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Drop ptx common header by detecting the end of common line #77

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Drop ptx common header by detecting the end of common line #77

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29 changes: 25 additions & 4 deletions libcuda/cuda_runtime_api.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1538,6 +1538,27 @@ std::list<cuobjdumpSection*> pruneSectionList(std::list<cuobjdumpSection*> cuobj
return prunedList;
}

static const char *
findPtxBody(const char *ptxcode)
{
const char *line_head;

line_head = ptxcode;
while (line_head) {
const char *line_next;

line_next = strchr(line_head, '\n');
if (line_next == NULL)
return NULL;
line_next++;
if (strncmp(line_head, ".address_size", 13) == 0)
return line_next;
line_head = line_next;
}

return NULL;
}

//! Merge all PTX sections that have a specific identifier into one file
std::list<cuobjdumpSection*> mergeMatchingSections(std::list<cuobjdumpSection*> cuobjdumpSectionList, std::string identifier){
const char *ptxcode = "";
Expand All @@ -1559,13 +1580,13 @@ std::list<cuobjdumpSection*> mergeMatchingSections(std::list<cuobjdumpSection*>
}

// Append all the PTX from the last PTX section into the current PTX section
// Add 50 to ptxcode to ignore the information regarding version/target/address_size
if (strlen(ptxcode) >= 50) {
// Find the line after ".address_size" to ignore the information regarding version/target/address_size
ptxcode = findPtxBody(ptxcode);
if (ptxcode != NULL) {
FILE *ptxfile = fopen((ptxsection->getPTXfilename()).c_str(), "a");
fprintf(ptxfile, "%s", ptxcode + 50);
fprintf(ptxfile, "%s", ptxcode);
fclose(ptxfile);
}

old_iter = iter;
old_ptxsection = ptxsection;
}
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