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// Copyright 2011 Google Inc. All Rights Reserved.
#include <stdio.h>
#include "UniquePtr.h"
#include "class_linker.h"
#include "dex_verifier.h"
#include "object.h"
#include "jni.h"
namespace art {
#define REG(method, reg_vector, reg) \
( ((reg) < (method)->NumRegisters()) && \
(( *((reg_vector) + (reg)/8) >> ((reg) % 8) ) & 0x01) )
#define CHECK_REGS(...) do { \
int t[] = {__VA_ARGS__}; \
int t_size = sizeof(t) / sizeof(*t); \
for (int i = 0; i < t_size; ++i) \
CHECK(REG(m, reg_vector, t[i])) << "Error: Reg " << i << " is not in RegisterMap"; \
} while(false)
static int gJava_StackWalk_refmap_calls = 0;
struct ReferenceMapVisitor : public Thread::StackVisitor {
ReferenceMapVisitor() {
}
void VisitFrame(const Frame& frame, uintptr_t pc) {
Method* m = frame.GetMethod();
if (!m ||m->IsNative()) {
return;
}
LOG(INFO) << "At " << PrettyMethod(m, false);
art::DexVerifier::RegisterMap* map = new art::DexVerifier::RegisterMap(
m->GetRegisterMapHeader(),
m->GetRegisterMapData());
if (!pc) {
// pc == NULL: m is either a native method or a phony method
return;
}
if (m->IsCalleeSaveMethod()) {
LOG(WARNING) << "no PC for " << PrettyMethod(m);
return;
}
const uint8_t* reg_vector = art::DexVerifier::RegisterMapGetLine(map, m->ToDexPC(pc));
std::string m_name = m->GetName()->ToModifiedUtf8();
// Given the method name and the number of times the method has been called,
// we know the Dex registers with live reference values. Assert that what we
// find is what is expected.
if (m_name.compare("f") == 0) {
if (gJava_StackWalk_refmap_calls == 1) {
CHECK_EQ(1U, m->ToDexPC(pc));
CHECK_REGS(1);
} else {
CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
CHECK_EQ(5U, m->ToDexPC(pc));
CHECK_REGS(1);
}
} else if (m_name.compare("g") == 0) {
if (gJava_StackWalk_refmap_calls == 1) {
CHECK_EQ(0xcU, m->ToDexPC(pc));
CHECK_REGS(0, 2); // Note that v1 is not in the minimal root set
} else {
CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
CHECK_EQ(0xcU, m->ToDexPC(pc));
CHECK_REGS(0, 2);
}
} else if (m_name.compare("shlemiel") == 0) {
if (gJava_StackWalk_refmap_calls == 1) {
CHECK_EQ(0x380U, m->ToDexPC(pc));
CHECK_REGS(2, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 25);
} else {
CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
CHECK_EQ(0x380U, m->ToDexPC(pc));
CHECK_REGS(2, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 25);
}
}
LOG(INFO) << reg_vector;
}
};
extern "C"
JNIEXPORT jint JNICALL Java_StackWalk_refmap(JNIEnv* env, jobject thisObj, jint count) {
CHECK_EQ(count, 0);
gJava_StackWalk_refmap_calls++;
// Visitor
ReferenceMapVisitor mapper;
Thread::Current()->WalkStack(&mapper);
return count + 1;
}
extern "C"
JNIEXPORT jint JNICALL Java_StackWalk2_refmap2(JNIEnv* env, jobject thisObj, jint count) {
gJava_StackWalk_refmap_calls++;
// Visitor
ReferenceMapVisitor mapper;
Thread::Current()->WalkStack(&mapper);
return count + 1;
}
}
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