[Valgrind-developers] [valgrind] memcheck/tests/sh-mem-random.c: Set huge_addr to 240GB

[Mark W. <ma...@so...>]

https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=738af55f1b12a06f76943ca4afb9ba9ec3603ea5

commit 738af55f1b12a06f76943ca4afb9ba9ec3603ea5
Author: Mark Wielaard <ma...@kl...>
Date:   Tue Dec 24 19:11:17 2024 +0100

    memcheck/tests/sh-mem-random.c: Set huge_addr to 240GB
    
    https://www.kernel.org/doc/html/next/riscv/vm-layout.html
    Says RISC-V Linux Kernel SV39 user-space virtual memory ends at 256GB.
    So try at 240GB. This seems a reasonable value for other arches too.
    
    https://bugs.kde.org/show_bug.cgi?id=468575#c78

Diff:
---
 memcheck/tests/sh-mem-random.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/memcheck/tests/sh-mem-random.c b/memcheck/tests/sh-mem-random.c
index ae82248ae6..0e01684acb 100644
--- a/memcheck/tests/sh-mem-random.c
+++ b/memcheck/tests/sh-mem-random.c
@@ -247,7 +247,10 @@ int main(void)
       int nbytes_p;
       // (U1*)(UWord)constULL funny casting to keep gcc quiet on
       // 32-bit platforms
-      U1* huge_addr = (U1*)(UWord)0x6600000000ULL;  // 408GB
+      // https://www.kernel.org/doc/html/next/riscv/vm-layout.html
+      // Says RISC-V Linux Kernel SV39 user-space virtual memory
+      // ends at 256GB. So try at 240GB.
+      U1* huge_addr = (U1*)(UWord)0x3c00000000ULL;  // 240GB
       // Note, kernel 2.6.? on Athlon64 refuses fixed mmap requests
       // at above 512GB.