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| author | Ankur Saini <arsenic@sourceware.org> | 2021-08-25 12:33:06 +0530 |
|---|---|---|
| committer | Ankur Saini <arsenic@sourceware.org> | 2021-08-25 19:00:36 +0530 |
| commit | 43a5d46feabd93ba78983919234f05f5fc9a0982 (patch) | |
| tree | 659d0870362edab401f70d8ed5a93ad21d591577 | |
| parent | 29c77454e5ab33ce06a741eacdfbd5348fbccc95 (diff) | |
| download | gcc-43a5d46feabd93ba78983919234f05f5fc9a0982.zip gcc-43a5d46feabd93ba78983919234f05f5fc9a0982.tar.gz gcc-43a5d46feabd93ba78983919234f05f5fc9a0982.tar.bz2 | |
analyzer: Impose recursion limit on indirect calls.
2021-08-25 Ankur Saini <arsenic@sourceware.org>
gcc/analyzer/ChangeLog:
PR analyzer/101980
* engine.cc (exploded_graph::maybe_create_dynamic_call): Don't create
calls if max recursion limit is reached.
| -rw-r--r-- | gcc/analyzer/engine.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/analyzer/engine.cc b/gcc/analyzer/engine.cc index 4ee9279..9c604d1 100644 --- a/gcc/analyzer/engine.cc +++ b/gcc/analyzer/engine.cc @@ -3059,6 +3059,20 @@ exploded_graph::maybe_create_dynamic_call (const gcall *call, new_point.push_to_call_stack (sn_exit, next_point.get_supernode()); + + /* Impose a maximum recursion depth and don't analyze paths + that exceed it further. + This is something of a blunt workaround, but it only + applies to recursion (and mutual recursion), not to + general call stacks. */ + if (new_point.get_call_string ().calc_recursion_depth () + > param_analyzer_max_recursion_depth) + { + if (logger) + logger->log ("rejecting call edge: recursion limit exceeded"); + return false; + } + next_state.push_call (*this, node, call, uncertainty); if (next_state.m_valid) |