memory-tracing.cc 2.51 KB
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// 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"

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#include <cinttypes>

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#include "src/base/memory.h"
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#include "src/base/strings.h"
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#include "src/base/vector.h"
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namespace v8 {
namespace internal {
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namespace wasm {
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void TraceMemoryOperation(base::Optional<ExecutionTier> tier,
                          const MemoryTracingInfo* info, int func_index,
                          int position, uint8_t* mem_start) {
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  base::EmbeddedVector<char, 91> value;
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  auto mem_rep = static_cast<MachineRepresentation>(info->mem_rep);
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  Address address = reinterpret_cast<Address>(mem_start) + info->offset;
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  switch (mem_rep) {
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#define TRACE_TYPE(rep, str, format, ctype1, ctype2)              \
  case MachineRepresentation::rep:                                \
    base::SNPrintF(value, str ":" format,                         \
                   base::ReadLittleEndianValue<ctype1>(address),  \
                   base::ReadLittleEndianValue<ctype2>(address)); \
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    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
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    case MachineRepresentation::kSimd128:
      SNPrintF(value, "s128:%d %d %d %d / %08x %08x %08x %08x",
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               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));
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      break;
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    default:
      SNPrintF(value, "???");
  }
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  const char* eng =
      tier.has_value() ? ExecutionTierToString(tier.value()) : "?";
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  printf("%-11s func:%6d:0x%-6x%s %016" PRIuPTR " val: %s\n", eng, func_index,
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         position, info->is_store ? " store to" : "load from", info->offset,
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         value.begin());
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}

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