Hi, I'm getting a strange error when running Valgrind. --23266-- WARNING: Serious error when reading debug info --23266-- When reading debug info from /tmp/db/test.txt: --23266-- can't read file to inspect ELF header
Note that the file in question is a data file, which I'm mmaping I can reproduce this using the following code: https://gist.github.com/ayende/d65a7a3c06556d62c8fa0f88b04ea449 valgrind-3.16.1 & clang version 10.0.0-4ubuntu1 This seems to be related to mmaping a file, but I can't figure out exactly why Running Valgrind under `strace` gives: mmap(0x4e4d000, 65536, PROT_READ, MAP_SHARED|MAP_FIXED, 3, 0) = 0x4e4d000 statx(3, "", AT_STATX_SYNC_AS_STAT|AT_EMPTY_PATH, STATX_ALL, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0600, stx_size=262144, ...}) = 0 readlink("/proc/self/fd/3", "/tmp/db/test.txt", 4096) = 16 statx(AT_FDCWD, "/tmp/db/test.txt", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0600, stx_size=262144, ...}) = 0 pread64(3, 0x10032c68a0, 1024, 0) = -1 EINVAL (Invalid argument) getpid() = 23260 write(1027, "--23260-- WARNING: Serious error"..., 57--23260-- WARNING: Serious error when reading debug info ) = 57 getpid() = 23260 write(1027, "--23260-- When reading debug inf"..., 57--23260-- When reading debug info from /tmp/db/test.txt: So it looks like the `pread64()` code is failing, but I can't figure out why that is the case, or why it would cause Valgrind to give this error. Any ideas?
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