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[msan] Change personality CHECK to Printf() + Die() #160626

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Sep 25, 2025
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[msan] Change personality CHECK to Printf() + Die() #160626

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10 changes: 9 additions & 1 deletion compiler-rt/lib/msan/msan_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -190,7 +190,15 @@ bool InitShadowWithReExec(bool init_origins) {
"possibly due to high-entropy ASLR.\n"
"Re-execing with fixed virtual address space.\n"
"N.B. reducing ASLR entropy is preferable.\n");
CHECK_NE(personality(old_personality | ADDR_NO_RANDOMIZE), -1);

if (personality(old_personality | ADDR_NO_RANDOMIZE) == -1) {
Printf(
"FATAL: MemorySanitizer: unable to disable ASLR (perhaps "
"sandboxing is enabled?).\n");
Printf("FATAL: Please rerun without sandboxing and/or ASLR.\n");
Die();
}

ReExec();
}
# endif
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