WebInvalid read ¶ This other code will produce a Invalid read error : int main(void) { int i; int *ptr = NULL; i = *ptr; return (0); } If we compile and run this code, Valgrind will produce this error : ==26212== Invalid read of size 4 ==26212== at 0x400497: main (test.c:8) ==26212== Address 0x0 is not stack\'d, malloc\'d or (recently) free\'d WebThe issue here is that letter_index can have values outside of the 0 - 26 range (if the current character is the string terminator for example) - meaning children [letter_index] can contain a junk pointer and hence the invalid read. Share Improve this answer Follow answered Aug 6, 2016 at 18:08 Finn Ashley 7 1 1 6 Add a comment
Valgrind says "Invalid read of size 4". What
Web2 days ago · 1 Answer Sorted by: 2 You are seeking ifs to the end of the file, but you forgot to seek it back to the beginning before calling read (), so there is nothing for read () to read. You need that 2nd seek, eg: ifstream ifs (INPUT_FILE_NAME,ios::binary); ifs.seekg (0, ifs.end); size_t N = ifs.tellg (); ifs.seekg (0, ifs.beg); // <-- ADD THIS! Web要解决这个问题，您应该分配足够的空间来容纳一个指针数组。 每个指针取 sizeof (char*) ，也可以写成 sizeof (*return_data) 或 sizeof *return_data 。 因此，您总共应该分配 n * sizeof *return_data 字节，其中 n 是 (在您的情况下)魔数 (Magic Number) 6。 关于c - Valgrind 提示 "Invalid write of size 8"，我们在Stack Overflow上找到一个类似的问题： … iphone 13 pro max case michael kors
Mean Absolute Error Code in C++ - CodeProject
WebJul 23, 2005 · Valgrind says ==11604== Invalid read of size 4 ==11604== at 0x8048ABB: main (foo.cc:36) ==11604== Address 0x1B92415C is 4 bytes inside a block of size 8 free'd Web==397018== Invalid read of size 1 ==397018== at 0x527689D: JUMP_TO_L3_EXT_HEADER (unsigned char const*, unsigned char, unsigned long) (ip_proto.h:628) ==397018== by 0x5276A2B: JUMP_TO_L3_FRAG_HEADER (unsigned char const*, unsigned long) (ip_proto.h:654) ==397018== by 0x5276B1D: … WebThe issue here is that letter_index can have values outside of the 0 - 26 range (if the current character is the string terminator for example) - meaning children [letter_index] can … iphone 13 pro max case hawaii