ArtPI/src/native/pi_native.cpp at master · CKAndroidProject/ArtPI · GitHub

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// pi_native.cpp - Runtime Native ARM64 Disassembler, Symbol Resolver & CFG Flow

#include "pi_native.h"

#include "art/art_method.h"

#include "xdl.h"

#include "frida-gum.h"

#include "pine_native.h"

#include <link.h>

#include <dlfcn.h>

#include <cstring>

#include <sstream>

#include <iomanip>

#include <mutex>

#include <cxxabi.h>

#include <map>

#include <algorithm>

#include <vector>

namespace PI {

namespace {

static bool IsDlsymLookupStub(void* entry) {

static void* stub = []() -> void* {

void* h = xdl_open("libart.so", XDL_DEFAULT);

if (!h) return nullptr;

void* s = xdl_sym(h, "art_jni_dlsym_lookup_stub", nullptr);

if (!s) s = xdl_sym(h, "art_jni_dlsym_lookup_stub_jit", nullptr);

xdl_close(h);

return s;

}();

return stub != nullptr && entry == stub;

}

} // namespace

bool isDlsymLookupStub(void* entry) {

return IsDlsymLookupStub(entry);

}

namespace {

static std::string PrettyAccessFlags(uint32_t flags) {

std::string s;

if (flags & 0x0001) s += "public ";

if (flags & 0x0002) s += "private ";

if (flags & 0x0004) s += "protected ";

if (flags & 0x0008) s += "static ";

if (flags & 0x0010) s += "final ";

if (flags & 0x0020) s += "synchronized ";

if (flags & 0x0100) s += "native ";

if (flags & 0x0400) s += "abstract ";

if (flags & 0x1000) s += "synthetic ";

if (!s.empty() && s.back() == ' ') s.pop_back();

return s;

}

typedef std::string (*PrettyMethodFn)(void* insn, bool with_sig);

static PrettyMethodFn g_pretty_method_fn = nullptr;

static bool g_symbols_initialized = false;

static void EnsureSymbolsInitialized() {

if (g_symbols_initialized) return;

g_symbols_initialized = true;

void* art_h = xdl_open("libart.so", XDL_DEFAULT);

if (!art_h) art_h = xdl_open("libart.so", XDL_TRY_FORCE_LOAD);

if (art_h) {

g_pretty_method_fn = reinterpret_cast<PrettyMethodFn>(

xdl_sym(art_h, "_ZN3art9ArtMethod12PrettyMethodEb", nullptr));

if (!g_pretty_method_fn) {

g_pretty_method_fn = reinterpret_cast<PrettyMethodFn>(

xdl_dsym(art_h, "_ZN3art9ArtMethod12PrettyMethodEb", nullptr));

}

xdl_close(art_h);

}

static std::string GetMethodFullName(ArtMethod* method, uint32_t flags) {

EnsureSymbolsInitialized();

std::string sig;

if (g_pretty_method_fn && method) {

sig = g_pretty_method_fn(method, true);

}

std::string prefix = PrettyAccessFlags(flags);

if (!prefix.empty()) {

if (!sig.empty()) {

return prefix + " " + sig;

}

return prefix;

}

return sig.empty() ? "(native method)" : sig;

}

struct NativeInsn {

uint64_t addr = 0;

uint8_t bytes[4] = {0};

std::string mnemonic;

std::string op_str;

bool is_branch = false;

bool is_call = false;

uintptr_t target_addr = 0;

};

static std::string Demangle(const char* mangled) {

if (!mangled || !*mangled) return "";

int status = 0;

char* demangled = abi::__cxa_demangle(mangled, nullptr, nullptr, &status);

if (status == 0 && demangled) {

std::string res(demangled);

free(demangled);

return res;

}

return mangled;

}

static std::string ResolveSymbol(uintptr_t addr, void** xdl_cache, uintptr_t func_start, uintptr_t func_end) {

if (addr < 0x1000) return "";

// 1. Resolve via xDL

xdl_info_t info{};

xdl_addr(reinterpret_cast<void*>(addr), &info, xdl_cache);

std::string mod_name;

if (info.dli_fname) {

const char* slash = strrchr(info.dli_fname, '/');

mod_name = slash ? (slash + 1) : info.dli_fname;

}

std::string sym_name;

uintptr_t sym_base = reinterpret_cast<uintptr_t>(info.dli_saddr);

if (info.dli_sname && *info.dli_sname) {

sym_name = info.dli_sname;

}

// 2. Fallback: libc dladdr

if (sym_name.empty()) {

Dl_info dlinfo{};

if (dladdr(reinterpret_cast<void*>(addr), &dlinfo)) {

if (dlinfo.dli_sname && *dlinfo.dli_sname) {

sym_name = dlinfo.dli_sname;

if (!sym_base) sym_base = reinterpret_cast<uintptr_t>(dlinfo.dli_saddr);

}

if (mod_name.empty() && dlinfo.dli_fname) {

const char* slash = strrchr(dlinfo.dli_fname, '/');

mod_name = slash ? (slash + 1) : dlinfo.dli_fname;

}

if (!sym_name.empty()) {

sym_name = Demangle(sym_name.c_str());

std::ostringstream ss;

ss << "; <";

if (!mod_name.empty()) {

ss << mod_name << "!" << sym_name;

if (sym_base > 0 && addr > sym_base) {

ss << "+0x" << std::hex << (addr - sym_base) << std::dec;

}

} else {

ss << sym_name;

if (sym_base > 0 && addr > sym_base) {

ss << "+0x" << std::hex << (addr - sym_base) << std::dec;

}

ss << ">";

return ss.str();

}

// 3. If no symbol found and target is within current function, show intra-function loc offset

if (func_start > 0 && func_end > func_start && addr >= func_start && addr < func_end) {

char buf[64];

snprintf(buf, sizeof(buf), "; <loc_0x%llx (+0x%x)>",

static_cast<unsigned long long>(addr),

static_cast<unsigned int>(addr - func_start));

return buf;

}

// 4. Module base relative offset

if (!mod_name.empty() && info.dli_fbase) {

uintptr_t fbase = reinterpret_cast<uintptr_t>(info.dli_fbase);

std::ostringstream ss;

ss << "; <" << mod_name << "+0x" << std::hex << (addr - fbase) << std::dec << ">";

return ss.str();

}

return "";

}

struct NativeWindowState {

uintptr_t func_start = 0;

size_t win_begin = 0;

};

static thread_local NativeWindowState t_nativeWinState;

} // namespace

std::string getPrettyMethodSignature(ArtMethod* method) {

if (!method) return "";

EnsureSymbolsInitialized();

if (!g_pretty_method_fn) return "";

return g_pretty_method_fn(method, true);

}

std::string dumpNative(const void* native_pc, int max_instructions, ArtMethod* method, uintptr_t highlight_pc) {

uintptr_t pc = reinterpret_cast<uintptr_t>(native_pc);

if (pc < 0x1000) {

return "[PI Native] Error: Native code pointer is null or invalid (below 0x1000)\n";

}

if (highlight_pc < 0x1000) highlight_pc = 0;

EnsureSymbolsInitialized();

// 1. Resolve shared object & symbol via xdl_addr (current PC, so callees refresh)

xdl_info_t info{};

void* cache = nullptr;

xdl_addr(const_cast<void*>(native_pc), &info, &cache);

const char* so_name = info.dli_fname ? info.dli_fname : "unknown";

uintptr_t fbase = reinterpret_cast<uintptr_t>(info.dli_fbase);

uintptr_t rel_offset = (fbase > 0 && pc >= fbase) ? (pc - fbase) : 0;

const char* sym_name = (info.dli_sname && *info.dli_sname) ? info.dli_sname : "";

uintptr_t sym_addr = reinterpret_cast<uintptr_t>(info.dli_saddr);

size_t sym_size = info.dli_ssize;

uintptr_t func_start = pc;

if (sym_addr != 0 && pc >= sym_addr) {

bool in_sym = (sym_size > 0)

? (pc < sym_addr + sym_size)

: ((pc - sym_addr) < 0x10000);

if (in_sym) func_start = sym_addr;

}

size_t known_size = (sym_size > 0 && sym_size < 0x80000) ? sym_size : 0;

const bool windowed = highlight_pc >= 0x1000;

const int listing_window = windowed

? ((max_instructions > 0) ? max_instructions : 21)

: ((max_instructions > 0) ? max_instructions : 256);

// 3. Initialize Capstone ARM64 disassembler & Frida-Gum

static std::once_flag s_cs_init_flag;

std::call_once(s_cs_init_flag, []() {

cs_arch_register_arm64();

gum_init_embedded();

});

csh cs_handle = 0;

cs_err err = cs_open(CS_ARCH_ARM64, CS_MODE_ARM, &cs_handle);

if (err != CS_ERR_OK) {

xdl_addr_clean(&cache);

char errBuf[128];

snprintf(errBuf, sizeof(errBuf), "[PI Native] Error: Failed to initialize ARM64 disassembler engine: %s (code %d)\n", cs_strerror(err), (int)err);

return errBuf;

}

cs_option(cs_handle, CS_OPT_DETAIL, CS_OPT_ON);

int max_limit = listing_window;

uintptr_t dump_start = func_start;

if (windowed) {

uintptr_t center = (highlight_pc >= 0x1000) ? highlight_pc : pc;

uintptr_t before = static_cast<uintptr_t>(listing_window / 2) * 4u;

dump_start = (center > before) ? (center - before) : 0;

dump_start &= ~3ull;

if (center >= func_start && dump_start < func_start) {

dump_start = func_start;

}

max_limit = listing_window + 4;

}

std::vector<NativeInsn> insns_list;

uintptr_t cur_pc = dump_start;

uintptr_t max_forward_target = dump_start;

while (insns_list.size() < static_cast<size_t>(max_limit)) {

const uint8_t* code_bytes = reinterpret_cast<const uint8_t*>(cur_pc);

cs_insn* insn = nullptr;

size_t count = cs_disasm(cs_handle, code_bytes, 4, cur_pc, 1, &insn);

if (count == 0 || !insn) {

break;

}

NativeInsn item;

item.addr = cur_pc;

std::memcpy(item.bytes, insn->bytes, 4);

item.mnemonic = insn->mnemonic;

item.op_str = insn->op_str;

if (insn->detail) {

auto& arm64 = insn->detail->arm64;

switch (insn->id) {

case ARM64_INS_B:

case ARM64_INS_BC:

if (arm64.op_count >= 1 && arm64.operands[0].type == ARM64_OP_IMM) {

item.target_addr = static_cast<uintptr_t>(arm64.operands[0].imm);

item.is_branch = true;

}

break;

case ARM64_INS_CBZ:

case ARM64_INS_CBNZ:

if (arm64.op_count >= 2 && arm64.operands[1].type == ARM64_OP_IMM) {

item.target_addr = static_cast<uintptr_t>(arm64.operands[1].imm);

item.is_branch = true;

}

break;

case ARM64_INS_TBZ:

case ARM64_INS_TBNZ:

if (arm64.op_count >= 3 && arm64.operands[2].type == ARM64_OP_IMM) {

item.target_addr = static_cast<uintptr_t>(arm64.operands[2].imm);

item.is_branch = true;

}

break;

case ARM64_INS_BL:

if (arm64.op_count >= 1 && arm64.operands[0].type == ARM64_OP_IMM) {

item.target_addr = static_cast<uintptr_t>(arm64.operands[0].imm);

item.is_call = true;

}

break;

case ARM64_INS_ADR:

case ARM64_INS_ADRP:

case ARM64_INS_LDR:

case ARM64_INS_LDRSW:

if (arm64.op_count >= 2 && arm64.operands[1].type == ARM64_OP_IMM) {

item.target_addr = static_cast<uintptr_t>(arm64.operands[1].imm);

}

break;

default:

break;

}

insns_list.push_back(item);

if (item.is_branch && item.target_addr > cur_pc &&

item.target_addr < static_cast<uintptr_t>(func_start + 0x20000)) {

if (item.target_addr > max_forward_target) {

max_forward_target = item.target_addr;

}

bool is_ret = (insn->id == ARM64_INS_RET);

bool is_tail_branch = (insn->id == ARM64_INS_B && insn->detail &&

insn->detail->arm64.op_count == 1 &&

insn->detail->arm64.operands[0].type == ARM64_OP_IMM &&

(insn->detail->arm64.operands[0].imm < static_cast<int64_t>(func_start) ||

insn->detail->arm64.operands[0].imm > static_cast<int64_t>(func_start + 0x10000)));

cs_free(insn, count);

cur_pc += 4;

if (!windowed) {

if (known_size > 0 && (cur_pc - func_start) >= known_size) {

break;

}

if (known_size == 0 && (is_ret || is_tail_branch) && cur_pc >= max_forward_target) {

const uint32_t* next_word = reinterpret_cast<const uint32_t*>(cur_pc);

uint32_t w = *next_word;

if (w == 0 || w == 0xd503201f /* nop */ || w == 0xd503233f /* paciasp */ ||

(w & 0xffc003e0) == 0xa98003e0 /* stp */) {

break;

}

if (is_ret) {

break;

}

cs_close(&cs_handle);

size_t total_bytes = insns_list.size() * 4;

// 4. Construct intra-function CFG jump table & assign lanes

struct JumpInfo {

size_t src_idx = 0;

size_t dst_idx = 0;

uintptr_t src_addr = 0;

uintptr_t dst_addr = 0;

bool is_forward = true;

int lane = -1;

};

std::map<uintptr_t, size_t> addr_to_idx;

for (size_t idx = 0; idx < insns_list.size(); ++idx) {

addr_to_idx[insns_list[idx].addr] = idx;

}

std::vector<JumpInfo> jumps;

for (size_t idx = 0; idx < insns_list.size(); ++idx) {

const auto& item = insns_list[idx];

if (item.is_branch && item.target_addr != 0) {

auto it = addr_to_idx.find(item.target_addr);

if (it != addr_to_idx.end()) {

JumpInfo j;

j.src_idx = idx;

j.dst_idx = it->second;

j.src_addr = item.addr;

j.dst_addr = item.target_addr;

j.is_forward = (j.dst_idx > j.src_idx);

jumps.push_back(j);

}

// Sort jumps by span descending (outer enclosing jumps take lower lane numbers)

std::vector<size_t> sorted_jump_indices(jumps.size());

for (size_t k = 0; k < jumps.size(); ++k) sorted_jump_indices[k] = k;

std::sort(sorted_jump_indices.begin(), sorted_jump_indices.end(), [&](size_t a, size_t b) {

size_t span_a = (jumps[a].dst_idx > jumps[a].src_idx) ? (jumps[a].dst_idx - jumps[a].src_idx) : (jumps[a].src_idx - jumps[a].dst_idx);

size_t span_b = (jumps[b].dst_idx > jumps[b].src_idx) ? (jumps[b].dst_idx - jumps[b].src_idx) : (jumps[b].src_idx - jumps[b].dst_idx);

if (span_a != span_b) return span_a > span_b;

return jumps[a].src_idx < jumps[b].src_idx;

});

const int max_lanes_limit = 4;

int num_lanes = 0;

for (size_t s_idx : sorted_jump_indices) {

auto& j = jumps[s_idx];

size_t top = std::min(j.src_idx, j.dst_idx);

size_t bot = std::max(j.src_idx, j.dst_idx);

int chosen_lane = 0;

while (chosen_lane < max_lanes_limit) {

bool conflict = false;

for (const auto& other : jumps) {

if (other.lane == chosen_lane) {

size_t o_top = std::min(other.src_idx, other.dst_idx);

size_t o_bot = std::max(other.src_idx, other.dst_idx);

if (std::max(top, o_top) <= std::min(bot, o_bot)) {

conflict = true;

break;

}

if (!conflict) break;

chosen_lane++;

}

if (chosen_lane < max_lanes_limit) {

j.lane = chosen_lane;

if (chosen_lane + 1 > num_lanes) {

num_lanes = chosen_lane + 1;

}

std::ostringstream ss;

ss << "======================================================================\n";

if (method) {

uint32_t flags = method->GetAccessFlags();

ss << " " << GetMethodFullName(method, flags) << "\n";

ss << " ArtMethod=" << reinterpret_cast<void*>(method)

<< " | AccessFlags: 0x" << std::hex << flags << std::dec

<< " (" << PrettyAccessFlags(flags) << ")\n";

} else if (sym_name && *sym_name) {

ss << " " << sym_name << "\n";

}

const char* slash = strrchr(so_name, '/');

const char* short_so = slash ? (slash + 1) : so_name;

ss << " Native Entry: 0x" << std::hex << pc << std::dec;

if (fbase > 0) {

ss << " [" << short_so << " + 0x" << std::hex << rel_offset << std::dec << "]";

}

if (sym_name && *sym_name) {

ss << " (" << sym_name << ")";

}

ss << "\n";

if (IsDlsymLookupStub(const_cast<void*>(native_pc))) {

ss << " [!] Native method is not yet bound (entry points to art_jni_dlsym_lookup_stub)\n";

}

size_t win_begin = 0;

size_t win_end = insns_list.size();

size_t hi_idx = static_cast<size_t>(-1);

if (windowed && !insns_list.empty()) {

for (size_t i = 0; i < insns_list.size(); ++i) {

if (insns_list[i].addr == highlight_pc) { hi_idx = i; break; }

}

if (hi_idx == static_cast<size_t>(-1)) {

for (size_t i = 0; i < insns_list.size(); ++i) {

if (insns_list[i].addr + 4 > highlight_pc) { hi_idx = i; break; }

}

if (hi_idx == static_cast<size_t>(-1)) hi_idx = insns_list.size() - 1;

}

const size_t win = static_cast<size_t>(listing_window);

const size_t total = insns_list.size();

if (total > win) {

// Retain window start if still in same function

if (t_nativeWinState.func_start == func_start && t_nativeWinState.win_begin < total) {

win_begin = t_nativeWinState.win_begin;

} else {

win_begin = (hi_idx > win / 3) ? (hi_idx - win / 3) : 0;

}

const size_t margin = 3;

// Only scroll window when arrow approaches the bottom or top boundary

if (hi_idx >= win_begin + win - margin) {

win_begin = (hi_idx + margin >= win) ? (hi_idx + margin - win + 1) : 0;

} else if (hi_idx < win_begin + margin) {

win_begin = (hi_idx >= margin) ? (hi_idx - margin) : 0;

}

if (win_begin + win > total) {

win_begin = (total > win) ? (total - win) : 0;

}

win_end = win_begin + win;

t_nativeWinState.func_start = func_start;

t_nativeWinState.win_begin = win_begin;

}

ss << " Size: " << total_bytes << " bytes (" << insns_list.size() << " instructions)";

if (windowed && (win_begin > 0 || win_end < insns_list.size())) {

ss << " showing [" << win_begin << ".." << (win_end ? win_end - 1 : 0) << "]";

}

ss << "\n";

ss << "----------------------------------------------------------------------\n";

if (win_begin > 0) {

ss << " ... (" << win_begin << " earlier instructions)\n";

}

// Box drawing characters: UP=1, DOWN=2, LEFT=4, RIGHT=8

static const char* kBoxMap[16] = {

" ", // 0: none

"│ ", // 1: UP

"│ ", // 2: DOWN

"│ ", // 3: UP | DOWN

"──", // 4: LEFT

"┘ ", // 5: UP | LEFT

"┐ ", // 6: DOWN | LEFT

"┤ ", // 7: UP | DOWN | LEFT

"──", // 8: RIGHT

"└─", // 9: UP | RIGHT

"┌─", // 10: DOWN | RIGHT

"├─", // 11: UP | DOWN | RIGHT

"──", // 12: LEFT | RIGHT

"┴─", // 13: UP | LEFT | RIGHT

"┬─", // 14: DOWN | LEFT | RIGHT

"┼─" // 15: UP | DOWN | LEFT | RIGHT

};

for (size_t i = win_begin; i < win_end; ++i) {

const auto& item = insns_list[i];

const bool is_cur = windowed && (item.addr == highlight_pc || i == hi_idx);

std::string row_graph;

if (num_lanes > 0) {

bool pass_horiz = false;

bool is_any_dst = false;

for (int l = 0; l < num_lanes; ++l) {

bool has_up = false, has_down = false, is_src = false, is_dst = false;

for (const auto& j : jumps) {

if (j.lane != l) continue;

size_t top = std::min(j.src_idx, j.dst_idx);

size_t bot = std::max(j.src_idx, j.dst_idx);

if (i > top && i <= bot) has_up = true;

if (i >= top && i < bot) has_down = true;

if (i == j.src_idx) is_src = true;

if (i == j.dst_idx) is_dst = true;

}

if (is_dst) is_any_dst = true;

bool left_in = pass_horiz;

if (is_src || is_dst) pass_horiz = true;

bool right_out = pass_horiz;

int mask = 0;

if (has_up) mask |= 1;

if (has_down) mask |= 2;

if (left_in) mask |= 4;

if (right_out) mask |= 8;

row_graph += kBoxMap[mask];

}

if (pass_horiz) {

if (is_any_dst) {

row_graph += "─> ";

} else {

row_graph += "── ";

}

} else {

row_graph += " ";

}

} else {

row_graph = "";

}

char off_str[32];

if (item.addr >= func_start) {

snprintf(off_str, sizeof(off_str), "[0x%04x]", static_cast<unsigned int>(item.addr - func_start));

} else {

snprintf(off_str, sizeof(off_str), "[-0x%02x]", static_cast<unsigned int>(func_start - item.addr));

}

char line_prefix[160];

snprintf(line_prefix, sizeof(line_prefix), "%s%s%-8s 0x%-10llx %02x %02x %02x %02x | ",

is_cur ? " -> " : " ",

row_graph.c_str(),

off_str,

static_cast<unsigned long long>(item.addr),

item.bytes[0], item.bytes[1], item.bytes[2], item.bytes[3]);

char disasm_buf[128];

snprintf(disasm_buf, sizeof(disasm_buf), "%-8s %s", item.mnemonic.c_str(), item.op_str.c_str());

std::string disasm_str = disasm_buf;

std::string sym_comment = ResolveSymbol(item.target_addr, &cache, func_start, func_start + total_bytes);

ss << line_prefix << disasm_str;

if (!sym_comment.empty()) {

if (disasm_str.length() < 34) {

ss << std::string(34 - disasm_str.length(), ' ');

} else {

ss << " ";

}

ss << sym_comment;

}

ss << "\n";

}

if (win_end < insns_list.size()) {

ss << " ... (" << (insns_list.size() - win_end) << " more instructions)\n";

}

xdl_addr_clean(&cache);

ss << "======================================================================\n";

return ss.str();

}

static std::string JniMangle(const std::string& str) {

std::string out;

out.reserve(str.size() * 2);

for (char c : str) {

if (c == '/' || c == '.') {

out.push_back('_');

} else if (c == '_') {

out += "_1";

} else if (c == ';') {

out += "_2";

} else if (c == '[') {

out += "_3";

} else {

out.push_back(c);

}

return out;

}

struct JniScanCtx {

const char* sym_name;

void* found_addr = nullptr;

std::string found_lib;

};

void* resolveNativeMethod(ArtMethod* method, JNIEnv* env) {

if (!method || !method->IsNative()) return nullptr;

void* entry = method->GetEntryPointFromJni();

if (entry && !IsDlsymLookupStub(entry)) {

return entry; // Already bound!

}

EnsureSymbolsInitialized();

std::string full_sig;

if (g_pretty_method_fn) {

full_sig = g_pretty_method_fn(method, true);

}

if (full_sig.empty()) return nullptr;

std::string class_name, method_name;

size_t paren = full_sig.find('(');

if (paren != std::string::npos) {

size_t dot = full_sig.rfind('.', paren);

if (dot != std::string::npos) {

method_name = full_sig.substr(dot + 1, paren - (dot + 1));

size_t space = full_sig.rfind(' ', dot);

if (space != std::string::npos) {

class_name = full_sig.substr(space + 1, dot - (space + 1));

}

// =========================================================================

// Strategy 1: Safe JNI Symbol Synthesis & Loaded ELF Module Scanning (0 Risk)

// =========================================================================

if (!class_name.empty() && !method_name.empty()) {

std::string short_sym = "Java_" + JniMangle(class_name) + "_" + JniMangle(method_name);

JniScanCtx sctx{short_sym.c_str(), nullptr, ""};

dl_iterate_phdr([](struct dl_phdr_info* info, size_t, void* data) -> int {

auto* ctx = reinterpret_cast<JniScanCtx*>(data);

if (!info->dlpi_name || !info->dlpi_name[0]) return 0;

const char* p = info->dlpi_name;

if (strstr(p, "/system/") || strstr(p, "/apex/") || strstr(p, "libart.so")) return 0;

void* h = xdl_open(info->dlpi_name, XDL_DEFAULT);

if (!h) h = xdl_open(info->dlpi_name, XDL_TRY_FORCE_LOAD);

if (h) {

void* sym = xdl_sym(h, ctx->sym_name, nullptr);

if (!sym) sym = xdl_dsym(h, ctx->sym_name, nullptr);

xdl_close(h);

if (sym) {

ctx->found_addr = sym;

ctx->found_lib = info->dlpi_name;

return 1;

}

return 0;

}, &sctx);

if (sctx.found_addr != nullptr) {

PI_LOGI("[PI Native] Stage 1 (Symbol Scan): Bound %s -> %s!%s (%p)",

full_sig.c_str(), sctx.found_lib.c_str(), short_sym.c_str(), sctx.found_addr);

method->SetEntryPointFromJni(sctx.found_addr);

return sctx.found_addr;

}

// =========================================================================

// Strategy 2: Guarded Reflection Invocation (Try-Catch + Dummy Instance/Args)

// =========================================================================

if (!env) {

env = Pine::GetCurrentJNIEnv();

}

if (env && !class_name.empty()) {

std::string slash_class = class_name;

for (char& c : slash_class) if (c == '.') c = '/';

jclass localCls = env->FindClass(slash_class.c_str());

if (env->ExceptionCheck()) {

env->ExceptionClear();

localCls = nullptr;

}

if (!localCls) {

jclass atCls = env->FindClass("android/app/ActivityThread");

if (env->ExceptionCheck()) env->ExceptionClear();

if (atCls) {

jmethodID curAppMid = env->GetStaticMethodID(atCls, "currentApplication", "()Landroid/app/Application;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (curAppMid) {

jobject app = env->CallStaticObjectMethod(atCls, curAppMid);

if (env->ExceptionCheck()) env->ExceptionClear();

if (app) {

jclass appCls = env->GetObjectClass(app);

jmethodID getClMid = env->GetMethodID(appCls, "getClassLoader", "()Ljava/lang/ClassLoader;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (getClMid) {

jobject cl = env->CallObjectMethod(app, getClMid);

if (env->ExceptionCheck()) env->ExceptionClear();

if (cl) {

jclass clCls = env->GetObjectClass(cl);

jmethodID loadClsMid = env->GetMethodID(clCls, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (loadClsMid) {

jstring jname = env->NewStringUTF(class_name.c_str());

localCls = (jclass)env->CallObjectMethod(cl, loadClsMid, jname);

if (env->ExceptionCheck()) env->ExceptionClear();

env->DeleteLocalRef(jname);

}

env->DeleteLocalRef(clCls);

env->DeleteLocalRef(cl);

}

env->DeleteLocalRef(appCls);

env->DeleteLocalRef(app);

}

env->DeleteLocalRef(atCls);

}

if (localCls) {

jclass classCls = env->FindClass("java/lang/Class");

if (env->ExceptionCheck()) env->ExceptionClear();

if (classCls) {

jmethodID getDeclaredMethods = env->GetMethodID(classCls, "getDeclaredMethods", "()[Ljava/lang/reflect/Method;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (getDeclaredMethods) {

auto methodsArr = (jobjectArray)env->CallObjectMethod(localCls, getDeclaredMethods);

if (env->ExceptionCheck()) env->ExceptionClear();

if (methodsArr) {

jsize len = env->GetArrayLength(methodsArr);

jobject targetMethodObj = nullptr;

jclass methodCls = env->FindClass("java/lang/reflect/Method");

if (env->ExceptionCheck()) env->ExceptionClear();

jmethodID getNameMid = methodCls ? env->GetMethodID(methodCls, "getName", "()Ljava/lang/String;") : nullptr;

if (env->ExceptionCheck()) env->ExceptionClear();

for (jsize i = 0; i < len; ++i) {

jobject m = env->GetObjectArrayElement(methodsArr, i);

if (!m) continue;

if (getNameMid) {

jstring jmn = (jstring)env->CallObjectMethod(m, getNameMid);

if (env->ExceptionCheck()) env->ExceptionClear();

if (jmn) {

const char* s = env->GetStringUTFChars(jmn, nullptr);

if (s) {

if (method_name == s) {

targetMethodObj = m;

env->ReleaseStringUTFChars(jmn, s);

env->DeleteLocalRef(jmn);

break;

}

env->ReleaseStringUTFChars(jmn, s);

}

env->DeleteLocalRef(jmn);

}

env->DeleteLocalRef(m);

}

if (targetMethodObj && methodCls) {

// Set accessible

jclass accCls = env->FindClass("java/lang/reflect/AccessibleObject");

if (env->ExceptionCheck()) env->ExceptionClear();

if (accCls) {

jmethodID setAcc = env->GetMethodID(accCls, "setAccessible", "(Z)V");

if (env->ExceptionCheck()) env->ExceptionClear();

if (setAcc) {

env->CallVoidMethod(targetMethodObj, setAcc, JNI_TRUE);

if (env->ExceptionCheck()) env->ExceptionClear();

}

env->DeleteLocalRef(accCls);

}

// Prepare dummy arguments

jmethodID getParamTypesMid = env->GetMethodID(methodCls, "getParameterTypes", "()[Ljava/lang/Class;");

if (env->ExceptionCheck()) env->ExceptionClear();

auto paramTypes = (jobjectArray)env->CallObjectMethod(targetMethodObj, getParamTypesMid);

if (env->ExceptionCheck()) env->ExceptionClear();

jsize paramCount = paramTypes ? env->GetArrayLength(paramTypes) : 0;

jclass objCls = env->FindClass("java/lang/Object");

if (env->ExceptionCheck()) env->ExceptionClear();

jobjectArray argsArr = objCls ? env->NewObjectArray(paramCount, objCls, nullptr) : nullptr;

for (jsize p = 0; p < paramCount; ++p) {

jobject pType = env->GetObjectArrayElement(paramTypes, p);

if (!pType) continue;

jclass typeCls = env->GetObjectClass(pType);

jmethodID isPrimMid = env->GetMethodID(typeCls, "isPrimitive", "()Z");

jmethodID typeNameMid = env->GetMethodID(typeCls, "getName", "()Ljava/lang/String;");

jboolean isPrim = env->CallBooleanMethod(pType, isPrimMid);

if (env->ExceptionCheck()) env->ExceptionClear();

if (isPrim && argsArr) {

jstring pName = (jstring)env->CallObjectMethod(pType, typeNameMid);

if (env->ExceptionCheck()) env->ExceptionClear();

if (pName) {

const char* pn = env->GetStringUTFChars(pName, nullptr);

if (pn) {

if (strcmp(pn, "int") == 0 || strcmp(pn, "byte") == 0 || strcmp(pn, "short") == 0) {

jclass intCls = env->FindClass("java/lang/Integer");

jmethodID valOf = intCls ? env->GetStaticMethodID(intCls, "valueOf", "(I)Ljava/lang/Integer;") : nullptr;

if (valOf) {

jobject boxed = env->CallStaticObjectMethod(intCls, valOf, 0);

if (boxed) { env->SetObjectArrayElement(argsArr, p, boxed); env->DeleteLocalRef(boxed); }

}

if (intCls) env->DeleteLocalRef(intCls);

} else if (strcmp(pn, "boolean") == 0) {

jclass boolCls = env->FindClass("java/lang/Boolean");

jmethodID valOf = boolCls ? env->GetStaticMethodID(boolCls, "valueOf", "(Z)Ljava/lang/Boolean;") : nullptr;

if (valOf) {

jobject boxed = env->CallStaticObjectMethod(boolCls, valOf, JNI_FALSE);

if (boxed) { env->SetObjectArrayElement(argsArr, p, boxed); env->DeleteLocalRef(boxed); }

}

if (boolCls) env->DeleteLocalRef(boolCls);

} else if (strcmp(pn, "long") == 0) {

jclass longCls = env->FindClass("java/lang/Long");

jmethodID valOf = longCls ? env->GetStaticMethodID(longCls, "valueOf", "(J)Ljava/lang/Long;") : nullptr;

if (valOf) {

jobject boxed = env->CallStaticObjectMethod(longCls, valOf, (jlong)0);

if (boxed) { env->SetObjectArrayElement(argsArr, p, boxed); env->DeleteLocalRef(boxed); }

}

if (longCls) env->DeleteLocalRef(longCls);

}

env->ReleaseStringUTFChars(pName, pn);

}

env->DeleteLocalRef(pName);

}

env->DeleteLocalRef(typeCls);

env->DeleteLocalRef(pType);

}

if (paramTypes) env->DeleteLocalRef(paramTypes);

// Prepare receiver instance (null if static, Unsafe allocateInstance if virtual)

jobject receiver = nullptr;

if (!method->IsStatic()) {

jclass unsafeCls = env->FindClass("sun/misc/Unsafe");

if (env->ExceptionCheck()) env->ExceptionClear();

if (unsafeCls) {

jfieldID theUnsafe = env->GetStaticFieldID(unsafeCls, "theUnsafe", "Lsun/misc/Unsafe;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (theUnsafe) {

jobject uObj = env->GetStaticObjectField(unsafeCls, theUnsafe);

if (env->ExceptionCheck()) env->ExceptionClear();

jmethodID allocMid = uObj ? env->GetMethodID(unsafeCls, "allocateInstance", "(Ljava/lang/Class;)Ljava/lang/Object;") : nullptr;

if (env->ExceptionCheck()) env->ExceptionClear();

if (allocMid) {

receiver = env->CallObjectMethod(uObj, allocMid, localCls);

if (env->ExceptionCheck()) env->ExceptionClear();

}

if (uObj) env->DeleteLocalRef(uObj);

}

env->DeleteLocalRef(unsafeCls);

}

// Invoke method under try-catch

jmethodID invokeMid = env->GetMethodID(methodCls, "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");

if (env->ExceptionCheck()) env->ExceptionClear();

if (invokeMid) {

env->CallObjectMethod(targetMethodObj, invokeMid, receiver, argsArr);

if (env->ExceptionCheck()) {

env->ExceptionClear();

}

if (receiver) env->DeleteLocalRef(receiver);

if (argsArr) env->DeleteLocalRef(argsArr);

if (objCls) env->DeleteLocalRef(objCls);

env->DeleteLocalRef(targetMethodObj);

}

if (methodCls) env->DeleteLocalRef(methodCls);

env->DeleteLocalRef(methodsArr);

}

env->DeleteLocalRef(classCls);

}

env->DeleteLocalRef(localCls);

}

void* resolved = method->GetEntryPointFromJni();

if (resolved && !IsDlsymLookupStub(resolved)) {

PI_LOGI("[PI Native] Stage 2 (Reflection Invoke): Bound %s -> %p", full_sig.c_str(), resolved);

return resolved;

}

return nullptr;

}

std::string dumpNative(ArtMethod* method, int max_instructions) {

if (!method) {

return "[PI Native] Error: ArtMethod is null\n";

}

void* entry = method->GetEntryPointFromJni();

if (!entry) {

return "[PI Native] Error: ArtMethod entry_point_from_jni_ is null\n";

}

// If entry points to lazy binding stub, automatically resolve it!

if (IsDlsymLookupStub(entry)) {

void* resolved = resolveNativeMethod(method, nullptr);

if (resolved) {

entry = resolved;

}

return dumpNative(entry, max_instructions, method, 0);

}

std::string resolveAddressSymbol(uintptr_t addr) {

void* cache = nullptr;

std::string s = ResolveSymbol(addr, &cache, 0, 0);

if (cache) xdl_addr_clean(&cache);

return s;

}

std::string demangle(const char* mangled) {

return Demangle(mangled);

}

std::string demangle(const std::string& mangled) {

return Demangle(mangled.c_str());

}

} // namespace PI

ArtPI/src/native/pi_native.cpp at master · CKAndroidProject/ArtPI · GitHub

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