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Use T_UNINIT as lower bound for types #806

Merged
merged 1 commit into from
Nov 24, 2024
Merged

Use T_UNINIT as lower bound for types #806

merged 1 commit into from
Nov 24, 2024

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elazarg
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@elazarg elazarg commented Nov 24, 2024

Fix a crash when running on build/loop.o.

Summary by CodeRabbit

  • New Features

    • Updated the minimum type encoding value to enhance type encoding operations.
  • Bug Fixes

    • Reviewed logic surrounding type encoding usage for compatibility with the new minimum value.

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coderabbitai bot commented Nov 24, 2024

Walkthrough

The changes in this pull request involve an update to the constant T_MIN within the type_encoding_t enumeration in the src/crab/type_encoding.hpp file. The value of T_MIN has been changed from T_MAP_PROGRAMS to T_UNINIT, while the maximum value T_MAX remains as T_SHARED. This modification affects the minimum type encoding value used in type encoding operations, but does not alter any function signatures or the overall structure of the enums or classes.

Changes

File Change Summary
src/crab/type_encoding.hpp Updated constexpr type_encoding_t T_MIN from T_MAP_PROGRAMS to T_UNINIT.

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: ASSERTIVE

📥 Commits

Reviewing files that changed from the base of the PR and between e09c6a7 and 26f7032.

📒 Files selected for processing (1)
  • src/crab/type_encoding.hpp (1 hunks)
🔇 Additional comments (1)
src/crab/type_encoding.hpp (1)

43-43: Verify TypeGroup behavior with T_UNINIT

The change to include T_UNINIT in the valid range is logical for handling uninitialized values. However, verify that TypeGroup comparisons handle T_UNINIT correctly.

✅ Verification successful

T_UNINIT is handled correctly in TypeGroup comparisons

The codebase shows that TypeGroup comparisons are implemented safely with respect to T_UNINIT:

  • mem: checks reg >= T_PACKET - unaffected by T_UNINIT
  • mem_or_num: checks reg >= T_NUM && reg != T_CTX - unaffected by T_UNINIT
  • pointer: checks reg >= T_CTX - unaffected by T_UNINIT
  • ptr_or_num: checks reg >= T_NUM - unaffected by T_UNINIT
  • stack_or_packet: checks reg >= T_PACKET && reg <= T_STACK - unaffected by T_UNINIT
  • singleton_ptr: checks reg >= T_CTX && reg <= T_STACK - unaffected by T_UNINIT

All TypeGroup comparisons use either equality checks or lower bounds that are higher than T_UNINIT (-7), making the change safe.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check if TypeGroup implementations handle T_UNINIT correctly
# Look for comparisons against type_encoding_t values that might need adjustment

# Search for type comparisons in implementation files
rg "T_(UNINIT|MAP_PROGRAMS|NUM|CTX|PACKET|STACK|SHARED)" --type cpp -A 2 -B 2

# Look for TypeGroup-related code
ast-grep --pattern 'TypeGroup'

Length of output: 36886

src/crab/type_encoding.hpp Show resolved Hide resolved
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Coverage Status

coverage: 89.643% (-0.02%) from 89.665%
when pulling 26f7032 on min-T_UNINIT
into e09c6a7 on main.

@elazarg elazarg merged commit bb88996 into main Nov 24, 2024
19 checks passed
@elazarg elazarg deleted the min-T_UNINIT branch November 24, 2024 16:36
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2 participants