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Re: [Tinycc-devel] bounds checking

From: Christian Jullien
Subject: Re: [Tinycc-devel] bounds checking
Date: Tue, 10 Dec 2019 08:35:21 +0100

Hello Herman,

=== Compiling with your patch on ARM (32bit) gives this error:
------------ test3 ------------
../tcc -B.. -I../include -I.. -I.. -DCONFIG_TRIPLET="\"arm-linux-gnueabihf\"" 
-DTCC_ARM_VFP -run ../tcc.c -B.. -I../include -I.. -I.. 
-I../include -I.. -I.. -DCONFIG_TRIPLET="\"arm-linux-gnueabihf\"" 
-DTCC_ARM_VFP -run ../tcc.c -B.. -I../include -I.. -I.. -run tcctest.c > 
--- test.ref    2019-12-10 08:31:02.487022330 +0100
+++ test.out3   2019-12-10 08:31:03.257006236 +0100
@@ -749,4 +749,4 @@
 attr: 7 7
 attr: 16 16
make[2]: *** [Makefile:106: test3] Error 1

=== Compiling with your patch on Aarch64 (AMR64) gives this error:
make[1]: Entering directory '/home/jullien/tinycc/lib'
../tcc -c lib-arm64.c -o lib-arm64.o -B.. -g -Wno-deprecated-declarations
../tcc -c dsohandle.c -o dsohandle.o -B.. -g -Wno-deprecated-declarations
../tcc -ar rcs ../libtcc1.a lib-arm64.o dsohandle.o
../tcc -ar rcs ../libtccb1.a
usage: tcc -ar [rcsv] lib file...
create library ([abdioptxN] not supported).
make[1]: *** [Makefile:90: ../libtccb1.a] Error 1
make[1]: Leaving directory '/home/jullien/tinycc/lib'
make: *** [Makefile:246: libtcc1.a] Error 2

-----Original Message-----
From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=address@hidden] On 
Behalf Of Herman ten Brugge via Tinycc-devel
Sent: Tuesday, December 10, 2019 08:26
To: Herman ten Brugge via Tinycc-devel
Cc: Herman ten Brugge
Subject: [Tinycc-devel] bounds checking

I just committed a large patch that fix a lot of bounds checking problems.

I tested the bounds checking code now works on x86_64 and i386 on linux 
and windows.
The test/tests2 directory can now be tested with -b enabled.

There are a lot of changes (not complete):
- split up bcheck.c from libtcc1.a because I now use dl_sym to redirect 
malloc and friends.
   This was needed because the malloc_hooks are not thread safe.
   When compiling with -b now the pthread and dl library are also included.
- Rewrote bcheck.c library to fix a lot of small problems.
- Add mmap/munmap support on linux.
- Updated tcc.1
- Added bound_main_arg to record argv on startup.
- Added support for x86_64 on windows.
- Moved tcc_add_bcheck from tccelf to i386/x86_64 code.
- Added 2 new testcases.
- Fixed a lot of bugs:
   - conversion problem code with double/long long.
   - in gen_bounded_ptr_add move save_regs to top.
   - alloca/vla fixes.
   - VT_LLOCAL problems when using bounds checking.
   - ...



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