Merge "libbacktrace_offline: support .ARM.exidx."
diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index 5c72234..200b6d6 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -117,4 +117,17 @@
},
cflags: ["-O0"],
srcs: ["backtrace_testlib.c"],
-}
+
+ target: {
+ linux: {
+ shared_libs: [
+ "libunwind",
+ ],
+ },
+ android: {
+ shared_libs: [
+ "libunwind",
+ ],
+ },
+ }
+}
\ No newline at end of file
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index 0f01872..f4976e9 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -111,8 +111,6 @@
backtrace_test_ldlibs_host += \
-ldl \
-backtrace_test_strip_module := false
-
module := backtrace_test
module_tag := debug
build_type := target
diff --git a/libbacktrace/BacktraceOffline.cpp b/libbacktrace/BacktraceOffline.cpp
index a05a6d8..9e95563 100644
--- a/libbacktrace/BacktraceOffline.cpp
+++ b/libbacktrace/BacktraceOffline.cpp
@@ -50,6 +50,48 @@
#include "BacktraceLog.h"
+struct EhFrame {
+ uint64_t hdr_vaddr;
+ uint64_t vaddr;
+ uint64_t fde_table_offset;
+ uintptr_t min_func_vaddr;
+ std::vector<uint8_t> hdr_data;
+ std::vector<uint8_t> data;
+};
+
+struct ArmIdxEntry {
+ uint32_t func_offset;
+ uint32_t value;
+};
+
+struct ArmExidx {
+ uint64_t exidx_vaddr;
+ uint64_t extab_vaddr;
+ std::vector<ArmIdxEntry> exidx_data;
+ std::vector<uint8_t> extab_data;
+ // There is a one-to-one map from exidx_data.func_offset to func_vaddr_array.
+ std::vector<uint32_t> func_vaddr_array;
+};
+
+struct DebugFrameInfo {
+ bool has_arm_exidx;
+ bool has_eh_frame;
+ bool has_debug_frame;
+ bool has_gnu_debugdata;
+
+ EhFrame eh_frame;
+ ArmExidx arm_exidx;
+
+ uint64_t min_vaddr;
+ uint64_t text_end_vaddr;
+
+ DebugFrameInfo() : has_arm_exidx(false), has_eh_frame(false),
+ has_debug_frame(false), has_gnu_debugdata(false) { }
+};
+
+static std::unordered_map<std::string, std::unique_ptr<DebugFrameInfo>>& g_debug_frames =
+ *new std::unordered_map<std::string, std::unique_ptr<DebugFrameInfo>>;
+
void Space::Clear() {
start = 0;
end = 0;
@@ -207,23 +249,18 @@
if (read_size != 0) {
return read_size;
}
+ read_size = arm_exidx_space_.Read(addr, buffer, bytes);
+ if (read_size != 0) {
+ return read_size;
+ }
+ read_size = arm_extab_space_.Read(addr, buffer, bytes);
+ if (read_size != 0) {
+ return read_size;
+ }
read_size = stack_space_.Read(addr, buffer, bytes);
return read_size;
}
-static bool FileOffsetToVaddr(
- const std::vector<DebugFrameInfo::EhFrame::ProgramHeader>& program_headers,
- uint64_t file_offset, uint64_t* vaddr) {
- for (auto& header : program_headers) {
- if (file_offset >= header.file_offset && file_offset < header.file_offset + header.file_size) {
- // TODO: Consider load_bias?
- *vaddr = file_offset - header.file_offset + header.vaddr;
- return true;
- }
- }
- return false;
-}
-
bool BacktraceOffline::FindProcInfo(unw_addr_space_t addr_space, uint64_t ip,
unw_proc_info_t* proc_info, int need_unwind_info) {
backtrace_map_t map;
@@ -236,45 +273,90 @@
if (debug_frame == nullptr) {
return false;
}
- if (debug_frame->is_eh_frame) {
- uint64_t ip_offset = ip - map.start + map.offset;
- uint64_t ip_vaddr; // vaddr in the elf file.
- bool result = FileOffsetToVaddr(debug_frame->eh_frame.program_headers, ip_offset, &ip_vaddr);
- if (!result) {
- return false;
- }
- // Calculate the addresses where .eh_frame_hdr and .eh_frame stay when the process was running.
- eh_frame_hdr_space_.start = (ip - ip_vaddr) + debug_frame->eh_frame.eh_frame_hdr_vaddr;
- eh_frame_hdr_space_.end =
- eh_frame_hdr_space_.start + debug_frame->eh_frame.eh_frame_hdr_data.size();
- eh_frame_hdr_space_.data = debug_frame->eh_frame.eh_frame_hdr_data.data();
-
- eh_frame_space_.start = (ip - ip_vaddr) + debug_frame->eh_frame.eh_frame_vaddr;
- eh_frame_space_.end = eh_frame_space_.start + debug_frame->eh_frame.eh_frame_data.size();
- eh_frame_space_.data = debug_frame->eh_frame.eh_frame_data.data();
-
- unw_dyn_info di;
- memset(&di, '\0', sizeof(di));
- di.start_ip = map.start;
- di.end_ip = map.end;
- di.format = UNW_INFO_FORMAT_REMOTE_TABLE;
- di.u.rti.name_ptr = 0;
- di.u.rti.segbase = eh_frame_hdr_space_.start;
- di.u.rti.table_data =
- eh_frame_hdr_space_.start + debug_frame->eh_frame.fde_table_offset_in_eh_frame_hdr;
- di.u.rti.table_len = (eh_frame_hdr_space_.end - di.u.rti.table_data) / sizeof(unw_word_t);
- int ret = dwarf_search_unwind_table(addr_space, ip, &di, proc_info, need_unwind_info, this);
- return ret == 0;
- }
eh_frame_hdr_space_.Clear();
eh_frame_space_.Clear();
- unw_dyn_info_t di;
- unw_word_t segbase = map.start - map.offset;
- int found = dwarf_find_debug_frame(0, &di, ip, segbase, filename.c_str(), map.start, map.end);
- if (found == 1) {
- int ret = dwarf_search_unwind_table(addr_space, ip, &di, proc_info, need_unwind_info, this);
- return ret == 0;
+ arm_exidx_space_.Clear();
+ arm_extab_space_.Clear();
+
+ // vaddr in the elf file.
+ uint64_t ip_vaddr = ip - map.start + debug_frame->min_vaddr;
+ if (debug_frame->has_arm_exidx) {
+ auto& func_vaddrs = debug_frame->arm_exidx.func_vaddr_array;
+ if (ip_vaddr >= func_vaddrs[0] && ip_vaddr < debug_frame->text_end_vaddr) {
+ // Use binary search to find the correct function.
+ auto it = std::upper_bound(func_vaddrs.begin(), func_vaddrs.end(),
+ static_cast<uint32_t>(ip_vaddr));
+ if (it != func_vaddrs.begin()) {
+ --it;
+ // Found the exidx entry.
+ size_t index = it - func_vaddrs.begin();
+
+ proc_info->format = UNW_INFO_FORMAT_ARM_EXIDX;
+ proc_info->unwind_info = reinterpret_cast<void*>(
+ static_cast<uintptr_t>(index * sizeof(ArmIdxEntry) +
+ debug_frame->arm_exidx.exidx_vaddr +
+ debug_frame->min_vaddr));
+
+ // Prepare arm_exidx space and arm_extab space.
+ arm_exidx_space_.start = debug_frame->min_vaddr + debug_frame->arm_exidx.exidx_vaddr;
+ arm_exidx_space_.end = arm_exidx_space_.start +
+ debug_frame->arm_exidx.exidx_data.size() * sizeof(ArmIdxEntry);
+ arm_exidx_space_.data = reinterpret_cast<const uint8_t*>(
+ debug_frame->arm_exidx.exidx_data.data());
+
+ arm_extab_space_.start = debug_frame->min_vaddr + debug_frame->arm_exidx.extab_vaddr;
+ arm_extab_space_.end = arm_extab_space_.start +
+ debug_frame->arm_exidx.extab_data.size();
+ arm_extab_space_.data = debug_frame->arm_exidx.extab_data.data();
+ return true;
+ }
+ }
+ }
+
+ if (debug_frame->has_eh_frame) {
+ if (ip_vaddr >= debug_frame->eh_frame.min_func_vaddr &&
+ ip_vaddr < debug_frame->text_end_vaddr) {
+ // Prepare eh_frame_hdr space and eh_frame space.
+ eh_frame_hdr_space_.start = ip - ip_vaddr + debug_frame->eh_frame.hdr_vaddr;
+ eh_frame_hdr_space_.end =
+ eh_frame_hdr_space_.start + debug_frame->eh_frame.hdr_data.size();
+ eh_frame_hdr_space_.data = debug_frame->eh_frame.hdr_data.data();
+
+ eh_frame_space_.start = ip - ip_vaddr + debug_frame->eh_frame.vaddr;
+ eh_frame_space_.end = eh_frame_space_.start + debug_frame->eh_frame.data.size();
+ eh_frame_space_.data = debug_frame->eh_frame.data.data();
+
+ unw_dyn_info di;
+ memset(&di, '\0', sizeof(di));
+ di.start_ip = map.start;
+ di.end_ip = map.end;
+ di.format = UNW_INFO_FORMAT_REMOTE_TABLE;
+ di.u.rti.name_ptr = 0;
+ di.u.rti.segbase = eh_frame_hdr_space_.start;
+ di.u.rti.table_data =
+ eh_frame_hdr_space_.start + debug_frame->eh_frame.fde_table_offset;
+ di.u.rti.table_len = (eh_frame_hdr_space_.end - di.u.rti.table_data) / sizeof(unw_word_t);
+ // TODO: Do it ourselves is more efficient than calling this function.
+ int ret = dwarf_search_unwind_table(addr_space, ip, &di, proc_info, need_unwind_info, this);
+ if (ret == 0) {
+ return true;
+ }
+ }
+ }
+
+ if (debug_frame->has_debug_frame || debug_frame->has_gnu_debugdata) {
+ unw_dyn_info_t di;
+ unw_word_t segbase = map.start - map.offset;
+ // TODO: http://b/32916571
+ // TODO: Do it ourselves is more efficient than calling libunwind functions.
+ int found = dwarf_find_debug_frame(0, &di, ip, segbase, filename.c_str(), map.start, map.end);
+ if (found == 1) {
+ int ret = dwarf_search_unwind_table(addr_space, ip, &di, proc_info, need_unwind_info, this);
+ if (ret == 0) {
+ return true;
+ }
+ }
}
return false;
}
@@ -462,33 +544,18 @@
return "";
}
-std::unordered_map<std::string, std::unique_ptr<DebugFrameInfo>> BacktraceOffline::debug_frames_;
-std::unordered_set<std::string> BacktraceOffline::debug_frame_missing_files_;
-
static DebugFrameInfo* ReadDebugFrameFromFile(const std::string& filename);
DebugFrameInfo* BacktraceOffline::GetDebugFrameInFile(const std::string& filename) {
if (cache_file_) {
- auto it = debug_frames_.find(filename);
- if (it != debug_frames_.end()) {
+ auto it = g_debug_frames.find(filename);
+ if (it != g_debug_frames.end()) {
return it->second.get();
}
- if (debug_frame_missing_files_.find(filename) != debug_frame_missing_files_.end()) {
- return nullptr;
- }
}
DebugFrameInfo* debug_frame = ReadDebugFrameFromFile(filename);
if (cache_file_) {
- if (debug_frame != nullptr) {
- debug_frames_.emplace(filename, std::unique_ptr<DebugFrameInfo>(debug_frame));
- } else {
- debug_frame_missing_files_.insert(filename);
- }
- } else {
- if (last_debug_frame_ != nullptr) {
- delete last_debug_frame_;
- }
- last_debug_frame_ = debug_frame;
+ g_debug_frames.emplace(filename, std::unique_ptr<DebugFrameInfo>(debug_frame));
}
return debug_frame;
}
@@ -556,72 +623,106 @@
return true;
}
-using ProgramHeader = DebugFrameInfo::EhFrame::ProgramHeader;
-
template <class ELFT>
DebugFrameInfo* ReadDebugFrameFromELFFile(const llvm::object::ELFFile<ELFT>* elf) {
+ DebugFrameInfo* result = new DebugFrameInfo;
+ result->text_end_vaddr = std::numeric_limits<uint64_t>::max();
+
bool has_eh_frame_hdr = false;
- uint64_t eh_frame_hdr_vaddr = 0;
- std::vector<uint8_t> eh_frame_hdr_data;
bool has_eh_frame = false;
- uint64_t eh_frame_vaddr = 0;
- std::vector<uint8_t> eh_frame_data;
for (auto it = elf->section_begin(); it != elf->section_end(); ++it) {
llvm::ErrorOr<llvm::StringRef> name = elf->getSectionName(&*it);
if (name) {
- if (name.get() == ".debug_frame") {
- DebugFrameInfo* debug_frame = new DebugFrameInfo;
- debug_frame->is_eh_frame = false;
- return debug_frame;
- }
- if (name.get() == ".eh_frame_hdr") {
- has_eh_frame_hdr = true;
- eh_frame_hdr_vaddr = it->sh_addr;
+ std::string s = name.get();
+ if (s == ".debug_frame") {
+ result->has_debug_frame = true;
+ } else if (s == ".gnu_debugdata") {
+ result->has_gnu_debugdata = true;
+ } else if (s == ".eh_frame_hdr") {
+ result->eh_frame.hdr_vaddr = it->sh_addr;
llvm::ErrorOr<llvm::ArrayRef<uint8_t>> data = elf->getSectionContents(&*it);
if (data) {
- eh_frame_hdr_data.insert(eh_frame_hdr_data.begin(), data->data(),
- data->data() + data->size());
- } else {
- return nullptr;
+ result->eh_frame.hdr_data.insert(result->eh_frame.hdr_data.end(),
+ data->data(), data->data() + data->size());
+
+ uint64_t fde_table_offset;
+ if (GetFdeTableOffsetInEhFrameHdr(result->eh_frame.hdr_data,
+ &fde_table_offset)) {
+ result->eh_frame.fde_table_offset = fde_table_offset;
+ // Make sure we have at least one entry in fde_table.
+ if (fde_table_offset + 2 * sizeof(int32_t) <= data->size()) {
+ intptr_t eh_frame_hdr_vaddr = it->sh_addr;
+ int32_t sdata;
+ uint8_t* p = result->eh_frame.hdr_data.data() + fde_table_offset;
+ memcpy(&sdata, p, sizeof(sdata));
+ result->eh_frame.min_func_vaddr = eh_frame_hdr_vaddr + sdata;
+ has_eh_frame_hdr = true;
+ }
+ }
}
- } else if (name.get() == ".eh_frame") {
- has_eh_frame = true;
- eh_frame_vaddr = it->sh_addr;
+ } else if (s == ".eh_frame") {
+ result->eh_frame.vaddr = it->sh_addr;
llvm::ErrorOr<llvm::ArrayRef<uint8_t>> data = elf->getSectionContents(&*it);
if (data) {
- eh_frame_data.insert(eh_frame_data.begin(), data->data(), data->data() + data->size());
- } else {
- return nullptr;
+ result->eh_frame.data.insert(result->eh_frame.data.end(),
+ data->data(), data->data() + data->size());
+ has_eh_frame = true;
}
+ } else if (s == ".ARM.exidx") {
+ result->arm_exidx.exidx_vaddr = it->sh_addr;
+ llvm::ErrorOr<llvm::ArrayRef<uint8_t>> data = elf->getSectionContents(&*it);
+ if (data) {
+ size_t entry_count = data->size() / sizeof(ArmIdxEntry);
+ result->arm_exidx.exidx_data.resize(entry_count);
+ memcpy(result->arm_exidx.exidx_data.data(), data->data(),
+ entry_count * sizeof(ArmIdxEntry));
+ if (entry_count > 0u) {
+ // Change IdxEntry.func_offset into vaddr.
+ result->arm_exidx.func_vaddr_array.reserve(entry_count);
+ uint32_t vaddr = it->sh_addr;
+ for (auto& entry : result->arm_exidx.exidx_data) {
+ uint32_t func_offset = entry.func_offset + vaddr;
+ // Clear bit 31 for the prel31 offset.
+ // Arm sets bit 0 to mark it as thumb code, remove the flag.
+ result->arm_exidx.func_vaddr_array.push_back(
+ func_offset & 0x7ffffffe);
+ vaddr += 8;
+ }
+ result->has_arm_exidx = true;
+ }
+ }
+ } else if (s == ".ARM.extab") {
+ result->arm_exidx.extab_vaddr = it->sh_addr;
+ llvm::ErrorOr<llvm::ArrayRef<uint8_t>> data = elf->getSectionContents(&*it);
+ if (data) {
+ result->arm_exidx.extab_data.insert(result->arm_exidx.extab_data.end(),
+ data->data(), data->data() + data->size());
+ }
+ } else if (s == ".text") {
+ result->text_end_vaddr = it->sh_addr + it->sh_size;
}
}
}
- if (!(has_eh_frame_hdr && has_eh_frame)) {
- return nullptr;
- }
- uint64_t fde_table_offset;
- if (!GetFdeTableOffsetInEhFrameHdr(eh_frame_hdr_data, &fde_table_offset)) {
- return nullptr;
+
+ if (has_eh_frame_hdr && has_eh_frame) {
+ result->has_eh_frame = true;
}
- std::vector<ProgramHeader> program_headers;
+ result->min_vaddr = std::numeric_limits<uint64_t>::max();
for (auto it = elf->program_header_begin(); it != elf->program_header_end(); ++it) {
- ProgramHeader header;
- header.vaddr = it->p_vaddr;
- header.file_offset = it->p_offset;
- header.file_size = it->p_filesz;
- program_headers.push_back(header);
+ if ((it->p_type == llvm::ELF::PT_LOAD) && (it->p_flags & llvm::ELF::PF_X)) {
+ if (it->p_vaddr < result->min_vaddr) {
+ result->min_vaddr = it->p_vaddr;
+ }
+ }
}
- DebugFrameInfo* debug_frame = new DebugFrameInfo;
- debug_frame->is_eh_frame = true;
- debug_frame->eh_frame.eh_frame_hdr_vaddr = eh_frame_hdr_vaddr;
- debug_frame->eh_frame.eh_frame_vaddr = eh_frame_vaddr;
- debug_frame->eh_frame.fde_table_offset_in_eh_frame_hdr = fde_table_offset;
- debug_frame->eh_frame.eh_frame_hdr_data = std::move(eh_frame_hdr_data);
- debug_frame->eh_frame.eh_frame_data = std::move(eh_frame_data);
- debug_frame->eh_frame.program_headers = program_headers;
- return debug_frame;
+ if (!result->has_eh_frame && !result->has_arm_exidx && !result->has_debug_frame &&
+ !result->has_gnu_debugdata) {
+ delete result;
+ return nullptr;
+ }
+ return result;
}
static bool IsValidElfPath(const std::string& filename) {
diff --git a/libbacktrace/BacktraceOffline.h b/libbacktrace/BacktraceOffline.h
index 42f826d..c0b686e 100644
--- a/libbacktrace/BacktraceOffline.h
+++ b/libbacktrace/BacktraceOffline.h
@@ -40,22 +40,7 @@
size_t Read(uint64_t addr, uint8_t* buffer, size_t size);
};
-struct DebugFrameInfo {
- bool is_eh_frame;
- struct EhFrame {
- uint64_t eh_frame_hdr_vaddr;
- uint64_t eh_frame_vaddr;
- uint64_t fde_table_offset_in_eh_frame_hdr;
- std::vector<uint8_t> eh_frame_hdr_data;
- std::vector<uint8_t> eh_frame_data;
- struct ProgramHeader {
- uint64_t vaddr;
- uint64_t file_offset;
- uint64_t file_size;
- };
- std::vector<ProgramHeader> program_headers;
- } eh_frame;
-};
+struct DebugFrameInfo;
class BacktraceOffline : public Backtrace {
public:
@@ -63,18 +48,13 @@
bool cache_file)
: Backtrace(pid, tid, map),
cache_file_(cache_file),
- context_(nullptr),
- last_debug_frame_(nullptr) {
+ context_(nullptr) {
stack_space_.start = stack.start;
stack_space_.end = stack.end;
stack_space_.data = stack.data;
}
- virtual ~BacktraceOffline() {
- if (last_debug_frame_ != nullptr) {
- delete last_debug_frame_;
- }
- }
+ virtual ~BacktraceOffline() = default;
bool Unwind(size_t num_ignore_frames, ucontext_t* context) override;
@@ -91,15 +71,13 @@
std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) override;
DebugFrameInfo* GetDebugFrameInFile(const std::string& filename);
- static std::unordered_map<std::string, std::unique_ptr<DebugFrameInfo>> debug_frames_;
- static std::unordered_set<std::string> debug_frame_missing_files_;
-
bool cache_file_;
ucontext_t* context_;
Space eh_frame_hdr_space_;
Space eh_frame_space_;
+ Space arm_extab_space_;
+ Space arm_exidx_space_;
Space stack_space_;
- DebugFrameInfo* last_debug_frame_;
};
#endif // _LIBBACKTRACE_BACKTRACE_OFFLINE_H
diff --git a/libbacktrace/backtrace_offline_test.cpp b/libbacktrace/backtrace_offline_test.cpp
index d6dc2c9..49fcb29 100644
--- a/libbacktrace/backtrace_offline_test.cpp
+++ b/libbacktrace/backtrace_offline_test.cpp
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+#include <inttypes.h>
#include <libunwind.h>
#include <pthread.h>
#include <stdint.h>
@@ -9,6 +26,9 @@
#include <utility>
#include <vector>
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
#include <backtrace/Backtrace.h>
#include <backtrace/BacktraceMap.h>
#include <cutils/threads.h>
@@ -22,29 +42,7 @@
int test_level_three(int, int, int, int, void (*)(void*), void*);
int test_level_four(int, int, int, int, void (*)(void*), void*);
int test_recursive_call(int, void (*)(void*), void*);
-}
-
-static volatile bool g_exit_flag = false;
-
-static void GetContextAndExit(void* arg) {
- unw_context_t* unw_context = reinterpret_cast<unw_context_t*>(arg);
- unw_getcontext(unw_context);
- // Don't touch the stack anymore.
- while (!g_exit_flag) {
- }
-}
-
-struct OfflineThreadArg {
- unw_context_t unw_context;
- pid_t tid;
- std::function<int(void (*)(void*), void*)> function;
-};
-
-static void* OfflineThreadFunc(void* arg) {
- OfflineThreadArg* fn_arg = reinterpret_cast<OfflineThreadArg*>(arg);
- fn_arg->tid = gettid();
- fn_arg->function(GetContextAndExit, &fn_arg->unw_context);
- return nullptr;
+void test_get_context_and_wait(unw_context_t* unw_context, volatile int* exit_flag);
}
static ucontext_t GetUContextFromUnwContext(const unw_context_t& unw_context) {
@@ -73,11 +71,68 @@
return ucontext;
}
-static void OfflineBacktraceFunctionCall(const std::function<int(void (*)(void*), void*)>& function,
- std::vector<uintptr_t>* pc_values) {
+struct FunctionSymbol {
+ std::string name;
+ uintptr_t start;
+ uintptr_t end;
+};
+
+static std::vector<FunctionSymbol> GetFunctionSymbols() {
+ std::vector<FunctionSymbol> symbols = {
+ {"unknown_start", 0, 0},
+ {"test_level_one", reinterpret_cast<uintptr_t>(&test_level_one), 0},
+ {"test_level_two", reinterpret_cast<uintptr_t>(&test_level_two), 0},
+ {"test_level_three", reinterpret_cast<uintptr_t>(&test_level_three), 0},
+ {"test_level_four", reinterpret_cast<uintptr_t>(&test_level_four), 0},
+ {"test_recursive_call", reinterpret_cast<uintptr_t>(&test_recursive_call), 0},
+ {"test_get_context_and_wait", reinterpret_cast<uintptr_t>(&test_get_context_and_wait), 0},
+ {"unknown_end", static_cast<uintptr_t>(-1), static_cast<uintptr_t>(-1)},
+ };
+ std::sort(
+ symbols.begin(), symbols.end(),
+ [](const FunctionSymbol& s1, const FunctionSymbol& s2) { return s1.start < s2.start; });
+ for (size_t i = 0; i + 1 < symbols.size(); ++i) {
+ symbols[i].end = symbols[i + 1].start;
+ }
+ return symbols;
+}
+
+static std::string RawDataToHexString(const void* data, size_t size) {
+ const uint8_t* p = static_cast<const uint8_t*>(data);
+ std::string s;
+ for (size_t i = 0; i < size; ++i) {
+ s += android::base::StringPrintf("%02x", p[i]);
+ }
+ return s;
+}
+
+static void HexStringToRawData(const char* s, void* data, size_t size) {
+ uint8_t* p = static_cast<uint8_t*>(data);
+ for (size_t i = 0; i < size; ++i) {
+ int value;
+ sscanf(s, "%02x", &value);
+ *p++ = static_cast<uint8_t>(value);
+ s += 2;
+ }
+}
+
+struct OfflineThreadArg {
+ unw_context_t unw_context;
+ pid_t tid;
+ volatile int exit_flag;
+};
+
+static void* OfflineThreadFunc(void* arg) {
+ OfflineThreadArg* fn_arg = reinterpret_cast<OfflineThreadArg*>(arg);
+ fn_arg->tid = gettid();
+ test_get_context_and_wait(&fn_arg->unw_context, &fn_arg->exit_flag);
+ return nullptr;
+}
+
+// This test is disable because it is for generating test data.
+TEST(libbacktrace, DISABLED_generate_offline_testdata) {
// Create a thread to generate the needed stack and registers information.
- g_exit_flag = false;
- const size_t stack_size = 1024 * 1024;
+ const size_t stack_size = 16 * 1024;
void* stack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_NE(MAP_FAILED, stack);
uintptr_t stack_addr = reinterpret_cast<uintptr_t>(stack);
@@ -86,18 +141,17 @@
ASSERT_EQ(0, pthread_attr_setstack(&attr, reinterpret_cast<void*>(stack), stack_size));
pthread_t thread;
OfflineThreadArg arg;
- arg.function = function;
+ arg.exit_flag = 0;
ASSERT_EQ(0, pthread_create(&thread, &attr, OfflineThreadFunc, &arg));
// Wait for the offline thread to generate the stack and unw_context information.
sleep(1);
// Copy the stack information.
std::vector<uint8_t> stack_data(reinterpret_cast<uint8_t*>(stack),
reinterpret_cast<uint8_t*>(stack) + stack_size);
- g_exit_flag = true;
+ arg.exit_flag = 1;
ASSERT_EQ(0, pthread_join(thread, nullptr));
ASSERT_EQ(0, munmap(stack, stack_size));
- // Do offline backtrace.
std::unique_ptr<BacktraceMap> map(BacktraceMap::Create(getpid()));
ASSERT_TRUE(map != nullptr);
@@ -106,47 +160,44 @@
stack_info.end = stack_addr + stack_size;
stack_info.data = stack_data.data();
- std::unique_ptr<Backtrace> backtrace(
- Backtrace::CreateOffline(getpid(), arg.tid, map.get(), stack_info));
- ASSERT_TRUE(backtrace != nullptr);
-
- ucontext_t ucontext = GetUContextFromUnwContext(arg.unw_context);
- ASSERT_TRUE(backtrace->Unwind(0, &ucontext));
-
- // Collect pc values of the call stack frames.
- for (size_t i = 0; i < backtrace->NumFrames(); ++i) {
- pc_values->push_back(backtrace->GetFrame(i)->pc);
+ // Generate offline testdata.
+ std::string testdata;
+ // 1. Dump pid, tid
+ testdata += android::base::StringPrintf("pid: %d tid: %d\n", getpid(), arg.tid);
+ // 2. Dump maps
+ for (auto it = map->begin(); it != map->end(); ++it) {
+ testdata += android::base::StringPrintf(
+ "map: start: %" PRIxPTR " end: %" PRIxPTR " offset: %" PRIxPTR
+ " load_base: %" PRIxPTR " flags: %d name: %s\n",
+ it->start, it->end, it->offset, it->load_base, it->flags, it->name.c_str());
}
+ // 3. Dump registers
+ testdata += android::base::StringPrintf("registers: %zu ", sizeof(arg.unw_context));
+ testdata += RawDataToHexString(&arg.unw_context, sizeof(arg.unw_context));
+ testdata.push_back('\n');
+
+ // 4. Dump stack
+ testdata += android::base::StringPrintf(
+ "stack: start: %" PRIx64 " end: %" PRIx64 " size: %zu ",
+ stack_info.start, stack_info.end, stack_data.size());
+ testdata += RawDataToHexString(stack_data.data(), stack_data.size());
+ testdata.push_back('\n');
+
+ // 5. Dump function symbols
+ std::vector<FunctionSymbol> function_symbols = GetFunctionSymbols();
+ for (const auto& symbol : function_symbols) {
+ testdata += android::base::StringPrintf(
+ "function: start: %" PRIxPTR " end: %" PRIxPTR" name: %s\n",
+ symbol.start, symbol.end, symbol.name.c_str());
+ }
+
+ ASSERT_TRUE(android::base::WriteStringToFile(testdata, "offline_testdata"));
}
// Return the name of the function which matches the address. Although we don't know the
// exact end of each function, it is accurate enough for the tests.
-static std::string FunctionNameForAddress(uintptr_t addr) {
- struct FunctionSymbol {
- std::string name;
- uintptr_t start;
- uintptr_t end;
- };
-
- static std::vector<FunctionSymbol> symbols;
- if (symbols.empty()) {
- symbols = std::vector<FunctionSymbol>{
- {"unknown_start", 0, 0},
- {"test_level_one", reinterpret_cast<uintptr_t>(&test_level_one), 0},
- {"test_level_two", reinterpret_cast<uintptr_t>(&test_level_two), 0},
- {"test_level_three", reinterpret_cast<uintptr_t>(&test_level_three), 0},
- {"test_level_four", reinterpret_cast<uintptr_t>(&test_level_four), 0},
- {"test_recursive_call", reinterpret_cast<uintptr_t>(&test_recursive_call), 0},
- {"GetContextAndExit", reinterpret_cast<uintptr_t>(&GetContextAndExit), 0},
- {"unknown_end", static_cast<uintptr_t>(-1), static_cast<uintptr_t>(-1)},
- };
- std::sort(
- symbols.begin(), symbols.end(),
- [](const FunctionSymbol& s1, const FunctionSymbol& s2) { return s1.start < s2.start; });
- for (size_t i = 0; i + 1 < symbols.size(); ++i) {
- symbols[i].end = symbols[i + 1].start;
- }
- }
+static std::string FunctionNameForAddress(uintptr_t addr,
+ const std::vector<FunctionSymbol>& symbols) {
for (auto& symbol : symbols) {
if (addr >= symbol.start && addr < symbol.end) {
return symbol.name;
@@ -155,35 +206,136 @@
return "";
}
-TEST(libbacktrace, offline) {
- std::function<int(void (*)(void*), void*)> function =
- std::bind(test_level_one, 1, 2, 3, 4, std::placeholders::_1, std::placeholders::_2);
+static std::string GetArch() {
+#if defined(__arm__)
+ return "arm";
+#elif defined(__aarch64__)
+ return "aarch64";
+#elif defined(__i386__)
+ return "x86";
+#elif defined(__x86_64__)
+ return "x86_64";
+#else
+ return "";
+#endif
+}
+
+static void BacktraceOfflineTest(const std::string& testlib_name) {
+ const std::string arch = GetArch();
+ if (arch.empty()) {
+ GTEST_LOG_(INFO) << "This test does nothing on current arch.";
+ return;
+ }
+ const std::string offline_testdata_path = "testdata/" + arch + "/offline_testdata";
+ std::string testdata;
+ ASSERT_TRUE(android::base::ReadFileToString(offline_testdata_path, &testdata));
+
+ const std::string testlib_path = "testdata/" + arch + "/" + testlib_name;
+ struct stat st;
+ if (stat(testlib_path.c_str(), &st) == -1) {
+ GTEST_LOG_(INFO) << "This test is skipped as " << testlib_path << " doesn't exist.";
+ return;
+ }
+
+ // Parse offline_testdata.
+ std::vector<std::string> lines = android::base::Split(testdata, "\n");
+ int pid;
+ int tid;
+ std::vector<backtrace_map_t> maps;
+ unw_context_t unw_context;
+ backtrace_stackinfo_t stack_info;
+ std::vector<uint8_t> stack;
+ std::vector<FunctionSymbol> symbols;
+ for (const auto& line : lines) {
+ if (android::base::StartsWith(line, "pid:")) {
+ sscanf(line.c_str(), "pid: %d tid: %d", &pid, &tid);
+ } else if (android::base::StartsWith(line, "map:")) {
+ maps.resize(maps.size() + 1);
+ int pos;
+ sscanf(line.c_str(),
+ "map: start: %" SCNxPTR " end: %" SCNxPTR " offset: %" SCNxPTR
+ " load_base: %" SCNxPTR " flags: %d name: %n",
+ &maps.back().start, &maps.back().end, &maps.back().offset,
+ &maps.back().load_base, &maps.back().flags, &pos);
+ maps.back().name = android::base::Trim(line.substr(pos));
+ } else if (android::base::StartsWith(line, "registers:")) {
+ size_t size;
+ int pos;
+ sscanf(line.c_str(), "registers: %zu %n", &size, &pos);
+ ASSERT_EQ(sizeof(unw_context), size);
+ HexStringToRawData(&line[pos], &unw_context, size);
+ } else if (android::base::StartsWith(line, "stack:")) {
+ size_t size;
+ int pos;
+ sscanf(line.c_str(),
+ "stack: start: %" SCNx64 " end: %" SCNx64 " size: %zu %n",
+ &stack_info.start, &stack_info.end, &size, &pos);
+ stack.resize(size);
+ HexStringToRawData(&line[pos], &stack[0], size);
+ stack_info.data = stack.data();
+ } else if (android::base::StartsWith(line, "function:")) {
+ symbols.resize(symbols.size() + 1);
+ int pos;
+ sscanf(line.c_str(),
+ "function: start: %" SCNxPTR " end: %" SCNxPTR " name: %n",
+ &symbols.back().start, &symbols.back().end,
+ &pos);
+ symbols.back().name = line.substr(pos);
+ }
+ }
+
+ // Fix path of libbacktrace_testlib.so.
+ for (auto& map : maps) {
+ if (map.name.find("libbacktrace_test.so") != std::string::npos) {
+ map.name = testlib_path;
+ }
+ }
+
+ // Do offline backtrace.
+ std::unique_ptr<BacktraceMap> map(BacktraceMap::Create(pid, maps));
+ ASSERT_TRUE(map != nullptr);
+
+ std::unique_ptr<Backtrace> backtrace(
+ Backtrace::CreateOffline(pid, tid, map.get(), stack_info));
+ ASSERT_TRUE(backtrace != nullptr);
+
+ ucontext_t ucontext = GetUContextFromUnwContext(unw_context);
+ ASSERT_TRUE(backtrace->Unwind(0, &ucontext));
+
+
+ // Collect pc values of the call stack frames.
std::vector<uintptr_t> pc_values;
- OfflineBacktraceFunctionCall(function, &pc_values);
- ASSERT_FALSE(pc_values.empty());
- ASSERT_LE(pc_values.size(), static_cast<size_t>(MAX_BACKTRACE_FRAMES));
+ for (size_t i = 0; i < backtrace->NumFrames(); ++i) {
+ pc_values.push_back(backtrace->GetFrame(i)->pc);
+ }
size_t test_one_index = 0;
for (size_t i = 0; i < pc_values.size(); ++i) {
- if (FunctionNameForAddress(pc_values[i]) == "test_level_one") {
+ if (FunctionNameForAddress(pc_values[i], symbols) == "test_level_one") {
test_one_index = i;
break;
}
}
ASSERT_GE(test_one_index, 3u);
- ASSERT_EQ("test_level_one", FunctionNameForAddress(pc_values[test_one_index]));
- ASSERT_EQ("test_level_two", FunctionNameForAddress(pc_values[test_one_index - 1]));
- ASSERT_EQ("test_level_three", FunctionNameForAddress(pc_values[test_one_index - 2]));
- ASSERT_EQ("test_level_four", FunctionNameForAddress(pc_values[test_one_index - 3]));
+ ASSERT_EQ("test_level_one", FunctionNameForAddress(pc_values[test_one_index], symbols));
+ ASSERT_EQ("test_level_two", FunctionNameForAddress(pc_values[test_one_index - 1], symbols));
+ ASSERT_EQ("test_level_three", FunctionNameForAddress(pc_values[test_one_index - 2], symbols));
+ ASSERT_EQ("test_level_four", FunctionNameForAddress(pc_values[test_one_index - 3], symbols));
}
-TEST(libbacktrace, offline_max_trace) {
- std::function<int(void (*)(void*), void*)> function = std::bind(
- test_recursive_call, MAX_BACKTRACE_FRAMES + 10, std::placeholders::_1, std::placeholders::_2);
- std::vector<uintptr_t> pc_values;
- OfflineBacktraceFunctionCall(function, &pc_values);
- ASSERT_FALSE(pc_values.empty());
- ASSERT_EQ(static_cast<size_t>(MAX_BACKTRACE_FRAMES), pc_values.size());
- ASSERT_EQ("test_recursive_call", FunctionNameForAddress(pc_values.back()));
+TEST(libbacktrace, offline_eh_frame) {
+ BacktraceOfflineTest("libbacktrace_test_eh_frame.so");
+}
+
+TEST(libbacktrace, offline_debug_frame) {
+ BacktraceOfflineTest("libbacktrace_test_debug_frame.so");
+}
+
+TEST(libbacktrace, offline_gnu_debugdata) {
+ BacktraceOfflineTest("libbacktrace_test_gnu_debugdata.so");
+}
+
+TEST(libbacktrace, offline_arm_exidx) {
+ BacktraceOfflineTest("libbacktrace_test_arm_exidx.so");
}
diff --git a/libbacktrace/backtrace_testlib.c b/libbacktrace/backtrace_testlib.c
index d4d15db..6f6b535 100644
--- a/libbacktrace/backtrace_testlib.c
+++ b/libbacktrace/backtrace_testlib.c
@@ -14,6 +14,7 @@
* limitations under the License.
*/
+#include <libunwind.h>
#include <stdio.h>
int test_level_four(int one, int two, int three, int four,
@@ -53,3 +54,23 @@
}
return 0;
}
+
+typedef struct {
+ unw_context_t* unw_context;
+ volatile int* exit_flag;
+} GetContextArg;
+
+static void GetContextAndExit(void* data) {
+ GetContextArg* arg = (GetContextArg*)data;
+ unw_getcontext(arg->unw_context);
+ // Don't touch the stack anymore.
+ while (*arg->exit_flag == 0) {
+ }
+}
+
+void test_get_context_and_wait(unw_context_t* unw_context, volatile int* exit_flag) {
+ GetContextArg arg;
+ arg.unw_context = unw_context;
+ arg.exit_flag = exit_flag;
+ test_level_one(1, 2, 3, 4, GetContextAndExit, &arg);
+}
diff --git a/libbacktrace/testdata/aarch64/libbacktrace_test_eh_frame.so b/libbacktrace/testdata/aarch64/libbacktrace_test_eh_frame.so
new file mode 100755
index 0000000..880f337
--- /dev/null
+++ b/libbacktrace/testdata/aarch64/libbacktrace_test_eh_frame.so
Binary files differ
diff --git a/libbacktrace/testdata/aarch64/offline_testdata b/libbacktrace/testdata/aarch64/offline_testdata
new file mode 100644
index 0000000..ba44e09
--- /dev/null
+++ b/libbacktrace/testdata/aarch64/offline_testdata
@@ -0,0 +1,107 @@
+pid: 32438 tid: 32439
+map: start: 557066e000 end: 55706ee000 offset: 0 load_base: 0 flags: 5 name: /data/backtrace_test64
+map: start: 55706ef000 end: 55706f2000 offset: 80000 load_base: 0 flags: 1 name: /data/backtrace_test64
+map: start: 55706f2000 end: 55706f3000 offset: 83000 load_base: 0 flags: 3 name: /data/backtrace_test64
+map: start: 7014200000 end: 7014600000 offset: 0 load_base: 0 flags: 3 name: [anon:libc_malloc]
+map: start: 701464c000 end: 701465c000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libcutils.so
+map: start: 701465c000 end: 701465d000 offset: 0 load_base: 0 flags: 0 name:
+map: start: 701465d000 end: 701465e000 offset: 10000 load_base: 0 flags: 1 name: /system/lib64/libcutils.so
+map: start: 701465e000 end: 701465f000 offset: 11000 load_base: 0 flags: 3 name: /system/lib64/libcutils.so
+map: start: 7014691000 end: 70146b5000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/liblzma.so
+map: start: 70146b5000 end: 70146b6000 offset: 23000 load_base: 0 flags: 1 name: /system/lib64/liblzma.so
+map: start: 70146b6000 end: 70146b7000 offset: 24000 load_base: 0 flags: 3 name: /system/lib64/liblzma.so
+map: start: 70146b7000 end: 70146bc000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 70146c9000 end: 70158b5000 offset: 0 load_base: af000 flags: 5 name: /system/lib64/libLLVM.so
+map: start: 70158b5000 end: 701596b000 offset: 11eb000 load_base: 0 flags: 1 name: /system/lib64/libLLVM.so
+map: start: 701596b000 end: 701596c000 offset: 12a1000 load_base: 0 flags: 3 name: /system/lib64/libLLVM.so
+map: start: 701596c000 end: 701599f000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 70159c2000 end: 70159f9000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libm.so
+map: start: 70159f9000 end: 70159fa000 offset: 36000 load_base: 0 flags: 1 name: /system/lib64/libm.so
+map: start: 70159fa000 end: 70159fb000 offset: 37000 load_base: 0 flags: 3 name: /system/lib64/libm.so
+map: start: 7015a1e000 end: 7015a2e000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libbacktrace.so
+map: start: 7015a2e000 end: 7015a2f000 offset: f000 load_base: 0 flags: 1 name: /system/lib64/libbacktrace.so
+map: start: 7015a2f000 end: 7015a30000 offset: 10000 load_base: 0 flags: 3 name: /system/lib64/libbacktrace.so
+map: start: 7015a5e000 end: 7015a7d000 offset: 0 load_base: 1000 flags: 5 name: /system/lib64/libutils.so
+map: start: 7015a7d000 end: 7015a7e000 offset: 0 load_base: 0 flags: 0 name:
+map: start: 7015a7e000 end: 7015a7f000 offset: 1f000 load_base: 0 flags: 1 name: /system/lib64/libutils.so
+map: start: 7015a7f000 end: 7015a80000 offset: 20000 load_base: 0 flags: 3 name: /system/lib64/libutils.so
+map: start: 7015a99000 end: 7015b6d000 offset: 0 load_base: 9000 flags: 5 name: /system/lib64/libc++.so
+map: start: 7015b6d000 end: 7015b6e000 offset: 0 load_base: 0 flags: 0 name:
+map: start: 7015b6e000 end: 7015b76000 offset: d4000 load_base: 0 flags: 1 name: /system/lib64/libc++.so
+map: start: 7015b76000 end: 7015b77000 offset: dc000 load_base: 0 flags: 3 name: /system/lib64/libc++.so
+map: start: 7015b77000 end: 7015b7a000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 7015b81000 end: 7015b92000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/liblog.so
+map: start: 7015b92000 end: 7015b93000 offset: 10000 load_base: 0 flags: 1 name: /system/lib64/liblog.so
+map: start: 7015b93000 end: 7015b94000 offset: 11000 load_base: 0 flags: 3 name: /system/lib64/liblog.so
+map: start: 7015be3000 end: 7015ca3000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libc.so
+map: start: 7015ca3000 end: 7015ca9000 offset: bf000 load_base: 0 flags: 1 name: /system/lib64/libc.so
+map: start: 7015ca9000 end: 7015cab000 offset: c5000 load_base: 0 flags: 3 name: /system/lib64/libc.so
+map: start: 7015cab000 end: 7015cac000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 7015cac000 end: 7015cad000 offset: 0 load_base: 0 flags: 1 name: [anon:.bss]
+map: start: 7015cad000 end: 7015cb4000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 7015cf5000 end: 7015cf6000 offset: 0 load_base: 0 flags: 5 name: /data/libbacktrace_test.so
+map: start: 7015cf6000 end: 7015cf7000 offset: 0 load_base: 0 flags: 1 name: /data/libbacktrace_test.so
+map: start: 7015cf7000 end: 7015cf8000 offset: 1000 load_base: 0 flags: 3 name: /data/libbacktrace_test.so
+map: start: 7015d1f000 end: 7015d39000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libunwind.so
+map: start: 7015d39000 end: 7015d3a000 offset: 19000 load_base: 0 flags: 1 name: /system/lib64/libunwind.so
+map: start: 7015d3a000 end: 7015d3b000 offset: 1a000 load_base: 0 flags: 3 name: /system/lib64/libunwind.so
+map: start: 7015d3b000 end: 7015da4000 offset: 0 load_base: 0 flags: 3 name: [anon:.bss]
+map: start: 7015de8000 end: 7015df7000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libbase.so
+map: start: 7015df7000 end: 7015df8000 offset: 0 load_base: 0 flags: 0 name:
+map: start: 7015df8000 end: 7015df9000 offset: f000 load_base: 0 flags: 1 name: /system/lib64/libbase.so
+map: start: 7015df9000 end: 7015dfa000 offset: 10000 load_base: 0 flags: 3 name: /system/lib64/libbase.so
+map: start: 7015e35000 end: 7015e36000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc]
+map: start: 7015e4f000 end: 7015e50000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_small_objects]
+map: start: 7015f11000 end: 7015f13000 offset: 0 load_base: 0 flags: 5 name: /system/lib64/libnetd_client.so
+map: start: 7015f13000 end: 7015f14000 offset: 1000 load_base: 0 flags: 1 name: /system/lib64/libnetd_client.so
+map: start: 7015f14000 end: 7015f15000 offset: 2000 load_base: 0 flags: 3 name: /system/lib64/libnetd_client.so
+map: start: 7015f6c000 end: 7015f79000 offset: 0 load_base: 0 flags: 3 name:
+map: start: 7015f79000 end: 7015f99000 offset: 0 load_base: 0 flags: 32769 name: /dev/__properties__/u:object_r:default_prop:s0
+map: start: 7015f99000 end: 7015f9a000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_vector]
+map: start: 7015f9a000 end: 7015f9b000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_small_objects]
+map: start: 7015fa6000 end: 7015fa7000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_vector]
+map: start: 7015fa8000 end: 7015fa9000 offset: 0 load_base: 0 flags: 1 name: [anon:linker_alloc]
+map: start: 7015faf000 end: 7015fcf000 offset: 0 load_base: 0 flags: 32769 name: /dev/__properties__/properties_serial
+map: start: 7015fcf000 end: 7015fd0000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_vector]
+map: start: 7015fd0000 end: 7015fd1000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_small_objects]
+map: start: 7015fd1000 end: 7015fd2000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_vector]
+map: start: 7015fd4000 end: 7015fd7000 offset: 0 load_base: 0 flags: 3 name:
+map: start: 7015fd7000 end: 7015fdb000 offset: 0 load_base: 0 flags: 1 name: [anon:atexit handlers]
+map: start: 7015fdb000 end: 7015fdc000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc]
+map: start: 7015fdc000 end: 7015fdd000 offset: 0 load_base: 0 flags: 3 name:
+map: start: 7015fdd000 end: 7015fde000 offset: 0 load_base: 0 flags: 1 name: [anon:linker_alloc]
+map: start: 7015fde000 end: 7015ffe000 offset: 0 load_base: 0 flags: 32769 name: /dev/__properties__/u:object_r:debug_prop:s0
+map: start: 7015ffe000 end: 701601e000 offset: 0 load_base: 0 flags: 32769 name: /dev/__properties__/properties_serial
+map: start: 701601e000 end: 701601f000 offset: 0 load_base: 0 flags: 3 name: [anon:linker_alloc_vector]
+map: start: 701601f000 end: 7016020000 offset: 0 load_base: 0 flags: 0 name:
+map: start: 7016020000 end: 7016021000 offset: 0 load_base: 0 flags: 3 name:
+map: start: 7016021000 end: 7016022000 offset: 0 load_base: 0 flags: 0 name:
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Binary files differ
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diff --git a/libbacktrace/testdata/x86_64/libbacktrace_test_eh_frame.so b/libbacktrace/testdata/x86_64/libbacktrace_test_eh_frame.so
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diff --git a/libbacktrace/testdata/x86_64/offline_testdata b/libbacktrace/testdata/x86_64/offline_testdata
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+function: start: 0 end: 7fd5abcf7930 name: unknown_start
+function: start: 7fd5abcf7930 end: 7fd5abcf7990 name: test_level_four
+function: start: 7fd5abcf7990 end: 7fd5abcf79f0 name: test_level_three
+function: start: 7fd5abcf79f0 end: 7fd5abcf7a50 name: test_level_two
+function: start: 7fd5abcf7a50 end: 7fd5abcf7ab0 name: test_level_one
+function: start: 7fd5abcf7ab0 end: 7fd5abcf7b30 name: test_recursive_call
+function: start: 7fd5abcf7b30 end: ffffffffffffffff name: test_get_context_and_wait
+function: start: ffffffffffffffff end: ffffffffffffffff name: unknown_end
