busybox-w32/libbb/const_hack.c, branch cron_changesA mirror of https://github.com/rmyorston/busybox-w32.git
https://git.lua4.win/busybox-w32/atom?h=cron_changes2025-07-01T19:21:16+00:00libbb: Prevent clang from reading the G pointer before it is assigned2025-07-01T19:21:16+00:00Bin Mengbmeng.cn@gmail.com2025-06-01T04:26:06+00:00urn:sha1:244f5c47954010d45b7bf19dc4c7c9c041bf6807
It was observed that getty crashes on RISC-V 64-bit target, with the
busybox binary compiled by clang/LLVM 17 with -O2. Not only getty,
but also some other applets like syslogd/vi are broken too.
Commit 5156b245 ("Make const ptr assign as function call in clang")
introduced XZALLOC_CONST_PTR() to defeat the compiler optimization,
however it only fixed a small number of broken places when compiling
busybox with clang/LLVM. A large number of places remain broken.
This commit treats ASSIGN_CONST_PTR() the same way as XZALLOC_CONST_PTR().
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Make const ptr assign as function call in clang2021-10-09T20:30:45+00:00YU Jinchengshana@zju.edu.cn2021-10-09T18:19:51+00:00urn:sha1:5156b245536ce0f07165793f07c63fd9fa5dd3b7
- This can act as memory barrier in clang to avoid
read before assign of a const ptr
Signed-off-by: LoveSy <shana@zju.edu.cn>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>