dart::CodeSourceMapOps Struct Reference

#include <code_descriptors.h>

Inheritance diagram for dart::CodeSourceMapOps:

Static Public Member Functions
static uint8_t	Read (ReadStream *stream, int32_t *arg1, int32_t *arg2=nullptr)
static void	Write (BaseWriteStream *stream, uint8_t op, int32_t arg1=0, int32_t arg2=0)

Static Public Attributes
static constexpr uint8_t	kChangePosition = 0
static constexpr uint8_t	kAdvancePC = 1
static constexpr uint8_t	kPushFunction = 2
static constexpr uint8_t	kPopFunction = 3
static constexpr uint8_t	kNullCheck = 4

Detailed Description

Definition at line 193 of file code_descriptors.h.

Member Function Documentation

Read()

uint8_t dart::CodeSourceMapOps::Read ( ReadStream *  stream, int32_t *  arg1, int32_t *  arg2 = nullptr  )

static

Definition at line 243 of file code_descriptors.cc.

                                              {
  ASSERT(stream != nullptr && arg1 != nullptr);
  const int32_t n = stream->Read<int32_t>();
  const uint8_t op = OpField::decode(n);
  *arg1 = ArgField::decode(n);
  if (*arg1 > kMaxArgValue) {
    *arg1 |= kSignBits;
  }
#if defined(DART_PRECOMPILER)
  // The special handling for non-symbolic stack trace mode only needs to
  // happen in the precompiler, because those CSMs are not serialized in
  // precompiled snapshots.
  if (op == kChangePosition && FLAG_dwarf_stack_traces_mode) {
    const int32_t m = stream->Read<int32_t>();
    if (arg2 != nullptr) {
      *arg2 = m;
    }
  }
#endif
  return op;
}

Write()

void dart::CodeSourceMapOps::Write ( BaseWriteStream *  stream, uint8_t  op, int32_t  arg1 = 0, int32_t  arg2 = 0  )

static

Definition at line 267 of file code_descriptors.cc.

                                           {
  ASSERT(stream != nullptr);
  ASSERT(arg1 >= kMinArgValue && arg1 <= kMaxArgValue);
  if (arg1 < 0) {
    arg1 &= ~kSignBits;
  }
  const int32_t n = OpField::encode(op) | ArgField::encode(arg1);
  stream->Write(n);
#if defined(DART_PRECOMPILER)
  if (op == kChangePosition && FLAG_dwarf_stack_traces_mode) {
    // For non-symbolic stack traces, the CodeSourceMaps are not serialized,
    // so we need not worry about increasing snapshot size by including more
    // information here.
    stream->Write(arg2);
  }
#endif
}

Member Data Documentation

kAdvancePC

constexpr uint8_t dart::CodeSourceMapOps::kAdvancePC = 1

staticconstexpr

Definition at line 195 of file code_descriptors.h.

kChangePosition

constexpr uint8_t dart::CodeSourceMapOps::kChangePosition = 0

staticconstexpr

Definition at line 194 of file code_descriptors.h.

kNullCheck

constexpr uint8_t dart::CodeSourceMapOps::kNullCheck = 4

staticconstexpr

Definition at line 198 of file code_descriptors.h.

kPopFunction

constexpr uint8_t dart::CodeSourceMapOps::kPopFunction = 3

staticconstexpr

Definition at line 197 of file code_descriptors.h.

kPushFunction

constexpr uint8_t dart::CodeSourceMapOps::kPushFunction = 2

staticconstexpr

Definition at line 196 of file code_descriptors.h.

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The documentation for this struct was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/code_descriptors.h
• third_party/dart-lang/sdk/runtime/vm/code_descriptors.cc