Commit Graph

4 Commits

Author SHA1 Message Date
Simon Pilgrim 84d5768d97 MemProfiler::insertDynamicShadowAtFunctionEntry - use cast<> instead of dyn_cast<> for dereferenced pointer. NFCI.
We're immediately dereferencing the casted pointer, so use cast<> which will assert instead of dyn_cast<> which can return null.

Fixes static analyzer warning.
2021-01-05 09:34:01 +00:00
Fangrui Song 204d0d51b3 [MemProf] Make __memprof_shadow_memory_dynamic_address dso_local in static relocation model
The x86-64 backend currently has a bug which uses a wrong register when for the GOTPCREL reference.
The program will crash without the dso_local specifier.
2020-12-05 21:36:31 -08:00
Teresa Johnson 0949f96dc6 [MemProf] Pass down memory profile name with optional path from clang
Similar to -fprofile-generate=, add -fmemory-profile= which takes a
directory path. This is passed down to LLVM via a new module flag
metadata. LLVM in turn provides this name to the runtime via the new
__memprof_profile_filename variable.

Additionally, always pass a default filename (in $cwd if a directory
name is not specified vi the = form of the option). This is also
consistent with the behavior of the PGO instrumentation. Since the
memory profiles will generally be fairly large, it doesn't make sense to
dump them to stderr. Also, importantly, the memory profiles will
eventually be dumped in a compact binary format, which is another reason
why it does not make sense to send these to stderr by default.

Change the existing memprof tests to specify log_path=stderr when that
was being relied on.

Depends on D89086.

Differential Revision: https://reviews.llvm.org/D89087
2020-11-01 17:38:23 -08:00
Teresa Johnson 226d80ebe2 [MemProf] Rename HeapProfiler to MemProfiler for consistency
This is consistent with the clang option added in
7ed8124d46, and the comments on the
runtime patch in D87120.

Differential Revision: https://reviews.llvm.org/D87622
2020-09-14 13:14:57 -07:00