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Send paramHandle to subprocesses as 64-bit on Win64

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The handle to the shared memory segment containing startup
parameters was sent as 32-bit even on 64-bit systems. Since
HANDLEs appear to be allocated sequentially this shouldn't
be a problem until we reach 2^32 open handles in the postmaster,
but a 64-bit value should be sent across as 64-bit, and not
zero out the top 32 bits.

Noted by Tom Lane.
This commit is contained in:
Magnus Hagander 2010-11-16 12:40:56 +01:00
parent 821bb17722
commit d3f62f232f
1 changed files with 8 additions and 0 deletions
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8
src/backend/postmaster/postmaster.c
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@ -3749,7 +3749,11 @@ internal_forkexec(int argc, char *argv[], Port *port)
}
/* Insert temp file name after --fork argument */
#ifdef _WIN64
sprintf(paramHandleStr, "%llu", (LONG_PTR) paramHandle);
#else
sprintf(paramHandleStr, "%lu", (DWORD) paramHandle);
#endif
argv[2] = paramHandleStr;
/* Format the cmd line */
@ -4819,7 +4823,11 @@ read_backend_variables(char *id, Port *port)
HANDLE paramHandle;
BackendParameters *paramp;
#ifdef _WIN64
paramHandle = (HANDLE) _atoi64(id);
#else
paramHandle = (HANDLE) atol(id);
#endif
paramp = MapViewOfFile(paramHandle, FILE_MAP_READ, 0, 0, 0);
if (!paramp)
{