Function LoadSymbols

src/brpc/builtin/pprof_service.cpp:402–500

}

static void LoadSymbols() {
    butil::Timer tm;
    tm.start();
    butil::ScopedFILE fp(fopen("/proc/self/maps", "r"));
    if (fp == NULL) {
        return;
    }
    char* line = NULL;
    size_t line_len = 0;
    ssize_t nr = 0;
    while ((nr = getline(&line, &line_len, fp.get())) != -1) {
        butil::StringSplitter sp(line, line + nr, ' ');
        if (sp == NULL) {
            continue;
        }
        char* endptr;
        uintptr_t start_addr = strtoull(sp.field(), &endptr, 16);
        if (*endptr != '-') {
            continue;
        }
        ++endptr;
        uintptr_t end_addr = strtoull(endptr, &endptr, 16);
        if (*endptr != ' ') {
            continue;
        }
        ++sp;
        // ..x. must be executable
        if (sp == NULL || sp.length() != 4 || sp.field()[2] != 'x') {
            continue;
        }
        ++sp;
        if (sp == NULL) {
            continue;
        }
        size_t offset = strtoull(sp.field(), &endptr, 16);
        if (*endptr != ' ') {
            continue;
        }        
        //skip $4~$5
        for (int i = 0; i < 3; ++i) {
            ++sp;
        }
        if (sp == NULL) {
            continue;
        }
        size_t n = sp.length();
        if (sp.field()[n-1] == '\n') {
            --n;
        }
        std::string path(sp.field(), n);
        if (!HasExt(path, ".so") && !HasExt(path, ".dll") &&
            !HasExt(path, ".dylib") && !HasExt(path, ".bundle")) {
            continue;
        }
        LibInfo info;
        info.start_addr = start_addr;
        info.end_addr = end_addr;
        info.offset = offset;