VS Code can't find malloc.c - c++

Question

I'm getting an eror when I include cstdlib in C++.
Unable to open 'malloc.c': File not found (file:///build/glibc-bfm8X4/glibc-2.23/malloc/malloc.c).
The error comes from the top part of the VS code window.
(the error occurs during debugging.)
Here's some of the code:
#include <cstdlib>
#include <portaudio.h>
//...
static int paCallback( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
/* Cast data passed through stream to our structure. */
paTestData *data = (paTestData*)userData;
float *out = (float*)outputBuffer;
unsigned int i;
(void) inputBuffer; /* Prevent unused variable warning. */
for( i=0; i<framesPerBuffer; i++ )
{
*out++ = data->left_phase; /* left */
*out++ = data->right_phase; /* right */
float currentSample = 0;
char *sampleData = new char[4];
for(int j = 0; j < 4; j++)
{
sampleData[j] = currentBuffer[&currentIndex + j];
}
currentSample = (float)atof(sampleData); //cstdlib is included to use atof
//gets audio sample data and forwards to PortAudio
data->left_phase = currentSample;
data->right_phase = currentSample;
currentIndex += 4;
}
return 0;
}
I'm using Linux Mint 81.1 if that helps.

Answer 1

I've fixed this in the follow way ..
my error is
"Unable to open 'libc-start.c': File not found (file:///build/glibc-OTsEL5/glibc-2.27/csu/libc-start.c"
so I make a dir in the root directory
$cd /
$sudo mkdir build
$cd build
$sudo mkdir glibc-OTsEL5
$cd glibc-OTsEL5
and then download the glibc from internet
$sudo wget http://ftp.gnu.org/gnu/glibc/glibc-2.27.tar.gz
then unpack it
$sudo tar -xzvf glibc-2.27.tar.gz
every thing seems to be ok
This solution is taken from https://github.com/microsoft/vscode-cpptools/issues/811#issuecomment-406544778

Answer 2

I encounter the same problem. The problem is that I did not compile the cpp file with debug flag -g.........When I re-compile the cpp file containing malloc and reinterpret_cast, the problem disappeared.
But I am wrong. The true solution is not to step the line that malloc is in, other wise, the source file of malloc.c is needed.
cf, https://github.com/microsoft/vscode-cpptools/issues/811#issuecomment-559085447