)) {
+ return saved_regs[reg];
+ }
+ return (*regs)[reg];
+ }
+
+ inline AddressType* Save(uint32_t reg) {
+ if (reg > sizeof(saved_regs) / sizeof(AddressType)) {
+ // This should never happen as since all currently supported
+ // architectures have the total number of registers < 64.
+ abort();
+ }
+ saved_reg_map |= 1 << reg;
+ saved_regs[reg] = (*regs)[reg];
+ return &(*regs)[reg];
+ }
+
+ inline bool IsSaved(uint32_t reg) {
+ if (reg > sizeof(saved_regs) / sizeof(AddressType)) {
+ // This should never happen as since all currently supported
+ // architectures have the total number of registers < 64.
+ abort();
+ }
+ return saved_reg_map & (1 << reg);
+ }
+
+ inline uint16_t Total() { return regs->total_regs(); }
+};
+
+} // namespace unwindstack
+
+#endif // _LIBUNWINDSTACK_REGS_INFO_H