[3.13] gh-144194: Fix mmap failure check in perf_jit_trampoline.c (#143713) #144304
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…hon#143713) mmap() returns MAP_FAILED ((void*)-1) on error, not NULL. The current check never detects mmap failures, so jitdump initialization proceeds even when the memory mapping fails. (cherry picked from commit 8fe8a94)
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mmap() returns MAP_FAILED ((void*)-1) on error, not NULL. The current check never detects mmap failures, so jitdump initialization proceeds even when the memory mapping fails.
(cherry picked from commit 8fe8a94)