45 lines
1.1 KiB
Markdown
45 lines
1.1 KiB
Markdown
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Script supports 2 custom commands:
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1) watch_heap : sets break point at dynamic memory allocation and keeps track of it
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2) print_ptr : prints the memory pointed by raw pointer in hex format.
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eg:
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(gdb) print_ptr malloc_ptr
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Type : int *
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Starting Address: 0x55555556aeb0
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Length : 40
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0x01 0x00 0x00 0x00 0x02 0x00 0x00 0x00 0x03 0x00 0x00 0x00
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0x04 0x00 0x00 0x00 0x05 0x00 0x00 0x00 0x06 0x00 0x00 0x00
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0x07 0x00 0x00 0x00 0x08 0x00 0x00 0x00 0x09 0x00 0x00 0x00
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0x0a 0x00 0x00 0x00
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If print_ptr is used after free/delete[], then it would print "No address mapping found!"
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Tests:
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To run the test
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In the heap_print dir,
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Compile :
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g++ -O0 -g test/sample_heap_test.cc -o test/sample_heap_test.o
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And then Run:
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$ gdb
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$ source test/test_heap_print_script.py
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Future Goals:
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To handle pointer offset, for eg, (gdb) print_ptr malloc_ptr + 3
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To handle custom allacator, may be watch_heap command could take in arguements
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and sets additional break points.
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