Fail to run benchmark programs on Arm64/Linux

[jserv]

When I ran some standard benchmark programs on Ubuntu Linux (Arm64), several of them crashed with segmentation faults. Execution mode is interpreter.

Tested on

• Ampere eMAG 8180 + Ubuntu Linux 24.04
• Apple Silicon M1 + Ubuntu Linux 22.04

Known failure programs: (prebuilt ELF in directory build/riscv32/)

• qsort
• primes
• norx
• stream
• aes
• miniz

[RinHizakura]

Hi @jserv, I found these segmentation faults also happen on x86_64 platform. There could be some regression.

[RinHizakura]

The change feca1de can cause it. @jserv, have you tried building with -DMEM_SIZE=0xFFFFFFFFULL for a larger memory size? I wonder if I am checking the same issue with you. After increasing the MEM_SIZE, these tests can be run on my ARM64 platform(Jetson AGX Orin Developer Kit).

[vacantron]

The reason is the reserved memory chunk via mmap() is too small that makes function malloc() access the out-of-bound address in these tests. If we modify

rv32emu/src/main.c

Line 178 in 576f30a

#define MEM_SIZE 0x80000ULL

to 0x8000000UL or larger value could fix this error.

[jserv]

If we modify

rv32emu/src/main.c

Line 178 in 576f30a

#define MEM_SIZE 0x80000ULL

to 0x8000000UL or larger value could fix this error.

Le's implement a temporary solution to support executing pre-compiled ELF executable files that aren't SDL-based, with more flexible memory constraint requirements. Later, we should move forward to effective memory management.

[vacantron]

After the investigation, SDL-based, riscv-arch-test, and some executables in build/riscv32 need the ENABLE_FULL4G option enabled. I'll add some notice for them.