diff options
Diffstat (limited to 'emulator/qtools/check_stack.cpp')
| -rw-r--r-- | emulator/qtools/check_stack.cpp | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/emulator/qtools/check_stack.cpp b/emulator/qtools/check_stack.cpp new file mode 100644 index 0000000..b95890c --- /dev/null +++ b/emulator/qtools/check_stack.cpp @@ -0,0 +1,250 @@ +// Copyright 2009 The Android Open Source Project + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <inttypes.h> +#include <assert.h> +#include "trace_reader.h" +#include "bitvector.h" +#include "parse_options.h" +#include "armdis.h" + +typedef TraceReader<> TraceReaderType; + +#include "parse_options-inl.h" +#include "callstack.h" + +typedef CallStack<StackFrame<symbol_type> > CallStackType; + +void compareStacks(uint64_t time, int pid); +void dumpStacks(int pid); + +static uint64_t debugTime; +static const int kNumStackFrames = 500; +static const int kMaxThreads = (32 * 1024); +CallStackType *eStacks[kMaxThreads]; + +int numErrors; +static const int kMaxErrors = 3; + +struct frame { + uint64_t time; + uint32_t addr; + const char *name; + + frame(uint64_t time, uint32_t addr, const char *name) { + this->time = time; + this->addr = addr; + this->name = name; + } +}; + +class Stack { +public: + static const int kMaxFrames = 1000; + int top; + frame *frames[kMaxFrames]; + + Stack() { + top = 0; + } + + void push(frame *pframe); + frame* pop(); + void dump(); +}; + +void Stack::push(frame *pframe) { + if (top == kMaxFrames) { + fprintf(stderr, "Error: stack overflow\n"); + exit(1); + } + frames[top] = pframe; + top += 1; +} + +frame *Stack::pop() { + if (top <= 0) + return NULL; + top -= 1; + return frames[top]; +} + +Stack *mStacks[kMaxThreads]; + +void Usage(const char *program) +{ + fprintf(stderr, "Usage: %s [options] trace_name elf_file\n", + program); + OptionsUsage(); +} + +int main(int argc, char **argv) +{ + ParseOptions(argc, argv); + if (argc - optind != 2) { + Usage(argv[0]); + exit(1); + } + + char *qemu_trace_file = argv[optind++]; + char *elf_file = argv[optind++]; + + TraceReaderType *etrace = new TraceReaderType; + etrace->Open(qemu_trace_file); + etrace->ReadKernelSymbols(elf_file); + etrace->SetRoot(root); + + TraceReaderType *mtrace = new TraceReaderType; + mtrace->Open(qemu_trace_file); + mtrace->ReadKernelSymbols(elf_file); + mtrace->SetRoot(root); + + BBEvent event; + while (1) { + BBEvent ignored; + symbol_type *function; + MethodRec method_record; + symbol_type *sym; + TraceReaderType::ProcessState *proc; + frame *pframe; + + if (mtrace->ReadMethodSymbol(&method_record, &sym, &proc)) + break; + + if (!IsValidPid(proc->pid)) + continue; + + // Get the stack for the current thread + Stack *mStack = mStacks[proc->pid]; + + // If the stack does not exist, then allocate a new one. + if (mStack == NULL) { + mStack = new Stack(); + mStacks[proc->pid] = mStack; + } + + if (method_record.flags == 0) { + pframe = new frame(method_record.time, method_record.addr, + sym == NULL ? NULL: sym->name); + mStack->push(pframe); + } else { + pframe = mStack->pop(); + delete pframe; + } + + do { + if (GetNextValidEvent(etrace, &event, &ignored, &function)) + break; + if (event.bb_num == 0) + break; + + // Get the stack for the current thread + CallStackType *eStack = eStacks[event.pid]; + + // If the stack does not exist, then allocate a new one. + if (eStack == NULL) { + eStack = new CallStackType(event.pid, kNumStackFrames, etrace); + eStacks[event.pid] = eStack; + } + if (debugTime != 0 && event.time >= debugTime) + printf("time: %llu debug time: %lld\n", event.time, debugTime); + + // Update the stack + eStack->updateStack(&event, function); + } while (event.time < method_record.time); + + compareStacks(event.time, event.pid); + } + + for (int ii = 0; ii < kMaxThreads; ++ii) { + if (eStacks[ii]) + eStacks[ii]->popAll(event.time); + } + + delete etrace; + delete mtrace; + return 0; +} + +void compareStacks(uint64_t time, int pid) { + CallStackType *eStack = eStacks[pid]; + Stack *mStack = mStacks[pid]; + frame *mframe; + + int mTop = mStack->top; + int eTop = eStack->mTop; + CallStackType::frame_type *eFrames = eStack->mFrames; + + // Count the number of Java methods on the native stack + int numMethods = 0; + for (int ii = 0; ii < eTop; ++ii) { + if (eFrames[ii].flags & CallStackType::frame_type::kInterpreted) { + numMethods += 1; + } + } + + // Verify that the number of Java methods on both stacks are the same. + // Allow the native stack to have one less Java method because the + // native stack might be pushing a native function first. + if (mTop != numMethods && mTop != numMethods + 1) { + printf("\nDiff at time %llu pid %d: mtop %d numMethods %d\n", + time, pid, mTop, numMethods); + dumpStacks(pid); + numErrors += 1; + if (numErrors >= kMaxErrors) + exit(1); + } + + // Verify that the Java methods on the method stack are the same + // as the Java methods on the native stack. + int mIndex = 0; + for (int ii = 0; ii < eTop; ++ii) { + // Ignore native functions on the native stack. + if ((eFrames[ii].flags & CallStackType::frame_type::kInterpreted) == 0) + continue; + uint32_t addr = eFrames[ii].function->addr; + addr += eFrames[ii].function->region->vstart; + if (addr != mStack->frames[mIndex]->addr) { + printf("\nDiff at time %llu pid %d: frame %d\n", time, pid, ii); + dumpStacks(pid); + exit(1); + } + mIndex += 1; + } +} + +void dumpStacks(int pid) { + CallStackType *eStack = eStacks[pid]; + Stack *mStack = mStacks[pid]; + frame *mframe; + + int mTop = mStack->top; + printf("\nJava method stack\n"); + for (int ii = 0; ii < mTop; ii++) { + mframe = mStack->frames[ii]; + printf(" %d: %llu 0x%x %s\n", + ii, mframe->time, mframe->addr, + mframe->name == NULL ? "" : mframe->name); + } + + int eTop = eStack->mTop; + CallStackType::frame_type *eFrames = eStack->mFrames; + int mIndex = 0; + printf("\nNative stack\n"); + for (int ii = 0; ii < eTop; ++ii) { + uint32_t addr = eFrames[ii].function->addr; + addr += eFrames[ii].function->region->vstart; + const char *marker = " "; + if (eFrames[ii].flags & CallStackType::frame_type::kInterpreted) { + if (mIndex >= mTop || addr != mStack->frames[mIndex]->addr) { + marker = "*"; + } + mIndex += 1; + } + printf(" %s %d: %d f %d 0x%08x %s\n", + marker, ii, eFrames[ii].time, eFrames[ii].flags, addr, + eFrames[ii].function->name); + } +} |