src/third_party/v8/src/wasm/memory-tracing.cc

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/wasm/memory-tracing.h"

#include <cinttypes>

#include "src/base/memory.h"
#include "src/utils/utils.h"
#include "src/utils/vector.h"

namespace v8 {
namespace internal {
namespace wasm {

void TraceMemoryOperation(base::Optional<ExecutionTier> tier,
                          const MemoryTracingInfo* info, int func_index,
                          int position, uint8_t* mem_start) {
  EmbeddedVector<char, 91> value;
  auto mem_rep = static_cast<MachineRepresentation>(info->mem_rep);
  Address address = reinterpret_cast<Address>(mem_start) + info->offset;
  switch (mem_rep) {
#define TRACE_TYPE(rep, str, format, ctype1, ctype2)        \
  case MachineRepresentation::rep:                          \
    SNPrintF(value, str ":" format,                         \
             base::ReadLittleEndianValue<ctype1>(address),  \
             base::ReadLittleEndianValue<ctype2>(address)); \
    break;
    TRACE_TYPE(kWord8, " i8", "%d / %02x", uint8_t, uint8_t)
    TRACE_TYPE(kWord16, "i16", "%d / %04x", uint16_t, uint16_t)
    TRACE_TYPE(kWord32, "i32", "%d / %08x", uint32_t, uint32_t)
    TRACE_TYPE(kWord64, "i64", "%" PRId64 " / %016" PRIx64, uint64_t, uint64_t)
    TRACE_TYPE(kFloat32, "f32", "%f / %08x", float, uint32_t)
    TRACE_TYPE(kFloat64, "f64", "%f / %016" PRIx64, double, uint64_t)
#undef TRACE_TYPE
    case MachineRepresentation::kSimd128:
      SNPrintF(value, "s128:%d %d %d %d / %08x %08x %08x %08x",
               base::ReadLittleEndianValue<uint32_t>(address),
               base::ReadLittleEndianValue<uint32_t>(address + 4),
               base::ReadLittleEndianValue<uint32_t>(address + 8),
               base::ReadLittleEndianValue<uint32_t>(address + 12),
               base::ReadLittleEndianValue<uint32_t>(address),
               base::ReadLittleEndianValue<uint32_t>(address + 4),
               base::ReadLittleEndianValue<uint32_t>(address + 8),
               base::ReadLittleEndianValue<uint32_t>(address + 12));
      break;
    default:
      SNPrintF(value, "???");
  }
  const char* eng =
      tier.has_value() ? ExecutionTierToString(tier.value()) : "?";
  printf("%-11s func:%6d+0x%-6x%s %016" PRIuPTR " val: %s\n", eng, func_index,
         position, info->is_store ? " store to" : "load from", info->offset,
         value.begin());
}

}  // namespace wasm
}  // namespace internal
}  // namespace v8