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| author | Andrew Haley <aph@redhat.com> | 2004-10-14 15:21:13 +0000 |
|---|---|---|
| committer | Andrew Haley <aph@gcc.gnu.org> | 2004-10-14 15:21:13 +0000 |
| commit | 180a373d0d5d4534d7393b1ad5537d9f9ab7e79e (patch) | |
| tree | f9e1b10a90a60b5918f10b2519f9520b57f64915 /libjava/gnu/gcj/runtime/natStackTrace.cc | |
| parent | b79187bb541c3d842f2a3aee554b4b3f2e63f804 (diff) | |
| download | gcc-180a373d0d5d4534d7393b1ad5537d9f9ab7e79e.zip gcc-180a373d0d5d4534d7393b1ad5537d9f9ab7e79e.tar.gz gcc-180a373d0d5d4534d7393b1ad5537d9f9ab7e79e.tar.bz2 | |
interpret.cc (_Jv_InterpMethod::run): Initialize _Jv_StartOfInterpreter.
2004-10-13 Andrew Haley <aph@redhat.com>
* interpret.cc (_Jv_InterpMethod::run): Initialize
_Jv_StartOfInterpreter.
(_Jv_StartOfInterpreter, _Jv_EndOfInterpreter): Functions removed.
(_Jv_StartOfInterpreter, _Jv_EndOfInterpreter): New variables.
* gnu/gcj/runtime/natStackTrace.cc (fillInStackTrace): Use
_Unwind_FindEnclosingFunction to discover whether PC is within the
interpreter.
From-SVN: r89037
Diffstat (limited to 'libjava/gnu/gcj/runtime/natStackTrace.cc')
| -rw-r--r-- | libjava/gnu/gcj/runtime/natStackTrace.cc | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/libjava/gnu/gcj/runtime/natStackTrace.cc b/libjava/gnu/gcj/runtime/natStackTrace.cc index 5e5aed8..fbe403a 100644 --- a/libjava/gnu/gcj/runtime/natStackTrace.cc +++ b/libjava/gnu/gcj/runtime/natStackTrace.cc @@ -45,6 +45,11 @@ details. */ #include <unwind.h> +#ifdef INTERPRETER +extern "C" void *_Unwind_FindEnclosingFunction (void *pc) + __attribute__((pure)); +#endif // INTERPRETER + // Fill in this stack trace with MAXLEN elements starting at offset. void gnu::gcj::runtime::StackTrace::fillInStackTrace (jint maxlen, jint offset) @@ -58,9 +63,9 @@ gnu::gcj::runtime::StackTrace::fillInStackTrace (jint maxlen, jint offset) if (len > 0) { #ifdef INTERPRETER - extern void _Jv_StartOfInterpreter (void); - extern void _Jv_EndOfInterpreter (void); - + extern void *const _Jv_StartOfInterpreter; + extern void * _Jv_EndOfInterpreter; + java::lang::Thread *thread = java::lang::Thread::currentThread(); _Jv_MethodChain *interp_frame = (thread ? reinterpret_cast<_Jv_MethodChain *> (thread->interp_frame) @@ -70,16 +75,41 @@ gnu::gcj::runtime::StackTrace::fillInStackTrace (jint maxlen, jint offset) frame = (_Jv_frame_info *) _Jv_Malloc (len * sizeof (_Jv_frame_info)); for (int n = 0; n < len; n++) { - frame[n].addr = p[n]; + void *pc = p[n]; + frame[n].addr = pc; + #ifdef INTERPRETER - if (p[n] >= &_Jv_StartOfInterpreter && p[n] <= &_Jv_EndOfInterpreter) + frame[n].interp = 0; + + // If _Jv_StartOfInterpreter is NULL either we've never + // entered the intepreter or _Unwind_FindEnclosingFunction + // is broken. + if (__builtin_expect (_Jv_StartOfInterpreter != NULL, false)) { - frame[n].interp = (void *) interp_frame->self; - interp_frame = interp_frame->next; + // _Jv_StartOfInterpreter marks the very first + // instruction in the interpreter, but + // _Jv_EndOfInterpreter is an upper bound. If PC is + // less than _Jv_EndOfInterpreter it might be in the + // interpreter: we call _Unwind_FindEnclosingFunction to + // find out. + if ((_Jv_EndOfInterpreter == NULL || pc < _Jv_EndOfInterpreter) + && (_Unwind_FindEnclosingFunction (pc) + == _Jv_StartOfInterpreter)) + { + frame[n].interp = (void *) interp_frame->self; + interp_frame = interp_frame->next; + } + else + { + // We've found an address that we know is not within + // the interpreter. We use that to refine our upper + // bound on where the interpreter ends. + if (_Jv_EndOfInterpreter == NULL || pc < _Jv_EndOfInterpreter) + _Jv_EndOfInterpreter = pc; + } } - else - frame[n].interp = 0; #endif // INTERPRETER + } } else |