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[C2AST] Generate AST from C code #38

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felixpk opened this issue Jan 20, 2022 · 3 comments · May be fixed by #261
Open

[C2AST] Generate AST from C code #38

felixpk opened this issue Jan 20, 2022 · 3 comments · May be fixed by #261
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@felixpk
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felixpk commented Jan 20, 2022

Proposal

Writing AST tests can be quite verbose, therefore I propose to implement a converter which translates c code to dewolfs AST implementation.

Approach

  1. Use pycparser to generate an intermediate AST representation
  2. Translate each AST node to dewolfs AST representation
@felixpk felixpk added the feature-request New feature or request label Jan 20, 2022
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felixpk commented Jan 20, 2022

/cib

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Branch issue-38-_C2AST_Generate_AST_from_C_code created!

github-actions bot pushed a commit that referenced this issue Jan 20, 2022
@felixpk
Create draft PR for #38
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@github-actions github-actions bot mentioned this issue Jan 20, 2022
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felixpk commented Jan 20, 2022 •
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What does currently work?

  • AbstractSyntaxTreeNode
  • Expression
  • Instruction
  • Operation
  • Distinction between Function and Imported Function Symbols
  • Compound operators

What does currently not work?

  • printf("i is %d\n", i); becomes printf("i is %d\\n", i); (encoding problem)

  • comments are ignored (pycparser limitation)

  • If the input code contains an array like int numbers[10]; we need to convert it to int *numbers = malloc(sizeof(int) * 10); this implies that we also have to free the allocated memory after the last usage of numbers.

  • Structs are not implemented in dewolf

    struct {
  int age;
  char* name;
} p1;

p1.age = 18;
p1.name = "Peter";

    (Not sure how to convert it)

@NeoQuix NeoQuix linked a pull request Jun 27, 2023 that will close this issue
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@NeoQuix NeoQuix linked a pull request Jun 27, 2023 that will close this issue
CAST-Generator #261
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@NeoQuix NeoQuix self-assigned this Jun 27, 2023
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CAST-Generator fkie-cad/dewolf
[C2AST] Generate AST from C code fkie-cad/dewolf
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@felixpk @NeoQuix