Add ARM family minidump support

Bug: crashpad:30
Change-Id: I6784d42ba6c525c4e0b16dfdbbb4949c83e32fea
Reviewed-on: https://chromium-review.googlesource.com/888541
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>

minidump/minidump_context.h

@@ -336,6 +336,102 @@ struct alignas(16) MinidumpContextAMD64 {
   //! \}
 };
 
+//! \brief 32-bit ARM-specifc flags for MinidumpContextARM::context_flags.
+enum MinidumpContextARMFlags : uint32_t {
+  //! \brief Identifies the context structure as 32-bit ARM.
+  kMinidumpContextARM = 0x40000000,
+
+  //! \brief Indicates the validity of integer regsiters.
+  //!
+  //! Regsiters `r0`-`r15` and `cpsr` are valid.
+  kMinidumpContextARMInteger = kMinidumpContextARM | 0x00000002,
+
+  //! \brief Inidicates the validity of VFP regsiters.
+  //!
+  //! Registers `d0`-`d31` and `fpscr` are valid.
+  kMinidumpContextARMVFP = kMinidumpContextARM | 0x00000004,
+
+  //! \brief Indicates the validity of all registers.
+  kMinidumpContextARMAll = kMinidumpContextARMInteger | kMinidumpContextARMVFP,
+};
+
+//! \brief A 32-bit ARM CPU context (register state) carried in a minidump file.
+struct MinidumpContextARM {
+  //! \brief A bitfield composed of values of #MinidumpContextFlags and
+  //!     #MinidumpContextARMFlags.
+  //!
+  //! This field identifies the context structure as a 32-bit ARM CPU context,
+  //! and indicates which other fields in the structure are valid.
+  uint32_t context_flags;
+
+  //! \brief General-purpose registers `r0`-`r15`.
+  uint32_t regs[11];
+  uint32_t fp;  // r11
+  uint32_t ip;  // r12
+  uint32_t sp;  // r13
+  uint32_t lr;  // r14
+  uint32_t pc;  // r15
+
+  //! \brief Current program status register.
+  uint32_t cpsr;
+
+  //! \brief Floating-point status and control register.
+  uint32_t fpscr;
+
+  //! \brief VFP registers `d0`-`d31`.
+  uint64_t vfp[32];
+
+  //! \brief This space is unused. It is included for compatibility with
+  //!     breakpad (which also doesn't use it).
+  uint32_t extra[8];
+};
+
+//! \brief 64-bit ARM-specifc flags for MinidumpContextARM64::context_flags.
+enum MinidumpContextARM64Flags : uint32_t {
+  //! \brief Identifies the context structure as 64-bit ARM.
+  kMinidumpContextARM64 = 0x80000000,
+
+  //! \brief Indicates the validty of integer registers.
+  //!
+  //! Registers `x0`-`x31`, `pc`, and `cpsr`.
+  kMinidumpContextARM64Integer = kMinidumpContextARM64 | 0x00000002,
+
+  //! \brief Indicates the validity of fpsimd registers.
+  //!
+  //! Registers `v0`-`v31`, `fpsr`, and `fpcr` are valid.
+  kMinidumpContextARM64Fpsimd = kMinidumpContextARM64 | 0x00000004,
+
+  //! \brief Indicates the validity of all registers.
+  kMinidumpContextARM64All =
+      kMinidumpContextARM64Integer | kMinidumpContextARM64Fpsimd,
+};
+
+//! \brief A 64-bit ARM CPU context (register state) carried in a minidump file.
+struct MinidumpContextARM64 {
+  uint64_t context_flags;
+
+  //! \brief General-purpose registers `x0`-`x30`.
+  uint64_t regs[31];
+
+  //! \brief Stack pointer or `x31`.
+  uint64_t sp;
+
+  //! \brief Program counter.
+  uint64_t pc;
+
+  //! \brief Current program status register.
+  uint32_t cpsr;
+
+  //! \brief Floating-point status register.
+  uint32_t fpsr;
+
+  //! \brief Floating-point control register.
+  uint32_t fpcr;
+
+  //! \brief NEON registers `v0`-`v31`.
+  uint128_struct fpsimd[32];
+};
+
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_CONTEXT_H_

minidump/minidump_context_writer.cc

@@ -73,6 +73,19 @@ MinidumpContextWriter::CreateFromSnapshot(const CPUContext* context_snapshot) {
       break;
     }
 
+    case kCPUArchitectureARM: {
+      context = std::make_unique<MinidumpContextARMWriter>();
+      reinterpret_cast<MinidumpContextARMWriter*>(context.get())
+          ->InitializeFromSnapshot(context_snapshot->arm);
+      break;
+    }
+
+    case kCPUArchitectureARM64: {
+      context = std::make_unique<MinidumpContextARM64Writer>();
+      reinterpret_cast<MinidumpContextARM64Writer*>(context.get())
+          ->InitializeFromSnapshot(context_snapshot->arm64);
+    }
+
     default: {
       LOG(ERROR) << "unknown context architecture "
                  << context_snapshot->architecture;
@@ -239,4 +252,90 @@ size_t MinidumpContextAMD64Writer::ContextSize() const {
   return sizeof(context_);
 }
 
+MinidumpContextARMWriter::MinidumpContextARMWriter()
+    : MinidumpContextWriter(), context_() {
+  context_.context_flags = kMinidumpContextARM;
+}
+
+MinidumpContextARMWriter::~MinidumpContextARMWriter() = default;
+
+void MinidumpContextARMWriter::InitializeFromSnapshot(
+    const CPUContextARM* context_snapshot) {
+  DCHECK_EQ(state(), kStateMutable);
+  DCHECK_EQ(context_.context_flags, kMinidumpContextARM);
+
+  context_.context_flags = kMinidumpContextARMAll;
+
+  static_assert(sizeof(context_.regs) == sizeof(context_snapshot->regs),
+                "GPRS size mismatch");
+  memcpy(context_.regs, context_snapshot->regs, sizeof(context_.regs));
+  context_.fp = context_snapshot->fp;
+  context_.ip = context_snapshot->ip;
+  context_.sp = context_snapshot->sp;
+  context_.lr = context_snapshot->lr;
+  context_.pc = context_snapshot->pc;
+  context_.cpsr = context_snapshot->cpsr;
+
+  context_.fpscr = context_snapshot->vfp_regs.fpscr;
+  static_assert(sizeof(context_.vfp) == sizeof(context_snapshot->vfp_regs.vfp),
+                "VFP size mismatch");
+  memcpy(context_.vfp, context_snapshot->vfp_regs.vfp, sizeof(context_.vfp));
+
+  memset(context_.extra, 0, sizeof(context_.extra));
+}
+
+bool MinidumpContextARMWriter::WriteObject(FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+  return file_writer->Write(&context_, sizeof(context_));
+}
+
+size_t MinidumpContextARMWriter::ContextSize() const {
+  DCHECK_GE(state(), kStateFrozen);
+  return sizeof(context_);
+}
+
+MinidumpContextARM64Writer::MinidumpContextARM64Writer()
+    : MinidumpContextWriter(), context_() {
+  context_.context_flags = kMinidumpContextARM64;
+}
+
+MinidumpContextARM64Writer::~MinidumpContextARM64Writer() = default;
+
+void MinidumpContextARM64Writer::InitializeFromSnapshot(
+    const CPUContextARM64* context_snapshot) {
+  DCHECK_EQ(state(), kStateMutable);
+  DCHECK_EQ(context_.context_flags, kMinidumpContextARM64);
+
+  context_.context_flags = kMinidumpContextARM64All;
+
+  static_assert(sizeof(context_.regs) == sizeof(context_snapshot->regs),
+                "GPRs size mismatch");
+  memcpy(context_.regs, context_snapshot->regs, sizeof(context_.regs));
+  context_.sp = context_snapshot->sp;
+  context_.pc = context_snapshot->pc;
+
+  if (context_snapshot->pstate >
+      std::numeric_limits<decltype(context_.cpsr)>::max()) {
+    LOG(WARNING) << "pstate truncation";
+  }
+  context_.cpsr =
+      static_cast<decltype(context_.cpsr)>(context_snapshot->pstate);
+
+  context_.fpsr = context_snapshot->fpsr;
+  context_.fpcr = context_snapshot->fpcr;
+  static_assert(sizeof(context_.fpsimd) == sizeof(context_snapshot->fpsimd),
+                "FPSIMD size mismatch");
+  memcpy(context_.fpsimd, context_snapshot->fpsimd, sizeof(context_.fpsimd));
+}
+
+bool MinidumpContextARM64Writer::WriteObject(FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+  return file_writer->Write(&context_, sizeof(context_));
+}
+
+size_t MinidumpContextARM64Writer::ContextSize() const {
+  DCHECK_GE(state(), kStateFrozen);
+  return sizeof(context_);
+}
+
 }  // namespace crashpad

minidump/minidump_context_writer.h

@@ -155,6 +155,86 @@ class MinidumpContextAMD64Writer final : public MinidumpContextWriter {
   DISALLOW_COPY_AND_ASSIGN(MinidumpContextAMD64Writer);
 };
 
+//! \brief The writer for a MinidumpContextARM structure in a minidump file.
+class MinidumpContextARMWriter final : public MinidumpContextWriter {
+ public:
+  MinidumpContextARMWriter();
+  ~MinidumpContextARMWriter() override;
+
+  //! \brief Initializes the MinidumpContextARM based on \a context_snapshot.
+  //!
+  //! \param[in] context_snapshot The context snapshot to use as source data.
+  //!
+  //! \note Valid in #kStateMutable. No mutation of context() may be done before
+  //!     calling this method, and it is not normally necessary to alter
+  //!     context() after calling this method.
+  void InitializeFromSnapshot(const CPUContextARM* context_snapshot);
+
+  //! \brief Returns a pointer to the context structure that this object will
+  //!     write.
+  //!
+  //! \attention This returns a non-`const` pointer to this object’s private
+  //!     data so that a caller can populate the context structure directly.
+  //!     This is done because providing setter interfaces to each field in the
+  //!     context structure would be unwieldy and cumbersome. Care must be taken
+  //!     to populate the context structure correctly. The context structure
+  //!     must only be modified while this object is in the #kStateMutable
+  //!     state.
+  MinidumpContextARM* context() { return &context_; }
+
+ protected:
+  // MinidumpWritable:
+  bool WriteObject(FileWriterInterface* file_writer) override;
+
+  // MinidumpContextWriter:
+  size_t ContextSize() const override;
+
+ private:
+  MinidumpContextARM context_;
+
+  DISALLOW_COPY_AND_ASSIGN(MinidumpContextARMWriter);
+};
+
+//! \brief The writer for a MinidumpContextARM64 structure in a minidump file.
+class MinidumpContextARM64Writer final : public MinidumpContextWriter {
+ public:
+  MinidumpContextARM64Writer();
+  ~MinidumpContextARM64Writer() override;
+
+  //! \brief Initializes the MinidumpContextARM64 based on \a context_snapshot.
+  //!
+  //! \param[in] context_snapshot The context snapshot to use as source data.
+  //!
+  //! \note Valid in #kStateMutable. No mutation of context() may be done before
+  //!     calling this method, and it is not normally necessary to alter
+  //!     context() after calling this method.
+  void InitializeFromSnapshot(const CPUContextARM64* context_snapshot);
+
+  //! \brief Returns a pointer to the context structure that this object will
+  //!     write.
+  //!
+  //! \attention This returns a non-`const` pointer to this object’s private
+  //!     data so that a caller can populate the context structure directly.
+  //!     This is done because providing setter interfaces to each field in the
+  //!     context structure would be unwieldy and cumbersome. Care must be taken
+  //!     to populate the context structure correctly. The context structure
+  //!     must only be modified while this object is in the #kStateMutable
+  //!     state.
+  MinidumpContextARM64* context() { return &context_; }
+
+ protected:
+  // MinidumpWritable:
+  bool WriteObject(FileWriterInterface* file_writer) override;
+
+  // MinidumpContextWriter:
+  size_t ContextSize() const override;
+
+ private:
+  MinidumpContextARM64 context_;
+
+  DISALLOW_COPY_AND_ASSIGN(MinidumpContextARM64Writer);
+};
+
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_CONTEXT_WRITER_H_

minidump/minidump_context_writer_test.cc

@@ -28,6 +28,20 @@ namespace crashpad {
 namespace test {
 namespace {
 
+template <typename Writer, typename Context>
+void EmptyContextTest(void (*expect_context)(uint32_t, const Context*, bool)) {
+  Writer context_writer;
+  StringFile string_file;
+  EXPECT_TRUE(context_writer.WriteEverything(&string_file));
+  ASSERT_EQ(string_file.string().size(), sizeof(Context));
+
+  const Context* observed =
+      MinidumpWritableAtRVA<Context>(string_file.string(), 0);
+  ASSERT_TRUE(observed);
+
+  expect_context(0, observed, false);
+}
+
 TEST(MinidumpContextWriter, MinidumpContextX86Writer) {
   StringFile string_file;
 
@@ -36,16 +50,8 @@ TEST(MinidumpContextWriter, MinidumpContextX86Writer) {
     // context.
     SCOPED_TRACE("zero");
 
-    MinidumpContextX86Writer context_writer;
-
-    EXPECT_TRUE(context_writer.WriteEverything(&string_file));
-    ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextX86));
-
-    const MinidumpContextX86* observed =
-        MinidumpWritableAtRVA<MinidumpContextX86>(string_file.string(), 0);
-    ASSERT_TRUE(observed);
-
-    ExpectMinidumpContextX86(0, observed, false);
+    EmptyContextTest<MinidumpContextX86Writer, MinidumpContextX86>(
+        ExpectMinidumpContextX86);
   }
 
   {
@@ -85,16 +91,8 @@ TEST(MinidumpContextWriter, MinidumpContextAMD64Writer) {
     // context.
     SCOPED_TRACE("zero");
 
-    MinidumpContextAMD64Writer context_writer;
-
-    EXPECT_TRUE(context_writer.WriteEverything(&string_file));
-    ASSERT_EQ(string_file.string().size(), sizeof(MinidumpContextAMD64));
-
-    const MinidumpContextAMD64* observed =
-        MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(), 0);
-    ASSERT_TRUE(observed);
-
-    ExpectMinidumpContextAMD64(0, observed, false);
+    EmptyContextTest<MinidumpContextAMD64Writer, MinidumpContextAMD64>(
+        ExpectMinidumpContextAMD64);
   }
 
   {
@@ -117,48 +115,72 @@ TEST(MinidumpContextWriter, MinidumpContextAMD64Writer) {
   }
 }
 
-TEST(MinidumpContextWriter, CreateFromSnapshot_X86) {
-  constexpr uint32_t kSeed = 32;
-
-  CPUContextX86 context_snapshot_x86;
-  CPUContext context_snapshot;
-  context_snapshot.x86 = &context_snapshot_x86;
-  InitializeCPUContextX86(&context_snapshot, kSeed);
-
+template <typename Writer, typename Context>
+void FromSnapshotTest(const CPUContext& snapshot_context,
+                      void (*expect_context)(uint32_t, const Context*, bool),
+                      uint32_t seed) {
   std::unique_ptr<MinidumpContextWriter> context_writer =
-      MinidumpContextWriter::CreateFromSnapshot(&context_snapshot);
+      MinidumpContextWriter::CreateFromSnapshot(&snapshot_context);
   ASSERT_TRUE(context_writer);
 
   StringFile string_file;
   ASSERT_TRUE(context_writer->WriteEverything(&string_file));
 
-  const MinidumpContextX86* observed =
-      MinidumpWritableAtRVA<MinidumpContextX86>(string_file.string(), 0);
+  const Context* observed =
+      MinidumpWritableAtRVA<Context>(string_file.string(), 0);
   ASSERT_TRUE(observed);
 
-  ExpectMinidumpContextX86(kSeed, observed, true);
+  expect_context(seed, observed, true);
 }
 
-TEST(MinidumpContextWriter, CreateFromSnapshot_AMD64) {
+TEST(MinidumpContextWriter, X86_FromSnapshot) {
+  constexpr uint32_t kSeed = 32;
+  CPUContextX86 context_x86;
+  CPUContext context;
+  context.x86 = &context_x86;
+  InitializeCPUContextX86(&context, kSeed);
+  FromSnapshotTest<MinidumpContextX86Writer, MinidumpContextX86>(
+      context, ExpectMinidumpContextX86, kSeed);
+}
+
+TEST(MinidumpContextWriter, AMD64_FromSnapshot) {
   constexpr uint32_t kSeed = 64;
+  CPUContextX86_64 context_x86_64;
+  CPUContext context;
+  context.x86_64 = &context_x86_64;
+  InitializeCPUContextX86_64(&context, kSeed);
+  FromSnapshotTest<MinidumpContextAMD64Writer, MinidumpContextAMD64>(
+      context, ExpectMinidumpContextAMD64, kSeed);
+}
 
-  CPUContextX86_64 context_snapshot_x86_64;
-  CPUContext context_snapshot;
-  context_snapshot.x86_64 = &context_snapshot_x86_64;
-  InitializeCPUContextX86_64(&context_snapshot, kSeed);
+TEST(MinidumpContextWriter, ARM_Zeros) {
+  EmptyContextTest<MinidumpContextARMWriter, MinidumpContextARM>(
+      ExpectMinidumpContextARM);
+}
 
-  std::unique_ptr<MinidumpContextWriter> context_writer =
-      MinidumpContextWriter::CreateFromSnapshot(&context_snapshot);
-  ASSERT_TRUE(context_writer);
+TEST(MinidumpContextWRiter, ARM64_Zeros) {
+  EmptyContextTest<MinidumpContextARM64Writer, MinidumpContextARM64>(
+      ExpectMinidumpContextARM64);
+}
 
-  StringFile string_file;
-  ASSERT_TRUE(context_writer->WriteEverything(&string_file));
+TEST(MinidumpContextWriter, ARM_FromSnapshot) {
+  constexpr uint32_t kSeed = 32;
+  CPUContextARM context_arm;
+  CPUContext context;
+  context.arm = &context_arm;
+  InitializeCPUContextARM(&context, kSeed);
+  FromSnapshotTest<MinidumpContextARMWriter, MinidumpContextARM>(
+      context, ExpectMinidumpContextARM, kSeed);
+}
 
-  const MinidumpContextAMD64* observed =
-      MinidumpWritableAtRVA<MinidumpContextAMD64>(string_file.string(), 0);
-  ASSERT_TRUE(observed);
-
-  ExpectMinidumpContextAMD64(kSeed, observed, true);
+TEST(MinidumpContextWriter, ARM64_FromSnapshot) {
+  constexpr uint32_t kSeed = 64;
+  CPUContextARM64 context_arm64;
+  CPUContext context;
+  context.arm64 = &context_arm64;
+  InitializeCPUContextARM64(&context, kSeed);
+  FromSnapshotTest<MinidumpContextARM64Writer, MinidumpContextARM64>(
+      context, ExpectMinidumpContextARM64, kSeed);
 }
 
 }  // namespace

minidump/test/minidump_context_test_util.cc

@@ -140,6 +140,61 @@ void InitializeMinidumpContextAMD64(MinidumpContextAMD64* context,
   context->last_exception_from_rip = value++;
 }
 
+void InitializeMinidumpContextARM(MinidumpContextARM* context, uint32_t seed) {
+  if (seed == 0) {
+    memset(context, 0, sizeof(*context));
+    context->context_flags = kMinidumpContextARM;
+    return;
+  }
+
+  context->context_flags = kMinidumpContextARMAll;
+
+  uint32_t value = seed;
+
+  for (size_t index = 0; index < arraysize(context->regs); ++index) {
+    context->regs[index] = value++;
+  }
+  context->fp = value++;
+  context->ip = value++;
+  context->ip = value++;
+  context->sp = value++;
+  context->lr = value++;
+  context->pc = value++;
+  context->cpsr = value++;
+
+  for (size_t index = 0; index < arraysize(context->vfp); ++index) {
+    context->vfp[index] = value++;
+  }
+  context->fpscr = value++;
+}
+
+void InitializeMinidumpContextARM64(MinidumpContextARM64* context,
+                                    uint32_t seed) {
+  if (seed == 0) {
+    memset(context, 0, sizeof(*context));
+    context->context_flags = kMinidumpContextARM64;
+    return;
+  }
+
+  context->context_flags = kMinidumpContextARM64All;
+
+  uint32_t value = seed;
+
+  for (size_t index = 0; index < arraysize(context->regs); ++index) {
+    context->regs[index] = value++;
+  }
+  context->sp = value++;
+  context->pc = value++;
+  context->cpsr = value++;
+
+  for (size_t index = 0; index < arraysize(context->fpsimd); ++index) {
+    context->fpsimd[index].lo = value++;
+    context->fpsimd[index].hi = value++;
+  }
+  context->fpsr = value++;
+  context->fpcr = value++;
+}
+
 namespace {
 
 // Using gtest assertions, compares |expected| to |observed|. This is
@@ -350,5 +405,53 @@ void ExpectMinidumpContextAMD64(
   }
 }
 
+void ExpectMinidumpContextARM(uint32_t expect_seed,
+                              const MinidumpContextARM* observed,
+                              bool snapshot) {
+  MinidumpContextARM expected;
+  InitializeMinidumpContextARM(&expected, expect_seed);
+
+  EXPECT_EQ(observed->context_flags, expected.context_flags);
+
+  for (size_t index = 0; index < arraysize(expected.regs); ++index) {
+    EXPECT_EQ(observed->regs[index], expected.regs[index]);
+  }
+  EXPECT_EQ(observed->fp, expected.fp);
+  EXPECT_EQ(observed->ip, expected.ip);
+  EXPECT_EQ(observed->sp, expected.sp);
+  EXPECT_EQ(observed->lr, expected.lr);
+  EXPECT_EQ(observed->pc, expected.pc);
+  EXPECT_EQ(observed->cpsr, expected.cpsr);
+
+  EXPECT_EQ(observed->fpscr, expected.fpscr);
+  for (size_t index = 0; index < arraysize(expected.vfp); ++index) {
+    EXPECT_EQ(observed->vfp[index], expected.vfp[index]);
+  }
+  for (size_t index = 0; index < arraysize(expected.extra); ++index) {
+    EXPECT_EQ(observed->extra[index], snapshot ? 0 : expected.extra[index]);
+  }
+}
+
+void ExpectMinidumpContextARM64(uint32_t expect_seed,
+                                const MinidumpContextARM64* observed,
+                                bool snapshot) {
+  MinidumpContextARM64 expected;
+  InitializeMinidumpContextARM64(&expected, expect_seed);
+
+  EXPECT_EQ(observed->context_flags, expected.context_flags);
+
+  for (size_t index = 0; index < arraysize(expected.regs); ++index) {
+    EXPECT_EQ(observed->regs[index], expected.regs[index]);
+  }
+  EXPECT_EQ(observed->cpsr, expected.cpsr);
+
+  EXPECT_EQ(observed->fpsr, expected.fpsr);
+  EXPECT_EQ(observed->fpcr, expected.fpcr);
+  for (size_t index = 0; index < arraysize(expected.fpsimd); ++index) {
+    EXPECT_EQ(observed->fpsimd[index].lo, expected.fpsimd[index].lo);
+    EXPECT_EQ(observed->fpsimd[index].hi, expected.fpsimd[index].hi);
+  }
+}
+
 }  // namespace test
 }  // namespace crashpad

minidump/test/minidump_context_test_util.h

@@ -41,6 +41,9 @@ namespace test {
 void InitializeMinidumpContextX86(MinidumpContextX86* context, uint32_t seed);
 void InitializeMinidumpContextAMD64(MinidumpContextAMD64* context,
                                     uint32_t seed);
+void InitializeMinidumpContextARM(MinidumpContextARM* context, uint32_t seed);
+void InitializeMinidumpContextARM64(MinidumpContextARM64* context,
+                                    uint32_t seed);
 //! \}
 
 //! \brief Verifies, via gtest assertions, that a context structure contains
@@ -67,6 +70,12 @@ void ExpectMinidumpContextX86(
     uint32_t expect_seed, const MinidumpContextX86* observed, bool snapshot);
 void ExpectMinidumpContextAMD64(
     uint32_t expect_seed, const MinidumpContextAMD64* observed, bool snapshot);
+void ExpectMinidumpContextARM(uint32_t expect_seed,
+                              const MinidumpContextARM* observed,
+                              bool snapshot);
+void ExpectMinidumpContextARM64(uint32_t expect_seed,
+                                const MinidumpContextARM64* observed,
+                                bool snapshot);
 //! \}
 
 }  // namespace test

snapshot/test/test_cpu_context.cc

@@ -22,6 +22,68 @@
 namespace crashpad {
 namespace test {
 
+namespace {
+
+// This is templatized because the CPUContextX86::Fxsave and
+// CPUContextX86_64::Fxsave are nearly identical but have different sizes for
+// the members |xmm|, |reserved_4|, and |available|.
+template <typename FxsaveType>
+void InitializeCPUContextFxsave(FxsaveType* fxsave, uint32_t* seed) {
+  uint32_t value = *seed;
+
+  fxsave->fcw = static_cast<uint16_t>(value++);
+  fxsave->fsw = static_cast<uint16_t>(value++);
+  fxsave->ftw = static_cast<uint8_t>(value++);
+  fxsave->reserved_1 = static_cast<uint8_t>(value++);
+  fxsave->fop = static_cast<uint16_t>(value++);
+  fxsave->fpu_ip = value++;
+  fxsave->fpu_cs = static_cast<uint16_t>(value++);
+  fxsave->reserved_2 = static_cast<uint16_t>(value++);
+  fxsave->fpu_dp = value++;
+  fxsave->fpu_ds = static_cast<uint16_t>(value++);
+  fxsave->reserved_3 = static_cast<uint16_t>(value++);
+  fxsave->mxcsr = value++;
+  fxsave->mxcsr_mask = value++;
+  for (size_t st_mm_index = 0; st_mm_index < arraysize(fxsave->st_mm);
+       ++st_mm_index) {
+    for (size_t byte = 0; byte < arraysize(fxsave->st_mm[st_mm_index].st);
+         ++byte) {
+      fxsave->st_mm[st_mm_index].st[byte] = static_cast<uint8_t>(value++);
+    }
+    for (size_t byte = 0;
+         byte < arraysize(fxsave->st_mm[st_mm_index].st_reserved);
+         ++byte) {
+      fxsave->st_mm[st_mm_index].st_reserved[byte] =
+          static_cast<uint8_t>(value);
+    }
+  }
+  for (size_t xmm_index = 0; xmm_index < arraysize(fxsave->xmm); ++xmm_index) {
+    for (size_t byte = 0; byte < arraysize(fxsave->xmm[xmm_index]); ++byte) {
+      fxsave->xmm[xmm_index][byte] = static_cast<uint8_t>(value++);
+    }
+  }
+  for (size_t byte = 0; byte < arraysize(fxsave->reserved_4); ++byte) {
+    fxsave->reserved_4[byte] = static_cast<uint8_t>(value++);
+  }
+  for (size_t byte = 0; byte < arraysize(fxsave->available); ++byte) {
+    fxsave->available[byte] = static_cast<uint8_t>(value++);
+  }
+
+  *seed = value;
+}
+
+}  // namespace
+
+void InitializeCPUContextX86Fxsave(CPUContextX86::Fxsave* fxsave,
+                                   uint32_t* seed) {
+  return InitializeCPUContextFxsave(fxsave, seed);
+}
+
+void InitializeCPUContextX86_64Fxsave(CPUContextX86_64::Fxsave* fxsave,
+                                      uint32_t* seed) {
+  return InitializeCPUContextFxsave(fxsave, seed);
+}
+
 void InitializeCPUContextX86(CPUContext* context, uint32_t seed) {
   context->architecture = kCPUArchitectureX86;
 
@@ -101,68 +163,61 @@ void InitializeCPUContextX86_64(CPUContext* context, uint32_t seed) {
   context->x86_64->dr7 = value++;
 }
 
-namespace {
+void InitializeCPUContextARM(CPUContext* context, uint32_t seed) {
+  context->architecture = kCPUArchitectureARM;
+  CPUContextARM* arm = context->arm;
 
-// This is templatized because the CPUContextX86::Fxsave and
-// CPUContextX86_64::Fxsave are nearly identical but have different sizes for
-// the members |xmm|, |reserved_4|, and |available|.
-template <typename FxsaveType>
-void InitializeCPUContextFxsave(FxsaveType* fxsave, uint32_t* seed) {
-  uint32_t value = *seed;
-
-  fxsave->fcw = static_cast<uint16_t>(value++);
-  fxsave->fsw = static_cast<uint16_t>(value++);
-  fxsave->ftw = static_cast<uint8_t>(value++);
-  fxsave->reserved_1 = static_cast<uint8_t>(value++);
-  fxsave->fop = static_cast<uint16_t>(value++);
-  fxsave->fpu_ip = value++;
-  fxsave->fpu_cs = static_cast<uint16_t>(value++);
-  fxsave->reserved_2 = static_cast<uint16_t>(value++);
-  fxsave->fpu_dp = value++;
-  fxsave->fpu_ds = static_cast<uint16_t>(value++);
-  fxsave->reserved_3 = static_cast<uint16_t>(value++);
-  fxsave->mxcsr = value++;
-  fxsave->mxcsr_mask = value++;
-  for (size_t st_mm_index = 0;
-       st_mm_index < arraysize(fxsave->st_mm);
-       ++st_mm_index) {
-    for (size_t byte = 0;
-         byte < arraysize(fxsave->st_mm[st_mm_index].st);
-         ++byte) {
-      fxsave->st_mm[st_mm_index].st[byte] = static_cast<uint8_t>(value++);
-    }
-    for (size_t byte = 0;
-         byte < arraysize(fxsave->st_mm[st_mm_index].st_reserved);
-         ++byte) {
-      fxsave->st_mm[st_mm_index].st_reserved[byte] =
-          static_cast<uint8_t>(value);
-    }
-  }
-  for (size_t xmm_index = 0; xmm_index < arraysize(fxsave->xmm); ++xmm_index) {
-    for (size_t byte = 0; byte < arraysize(fxsave->xmm[xmm_index]); ++byte) {
-      fxsave->xmm[xmm_index][byte] = static_cast<uint8_t>(value++);
-    }
-  }
-  for (size_t byte = 0; byte < arraysize(fxsave->reserved_4); ++byte) {
-    fxsave->reserved_4[byte] = static_cast<uint8_t>(value++);
-  }
-  for (size_t byte = 0; byte < arraysize(fxsave->available); ++byte) {
-    fxsave->available[byte] = static_cast<uint8_t>(value++);
+  if (seed == 0) {
+    memset(arm, 0, sizeof(*arm));
+    return;
   }
 
-  *seed = value;
+  uint32_t value = seed;
+
+  for (size_t index = 0; index < arraysize(arm->regs); ++index) {
+    arm->regs[index] = value++;
+  }
+  arm->fp = value++;
+  arm->ip = value++;
+  arm->ip = value++;
+  arm->sp = value++;
+  arm->lr = value++;
+  arm->pc = value++;
+  arm->cpsr = value++;
+
+  for (size_t index = 0; index < arraysize(arm->vfp_regs.vfp); ++index) {
+    arm->vfp_regs.vfp[index] = value++;
+  }
+  arm->vfp_regs.fpscr = value++;
+
+  arm->have_fpa_regs = false;
+  arm->have_vfp_regs = true;
 }
 
-}  // namespace
+void InitializeCPUContextARM64(CPUContext* context, uint32_t seed) {
+  context->architecture = kCPUArchitectureARM64;
+  CPUContextARM64* arm64 = context->arm64;
 
-void InitializeCPUContextX86Fxsave(CPUContextX86::Fxsave* fxsave,
-                                   uint32_t* seed) {
-  return InitializeCPUContextFxsave(fxsave, seed);
-}
+  if (seed == 0) {
+    memset(arm64, 0, sizeof(*arm64));
+    return;
+  }
 
-void InitializeCPUContextX86_64Fxsave(CPUContextX86_64::Fxsave* fxsave,
-                                      uint32_t* seed) {
-  return InitializeCPUContextFxsave(fxsave, seed);
+  uint32_t value = seed;
+
+  for (size_t index = 0; index < arraysize(arm64->regs); ++index) {
+    arm64->regs[index] = value++;
+  }
+  arm64->sp = value++;
+  arm64->pc = value++;
+  arm64->pstate = value++;
+
+  for (size_t index = 0; index < arraysize(arm64->fpsimd); ++index) {
+    arm64->fpsimd[index].lo = value++;
+    arm64->fpsimd[index].hi = value++;
+  }
+  arm64->fpsr = value++;
+  arm64->fpcr = value++;
 }
 
 }  // namespace test

snapshot/test/test_cpu_context.h

@@ -22,6 +22,25 @@
 namespace crashpad {
 namespace test {
 
+//! \brief Initializes an `fxsave` context substructure for testing.
+//!
+//! \param[out] fxsave The structure to initialize.
+//! \param[in,out] seed The seed value. Initializing two `fxsave` structures of
+//!     the same type with identical seed values should produce identical
+//!     structures. Initialization with a different seed value should produce
+//!     a different `fxsave` structure. If \a seed is `0`, \a fxsave is zeroed
+//!     out entirely. If \a seed is nonzero, \a fxsave will be populated
+//!     entirely with nonzero values. \a seed will be updated by this function
+//!     to allow the caller to perform subsequent initialization of the context
+//!     structure containing \a fxsave.
+//!
+//! \{
+void InitializeCPUContextX86Fxsave(CPUContextX86::Fxsave* fxsave,
+                                   uint32_t* seed);
+void InitializeCPUContextX86_64Fxsave(CPUContextX86_64::Fxsave* fxsave,
+                                      uint32_t* seed);
+//! \}
+
 //! \brief Initializes a context structure for testing.
 //!
 //! Initialization is compatible with the initialization used by minidump
@@ -40,25 +59,8 @@ namespace test {
 //! \{
 void InitializeCPUContextX86(CPUContext* context, uint32_t seed);
 void InitializeCPUContextX86_64(CPUContext* context, uint32_t seed);
-//! \}
-
-//! \brief Initializes an `fxsave` context substructure for testing.
-//!
-//! \param[out] fxsave The structure to initialize.
-//! \param[in,out] seed The seed value. Initializing two `fxsave` structures of
-//!     the same type with identical seed values should produce identical
-//!     structures. Initialization with a different seed value should produce
-//!     a different `fxsave` structure. If \a seed is `0`, \a fxsave is zeroed
-//!     out entirely. If \a seed is nonzero, \a fxsave will be populated
-//!     entirely with nonzero values. \a seed will be updated by this function
-//!     to allow the caller to perform subsequent initialization of the context
-//!     structure containing \a fxsave.
-//!
-//! \{
-void InitializeCPUContextX86Fxsave(
-    CPUContextX86::Fxsave* fxsave, uint32_t* seed);
-void InitializeCPUContextX86_64Fxsave(
-    CPUContextX86_64::Fxsave* fxsave, uint32_t* seed);
+void InitializeCPUContextARM(CPUContext* context, uint32_t seed);
+void InitializeCPUContextARM64(CPUContext* context, uint32_t seed);
 //! \}
 
 }  // namespace test