之前總看Android的源碼感覺CallStack做的很不錯，現(xiàn)在終于用戶三方庫libunwind做出了自己的CallStack，雖然代碼不多，但也是自己寫的

上代碼

/*************************************************************************> File Name: callstack.h> Author: hsz> Mail:> Created Time: Tue 27 Jul 2021 06:02:23 PM CST************************************************************************/#ifndef __ALIAS_CALLSTACK_H__ #define __ALIAS_CALLSTACK_H__ #include <log/log.h> // 自己寫的log #include <stdio.h> #include <vector> #include <utils/string8.h> // 仿照Android String8，添加了移動構(gòu)造和移動賦值namespace Alias {class CallStack { public:CallStack();CallStack(const char* logtag, int32_t ignoreDepth = 1);~CallStack();void clear() { mStackFrame.clear(); }// Immediately collect the stack traces for the specified thread.// The default is to dump the stack of the current call.void update(int32_t ignoreDepth = 2);void log(const char* logtag,LogLeval::Leval leval = LogLeval::DEBUG) const;// Return a string (possibly very long) containing the complete stack trace.String8 toString() const;// Get the count of stack frames that are in this call stack.size_t size() const { return mStackFrame.size(); }private:std::vector<String8> mStackFrame;uint32_t mSkip; }; } // namespace Alias#endif // __ALIAS_CALLSTACK_H__ /*************************************************************************> File Name: callstack.cpp> Author: hsz> Mail:> Created Time: Tue 27 Jul 2021 06:02:27 PM CST************************************************************************/#define UNW_LOCAL_ONLY #include "callstack.h" #include <cxxabi.h> #include <libunwind.h> #include <stdlib.h>namespace Alias { CallStack::CallStack() {}CallStack::CallStack(const char* logtag, int32_t ignoreDepth) {this->update(ignoreDepth + 1);this->log(logtag); }CallStack::~CallStack() {}void CallStack::update(int32_t ignoreDepth) {mSkip = ignoreDepth;unw_cursor_t cursor;unw_context_t context;unw_getcontext(&context);unw_init_local(&cursor, &context);while (unw_step(&cursor) > 0){unw_word_t offset, funcPointer;unw_get_reg(&cursor, UNW_REG_IP, &funcPointer);if (funcPointer == 0) {break;}char sym[256];if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {char *nameptr = sym;int status = -1;char *demangled = abi::__cxa_demangle(sym, nullptr, nullptr, &status);if (status == 0) {nameptr = demangled;}mStackFrame.push_back(std::move(String8::format("-0x%012x: (%s + %p)", funcPointer, nameptr, offset)));std::free(demangled);} else {mStackFrame.push_back(std::move(String8::format("(unable to obtain symbol name for this frame)")));}} }void CallStack::log(const char* logtag, LogLeval::Leval leval) const {for (size_t i = 0; i < mStackFrame.size() - mSkip; ++i) {log_write(leval, logtag, "%s\n", mStackFrame[i].c_str());} }String8 CallStack::toString() const {String8 str;for (size_t i = 0; i < mStackFrame.size(); ++i) {str += mStackFrame[i];str += "\n";}return std::move(str); }} // namespace Alias

·測試代碼

#include <utils/callstack.h> #include <utils/thread.h>namespace ns {template <typename T, typename U>void func(T t, U u){Alias::CallStack cs;cs.update();Alias::String8 str = cs.toString();printf("%s\n\n\n", str.c_str());cs.log("DEBUG");} }template <typename T> struct Len { public:void len(){Alias::String8 s;ns::func(t, s);} private:T t; };int thread(void *arg) {Len<int> l;l.len();return 0; }int main() {Len<int> l;l.len();Alias::Thread th("Thread", thread);th.run();sleep(2);return 0; }

編譯

運(yùn)行

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