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7 years, 2 months ago.
Heap allocation error
Hi, I'm using sd-driver https://github.com/ARMmbed/sd-driver library with mbed-connector to read and write sd files with the cloud and my platform is K64F. I'm not sure if my problem is related to this library but I tried to remove the sd read/write functions and libraries and everything worked fine. Here is my problem: After compiling and running the code it works fine but after a few minute, I got the error "Operator new out of memory" in the terminal. I'm using these two functions to read and write to sd. (I removed the other part of the code)
include the mbed library with this snippet
#include "mbed.h" #include "security.h" #include "easy-connect.h" #include "simple-mbed-client.h" #include <stdio.h> #include <cstdlib> #include "C12832.h" #include "LM75B.h" #include "MMA7660.h" #include <cstring> #include <string> #include <sstream> //for conversion of data types to string #include <iomanip> //for setting precision of float #include "FATFileSystem.h" #include "SDBlockDevice.h" #include <errno.h> /* mbed_retarget.h is included after errno.h so symbols are mapped to * consistent values for all toolchains */ #include "platform/mbed_retarget.h" SimpleResourceString SDcard_write = client.define_resource("device/0/SD_W", "RED", M2MBase::GET_PUT_ALLOWED, true, &SD_write_updated); SimpleResourceString SDcard_read = client.define_resource("device/0/SD_R", "RED", M2MBase::GET_ALLOWED, true); void SD_write_updated(string new_value) { printf("device/0/name changed to:\r\n"); printf("%s\r\n", new_value.c_str()); sd_write=true; sd_write_value=new_value; } void SD_read_updated(void* args){ printf("Reading from SD Card...\r\n"); sd_read=true; } void sd_write_open() { string str2; // char *y; // int size=128; // char *y =(char *)malloc(size); string sub="\\n"; // str2 is string to search, sub is the substring to search for vector<size_t> positions; // holds all the positions that sub occurs within str size_t pos = sd_write_value.find(sub, 0); while(pos != string::npos) { positions.push_back(pos); pos = sd_write_value.find(sub,pos+1); } for(int i=0; i<positions.size(); ++i) { printf("list the posistions %d\n",positions[i]); } // printf("sd_write_value size is %d\n",sd_write_value.size()); printf("Writing to Sd card...\n"); FILE* fd = fopen("/sd/mydir/out.txt", "w+"); errno_error(fd); for(int i=0; i<=positions.size(); i++) { if(i==0) { str2= sd_write_value.substr(0,positions[i]); } else if (i==positions.size()) { str2= sd_write_value.substr(positions[i-1]+2,sd_write_value.size()); } else { str2= sd_write_value.substr(positions[i-1]+2,positions[i]-(positions[i-1]+2)); } // y=str2.c_str(); // char *y = &str2[0u]; printf("here is the %d line: ",i); printf("%s\n",str2); fprintf(fd, "%s\n", str2); } fclose(fd); printf("Done"); } void sd_read_open() { string sum; printf("Reading file at /sd/mydir/in.txt\n"); FILE *fp = fopen("/sd/mydir/in.txt", "r"); char buffer [128]; size_t i=0; while (!feof(fp)){ bool ret = (fgets(buffer, 64, fp)) ; if(ret) { sum.append(buffer); printf("Here is the %d line:",i); printf ("%s\n", buffer); } i++; } SDcard_read=sum; // printf("Here is the sum: \n"); // printf("%s\n",sum); fclose(fp); }
Any help would be appriciated.