diff options
Diffstat (limited to 'tests/backtrace.c')
| -rw-r--r-- | tests/backtrace.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tests/backtrace.c b/tests/backtrace.c index 1ff6353c..21abe8af 100644 --- a/tests/backtrace.c +++ b/tests/backtrace.c @@ -90,6 +90,10 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc, return; } Dwfl_Module *mod; + /* See case 4. Special case to help out simple frame pointer unwinders. */ + static bool duplicate_sigusr2 = false; + if (duplicate_sigusr2) + frameno--; static bool reduce_frameno = false; if (reduce_frameno) frameno--; @@ -125,6 +129,14 @@ callback_verify (pid_t tid, unsigned frameno, Dwarf_Addr pc, } /* FALLTHRU */ case 4: + /* Some simple frame unwinders get this wrong and think sigusr2 + is calling itself again. Allow it and just pretend there is + an extra sigusr2 frame. */ + if (symname != NULL && strcmp (symname, "sigusr2") == 0) + { + duplicate_sigusr2 = true; + break; + } assert (symname != NULL && strcmp (symname, "stdarg") == 0); break; case 5: |