diff options
Diffstat (limited to 'vm/compiler/codegen/arm/Assemble.c')
| -rw-r--r-- | vm/compiler/codegen/arm/Assemble.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/vm/compiler/codegen/arm/Assemble.c b/vm/compiler/codegen/arm/Assemble.c index 0d7895f23..e642c5c16 100644 --- a/vm/compiler/codegen/arm/Assemble.c +++ b/vm/compiler/codegen/arm/Assemble.c @@ -1105,6 +1105,34 @@ static bool assembleInstructions(CompilationUnit *cUnit, intptr_t startAddr) return false; } +/* Inspect the assembled instruction stream to find potential matches */ +static void matchSignatureBreakpoint(const CompilationUnit *cUnit, + unsigned int size) +{ + unsigned int i, j; + u4 *ptr = (u4 *) cUnit->codeBuffer; + + for (i = 0; i < size - gDvmJit.signatureBreakpointSize + 1; i++) { + if (ptr[i] == gDvmJit.signatureBreakpoint[0]) { + for (j = 1; j < gDvmJit.signatureBreakpointSize; j++) { + if (ptr[i+j] != gDvmJit.signatureBreakpoint[j]) { + break; + } + } + if (j == gDvmJit.signatureBreakpointSize) { + LOGD("Signature match starting from offset %#x (%d words)", + i*4, gDvmJit.signatureBreakpointSize); + int descSize = jitTraceDescriptionSize(cUnit->traceDesc); + JitTraceDescription *newCopy = + (JitTraceDescription *) malloc(descSize); + memcpy(newCopy, cUnit->traceDesc, descSize); + dvmCompilerWorkEnqueue(NULL, kWorkOrderTraceDebug, newCopy); + break; + } + } + } +} + /* * Translation layout in the code cache. Note that the codeAddress pointer * in JitTable will point directly to the code body (field codeAddress). The @@ -1243,6 +1271,13 @@ void dvmCompilerAssembleLIR(CompilationUnit *cUnit, JitTranslationInfo *info) return; } +#if defined(SIGNATURE_BREAKPOINT) + if (info->discardResult == false && gDvmJit.signatureBreakpoint != NULL && + chainCellOffset/4 >= gDvmJit.signatureBreakpointSize) { + matchSignatureBreakpoint(cUnit, chainCellOffset/4); + } +#endif + /* Don't go all the way if the goal is just to get the verbose output */ if (info->discardResult) return; |