linux_core_dumper: support setting exception_information

Many signals in Linux support additional metadata on a per-signal
basis.  We can extract that from NT_SIGINFO and pass it through
in the exception_information fields.

The current core dumper logic doesn't set exception_information
at all, so this is an improvement.

Bug: google-breakpad:791
Change-Id: I38b78d6494e9bc682441750d98ac9be5b0656f5a
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/1497662
Reviewed-by: Mark Mentovai <mark@chromium.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/client/linux/minidump_writer/linux_dumper.h b/src/client/linux/minidump_writer/linux_dumper.h
index 76448fad..f4a75d90 100644
--- a/src/client/linux/minidump_writer/linux_dumper.h
+++ b/src/client/linux/minidump_writer/linux_dumper.h
@@ -38,6 +38,7 @@
 #ifndef CLIENT_LINUX_MINIDUMP_WRITER_LINUX_DUMPER_H_
 #define CLIENT_LINUX_MINIDUMP_WRITER_LINUX_DUMPER_H_
 
+#include <assert.h>
 #include <elf.h>
 #if defined(__ANDROID__)
 #include <link.h>
@@ -47,6 +48,8 @@
 #include <sys/types.h>
 #include <sys/user.h>
 
+#include <vector>
+
 #include "client/linux/dump_writer_common/mapping_info.h"
 #include "client/linux/dump_writer_common/thread_info.h"
 #include "common/linux/file_id.h"
@@ -184,6 +187,14 @@ class LinuxDumper {
   void set_crash_signal_code(int code) { crash_signal_code_ = code; }
   int crash_signal_code() const { return crash_signal_code_; }
 
+  void set_crash_exception_info(const std::vector<uint64_t>& exception_info) {
+    assert(exception_info.size() <= MD_EXCEPTION_MAXIMUM_PARAMETERS);
+    crash_exception_info_ = exception_info;
+  }
+  const std::vector<uint64_t>& crash_exception_info() const {
+    return crash_exception_info_;
+  }
+
   pid_t crash_thread() const { return crash_thread_; }
   void set_crash_thread(pid_t crash_thread) { crash_thread_ = crash_thread; }
 
@@ -236,6 +247,9 @@ class LinuxDumper {
   // The code associated with |crash_signal_|.
   int crash_signal_code_;
 
+  // The additional fields associated with |crash_signal_|.
+  std::vector<uint64_t> crash_exception_info_;
+
   // ID of the crashed thread.
   pid_t crash_thread_;