How to take a dump size more than 1024 using LLDB from iOS memory

How to take a dump size more than 1024 using LLDB from iOS memory

By : user2951457
Date : November 18 2020, 11:13 AM
To fix the issue you can do memory read needs to have the --force option before the address range. e.g.
code :
(lldb) me r -o /tmp/outfile.bin -b --force $pc $pc+0x2000
8192 bytes written to '/tmp/outfile.bin'
(lldb) set set target.max-memory-read-size 0x2000
(lldb) me r -o /tmp/outfile.bin -b $pc $pc+0x2000
8192 bytes written to '/private/tmp/outfile.bin'

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Dump memory in lldb

Dump memory in lldb

By : IramG
Date : March 29 2020, 07:55 AM
wish of those help As stated on this site. When I want to dump memory in gdb. , The following works fine for me:
code :
    (lldb) memory read --outfile /tmp/mem.txt 0x6080000fe680 0x6080000fe680+1000
    (lldb) memory read --outfile /tmp/mem.txt --count 1000 0x6080000fe680
    (lldb) memory read --outfile /tmp/mem.bin note1 note1+100
Creating Icons (ICNS) programatically from 1024 * 1024 size NSImage

Creating Icons (ICNS) programatically from 1024 * 1024 size NSImage

By : user2314088
Date : March 29 2020, 07:55 AM
This might help you I have gone through this and get it done with few changes. Here's the working code to generate icon form large size image:
code :
- (void)generateIconSizeFromImage:(NSString *)path
NSImage * smallImage = [[NSImage alloc] initWithContentsOfFile:path];
[smallImage setSize:NSMakeSize(120,120)];

[smallImage lockFocus];

[[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];

[smallImage drawInRect:CGRectMake(0, 0, 120,120)];

[smallImage unlockFocus];

//destination path
NSURL *fileURL = [NSURL fileURLWithPath:@"/Volumes/Harjot/Documents/MyProjects/Cobby Mac App/test60@2x.png"];

CGImageDestinationRef dr = CGImageDestinationCreateWithURL((__bridge CFURLRef)fileURL, kUTTypePNG , 1, NULL);

//setting the dpi, so it create 120 * 120 size icon file
NSDictionary *imageProps1x = @{
                               (__bridge NSString *)kCGImagePropertyDPIWidth: @144.0,
                               (__bridge NSString *)kCGImagePropertyDPIHeight: @144.0,

//get image for desired size
CGImageRef generatedImage = [smallImage CGImageForProposedRect:NULL context:[NSGraphicsContext currentContext] hints:nil];

//now it works and generate the 120 by 120 icon
NSLog(@"width:-- %zu && height:-- %zu",CGImageGetWidth(generatedImage),CGImageGetHeight(generatedImage));

//adding to destination folder
CGImageDestinationAddImage(dr, generatedImage, (__bridge CFDictionaryRef)(imageProps1x));


Why does lldb produce a memory dump file way larger than requested?

Why does lldb produce a memory dump file way larger than requested?

By : Vedran V
Date : March 29 2020, 07:55 AM
this will help A typical memory read, not dumping to file, writes a hex dump. That is, it's not writing the raw bytes from memory, it's formatting them to a human-readable representation. Have you looked at your file? I suspect that's what you'll find, in which case it's obvious why it's much larger than the number of bytes dumped. Each byte of memory is represented by several characters (bytes) in the output representation.
There's a -b/--binary option to memory read that may do what you are apparently expecting.
ValueError: cannot reshape array of size 1048576 into shape (1024,1024,3)

ValueError: cannot reshape array of size 1048576 into shape (1024,1024,3)

By : Ahmed Yusuf
Date : March 29 2020, 07:55 AM
To fix the issue you can do There is two way of encoding pixels:
1- You use an hex code to represent the value of the color
LLDB Show trap opcodes in memory dump

LLDB Show trap opcodes in memory dump

By : chipe88
Date : March 29 2020, 07:55 AM
I wish this helpful for you
Here I set a break at 0x76619b5488 but dumper still shows original instruction at that place.
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