android native 调试打印调用栈

Myth丶恋晨 2022-03-25 15:04 724阅读 0赞

在调试 android 某些应用时，需要打印调用栈， 但是高版本的5.0 
    以上已经去掉了libcorkscrew.so 和 libcutils.so 两个库，
    改用其他的google 库文件，但是可以使用andorid 4.4 ， 4.3 系统使用。
    使用时可以直接调用 getCallStack（）该方法即可。

android 6.0 可用 
    
    typedef int (*Unw_BackTrace_Func)(void**, int);
    void print_backtrace() {
        static Unw_BackTrace_Func unw_backtrace = NULL;
        if (!unw_backtrace) {
            void *hanle = dlopen("libunwind.so", RTLD_NOW);
            unw_backtrace = (Unw_BackTrace_Func)dlsym(hanle, "unw_backtrace");
        }
    
        void *buffer[32] = { 0 };
        int n = unw_backtrace((void**)&buffer, 32);
        for(int i = 1; i < n; i++) {
            const char *file = "\t\t\t\t";
            const char *symbol = "\t\t\t\t";
            Dl_info info;
            if (dladdr(buffer[i], &info)) {
                if (info.dli_sname) {
                    symbol = info.dli_sname;
                }
                if (info.dli_fname) {
                    file = info.dli_fname;
                }
            }
            __android_log_print(ANDROID_LOG_INFO, TAG, "uuu:#%02d: %p,%s,%s", i, buffer[i], symbol, file);
        }
    }

/********************************hh********************************/
    
    #include <utils/CallStack.h>
    #include <utils/Trace.h>
    #include <dlfcn.h>
    #include <unwind.h>
    #include <dlfcn.h>
    #define MAX_DEPTH                       66
    #define MAX_BACKTRACE_LINE_LENGTH   800
    #define PATH "/system/lib/libcorkscrew.so"
    #define PATH_uu "/system/lib/libcutils.so"
    
    typedef ssize_t (*unwindFn)(backtrace_frame_t *, size_t, size_t);
    
    typedef void (*unwindSymbFn)(const backtrace_frame_t *, size_t,
                                 backtrace_symbol_t *);
    
    typedef void (*unwindSymbFreeFn)(backtrace_symbol_t *, size_t);
    
    static void *gHandle = NULL;
    
    int getCallStack(void) {
    
        ssize_t i = 0;
        ssize_t result = 0;
        ssize_t count;
        backtrace_frame_t mStack[MAX_DEPTH];
        backtrace_symbol_t symbols[MAX_DEPTH];
    
        unwindFn unwind_backtrace = NULL;
        unwindSymbFn get_backtrace_symbols = NULL;
        unwindSymbFreeFn free_backtrace_symbols = NULL;
    
    
        if (gHandle == NULL) {
            gHandle = dlopen(PATH_uu, RTLD_NOW);
        }
    
        // open the so.
        if (gHandle == NULL) {
            gHandle = dlopen(PATH, RTLD_NOW);
        }
    
        // get the interface for unwind and symbol analyse
        if (gHandle != NULL) {
            unwind_backtrace = (unwindFn) dlsym(gHandle, "unwind_backtrace");
        } else{
            LOGD("tian>>>dleerr55>%s", dlerror());
        }
    
        if (gHandle != NULL) {
            get_backtrace_symbols = (unwindSymbFn) dlsym(gHandle, "get_backtrace_symbols");
        } else{
            LOGD("tian>>>dleerr444>%s", dlerror());
        }
    
        if (gHandle != NULL) {
            free_backtrace_symbols = (unwindSymbFreeFn) dlsym(gHandle,
                                                              "free_backtrace_symbols");
        } else{
            LOGD("tian>>>dlee6666rr>%s", dlerror());
        }
    
        if (!gHandle || !unwind_backtrace || !get_backtrace_symbols ||
            !free_backtrace_symbols) {
            LOGD("tian Error! cannot get unwind info: handle:%p %p %p %p",
                 gHandle, unwind_backtrace, get_backtrace_symbols, free_backtrace_symbols);
            return result;
        }
    
        count = unwind_backtrace(mStack, 1, MAX_DEPTH);
        LOGD("tian>>>dleecount>%d", count);
        get_backtrace_symbols(mStack, count, symbols);
    
        for (i = 0; i < count; i++) {
            char line[MAX_BACKTRACE_LINE_LENGTH];
    
            const char *mapName = symbols[i].map_name ? symbols[i].map_name : "<unknown>";
            const char *symbolName = symbols[i].demangled_name ? symbols[i].demangled_name :
                                     symbols[i].symbol_name;
            size_t
            fieldWidth = (MAX_BACKTRACE_LINE_LENGTH - 80) / 2;
    
            if (symbolName) {
                uint32_t pc_offset = symbols[i].relative_pc - symbols[i].relative_symbol_addr;
    
                if (pc_offset) {
                    snprintf(line, MAX_BACKTRACE_LINE_LENGTH, "#%02d  pc %08x  %.*s (%.*s+%u)",
                             i, symbols[i].relative_pc, fieldWidth, mapName,
                             fieldWidth, symbolName, pc_offset);
                } else {
                    snprintf(line, MAX_BACKTRACE_LINE_LENGTH, "#%02d  pc %08x  %.*s (%.*s)",
                             i, symbols[i].relative_pc, fieldWidth, mapName,
                             fieldWidth, symbolName);
                }
            } else {
                snprintf(line, MAX_BACKTRACE_LINE_LENGTH, "#%02d  pc %08x  %.*s",
                         i, symbols[i].relative_pc, fieldWidth, mapName);
            }
            LOGD("tian>>>555>%s", line);
        }
        free_backtrace_symbols(symbols, count);
    
        return result;
    }

5.1 手机使用方法。

typedef int (*Unw_BackTrace_Func)(void**, int);
    void print_backtrace() {
        static Unw_BackTrace_Func unw_backtrace = NULL;
        if (!unw_backtrace) {
            void *hanle = dlopen("libunwind.so", RTLD_NOW);
            unw_backtrace = (Unw_BackTrace_Func)dlsym(hanle, "unw_backtrace");
        }
    
        void *buffer[32] = { 0 };
        int n = unw_backtrace((void**)&buffer, 32);
        for(int i = 1; i < n; i++) {
            const char *file = "\t\t\t\t";
            const char *symbol = "\t\t\t\t";
            Dl_info info;
            if (dladdr(buffer[i], &info)) {
                if (info.dli_sname) {
                    symbol = info.dli_sname;
                }
                if (info.dli_fname) {
                    file = info.dli_fname;
                }
            }
    
            LOGI("#%02d: %p \t %s \t %s", i, buffer[i], symbol, file);
        }
    }