Improving the support for Fuchsia in Breakpad Processor.

Now decoding the OS name and exception codes for Fuchsia. Still not decoding exception flags (can be added later, if needed).

Change-Id: If66cb000828be18f0c1b35d1b1f52b3ca3e1fd67
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1699049
Reviewed-by: Mark Mentovai <mark@chromium.org>

src/google_breakpad/common/minidump_exception_fuchsia.h

@@ -0,0 +1,58 @@
+/* Copyright (c) 2019, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+/* minidump_exception_fuchsia.h: A definition of exception codes for Fuchsia.
+ *
+ * Author: Ivan Penkov */
+
+#ifndef GOOGLE_BREAKPAD_COMMON_MINIDUMP_EXCEPTION_FUCHSIA_H_
+#define GOOGLE_BREAKPAD_COMMON_MINIDUMP_EXCEPTION_FUCHSIA_H_
+
+#include <stddef.h>
+
+#include "google_breakpad/common/breakpad_types.h"
+
+// Based on zircon/system/public/zircon/syscalls/exception.h
+typedef enum {
+  // Architectural exceptions
+  MD_EXCEPTION_CODE_FUCHSIA_GENERAL = 0x8,
+  MD_EXCEPTION_CODE_FUCHSIA_FATAL_PAGE_FAULT = 0x108,
+  MD_EXCEPTION_CODE_FUCHSIA_UNDEFINED_INSTRUCTION = 0x208,
+  MD_EXCEPTION_CODE_FUCHSIA_SW_BREAKPOINT = 0x308,
+  MD_EXCEPTION_CODE_FUCHSIA_HW_BREAKPOINT = 0x408,
+  MD_EXCEPTION_CODE_FUCHSIA_UNALIGNED_ACCESS = 0x508,
+  //
+  // Synthetic exceptions
+  MD_EXCEPTION_CODE_FUCHSIA_THREAD_STARTING = 0x8008,
+  MD_EXCEPTION_CODE_FUCHSIA_THREAD_EXITING = 0x8108,
+  MD_EXCEPTION_CODE_FUCHSIA_POLICY_ERROR = 0x8208,
+  MD_EXCEPTION_CODE_FUCHSIA_PROCESS_STARTING = 0x8308,
+} MDExceptionCodeFuchsia;
+
+#endif  // GOOGLE_BREAKPAD_COMMON_MINIDUMP_EXCEPTION_FUCHSIA_H_

src/google_breakpad/common/minidump_format.h

@@ -549,6 +549,7 @@ typedef struct {
   uint64_t  exception_information[MD_EXCEPTION_MAXIMUM_PARAMETERS];
 } MDException;  /* MINIDUMP_EXCEPTION */
 
+#include "minidump_exception_fuchsia.h"
 #include "minidump_exception_linux.h"
 #include "minidump_exception_mac.h"
 #include "minidump_exception_ps3.h"
@@ -678,7 +679,8 @@ typedef enum {
   MD_OS_SOLARIS       = 0x8202,  /* Solaris */
   MD_OS_ANDROID       = 0x8203,  /* Android */
   MD_OS_PS3           = 0x8204,  /* PS3 */
-  MD_OS_NACL          = 0x8205   /* Native Client (NaCl) */
+  MD_OS_NACL          = 0x8205,  /* Native Client (NaCl) */
+  MD_OS_FUCHSIA       = 0x8206   /* Fuchsia */
 } MDOSPlatform;
 
 typedef struct {

src/processor/exploitability.cc

@@ -93,6 +93,7 @@ Exploitability *Exploitability::ExploitabilityForPlatform(
     case MD_OS_SOLARIS:
     case MD_OS_ANDROID:
     case MD_OS_PS3:
+    case MD_OS_FUCHSIA:
     default: {
       platform_exploitability = NULL;
       break;

src/processor/minidump.cc

@@ -2016,6 +2016,7 @@ string MinidumpModule::code_identifier() const {
     }
 
     case MD_OS_ANDROID:
+    case MD_OS_FUCHSIA:
     case MD_OS_LINUX: {
       // If ELF CodeView data is present, return the debug id.
       if (cv_record_ && cv_record_signature_ == MD_CVINFOELF_SIGNATURE) {
@@ -3502,6 +3503,10 @@ string MinidumpSystemInfo::GetOS() {
       os = "nacl";
       break;
 
+    case MD_OS_FUCHSIA:
+      os = "fuchsia";
+      break;
+
     default:
       BPLOG(ERROR) << "MinidumpSystemInfo unknown OS for platform " <<
                       HexString(system_info_.platform_id);

src/processor/minidump_processor.cc

@@ -647,6 +647,11 @@ bool MinidumpProcessor::GetOSInfo(Minidump *dump, SystemInfo *info) {
       break;
     }
 
+    case MD_OS_FUCHSIA: {
+      info->os = "Fuchsia";
+      break;
+    }
+
     default: {
       // Assign the numeric platform ID into the OS string.
       char os_string[11];
@@ -717,10 +722,12 @@ string MinidumpProcessor::GetCrashReason(Minidump *dump, uint64_t *address) {
   // map the codes to a string (because there's no system info, or because
   // it's an unrecognized platform, or because it's an unrecognized code.)
   char reason_string[24];
+  char flags_string[11];
   uint32_t exception_code = raw_exception->exception_record.exception_code;
   uint32_t exception_flags = raw_exception->exception_record.exception_flags;
-  snprintf(reason_string, sizeof(reason_string), "0x%08x / 0x%08x",
+  snprintf(flags_string, sizeof(flags_string), "0x%08x", exception_flags);
-           exception_code, exception_flags);
+  snprintf(reason_string, sizeof(reason_string), "0x%08x / %s", exception_code,
+           flags_string);
   string reason = reason_string;
 
   const MDRawSystemInfo *raw_system_info = GetSystemInfo(dump, NULL);
@@ -728,10 +735,56 @@ string MinidumpProcessor::GetCrashReason(Minidump *dump, uint64_t *address) {
     return reason;
 
   switch (raw_system_info->platform_id) {
+    case MD_OS_FUCHSIA: {
+      switch (exception_code) {
+        case MD_EXCEPTION_CODE_FUCHSIA_GENERAL:
+          reason = "GENERAL / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_FATAL_PAGE_FAULT:
+          reason = "FATAL_PAGE_FAULT / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_UNDEFINED_INSTRUCTION:
+          reason = "UNDEFINED_INSTRUCTION / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_SW_BREAKPOINT:
+          reason = "SW_BREAKPOINT / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_HW_BREAKPOINT:
+          reason = "HW_BREAKPOINT / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_UNALIGNED_ACCESS:
+          reason = "UNALIGNED_ACCESS / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_THREAD_STARTING:
+          reason = "THREAD_STARTING / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_THREAD_EXITING:
+          reason = "THREAD_EXITING / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_POLICY_ERROR:
+          reason = "POLICY_ERROR / ";
+          reason.append(flags_string);
+          break;
+        case MD_EXCEPTION_CODE_FUCHSIA_PROCESS_STARTING:
+          reason = "PROCESS_STARTING / ";
+          reason.append(flags_string);
+          break;
+        default:
+          BPLOG(INFO) << "Unknown exception reason " << reason;
+      }
+      break;
+    }
+
     case MD_OS_MAC_OS_X:
     case MD_OS_IOS: {
-      char flags_string[11];
-      snprintf(flags_string, sizeof(flags_string), "0x%08x", exception_flags);
       switch (exception_code) {
         case MD_EXCEPTION_MAC_BAD_ACCESS:
           reason = "EXC_BAD_ACCESS / ";
@@ -1239,8 +1292,6 @@ string MinidumpProcessor::GetCrashReason(Minidump *dump, uint64_t *address) {
 
     case MD_OS_ANDROID:
     case MD_OS_LINUX: {
-      char flags_string[11];
-      snprintf(flags_string, sizeof(flags_string), "0x%08x", exception_flags);
       switch (exception_code) {
         case MD_EXCEPTION_CODE_LIN_SIGHUP:
           reason = "SIGHUP";