mirror of
https://github.com/frida/tinycc
synced 2024-12-27 23:29:40 +03:00
75 lines
2.1 KiB
Plaintext
75 lines
2.1 KiB
Plaintext
|
|
In general, use the same coding style as the surrounding code.
|
|
|
|
However, do not make any unnecessary changes as that complicates
|
|
the VCS (git) history and makes it harder to merge patches. So
|
|
do not modify code just to make it conform to a coding style.
|
|
|
|
Indentation
|
|
|
|
Turn on a "fill tabs with spaces" option in your editor.
|
|
|
|
Remove tabs and trailing spaces from any lines that are modified.
|
|
|
|
Note that some files are indented with 2 spaces (when they
|
|
have large indentation) while most are indented with 4 spaces.
|
|
|
|
Language
|
|
|
|
TCC is mostly implemented in C90. Do not use any non-C90 features
|
|
that are not already in use.
|
|
|
|
Non-C90 features currently in use, as revealed by
|
|
./configure --extra-cflags="-std=c90 -Wpedantic":
|
|
|
|
- long long (including "LL" constants)
|
|
- inline
|
|
- very long string constants
|
|
- assignment between function pointer and 'void *'
|
|
- "//" comments
|
|
- empty macro arguments (DEF_ASMTEST in i386-tok.h)
|
|
- unnamed struct and union fields (in struct Sym), a C11 feature
|
|
|
|
Testing
|
|
|
|
A simple "make test" is sufficient for some simple changes. However,
|
|
before committing a change consider performing some of the following
|
|
additional tests:
|
|
|
|
- Build and run "make test" on several architectures.
|
|
|
|
- Build with ./configure --enable-cross.
|
|
|
|
- If the generation of relocations has been changed, try compiling
|
|
with TCC and linking with GCC/Clang. If the linker has been
|
|
modified, try compiling with GCC/Clang and linking with TCC.
|
|
|
|
- Test with ASan/UBSan to detect memory corruption and undefined behaviour:
|
|
|
|
make clean
|
|
./configure
|
|
make
|
|
make test
|
|
cp libtcc.a libtcc.a.hide
|
|
|
|
make clean
|
|
./configure --extra-cflags="-fsanitize=address,undefined -g"
|
|
make
|
|
cp libtcc.a.hide libtcc.a
|
|
make test
|
|
|
|
(On 64-bit architectures, misaligned access to struct CString is
|
|
expected.)
|
|
|
|
- Test with Valgrind to detect some uses of uninitialised values:
|
|
|
|
make clean
|
|
./configure
|
|
make
|
|
# On Intel, because Valgrind does floating-point arithmetic differently:
|
|
( cd tests && gcc -I.. tcctest.c && valgrind -q ./a.out > test.ref )
|
|
make test TCC="valgrind -q --leak-check=full `pwd`/tcc -B`pwd` -I`pwd`"
|
|
|
|
(Because of how VLAs are implemented, invalid reads are expected
|
|
with 79_vla_continue.)
|