deps: update V8 to 7.8.279.9

PR-URL: https://github.com/nodejs/node/pull/29694
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>

1 files changed, 72 insertions, 4 deletions

diff --git a/deps/v8/src/profiler/tick-sample.h b/deps/v8/src/profiler/tick-sample.h
index ba78c923c4..37ae1e9d06 100644
--- a/deps/v8/src/profiler/tick-sample.h
+++ b/deps/v8/src/profiler/tick-sample.h
@@ -5,7 +5,7 @@
 #ifndef V8_PROFILER_TICK_SAMPLE_H_
 #define V8_PROFILER_TICK_SAMPLE_H_
 
-#include "include/v8-profiler.h"
+#include "include/v8.h"
 #include "src/base/platform/time.h"
 #include "src/common/globals.h"
 
@@ -14,15 +14,83 @@ namespace internal {
 
 class Isolate;
 
-struct TickSample : public v8::TickSample {
+// TickSample captures the information collected for each sample.
+struct V8_EXPORT TickSample {
+  // Internal profiling (with --prof + tools/$OS-tick-processor) wants to
+  // include the runtime function we're calling. Externally exposed tick
+  // samples don't care.
+  enum RecordCEntryFrame { kIncludeCEntryFrame, kSkipCEntryFrame };
+
+  TickSample()
+      : state(OTHER),
+        pc(nullptr),
+        external_callback_entry(nullptr),
+        frames_count(0),
+        has_external_callback(false),
+        update_stats(true) {}
+
+  /**
+   * Initialize a tick sample from the isolate.
+   * \param isolate The isolate.
+   * \param state Execution state.
+   * \param record_c_entry_frame Include or skip the runtime function.
+   * \param update_stats Whether update the sample to the aggregated stats.
+   * \param use_simulator_reg_state When set to true and V8 is running under a
+   *                                simulator, the method will use the simulator
+   *                                register state rather than the one provided
+   *                                with |state| argument. Otherwise the method
+   *                                will use provided register |state| as is.
+   */
   void Init(Isolate* isolate, const v8::RegisterState& state,
             RecordCEntryFrame record_c_entry_frame, bool update_stats,
             bool use_simulator_reg_state = true,
             base::TimeDelta sampling_interval = base::TimeDelta());
-  base::TimeTicks timestamp;
-  base::TimeDelta sampling_interval;  // Sampling interval used to capture.
+  /**
+   * Get a call stack sample from the isolate.
+   * \param isolate The isolate.
+   * \param state Register state.
+   * \param record_c_entry_frame Include or skip the runtime function.
+   * \param frames Caller allocated buffer to store stack frames.
+   * \param frames_limit Maximum number of frames to capture. The buffer must
+   *                     be large enough to hold the number of frames.
+   * \param sample_info The sample info is filled up by the function
+   *                    provides number of actual captured stack frames and
+   *                    the current VM state.
+   * \param use_simulator_reg_state When set to true and V8 is running under a
+   *                                simulator, the method will use the simulator
+   *                                register state rather than the one provided
+   *                                with |state| argument. Otherwise the method
+   *                                will use provided register |state| as is.
+   * \note GetStackSample is thread and signal safe and should only be called
+   *                      when the JS thread is paused or interrupted.
+   *                      Otherwise the behavior is undefined.
+   */
+  static bool GetStackSample(Isolate* isolate, v8::RegisterState* state,
+                             RecordCEntryFrame record_c_entry_frame,
+                             void** frames, size_t frames_limit,
+                             v8::SampleInfo* sample_info,
+                             bool use_simulator_reg_state = true,
+                             void** contexts = nullptr);
 
   void print() const;
+
+  StateTag state;  // The state of the VM.
+  void* pc;        // Instruction pointer.
+  union {
+    void* tos;  // Top stack value (*sp).
+    void* external_callback_entry;
+  };
+  static const unsigned kMaxFramesCountLog2 = 8;
+  static const unsigned kMaxFramesCount = (1 << kMaxFramesCountLog2) - 1;
+  void* stack[kMaxFramesCount];     // Call stack.
+  void* contexts[kMaxFramesCount];  // Stack of associated native contexts.
+  void* top_context = nullptr;      // Address of the incumbent native context.
+  unsigned frames_count : kMaxFramesCountLog2;  // Number of captured frames.
+  bool has_external_callback : 1;
+  bool update_stats : 1;  // Whether the sample should update aggregated stats.
+
+  base::TimeTicks timestamp;
+  base::TimeDelta sampling_interval;  // Sampling interval used to capture.
 };
 
 }  // namespace internal