kopia lustrzana https://github.com/espressif/esp-idf
43 wiersze
1.1 KiB
Markdown
43 wiersze
1.1 KiB
Markdown
# Host test for EH_FRAME_PARSER
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This test is meant to be run on a Linux x86(_64) host. The main purpose is to
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trigger a SIGSEV (NULL pointer) exception at runtime in order to generate the
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backtrace. It is then checked that the functions in the call stack are indeed
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correctly determined in the right order.
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## Requirements
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A Linux host, x86 or x86_64. In any case, the example will be compiled with
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the option `-m32`, it is then required to have gcc multilibs.
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## Compile the example
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To compile the example, simply type:
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```
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make
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```
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## Run the code
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Execute the binary generated:
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```
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./eh_frame_test
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```
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If everything goes well, the output should be as is:
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```
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All tests passed
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```
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## Known issue
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DWARF instructions in `x86` binaries include the instruction `DW_CFA_expression`.
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However, this instruction is not supported by the parser, this is why the test
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may print the following message:
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```
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Unsupported DWARF opcode 0: 0x10
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```
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This is not a big problem as the functions implemented for testing the backtrace
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will not generate unimplemented DWARF instructions.
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