Function isZeroSizeFrame

src/stackFrame_aarch64.cpp:99–143

Check if this is a well-known leaf stub that does not change stack pointer

// Check if this is a well-known leaf stub that does not change stack pointer
static inline bool isZeroSizeFrame(const char* name) {
    // Dispatch by the first character to optimize lookup
    switch (name[0]) {
        case 'I':
            return streq(name, "InlineCacheBuffer");
        case 'S':
            return startsWith(name, "SafeFetch");
        case 'a':
            return startsWith(name, "atomic");
        case 'b':
            return startsWith(name, "bigInteger")
                || startsWith(name, "base64_encodeBlock")
                || streq(name, "backward_copy_longs");
        case 'c':
            return startsWith(name, "copy_")
                || startsWith(name, "compare_long_string_");
        case 'e':
            return streq(name, "encodeBlock");
        case 'f':
            return startsWith(name, "f2hf")
                || streq(name, "forward_copy_longs")
                || streq(name, "foward_copy_longs");  // there is a typo in JDK 8
        case 'g':
            return startsWith(name, "ghash_processBlocks") && strchr(name + 19, 'w') == NULL;
        case 'h':
            return startsWith(name, "hf2f");
        case 'i':
            return startsWith(name, "itable");
        case 'l':
            return startsWith(name, "large_byte_array_inflate")
                || startsWith(name, "lookup_secondary_supers_");
        case 'm':
            return startsWith(name, "md5_implCompress");
        case 's':
            return startsWith(name, "sha1_implCompress");
        case 'u':
            return startsWith(name, "updateBytesAdler32");
        case 'v':
            return startsWith(name, "vtable");
        case 'z':
            return startsWith(name, "zero_");
        default:
            return false;
    }
}

bool StackFrame::unwindStub(instruction_t* entry, const char* name, uintptr_t& pc, uintptr_t& sp, uintptr_t& fp) {
    instruction_t* ip = (instruction_t*)pc;