clang Plugins

🔨 Some tools for implement customization during compilation using clang.

Build

mkdir build
cd build
CC=clang CXX=clang++ cmake cmake -DLLVM_DIR=/path/to/llvm/cmake  -DLT_LLVM_INSTALL_DIR=/path/to/llvm/ -DCMAKE_EXPORT_COMPILE_COMMANDS=ON ..
make -j

Run

Eg. Using libViewIf.so

# Only clang frontend:
clang -cc1 -load libViewIf.so -plugin view-if-ast  tests/iftest2.c
# or
clang -Xclang -add-plugin -fplugin=libViewIf.so -Xclang view-if-ast  ../tests/iftest2.c -o iftest2
# Using in repo
CC="clang -Xclang -add-plugin -fplugin=/path/to/libViewIf.so -Xclang view-if-ast"
CXX="clang++ -Xclang -add-plugin -fplugin=/path/to/libViewIf.so -Xclang view-if-ast"

Output :

➜  build git:(master) ✗ clang -cc1 -load libViewIf.so -plugin view-if-ast  ../tests/iftest2.c
../tests/iftest2.c:7:9: warning: implicitly declaring library function 'printf' with type 'int (const char *, ...)'
        printf("Number is greater than 5\n");
        ^
../tests/iftest2.c:7:9: note: include the header <stdio.h> or explicitly provide a declaration for 'printf'
Found an if statement:
Condition: 0x55555a3d8d68
Source Code:
if (num > 5) {
        printf("Number is greater than 5\n");
	return 1;
    } else {
        printf("Number is less than or equal to 5\n");


Found an if statement:
Condition: 0x55555a3d9658
Source Code:
if (num == 10) {
        printf("Number is equal to 10\n");


1 warning generated.

TODO

• ViewIf.cpp : View if block when transforming AST to IR. (test case)
• FindIfBoundaryAction.cpp : find if block boundary when transforming AST to IR. - [x] Find the Boundary. - [x] Save into a .ifi file. (Finding a way not to use file but memory. 🚧)

Q&A

1. fatal error: 'stdio.h' file not found

   Answer