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This patch adds a --log argument to spike. If not given, the behaviour is unchanged: messages logging execution of instructions and (if commit logging is enabled) commits go to stderr. If --log=P is given, Spike now writes these messages to a log file at the path P. This is nice, because they are no longer tangled up with other errors and warnings. The code is mostly plumbing: passing a FILE* object through to the functions that were using stderr. I've written a simple "log_file_t" class, which opens a log file if necessary and yields it or stderr.pull/436/head
Rupert Swarbrick
6 years ago
committed by
GitHub
GitHub
8 changed files with 152 additions and 83 deletions
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// See LICENSE for license details.
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#ifndef _RISCV_LOGFILE_H |
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#define _RISCV_LOGFILE_H |
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#include <stdio.h> |
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#include <memory> |
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#include <sstream> |
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#include <stdexcept> |
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// Header-only class wrapping a log file. When constructed with an
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// actual path, it opens the named file for writing. When constructed
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// with the null path, it wraps stderr.
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class log_file_t |
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{ |
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public: |
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log_file_t(const char *path) |
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: wrapped_file (nullptr, &fclose) |
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{ |
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if (!path) |
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return; |
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wrapped_file.reset(fopen(path, "w")); |
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if (! wrapped_file) { |
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std::ostringstream oss; |
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oss << "Failed to open log file at `" << path << "': " |
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<< strerror (errno); |
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throw std::runtime_error(oss.str()); |
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} |
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} |
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FILE *get() { return wrapped_file ? wrapped_file.get() : stderr; } |
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private: |
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std::unique_ptr<FILE, decltype(&fclose)> wrapped_file; |
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}; |
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#endif |
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