初看iOS中-[NSBundle bundleIdentifier]及-[NSBundle infoDictionary]的系统框架源码实现

将Foundation二进制文件丢到hopper里，

直接就能搜到-[NSBundle bundleIdentifier]是调用的-[NSBundle infoDictionary]实现的。

void * -[NSBundle bundleIdentifier](void * self, void * _cmd) {
    rax = [[self infoDictionary] objectForKey:*_kCFBundleIdentifierKey];
    return rax;
}

然后-[NSBundle infoDictionary]的实现是

void * -[NSBundle infoDictionary](void * self, void * _cmd) {
    rax = [self _cfBundle];
    if (rax != 0x0) {
            rax = CFBundleGetInfoDictionary(rax);
            rax = [rax retain];
            rax = [rax autorelease];
    }
    else {
            rax = 0x0;
    }
    return rax;
}

struct __CFBundle * -[NSBundle _cfBundle](void * self, void * _cmd) {
    rdi = self;
    rax = *(rdi + 0x10);
    if (rax == 0x0) {
            rbx = rdi;
            rsi = *(rdi + 0x30);
            if (rsi != 0x0) {
                    rax = CFURLCreateWithFileSystemPath(0x0, rsi, 0x0, 0x1);
                    *(rbx + 0x10) = CFBundleCreate(0x0, rax);
                    CFRelease(rax);
                    rax = *(rbx + 0x10);
            }
    }
    return rax;
}


int CFURLCreateWithFileSystemPath(int allocator, int filePath, int pathStyle, int isDirectory) {
    rax = _CFURLCreateWithFileSystemPath(allocator, filePath, pathStyle, isDirectory);
    return rax;
}

int CFBundleCreate(int allocator, int bundleURL) {
    rax = _CFBundleCreate(allocator, bundleURL);
    return rax;
}

 bundle的创建不看了

int CFBundleGetInfoDictionary(int bundle) {
    rax = _CFBundleGetInfoDictionary(bundle);
    return rax;
}

接着将CoreFoundation框架丢到hopper里面，找到_CFBundleGetInfoDictionary

int _CFBundleGetInfoDictionary(int arg0) {
    pthread_mutex_lock(arg0 + 0xd0);
    __CFBundleRefreshInfoDictionaryAlreadyLocked(arg0);
    pthread_mutex_unlock(arg0 + 0xd0);
    rax = *(arg0 + 0x18);
    return rax;
}

int __CFBundleRefreshInfoDictionaryAlreadyLocked(int arg0) {
    rdi = arg0;
    if (*(rdi + 0x18) == 0x0) goto loc_1a8a23;

loc_1a8a00:
    rax = *___stack_chk_guard;
    if (rax != *___stack_chk_guard) {
            rax = __stack_chk_fail();
    }
    return rax;

loc_1a8a23:
    r15 = rdi;
    var_60 = 0x0;
    rax = __CFBundleCopyInfoDictionaryInDirectoryWithVersion(___kCFAllocatorSystemDefault, *(r15 + 0x10), &var_60, *(int8_t *)(r15 + 0x35) & 0xff, r8, r9);
    *(r15 + 0x18) = rax;
    rdi = *(r15 + 0x1c8);
    if (rdi != 0x0) {
            _CFRelease(rdi);
            r14 = *(r15 + 0x18);
    }
    else {
            r14 = rax;
    }
    *(r15 + 0x1c8) = var_60;
    if (r14 == 0x0) goto loc_1a8a00;

loc_1a8a77:
    rax = _CFDictionaryGetValue(r14, @"CFBundleNumericVersion");
    r13 = rax;
    if (rax != 0x0) goto loc_1a8ab9;

loc_1a8a9b:
    rax = _CFDictionaryGetValue(r14, @"CFBundleVersion");
    r13 = rax;
    if (rax == 0x0) goto loc_1a8a00;

loc_1a8ab9:
    if (_CFGetTypeID(r13) != _CFStringGetTypeID()) goto loc_1a8b38;

loc_1a8ace:
    var_68 = @"CFBundleNumericVersion";
    rax = _CFStringGetLength(r13);
    r12 = rax + 0xffffffffffffffff;
    rcx = 0x0;
    if (r12 > 0x9) goto loc_1a8d29;

loc_1a8aea:
    rbx = rax;
    rdi = r13;
    r13 = &var_50;
    _CFStringGetCharacters(rdi, 0x0, rbx);
    rdi = *(int32_t *)r13;
    if (rdi <= 0x39) goto loc_1a8b61;

loc_1a8b13:
    r9 = 0x0;
    r11 = 0x0;
    rax = 0x0;
    rsi = 0x0;
    if (rdi != 0x2e) goto loc_1a8c71;

loc_1a8b30:
    rax = 0x0;
    r13 = &var_4E;
    goto loc_1a8b98;

loc_1a8b98:
    rdx = 0x0;
    goto loc_1a8b9a;

loc_1a8b9a:
    r8 = 0x8000;
    if (r12 <= 0x0) goto loc_1a8bf8;

loc_1a8ba5:
    rdi = *(int16_t *)r13 & 0xffff;
    r9 = 0x0;
    if (rdi <= 0x39) goto loc_1a8c04;

loc_1a8bb8:
    rbx = r12;
    goto loc_1a8c6c;

loc_1a8c6c:
    r11 = rdx;
    goto loc_1a8c6f;

loc_1a8c6f:
    rsi = 0x0;
    goto loc_1a8c71;

loc_1a8c71:
    rdi = rdi + 0xffffff9f;
    rcx = 0x0;
    if ((rdi > 0x5) || ((BIT_TEST(0x2b, rdi)))) goto loc_1a8d29;

loc_1a8c8e:
    r8 = *(int32_t *)(0x379cf0 + sign_extend_64(rdi) * 0x4);
    rdi = 0x0;
    if (rbx < 0x2) goto loc_1a8cff;

loc_1a8ca5:
    rdi = *(int16_t *)(r13 + 0x2) & 0xffff;
    rdi = rdi + 0xffffffd0;
    rcx = 0x0;
    if (rdi > 0x9) goto loc_1a8d29;

loc_1a8cb5:
    rcx = 0x0;
    if (rbx < 0x3) goto loc_1a8cff;

loc_1a8cbd:
    r10 = *(int16_t *)(r13 + 0x4) & 0xffff;
    if (r10 > 0x39) goto loc_1a8d29;

loc_1a8ccc:
    rdi = r10 + (rdi + rdi * 0x4) * 0x2 + 0xffffffffffffffd0;
    rcx = 0x0;
    rbx = rbx + 0xfffffffffffffffd;
    if (rbx <= 0x0) goto loc_1a8cff;

loc_1a8cdc:
    r10 = *(int16_t *)(r13 + 0x6) & 0xffff;
    if (r10 > 0x39) goto loc_1a8d29;

loc_1a8ceb:
    rdi = r10 + (rdi + rdi * 0x4) * 0x2 + 0xffffffffffffffd0;
    rbx = rbx > 0x1 ? 0x1 : 0x0;
    rdx = r11;
    goto loc_1a8d04;

loc_1a8d04:
    rcx = 0x0;
    if ((rdi <= 0xff) && (rbx == 0x0)) {
            rcx = rdi + r9 + (rdx << 0x1c) + (rax << 0x18) + (rsi << 0x14) + r8;
    }
    goto loc_1a8d29;

loc_1a8d29:
    var_54 = 0x0;
    var_54 = rcx;
    rax = _CFGetAllocator(r15);
    rax = _CFNumberCreate(rax, 0x3, &var_54);
    _CFDictionarySetValue(r14, var_68, rax);
    _CFRelease(rax);
    goto loc_1a8a00;

loc_1a8cff:
    rdx = r11;
    goto loc_1a8d02;

loc_1a8d02:
    rbx = 0x0;
    goto loc_1a8d04;

loc_1a8c04:
    rsi = (rdi & 0xffff) + 0xffffffd0;
    rbx = r12 - 0x1;
    if (rbx <= 0x0) goto loc_1a8bfa;

loc_1a8c12:
    rcx = r13 + 0x2;
    rdi = *(int16_t *)rcx & 0xffff;
    r9 = 0x0;
    if (rdi != 0x2e) goto loc_1a8d66;

loc_1a8c26:
    rbx = r12 + 0xfffffffffffffffe;
    if (rbx <= 0x0) goto loc_1a8bfa;

loc_1a8c2f:
    r10 = r13 + 0x4;
    rdi = *(int16_t *)r10 & 0xffff;
    r9 = 0x0;
    if (rdi <= 0x39) goto loc_1a8d71;

loc_1a8c49:
    r13 = r10;
    goto loc_1a8d69;

loc_1a8d69:
    r11 = rdx;
    goto loc_1a8c71;

loc_1a8d71:
    r9 = ((rdi & 0xffff) << 0x10) + 0xffd00000;
    r12 = r12 + 0xfffffffffffffffd;
    if (r12 <= 0x0) goto loc_1a8bfd;

loc_1a8d8a:
    r13 = r13 + 0x6;
    rdi = *(int16_t *)r13 & 0xffff;
    rbx = r12;
    goto loc_1a8d69;

loc_1a8bfd:
    rdi = 0x0;
    goto loc_1a8d02;

loc_1a8bfa:
    r9 = 0x0;
    goto loc_1a8bfd;

loc_1a8d66:
    r13 = rcx;
    goto loc_1a8d69;

loc_1a8bf8:
    rsi = 0x0;
    goto loc_1a8bfa;

loc_1a8b61:
    rdx = (rdi & 0xffff) + 0xffffffd0;
    r8 = 0x8000;
    if (r12 <= 0x0) goto loc_1a8bc0;

loc_1a8b72:
    rdi = var_4E & 0xffff;
    if (rdi <= 0x39) goto loc_1a8bd2;

loc_1a8b81:
    if (rdi != 0x2e) goto loc_1a8c51;

loc_1a8b8b:
    r13 = &var_4C;
    r12 = rbx + 0xfffffffffffffffe;
    rax = rdx;
    goto loc_1a8b98;

loc_1a8c51:
    r13 = &var_4E;
    r9 = 0x0;
    rbx = r12;
    r11 = 0x0;
    rax = rdx;
    goto loc_1a8c6f;

loc_1a8bd2:
    rax = (rdi & 0xffff) + 0xffffffd0;
    rcx = rbx + 0xfffffffffffffffe;
    if (rcx <= 0x0) goto loc_1a8bf8;

loc_1a8be1:
    rdi = var_4C & 0xffff;
    if (rdi != 0x2e) goto loc_1a8c62;

loc_1a8beb:
    r13 = &var_4A;
    r12 = rbx + 0xfffffffffffffffd;
    goto loc_1a8b9a;

loc_1a8c62:
    r13 = &var_4C;
    r9 = 0x0;
    rbx = rcx;
    goto loc_1a8c6c;

loc_1a8bc0:
    rax = rdx;
    rdx = 0x0;
    r9 = 0x0;
    rdi = 0x0;
    rbx = 0x0;
    rsi = 0x0;
    goto loc_1a8d04;

loc_1a8b38:
    if (_CFGetTypeID(r13) != _CFNumberGetTypeID()) {
            _CFDictionaryRemoveValue(r14, @"CFBundleNumericVersion");
    }
    goto loc_1a8a00;
}

int __CFBundleCopyInfoDictionaryInDirectoryWithVersion(int arg0, int arg1, int arg2, int arg3, int arg4, int arg5) {
    rcx = arg3;
    rdx = arg2;
    rsi = arg1;
    rdi = arg0;
    if (rsi == 0x0) goto loc_24b9d;

loc_24b45:
    var_F0 = rdi;
    if (rcx > 0x3) goto loc_24f54;

loc_24b55:
    r14 = rdx;
    r15 = rsi;
    goto *0x25000[sign_extend_64(*(int32_t *)(0x25000 + (rcx & 0xff) * 0x4)) + 0x25000];

loc_24b6e:
    rbx = _CFURLCreateWithString(___kCFAllocatorSystemDefault, @"Resources/", r15);
    r12 = @"Resources/Info-macos.plist";
    rax = @"Resources/Info.plist";
    goto loc_24c78;

loc_24c78:
    if (rbx == 0x0) goto loc_24f54;

loc_24c81:
    var_E0 = rax;
    var_E8 = r14;
    var_F8 = rbx;
    rax = _CFURLCopyAbsoluteURL(rbx);
    r13 = r15;
    r15 = _CFURLCopyFileSystemPath(rax, 0x0);
    _CFRelease(rax);
    var_50 = 0x0;
    *(&var_50 + 0x8) = &var_50;
    *(&var_50 + 0x10) = 0x2000000000;
    *(&var_50 + 0x18) = 0x0;
    r14 = &var_70;
    *r14 = 0x0;
    *(r14 + 0x8) = r14;
    *(r14 + 0x10) = 0x2000000000;
    *(r14 + 0x18) = 0x0;
    r12 = r12;
    rbx = r15;
    if (r15 != 0x0) {
            r15 = r13;
            r13 = _CFStringGetLength(@"Info.plist");
            rax = _CFStringGetLength(@"Info-macos.plist");
            var_C8 = __NSConcreteStackBlock;
            *(&var_C8 + 0x8) = 0x42000000;
            *(&var_C8 + 0x10) = ____CFBundleCopyInfoDictionaryInDirectoryWithVersion_block_invoke;
            *(&var_C8 + 0x18) = ___block_descriptor_tmp;
            *(&var_C8 + 0x20) = r14;
            *(&var_C8 + 0x30) = rax;
            *(&var_C8 + 0x38) = r12;
            *(&var_C8 + 0x40) = r15;
            *(&var_C8 + 0x28) = &var_50;
            *(&var_C8 + 0x48) = r13;
            *(&var_C8 + 0x50) = var_E0;
            __CFIterateDirectory();
            _CFRelease(rbx);
    }
    _CFRelease(var_F8);
    rsi = *(var_68 + 0x18);
    if (rsi == 0x0) goto loc_24de2;

loc_24db2:
    var_D0 = 0x0;
    _CFURLCreateDataAndPropertiesFromResource(___kCFAllocatorSystemDefault, rsi, &var_D0, 0x0, 0x0, 0x0);
    rsi = var_D0;
    if (rsi == 0x0) goto loc_24de2;

loc_24ddc:
    rax = var_68;
    goto loc_24e21;

loc_24e21:
    r12 = *(rax + 0x18);
    var_D8 = 0x0;
    r15 = var_F0;
    rax = _CFPropertyListCreateWithData(r15, rsi, 0x1, 0x0, &var_D8);
    rbx = rax;
    if (rax == 0x0) goto loc_24e7a;

loc_24e54:
    if (_CFDictionaryGetTypeID() == _CFGetTypeID(rbx)) goto loc_24ee2;

loc_24e69:
    _CFRelease(rbx);
    goto loc_24ec7;

loc_24ec7:
    rbx = _CFDictionaryCreateMutable(r15, 0x0, _kCFTypeDictionaryKeyCallBacks, _kCFTypeDictionaryValueCallBacks);
    goto loc_24ee2;

loc_24ee2:
    _CFRelease(0x0);
    if ((var_E8 != 0x0) && (r12 != 0x0)) {
            _CFRetain(r12);
            *var_E8 = r12;
    }
    goto loc_24f0f;

loc_24f0f:
    rdi = *(var_68 + 0x18);
    if (rdi != 0x0) {
            _CFRelease(rdi);
    }
    rdi = *(var_48 + 0x18);
    if (rdi != 0x0) {
            _CFRelease(rdi);
    }
    _Block_object_dispose(&var_70, 0x8);
    _Block_object_dispose(&var_50, 0x8);
    if (rbx == 0x0) {
            rbx = _CFDictionaryCreateMutable(var_F0, 0x0, _kCFTypeDictionaryKeyCallBacks, _kCFTypeDictionaryValueCallBacks);
    }
    goto loc_24f73;

loc_24f73:
    __CFBundleInfoPlistProcessInfoDictionary(rbx);
    goto loc_24f7b;

loc_24f7b:
    if (*___stack_chk_guard == *___stack_chk_guard) {
            rax = rbx;
    }
    else {
            rax = __stack_chk_fail();
    }
    return rax;

loc_24e7a:
    rdi = var_D8;
    if (rdi != 0x0) {
            _CFLog(0x3, @"There was an error parsing the Info.plist for the bundle at URL <%p>: %@ - %ld", *(var_48 + 0x18), _CFErrorGetDomain(rdi), _CFErrorGetCode(var_D8), 0x0, stack[2015]);
            _CFRelease(var_D8);
    }
    goto loc_24ec7;

loc_24de2:
    rsi = *(var_48 + 0x18);
    if (rsi == 0x0) goto loc_24e73;

loc_24df3:
    var_D0 = 0x0;
    _CFURLCreateDataAndPropertiesFromResource(___kCFAllocatorSystemDefault, rsi, &var_D0, 0x0, 0x0, 0x0);
    rsi = var_D0;
    if (rsi == 0x0) goto loc_24e73;

loc_24e1d:
    rax = var_48;
    goto loc_24e21;

loc_24e73:
    rbx = 0x0;
    goto loc_24f0f;

loc_24f54:
    rbx = _CFDictionaryCreateMutable(var_F0, 0x0, _kCFTypeDictionaryKeyCallBacks, _kCFTypeDictionaryValueCallBacks);
    goto loc_24f73;

loc_24ba4:
    rbx = _CFURLCreateWithString(___kCFAllocatorSystemDefault, @"Support%20Files/", r15);
    r12 = @"Support%20Files/Info-macos.plist";
    rax = @"Support%20Files/Info.plist";
    goto loc_24c78;

loc_24bd3:
    rbx = _CFURLCreateWithString(___kCFAllocatorSystemDefault, @"Contents/", r15);
    r12 = @"Contents/Info-macos.plist";
    rax = @"Contents/Info.plist";
    goto loc_24c78;

loc_24bff:
    rax = _CFURLCopyFileSystemPath(r15, 0x0);
    if (rax == 0x0) goto loc_24f54;

loc_24c12:
    r13 = rax;
    rax = _CFStringHasSuffix(rax, @"Support Files");
    r12 = @"Resources/Info-macos.plist";
    var_E0 = @"Resources/Info.plist";
    if ((rax == 0x0) && (_CFStringHasSuffix(r13, @"Contents") == 0x0)) {
            if (_CFStringHasSuffix(r13, @"Resources") != 0x0) {
                    rbx = 0x0;
            }
            else {
                    rbx = _CFRetain(r15);
                    r12 = @"Info-macos.plist";
                    var_E0 = @"Info.plist";
            }
    }
    else {
            rbx = 0x0;
    }
    _CFRelease(r13);
    rax = var_E0;
    goto loc_24c78;

loc_24b9d:
    rbx = 0x0;
    goto loc_24f7b;
}

rax = @"Resources/Info.plist";   

可以看到读取的是 Resources文件夹下的Info.plist。后面还有其他路径下的。

还发现一个打开文件的方法

void _____CFLookupCFNetworkFunction_block_invoke(void * _block) {
    rax = ___CFgetenvIfNotRestricted("CFNETWORK_LIBRARY_PATH");
    rdi = "/System/Library/Frameworks/CFNetwork.framework/CFNetwork";
    if (rax != 0x0) {
            rdi = rax;
    }
    *___CFLookupCFNetworkFunction.image = dlopen(rdi, 0x5);
    return;
}

好复杂，本来想的是直接读取文件，解析，可好像不是这样 的。