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| author | Matthew Malcomson <matthew.malcomson@arm.com> | 2020-11-25 16:31:35 +0000 |
|---|---|---|
| committer | Matthew Malcomson <matthew.malcomson@arm.com> | 2020-11-25 16:35:31 +0000 |
| commit | 8eb12742e8ae5a16e05be627c701234dc7c13504 (patch) | |
| tree | 790322638eedb4a867dc18779c490330d982d0fd /gcc/cppbuiltin.c | |
| parent | 1ee3d1ef105c5181fbf298b8ddb638f8e3cbaaca (diff) | |
| download | gcc-8eb12742e8ae5a16e05be627c701234dc7c13504.zip gcc-8eb12742e8ae5a16e05be627c701234dc7c13504.tar.gz gcc-8eb12742e8ae5a16e05be627c701234dc7c13504.tar.bz2 | |
libsanitizer: Hwasan reporting check for dladdr failing
In `GetGlobalSizeFromDescriptor` we use `dladdr` to get info on the the
current address. `dladdr` returns 0 if it failed.
During testing on Linux this returned 0 to indicate failure, and
populated the `info` structure with a NULL pointer which was
dereferenced later.
This patch checks for `dladdr` returning 0, and in that case returns 0
from `GetGlobalSizeFromDescriptor` to indicate failure of identifying
the address.
This occurs when `GetModuleNameAndOffsetForPC` succeeds for some address
not in a dynamically loaded library. One example is when the found
"module" is '[stack]' having come from parsing /proc/self/maps.
Cherry-pick from 83ac18205ec69a00ac2be3b603bc3a61293fbe89.
Differential Revision: https://reviews.llvm.org/D91344
Diffstat (limited to 'gcc/cppbuiltin.c')
0 files changed, 0 insertions, 0 deletions