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Commit 4c3a9dfd authored by Sijie Chen's avatar Sijie Chen
Browse files

[Berberis][CrashReporting] Dump guest thread info to tombstone file 

As title.

Bug: b/321799516
Test: riscv64, checked tombstone file has wanted block.
https://paste.googleplex.com/5958508322750464
Added arm64 support and tested arm64 unwinding in internal repo.
https://paste.googleplex.com/6545612887818240

Change-Id: I4e8a3414d0198de88a577ef4d5672a9ad0286fc5
parent 3ff250f6

debuggerd/crash_dump.cpp

+37 −2
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <map>

#include <memory>

#include <set>

#include <string>

#include <vector>



#include <android-base/errno_restorer.h>
@@ -81,6 +82,10 @@ using android::base::ErrnoRestorer; 
using android::base::StringPrintf;

using android::base::unique_fd;



// This stores guest architecture. When the architecture is supported, tombstone file will output

// guest state information.

static Architecture g_guest_arch;



static bool pid_contains_tid(int pid_proc_fd, pid_t tid) {

  struct stat st;

  std::string task_path = StringPrintf("task/%d", tid);
@@ -490,6 +495,8 @@ static void ReadGuestRegisters(std::unique_ptr<unwindstack::Regs>* regs, pid_t t 
        arm_user_regs.regs[i] = guest_regs.regs_arm.r[i];

      }

      regs->reset(unwindstack::RegsArm::Read(&arm_user_regs));



      g_guest_arch = Architecture::ARM32;

      break;

    }

#if defined(__LP64__)
@@ -501,6 +508,8 @@ static void ReadGuestRegisters(std::unique_ptr<unwindstack::Regs>* regs, pid_t t 
      arm64_user_regs.sp = guest_regs.regs_arm64.sp;

      arm64_user_regs.pc = guest_regs.regs_arm64.ip;

      regs->reset(unwindstack::RegsArm64::Read(&arm64_user_regs));



      g_guest_arch = Architecture::ARM64;

      break;

    }

    case NATIVE_BRIDGE_ARCH_RISCV64: {
@@ -511,6 +520,8 @@ static void ReadGuestRegisters(std::unique_ptr<unwindstack::Regs>* regs, pid_t t 
        riscv64_user_regs.regs[i] = guest_regs.regs_riscv64.x[i];

      }

      regs->reset(unwindstack::RegsRiscv64::Read(&riscv64_user_regs, tid));



      g_guest_arch = Architecture::RISCV64;

      break;

    }

#endif
@@ -775,8 +786,32 @@ int main(int argc, char** argv) { 


    {

      ATRACE_NAME("engrave_tombstone");

      unwindstack::ArchEnum regs_arch = unwindstack::ARCH_UNKNOWN;

      switch (g_guest_arch) {

        case Architecture::ARM32: {

          regs_arch = unwindstack::ARCH_ARM;

          break;

        }

        case Architecture::ARM64: {

          regs_arch = unwindstack::ARCH_ARM64;

          break;

        }

        case Architecture::RISCV64: {

          regs_arch = unwindstack::ARCH_RISCV64;

          break;

        }

        default: {

        }

      }

      if (regs_arch == unwindstack::ARCH_UNKNOWN) {

        engrave_tombstone(std::move(g_output_fd), std::move(g_proto_fd), &unwinder, thread_info,

                          g_target_thread, process_info, &open_files, &amfd_data);

      } else {

        unwindstack::AndroidRemoteUnwinder guest_unwinder(vm_pid, regs_arch);

        engrave_tombstone(std::move(g_output_fd), std::move(g_proto_fd), &unwinder, thread_info,

                          g_target_thread, process_info, &open_files, &amfd_data, &g_guest_arch,

                          &guest_unwinder);

      }

    }

  }

debuggerd/libdebuggerd/include/libdebuggerd/tombstone.h

+6 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <android-base/unique_fd.h>



#include "open_files_list.h"

#include "tombstone.pb.h"

#include "types.h"



// Forward declarations
@@ -54,14 +55,17 @@ void engrave_tombstone(android::base::unique_fd output_fd, android::base::unique 
                       unwindstack::AndroidUnwinder* unwinder,

                       const std::map<pid_t, ThreadInfo>& thread_info, pid_t target_thread,

                       const ProcessInfo& process_info, OpenFilesList* open_files,

                       std::string* amfd_data);

                       std::string* amfd_data, Architecture* guest_arch = nullptr,

                       unwindstack::AndroidUnwinder* guest_unwinder = nullptr);



void engrave_tombstone_ucontext(int tombstone_fd, int proto_fd, uint64_t abort_msg_address,

                                siginfo_t* siginfo, ucontext_t* ucontext);



void engrave_tombstone_proto(Tombstone* tombstone, unwindstack::AndroidUnwinder* unwinder,

                             const std::map<pid_t, ThreadInfo>& threads, pid_t target_thread,

                             const ProcessInfo& process_info, const OpenFilesList* open_files);

                             const ProcessInfo& process_info, const OpenFilesList* open_files,

                             Architecture* guest_arch,

                             unwindstack::AndroidUnwinder* guest_unwinder);



bool tombstone_proto_to_text(

    const Tombstone& tombstone,

debuggerd/libdebuggerd/tombstone.cpp

+4 −2
Original line number Diff line number Diff line
@@ -125,10 +125,12 @@ void engrave_tombstone(unique_fd output_fd, unique_fd proto_fd, 
                       unwindstack::AndroidUnwinder* unwinder,

                       const std::map<pid_t, ThreadInfo>& threads, pid_t target_thread,

                       const ProcessInfo& process_info, OpenFilesList* open_files,

                       std::string* amfd_data) {

                       std::string* amfd_data, Architecture* guest_arch,

                       unwindstack::AndroidUnwinder* guest_unwinder) {

  // Don't copy log messages to tombstone unless this is a development device.

  Tombstone tombstone;

  engrave_tombstone_proto(&tombstone, unwinder, threads, target_thread, process_info, open_files);

  engrave_tombstone_proto(&tombstone, unwinder, threads, target_thread, process_info, open_files,

                          guest_arch, guest_unwinder);



  if (proto_fd != -1) {

    if (!tombstone.SerializeToFileDescriptor(proto_fd.get())) {

debuggerd/libdebuggerd/tombstone_proto.cpp

+31 −3
Original line number Diff line number Diff line
@@ -482,7 +482,8 @@ static void dump_thread_backtrace(std::vector<unwindstack::FrameData>& frames, T 
}



static void dump_thread(Tombstone* tombstone, unwindstack::AndroidUnwinder* unwinder,

                        const ThreadInfo& thread_info, bool memory_dump = false) {

                        const ThreadInfo& thread_info, bool memory_dump = false,

                        unwindstack::AndroidUnwinder* guest_unwinder = nullptr) {

  Thread thread;



  thread.set_id(thread_info.tid);
@@ -509,6 +510,26 @@ static void dump_thread(Tombstone* tombstone, unwindstack::AndroidUnwinder* unwi 


  auto& threads = *tombstone->mutable_threads();

  threads[thread_info.tid] = thread;



  if (guest_unwinder) {

    if (!thread_info.guest_registers) {

      async_safe_format_log(ANDROID_LOG_INFO, LOG_TAG,

                            "No guest state registers information for tid %d", thread_info.tid);

      return;

    }

    Thread guest_thread;

    unwindstack::AndroidUnwinderData guest_data;

    guest_data.saved_initial_regs = std::make_optional<std::unique_ptr<unwindstack::Regs>>();

    if (guest_unwinder->Unwind(thread_info.guest_registers.get(), guest_data)) {

      dump_thread_backtrace(guest_data.frames, guest_thread);

    } else {

      async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG,

                            "Unwind guest state registers failed for tid %d: Error %s",

                            thread_info.tid, guest_data.GetErrorString().c_str());

    }

    dump_registers(guest_unwinder, *guest_data.saved_initial_regs, guest_thread, memory_dump);

    *tombstone->mutable_guest_thread() = guest_thread;

  }

}



static void dump_mappings(Tombstone* tombstone, unwindstack::Maps* maps,
@@ -686,10 +707,17 @@ static void dump_tags_around_fault_addr(Signal* signal, const Tombstone& tombsto 


void engrave_tombstone_proto(Tombstone* tombstone, unwindstack::AndroidUnwinder* unwinder,

                             const std::map<pid_t, ThreadInfo>& threads, pid_t target_tid,

                             const ProcessInfo& process_info, const OpenFilesList* open_files) {

                             const ProcessInfo& process_info, const OpenFilesList* open_files,

                             Architecture* guest_arch,

                             unwindstack::AndroidUnwinder* guest_unwinder) {

  Tombstone result;



  result.set_arch(get_arch());

  if (guest_arch != nullptr) {

    result.set_guest_arch(*guest_arch);

  } else {

    result.set_guest_arch(Architecture::NONE);

  }

  result.set_build_fingerprint(android::base::GetProperty("ro.build.fingerprint", "unknown"));

  result.set_revision(android::base::GetProperty("ro.revision", "unknown"));

  result.set_timestamp(get_timestamp());
@@ -750,7 +778,7 @@ void engrave_tombstone_proto(Tombstone* tombstone, unwindstack::AndroidUnwinder* 
  dump_abort_message(&result, unwinder->GetProcessMemory(), process_info);

  dump_crash_details(&result, unwinder->GetProcessMemory(), process_info);

  // Dump the target thread, but save the memory around the registers.

  dump_thread(&result, unwinder, target_thread, /* memory_dump */ true);

  dump_thread(&result, unwinder, target_thread, /* memory_dump */ true, guest_unwinder);



  for (const auto& [tid, thread_info] : threads) {

    if (tid != target_tid) {

debuggerd/libdebuggerd/tombstone_proto_to_text.cpp

+34 −3
Original line number Diff line number Diff line
@@ -79,8 +79,8 @@ static std::string describe_pac_enabled_keys(long value) { 
  return describe_end(value, desc);

}



static const char* abi_string(const Tombstone& tombstone) {

  switch (tombstone.arch()) {

static const char* abi_string(const Architecture& arch) {

  switch (arch) {

    case Architecture::ARM32:

      return "arm";

    case Architecture::ARM64:
@@ -578,11 +578,37 @@ void print_logs(CallbackType callback, const Tombstone& tombstone, int tail) { 
  }

}



static void print_guest_thread(CallbackType callback, const Tombstone& tombstone,

                               const Thread& guest_thread) {

  CBS("--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---");

  CBS("Guest thread information");

  print_thread_registers(callback, tombstone, guest_thread, true);



  CBS("");

  CB(true, "%d total frames", guest_thread.current_backtrace().size());

  CB(true, "backtrace:");

  print_backtrace(callback, tombstone, guest_thread.current_backtrace(), true);



  print_thread_memory_dump(callback, tombstone, guest_thread);



  CBS("");



  // No memory maps to print.

  if (!tombstone.memory_mappings().empty()) {

    print_memory_maps(callback, tombstone);

  } else {

    CBS("No memory maps found");

  }

}



bool tombstone_proto_to_text(const Tombstone& tombstone, CallbackType callback) {

  CBL("*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***");

  CBL("Build fingerprint: '%s'", tombstone.build_fingerprint().c_str());

  CBL("Revision: '%s'", tombstone.revision().c_str());

  CBL("ABI: '%s'", abi_string(tombstone));

  CBL("ABI: '%s'", abi_string(tombstone.arch()));

  if (tombstone.guest_arch() != Architecture::NONE) {

    CBL("Guest architecture: '%s'", abi_string(tombstone.guest_arch()));

  }

  CBL("Timestamp: %s", tombstone.timestamp().c_str());

  CBL("Process uptime: %ds", tombstone.process_uptime());
@@ -635,5 +661,10 @@ bool tombstone_proto_to_text(const Tombstone& tombstone, CallbackType callback) 


  print_logs(callback, tombstone, 0);



  // Process guest thread

  if (tombstone.has_guest_thread()) {

    print_guest_thread(callback, tombstone, tombstone.guest_thread());

  }



  return true;

}